WO2018094738A1

WO2018094738A1 - Pulse wave collection device, and pulse wave acquisition and calibration method

Info

Publication number: WO2018094738A1
Application number: PCT/CN2016/107502
Authority: WO
Inventors: 张劭龙; 张海英; 张以涛; 刘苏; 耿兴光; 侯洁娜
Original assignee: 中国科学院微电子研究所
Priority date: 2016-11-28
Filing date: 2016-11-28
Publication date: 2018-05-31

Abstract

Provided are a pulse wave collection device, and a pulse wave acquisition and calibration method. The pulse wave collection device is used to collect pulse waves at a pulse detection region (1) of the body under different external pressures. The pulse wave collection device comprises: a fixing band (10) used to wrap around a pulse detection region (1); a pressure adjustment portion (20) having a first end connected to the fixing band (10); and a pulse sensor (40) comprising a sensing film (41). A second end of the pressure adjustment portion (20) is connected to the sensing film (41) so as to tightly press the sensing film (41) against the pulse detection region (1). The sensing film (41) is used to convert a pulse wave into a piezoelectric signal. The sensing film (41) is made of a flexible material. The above device solves a problem in which existing pulse wave collection devices are unable to provide accurate pulse condition information.

Description

Pulse wave collecting device and pulse wave collecting and calibrating method

Technical field

The present invention relates to the field of pulse wave acquisition technology, and in particular to a pulse wave acquisition device and a pulse wave acquisition calibration method.

Background technique

TCM diagnosis has experienced more than 2,000 years of clinical practice and is one of the essence of the traditional Chinese medicine four diagnosis. According to the theory of traditional Chinese medicine, the blood and blood of the human body will be affected, and the blood circulation will be affected, and the pulse will change. The traditional diagnostic fingering method is based on the method of “three fingers and the same” for the diagnosis of the pulse. The main reason is to understand the characteristics of the pulse and the changes of the pulse with the change of pressure when the three parts of the inch, the off and the ruler are simultaneously pointed down. Observe the similarity or difference of the pulse maps of the three parts of "inch, off, and ruler" under the same pressure conditions; if necessary, adjust the finger pressure by the "finger and finger alternate" transformation method, respectively, in "floating, middle" , Shen" three kinds of compression force, respectively, to diagnose the pulse, further comparison and confirm the specificity of each part. The three-part and nine-month diagnostic method can collect more abundant pulse information, fully carry forward the theoretical characteristics of traditional pulmonology, and provide an important basis for clinical diagnosis, syndrome differentiation and treatment.

In recent years, different pulse instruments have been developed at home and abroad to replace patients with the diagnosis of patients, but most of the sensors of the pulse detectors are unable to accurately locate the "inch, off, ruler" taken by the Chinese medicine. It is impossible to simulate the three kinds of pressing forces of Chinese medicine, "floating, middle and sinking", and in the process of collecting the pulse wave at the pulse detection of the human body, the pulse wave is often collected due to the sliding of the patient's blood vessel or the involuntary shaking of the patient's arm. Invalidation, loss of important pulse wave information, so that it is impossible to obtain complete information on changes in human physiological functions, and it is difficult to confirm the diagnosis of the patient's disease.

Summary of the invention

The main object of the present invention is to provide a pulse wave collecting device and a pulse wave collecting and calibrating method for solving the problem that the pulse wave collecting device in the prior art cannot accurately reflect the pulse information of the human body.

In order to achieve the above object, according to an aspect of the present invention, a pulse wave collecting device for collecting a pulse wave when a human body is subjected to different external pressures, including a fixing band, and a fixing band for winding around the human body is provided. a pulse detecting portion; a pressure adjusting portion, a first end of the pressure adjusting portion is connected to the fixing belt; a pulse sensor, the pulse sensor includes a sensing film, and the second end of the pressure adjusting portion is connected with the sensing film to press the sensing film to the human body At the pulse detection, the sensing film is used to convert the pulse wave into a piezoelectric signal, wherein the sensing film is made of a flexible material.

