CN210931350U - Piezoelectric type skin detector - Google Patents
Piezoelectric type skin detector Download PDFInfo
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- CN210931350U CN210931350U CN201822099695.XU CN201822099695U CN210931350U CN 210931350 U CN210931350 U CN 210931350U CN 201822099695 U CN201822099695 U CN 201822099695U CN 210931350 U CN210931350 U CN 210931350U
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Abstract
The utility model discloses a piezoelectric type skin detector relates to biosensor and piezoelectric sensing technical field, can realize miniaturized measuring device's the noninvasive live body measurement. The utility model discloses a: probe, conduction subassembly, sensing component, signal acquisition module. One end of the probe is in contact with the surface to be measured, the other end of the probe is in contact with the conduction assembly, the conduction assembly is connected with the sensing assembly in a critical contact state, and the sensing assembly is connected with the signal acquisition module. The probe transmits the contacted body surface condition to the sensing assembly through the conducting assembly, the sensing assembly generates an output signal through a contacted input signal, and the signal acquisition module acquires the output signal of the sensing assembly. The utility model discloses utilize positive piezoelectric effect, there is not the detection skin state information of wound, convert certain physics and chemistry information in the skin to electric charge or voltage information, for the physiological state sign of skin provides supplementary reference to have simple structure, respond fast, detect that information is abundant, the comfort level is high, there is not advantage such as wound.
Description
Technical Field
The utility model relates to a biosensor and piezoelectric sensing technical field especially relate to a piezoelectric type skin detector.
Background
The surface of the skin is a mirror of the physiological health condition of a human body, and reference can be provided for qualitatively and quantitatively evaluating the current state of the skin through detection feedback analysis of skin tissue performance parameters. As the largest tissue organ of human body, the skin is the medium for exchanging human body with external environment, has complex physiological functions, and is influenced by various factors such as body fluid, metabolism, physicochemical environment and the like, and the realization of the physiological functions of the skin depends on the biomechanical properties such as viscoelasticity, tension, pressure resistance and the like. The method detects the characteristics of the skin such as biomechanics, morphology, size and position, analyzes the viscoelasticity, size, material quality, hardness and softness, pathology, pathological changes and other information, and has extremely important reference value and guidance function in the fields of health care, expression analysis, plastic surgery, clinic and the like, which is the reason why the skin biomechanics is gradually paid more and more attention by people. The quantitative mechanical property of the skin soft tissue is accurately described, the physiological function of the skin can be better characterized from the mechanical perspective, reference is provided for clinical skin transplantation, surgical plastic, soft tissue injury, wound treatment, lesion monitoring, pathological analysis, health care and health maintenance and development of novel skin substitute materials, and the quantitative mechanical property model has important significance in various fields of treatment and protection of human skin diseases, biomechanics, medical health, animation, psychology, criminal investigation and the like.
The measurement of skin mechanical properties is often divided into two modes of in vitro measurement and in vivo measurement. The advantage of in vitro measurement is that the skin can be made into any required shape for experiment, the skin can be processed in a layered mode, the mechanical properties of each layer of the skin can be respectively researched, in addition, the in vitro skin can also be used for researching limit load, the damage mechanism of the skin and the like, but the skin tissue structure is extremely complex, and the skin tissue structure has a large amount of nerve tissues besides collagen fibers, subcutaneous fat, pores and other structures, when external stimulation occurs, the nerve tissues can react to the stimulation, so that the mechanical properties of the skin are influenced, therefore, the influence of the nerve tissues on the mechanical properties cannot be represented by in vitro measurement, and the method belongs to invasive detection, and the detection range and the effect are limited.
The accuracy and reliability of the imprinting method as a detection method widely used for noninvasive living body measurement are generally accepted in clinical medicine, related instruments are also applied to clinical detection, but the imprinting method is not suitable for household use and miniaturization due to high use cost and professional training, and the use popularization rate of the imprinting method is limited.
In summary, there is a lack in the prior art of a skin detection device that is miniaturized and capable of performing non-invasive in-vivo measurements.
Disclosure of Invention
The utility model provides a piezoelectric type skin detector can be through piezoelectric film's malleation electric effect, and the state information such as noninvasive detection skin performance parameter, appearance, size, position converts certain physics and chemistry information in the skin into corresponding electric charge or voltage information, provides supplementary reference for the physiological state sign of skin. The device has the advantages of simple structure, easy miniaturization, quick response, difficult external interference, rich detection information, good man-machine/human body coupling, high comfort level, no wound and the like.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a piezoelectric skin detector comprising: probe, conduction subassembly, sensing component, signal acquisition module.
