WO2014124585A1

WO2014124585A1 - Patient guardianship system

Info

Publication number: WO2014124585A1
Application number: PCT/CN2013/090734
Authority: WO
Inventors: 徐传毅
Original assignee: 纳米新能源（唐山）有限责任公司
Priority date: 2013-02-18
Filing date: 2013-12-27
Publication date: 2014-08-21
Also published as: CN203290910U

Abstract

A patient guardianship system comprises at least one nano friction sensor (1), a signal processor (2) connected to the at least one nano friction sensor (1), and a display (3) and a communication device (4) that are connected to the signal processor (2). The nano friction sensor (1) comprises: a first electrode (11), a first high-molecular polymer insulation layer (12), and a second electrode (13) that are disposed in a successive stack-up manner, the first electrode (11) and the second electrode (13) being signal output electrodes of the nano friction sensor (1). The nano friction sensor (1) is used to monitor a behavior situation of a patient. When the patient turns over, coughs, or shakes, or the like, the nano friction sensor senses opposite electric charges on the first electrode (11) and the second electrode (13), thereby causing an electronic potential difference between the first electrode (11) and the second electrode (13), and generating an electric signal. A behavior situation of the patient can be obtained by monitoring the electric signal.

Description

Patient monitoring system

The invention relates to the field of electronic information technology, and in particular to a patient monitoring system.

Background technique

Currently, systems for patient monitoring generally do not provide convenient, continuous, day and night monitoring. For example, in a general care unit of a hospital, a group of nurses typically patrol the patient individually at 3 or 4 hour intervals to obtain key signs such as respiratory rate and heart rate for monitoring purposes. However, such intermittent monitoring can lead to a lack or delay in diagnosis, which can have adverse consequences for the patient, especially in very weak patients whose condition may change rapidly.

For example, in order to monitor a critically ill patient, it is necessary to timely and effectively understand the activities such as waking, moving, falling on the bed, and then implementing appropriate treatment or care to ensure the safety of the patient and subsequent treatment in a timely manner. This is a very important job for patients, families and hospitals. Due to the rapid changes in the condition of critically ill patients, it is easier to miss the best rescue opportunity by taking the above intermittent monitoring method, resulting in irreparable consequences.

It can be seen that the prior art monitoring method can only provide intermittent monitoring, and cannot provide continuous and day-night monitoring of the patient. Summary of the invention

The present invention provides a patient monitoring system for solving the problem that the prior art monitoring mode can only provide intermittent monitoring and cannot provide continuous and day-night monitoring of the patient.

A patient monitoring system comprising: at least one nano-friction sensor, a signal processor coupled to the at least one nano-friction sensor, and a display and communication device respectively coupled to the signal processor, wherein the nano-friction sensor The method includes: a first electrode disposed in a stack, a first polymer insulating layer, and a second electrode; wherein the first electrode and the second electrode are signal output electrodes of the nano friction sensor.

In the embodiment of the invention, the nano-friction sensor is used to monitor the movement of the patient, in the patient When the action of turning over, coughing or shaking is performed, due to the friction between the first polymer insulating layer and the second electrode, an opposite charge is induced on the first electrode and the second electrode, respectively, resulting in the first electrode and A potential difference is generated between the second electrodes to generate a voltage or current signal, and the voltage or current signal is monitored by the signal processor to obtain the patient's motion. Wherein, the display can be used to display the monitoring result, and the communication device can be used to notify the relevant medical staff and family members, whereby the patient monitoring system can provide continuous and day-night monitoring for the patient. DRAWINGS

1 is a schematic structural diagram of a patient monitoring system according to an embodiment of the present invention;

2a and 2b respectively show a schematic perspective view and a cross-sectional structural view of a first structure of a nano-friction sensor;

3a and 3b respectively show a schematic perspective view and a cross-sectional structural view of a second structure of the nano friction sensor;

4a and 4b respectively show a schematic perspective view and a cross-sectional structural view of a third structure of the nano friction sensor;

5a and 5b respectively show a schematic perspective view and a cross-sectional structural view of the nano-friction sensor when it is circular;

Figure 6 is a schematic view showing the structure of eight nano-friction sensors arranged in sequence;

Figure 7 shows a schematic structural diagram of a signal processor;

FIG. 8 is still another schematic structural diagram of a patient monitoring system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION In order to fully understand the objects, features and advantages of the present invention, the present invention will be described in detail by the following specific embodiments, but the invention is not limited thereto.