Further, the sensing film is a polyvinylidene fluoride film.

Further, the sensing film comprises a connecting support segment and a pulse wave collecting segment connected to the connecting supporting segment, wherein the pulse wave collecting segment is plural, and the plurality of pulse wave collecting segments are spaced apart along the length direction of the connecting supporting segment.

Further, the pulse wave acquisition segments are five, and each pulse wave acquisition segment is perpendicular to the connection support segment.

Further, the pulse sensor further includes: a sensing circuit, the sensing circuit is coupled to the sensing film to transmit the piezoelectric signal; and the signal processing unit is electrically connected to the sensing film through the sensing circuit and used to receive and process the piezoelectric Signal; signal display unit, the signal display unit is electrically connected to the signal processing unit and used to display the value of the piezoelectric signal.

Further, the pressure adjusting portion includes a pressure regulating air bag, the pressure adjusting air bag is disposed on the fixing belt, and the pressure regulating air bag has a cubic structure.

Further, the pressure regulating portion further includes a pressure sensor, an air pump, and a three-way structure, wherein the first port of the three-way structure is in communication with the chamber of the pressure regulating air bag, and the second port of the three-way structure is in communication with the air pump, and the three-way structure The third port is in communication with the pressure sensor.

According to another aspect of the present invention, a pulse wave acquisition calibration method is provided, comprising: step S1: adjusting an external static pressure value of a human body pulse detection to a P by a pressure adjustment portion; and step S2: obtaining a human body pulse detection by a pulse sensor a pulse wave X corresponding to the external static pressure value P generated by the pulse wave acting on the sensing film of the pulse sensor; step S3: respectively, the plurality of amplitudes X and the plurality of amplitudes X respectively The electrical signal value U is used as the ordinate and the abscissa, and a plurality of amplitude pressure points B are calibrated in the two-dimensional coordinate system; step S4: the amplitude pressure curve of the pulse wave is drawn through the plurality of amplitude pressure points B.

Further, the external static pressure value P satisfies the formula: P = n × ΔP, where ΔP is the amount of pressure increase each time, and n is the number of times the pressure is increased.

Further, ΔP is greater than or equal to 5 mmHg and less than or equal to 30 mmHg.

Further, step S2 includes: step S21: measuring, by the pulse sensor, a piezoelectric signal value U corresponding to the external static pressure value P generated by the pulse wave at the pulse detection of the human body acting on the sensing film of the pulse sensor; step S22 : The amplitude X of the pulse wave is calculated by the piezoelectric signal value U.

Further, the piezoelectric signal value U and the amplitude X satisfy the formula:

Where g _3n is the piezoelectric coefficient of the sensing film and t is the thickness of the sensing film.

Further, before step S1, step S0 is further included: installing the pulse wave collecting device to the body pulse detecting portion.

According to the technical solution of the present invention, since the pulse wave collecting device includes a fixing belt for winding around the pulse detecting portion of the human body, the medical staff can wrap the fixing band around the pulse of the human body, thereby improving the pulse wave collecting device and the human body. Stability between connections.

Since the pulse wave collecting device comprises a pressure adjusting portion and a pulse sensor, the first end of the pressure adjusting portion is connected to the fixing belt, the pulse sensor comprises a sensing film, and the second end of the pressure adjusting portion is connected with the sensing film to press the sensing film In the tight body pulse detection, the sensing film is used to convert the pulse wave into a piezoelectric signal, wherein the sensing film is made of a flexible material. In this way, the pressure adjusting portion can be pressed between the fixing belt and the body pulse detecting portion to provide an effective pressing force for the sensing film, so that the sensing film and the human body pulse detecting portion are effectively adhered to each other, thereby making the sensing film The pulse wave at the pulse detection area of the human body can be comprehensively collected. Moreover, since the sensing film is made of a flexible material, the sensing film can reciprocately move with the pulse of the human body, so the sensing film can accurately measure the human body. The pulse wave generated at the pulse detection is converted into a piezoelectric wave The signal can be obtained by analyzing the external pressure and the piezoelectric signal applied to the pulse detecting portion of the human body by the pressure adjusting portion, thereby obtaining the amplitude pressure curve, thereby accurately reflecting the pulse information of the human body.

