CN220158235U - Biomedical signal processing and analyzing equipment - Google Patents
Biomedical signal processing and analyzing equipment Download PDFInfo
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- CN220158235U CN220158235U CN202321526852.5U CN202321526852U CN220158235U CN 220158235 U CN220158235 U CN 220158235U CN 202321526852 U CN202321526852 U CN 202321526852U CN 220158235 U CN220158235 U CN 220158235U
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- 239000000758 substrate Substances 0.000 claims description 37
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 21
- 229910052709 silver Inorganic materials 0.000 claims description 21
- 239000004332 silver Substances 0.000 claims description 21
- 230000003750 conditioning effect Effects 0.000 claims description 11
- 229920001328 Polyvinylidene chloride Polymers 0.000 claims description 4
- 239000005033 polyvinylidene chloride Substances 0.000 claims description 4
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 3
- -1 polydimethylsiloxane Polymers 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 15
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 230000029058 respiratory gaseous exchange Effects 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 32
- 239000010408 film Substances 0.000 description 29
- 238000010586 diagram Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 210000001015 abdomen Anatomy 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000035565 breathing frequency Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000241 respiratory effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- Measuring And Recording Apparatus For Diagnosis (AREA)
Abstract
The utility model discloses biomedical signal processing and analyzing equipment, which relates to the technical field of biomedical signal processing. The utility model relates to biomedical signal processing and analyzing equipment which is used for monitoring a biological signal of respiration, and has high sensitivity and accurate monitoring result.
Description
Technical Field
The utility model relates to the technical field of biomedical signal processing, in particular to biomedical signal processing and analyzing equipment.
Background
At present, in the biomedical signal processing process, a flexible piezoelectric sensor is a hot spot which is continuously focused in the industry on monitoring human physiological signals, but manufacturing materials of some sensors have certain harm to human bodies, and the packaging integrated processing of the sensors is necessary to ensure that the sensors have insulativity, ageing resistance and weather resistance, and the traditional film sensor packaging process needs to firstly prepare sensitive elements, then carry out edge processing on the sensitive elements, coat electrodes, weld leads, finally package protective layers and cut into finished products of the sensors.
However, the existing flexible piezoelectric sensor has some disadvantages when in use, such as:
the existing flexible piezoelectric film sensor applied to respiratory monitoring in biomedical signals also has the problems of low sensitivity, high precision and controllable processing difficulty and low system integration level, and therefore, the biomedical signal processing and analyzing device is provided.
Disclosure of Invention
In view of the above, the utility model aims to provide biomedical signal processing and analyzing equipment, so as to solve the problems of low sensitivity, high accuracy and controllability processing difficulty and low system integration of the existing flexible piezoelectric film sensor applied to respiratory monitoring in biomedical signals.
Based on the above purpose, the utility model provides biomedical signal processing and analyzing equipment, which comprises a shell, wherein a circuit board assembly and a flexible piezoelectric sensor assembly are arranged in the shell, and a strip-shaped through hole is formed in the middle of the upper end of the shell;
the flexible piezoelectric sensor assembly comprises a flexible substrate connected with the upper end of the inner wall of the shell through bolts, the middle of the flexible substrate is of a three-millimeter arch structure, vertical projection of the bottom edge of the flexible substrate is of a six-millimeter square shape, the arch structure of the middle of the flexible substrate is located outside the strip-shaped through hole, a lower silver electrode layer, a piezoelectric film layer and an upper silver electrode layer are sequentially attached to the upper portion of the flexible substrate, a first conducting wire is electrically connected with the lower silver electrode layer, a second conducting wire is electrically connected with the upper silver electrode layer, and the lower ends of the first conducting wire and the second conducting wire are electrically connected with the circuit board assembly.
Further, the outside of casing has the apron through bolted connection, the casing lateral part is equipped with two magic tape, the magic tape tip bonds or breaks off.
Further, the flexible piezoelectric sensor assembly further comprises a PU film arranged on the lower silver electrode layer, and the upper layer of the PU film is mutually attached to the lower surface of the shell.
Further, the circuit board assembly comprises a circuit board, the circuit board is connected with the shell through bolts, and the lower ends of the first lead and the second lead are electrically connected with the circuit board.
Further, a signal conditioning circuit is arranged on the circuit main board and used for converting, reducing noise and transmitting signals.