FIG. 1 is a schematic structural diagram of a patient monitoring system according to an embodiment of the present invention, as shown in FIG. 1 The patient monitoring system comprises: at least one nano-friction sensor 1, a signal processor 2 connected to the at least one nano-friction sensor 1, and a display 3 and a communication device 4 respectively connected to the signal processor 2. The nano-friction sensor 1 includes: a first electrode 11 , a first polymer insulating layer 12 , and a second electrode 13 which are sequentially stacked; wherein the first electrode 11 and the second electrode 13 are nanometers The signal output electrode of the friction sensor.

In the embodiment of the present invention, the nano-friction sensor is used to monitor the movement of the patient. When the patient performs a turning, coughing or shaking motion, the friction between the first polymer insulating layer and the second electrode is respectively A charge of the opposite polarity is induced on the first electrode and the second electrode, causing a potential difference between the first electrode and the second electrode to generate a voltage or current signal in the external circuit, and the voltage or current signal is monitored by the signal processor to obtain The patient's movements. Wherein, the display can be used to display the monitoring result, and the communication device can be used to notify the relevant medical staff and family members, whereby the patient monitoring system can provide continuous and day-night monitoring for the patient.

Among them, the nano friction sensor is essentially a nano friction generator. When the patient is active, the nano-friction sensor is squeezed and generates a voltage or current by friction, the strength of which can reflect the patient's activity.

Several possible structures of the nano-friction sensor in the embodiment of the present invention will be described in detail below with reference to the accompanying drawings:

2a and 2b respectively show a perspective structural view and a cross-sectional structural view of a first structure of the nano friction sensor. The nano-friction sensor includes a first electrode 11, a first polymer insulating layer 12, and a second electrode 13, which are sequentially stacked. Specifically, the first electrode 11 is disposed on the first side surface of the first polymer insulating layer 12; and the second side surface of the first polymer insulating layer 12 and the second electrode 13 The surface contacts the friction and induces a charge at the second electrode and the first electrode. Therefore, the first electrode 11 and the second electrode 13 are the signal output electrodes of the nano-friction sensor, and the signal output by the nano-friction sensor may be a current signal or a voltage signal.

In order to increase the friction generated by the nano-friction sensor when the patient is active, a micro-nano structure 20 is provided on at least one of the two faces of the first polymer-polymer insulating layer 12 and the second electrode 13 disposed oppositely (where FIG. 2b is a schematic view showing a micro-nano structure on both surfaces of the first polymer polymer insulating layer 12 and the second electrode 13 disposed oppositely. In actual cases, it may also be One of the faces has a micro-nano structure). Thereby, when the patient is active, the opposing surfaces of the first polymer insulating layer 12 and the second electrode 13 can better contact the friction and induce more at the first electrode 11 and the second electrode 13 The charge. Since the second electrode is mainly used for rubbing with the first polymer insulating layer, the second electrode may also be referred to as a friction electrode.

The following two possible implementations of the micro-nano structure are described below. In the first way, the micro/nano structure is a very small relief structure of micron or nano order. The uneven structure can increase the frictional resistance and increase the power generation efficiency, thereby improving the sensitivity of the sensor. The convex structure can be formed directly at the time of preparation, and the surface of the first polymer insulating layer can be formed into an irregular concave-convex structure by a grinding method. Specifically, the uneven structure may be a concave-convex structure of a semicircular shape, a striped shape, a cubic shape, a quadrangular pyramid shape, or a cylindrical shape. In the second mode, the micro/nano structure is a nano-scale pore structure, and the material used for the first polymer insulating layer is preferably polyvinylidene fluoride (PVDF), and the thickness thereof is 0.5-1.2 mm (preferably 1.0 mm). And a plurality of nanopores are disposed on a surface of the second electrode. The size of each nanopore, that is, the width and depth, can be selected according to the needs of the application. The preferred size of the nanopore is: 10-100 nm in width and 4-50 μηι in depth. The number of nanopores can be adjusted according to the required output current value and voltage value. Preferably, the nanopores are uniformly distributed with a pore spacing of 2-30 μηι, and more preferably an average pore spacing of 9 μηι.

