WO2019126967A1 - Surface strain measurement apparatus and surface strain sensor thereof - Google Patents

Abstract

Disclosed is a surface strain sensor, comprising: a light reflective film (11), used for deforming along with the change in pressure of a to-be-measured surface; a transparent connection layer (12), arranged stacked with the light reflective film (11); a first optical fiber array (13) and a second optical fiber array (14), each comprising a plurality of optical fibers (131, 141); a first end of said plurality of optical fibers (131, 141) is connected to the transparent connection layer (12), and the plurality of positions of connection between the plurality of optical fibers (131, 141) and the transparent connection layer (12) is distributed as a matrix on the transparent connection layer (12); a light emitter array (15), comprising a plurality of light emitters (151); said light emitters (151) are connected in a one-to-one correspondence with the second ends of the plurality of optical fibers (131) of the first optical fiber array (13); a light receiver array (16), comprising a plurality of light receivers (161); said light receivers (161) are connected in a one-to-one correspondence with the second ends of the plurality of optical fibers (141) of the second optical fiber array (14); the invention is capable of improving the accuracy of measurement of surface strain and preventing interference from the external environment.

Description

Surface strain detecting device and surface strain sensor thereof

[Technical Field]

The invention relates to the field of surface sensing technology, in particular to a surface strain detecting and device and a surface strain sensor thereof.

 【Background technique】

The surface strain sensor is a sensor for detecting static or dynamic data such as deformation pressure of a surface to be tested, and is widely used in medical and industrial robots. For example, a surface strain sensor is used to detect the pulse of the human body.

Taking pulse detection as an example, pulse diagnosis is one of the four clinics of traditional Chinese medicine, and it plays a very important role in the four clinics of Chinese medicine. The usual practice of TCM pulse diagnosis is that the Chinese medicine practitioner touches the patient's sacral artery with his finger, and feels the change of the patient's pulse wave by applying different pressures such as floating, middle and sinking. A series of pulse waves that contain information such as the position, strength, weakness, trend, shape, width, and rhythm of the pulse, which are generated by pressures such as float, medium, and sink, are called pulse images. Through the pulse information, Chinese medicine can understand the physiological state of the patient. However, for a long time, the description of these pulse patterns by Chinese medicine theory is a method of metaphor of natural phenomena. This method of description has great subjectivity, and the concept of pulse is very general and fuzzy, making the diagnosis process difficult to reproduce and difficult. Learn and master. In order to solve the shortcomings of the traditional Chinese medicine pulse diagnosis, many researchers have made unremitting efforts in the objectification of the pulse diagnosis for many years. The key to the objectification of TCM pulse diagnosis is the acquisition of high quality pulse signals. With the continuous advancement of sensor technology, more and more pulse sensors have been designed. The existing TCM pulse or pulse image acquisition sensors mainly use pressure sensors, such as piezoelectric film sensors, and existing piezoelectric film sensors. The detection principle is that an electrical signal (charge or voltage) is generated between the upper and lower electrode surfaces of the film when the film is deformed, and is proportional to the stretched or curved shape, so that the deformation of the surface can be detected. However, the surface of the piezoelectric film sensor electrode is easily affected by human body static electricity or external electromagnetic fields, resulting in inaccurate data.

 [Summary of the Invention]

The technical problem to be solved by the present invention is to provide a surface strain detecting device and a surface strain sensor, which can improve the accuracy of surface strain detection and avoid external interference.

