CN100404004C - Interior piezoelectric ceramic intermittent electricity supply device of implantation joint - Google Patents
Interior piezoelectric ceramic intermittent electricity supply device of implantation joint Download PDFInfo
- Publication number
- CN100404004C CN100404004C CNB2005101306301A CN200510130630A CN100404004C CN 100404004 C CN100404004 C CN 100404004C CN B2005101306301 A CNB2005101306301 A CN B2005101306301A CN 200510130630 A CN200510130630 A CN 200510130630A CN 100404004 C CN100404004 C CN 100404004C
- Authority
- CN
- China
- Prior art keywords
- piezoelectric ceramic
- electricity supply
- circuit device
- energy storage
- circuit
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/03—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0031—Implanted circuitry
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/48—Operating or control means, e.g. from outside the body, control of sphincters
- A61F2/482—Electrical means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0204—Operational features of power management
- A61B2560/0214—Operational features of power management of power generation or supply
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
- A61B5/4528—Joints
Abstract
The present invention relates to a piezoelectric ceramic intermittent electricity supply device in an implantation joint, particularly to the design of a piezoelectric ceramic electricity supply circuit and the design of a low power consumption voltage regulation circuit. The present invention belongs to the technical field of a piezoelectric ceramic electricity supply device in a medical implantation joint. The electricity supply device comprises a piezoelectric ceramic device, a rectification circuit device, an energy storage circuit device and a voltage regulator. After electrical current generated when piezoelectric ceramics is pressed passes through a rectification circuit, energy is stored into an energy storage circuit by a technique which converts energy generated by the piezoelectric ceramics under the condition of pressure into electrical energy. An energy storage capacitor supplies voltage to a voltage regulation circuit, and stable voltage is outputted by the voltage regulation circuit to be used for the work of subsequent circuits. Due to the fact that the pressed time of the piezoelectric ceramic device positioned in an implantation joint is discontinuous, the electricity supply mode of the device is also in an intermittent mode. The present invention provides an effective electricity supply mode for realizing a bidirectional digital wireless pressure monitoring system of the implantation joint of an organism.
Description
Technical field
The present invention relates to a kind of interior piezoelectric ceramic intermittent electricity supply device of implantation joint, relate in particular to design of piezoelectric ceramics power supply circuits and the design of low power consumption voltage regulating circuit, belong to medical embedded intraarticular piezoelectric ceramics electric supply installation technical field.
Background technology
The limbs permanent disability is one of important diseases that influences people with disability quality of life, and artificial joint and artifucial limb are the important means that rebulids motion function for the people of joint injury.Behind the artificial joint implant into body, be under the long-term work state, adopt integrated circuit technique between the human body implantation joint and the external world, to set up the physical channel of a signal transmission, situations such as the working condition of implantation joint, pressure, dislocation are carried out earlier detection, helping the doctor to pinpoint the problems early and diagnose, is an effective means that reduces patient's misery.
Gather the pressure data of implantation joint, need when implantation joint bears the situation of pressure, utilize under integrated circuit in it preserves pressure data.In order to realize the collection of data, at first provide working power for integrated circuit.Because the space is narrow and small in the implantation joint, it is unrealistic to place battery, and the life-span of battery is limited, and therefore the working life of implantation joint must adopt other power supply mode generally about 20 years.
Implantation joint can produce pressure in the daily active procedure of people; and piezoelectric ceramics can produce electric current under pressure condition; utilize this characteristic that piezo ceramic element is placed in the implantation joint; the electric current that they are produced under pressure condition is at first through over commutation and through the energy-storage travelling wave tube energy storage, then through voltage regulator circuit output burning voltage for for the integrated circuit power supply.
At present, the applicant does not also see domestic research about electric supply installation in the implantation joint.
Summary of the invention
Of the present invention being at present adopted piezoelectric ceramic device in implantation joint, utilize its energy that under stress produces to power for integrated circuit, thereby the collection that realizes pressure data is in time diagnosed patient's implantation joint to help the doctor.
Interior piezoelectric ceramic intermittent electricity supply device of implantation joint is characterized in that, this electric supply installation comprises following four parts:
(1) piezoelectric ceramic device places in the implantation joint, comprises 3 piezo ceramic elements, and their under stress produce on the one hand electric current, and they are also as pressure transducer on the other hand, the transmission pressure data; Three outfans of piezo ceramic element and three inputs of following rectification circuit device link to each other;
(2) rectification circuit device, the electric current that is used for piezo ceramic element is under stress produced carries out rectification.Rectification circuit device comprises three diode bridge rectification circuits, and the every road electric current that is respectively input carries out rectification, and alternating current is converted to unidirectional current; The input of the output termination energy storage circuit device of rectification circuit device;
(3) the energy storage circuit device is used for storage of electrical energy, comprises a jumbo electrochemical capacitor, and charging process by electrochemical capacitor and discharge process are the subsequent conditioning circuit power supply; The input of its output and voltage regulator links to each other;
(4) voltage regulator, being used to regulate input voltage output burning voltage is the load power supply.