The working principle of the nano-friction sensor of Figures 2a and 2b is described in detail below. When the layers of the nano-friction sensor are bent downward, the second electrode of the nano-friction sensor rubs against the surface of the first polymer-polymer insulating layer to generate an electrostatic charge, and the static charge generates the first electrode and the second electrode. The capacitance between them changes, resulting in a potential difference between the first electrode and the second electrode. Due to the existence of a potential difference between the first electrode and the second electrode, free electrons will flow from the side of the lower potential to the side of the higher potential through the external circuit, thereby forming a current in the external circuit. When the layers of the nano-friction sensor return to the original state, the internal potential formed between the first electrode and the second electrode disappears, and the equilibrium between the first electrode and the second electrode will again be reversed. The potential difference of the direction, the free electrons form a reverse current through the external circuit. By repeated friction and recovery, periodic alternating current signals can be formed in the external circuit.

The material used for the first electrode may be indium tin oxide, graphene, silver nanowire film, metal or alloy, wherein the metal may be gold, silver, platinum, palladium, aluminum, nickel, copper, titanium, chromium, selenium, iron, Manganese, molybdenum, tungsten or vanadium; alloys may be aluminum alloys, titanium alloys, magnesium alloys, niobium alloys, copper alloys, alloys, manganese alloys, nickel alloys, lead alloys, tin alloys, cadmium alloys, niobium alloys, indium alloys, Gallium alloy, tungsten alloy, molybdenum alloy, niobium alloy or niobium alloy. The material used for the second electrode is a metal or an alloy, wherein the metal is gold, silver, platinum, palladium, aluminum, nickel, copper, titanium, chromium, selenium, iron, manganese, molybdenum, tungsten or vanadium; the alloy is an aluminum alloy, Titanium alloy, magnesium alloy, niobium alloy, copper alloy, alloy, manganese alloy, nickel alloy, lead alloy, tin alloy, cadmium alloy, niobium alloy, indium alloy, gallium alloy, tungsten alloy, molybdenum alloy, niobium alloy or niobium alloy .

The material for the first polymer polymer insulating layer may be selected from the group consisting of polyimide film, aniline formaldehyde resin film, polyoxymethylene film, ethyl cellulose film, polyamide film, melamine formaldehyde film, polyethylene glycol butyl Acid ester film, cellulose film, cellulose acetate film, polyethylene adipate film, diallyl polyphthalate film, fiber regenerated sponge film, polyurethane elastomer film, styrene propylene copolymer Film, styrene butadiene copolymer film, rayon film, polymethyl methacrylate film, polyvinyl alcohol film, polyisobutylene film, polyethylene terephthalate film, polyvinyl butyral Any one of a film, a formaldehyde phenol condensation polymer film, a neoprene film, a butadiene propylene copolymer film, a natural rubber film, a polyacrylonitrile film, and an acrylonitrile vinyl chloride copolymer film.

According to the study by the inventors, the metal rubs against the polymer, and the metal is more likely to lose electrons. Therefore, the friction between the metal electrode and the polymer can also increase the energy output. Therefore, the above-mentioned nano-friction sensor mainly generates an electric signal by friction between the metal (second electrode) and the polymer (the first polymer-polymer insulating layer), and mainly utilizes the characteristic that the metal easily loses electrons, so that the second An induced electric field is formed between the electrode and the first polymer insulating layer to generate a voltage or a current.