In order to solve the above technical problem, a technical solution adopted by the present invention is to provide a surface strain sensor including: a light reflecting film for deforming according to a pressure change of a surface to be tested; a transparent connecting layer, and light The reflective film is stacked; the first optical fiber array and the second optical fiber array each include a plurality of optical fibers, the first ends of the plurality of optical fibers are connected to the transparent connecting layer, and the plurality of connecting positions of the plurality of optical fibers and the transparent connecting layer are transparent The connection layer is arranged in a matrix; the light emitter array comprises a plurality of light emitters, and the light emitters are connected in one-to-one correspondence with the second ends of the plurality of fibers in the first fiber array; the light receiver array comprises a plurality of light The receiver and the optical receiver are connected in one-to-one correspondence with the second ends of the plurality of optical fibers in the second optical fiber array; wherein the reflective surface of the light reflecting film faces the transparent connecting layer, the light emitter is used to emit light, and the light receiver is used for receiving Light reflected back by the light reflecting film to enable a processor to position light emitters in accordance with the light emitters that emit light and receive light One correspondence relationship between the position of the receiver in the optical receiver array characterized by acquiring an electrical signal in real time of the deformable surface to be measured.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a surface strain detecting device including a surface strain sensor and a processor, and a surface strain sensor comprising: a light reflecting film for being tested The pressure of the surface is deformed by deformation; the transparent connecting layer is disposed in a stacked manner with the light reflecting film; the first optical fiber array and the second optical fiber array each include a plurality of optical fibers, and the first ends of the plurality of optical fibers are connected to the transparent connecting layer, and a plurality of connection locations of the plurality of optical fibers and the transparent connection layer are distributed in a matrix on the transparent connection layer; the light emitter array includes a plurality of light emitters, the light emitters and the second ends of the plurality of fibers in the first fiber array a one-to-one correspondence; the optical receiver array includes a plurality of optical receivers, and the optical receivers are connected in one-to-one correspondence with the second ends of the plurality of optical fibers in the second optical fiber array; wherein the reflective surface of the light reflecting film faces the transparent connection a layer, the light emitter is for emitting light, the light receiver is for receiving light reflected by the light reflecting film; the processor is connected with the plurality of light emitters and the plurality of light emitters The devices are all electrically connected for obtaining a characterization of the surface to be tested according to a one-to-one correspondence between the position of the light emitter emitting the light emitter in the array of light emitters and the position of the light receiver receiving the light in the array of light receivers. Real-time deformation of electrical signals.

The beneficial effects of the present invention are: different from the prior art, the present invention provides a surface strain sensor comprising: a light reflecting film for deforming according to a pressure change of a surface to be tested; a transparent connecting layer, and The light-reflecting film is stacked; the first fiber array and the second fiber array each include a plurality of fibers, and the first ends of the plurality of fibers are connected to the transparent connecting layer, and the plurality of connecting positions of the plurality of fibers and the transparent connecting layer are at The transparent connection layer is arranged in a matrix; the light emitter array comprises a plurality of light emitters, and the light emitters are connected in one-to-one correspondence with the second ends of the plurality of fibers in the first fiber array; the light receiver array comprises a plurality of The light receiver is connected to the second ends of the plurality of fibers in the second fiber array in a one-to-one correspondence; wherein the light reflecting surface of the light reflecting film faces the transparent connecting layer, the light emitter is used for emitting light, and the light receiver is used for the light receiver Receiving light reflected back by the light reflecting film to enable a processor to position light emitters in accordance with the light emitters that emit light and receive light The one-to-one correspondence between the positions of the receivers in the optical receiver array acquires an electrical signal that characterizes the real-time deformation of the surface to be tested. Since the front end uses the optical signal to receive the deformation of the surface of the object to be tested, it can avoid external interference and can improve The accuracy of surface strain detection.

 [Description of the Drawings]

1 is a schematic structural view of a surface strain sensor according to a first embodiment of the present invention;

1a is a schematic top plan view of a transparent connection layer according to an embodiment of the present invention;

2 is a schematic view showing the principle of a surface strain sensor according to an embodiment of the present invention;

3 is a schematic structural view of a surface strain sensor according to a second embodiment of the present invention;

4 is a schematic structural view of a surface strain detecting device according to a third embodiment of the present invention;

Figure 5 is a schematic structural view of a surface strain detecting device according to a fourth embodiment of the present invention;

Figure 6 is a partially exploded perspective view of the surface strain detecting device of Figure 5;

Figure 7 is a schematic structural view of a surface strain detecting device according to a fifth embodiment of the present invention;

Fig. 8 is a partially exploded perspective view showing the surface strain detecting device of Fig. 7.

【Detailed ways】

1 and FIG. 1a, FIG. 1 is a schematic structural view of a surface strain sensor according to a first embodiment of the present invention, and FIG. 1a is a schematic top view of a transparent connecting layer according to an embodiment of the present invention. In the present embodiment, the surface strain sensor includes a light emitting film 11, a transparent connecting layer 12, a first fiber array 13, a second fiber array 14, a light emitter array 15, and a light receiver array 16.

