Pulse acquisition device based on optical fiber

Abstract

The utility model relates to a pulse acquisition device based on optical fibers, belongs to the field of pulse diagnosis instruments, and solves the problems that the pulse diagnosis instruments in the prior art are low in sensitivity and accuracy and cannot adjust pressing force. Comprising an optical fiber pressure sensing head, a telescopic rod mechanism, a lever mechanism and an optical signal demodulator, the optical fiber pressure sensing head is used for being in contact with the wrist of a user; the pulse sensor is internally provided with an optical fiber and captures a pulse beating signal and a pressure signal of a user through the change of an optical signal in the optical fiber; the optical fiber pressure sensing head and the telescopic rod mechanism are arranged at the two ends of the lever mechanism respectively, and the height of the optical fiber pressure sensing head is adjusted through stretching and retracting of a telescopic head in the telescopic rod mechanism. And the optical signal demodulator is connected with the optical fiber in the optical fiber pressure sensing head and is used for demodulating an optical signal in the optical fiber. The pulse collecting device is high in sensitivity and accuracy and capable of adjusting pressing force at different positions.

Description

Technical Field

[0001] The utility model relates to the field of traditional Chinese medicine pulse diagnosis instruments, in particular to a pulse collection device based on optical fiber. Background Art

[0002] With the continuous development of information technology, the TCM industry is welcoming broad development space and opportunities. Among them, the digitization of TCM pulse diagnosis is of great significance for improving the level of TCM diagnosis and treatment, inheriting TCM culture, and providing convenient medical services.

[0003] The core concept of TCM Cunkou pulse diagnosis is to apply different levels of pressure to the radial artery, such as floating, middle and sinking, while measuring the pulse fluctuations of the radial artery at the three positions of Cun, Guan and Chi, and then make a comprehensive diagnosis based on the pulse waves under different pressures and other related signs.

[0004] Most existing pulse diagnosis instruments use a combination of air pumps and air bags to simulate the finger pressure during TCM pulse diagnosis. Although this design approximates the TCM pulse diagnosis scenario to some extent, it is still a long way from the TCM method of directly touching the radial artery with the finger, and the sensitivity and accuracy are not high enough. In addition, during the TCM pulse diagnosis process, the TCM doctor will adjust the pressure of the three positions in real time according to the pressure felt by the finger, but the existing pulse diagnosis instruments all have fixed pressure. Utility Model Content

[0005] In view of the above analysis, the utility model aims to provide a pulse acquisition device based on optical fiber to solve the problems of low sensitivity and accuracy of existing pulse diagnosis instruments and the inability to adjust the pressing force.

[0006] The purpose of this utility model is mainly achieved through the following technical solutions:

[0007] A pulse collection device based on optical fiber, comprising an optical fiber pressure sensor head, a telescopic rod mechanism, a lever mechanism and an optical signal demodulator;

[0008] The optical fiber pressure sensor head is used to contact the user's wrist; an optical fiber is arranged inside the sensor head, and the pulse beat signal and pressure signal of the user are captured through the change of the optical signal in the optical fiber;

[0009] The optical fiber pressure sensor head and the telescopic rod mechanism are respectively arranged at two ends of the lever mechanism, and the height of the optical fiber pressure sensor head is adjusted by telescoping the telescopic head in the telescopic rod mechanism;

[0010] The optical signal demodulator is connected to the optical fiber inside the optical fiber pressure sensor head and is used to demodulate the optical signal in the optical fiber.

[0011] A further improvement based on the above solution also includes a base;

[0012] The lever mechanism is parallel to the base, and the middle part is fixedly connected to the base through a support member;

[0013] The telescopic rod mechanism comprises a sleeve and a telescopic head; the sleeve is fixedly connected to the base, and the telescopic head is connected to the lower part of one end of the lever mechanism; the optical fiber pressure sensor head is fixedly connected to the other end of the lever mechanism.