Furthermore, the flexible substrate is made of polydimethylsiloxane materials, so that the flexible piezoelectric sensor assembly is made of polyvinylidene chloride films.
Compared with the prior art, the utility model has the following beneficial effects:
in the utility model, the output voltage of the sensors with different substrate heights has good linearity with acting force. The sensitivity of the sensor with the heights of 1 mm, 3 mm and 5 mm is 0.137V/N, 0.214V/N and 0.154V/N respectively, the height of the flexible substrate is increased in a certain range, the sensitivity of the sensor is increased and then decreased in a certain range, the change reason of the sensitivity of the sensor is analyzed, when the height of the flexible substrate is increased, the arched structure of the sensor is changed, different average strains are generated after the piezoelectric film is stressed, the output voltage of the sensor is increased and then decreased, so that the sensitivity of the sensor is changed, and the change trend of the sensor is the same as that of the finite element simulation result. In summary, by changing the arch height to optimize the sensor, when the height of the flexible substrate is about half of the side length of the bottom, the average strain generated by the piezoelectric film is maximum, and the sensitivity of the sensor is highest.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a biomedical signal processing and analyzing device connected with a velcro tape;
FIG. 2 is a schematic diagram showing the overall structure of a biomedical signal processing and analyzing apparatus according to the present utility model;
FIG. 3 is a schematic view showing the overall structure of the inside of a housing in a biomedical signal processing and analyzing apparatus according to the present utility model;
FIG. 4 is a schematic diagram of an exploded view of a biomedical signal processing and analysis device according to the present utility model;
FIG. 5 is a schematic diagram of the overall structure of a flexible piezoelectric sensor in a biomedical signal processing and analysis apparatus according to the present utility model;
FIG. 6 is a schematic illustration of the front cross-sectional structure of a biomedical signal processing and analysis device according to the present utility model;
fig. 7 is a schematic view of a partial enlarged structure at a in fig. 6 according to the present utility model.
In the figure: 1. a housing; 2. a circuit board assembly; 3. a flexible piezoelectric sensor assembly; 4. a cover plate; 5. a magic tape; 201. a circuit motherboard; 202. a signal conditioning circuit; 301. a flexible substrate; 302. a lower silver electrode layer; 303. a piezoelectric thin film layer; 304. a silver electrode layer is arranged on the upper surface of the substrate; 305. a PU film; 306. a first wire; 307. and a second wire.
Detailed Description
The present utility model will be further described in detail with reference to specific embodiments in order to make the objects, technical solutions and advantages of the present utility model more apparent.
Unless otherwise defined, technical terms or academic phrases used herein should be construed to have a general meaning as understood by those having ordinary skill in the art to which the present utility model pertains. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Referring to fig. 1 to 7, fig. 1 is a schematic diagram showing an overall structure of a biomedical signal processing and analyzing device and a magic tape according to the present utility model; FIG. 2 is a schematic diagram showing the overall structure of a biomedical signal processing and analyzing apparatus according to the present utility model; FIG. 3 is a schematic view showing the overall structure of the inside of a housing in a biomedical signal processing and analyzing apparatus according to the present utility model; FIG. 4 is a schematic diagram of an exploded view of a biomedical signal processing and analysis device according to the present utility model; FIG. 5 is a schematic diagram of the overall structure of a flexible piezoelectric sensor in a biomedical signal processing and analysis apparatus according to the present utility model; FIG. 6 is a schematic illustration of the front cross-sectional structure of a biomedical signal processing and analysis device according to the present utility model; fig. 7 is a schematic view of a partial enlarged structure at a in fig. 6 according to the present utility model.
A biomedical signal processing and analyzing device comprises a shell 1, wherein a circuit board assembly 2 and a flexible piezoelectric sensor assembly 3 are arranged in the shell 1, and a strip-shaped through hole is formed in the middle of the upper end of the shell 1;
the flexible piezoelectric sensor assembly 3 comprises a flexible substrate 301 connected with the upper end of the inner wall of the shell 1 through bolts, the middle of the flexible substrate 301 is of a three-millimeter arch structure, vertical projection of the bottom edge of the flexible substrate 301 is of a six-millimeter square shape, the arch structure in the middle of the flexible substrate 301 is located outside the strip-shaped through hole, a lower silver electrode layer 302, a piezoelectric film layer 303 and an upper silver electrode layer 304 are sequentially attached to the upper portion of the flexible substrate 301, a first lead 306 is electrically connected to the lower silver electrode layer 302, a second lead 307 is electrically connected to the upper silver electrode layer 304, and the lower ends of the first lead 306 and the second lead 307 are electrically connected to the circuit board assembly 2.