The present invention proposes a kind of medical embedded joint interior piezoelectric ceramic intermittent electricity supply device, it is a kind of technology of utilizing power conversion that piezoelectric ceramics produces for electric energy under pressure condition, and device comprises piezoelectric ceramic device, rectification circuit, energy-storage travelling wave tube electric capacity and voltage regulator circuit.The electric current that produces during the piezoelectric ceramics pressurized stores energy in the energy storage circuit through behind the rectification circuit, and storage capacitor provides voltage to voltage regulator circuit, and the stable voltage of voltage regulator circuit output supplies subsequent conditioning circuit work.Because it is discontinuous being positioned at the piezoelectric ceramic device pressurized time of implantation joint, so the device power supply mode also is step.
Utilization of the present invention places the piezoelectric ceramics in the implantation joint under stress to produce electric energy and powers for integrated circuit through over commutation, energy storage and voltage regulator, like this for the effective power supply mode that provides of bi-directional digital wireless pressure monitoring system for biology implantation joint is provided.
Description of drawings
Fig. 1 is a logical structure sketch map of the present invention.
Fig. 2 is a piezo ceramic element sketch map of the present invention.
Fig. 3 is storage capacitor work sketch map among the present invention.
The specific embodiment
Fig. 1 is a logical structure sketch map of the present invention.Wherein 1 is that piezoelectric ceramic device, 2 is that rectification circuit device, 3 is that energy storage circuit device, 4 is voltage regulator.Three piezo ceramic elements produce electric current under pressure condition, the outfan of piezoelectric ceramic device (1) links to each other with the input of rectification circuit device (2), and the outfan of rectification circuit device (2) links to each other with the input of energy storage circuit device (3); The outfan of energy storage circuit device (3) links to each other with the input of voltage regulator arrangement (4).
Fig. 2 is the sketch map of piezo ceramic element of the present invention, wherein 5 is pressure dispersed metal plate, 6 is bearing, 7 is piezo ceramic element, the element number can be decided as required, be applied in and can adopt 4 in the bi-directional digital wireless pressure monitoring system for biology implantation joint, the energy of the voluminous more life of number is big more.3 piezo ceramic elements have been comprised among this figure.Pressure dispersed metal plate (5) is in the top, and piezo ceramic element (7) is in the centre, and bearing (6) is positioned at below.Pressure from the top is distributed on each piezo ceramic element through excess pressure dispersed metal plate (5), and piezo ceramic element produces electric current and can export by lead under pressure.Bearing (6) supports whole joint.Lead can extract by bearing (6).
Fig. 3 is storage capacitor work sketch map among the present invention.Wherein 8 is the equivalent capacity C of piezo ceramic device
p, 9 is the storage capacitor C in the energy storage circuit
s, 10 are circuit load.The equivalent capacity of piezo ceramic device (8) links to each other with load (10) with storage capacitor (9) parallel connection in the energy storage circuit again.
Provided storage capacitor C below
sC is worked as in the selection of size
s=C
pThe time, C
sCan obtain maximum energy, wherein C
pEquivalent capacity for piezo ceramic device.The electric charge size that storage capacitors obtains is:
ΔQ＝C
s·(V
1-V
2) (1)
Wherein Δ Q is C
sIn its both end voltage from V
1To V
2(V
1＞V
2) the electric charge size that discharges in the change procedure, and electric charge also can be described by following formula
ΔQ＝I·Δt (2)
Wherein Δ t is from V by voltage
1To V
2Change the time of experience, I is the size of current that produces this section period.Can obtain according to formula (1) and formula (2):
Can obtain C according to formula (3)
sBoth end voltage can provide the time of electric current for subsequent conditioning circuit when changing.Because storage capacitor C
sItself exists charging and discharge process, so the power supply process of piezoelectric ceramics is step.
