WO2004065073A2 - Five degrees of freedom mobile robot - Google Patents

Five degrees of freedom mobile robot Download PDF

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Publication number
WO2004065073A2
WO2004065073A2 PCT/US2004/000744 US2004000744W WO2004065073A2 WO 2004065073 A2 WO2004065073 A2 WO 2004065073A2 US 2004000744 W US2004000744 W US 2004000744W WO 2004065073 A2 WO2004065073 A2 WO 2004065073A2
Authority
WO
WIPO (PCT)
Prior art keywords
robot
camera
housing
monitor
coupled
Prior art date
Application number
PCT/US2004/000744
Other languages
French (fr)
Other versions
WO2004065073A8 (en
WO2004065073A3 (en
Inventor
Yulun Wang
Charles S. Jordan
Keith Philip Laby
James Cuevas
Jonathan Southard
Mike Medus
Steven Edward Butner
Original Assignee
Intouch-Health, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Intouch-Health, Inc. filed Critical Intouch-Health, Inc.
Priority to EP04701544A priority Critical patent/EP1594660A4/en
Priority to JP2006500920A priority patent/JP2006524578A/en
Publication of WO2004065073A2 publication Critical patent/WO2004065073A2/en
Publication of WO2004065073A3 publication Critical patent/WO2004065073A3/en
Publication of WO2004065073A8 publication Critical patent/WO2004065073A8/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J5/00—Manipulators mounted on wheels or on carriages
    • B25J5/007—Manipulators mounted on wheels or on carriages mounted on wheels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/30—Surgical robots
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/30—Surgical robots
    • A61B34/35—Surgical robots for telesurgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/70—Manipulators specially adapted for use in surgery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
    • B25J19/02—Sensing devices
    • B25J19/021—Optical sensing devices
    • B25J19/023—Optical sensing devices including video camera means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/36—Image-producing devices or illumination devices not otherwise provided for
    • A61B90/37—Surgical systems with images on a monitor during operation
    • A61B2090/372—Details of monitor hardware
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/36—Image-producing devices or illumination devices not otherwise provided for
    • A61B90/361—Image-producing devices, e.g. surgical cameras

Definitions

  • the subject matter disclosed generally relates to the use of robotics in the field of healthcare.
  • Robots have been used in a variety of applications ranging from remote control of hazardous material to assisting in the performance of surgery.
  • U.S. Patent No. 5,762,458 issued to Wang et al discloses a system that allows a surgeon to perform minimally invasive medical procedures through the use of robotically controlled instruments.
  • One of the robotic arms in the Wang system moves an endoscope which has a camera that allows a surgeon to view a surgical area of a patient .
  • Tele-robots such as hazardous waste handlers and bomb detectors may contain a camera that allows the operator to view the remote site.
  • Canadian Pat. No. 2289697 issued to Treviranus, et al . discloses a teleconferencing platform that has both a camera and a monitor. The platform includes mechanisms to both pivot and raise the camera and monitor.
  • the teleconferencing platform disclosed in the Canadian patent is stationary and cannot move about a building.
  • a robot that may include a three degree of freedom platform coupled to a housing.
  • the robot further has a monitor and a camera coupled to the housing.
  • a first device of the robot moves the camera in a fourth degree of freedom.
  • a second device of the robot moves the camera in a second degree of freedom.
  • Figures 1 is an illustration of a robotic system
  • Figure 2 is a schematic of an electrical system of a robot
  • Figure 3 is a further schematic of the electrical system of the robot
  • Figure 4 is side view of the robot
  • Figure 5 is a top perspective view of a holonomic platform of the robot
  • Figure 6 is a side perspective view of a roller assembly of the holonomic platform
  • Figure 7 is a bottom perspective view showing a pedestal assembly of the robot;
  • Figure 8 is a sectional view showing an actuator of the pedestal assembly;
  • Figure 9 is a side view of a robot head.
  • a robotic system that includes a remote controlled robot with at least five degrees of freedom and a tele-conferencing function.
  • the robot may include a camera, a monitor and a holonomic platform all attached to a robot housing.
  • the robot may be controlled by a remote control station that also has a camera and a monitor.
  • the remote control station may be linked to a base station that is wirelessly coupled to the robot.
  • the cameras and monitors allow a care giver at the remote location to monitor and care for a patient through the robot.
  • the holonomic platform provides three degrees of freedom to allow the robot to move about a home or facility to locate and/or follow a patient.
  • the robot also has mechanisms to provide at least two degrees of freedom for the camera.
  • Figure 1 shows a robotic system 10.