In the experimental process, the output voltage of the sensors with different substrate heights has good linearity with the acting force. The sensitivity of the sensor with the heights of 1 mm, 3 mm and 5 mm is 0.137V/N, 0.214V/N and 0.154V/N respectively, the height of the flexible substrate is increased in a certain range, the sensitivity of the sensor is increased and then decreased in a certain range, the change reason of the sensitivity of the sensor is analyzed, when the height of the flexible substrate is increased, the arched structure of the sensor is changed, different average strains are generated after the piezoelectric film is stressed, the output voltage of the sensor is increased and then decreased, the sensitivity of the sensor is changed, and the change trend of the sensor is the same as that of the finite element simulation result. In summary, by optimizing the sensor by changing the arch height, when the flexible substrate is about half the bottom side length, the average strain generated by the piezoelectric film is maximum, and the sensitivity of the sensor is highest;
in practical use, the thickness of the piezoelectric film layer 303 is smaller and the piezoelectric film layer 303 is attached to the flexible substrate 301, in the breathing process of a wearer, the piezoelectric film layer 303 deforms along with the flexible substrate 301 after the abdomen is continuously raised to apply an acting force, and the strain generated after the stress of the piezoelectric film layer 303 is increased by changing the arch structure of the flexible substrate 301, so that the open-circuit voltage of the piezoelectric film layer 303 is increased, the breathing of the wearer is monitored by measuring the voltage change, the transmission current and the voltage of the lower silver electrode layer 302 and the upper silver electrode layer 304 are realized, and finally the transmission current and the voltage are transmitted to the circuit board 201 through the first lead 306 and the second lead 307, and the biomedical signal of the breathing frequency of the wearer is output after the processing of the signal conditioning circuit 202 on the circuit board 201, so that the biomedical signal processing and analysis are realized.
Further, the cover plate 4 is connected to the outside of the shell 1 through bolts, two magic tapes 5 are arranged on the side of the shell 1, the ends of the magic tapes 5 are bonded or disconnected, and the device is worn on the abdomen of a patient by using the magic tapes, so that the side of the arch structure in the middle of the flexible substrate 301 is attached to the patient.
Further, the flexible piezoelectric sensor assembly 3 further comprises a PU film 305 disposed on the lower silver electrode layer 302, and the upper layer of the PU film 305 is attached to the lower surface of the housing 1.
Further, the circuit board assembly 2 includes a circuit board 201, the circuit board 201 is connected to the housing 1 through bolts, the lower ends of the first conductive wire 306 and the second conductive wire 307 are electrically connected to the circuit board 201, and the first conductive wire 306 and the second conductive wire 307 are mainly used for transmitting the voltage generated during the monitoring process of the piezoelectric film layer 303.
Further, the circuit board 201 is provided with a signal conditioning circuit 202, the signal conditioning circuit 202 is used for converting, reducing noise and transmitting signals, the signal conditioning circuit 202 includes a piezoelectric film equivalent circuit, a charge amplifying circuit, a voltage amplifying circuit, a low-pass filtering circuit, a power frequency trap circuit, a voltage lifting circuit, a voltage follower circuit, a signal transmitting circuit and a signal processing circuit, the signal conditioning circuit 202 converts, amplifies, reduces noise and transmits analog signals of the sensor to obtain digital signals capable of being displayed, and the signal conditioning circuit 202 is common knowledge to those skilled in the art and will not be repeated here.
Further, the flexible substrate 301 is made of polydimethylsiloxane, so that the flexible piezoelectric sensor component 3 has good linearity and sensitivity, the flexible substrate 301 of the sensor is easy to prepare, the piezoelectric film layer 303 is made of polyvinylidene fluoride film, the polyvinylidene chloride film has good flexibility, can be attached to the surface of a measured object, generates strain deformation along with the surface of the object, has the characteristics of high sensitivity, corrosion resistance, insulation and the like, and can realize energy conversion.