The light reflecting surface of the light reflecting film 11 faces the transparent connecting layer 12. The light reflecting film 11 is used to deform as the pressure of the surface to be tested changes during measurement.

The transparent connecting layer 12 is laminated with the light reflecting film 11, and the transparent connecting layer 12 is disposed on a side of the light reflecting film 11 away from the surface to be tested.

The first fiber array 13 includes a plurality of fibers 131, and the second fiber array 14 includes a plurality of fibers 141. The first ends of the plurality of optical fibers 131 and the plurality of optical fibers 141 are both connected to the transparent connecting layer 12.

Only a plurality of optical fibers 131 or 141 of one dimension are shown in FIG. 1, and it will be understood by those skilled in the art that they should actually be two dimensions. As shown in FIG. 1a, the first fiber array 13 and the second fiber array 14 are separately disposed. For example, the first fiber array 13 is connected to the left half region on the transparent connection layer 12, and the second fiber array 14 is connected to the transparent connection. The right half area on layer 12. A plurality of optical fibers 131 are disposed in both the vertical and horizontal directions of the left half region of the transparent connecting layer 12, and a plurality of optical fibers 141 are disposed in both the vertical and horizontal directions of the right half region of the transparent connecting layer 12. A plurality of connection positions of the plurality of optical fibers 141 and the right half region of the transparent connection layer 12 are distributed in a matrix on the transparent connection layer 12, and a plurality of connection positions of the plurality of optical fibers 131 and the left half region of the transparent connection layer 12 are transparent. The connection layer 12 is distributed in a matrix.

The light emitter array 15 includes a plurality of light emitters 151 that are connected in one-to-one correspondence with the second ends of the plurality of fibers 131 in the first fiber array 13.

The optical receiver array 16 includes a plurality of optical receivers 161 that are connected in one-to-one correspondence with the second ends of the plurality of optical fibers 141 in the second optical fiber array 14.

The light emitter 151 is for emitting light, and the light receiver 161 is for receiving the light reflected back by the light reflecting film 11 so that a processor can be positioned according to the position of the light emitter 151 emitting light in the light emitter array 15 and A one-to-one correspondence of the positions of the light receivers 161 that receive the light in the light receiver array 16 acquires electrical signals that characterize the real-time deformation of the surface to be tested.

In one embodiment, the processor identifies the light emitter 151 according to a corresponding position of each light emitter 151 in the light emitter array 15, for example, controlling a specific position of the light emitter 151 to emit light of a corresponding parameter, The processor is caused to determine which light emitter 151 emits light based on the corresponding parameters of the light received by the light receiver 161. For example, the parameters of the light may be light intensity, light frequency, and the like. Alternatively, the light emitted by the light emitters 151 at various locations may be encoded differently to achieve identification of the light emitted by the different light emitters 151.

In another embodiment, the processor can control the light emitters 151 in the light emitter array 15 to emit light in a predetermined sequence (eg, row by row according to the matrix distribution position of the light emitter array 15 Columns are emitted, etc., to enable the processor to correspond the light received by the light receiver 151 to the light emitter 151 in accordance with the order of the light received by the light receiver 151.

Please refer to FIG. 2. FIG. 2 is a schematic diagram of the principle of the surface strain sensor according to the embodiment of the present invention.

A one-to-one correspondence between the position of the light emitter 151 in the light emitter array 15 and the position of the light receiver 161 receiving the light in the light receiver array 16 according to the emitted light of the emitted light will be described below with reference to FIG. An electrical signal that characterizes the real-time deformation of the surface to be tested is specifically described.

As shown in FIG. 2, the first ends of the plurality of optical fibers 131 and the plurality of optical fibers 141 and the plurality of connection positions of the transparent connecting layer 12 are on the same plane S, and the plane is defined as the reference plane S. The thickness of the light reflecting film 11 may be from 1 to 100 μm, and the thickness thereof is negligible.