3a and 3b are respectively a perspective structural view and a cross-sectional structural view of a second structure of the nano friction sensor. The nano-friction sensor includes a first electrode 11 , a first polymer insulating layer 12 , a second polymer insulating layer 14 , and a second electrode 13 which are sequentially stacked. Specifically, the first electrode 11 is disposed on the first side surface of the first polymer insulating layer 12; wherein the second electrode 13 is disposed on the first side surface of the second polymer insulating layer 14. The second side surface of the first polymer insulating layer 12 is in contact with the second side surface of the second polymer insulating layer 14 and induces electric charges at the first electrode and the second electrode. Wherein the first electrode and the second electrode are output electrodes of the nano friction sensor.

In order to increase the frictional force generated by the nano-friction sensor during the patient's activity, at least one of the two faces of the first polymer-polymer insulating layer 12 and the second polymer-polymer insulating layer 14 disposed opposite each other is provided with micro Nanostructure 20. Therefore, when the patient is active, the opposing surfaces of the first polymer insulating layer 12 and the second polymer insulating layer 14 can better contact the friction, and at the first electrode 11 and the second electrode 13 It induces more charge.

The following two implementations of the nanostructure are described below. In the first way, the nanostructure is a very small relief structure of the micrometer or nanometer scale. The uneven structure can increase the frictional resistance and increase the power generation efficiency, thereby improving the sensitivity of the sensor. The convex structure can be formed directly at the time of preparation, and the surface of the first high molecular polymer insulating layer and/or the second high molecular polymer insulating layer can be formed into an irregular concave-convex structure by a grinding method. Specifically, the uneven structure may be a concave-convex structure of a semicircular shape, a striped shape, a cubic shape, a quadrangular pyramid shape, or a cylindrical shape. The second way is that the micro/nano structure is a nano-scale pore structure. At this time, the micro-nano structure is usually only disposed on the first polymer insulating layer, and the material used for the first polymer insulating layer is preferably Polyvinylidene fluoride (PVDF) having a thickness of 0.5 to 1.2 mm (preferably 1.0 mm) and having a plurality of nanopores on the surface of the second polymer insulating layer. The size of each nanopore, that is, the width and depth, can be selected according to the needs of the application. The preferred size of the nanopore is: 10-100 nm in width and 4-50 μηι in depth. The number of nanopores can be adjusted according to the required output current value and voltage value. Preferably, the plurality of nanopores are uniformly distributed with a pore spacing of 2-30 μm, and more preferably an average pore spacing of 9 μηι.

The working principle of the nano-friction sensor of Figures 3a and 3b will be specifically described below. When the layers of the nano-friction sensor are bent downward, the first polymer-polymer insulating layer and the second polymer-polymer insulating layer in the nano-friction sensor rub against each other to generate an electrostatic charge, and the generation of the static charge causes the first The capacitance between the electrode and the second electrode changes, resulting in a potential difference between the first electrode and the second electrode. Due to the existence of a potential difference between the first electrode and the second electrode, free electrons will flow from the side of the lower potential to the side of the higher potential through the external circuit, thereby forming a current in the external circuit. When the layers of the nano-friction sensor return to the original state, the internal potential formed between the first electrode and the second electrode disappears, and the equilibrium between the first electrode and the second electrode will again be reversed. The potential difference of the direction, the free electrons form a reverse current through the external circuit. Through repeated friction and recovery, It is possible to form a periodic alternating current signal in the external circuit.

The material for the first electrode and the second electrode may be indium tin oxide, graphene, silver nanowire film, metal or alloy, wherein the metal may be gold, silver, platinum, palladium, aluminum, nickel, copper, titanium, Chromium, selenium, iron, manganese, phase, tungsten or vanadium; alloys may be aluminum alloys, titanium alloys, magnesium alloys, niobium alloys, copper alloys, alloys, manganese alloys, nickel alloys, lead alloys, tin alloys, cadmium alloys, Niobium alloy, indium alloy, gallium alloy, tungsten alloy, molybdenum alloy, milling alloy or niobium alloy.