  • the robotic system 10 includes a robot 12, a base station 14 and a remote control station 16.
  • the remote control station 16 may be coupled to the base station 14 through a network 18.
  • the network 18 may be either a packet switched network such as the Internet, or a circuit switched network such has a Public Switched Telephone Network (PSTN) or other broadband system.
  • PSTN Public Switched Telephone Network
  • the base station 14 may be coupled to the network 18 by a modem 20 or other broadband network interface device.
  • the remote control station 16 may include a computer 22 that has a monitor 24, a camera 26, a microphone 28 and a speaker 30.
  • the computer 22 may also contain an input device 32 such as a joystick or a mouse.
  • the control station 16 is typically located in a place that is remote from the robot 12. Although only one remote control station 16 is shown, the system 10 may include a plurality of remote stations . Additionally, although only one robot 12 is shown, it is to be understood that the system 10 may have a plurality of robots 12. In general any number of robots 12 may be controlled by any number of remote stations 16. For example, one remote station 16 may be coupled to a plurality of robots 12, or one robot 12 may be coupled to a plurality of remote stations 16.
  • the robot 12 includes a movement platform 34 that is attached to a robot housing 36. Also attached to the robot housing 36 are. a camera 38, a monitor 40, a microphone (s) 42 and a speaker 44. The microphone 42 and speaker 30 may create a stereophonic sound.
  • the robot 12 may also have an antenna 45 that is wirelessly coupled to an antenna 46 of the base station 14.
  • the system 10 allows a user at the remote control station 16 to move the robot 12 through the input device 32.
  • the robot camera 38 is coupled to the remote monitor 24 so that a user at the remote station 16 can view a patient.
  • the robot monitor 40 is coupled to the remote camera 26 so that the patient can view the user.
  • the microphones 28 and 42, and speakers 30 and 44 allow for audible communication between the patient and the user.
  • the robot 12 may further have a handle 48 that can be rotated to a down position to allow someone to manually push or pull the robot 12.
  • the remote station computer 22 may operate Microsoft OS software and WINDOWS XP or other operating systems such as LINUX.
  • the remote computer 22 may also operate a video driver, a camera driver, an audio driver and a joystick driver.
  • the video images may be transmitted and received with compression software such as MPEG CODEC.
  • FIGS 2 and 3 show an embodiment of the robot 12.
  • the robot 12 may include a high level control system 50 and a low level control system 52.
  • the high level control system 50 may include a processor 54 that is connected to a bus 56.
  • the bus 56 is coupled to the camera 38 by an input/output (I/O) port 58, and to the monitor 40 by a serial output port 60 and a VGA driver 62.
  • the monitor 40 may include a touchscreen function that allows the patient to enter input by touching the monitor screen.
  • the speaker 44 is coupled to the bus 56 by a digital to analog converter 64.
  • the microphone 42 is coupled to the bus 56 by an analog to digital converter 66.
  • the high level controller 50 may also contain random access memory (RAM) device 68, a non-volatile RAM device 70 and a mass storage device 72 that are all coupled to the bus 56.
  • the mass storage device 72 may contain medical files of the patient that can be accessed by the user at the remote control station 16.
  • the mass storage device 72 may contain a picture of the patient.
  • the user particularly a health care provider, can recall the old picture and make a side by side comparison on the monitor 24 with a present video image of the patient provided by the camera 38.
  • the robot antennae 45 may be coupled to a wireless transceiver 74.
  • the transceiver 74 may transmit and receive information in accordance with IEEE 802.11b.
  • the controller 54 may operate with a LINUX OS operating system.
  • the controller 54 may also operate MS WINDOWS along with video, camera and audio drivers for communication with the remote control station 16.
  • Video information may be transceived using MPEG CODEC compression techniques.
  • the software may allow the user to send e-mail to the patient and vice versa, or allow the patient to access the Internet.
  • the high level controller 50 operates to control the communication between the robot 12 and the remote control station 16.
  • the high level controller 50 may be linked to the low level controller 52 by serial ports 76 and 78.
  • the low level controller 52 includes a processor 80 that is coupled to a RAM device 82 and non-volatile RAM device 84 by a bus 86.
  • the robot 12 contains a plurality of motors 88 and motor encoders 90.
  • the encoders 90 provide feedback information regarding the output of the motors 88.
  • the motors 88 can be coupled to the bus 86 by a digital to analog converter 92 and a driver amplifier 94.
  • the encoders 90 can be coupled to the bus 86 by a decoder 96.
  • the robot 12 also has a number of proximity sensors 98 (see also Fig. 1) .
  • the position sensors 98 can be coupled to the bus 86 by a signal conditioning circuit 100 and an analog to digital converter 102.