DRAWINGS

The accompanying drawings, which are incorporated in the claims of the claims In the drawing:

1 is a schematic exploded view showing a pulse wave collecting device at a pulse detecting area of a human body according to an alternative embodiment of the present invention;

2 is a schematic exploded perspective view showing another perspective of the pulse wave acquiring device of FIG. 1;

3 is a schematic structural view of a sensing film of the pulse wave acquiring device of FIG. 1;

4 is a schematic structural view of a fixing belt with a pressure regulating airbag of the pulse wave collecting device of FIG. 1;

Figure 5 is a graph showing the amplitude pressure curve of a pulse wave at a human body pulse detection obtained by a pulse wave acquisition calibration method according to an alternative embodiment of the present invention.

Wherein, the above figures include the following reference numerals:

1, human body pulse detection; 10, fixed band; 20, pressure adjustment part; 21, airbag adjustment; 30, pressure transmission part; 40, pulse sensor; 41, sensing film; 411, connecting support section; 412, pulse wave Acquisition section; 413, inch acquisition section; 414, inch collection section; 415, off acquisition section; 416, ruler acquisition section; 417, ruler acquisition section.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. The following description of the at least one exemplary embodiment is merely illustrative and is in no way All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It is to be noted that the terminology used herein is for the purpose of describing particular embodiments, and is not intended to limit the exemplary embodiments. As used herein, the singular " " " " " " There are features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in the embodiments are not intended to limit the scope of the invention. In the meantime, it should be understood that the dimensions of the various parts shown in the drawings are not drawn in the actual scale relationship for the convenience of the description. Techniques, methods and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and apparatus should be considered as part of the authorization specification. In all of the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as limit. Accordingly, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters indicate similar items in the following figures, and therefore, once an item is defined in one figure, it is not required to be further discussed in the subsequent figures.

In the description of the present invention, it is to be understood that orientations such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" and the like are indicated. Or the positional relationship is generally based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the invention and the simplification of the description, which are not intended to indicate or imply the indicated device or component. It must be constructed and operated in a specific orientation or in a specific orientation, and thus is not to be construed as limiting the scope of the invention; the orientations "inside and outside" refer to the inside and outside of the contour of the components themselves.

For convenience of description, spatially relative terms such as "above", "above", "on top", "above", etc., may be used herein to describe as in the drawings. The spatial positional relationship of one device or feature to other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device described. For example, if the device in the figures is inverted, the device described as "above other devices or configurations" or "above other devices or configurations" will be positioned "below other devices or configurations" or "at Under other devices or configurations." Thus, the exemplary term "above" can include both "over" and "under". The device can also be positioned in other different ways (rotated 90 degrees or at other orientations) and the corresponding description of the space used herein is interpreted accordingly.

In addition, it should be noted that the use of the words "first", "second", etc. to limit the components is only to facilitate the distinction between the corresponding components, if not stated otherwise, the above words have no special meaning, so can not understand To limit the scope of protection of the present invention.

In order to solve the problem that the pulse wave collecting device in the prior art cannot accurately reflect the pulse information of the human body, the present invention provides a pulse wave collecting device and a pulse wave collecting and calibrating method, wherein the pulse wave collecting device is used by the above-mentioned pulse wave collecting device. The pulse wave acquisition calibration method described above can obtain the amplitude pressure curve of the pulse wave at the pulse detection of the human body. The pulse wave acquisition calibration method described above is not limited to using only the pulse wave acquisition device described above, and the pulse wave acquisition device is the pulse wave described below. Wave acquisition device.