The first polymer polymer insulating layer and the second polymer polymer insulating layer are respectively selected from the group consisting of a polyimide film, an aniline resin film, a polyoxymethylene film, an ethyl cellulose film, a polyamide film, and a melamine formaldehyde. Film, polyethylene glycol succinate film, cellulose film, cellulose acetate film, polyethylene adipate film, poly( diallyl phthalate film), fiber (recycled) sponge film , polyurethane elastomer film, styrene propylene copolymer film, styrene butadiene copolymer film, rayon film, polymethyl film, methacrylate film, polyvinyl alcohol film, polyvinyl alcohol film, polyester film , polyisobutylene film, polyurethane flexible sponge film, polyethylene terephthalate film, polyvinyl butyral film, formaldehyde phenol film, neoprene film, butadiene propylene copolymer film, natural rubber film, Any one of a polyacrylonitrile film, an acrylonitrile vinyl chloride film, and a polyethylene propylene glycol carbonate film. In order to improve the friction effect, the first polymer insulating layer and the second polymer insulating layer are usually selected from different materials.

The above-described nano-friction sensor generates an electric signal mainly by friction between a polymer (first polymer insulating layer) and a polymer (second polymer insulating layer).

4a and 4b are respectively a perspective structural view and a cross-sectional structural view showing a third structure of the nano friction sensor. The nano-friction sensor includes a first electrode 11 , a first polymer insulating layer 12 , an intermediate film layer 10 , a second polymer insulating layer 14 , and a second electrode 13 which are sequentially stacked. Specifically, the first electrode 11 is disposed on the first side surface of the first polymer insulating layer 12; wherein the first side surface of the intermediate film layer 10 is disposed on the second polymer insulation On the second side surface of the layer 14; wherein the second electrode 13 is disposed on the first side surface of the second polymer insulating layer 14; wherein, the first polymer polymer insulating layer The two side surfaces are in frictional contact with the second side surface of the intervening film layer and induce a charge at the first electrode and the second electrode; wherein the first electrode and the second electrode are output electrodes of the nano friction sensor; The intermediate film layer 10 and the first polymer insulating layer 12 The micro/nano structure 20 is disposed on at least one of the two opposite faces (wherein the microfilm structure is disposed on the surface of the intermediate film layer 10 relative to the first polymer insulating layer 12 in FIG. 4b, In this case, it may be provided only on the surface of the first polymer insulating layer 12 or both.

The first side surface of the intermediate film layer 10 (ie, the side not provided with the micro/nano structure) is fixed on the second side surface of the second polymer insulating layer 14, and the fixing method may be a thin layer of The cured polymer polymer insulating layer serves as a bonding layer, and after curing, the intermediate film layer 10 is firmly fixed to the second polymer insulating layer 14. The side of the intermediate film layer 10 having the micro/nano structure is in contact with the second side surface of the first polymer insulating layer 12 to form a frictional interface therebetween.

The specific implementation manner of the micro-nano structure described above can be referred to the implementation manners of the first two types of nano-friction sensors, and will not be described herein.

The working principle of the nano-friction sensor of Figures 4a and 4b is described in detail below. When the layers of the nano-friction sensor are bent downward, the first polymer-polymer insulating layer and the intermediate film layer in the nano-friction sensor rub against each other to generate an electrostatic charge, and the generation of the static charge causes the first electrode and the second electrode to The capacitance between them changes, resulting in a potential difference between the first electrode and the second electrode. Due to the potential difference between the first electrode and the second electrode, free electrons will flow from the side of the lower potential to the side of the higher potential through the external circuit, thereby forming a current in the external circuit. When the layers of the nano-friction sensor return to the original state, the internal potential formed between the first electrode and the second electrode disappears, and the equilibrium between the first electrode and the second electrode will again be reversed. The potential difference of the direction, the free electrons form a reverse current through the external circuit. By repeated friction and recovery, periodic alternating current signals can be formed in the external circuit.