Taking the light emitted from the left seventh light emitter 151 in the light emitter array 15 shown in FIG. 2 as an example, which is reflected by the light reflecting film 11 deformed with the surface to be tested, the light receiver is The fourth light receiver 161 from the left in the array 16 is received, so that it can be determined that the light emitted from the first end A of the seventh fiber from the left is incident from the first end B of the twelfth fiber from the left. Come back, since the angle of the exit (for example, 90 degrees) and the angle of incidence (for example, the angle α) can be read by the light emitter 151 and the light receiver 161, the reflection point C on the light reflection film 11 can be determined by the principle of the triangle. position.

It is not difficult to be understood by those skilled in the art that, according to the above principle, the positions of the plurality of reflection points on the light reflection film 11 can be determined according to the corresponding positional relationship of the plurality of groups of the light emitters 151 and the light receivers 161, and the positions of the plurality of reflection points are obtained according to the positions of the plurality of reflection points. A real-time deformed electrical signal characterizing the surface to be tested.

Please refer to FIG. 3. FIG. 3 is a schematic structural view of a surface strain sensor according to a second embodiment of the present invention. In the present embodiment, the surface strain sensor includes a light reflecting film 21, a transparent connecting layer 22, a first fiber array 23, a second fiber array 24, a light emitter array 25, a light receiver array 26, and a flexible protective layer 27.

The light reflecting surface of the light reflecting film 21 faces the transparent connecting layer 22, and the light reflecting film 21 is used for deformation at the time of measurement as the pressure of the surface to be tested changes. Optionally, the light reflecting film 21 includes a pressure strain film 211 and a reflective plating layer 212 disposed on the surface of the pressure strain film 211 away from the transparent connecting layer 22. Optionally, the reflective coating 212 is a silver plating. In other embodiments, the emissive plating layer 212 may also be a plating layer of other materials as long as the reflective effect can be achieved. The invention is not limited thereto.

The transparent connecting layer 22 is laminated on the light reflecting film 21. Optionally, the transparent connecting layer 22 includes a transparent flexible base layer 221 and a transparent connecting substrate layer 222. The transparent flexible base layer 221 is disposed on a surface of the light reflecting film 21 away from the surface to be tested. The material of the transparent flexible base layer 221 is a flexible material, such as a flexible plastic, which can prevent the hard material from affecting the deformation sensitivity of the light reflecting film 21.

The transparent connection substrate layer 222 is disposed on a surface of the transparent flexible base layer 221 away from the light reflection film 21.

The first fiber array 23 includes a plurality of fibers 231, and the second fiber array 24 includes a plurality of fibers 241. The first ends of the plurality of fibers 231 and the plurality of fibers 241 are connected to the transparent connecting layer 22, and the plurality of connecting positions of the plurality of fibers 241 and the transparent connecting layer 22 are distributed in a matrix on the transparent connecting layer 22.

Optionally, the first ends of the plurality of optical fibers 231 and the plurality of optical fibers 242 are both connected to the transparent connecting substrate layer 222, and the plurality of connecting ends of the plurality of optical fibers 231 and the plurality of optical fibers 242 and the transparent connecting substrate layer 222 are transparently connected. The matrix layer 222 is distributed in a matrix. Optionally, the transparent connecting substrate layer 222 is made of a hard material to ensure that the plurality of connecting positions of the plurality of optical fibers 241 and the plurality of optical fibers 242 and the transparent connecting substrate layer 122 do not change according to the pressure change of the surface to be tested, and can be used as a stable Base plane.

The light emitter array 25 includes a plurality of light emitters 251 that are connected in one-to-one correspondence with the second ends of the plurality of fibers 231 in the first fiber array 23.

The optical receiver array 26 includes a plurality of optical receivers 261 that are connected in one-to-one correspondence with the second ends of the plurality of optical fibers 241 in the second optical fiber array 24.

The light emitter 251 is for emitting light, and the light receiver 261 is for receiving the light reflected back by the light reflecting film 21 so that a processor can be positioned according to the position of the light emitter 251 emitting light in the light emitter array 25 and A one-to-one correspondence of the positions of the light receivers 261 that receive the light in the light receiver array 26 acquires electrical signals that characterize the real-time deformation of the surface to be tested. For details, please refer to the description above for details.