As shown in FIG. 1 to FIG. 4, the pulse wave collecting device is configured to collect a pulse wave when the human body pulse detecting unit 1 receives different external pressures. The pulse wave collecting device includes a fixing belt 10, a pressure adjusting portion 20, and a pulse sensor 40, and is fixed. The belt 10 is for winding around the human body pulse detecting portion 1, the first end of the pressure adjusting portion 20 is connected to the fixing belt 10, the pulse sensor 40 includes a sensing film 41, and the second end of the pressure adjusting portion 20 is connected to the sensing film 41. The sensing film 41 is pressed against the human body pulse detecting portion 1 for converting the pulse wave into a piezoelectric signal, wherein the sensing film 41 is made of a flexible material.

Since the pulse wave collecting device includes the fixing belt 10 for winding around the human body pulse detecting portion 1, the medical staff can wrap the fixing belt 10 around the pulse of the human body, thereby improving the connection between the pulse wave collecting device and the human body. Sex.

Since the pulse wave collecting device includes the pressure adjusting portion 20 and the pulse sensor 40, the first end of the pressure adjusting portion 20 is connected to the fixing belt 10, the pulse sensor 40 includes the sensing film 41, and the second end of the pressure adjusting portion 20 and the sensing film 41 is connected to press the sensing film 41 against the human body pulse detecting portion 1 for converting the pulse wave into a piezoelectric signal, wherein the sensing film 41 is made of a flexible material. Thus, the pressure adjusting portion 20 is pressed at the fixing belt 10 and the body pulse detecting portion. 1 can thus provide an effective pressing force for the sensing film 41, so that the sensing film 41 and the human body pulse detecting portion 1 are effectively adhered to each other, thereby enabling the sensing film 41 to comprehensively collect the pulse of the human body pulse detecting portion 1. In addition, since the sensing film 41 is made of a flexible material, the sensing film 41 can reciprocately move with the pulse of the human body, so that the sensing film 41 can accurately generate the pulse wave generated by the pulse detecting portion 1 of the human body. By converting into a piezoelectric signal, by analyzing and analyzing the external pressure applied to the pulse detecting portion 1 of the human body and the piezoelectric signal, an amplitude pressure curve can be obtained, thereby accurately reflecting the pulse information of the human body.

As shown in FIG. 2, the pulse wave collecting device further includes a pressure transmitting portion 30, and the second end of the pressure adjusting portion 20 is connected to the sensing film 41 through the pressure transmitting portion 30.

Since the pulse wave collecting device includes the pressure transmitting portion 30, the second end of the pressure adjusting portion 20 is connected to the sensing film 41 through the pressure transmitting portion 30. Thus, the pressure transmitting portion 30 is disposed between the pressure adjusting portion 20 and the sensing film 41, ensuring that the pressing force generated by the pressure adjusting portion 20 is uniformly transmitted to the surface of the sensing film 41, thereby causing the sensing film 41. The human body pulse detecting unit 1 is sufficiently closely attached to the pulse wave collecting device to reliably collect the pulse wave of the human body pulse detecting unit 1.

Alternatively, the sensing film 41 is a polyvinylidene fluoride film. That is, PVDF film. When the sensing film 41 made of polyvinylidene fluoride material is attached to the pulse detecting portion 1 of the human body, the contact area of the pulse wave collecting device and the pulse detecting portion 1 of the human body is effectively increased, thereby ensuring the acquisition of the pulse wave. During the process, the blood vessel is not moved due to the movement of the human blood vessel or the shaking of the hand, and the pulse wave data is collected more stably and objectively.

As shown in FIG. 1 to FIG. 3, the sensing film 41 includes a connection supporting section 411 and a pulse wave collecting section 412 connected to the connecting supporting section 411, wherein the pulse wave collecting section 412 is a plurality of pulse wave collecting sections. The 412 are spaced apart along the length direction of the connection support section 411. In this way, the plurality of pulse wave acquisition segments 412 are used as sensors to collect pulse waves at different points of the human body pulse detection site 1 and ensure that the plurality of pulse wave acquisition segments 412 do not interfere with each other, thereby improving the pulse wave acquisition device. Reliable stability to pulse wave acquisition.