  • the low level controller 52 runs software routines that mechanically actuate the robot 12. For example, the low level controller 52 provides instructions to actuate the movement platform to move the robot 12. The low level controller 52 may receive movement instructions from the high level controller 50. The movement instructions may be received as movement commands from the remote control station. Although two controllers are shown, it is to be understood that the robot 12 may have one controller controlling the high and low level functions .
  • the various electrical devices of the robot 12 may be powered by a battery (ies) 104.
  • the battery 104 may be recharged by a battery recharger station 106.
  • the low level controller 52 may include a battery control circuit 108 that senses the power level of the battery 104. The low level controller 52 can sense when the power falls below a threshold and then send a message to the high level controller 50.
  • the high level controller 50 may include a power management software routine that causes the robot 12 to move so that the battery 104 is coupled to the recharger 106 when the battery power falls below a threshold value. Alternatively, the user can direct the robot 12 to the battery recharger 106. Additionally, the battery 104 may be replaced or the robot 12 may be coupled to a wall power outlet by an electrical cord (not shown) .
  • FIG. 4 shows an embodiment of the robot 12.
  • the robot 12 may include a holonomic platform 110 that is attached to a robot housing 112.
  • the holonomic platform 110 provides three degrees of freedom to allow the robot 12 to move in any direction.
  • the robot 12 may have a pedestal assembly 114 that supports the camera 38 and the monitor 40.
  • the pedestal assembly 114 may have two degrees of freedom so that the camera 26 and monitor 24 can be swiveled and pivoted as indicated by the arrows.
  • the holonomic platform 110 may include three roller assemblies 120 that are mounted to a base plate 121.
  • the roller assemblies 120 allow for movement in any direction.
  • the robot housing 112 may include a bumper 122.
  • the bumper 122 may be coupled to optical position sensors 123 that detect when the bumper 122 has engaged an object. After engagement with the object the robot can determine the direction of contact and prevent further movement into the object.
  • FIG. 6 shows an embodiment of a roller assembly 120.
  • Each assembly 120 may include a drive ball 124 that is driven by a pair of transmission rollers 126.
  • the assembly 120 includes a retainer ring 128 and a plurality of bushings 130 that allow the ball 124 to rotate but prevent movement in a z direction.
  • the transmission rollers 126 are coupled to a motor assembly 132.
  • the assembly 132 corresponds to the motor 88 shown in Fig. 3.
  • the motor assembly 132 includes an output pulley 134 attached to a motor 136.
  • the output pulley 134 is coupled to a pair of ball pulleys 138 by a drive belt 140.
  • the ball pulleys 138 are attached to drive pins 142 that are attached to a transmission bracket 144.
  • the transmission rollers 126 are attached to a transmission bracket 144 by a roller pin 146. Rotation of the output pulley 134 rotates the ball pulleys 138. Rotation of the ball pulleys 138 cause the transmission rollers 126 to rotate and spin the ball 124 through frictional forces.
  • the drive balls 126 are out of phase so that one of the balls 126 is always in contact with ball 124.
  • the roller pin 146 and bracket 144 allow the transmission rollers 126 to freely spin and allow orthogonal directional passive movement when one of the other roller assemblies 120 is driving and moving the robot 12.
  • the pedestal assembly 114 may include a motor 150 that is coupled to a gear 152 by a belt 154.
  • the gear 152 is attached to a bushing 156.
  • the bushing 156 is attached to an arm 158 that is coupled to the camera 38 and monitor 40 by a bracket 160.
  • Activation of the motor 150 rotates the gear 152 and causes the camera 38 and monitor 40 to spin about a spin axis (see also Fig. 4) as indicated by the arrows 4.
  • the motor 150 provides a fourth degree of freedom for the camera 38 and the monitor 40.
  • the assembly 114 may further include a tilt motor 162 within the arm 158 that can cause the monitor 40 and camera 38 to pivot about a pivot axis as indicated by the arrows 5 (see also Figs. 4 and 7) .
  • the pivot axis may intersect the spin axis so that the assembly 114 functions like a neck that can turn the camera 38 side to side, and up and down.
  • the tilt motor 162 may rotate a worm 164 that rotates a worm gear 166.
  • the pin 168 is rigidly attached to both the worm gear 166 and the bracket 160 so that rotation of the gear 166 pivots the camera 38 and the monitor 40.
  • the bracket 160 may have a counterweight 170 to counter the weight of the camera 38 and monitor 40.
  • the camera 38 may also include a zoom feature to provide yet another degree of freedom for the operator.