Piezoelectric ceramic device (1) comprises 3 piezo ceramic elements (7), pressure dispersed metal plate (5) and bearing (6), piezo ceramic element (7) is that the sensor transmissions pressure data again can be in produce power under the pressure, pressure is converted into electric energy by piezoelectric ceramic device (1) and exports to rectification circuit (2), described rectification circuit (2) adopts the diode bridge rectification circuit, and the electric current that each piezo ceramic element (7) produces all carries out the bridge rectification through a diode bridge rectification circuit.Flow to energy storage circuit device (3) after the rectification; Described energy storage circuit device (3) is jumbo electrochemical capacitor (9), the electric current that piezoelectric ceramic device (1) produces is its charging, when the energy in the storage capacitor (9) is enough to for load (10) work, storage capacitor (9) then discharges, and promptly storage capacitor (9) is in the charging and two processes of discharging.When storage capacitor (9) size equaled the equivalent capacity (8) of piezoelectric ceramics piezoelectric ceramic device (1), storage capacitor (9) can be stored ceiling capacity; Described voltage regulator (4) is used for the voltage that control capacittance input comes, and export stable voltage confession loaded work piece.
The present invention is a kind of pressure that is used in the implantation joint, produces when utilizing joint motion carries out intermittent power supply through piezo ceramic device a device, utilize power conversion that piezoelectric ceramics produces technology under pressure condition, contain piezoelectric ceramic device, full-wave bridge rectification circuit, energy-storage travelling wave tube electric capacity and voltage regulator circuit for electric energy.Store energy in the storage capacitor after the electric current process full-wave bridge rectification that produces during the piezoelectric ceramics pressurized, storage capacitor provides voltage to voltage regulator circuit, and the stable voltage of voltage regulator circuit output supplies subsequent conditioning circuit work.For the effective power supply mode that provides of bi-directional digital wireless pressure monitoring system for biology implantation joint is provided.
Claims (2)
1. interior piezoelectric ceramic intermittent electricity supply device of implantation joint is characterized in that, this electric supply installation comprises following four parts:
(1) piezoelectric ceramic device places in the implantation joint, comprises 3 piezo ceramic elements, and their under stress produce on the one hand electric current, and they are also as pressure transducer on the other hand, the transmission pressure data; Each piezo ceramic element has an outfan, and promptly three inputs of three of piezoelectric ceramic device outfans and following rectification circuit device link to each other;
(2) rectification circuit device, the electric current that is used for piezo ceramic element is under stress produced carries out rectification; Rectification circuit device comprises three diode bridge rectification circuits, and the every road electric current that is respectively input carries out rectification, and alternating current is converted to unidirectional current; The input of the output termination energy storage circuit device of rectification circuit device;
(3) the energy storage circuit device is used for storage of electrical energy, and charging process by the energy storage circuit device and discharge process are the subsequent conditioning circuit power supply; The outfan of energy storage circuit device links to each other with the input of voltage regulator;
(4) voltage regulator is used to regulate input voltage, the output burning voltage, and described voltage regulator outfan links to each other with load.
2. interior piezoelectric ceramic intermittent electricity supply device of implantation joint according to claim 1 is characterized in that, described energy storage circuit device is a jumbo electrochemical capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101306301A CN100404004C (en) | 2005-12-16 | 2005-12-16 | Interior piezoelectric ceramic intermittent electricity supply device of implantation joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101306301A CN100404004C (en) | 2005-12-16 | 2005-12-16 | Interior piezoelectric ceramic intermittent electricity supply device of implantation joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1806777A CN1806777A (en) | 2006-07-26 |
| CN100404004C true CN100404004C (en) | 2008-07-23 |
Family
ID=36838990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101306301A Active CN100404004C (en) | 2005-12-16 | 2005-12-16 | Interior piezoelectric ceramic intermittent electricity supply device of implantation joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100404004C (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4499394A (en) * | 1983-10-21 | 1985-02-12 | Koal Jan G | Polymer piezoelectric sensor of animal foot pressure |