Optionally, the flexible protective layer 27 is disposed on the surface of the light reflecting film 21 away from the transparent connecting layer 22, and the flexible protective layer 27 is in close contact with the surface to be tested during pressure measurement.

Optionally, the surface strain sensor is a pulse sensor for detecting the pulse of the human body. For example, the surface to be tested is the surface of the human skin and is located at the position of the wrist, the size, and the inch of the wrist. In other embodiments, the surface strain sensor can also be a tactile sensor, such as a tactile sensor in a robotic tactile detection device.

Referring to FIG. 4, FIG. 4 is a schematic structural view of a surface strain detecting device according to a third embodiment of the present invention. In the present embodiment, the surface strain detecting device 30 includes a processor 31 and a surface strain sensor 32 electrically connected to the processor 31.

The surface strain sensor 32 may be a surface strain sensor in any of the above embodiments.

The processor 31 may specifically be connected to each of the light emitter array and the light emitter array of the surface strain sensor of any of the above embodiments.

The processor 31 acquires a representation of the real-time deformation of the surface to be tested based on a one-to-one correspondence between the position of the light emitter emitting the light emitter in the array of light emitters and the position of the light receiver receiving the light in the array of light receivers. signal.

Specifically, the processor determines the position of the reflection point of the light on the light reflecting film according to the position of the light emitter that emits the light in the light emitter array and the position of the light receiver that receives the light in the light receiver array. And determining a position of the plurality of reflection points on the light reflection film according to the corresponding positional relationship of the plurality of light emitters and the light receiver, and acquiring an electrical signal representing the real-time deformation of the surface to be tested according to the positions of the plurality of reflection points. For details, please refer to the description above for details.

The surface strain detecting device may be a pulse detecting device or a robotic tactile sensing device.

Referring to FIG. 5 and FIG. 6, FIG. 5 is a schematic structural view of a surface strain detecting device according to a fourth embodiment of the present invention. Figure 6 is a partially exploded perspective view of the surface strain detecting device of Figure 5.

In the present embodiment, the surface strain detecting device may be a pulse detecting device. The surface strain detecting device includes a processor 411 and a surface strain sensor 42 electrically connected to the processor 411.

In this embodiment, the processor 411 is the processor 411 of the host computer 41. The host computer 41 can be a personal computer. In other embodiments, the host computer 41 may also be other terminal devices with a processor, such as a mobile phone, a tablet computer, or the like.

The surface strain sensor 42 may be a surface strain sensor in any of the above embodiments.

Processor 411 may specifically be coupled to each of the light emitter array and the light emitter array.

In the present embodiment, the surface strain detecting device may further include a base 43.

The surface strain sensor 42 is disposed on the base 43. The surface strain sensor 42 can be disposed directly or indirectly on the base 43

In one embodiment, the base 43 can include a first section 431 and a second section 432. The first section 431 is a closed loop that can be opened and closed, the second section 432 is provided with a recess 4321, and the surface strain sensor 42 is disposed at Inside the first segment 431, during measurement, the human wrist is received in the first segment 431 and the forearm of the human body is received in the recess. A closed loop that can be opened and closed means that the closed loop can be opened and closed after the wrist is placed.

In an embodiment, an air bag 44 may also be provided in the first section, and a surface strain sensor 42 may be disposed on the surface of the air bag 44 away from the first section 431.

Referring to FIG. 7 and FIG. 8, FIG. 7 is a schematic structural view of a surface strain detecting device according to a fifth embodiment of the present invention. Fig. 8 is a partially exploded perspective view showing the surface strain detecting device of Fig. 7. In the present embodiment, the surface strain detecting device may be a pulse detecting device.

The surface strain detecting device includes a processor 511 and a surface strain sensor 51 electrically connected to the processor 511.

In this embodiment, the processor 511 is the processor 511 of the upper computer 51.

The surface strain sensor 52 may be a surface strain sensor in any of the above embodiments.

Processor 511 may specifically be coupled to each of the light emitter array and the light emitter array.