As shown in FIG. 3, the pulse wave acquisition segments 412 are five, and each of the pulse wave acquisition segments 412 is perpendicular to the connection support segment 411.

Optionally, as shown in FIG. 1 , the human body pulse detection area 1 is a human wrist.

The five pulse wave acquisition segments 412 are respectively an inch acquisition segment 413, an inch collection segment 414, a closed acquisition segment 415, a ruler acquisition segment 416, and a sub-segment acquisition segment 417, respectively, for collecting the inch, inch, and off of the human wrist. Pulse wave information at five feet, feet and feet.

It should be noted that, when the pulse wave collecting device is used, the connecting support segment 411 is disposed along the direction of the human wrist, and each pulse wave collecting segment 412 is vertically disposed with the direction of the human wrist, thereby ensuring that each pulse wave collecting segment 412 can Fully simulate the human finger.

Alternatively, the pressure transmitting portion 30 is made of a flexible material, and the pressure transmitting portion 30 is provided with a mesh structure. In this way, the pressure transmitting portion 30 can absorb the vibration potential energy transmitted outward from the pulse wave collecting portion 412, avoiding the vibration of the pulse wave collecting portion 412 and affecting the pulse wave collecting portion 412 adjacent thereto, thereby ensuring the collection of the sensing film 41. The validity of the pulse wave information. Moreover, the pressure transmitting portion 30 provided with a mesh structure and made of a flexible material can reliably accommodate the movement of the sensing film 41. The deformation occurs so that the deformation amount of the sensing film 41 can be reliably reflected, and the piezoelectric signal generated at the sensing film 41 can be made clearer.

Alternatively, the pressure transmitting portion 30 is one of rubber, silica gel or sponge.

In an alternative embodiment of the present invention, the pulse sensor 40 further includes a sensing circuit, a signal processing unit, and a signal display unit. The sensing circuit is coupled to the sensing film 41 to transmit the piezoelectric signal, and the signal processing unit The sensor circuit is electrically coupled to the sensing film 41 and used to receive and process the piezoelectric signal. The signal display unit is electrically coupled to the signal processing unit and is used to display the value of the piezoelectric signal.

As shown in FIGS. 1, 2, and 4, the pressure adjusting portion 20 includes a pressure regulating air bag 21, the pressure adjusting air bag 21 is disposed on the fixing belt 10, and the pressure regulating air bag 21 has a cubic structure. Thus, when inflating the inside of the pressure regulating airbag 21, the surface of the pressure regulating airbag 21 facing the sensing film 41 is integrally moved, thereby ensuring that the surface of the pressure regulating airbag 21 facing the sensing film 41 will pass through. The sensing film 41 is pressed to make the force at each point of the sensing film 41 uniform.

Alternatively, the pressure regulating balloon 21 is made of silicone.

The fixing tape 10 is wound around the human body pulse detecting portion 1 and connected by a connecting means provided at both ends in the longitudinal direction of the fixing tape 10.

Optionally, the connecting device is a nylon buckle disposed at both ends of the fixing belt 10 in the longitudinal direction.

In another alternative embodiment of the present invention, the pressure regulating portion 20 further includes a pressure sensor, an air pump, and a three-way structure, wherein the first port of the three-way structure communicates with the bladder of the pressure regulating air bag 21, The second port of the three-way structure is in communication with the air pump, and the third port of the three-way structure is in communication with the pressure sensor. Thus, the pressure regulating bladder 21 is inflated by the air pump, and the pressure sensor can perform the detection of the air pressure in the pressure regulating bladder 21, thus obtaining the external static pressure value P of the human body pulse detecting portion 1.