The first polymer insulating layer, the intermediate film layer and the second polymer insulating layer in FIGS. 4a and 4b may be independently selected from transparent high polymer polyethylene terephthalate (PET) ), polydidecylsiloxane (PDMS), polystyrene (PS), polydecyl methacrylate (P匪A), Any one of a polycarbonate (PC) and a liquid crystal polymer (LCP); wherein a material of the first polymer insulating layer and the second polymer insulating layer is preferably a transparent high polymer Ethylene terephthalate (PET); wherein the material of the intermediate film layer is preferably polydimethylsiloxane (PDMS). In order to improve the friction effect, the material of the intermediate film layer is different from the first polymer insulating layer and the second polymer insulating layer.

The materials of the first polymer insulating layer, the intermediate film layer and the second polymer insulating layer described above are all transparent materials. In fact, these transparent materials can be applied not only to the nano-friction in FIGS. 4a and 4b. The sensor, and can also be applied to the nano-friction sensor of Figures 2a, 2b and 3a, 3b, namely: the first polymer insulation of the nano-friction sensor of Figures 2a, 2b and 3a, 3b The layer and the second high molecular polymer insulating layer may also be realized by the above transparent material. In addition, in addition to the above transparent material, the first polymer insulating layer and the second polymer insulating layer in the nano friction sensor of FIG. 4a and FIG. 4b can also adopt the above-mentioned FIG. 2a and FIG. 2b and the non-transparent material of the first high molecular polymer insulating layer and the second high molecular polymer insulating layer in the nano friction sensor of FIGS. 3a and 3b. That is to say, in the above-mentioned three types of nano-friction sensors, the first polymer polymer insulating layer and the second polymer polymer insulating layer can be flexibly selected from the above transparent material or non-transparent material.

The above-described nano-friction sensor generates an electrical signal mainly by friction between a polymer (first polymer insulating layer) and a polymer (intermediate film layer). Among them, the intervening film is easy to prepare and has stable performance.

In addition, according to the working principle of the nano-friction sensor, in the process of the sensor operation, the two friction surfaces need constant contact friction and separation, and the sensor can not have a good output performance when it is in the contact state or the separation state. Therefore, in order to be able to produce a sensor with excellent performance, the structure of the sensor can be improved in the present invention. For example, the three nano-friction sensors of FIGS. 2a to 4b are respectively formed into a shape-changing structure, so that the two friction surfaces are It can automatically bounce up without being stressed. Specifically, the shape change structure may be formed by using a tape bonding or a heat sealing method. The specific process may be: aligning the cross sections of the two contact faces, sealing them by tape bonding or heat sealing, and then replacing them. , so that the cross sections of the two contact faces on the other side are also aligned and bonded. For example, as shown in FIG. 2a and FIG. 2b, at least one of the second electrode and the first polymer insulating layer needs to be outwardly changed to form a convex surface, so that the second electrode and the first polymer insulating layer are Interformation Gap. This increases the friction effect and thus the performance of the sensor.

Through the one or more nano-friction sensors described above, the mechanical energy generated by the patient's activity can be converted into an electrical signal. Specifically, the cross-sectional shape of the nano-friction sensor may be set as needed, for example, may be a circular ring, a planar rectangle, or a planar polygon. When the cross-sectional shape of the nano-friction sensor is a circular ring, the three-dimensional structure and the cross-sectional structure thereof. The schematics are shown in Figures 5a and 5b, respectively. The annular nano-friction sensor shown in Figures 5a and 5b can be, for example, in the shape of a finger ring or a toe ring so that it can be worn on the patient's wrist and/or ankle to monitor the patient's hand and/or foot. Activity; Alternatively, a circular nano-friction sensor can be placed over the patient's chest to monitor the patient's chest and lung activity. Moreover, the nano-friction sensor can also be placed in the shape of a glove to be worn on the patient's hand like a glove, and the glove-shaped nano-friction sensor can also expose the finger portion of the finger for the convenience of the patient's finger movement. In addition to this, the nano-friction sensor can also be provided as a patch sensor, for example, a patch sensor that can be shaped like a band-aid, so that the patch sensor can be placed on the surface of the patient's eyelid or other body parts. Further, the nano-friction sensor may be placed on the surface of the sheet and the cover to form a sheet, a cover sensor, or the like. In short, when making nano-friction sensors, try to choose a way that is convenient for users to use and easy to manufacture and low in cost.