| JPH06213743A (en) * | 1993-01-14 | 1994-08-05 | Yamatake Honeywell Co Ltd | Semiconductor pressure sensor |
| CN1315846A (en) * | 1998-09-04 | 2001-10-03 | 沃尔夫研究有限公司 | Medical implant system |
| US6431175B1 (en) * | 1997-12-30 | 2002-08-13 | Remon Medical Technologies Ltd. | System and method for directing and monitoring radiation |
| US6486588B2 (en) * | 1997-12-30 | 2002-11-26 | Remon Medical Technologies Ltd | Acoustic biosensor for monitoring physiological conditions in a body implantation site |
| CN1409889A (en) * | 1999-11-12 | 2003-04-09 | Usc株式会社 | Piezoelectric generating apparatus |
| WO2004026129A1 (en) * | 2002-07-02 | 2004-04-01 | Medinnova Sf | System for read-out of pressure |
| US20050179341A1 (en) * | 2004-01-14 | 2005-08-18 | Brantner Paul C. | Method and apparatus for a high output sensor system |
-
2005
- 2005-12-16 CN CNB2005101306301A patent/CN100404004C/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4499394A (en) * | 1983-10-21 | 1985-02-12 | Koal Jan G | Polymer piezoelectric sensor of animal foot pressure |
| JPH06213743A (en) * | 1993-01-14 | 1994-08-05 | Yamatake Honeywell Co Ltd | Semiconductor pressure sensor |
| US6431175B1 (en) * | 1997-12-30 | 2002-08-13 | Remon Medical Technologies Ltd. | System and method for directing and monitoring radiation |
| US6486588B2 (en) * | 1997-12-30 | 2002-11-26 | Remon Medical Technologies Ltd | Acoustic biosensor for monitoring physiological conditions in a body implantation site |
| CN1315846A (en) * | 1998-09-04 | 2001-10-03 | 沃尔夫研究有限公司 | Medical implant system |
| CN1409889A (en) * | 1999-11-12 | 2003-04-09 | Usc株式会社 | Piezoelectric generating apparatus |
| WO2004026129A1 (en) * | 2002-07-02 | 2004-04-01 | Medinnova Sf | System for read-out of pressure |
| US20050179341A1 (en) * | 2004-01-14 | 2005-08-18 | Brantner Paul C. | Method and apparatus for a high output sensor system |
Non-Patent Citations (4)
| Title |
|---|
| 微电子技术在生物医学中的应用与发展. 谢翔，张春，王志华.电路与系统学报，第8卷第2期. 2003 |
| 微电子技术在生物医学中的应用与发展. 谢翔，张春，王志华.电路与系统学报，第8卷第2期. 2003 * |
| 生物医学中的植入式电子系统的现状与发展. 谢翔，张春，王志华.电子学报，第32卷第3期. 2004 |
| 生物医学中的植入式电子系统的现状与发展. 谢翔，张春，王志华.电子学报，第32卷第3期. 2004 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1806777A (en) | 2006-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tran et al. | High-efficient energy harvester with flexible solar panel for a wearable sensor device | |
| CN1376327A (en) | Voltage control circuitry for charging output capacitor | |
| WO2005043642A3 (en) | System and methods for charging batteries | |
| CN106712243A (en) | Self-powered system of wearable device | |
| CN103259323B (en) | Based on the WSN node self-contained electric system of solar-wind energy complementation | |
| Bridgeless | Vibration based piezoelectric energy harvesting utilizing bridgeless rectifier circuit | |
| Rahman et al. | Design of autonomous micro-solar powered energy harvesting system for self-powered batteries-less wireless sensor mote | |
| CN101282044A (en) | Matching circuit of solar battery as well as implementing method thereof | |
| CN100404004C (en) | Interior piezoelectric ceramic intermittent electricity supply device of implantation joint | |
| Mohsen et al. | A self-powered wearable sensor node for IoT healthcare applications | |
| CN111879825B (en) | Gas-sensitive sensing device, system and gas detection method | |
| CN102357034B (en) | Low-power consumption current excitation source for electrical impedance imaging | |
| CN103892820A (en) | Implantable wireless passive bladder pressure detection system | |
| DE60212023D1 (en) | Implantable power management system | |
| CN104826232A (en) | Vibration energy supply system for cardiac pacemaker | |
| Jiang et al. | Low-power design of a self-powered piezoelectric energy harvesting system | |
| Gyanchandani et al. | A self-powered wearable device using the photovoltaic effect for human heath monitoring | |
| CN106160106B (en) | A kind of wearable device and design method based on solar cell for supplying power | |
| CN114285132A (en) | Low-power consumption energy acquisition circuit | |
| CN204062796U (en) | Interior illuminator based on piezo-electric generating and the intelligent lighting system for it | |
| CN108462404A (en) | Intelligent power supply system based on piezoelectric ceramics vibration environment collection of energy | |
| CN204190502U (en) | A kind of energy collecting device of microelectronic component | |
| CN208608764U (en) | A kind of faint electricity energy harvester and intelligent wearable device | |
| CN207994954U (en) | Intelligent power supply system based on piezoelectric ceramics vibration environment collection of energy | |
| CN204723598U (en) | A kind of cardiac pacemaker vibration energy supplying system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161223 Address after: 100000 Beijing, Zhichun Road, No. 108, building 2301, room 2, No. Patentee after: BEIJING YIMAI MEDICAL TECHNOLOGY CO., LTD. Address before: 100084 Beijing Beijing 100084-82 mailbox Patentee before: Qinghua UNiversity |