One end of the probe is in contact with the surface to be measured, the other end of the probe is in contact with the conduction assembly, the conduction assembly is connected with the sensing assembly in a critical contact state, and the sensing assembly is connected with the signal acquisition module. The probe transmits the contacted body surface condition to the sensing assembly through the conducting assembly, the sensing assembly generates an output signal through a contacted input signal, and the signal acquisition module acquires the output signal of the sensing assembly.
Furthermore, the probe comprises a probe bead retainer and probe beads, wherein the probe bead retainer is provided with installation positioning holes according to the array, and the probe beads are installed in the installation positioning holes.
Further, the conduction assembly comprises a rigid retainer and a T-shaped contact head, the rigid retainer is discretized and provided with a through hole, the T-shaped contact head is connected with the rigid retainer through the through hole, one end of the T-shaped contact head is in contact with the ball, and the other end of the T-shaped contact head is in contact with the sensing assembly.
Furthermore, the through hole corresponds to the installation positioning hole.
Furthermore, the sensing assembly comprises a base, a vertical grid plate, a supporting framework, a substrate and a piezoelectric film, wherein the vertical grid plate is fixedly connected to the base, the supporting framework is arranged between grids of the vertical grid plate, the substrate is propped open through the supporting framework, the piezoelectric film is pasted in the center of the substrate, and the piezoelectric film is in critical contact with the T-shaped contact.
Furthermore, a return spring is arranged at a gap between the vertical grid plate and the rigid retainer, the return spring is in a natural stretching state, and the compression and stretching of the return spring are used for adjusting the contact state among the probe bead, the conduction assembly and the sensing assembly and the return path of the probe bead.
Furthermore, the probe bead retainer and the probe beads are made of titanium or platinum; or the surface of the skin-friendly skin-.
Furthermore, the T-shaped contact is made of a silicone gel elastomer, and a hard substrate is embedded in the protruding contact.
Furthermore, the rigid retainer, the vertical grid plate and the support framework are made of rigid materials.
Furthermore, the piezoelectric film is made of PVDF, zinc oxide, PZT or organic metal trihalide perovskite.
When the probe is used, the probe is vertically arranged on a skin area to be detected, certain pressure is loaded, each probe bead is enabled to be in contact with the skin area to be detected, and the probe beads press against the T-shaped lower surface of the T-shaped contact, so that the T-shaped lower surface of the T-shaped contact is deformed. The upper surface of the upper convex contact of the T-shaped contact transmits the displacement generated by self deformation and the pressure to the piezoelectric film adhered to the substrate. The piezoelectric film has a positive piezoelectric effect, deforms under the action of pressure, and the charge quantity or voltage generated on the surface of the piezoelectric film is proportional to the pressure. The piezoelectric film causes the potentials of the upper and lower surfaces to change due to the electrode change of the internal dielectric, and the charges on the two electrodes in contact with the surfaces are readjusted to balance the surface potentials of the piezoelectric film, so that charges flow in the circuit. The mechanical quantity and the electric signals can be mutually converted by utilizing the positive piezoelectric effect of the piezoelectric films, and the signal acquisition module is used for amplifying and processing the acquired electric signals responded by each piezoelectric film. The distribution conditions of the appearance, the contour and the like of the skin area to be detected and the approximate distribution condition of the basic mechanical property of the skin can be reflected through the processing of the signal acquisition module.
In conclusion, the utility model can rapidly represent the physiological state and the biomechanical property of the skin for the user in the skin nursing process, and provide auxiliary reference for skin nursing; in the skin treatment and rehabilitation process, evaluation references are provided for diagnosis, monitoring, treatment, relief or regulation of patients and medical care by detecting the distribution conditions of the skin tissue performance, state, shape, size and the like of the affected part; in the process of disease diagnosis through skin in vitro, rough judgment is provided for diagnosis, prevention and monitoring of medical care personnel and users through the distribution of hardness, softness, appearance and the like of a skin detection area.