  • the motor 162 provides a fifth degree of freedom for the camera 38 and the monitor 40.
  • Figure 9 shows a robot head 200 that can both pivot and spin the camera 38 and the monitor 40.
  • the robot head 200 can be similar to the robot 12 but without the platform 110.
  • the robot head 200 may have the same mechanisms and parts to both pivot the camera 38 and monitor 40 about the pivot axis 4, and spin the camera 38 and monitor 40 about the spin axis 5.
  • the pivot axis may intersect the spin axis. Having a robot head 200 that both pivots and spins provides a wide viewing area.
  • the robot 12 or robot head may be placed in a home or a facility where one or more patients are to be monitored and/or assisted.
  • the facility may be a hospital or a residential care facility.
  • the robot 12 may be placed in a home where a health care provider may monitor and/or assist the patient.
  • a friend or family member may communicate with the patient.
  • the cameras and monitors at both the robot/robot head and remote control station allow for teleconferencing between the patient and the person at the remote station.
  • the robot 12 can be maneuvered through the home or facility by manipulating the input device 32 at the remote station 16.
  • the five degrees of freedom in the robot 12 allow the operator at the remote station 16 to obtain any desired viewing angle.
  • the robot 12 may have autonomous movement.
  • the robot 12 may be programmed to automatically move to a patients room at a certain time to dispense drugs located in a drawer (not shown) without input from the remote station 16.
  • the robot 12 can be programmed to monitor and/or assist a patient 24 hours a day, 7 days a week. Such a monitoring capability is enhanced by the autonomous recharging function of the robot.

Abstract

A robotic system (10) that includes a remote controlled robot (12) with at least five degrees of freedom and a teleconferencing function. The robot may include a camera, a monitor and a holonomic platform all attached to a robot housing. The robot may be controlled by a remote control station (16) that also has a camera (26) and a monitor (24). The remote control station may be linked to a base station (14) that is wirelessly coupled to the robot. The cameras and monitors allow a care giver at the remote location to monitor and care for a patient through the robot. The holonomic platform provides three degrees of freedom to allow the robot to move about a home or facility to locate and/or follow a patient. The robot also has mechanisms to provide at least two degrees of freedom for the camera.

Description

FIVE DEGREES OF FREEDOM MOBILE ROBOT
REFERENCE TO CROSS-RELATED APPLICATIONS
This is an International Application claiming priority to United States Patent Application No. 10/439,122 filed on May 14, 2003, which claims priority to United States Provisional Application No. 60/440,586 filed on January 15, 2003.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The subject matter disclosed generally relates to the use of robotics in the field of healthcare.
2. Background Information
There is a growing need to provide remote health care to patients that have a variety of ailments ranging from Alzheimers to stress disorders. To minimize costs it is desirable to provide home care for such patients. Home care typically requires a periodic visit by a health care provider such as a nurse or some type of assistant. Due to financial and/or staffing issues the health care provider may not be there when the patient needs some type of assistance. Additionally, existing staff must be continuously trained, which can create a burden on training personnel. It would be desirable to provide a system that would allow a health care provider to remotely care for a patient without being physically present .
Robots have been used in a variety of applications ranging from remote control of hazardous material to assisting in the performance of surgery. For example, U.S. Patent No. 5,762,458 issued to Wang et al . discloses a system that allows a surgeon to perform minimally invasive medical procedures through the use of robotically controlled instruments. One of the robotic arms in the Wang system moves an endoscope which has a camera that allows a surgeon to view a surgical area of a patient .
Tele-robots such as hazardous waste handlers and bomb detectors may contain a camera that allows the operator to view the remote site. Canadian Pat. No. 2289697 issued to Treviranus, et al . discloses a teleconferencing platform that has both a camera and a monitor. The platform includes mechanisms to both pivot and raise the camera and monitor. The teleconferencing platform disclosed in the Canadian patent is stationary and cannot move about a building.
BRIEF SUMMARY OF THE INVENTION
A robot that may include a three degree of freedom platform coupled to a housing. The robot further has a monitor and a camera coupled to the housing. A first device of the robot moves the camera in a fourth degree of freedom. A second device of the robot moves the camera in a second degree of freedom.