In addition, when the patient is in a couch for a long time, a plurality of planar rectangular nano-friction sensors can be disposed under the body where the patient lies. For example, FIG. 6 shows eight nano-friction sensors arranged in order to monitor different body parts of the patient. Schematic diagram of the activity.

In particular, when the nano-friction sensors are placed at different locations, the electrical signals correspondingly represent different meanings. For example, an electrical signal generated by a sensor disposed near the patient's chest represents a patient's heartbeat signal, while an electrical signal generated by a sensor disposed near the patient's right foot may also represent a patient's heartbeat signal, but near the right foot. The quality of the electrical signal produced by the sensor is typically lower than the quality of the electrical signal produced by the sensor near the chest. In addition, the electrical signal generated by the sensor placed at the wrist or ankle may represent the pulse signal of the patient, and the electrical signal generated by the sensor disposed under the patient's body represents the activity of the corresponding body part of the patient.

In order to monitor the electrical signals generated by the one or more nano-friction sensors described above to understand the patient's activity, the patient monitoring system of the present invention further includes signal processing coupled to one or more of the nano-friction sensors 1 described above. The device 2 is configured to analyze and process an electrical signal generated by the nano friction sensor. The details of the structure and work of the signal processor 2 are described in detail below. The principle.

As shown in FIG. 7, the signal processor further includes: a filter circuit 21, an analog-to-digital conversion circuit 22 connected to an output terminal of the filter circuit 21, and a central processing unit connected to an output terminal of the analog-digital conversion circuit 22. twenty three. The filter circuit 21 is configured to filter the interference signal existing in the electrical signal output by the nano friction sensor; the analog to digital conversion circuit 22 is configured to sample the analog electrical signal output by the filter circuit to convert it into a digital electrical signal. It is thus provided to the central processing unit 23; the central processing unit 23 is configured to perform a calculation process on the digital electrical signals output from the analog to digital conversion circuit.

The central processing unit 23 further includes: a threshold setter for setting a signal amplitude threshold and a signal time interval threshold, and a threshold comparator for comparing the signal amplitude and the signal time interval. Wherein, when the number of the nano-friction sensors is plural, the threshold of the signal amplitude set by the threshold setter includes: a first amplitude threshold reflecting the amplitude change of the same signal output by the same nano-friction sensor in different time periods, and reflecting A second amplitude threshold of the difference in amplitude between different signals output by different nano-friction sensors over the same time period. Specifically, the threshold comparator can compare the amplitude of the same signal output by the same nano-friction sensor in different time periods with the first amplitude threshold, and can understand the change of the signal with time, for example, can understand a certain body of the patient. The activity of the part over time; the threshold comparator can compare the amplitude difference between different signals output by different nano friction sensors in the same time period with the second amplitude threshold, and can understand that different body parts of the patient are in the same time period The difference in activities. In order to display the processing result of the signal processor 2, the patient monitoring system further includes a display 3 connected to the signal processor 2. The signal processor 2 transmits the processed electrical signal to the display 3 for display by the display 3. For example, the display 3 can display the activity of each part of the patient's body part within a specified period of time in a chart or data as needed. The display 3 may be a display device such as a CRT display or an LCD liquid crystal display.

In addition, in order to promptly notify the medical staff and family members of the patient's monitoring, the patient monitoring system further includes a communication device 4 connected to the signal processor 2. The communication device 4 is used to notify medical personnel and family members through various communication means when necessary. For example, the communication device 4 can communicate by means of wireless communication or wired communication. Among them, the wireless communication mode can be selected by radio frequency, microwave, infrared, third generation mobile communication technology or other suitable wireless transmission mode.

Further, in order to achieve better monitoring effect, the patient monitoring system can further package An alarm 5 connected to the communication device 4 is provided for alarming when the patient is in danger, as shown in FIG. The alarm device 5 can be alarmed by means of a signal light alarm, a buzzer alarm or a signal light combined with a buzzer, so as to timely inform the nurse, doctor, family and other guardians of the patient's change information.