The utility model has the advantages that:
the utility model discloses utilize piezoelectric film's malleation electric effect, noninvasive detection skin performance parameter, appearance, size, position etc. skin state information converts certain physicochemical information in the skin into corresponding electric charge or voltage information, provides supplementary reference for the physiological state sign of skin; qualitative and quantitative initial judgment reference information can be rapidly provided for individuals, medical care personnel and the like in the processes of nursing, operation, treatment, examination, diagnosis and the like; the device has the advantages of simple structure, easy miniaturization, quick response, difficult external interference, rich detection information, good man-machine/human body coupling, high comfort level, no wound and the like.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of the general structure section of the present invention;
fig. 3 is a partial schematic view of the sensing structure of the present invention;
fig. 4 is a schematic view of the sensing structure according to the present invention;
fig. 5 is a schematic diagram of a rectangular linear array scheme according to the present invention;
fig. 6 is a schematic diagram of a circular structure linear array scheme according to the present invention.
The device comprises a shell, a probe 2, a probe bead holder 21, a probe bead 22, a conductive component 3, a rigid holder 31, an independent T-shaped contact 32, a reset spring 4, a sensing component 5, a base 51, a vertical grid plate 52, a supporting framework 53, a substrate 54, a piezoelectric film 55, a signal acquisition module 6, an information feedback and control component 7, an information display screen component 8 and a data transmission and conversion interface 9.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in further detail with reference to the following embodiments.
The embodiment of the utility model provides a piezoelectric type skin detector, as shown in figure 1,2, include: the device comprises a shell 1, a probe 2, a conducting component 3, a return spring 4, a sensing component 5, a signal acquisition module 6, an information feedback and control component 7, an information display screen component 8 and a data transmission and conversion interface 9.
The bottom of the shell 1 is provided with a probe 2, and the probe 2 comprises a probe bead holder 21 and a probe bead 22. The probe bead holder 21 is provided with probe bead mounting and positioning holes in an array manner, the probe bead mounting and positioning holes are used for mounting and positioning the probe beads 22, and the probe 2 is fixedly connected with the shell 1 through the probe bead holder 21.
The conducting component 3 comprises a rigid retainer 31 and T-shaped contacts 32, the discrete rigid retainer 31 is provided with an array T-shaped contact 32 mounting hole, the T-shaped contacts 32 are mounted in the array T-shaped contact 32 mounting hole of the discrete rigid retainer 31, the upper end face of the rigid retainer 31 is provided with a suspension loop connected with one end of the return spring 4 in an array mode, and the other end of the rigid retainer 31 is connected to the upper portion of the conducting component 3 and is in a natural stretching state.
As shown in fig. 3 and 4, the sensing assembly 5 includes a base 51, a vertical grid plate 52, a supporting skeleton 53, a substrate 54, and a piezoelectric film 55. The vertical grid plates 52 are provided with an array of grid holes in the same pattern as the probe ball holders 21 and the rigid holders 31. The upper end surface of the vertical grid plate 52 is fixedly connected with the base 51, and the lower end surface of the vertical grid plate 52 is provided with a hanging lug for installing the return spring 4.
The supporting skeletons 53 are respectively and independently fixedly installed in the grid holes of the patterned array of the vertical grid plate 52, and the substrate 54 is bonded or fixed on the supporting surface at the lower end of the supporting skeletons 53. The piezoelectric film 55 is bonded to the center of the lower end surface of the base 54, and the piezoelectric film 55 is in a critical contact state with the ball contact surface of the T-shaped contact 32.
The probe 2 is positioned at the lower part of the shell 1 and is fixedly connected with the shell 1 through a probe bead retainer 21. The conduction assembly 3, the reset spring 4, the sensing assembly 5, the signal acquisition module 6 and the information feedback and control assembly 7 are arranged inside the shell 1. The conductive assembly 3 and the sensing assembly 5 are suspended by the return spring 4, and the compression and the extension of the return spring 4 are used for adjusting the relative contact state among the probe bead 22 of the probe 2, the conductive assembly 3 and the sensing assembly 5 and the return stroke of the probe bead 22.
The sensing component 5 is fixedly arranged at the middle lower part inside the shell 1 through a base 51; the signal acquisition module 6 and the information feedback and control assembly 7 are respectively and fixedly arranged in the shell 1, the information display screen assembly 8 and the data transmission and conversion interface 9 are arranged at proper positions on the outer side surface of the shell 1, and interfaces are arranged among the sensing assembly 5, the signal acquisition module 6, the information feedback and control assembly 7, the information display screen assembly 8 and the data transmission and conversion interface 9 and used for acquiring, transmitting, processing, controlling and the like of signals and information among each other.