[0014] Based on the further improvement of the above solution, the optical fiber pressure sensor head includes a housing and an optical fiber elastic component arranged inside the housing;

[0015] The top of the housing is fixedly connected to the lever mechanism;

[0016] The optical fiber elastic component is provided with an optical fiber, and a protrusion is provided at the lower part where it contacts the user's arm.

[0017] Based on the further improvement of the above solution, the optical fiber is a fiber Bragg grating; the optical fiber elastic component includes an elastic diaphragm, a fiber Bragg grating and a silicone block; wherein:

[0018] The bottom of the shell is flattened and fixed with the elastic membrane; the optical fiber grating is fixed above the elastic membrane, and the silica gel block is fixed below to form the protrusion.

[0019] Based on the further improvement of the above solution, the optical fiber elastic component includes, from top to bottom, a first silicone block, an upper microbend component, an optical fiber, a lower microbend component, and a second silicone block, wherein:

[0020] The optical fiber is clamped laterally between the upper slightly bent component and the lower slightly bent component; the first silicone block is located at the top of the shell, and the lower side of the second silicone block is convex at the point where it contacts the user's arm.

[0021] Based on the further improvement of the above scheme, the number of the fiber optic pressure sensor heads, lever mechanisms and telescopic rod mechanisms are three, forming three sets of identical units arranged in parallel, and the three fiber optic pressure sensor heads correspond to the three positions of Cun, Guan and Chi on the radial artery of the user's arm respectively.

[0022] Based on the further improvement of the above solution, the number of the optical signal demodulator is one, which is connected to the three optical fiber pressure sensor heads respectively.

[0023] Based on the further improvement of the above solution, the telescopic rod mechanism is electrically controlled.

[0024] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0025] 1. Compared with the existing pulse diagnosis instrument which uses a combination of air pump and air bag to simulate the finger pressing during TCM pulse diagnosis, the telescopic rod mechanism combined with the lever mechanism proposed in the utility model can adjust the pressing force, which is closer to the actual pulse diagnosis scenario of TCM.

[0026] 2. Compared with piezoelectric sensors that can only measure dynamic quantities but not static quantities, the utility model uses an optical fiber sensor head to collect the optical signal of the arm, and then uses an optical signal demodulator to obtain the pulse signal and pressure signal of that position. It can not only measure dynamic quantities (pulse wave signals) but also static quantities (static pressure signals), and has the advantages of high sensitivity, high resolution, and strong anti-interference ability.

[0027] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the following content, and some advantages can be obvious from the description or understood by implementing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the contents specifically pointed out in the text and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. In the entire drawings, the same reference symbols represent the same components.

[0029] Figure 1 This is a structural diagram of a pulse collection device based on optical fiber shown in one embodiment of the utility model;

[0030] Figure 2 This is a structural diagram of an optical fiber pressure sensor head 1 shown in one embodiment of the utility model;

[0031] Figure 3 This is a structural diagram of another optical fiber pressure sensor head 1 shown in one embodiment of the utility model;

[0032] Diagram: 1-fiber pressure sensor head 2-optical signal demodulator 3-base 4-lever mechanism 5-telescopic rod mechanism 11-housing 12-elastic diaphragm 13-fiber grating 14-silicon block 15-first silicone block 16-second silicone block 17-upper slightly bent component 18-optical fiber 19-lower slightly bent component DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0034] A specific embodiment of the utility model discloses a pulse collection device based on optical fiber, such as Figure 1 As shown, it includes an optical fiber pressure sensor head 1, a telescopic rod mechanism 5, a lever mechanism 4 and an optical signal demodulator 2;

[0035] The optical fiber pressure sensor head is used to contact the user's wrist; an optical fiber is arranged inside the sensor head, and the pulse beat signal and pressure signal of the user are captured through the change of the optical signal in the optical fiber;

[0036] The optical fiber pressure sensor head and the telescopic rod mechanism are respectively arranged at two ends of the lever mechanism, and the height of the optical fiber pressure sensor head is adjusted by telescoping the telescopic head in the telescopic rod mechanism;

[0037] The optical signal demodulator is connected to the optical fiber inside the optical fiber pressure sensor head and is used to demodulate the optical signal in the optical fiber.