Moreover, in order to more easily notify the patient's family, the patient monitoring system can further include: a pager 6, connected to the communication device 4, as shown in FIG. The pager 6 can be a portable communication device such as a pager or a mobile phone, and can receive a signal sent by the communication device 4 through the pager 6 to notify the patient's family and other related personnel.

The patient monitoring system in the embodiment of the present invention uses a nano-friction sensor to monitor the patient's activity. Since the nano-friction sensor itself can generate electrical energy, no external power source is required to supply power to the sensor. In addition, the output pressure signal of the nano-friction sensor of the present invention is stable, so that the monitoring result is more accurate, and the sensitivity of the sensor made of the friction generator is higher. In the present invention, the manufacturing process of the sensor is simple, and the cost is low. Therefore, the sensor made by the friction generator can effectively and accurately monitor the patient state, and the cost is greatly saved.

It will be understood by those skilled in the art that, although the above description has been described in order to facilitate the understanding of the steps of the method, it should be noted that the order of the above steps is not strictly limited.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, such as: ROM/RAM, Disk, CD, etc.

It will also be understood that the device structure shown in the figures or embodiments is merely illustrative and represents a logical structure. The modules displayed as separate components may or may not be physically separate, and the components displayed as modules may or may not be physical modules. The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Claim

A patient monitoring system, comprising:

At least one nano-friction sensor, a signal processor coupled to the at least one nano-friction sensor, and a display and communication device respectively coupled to the signal processor, wherein the nano-friction sensor comprises: a first stacked in sequence An electrode, a first polymer insulating layer, and a second electrode; wherein the first electrode and the second electrode are signal output electrodes of a nano friction sensor.

2. The patient monitoring system according to claim 1, wherein at least one of the two faces of the first polymer insulating layer and the second electrode disposed opposite each other is provided with a micro/nano structure .

3. The patient monitoring system according to claim 1, wherein the nano-friction sensor further comprises: a second polymer disposed between the second electrode and the first polymer insulating layer Polymer insulation layer.

The patient monitoring system according to claim 3, wherein at least one of the two faces of the first polymer insulating layer and the second polymer insulating layer are disposed opposite each other Micro-nano structure.

The patient monitoring system according to any one of claims 3 to 4, wherein the nano-friction sensor further comprises: a first polymer insulating layer and the second polymer An intervening film layer between the polymer insulating layers, wherein the intervening film layer is provided with a micro/nano structure on a surface of the first polymer polymer insulating layer.

6. A patient monitoring system according to any of claims 2, 4 or 5, characterized by a nanoscale pore structure.

7. The patient monitoring system of claim 1, wherein the signal processor further comprises:

a filter circuit, an analog to digital conversion circuit coupled to the output of the filter circuit, and a central processing unit coupled to the output of the analog to digital conversion circuit.

8. The patient monitoring system of claim 7, wherein the central processor further comprises: a threshold setter that sets a signal amplitude threshold and a signal time interval threshold, and a threshold comparison of the comparison signal amplitude and the signal time interval Device.

The patient monitoring system according to claim 8, wherein the number of the nano-friction sensors is plural, and the signal amplitude threshold comprises: reflecting the same signal output by the same nano-friction sensor in different time periods The first amplitude threshold of the amplitude change, and a second amplitude threshold that reflects the difference in amplitude between different signals output by the different nano-friction sensors over the same time period.

The patient monitoring system according to any one of claims 1 to 9, wherein the cross-sectional shape of the nano-friction sensor is a circular or planar rectangle; wherein, when the cross-sectional shape of the nano-friction sensor is a circle When annular, the nano-friction sensor is placed at the wrist and/or ankle.

The patient monitoring system according to any one of claims 1 to 10, wherein the nano-friction sensor is a glove-shaped sensor; or the nano-friction sensor is a patch sensor.

The patient monitoring system according to any one of claims 1 to 11, wherein the patient monitoring system further comprises: an alarm connected to the communication device, and/or connected to the communication device Pager.