BRIEF DESCRIPTION OF THE DRAWINGS
Figures 1 is an illustration of a robotic system;
Figure 2 is a schematic of an electrical system of a robot;
Figure 3 is a further schematic of the electrical system of the robot;
Figure 4 is side view of the robot;
Figure 5 is a top perspective view of a holonomic platform of the robot;
Figure 6 is a side perspective view of a roller assembly of the holonomic platform;
Figure 7 is a bottom perspective view showing a pedestal assembly of the robot; Figure 8 is a sectional view showing an actuator of the pedestal assembly;
Figure 9 is a side view of a robot head. DETAILED DESCRIPTION
Disclosed is a robotic system that includes a remote controlled robot with at least five degrees of freedom and a tele-conferencing function. The robot may include a camera, a monitor and a holonomic platform all attached to a robot housing. The robot may be controlled by a remote control station that also has a camera and a monitor. The remote control station may be linked to a base station that is wirelessly coupled to the robot. The cameras and monitors allow a care giver at the remote location to monitor and care for a patient through the robot. The holonomic platform provides three degrees of freedom to allow the robot to move about a home or facility to locate and/or follow a patient. The robot also has mechanisms to provide at least two degrees of freedom for the camera.
Referring to the drawings more particularly by reference numbers, Figure 1 shows a robotic system 10. The robotic system 10 includes a robot 12, a base station 14 and a remote control station 16. The remote control station 16 may be coupled to the base station 14 through a network 18. By way of example, the network 18 may be either a packet switched network such as the Internet, or a circuit switched network such has a Public Switched Telephone Network (PSTN) or other broadband system. The base station 14 may be coupled to the network 18 by a modem 20 or other broadband network interface device.
The remote control station 16 may include a computer 22 that has a monitor 24, a camera 26, a microphone 28 and a speaker 30. The computer 22 may also contain an input device 32 such as a joystick or a mouse. The control station 16 is typically located in a place that is remote from the robot 12. Although only one remote control station 16 is shown, the system 10 may include a plurality of remote stations . Additionally, although only one robot 12 is shown, it is to be understood that the system 10 may have a plurality of robots 12. In general any number of robots 12 may be controlled by any number of remote stations 16. For example, one remote station 16 may be coupled to a plurality of robots 12, or one robot 12 may be coupled to a plurality of remote stations 16. The robot 12 includes a movement platform 34 that is attached to a robot housing 36. Also attached to the robot housing 36 are. a camera 38, a monitor 40, a microphone (s) 42 and a speaker 44. The microphone 42 and speaker 30 may create a stereophonic sound. The robot 12 may also have an antenna 45 that is wirelessly coupled to an antenna 46 of the base station 14. The system 10 allows a user at the remote control station 16 to move the robot 12 through the input device 32. The robot camera 38 is coupled to the remote monitor 24 so that a user at the remote station 16 can view a patient. Likewise, the robot monitor 40 is coupled to the remote camera 26 so that the patient can view the user. The microphones 28 and 42, and speakers 30 and 44, allow for audible communication between the patient and the user. The robot 12 may further have a handle 48 that can be rotated to a down position to allow someone to manually push or pull the robot 12.
The remote station computer 22 may operate Microsoft OS software and WINDOWS XP or other operating systems such as LINUX. The remote computer 22 may also operate a video driver, a camera driver, an audio driver and a joystick driver. The video images may be transmitted and received with compression software such as MPEG CODEC.
Figures 2 and 3 show an embodiment of the robot 12. The robot 12 may include a high level control system 50 and a low level control system 52. The high level control system 50 may include a processor 54 that is connected to a bus 56. The bus 56 is coupled to the camera 38 by an input/output (I/O) port 58, and to the monitor 40 by a serial output port 60 and a VGA driver 62. The monitor 40 may include a touchscreen function that allows the patient to enter input by touching the monitor screen.
The speaker 44 is coupled to the bus 56 by a digital to analog converter 64. The microphone 42 is coupled to the bus 56 by an analog to digital converter 66. The high level controller 50 may also contain random access memory (RAM) device 68, a non-volatile RAM device 70 and a mass storage device 72 that are all coupled to the bus 56. The mass storage device 72 may contain medical files of the patient that can be accessed by the user at the remote control station 16. For example, the mass storage device 72 may contain a picture of the patient. The user, particularly a health care provider, can recall the old picture and make a side by side comparison on the monitor 24 with a present video image of the patient provided by the camera 38. The robot antennae 45 may be coupled to a wireless transceiver 74. By way of example, the transceiver 74 may transmit and receive information in accordance with IEEE 802.11b.
The controller 54 may operate with a LINUX OS operating system. The controller 54 may also operate MS WINDOWS along with video, camera and audio drivers for communication with the remote control station 16. Video information may be transceived using MPEG CODEC compression techniques. The software may allow the user to send e-mail to the patient and vice versa, or allow the patient to access the Internet. In general the high level controller 50 operates to control the communication between the robot 12 and the remote control station 16.