[0038] It should be noted that there are three fiber optic pressure sensor heads, lever mechanisms and telescopic rod mechanisms, which constitute three sets of identical units arranged in parallel. The three fiber optic pressure sensor heads correspond to the three positions of Cun, Guan and Chi on the radial artery of the user's arm respectively.

[0039] When in use, the user places the arm under the fiber optic pressure sensor head and adjusts the positions of the three fiber optic pressure sensor heads to correspond to the upper cun, guan and chi of the radial artery of the user's arm. The extension and retraction of the telescopic rod drives the angle of the lever mechanism, thereby changing the pressure of the fiber optic pressure sensor head on the user's arm, thus realizing a pulse diagnosis method with adjustable pressure.

[0040] It should be noted that the pulse collection device disclosed in this embodiment also includes a base 3; the lever mechanism is parallel to the base, and the middle position is fixedly connected to the base through a support; the telescopic rod mechanism includes a sleeve and the telescopic head; the sleeve is fixedly connected to the base, and the telescopic head is connected to the lower part of one end of the lever mechanism; the optical fiber pressure sensor head is fixedly connected to the other end of the lever mechanism.

[0041] It is worth noting that the fiber optic pressure sensor head includes a shell and a fiber optic elastic component arranged inside the shell; the top of the shell is fixedly connected to the lever mechanism; the fiber optic elastic component has an optical fiber inside, and a protrusion is provided at the lower part where it contacts the user's arm.

[0042] An optional implementation method, such as Figure 2 As shown, the optical fiber in the optical fiber pressure sensor head 1 is an optical fiber Bragg grating; the optical fiber elastic component includes an elastic diaphragm 12, an optical fiber Bragg grating 13 and a silicone block 14; wherein: the bottom of the shell 11 is flattened and fixed with the elastic diaphragm; the optical fiber Bragg grating is fixed above the elastic diaphragm, and the silicone block is fixed below to form the protrusion.

[0043] Specifically, the user places the arm on the base and places the three fiber optic pressure sensor heads at the arm's inch, close and foot positions. After the arm contacts the fiber optic pressure sensor head, the silicone block in the sensor head undergoes elastic deformation and is transmitted to the elastic diaphragm, which then deforms, causing the grating pitch of the fiber grating fixed on the elastic diaphragm to change, causing the wavelength of the reflected light of the fiber grating to change. The optical signal demodulator can obtain the signal acting on the silicone block in the sensor head by detecting the change in the wavelength of the reflected light.

[0044] Another optional implementation method, such as Figure 3 As shown, the optical fiber elastic component in the optical fiber pressure sensor head 1 includes, from top to bottom, a first silicone block 15, an upper micro-bend component 17, an optical fiber 18, a lower micro-bend component 19 and a second silicone block 16, wherein: the optical fiber is laterally clamped between the upper micro-bend component and the lower micro-bend component; the first silicone block is located at the top of the outer shell 11, and the lower side of the second silicone block is convex in contact with the user's arm.

[0045] Specifically, the user places the arm on the base and places the three fiber optic pressure sensor heads at the arm's inch, close and foot positions. After the arm contacts the fiber optic pressure sensor head, the second silicone block in the sensor head moves and elastically deforms, reducing the distance between the upper micro-bend component and the lower micro-bend component, causing the optical fiber to bend slightly on its path, changing the optical transmission loss of the optical fiber. Light is input at one end of the optical fiber and output at the other end. The signal acting on the second silicone block in the sensor head can be obtained by detecting the change in the light intensity of the output light relative to the input light through an optical signal demodulator.

[0046] It should be noted that the optical signals collected by the three optical fiber pressure sensor heads all pass through an optical signal demodulator, which converts the optical signals into electrical signals. The electrical signals include AC signals and DC signals; the AC signals are pulse wave signals, and the DC signals are pressure signals.