In this embodiment, the surface strain detecting device may further include an annular wristband 52 and a pressing member 53. The annular wristband 52 is provided with a through hole a, the surface strain sensor 52 is disposed in the through hole a, and the pressing member 53 is inserted in the In the through hole a, the surface strain sensor 52 is disposed on a surface of the pressing member 53 near the inner side of the endless wristband 52, and specifically may be disposed on the lower end surface of the pressing member 53.

Alternatively, the number of the through holes a, the pressing member 53, and the surface strain sensor 52 may be three. The positions of the three surface strain sensors 52 may correspond to three positions of the human body's ruler, off, and inch, respectively.

Optionally, the endless wristband 52 includes an elastic band 521 and a mounting portion 522, and the through hole a is disposed on the mounting portion 522.

Different from the prior art, the present invention provides a surface strain sensor comprising: a light reflecting film for deforming according to a pressure change of a surface to be tested; a transparent connecting layer, which is laminated with the light reflecting film; An optical fiber array and a second optical fiber array each include a plurality of optical fibers, and the first ends of the plurality of optical fibers are connected to the transparent connecting layer, and the plurality of connecting positions of the plurality of optical fibers and the transparent connecting layer are arranged in a matrix on the transparent connecting layer. a light emitter array comprising a plurality of light emitters, the light emitters being connected in one-to-one correspondence with the second ends of the plurality of fibers in the first fiber array; the light receiver array comprising a plurality of light receivers, the light receivers Connected to the second end of the plurality of fibers in the second fiber array in a one-to-one correspondence; wherein the light reflecting surface of the light reflecting film faces the transparent connecting layer, the light emitter is used to emit light, and the light receiver is used for receiving the light reflecting film back Light to enable a processor to be based on the position of the light emitter that emits light in the array of light emitters and the light receiver that receives the light from the light receiver array One correspondence between the position of obtaining an electric signal in real time to characterize the deformation of the surface to be measured, the strain can be improved detection accuracy of the surface, to avoid outside interference.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims (20)