The high level controller 50 may be linked to the low level controller 52 by serial ports 76 and 78. The low level controller 52 includes a processor 80 that is coupled to a RAM device 82 and non-volatile RAM device 84 by a bus 86. The robot 12 contains a plurality of motors 88 and motor encoders 90. The encoders 90 provide feedback information regarding the output of the motors 88. The motors 88 can be coupled to the bus 86 by a digital to analog converter 92 and a driver amplifier 94. The encoders 90 can be coupled to the bus 86 by a decoder 96. The robot 12 also has a number of proximity sensors 98 (see also Fig. 1) . The position sensors 98 can be coupled to the bus 86 by a signal conditioning circuit 100 and an analog to digital converter 102.
The low level controller 52 runs software routines that mechanically actuate the robot 12. For example, the low level controller 52 provides instructions to actuate the movement platform to move the robot 12. The low level controller 52 may receive movement instructions from the high level controller 50. The movement instructions may be received as movement commands from the remote control station. Although two controllers are shown, it is to be understood that the robot 12 may have one controller controlling the high and low level functions .
The various electrical devices of the robot 12 may be powered by a battery (ies) 104. The battery 104 may be recharged by a battery recharger station 106. The low level controller 52 may include a battery control circuit 108 that senses the power level of the battery 104. The low level controller 52 can sense when the power falls below a threshold and then send a message to the high level controller 50. The high level controller 50 may include a power management software routine that causes the robot 12 to move so that the battery 104 is coupled to the recharger 106 when the battery power falls below a threshold value. Alternatively, the user can direct the robot 12 to the battery recharger 106. Additionally, the battery 104 may be replaced or the robot 12 may be coupled to a wall power outlet by an electrical cord (not shown) .
Figure 4 shows an embodiment of the robot 12. The robot 12 may include a holonomic platform 110 that is attached to a robot housing 112. The holonomic platform 110 provides three degrees of freedom to allow the robot 12 to move in any direction.
The robot 12 may have a pedestal assembly 114 that supports the camera 38 and the monitor 40. The pedestal assembly 114 may have two degrees of freedom so that the camera 26 and monitor 24 can be swiveled and pivoted as indicated by the arrows.
As shown in Figure 5 the holonomic platform 110 may include three roller assemblies 120 that are mounted to a base plate 121. The roller assemblies 120 allow for movement in any direction.
The robot housing 112 may include a bumper 122. The bumper 122 may be coupled to optical position sensors 123 that detect when the bumper 122 has engaged an object. After engagement with the object the robot can determine the direction of contact and prevent further movement into the object.
Figure 6 shows an embodiment of a roller assembly 120. Each assembly 120 may include a drive ball 124 that is driven by a pair of transmission rollers 126. The assembly 120 includes a retainer ring 128 and a plurality of bushings 130 that allow the ball 124 to rotate but prevent movement in a z direction.
The transmission rollers 126 are coupled to a motor assembly 132. The assembly 132 corresponds to the motor 88 shown in Fig. 3. The motor assembly 132 includes an output pulley 134 attached to a motor 136. The output pulley 134 is coupled to a pair of ball pulleys 138 by a drive belt 140. The ball pulleys 138 are attached to drive pins 142 that are attached to a transmission bracket 144. The transmission rollers 126 are attached to a transmission bracket 144 by a roller pin 146. Rotation of the output pulley 134 rotates the ball pulleys 138. Rotation of the ball pulleys 138 cause the transmission rollers 126 to rotate and spin the ball 124 through frictional forces. Spinning the ball 124 will move the robot 12. The drive balls 126 are out of phase so that one of the balls 126 is always in contact with ball 124. The roller pin 146 and bracket 144 allow the transmission rollers 126 to freely spin and allow orthogonal directional passive movement when one of the other roller assemblies 120 is driving and moving the robot 12.
As shown in Figure 7, the pedestal assembly 114 may include a motor 150 that is coupled to a gear 152 by a belt 154. The gear 152 is attached to a bushing 156. The bushing 156 is attached to an arm 158 that is coupled to the camera 38 and monitor 40 by a bracket 160. Activation of the motor 150 rotates the gear 152 and causes the camera 38 and monitor 40 to spin about a spin axis (see also Fig. 4) as indicated by the arrows 4. The motor 150 provides a fourth degree of freedom for the camera 38 and the monitor 40.
As shown in Figure 8, the assembly 114 may further include a tilt motor 162 within the arm 158 that can cause the monitor 40 and camera 38 to pivot about a pivot axis as indicated by the arrows 5 (see also Figs. 4 and 7) . The pivot axis may intersect the spin axis so that the assembly 114 functions like a neck that can turn the camera 38 side to side, and up and down.