The pulse wave acquisition calibration method includes a step S1, a step S2, a step S3, and a step S4, wherein the step S1 is: adjusting the external static pressure value of the human body pulse detection point 1 to the P by the pressure adjustment unit 20; the step S2 is: passing the pulse The sensor 40 obtains the amplitude X corresponding to the external static pressure value P generated by the pulse wave of the human body pulse detecting portion 1 acting on the sensing film 41 of the pulse sensor 40; step S3 is a plurality of amplitudes X and a plurality of electrical signal values U corresponding to the plurality of amplitudes X as the ordinate and the abscissa, and a plurality of amplitude pressure points B are calibrated in the two-dimensional coordinate system; step S4 is: drawing through the plurality of amplitude pressure points B The amplitude and pressure curve of the pulse wave.

Fig. 5 is a graph showing the amplitude pressure curve of a pulse wave at a human body pulse detection according to an alternative embodiment obtained by the pulse wave acquisition calibration method described above. In the coordinate system shown in the drawing, the abscissa axis is the external static pressure value P of the human body pulse detecting point 1, and the ordinate is the amplitude X corresponding to the external static pressure value P. In traditional Chinese medicine, the pulse of the human body through the trend of the amplitude pressure curve, such as floating veins, sinking veins or veins, can provide an effective diagnostic basis for doctors to diagnose patients' diseases.

As shown in FIG. 5, the curve A1, the curve A2, the curve A3, the curve A4, and the curve A5 in the figure respectively correspond to the upper acquisition section 413, the inch collection section 414, the off acquisition section 415, the ruler acquisition section 416, and the under-scale acquisition section. 417 measures and converts the amplitude pressure curve, which is the pulse information of the five inches, inches, feet, feet and feet under the human wrist.

It should be noted that the P value satisfies the formula: P=n×ΔP, where ΔP is the amount of pressure increase each time, and n is the number of times the pressure is increased. Thus, the external static pressure value of the human body pulse detecting point 1 is adjusted to P by the pressure adjusting portion 20, the external static pressure value P is increased from zero, and the horizontal coordinate point is calibrated with ΔP as the increasing amount.

Alternatively, ΔP is greater than or equal to 5 mmHg and less than or equal to 30 mmHg.

Step S2 of the pulse wave acquisition calibration method includes: step S21 and step S22, wherein step S21 is: measuring, by the pulse sensor 40, a pulse wave generated by the pulse detection portion 1 of the human body on the sensing film 41 of the pulse sensor 40. The external static pressure value P corresponds to the piezoelectric signal value U; in step S22, the amplitude X of the pulse wave is calculated by the piezoelectric signal value U.

Thus, the amplitude X of the pulse wave can be reliably calculated by the piezoelectric signal value U generated and measured on the sensing film 41, thereby calibrating the ordinate point corresponding to the abscissa point, and passing the abscissa point And the ordinate point can draw a plurality of amplitude pressure points B in FIG. 5, and by connecting a plurality of amplitude pressure points B, the amplitude pressure curve of the pulse wave can be accurately obtained.

Alternatively, the piezoelectric signal value U and the amplitude X satisfy the formula:

_Here , g _3n is the piezoelectric coefficient of the sensing film 41, and t is the thickness of the sensing film 41.

It should be noted that, before step S1, step S0 is further included: the pulse wave collecting device is installed to the human body pulse detecting station 1.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

1. Since the sensing film is larger than the ordinary strain gauge pulse sensor, the area covering the pulse of the human body can be greatly increased, and the measurement of the pulse wave does not deviate from the measurement due to the movement of the human blood vessel or the shaking of the human hand. Position, more stable and objective collection of pulse wave data;

2. Due to the setting of the pressure transmission part, the vibration crosstalk between the pulse wave collection sections is extremely low, so that the collected pulse wave data is more objective and true;

3. Due to the pressure applied by the pressure regulating part, the pressure of the floating and sinking of the vessel at the wrist of the human body is evenly stressed, which ensures the true reliability of the pulse wave at different positions collected;