A surface strain sensor, characterized in that the surface strain sensor comprises: a light reflecting film for deforming with a change in pressure of a surface to be tested; a transparent connecting layer disposed on the light reflecting film; The first fiber array and the second fiber array each include a plurality of fibers, the first ends of the plurality of fibers are connected to the transparent connecting layer, and the plurality of fibers are connected to the transparent connecting layer Positions are distributed in a matrix on the transparent connecting layer; The light emitter array includes a plurality of light emitters, and the light emitters are connected in one-to-one correspondence with the second ends of the plurality of fibers in the first fiber array; The optical receiver array includes a plurality of optical receivers, and the optical receivers are connected to the second ends of the plurality of optical fibers in the second optical fiber array in a one-to-one correspondence; Wherein the light reflecting surface of the light reflecting film faces the transparent connecting layer, the light emitter is used to emit light, and the light receiver is configured to receive light reflected by the light reflecting film to enable a processor to Obtaining a real-time characterizing the surface to be tested according to a one-to-one correspondence between a position of the light emitter that emits light in the array of light emitters and a position of the light receiver that receives the light in the array of light receivers Deformed electrical signal. The surface strain sensor according to claim 1, wherein the light reflecting film comprises a pressure strain film and a reflective plating layer disposed on a surface of the pressure strain film away from the transparent connecting layer. The surface strain sensor according to claim 2, wherein the reflective plating layer is a silver plating layer. The surface strain sensor according to claim 1, wherein the transparent connecting layer comprises a transparent flexible base layer and a transparent connecting substrate layer, the transparent flexible base layer being disposed on a surface of the light reflecting film away from the surface to be tested The transparent connecting substrate layer is disposed on the surface of the transparent flexible base layer away from the light reflecting film, the first ends of the plurality of optical fibers are connected to the transparent connecting matrix layer, and the plurality of optical fibers and the optical fibers are A plurality of connection locations of the transparent connection matrix layer are distributed in a matrix on the transparent connection substrate layer. The surface strain sensor according to claim 2, wherein the transparent connecting substrate layer is made of a hard material to ensure that a plurality of connecting positions of the plurality of optical fibers and the transparent connecting substrate layer do not follow the surface to be tested. The pressure changes and changes. The surface strain sensor according to claim 1, wherein the surface strain sensor further comprises a flexible protective layer disposed on a surface of the light reflecting film away from the transparent connecting layer, the flexible protection during pressure measurement The layer is in close contact with the surface to be tested. The surface strain sensor of claim 1 wherein the surface strain sensor is a pulse sensor or a tactile sensor.  A surface strain detecting device, characterized in that the surface strain detecting device comprises a surface strain sensor and a processor, The surface strain sensor includes: a light reflecting film for deforming with a change in pressure of a surface to be tested; a transparent connecting layer disposed on the light reflecting film; The first fiber array and the second fiber array each include a plurality of fibers, the first ends of the plurality of fibers are connected to the transparent connecting layer, and the plurality of fibers are connected to the transparent connecting layer Positions are distributed in a matrix on the transparent connecting layer; The light emitter array includes a plurality of light emitters, and the light emitters are connected in one-to-one correspondence with the second ends of the plurality of fibers in the first fiber array; The optical receiver array includes a plurality of optical receivers, and the optical receivers are connected to the second ends of the plurality of optical fibers in the second optical fiber array in a one-to-one correspondence; Wherein the light reflecting surface of the light reflecting film faces the transparent connecting layer, the light emitter is used to emit light, and the light receiver is configured to receive light reflected by the reflecting film; The processor is electrically coupled to the plurality of light emitters and the plurality of light receivers for receiving light in accordance with a position of the light emitter that emits light and receiving light A one-to-one correspondence of the positions of the devices in the array of light receivers obtains electrical signals characterizing the real-time deformation of the surface to be tested. The surface strain detecting device according to claim 8, wherein the light reflecting film comprises a pressure strain film and a reflective plating layer disposed on a surface of the pressure strain film away from the transparent connecting layer. The surface strain detecting device according to claim 9, wherein the reflective plating layer is a silver plating layer. The surface strain detecting device according to claim 8, wherein the transparent connecting layer comprises a transparent flexible base layer and a transparent connecting base layer, and the transparent flexible base layer is disposed on the light reflecting film away from the surface to be tested. a transparent connecting substrate layer disposed on the surface of the transparent flexible substrate away from the light reflecting film, a first end of the plurality of optical fibers being connected to the transparent connecting substrate layer, and the plurality of optical fibers and A plurality of connection locations of the transparent connection matrix layer are distributed in a matrix on the transparent connection substrate layer. The surface strain detecting device according to claim 9, wherein the transparent connecting substrate layer is made of a hard material to ensure that a plurality of connection positions of the plurality of optical fibers and the transparent connecting substrate layer do not follow the test The pressure on the surface changes. The surface strain detecting apparatus according to claim 8, wherein said processor is based on a position of said light emitter that emits light in said array of light emitters and said light receiver of said light receiver that receives light The position in the receiver array determines the position of the reflection point of the light on the light reflection film, and determines the position of the plurality of reflection points on the light reflection film according to the corresponding positional relationship of the plurality of groups of the light emitter and the light receiver, according to The position of the reflection points acquires an electrical signal characterizing the real-time deformation of the surface to be tested. The surface strain detecting device according to claim 8, wherein the surface strain detecting device is a pulse detecting device. The surface strain detecting device according to claim 14, wherein said surface strain detecting means further comprises a base, and said surface strain sensor is disposed on said base. The surface strain detecting device according to claim 15, wherein said base includes a first segment and a second segment, said first segment being a closable closed ring and said second segment being concave a groove, the surface strain sensor is disposed inside the first segment, and when measured, the human wrist is received in the first segment and the human forearm is received in the groove. The surface strain detecting device according to claim 16, wherein an airbag is provided in the first section, and the surface strain sensor is disposed on a surface of the airbag away from the first section. The surface strain detecting device according to claim 14, wherein the surface strain detecting device further comprises an endless wristband and a pressing member, the annular wristband is provided with a through hole, and the surface strain sensor is disposed at the The pressing member is adjacent to a surface of the inner side of the annular wristband, and the pressing member is inserted in the through hole. The surface strain detecting device according to claim 18, wherein the number of the through holes, the pressing member, and the surface strain sensor are all three. The surface strain detecting device according to claim 8, wherein the surface strain detecting device is a robot tactile sensing device.