The tilt motor 162 may rotate a worm 164 that rotates a worm gear 166. The pin 168 is rigidly attached to both the worm gear 166 and the bracket 160 so that rotation of the gear 166 pivots the camera 38 and the monitor 40. The bracket 160 may have a counterweight 170 to counter the weight of the camera 38 and monitor 40. The camera 38 may also include a zoom feature to provide yet another degree of freedom for the operator. The motor 162 provides a fifth degree of freedom for the camera 38 and the monitor 40. Although motors 150 and 162 are shown and described, it is to be understood that other actuators could be implemented into the robot 12.
Figure 9 shows a robot head 200 that can both pivot and spin the camera 38 and the monitor 40. The robot head 200 can be similar to the robot 12 but without the platform 110. The robot head 200 may have the same mechanisms and parts to both pivot the camera 38 and monitor 40 about the pivot axis 4, and spin the camera 38 and monitor 40 about the spin axis 5. The pivot axis may intersect the spin axis. Having a robot head 200 that both pivots and spins provides a wide viewing area.
In operation, the robot 12 or robot head may be placed in a home or a facility where one or more patients are to be monitored and/or assisted. The facility may be a hospital or a residential care facility. By way of example, the robot 12 may be placed in a home where a health care provider may monitor and/or assist the patient. Likewise, a friend or family member may communicate with the patient. The cameras and monitors at both the robot/robot head and remote control station allow for teleconferencing between the patient and the person at the remote station.
The robot 12 can be maneuvered through the home or facility by manipulating the input device 32 at the remote station 16.
The five degrees of freedom in the robot 12 allow the operator at the remote station 16 to obtain any desired viewing angle. The robot 12 may have autonomous movement. For example, the robot 12 may be programmed to automatically move to a patients room at a certain time to dispense drugs located in a drawer (not shown) without input from the remote station 16. The robot 12 can be programmed to monitor and/or assist a patient 24 hours a day, 7 days a week. Such a monitoring capability is enhanced by the autonomous recharging function of the robot.
While certain exemplary embodiments have been described and shown in the accompanying drawings, it is to be understood that such embodiments are merely illustrative of and not restrictive on the broad invention, and that this invention not be limited to the specific constructions and arrangements shown and described, since various other modifications may occur to those ordinarily skilled in the art.

Claims

CLAIMSWhat is claimed is:
1. A robot, comprising:
a housing;
a platform that is attached to said housing and has
three degrees of freedom;
a camera coupled to said housing;
a monitor coupled to said housing;
a first device that moves said camera in a fourth
degree of freedom; and,
a second device that moves said camera in a fifth
degree of freedom.
2. The robot of claim 1, wherein said first device
moves said monitor.
3. The robot of claim 1, wherein said second device
moves said monitor.
4. The robot of claim 1, wherein said platform is a
holonomic platform.
5. The robot of claim 1, wherein said camera pivots
about a pivot axis .
.
6. The robot of claim 1, wherein said camera spins
about a spin axis.
7. The robot of claim 1, wherein the pivot axis
intersects the spin axis.
8. The robot of claim 1, further comprising a
wireless transceiver coupled to said housing.
9. The robot of claim 1, wherein said first and
second devices each include an electric motor.
10. A robot, comprising:
a housing;
a platform that is attached to said housing and has
three degrees of freedom;
a camera coupled to said housing;
a monitor coupled to said housing;
first movement means for moving said camera in a fourth
degree of freedom; and, second movement means for moving said camera in a fifth
degree of freedom.
11. The robot of claim 10, wherein said first movement
means moves said monitor.
12. The robot of claim 10, wherein said second
movement means moves said monitor.
13. The robot of claim 10, wherein said platform is a
holonomic platform.
14. The robot of claim 10, wherein said camera pivots
about a pivot axis.
15. The robot of claim 10, wherein said camera spins
about a spin axis.
16. The robot of claim 10, wherein the pivot axis
intersects the spin axis.
17. The robot of claim 10, further comprising a
wireless transceiver coupled to said housing.
18. The robot of claim 10, wherein said first and
second movement means each include an electric motor.
19. A robot, comprising:
a housing;
a platform that is attached to said housing and has
three degrees of freedom;
a camera coupled to said housing so that said camera
can pivot about a pivot axis and spin about a spin axis;
a monitor coupled to said housing;
a first actuator coupled to said housing and said
camera; and,
a second actuator coupled to said housing and said
camera.
20. The robot of claim 19, wherein said first actuator
is an electric motor.
21. The robot of claim 19, wherein said second
actuator is an electric motor.