[0047] Exemplarily, the telescopic rod mechanism is electrically controlled, and the higher the telescopic head protrudes, the closer the fiber optic pressure sensor head is to the arm through the lever mechanism, and the greater the pressure on the arm; three sets of telescopic rod mechanisms respectively control the three fiber optic pressure sensor heads, thereby realizing different pressure control of the three positions of Cun, Chi and Guan in this embodiment.

[0048] Compared with the prior art, the fiber-optic pulse acquisition device provided in this embodiment uses a telescopic rod mechanism combined with a lever mechanism to apply different pressures to the radial artery Cun, Guan and Chi, and adjusts the pressing force at the three positions to simulate the finger pressing during Chinese medicine pulse diagnosis, which is closer to the actual pulse diagnosis scenario of Chinese medicine. In addition, this embodiment uses a fiber-optic sensor head to collect the optical signal of the arm, and then uses an optical signal demodulator to convert the optical signal into an electrical signal, thereby obtaining the pulse signal and pressure signal at that position. Among them, the fiber-optic sensor head has a high sensitivity and can promptly reflect the slight changes in the pulse, and can obtain a pulse signal with high sensitivity and accuracy.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A pulse collection device based on optical fiber, characterized in that: It includes an optical fiber pressure sensor head, a telescopic rod mechanism, a lever mechanism and an optical signal demodulator; The optical fiber pressure sensor head is used to contact the user's wrist; It has an optical fiber inside, which can capture the pulse beat and pressure signals of the user through the changes of the optical signal in the optical fiber; The optical fiber pressure sensor head and the telescopic rod mechanism are respectively arranged at two ends of the lever mechanism, and the height of the optical fiber pressure sensor head is adjusted by telescoping the telescopic head in the telescopic rod mechanism; The optical signal demodulator is connected to the optical fiber inside the optical fiber pressure sensor head and is used to demodulate the optical signal in the optical fiber.

2. The optical fiber-based pulse acquisition device according to claim 1, characterized in that: Also includes a base; The lever mechanism is parallel to the base, and the middle part is fixedly connected to the base through a support member; The telescopic rod mechanism comprises a sleeve and a telescopic head; the sleeve is fixedly connected to the base, and the telescopic head is connected to the lower part of one end of the lever mechanism; the optical fiber pressure sensor head is fixedly connected to the other end of the lever mechanism.

3. The pulse acquisition device according to claim 1, characterized in that: The optical fiber pressure sensor head comprises a housing and an optical fiber elastic component arranged inside the housing; The top of the housing is fixedly connected to the lever mechanism; The optical fiber elastic component is provided with an optical fiber, and a protrusion is provided at the lower part where it contacts the user's arm.

4. The optical fiber-based pulse acquisition device according to claim 3, characterized in that: The optical fiber is a fiber grating; the optical fiber elastic component includes an elastic diaphragm, a fiber grating and a silicone block; wherein: The bottom of the shell is flattened and fixed with the elastic membrane; the optical fiber grating is fixed above the elastic membrane, and the silica gel block is fixed below to form the protrusion.

5. The optical fiber-based pulse acquisition device according to claim 3, characterized in that: The optical fiber elastic assembly comprises, from top to bottom, a first silicone block, an upper microbend component, an optical fiber, a lower microbend component, and a second silicone block, wherein: The optical fiber is clamped laterally between the upper slightly bent component and the lower slightly bent component; the first silicone block is located at the top of the shell, and the lower side of the second silicone block is convex at the point where it contacts the user's arm.

6. The optical fiber-based pulse acquisition device according to claim 1, characterized in that: The fiber optic pressure sensor heads, lever mechanisms and telescopic rod mechanisms are each three in number, forming three sets of identical units arranged in parallel. The three fiber optic pressure sensor heads correspond to the three positions of Cun, Guan and Chi on the radial artery of the user's arm, respectively.

7. The optical fiber-based pulse acquisition device according to claim 6, characterized in that: The number of the optical signal demodulator is one, which is connected to the three optical fiber pressure sensor heads respectively.

8. The pulse acquisition device based on optical fiber according to claim 1, characterized in that: The telescopic rod mechanism is electrically controlled.

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