The shell 1 is made of light and moderate-strength plastic or metal or synthetic material, and soft and comfortable materials such as medical silica gel and the like are usually embedded in the holding, pinching or holding part of the outer surface.
The probe bead holder 21 and the probe bead 22 of the probe 2 are made of skin-friendly materials such as titanium or platinum, or are made of hard materials such as metal, plastic or synthetic materials, and the surface of the hard materials is coated with skin-friendly materials such as titanium or platinum.
The T-shaped contact 32 is made of silicone gel elastomer and the male contact has a hard base embedded inside to help shape the male contact.
The rigid retainer 31, the vertical grid plate 52 and the supporting framework 53 are made of rigid materials such as light metal, plastics or synthetic materials.
The return spring 4 is made of spring steel material; the substrate 54 is made of silicone gel or the like to be a flexible substrate.
As shown in FIGS. 4, 5 and 6, the shape of the probe bead holder 21, the rigid holder 31 and the vertical grid plate 52, which may be a basic shape such as a square, a rectangle, a circle, an ellipse, etc., and the array pattern and manner of the holes are corresponding and consistent, and the shape of the external shape may be as shown in FIGS. 5 and 6. The array pattern may be a linear array, a radial array, an array of tracks, or the like. The array mode, the number and the relative position of the probe beads 22, the T-shaped contacts 32, the base 51, the vertical grid plate 52, the supporting framework 53, the substrate 54 and the piezoelectric film 55 are kept consistent. The return springs 4 are uniformly distributed between the conducting component 3 and the sensing component 5 and are in a natural stretching state.
The probe bead 22 is in critical contact with the T-shaped lower surface of the T-shaped contact 32, and the upper surface of the protruding contact of the T-shaped contact 32 and the substrate 54 to which the piezoelectric film 55 is attached.
The piezoelectric film 55 may be a piezoelectric film such as PVDF, zinc oxide, PZT, or an organic metal trihalide perovskite.
When the device is used, the detectors with corresponding measuring ranges and shapes and specifications are selected according to the age, the sex, the detection positions and the like of a user, and the switch of the information display screen component 8 is turned on. The data transmission and conversion interface 9 is connected to an external device according to whether the detection information needs to be transmitted to a processing device such as an external computer or whether the detection information needs to be stored, controlled, fed back and processed by the external device.
The probe 2 is vertically arranged on a skin area to be detected and is loaded with certain pressure, so that each probe bead 22 is in contact with the skin area to be detected, and the probe beads 22 press against the T-shaped lower surface of the T-shaped contact 32, so that the T-shaped lower surface of the T-shaped contact 32 deforms.
The upper convex contact upper surface of the T-shaped contact 32 transmits displacement resulting from its deformation and the received pressure to the piezoelectric film 55 adhered to the substrate 54. The piezoelectric film 55 has a positive piezoelectric effect and deforms under pressure, and the amount of charge or voltage generated on the surface thereof is proportional to the pressure applied.
The piezoelectric thin film 55 causes the potentials of the upper and lower surfaces to change due to the electrode change of the internal dielectric, and the charges on the two electrodes in contact with the surfaces are readjusted to balance the surface potential of the piezoelectric thin film 55, so that charges flow in the circuit.
The mechanical quantity and the electric signal can be mutually converted by utilizing the positive piezoelectric effect of the piezoelectric film 55, and the signal acquisition module 6 amplifies and processes the acquired electric signal responded by each piezoelectric film 55.
The distribution conditions of the appearance, the contour and the like of the skin area to be detected and the approximate distribution condition of the basic mechanical property of the skin can be reflected through the processing of the signal acquisition module 6. The signal acquisition module 6 transmits all processed signal data to the information feedback and control component 7 and the information display screen component 8 respectively, and transmits the processed signal data to the external processing and analyzing equipment through the data transmission and conversion interface 9. The detection signals are further analyzed and processed in detail through external equipment, and mechanical property parameters (such as viscoelasticity and the like), health state, morphology, size and position information of the skin to be detected are obtained. The information display screen component 8 can display specific data, curves, graphs and the like of the detected information, and a user can switch the display window as required.