In summary, in practical use, the device is worn on the abdomen of a patient by using the magic tape, so that the side of the arch structure in the middle of the flexible substrate 301 is attached to the patient, the thickness of the piezoelectric film layer 303 is smaller and attached to the flexible substrate 301, the piezoelectric film layer 303 deforms along with the flexible substrate 301 after the abdomen continuously bulges to apply an acting force in the breathing process of the wearer, the arch structure of the flexible substrate 301 is changed, so that the strain generated after the stress of the piezoelectric film layer 303 is increased, the open-circuit voltage of the piezoelectric film layer 303 is increased, the breathing of the wearer is monitored by measuring the voltage change, the transmission current and the voltage are realized by the lower silver electrode layer 302 and the upper silver electrode layer 304, finally, the transmission current and the voltage are transmitted to the circuit board 201 by the first lead 306 and the second lead 307, the analog signal of the sensor is converted, amplified, noise-reduced, transmitted and processed by the signal conditioning circuit 202 on the circuit board 201, and the biomedical signal which can be displayed is finally output, and the biomedical signal of the breathing frequency of the wearer is realized.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the utility model (including the claims) is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the utility model, the steps may be implemented in any order and there are many other variations of the different aspects of the utility model as described above, which are not provided in detail for the sake of brevity.
The present utility model is intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present utility model should be included in the scope of the present utility model.
Claims (6)
1. A biomedical signal processing and analysis device, characterized by: the flexible piezoelectric sensor comprises a shell (1), wherein a circuit board assembly (2) and a flexible piezoelectric sensor assembly (3) are arranged inside the shell (1), and a strip-shaped through hole is formed in the middle of the upper end of the shell (1);
the flexible piezoelectric sensor assembly (3) comprises a flexible substrate (301) which is connected with the upper end of the inner wall of the shell (1) through bolts, the middle of the flexible substrate (301) is of a three-millimeter arch structure, vertical projection of the bottom edge of the flexible substrate (301) is of a six-millimeter square shape, the arch structure of the middle of the flexible substrate (301) is located outside the strip-shaped through hole, a lower silver electrode layer (302), a piezoelectric film layer (303) and an upper silver electrode layer (304) are sequentially attached to the upper portion of the flexible substrate (301), the lower silver electrode layer (302) is electrically connected with a first lead (306), the upper silver electrode layer (304) is electrically connected with a second lead (307), and the lower end of the first lead (306) and the lower end of the second lead (307) are electrically connected with the circuit board assembly (2).
2. A biomedical signal processing and analyzing device according to claim 1, wherein: the outside of casing (1) is connected with apron (4) through the bolt, casing (1) lateral part is equipped with two magic tape (5), the end bonding or disconnection of magic tape (5).
3. A biomedical signal processing and analyzing device according to claim 2, wherein: the flexible piezoelectric sensor assembly (3) further comprises a PU film (305) arranged on the lower silver electrode layer (302), and the upper layer of the PU film (305) is mutually attached to the lower surface of the shell (1).
4. A biomedical signal processing and analyzing device according to claim 3, wherein: the circuit board assembly (2) comprises a circuit main board (201), the circuit main board (201) is connected with the shell (1) through bolts, and the lower ends of the first lead (306) and the second lead (307) are electrically connected with the circuit main board (201).
5. A biomedical signal processing and analyzing device according to claim 4, wherein: the circuit main board (201) is provided with a signal conditioning circuit (202), and the signal conditioning circuit (202) is used for converting, reducing noise and transmitting signals.
6. A biomedical signal processing and analyzing device according to claim 5, wherein: the flexible substrate (301) is made of polydimethylsiloxane, so that the flexible piezoelectric sensor component (3) is made of polyvinylidene chloride film, and the piezoelectric film layer (303) is made of polyvinylidene chloride film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321526852.5U CN220158235U (en) | 2023-06-15 | 2023-06-15 | Biomedical signal processing and analyzing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321526852.5U CN220158235U (en) | 2023-06-15 | 2023-06-15 | Biomedical signal processing and analyzing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220158235U true CN220158235U (en) | 2023-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321526852.5U Active CN220158235U (en) | 2023-06-15 | 2023-06-15 | Biomedical signal processing and analyzing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220158235U (en) |
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- 2023-06-15 CN CN202321526852.5U patent/CN220158235U/en active Active
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