22. The robot of claim 19, .wherein said platform is a
holonomic platform.
23. The robot of claim 19, wherein the pivot axis
intersects the spin axis.
24. The robot of claim 19, further comprising a
wireless transceiver coupled to said housing.
25. The robot of claim 19, wherein said first and
second actuators are coupled to said monitor.
26. A method for operating a robot, comprising:
moving a robot along a surface in three degrees of
freedom, the robot having a camera and a monitor;
moving the camera of the robot in a fourth degree of
freedom; and,
moving the camera in a fifth degree of freedom of the
robot.
27. The method of claim 26, wherein the fourth degree
of freedom is pivoting the camera about a pivot axis and the fifth degree of freedom is spinning the camera about a
spin axis.
28. The method of claim 26, wherein the monitor moves
in the fourth and fifth degrees of freedom.
29. The method of claim 26, further comprising
wirelessly transmitting instructions to the robot.
30. A robotic system, comprising:
a remote station; and,
a robot coupled to said remote station, said robot
including a platform that has three degrees of freedom and
a camera and a monitor, said camera can move in a fourth
degree of freedom and a fifth degree of freedom.
31. The robot system of claim 30, wherein said remote
station includes a computer.
32. The robot system of claim 31, wherein said remote
station includes an input device.
33. The robot system of claim 30, wherein said robot
includes a wireless transceiver.
34. The robot system of claim 33, further comprising a
base station coupled to said wireless transceiver and said
remote station.
35. The robot system of claim 30, wherein said monitor
moves in the fourth and fifth degrees of freedom.
36. A robot head, comprising:
a housing;
a camera coupled to said housing so that said camera
can pivot about a pivot axis and spin about a spin axis;
a monitor coupled to said housing;
a first actuator coupled to said housing and said
camera; and,
a second actuator coupled to said housing and said
camera.
37. The robot head of claim 36, wherein said first
actuator is an electric motor.
38. The robot head of claim 36, wherein said second
actuator is an electric motor.
39. The robot head of claim 36, wherein the pivot axis
intersects the spin axis.
40. The robot head of claim 36, further comprising a
wireless transceiver coupled to said housing.
41. The robot head of claim 36, wherein said monitor
pivots about the pivot axis and spins about the spin axis.
42. A robot head, comprising:
a housing;
a camera coupled to said housing;
a monitor coupled to said housing;
first movement means for pivoting said camera about a
pivot axis; and,
second movement means for spinning said camera about a
spin axis.
43. The robot head of claim 42, wherein said first
movement means pivots said monitor.
44. The robot head of claim 42, wherein said second
movement means spins said monitor.
45. The robot head of claim 42, wherein the pivot axis
intersects the spin axis.
46. The robot head of claim 42, further comprising a
wireless transceiver coupled to said housing.
47. The robot head of claim 42, wherein said first and
second movements means include an electric motor. _
48. A method for operating a robot head, comprising:
pivoting a camera of a robot head about a pivot axis,
the robot head also having a monitor; and,
spinning the camera of the robot head about a spin
axis.
49. The method of claim 48, further comprising
pivoting and spinning the monitor. ,
50. The method of claim 48, further comprising
wirelessly transmitting instructions to the robot.
51. A robotic system, comprising:
a remote station; and, a robot head coupled to said remote station, said robot
head including a camera and a monitor, said camera can
pivot about a pivot axis and spin about a spin axis.
52. The robot system of claim 51, wherein said remote
station includes a computer.
53. The robot system of claim 52, wherein said remote
station includes an input device.
54. The robot system of claim 51, wherein said robot
head includes a wireless transceiver.
55. The robot system of claim 54, further comprising a
base station coupled to said wireless transceiver and said
remote station.
56. The robot system of claim 51, wherein said monitor
pivots about the pivot axis and spins about the spin axis.
PCT/US2004/000744 2003-01-15 2004-01-12 Five degrees of freedom mobile robot WO2004065073A2 (en)

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EP04701544A EP1594660A4 (en) 2003-01-15 2004-01-12 Five degrees of freedom mobile robot
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US44058603P 2003-01-15 2003-01-15
US60/440,586 2003-01-15
US10/439,122 US7158859B2 (en) 2003-01-15 2003-05-14 5 degrees of freedom mobile robot
US10/439,122 2003-05-14

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WO2004065073A8 (en) 2008-04-17
US7158859B2 (en) 2007-01-02
US20040138547A1 (en) 2004-07-15
JP2006524578A (en) 2006-11-02
EP1594660A2 (en) 2005-11-16
WO2004065073A3 (en) 2007-12-13

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