The utility model can rapidly represent the physiological state and the biomechanical property of the skin for the user in the skin nursing process, and provide auxiliary reference for skin nursing; in the skin treatment and rehabilitation process, evaluation references are provided for diagnosis, monitoring, treatment, relief or regulation of patients and medical care by detecting the distribution conditions of the skin tissue performance, state, shape, size and the like of the affected part; in the process of disease diagnosis through skin in vitro, rough judgment is provided for diagnosis, prevention and monitoring of medical care personnel and users through the distribution of hardness, softness, appearance and the like of a skin detection area. The utility model discloses utilize piezoelectric film's malleation electric effect, the skin state information such as noninvasive detection skin performance parameter, appearance, size, position converts certain physics and chemistry information in the skin into corresponding electric charge or voltage information, provides supplementary reference for the physiological state sign of skin. Qualitative and quantitative initial judgment reference information can be rapidly provided for individuals, medical care personnel and the like in the processes of nursing, operation, treatment, examination, diagnosis and the like; the device has the advantages of simple structure, easy miniaturization, quick response, difficult external interference, rich detection information, good man-machine/human body coupling, high comfort level, no wound and the like.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A piezoelectric skin detector, comprising: the device comprises a probe (2), a conducting component (3), a sensing component (5) and a signal acquisition module (6);
one end of the probe (2) is contacted with the surface to be measured, the other end of the probe is contacted with the conduction assembly (3), the conduction assembly (3) is connected with the sensing assembly (5) in a critical contact state, and the sensing assembly (5) is connected with the signal acquisition module (6);
the probe (2) transmits the contacted body surface condition to the sensing assembly (5) through the conducting assembly (3), the sensing assembly (5) generates an output signal through a contacted input signal, and the signal acquisition module (6) acquires the output signal of the sensing assembly (5).
2. The piezoelectric skin detector according to claim 1, wherein the probe (2) comprises a probe bead holder (21) and probe beads (22), wherein the probe bead holder (21) is provided with mounting positioning holes according to an array, and the probe beads (22) are mounted in the mounting positioning holes.
3. The piezoelectric skin detector according to claim 2, wherein the conducting assembly (3) comprises a rigid holder (31) and a T-shaped contact (32), the rigid holder (31) is discretized with a through hole, the T-shaped contact (32) is connected with the rigid holder (31) through the through hole, one end of the T-shaped contact (32) contacts the probe bead (22), and the other end of the T-shaped contact contacts the sensing assembly (5).
4. The piezoelectric skin detector according to claim 3, wherein the through hole corresponds to the positioning hole.
5. The piezoelectric skin detector according to claim 3 or 4, wherein the sensing assembly (5) comprises a base (51), a vertical grid plate (52), a supporting framework (53), a base (54) and a piezoelectric film (55), the vertical grid plate (52) is fixedly connected to the base (51), the supporting framework (53) is arranged between grids of the vertical grid plate (52), the base (54) is propped open through the supporting framework (53), the piezoelectric film (55) is adhered to the center of the base (54), and the piezoelectric film (55) is in critical contact with the T-shaped contact (32).
6. The piezoelectric skin detector according to claim 5, wherein a return spring (4) is installed in the gap between the vertical grid (52) and the rigid retainer (31).
7. The piezoelectric skin detector according to claim 2, wherein the probe bead holder (21) and the probe bead (22) are made of titanium or platinum; or is made by coating titanium or platinum on the surface of metal or plastic or synthetic material.
8. The piezoelectric skin detector according to claim 3, wherein the T-shaped contact (32) is made of silicone gel elastomer and the hard substrate is embedded inside the protruding contact.
9. The piezoelectric skin detector according to claim 5, wherein the rigid holder (31), the vertical grid plate (52) and the supporting skeleton (53) are made of rigid materials.
10. The piezoelectric skin detector according to claim 5, wherein the piezoelectric film (55) is made of PVDF, zinc oxide, PZT, or an organometallic trihalide perovskite.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822099695.XU CN210931350U (en) | 2018-12-13 | 2018-12-13 | Piezoelectric type skin detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822099695.XU CN210931350U (en) | 2018-12-13 | 2018-12-13 | Piezoelectric type skin detector |
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| CN210931350U true CN210931350U (en) | 2020-07-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109452931A (en) * | 2018-12-13 | 2019-03-12 | 南京航空航天大学 | A kind of piezoelectric type skin detectors |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109452931A (en) * | 2018-12-13 | 2019-03-12 | 南京航空航天大学 | A kind of piezoelectric type skin detectors |
| CN109452931B (en) * | 2018-12-13 | 2024-06-11 | 南京航空航天大学 | Piezoelectric skin detector |
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