4. By using the pulse wave collecting device or the pulse wave collecting and calibrating method of the present invention, the pulse information of the human body pulse detecting position can be objectively reflected, and the pressure range can be conveniently controlled by the adjusting portion to pressurize, and the positioning is floated, taken, Sink

5. The pulse wave collecting device of the present invention has a compact structure and is convenient to carry.

It is to be noted that the terminology used herein is for the purpose of describing particular embodiments, and is not intended to limit the exemplary embodiments. As used herein, the singular forms are also intended unless the context clearly dictates otherwise In addition, the terms "comprising" and / or "comprising" are used in the specification to indicate the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or order. It is to be understood that the data so used may be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A pulse wave collecting device is used for collecting a pulse wave of a human body pulse detecting portion (1) when subjected to different external pressures, and is characterized in that it comprises:

a fixing strap (10) for winding around the human body pulse detecting portion (1);

a pressure adjusting portion (20), the first end of the pressure adjusting portion (20) is connected to the fixing belt (10);

a pulse sensor (40), the pulse sensor (40) includes a sensing film (41), and a second end of the pressure adjusting portion (20) is coupled to the sensing film (41) to connect the sensing film (41) pressing the human body pulse detecting portion (1), the sensing film (41) for converting the pulse wave into a piezoelectric signal, wherein the sensing film (41) is made of a flexible material to make.
The pulse wave collection device according to claim 1, wherein the sensing film (41) is a polyvinylidene fluoride film.
The pulse wave collection device according to claim 1, wherein said sensing film (41) includes a connection support section (411) and a pulse wave acquisition section (412) connected to said connection support section (411). The pulse wave acquisition section (412) is plural, and the plurality of pulse wave acquisition sections (412) are spaced apart along the length direction of the connection support section (411).
The pulse wave collecting device according to claim 3, wherein said pulse wave collecting sections (412) are five, and each of said pulse wave collecting sections (412) is associated with said connecting supporting section (411) vertical.
The pulse wave collection device according to claim 1, wherein the pulse sensor (40) further comprises:

a sensing circuit, the sensing circuit is coupled to the sensing film (41) to transmit the piezoelectric signal;

a signal processing unit, the signal processing unit is electrically connected to the sensing film (41) through the sensing circuit and configured to receive and process the piezoelectric signal;

a signal display unit electrically coupled to the signal processing unit and configured to display a value of the piezoelectric signal.
The pulse wave collecting device according to claim 1, wherein said pressure adjusting portion (20) comprises a pressure regulating airbag (21), and said pressure regulating airbag (21) is disposed on said fixing belt (10) And the pressure regulating airbag (21) has a cubic structure.
The pulse wave collecting device according to claim 6, wherein the pressure adjusting portion (20) further comprises a pressure sensor, an air pump, and a three-way structure, wherein the first port of the three-way structure and the pressure The bladder communication of the air bag (21) is adjusted, the second port of the three-way structure is in communication with the air pump, and the third port of the three-way structure is in communication with the pressure sensor.
A pulse wave acquisition calibration method, comprising:

Step S1: adjusting the external static pressure value of the human body pulse detection portion (1) to P by the pressure adjusting portion (20);

Step S2: obtaining, by the pulse sensor (40), the external static pressure value P generated by the pulse wave of the human body pulse detecting portion (1) acting on the sensing film (41) of the pulse sensor (40) Corresponding amplitude X;

Step S3: calibrating a plurality of amplitude pressures in a two-dimensional coordinate system by using the plurality of amplitudes X and a plurality of electrical signal values U corresponding to the plurality of the amplitudes X as ordinate and abscissa respectively Point B;

Step S4: plot the amplitude pressure curve of the pulse wave through a plurality of the amplitude pressure points B.
The pulse wave acquisition calibration method according to claim 8, wherein the external static pressure value P satisfies the formula: P = n × ΔP, wherein ΔP is the amount of pressure increase each time, and n is the number of times of pressure increase .
The pulse wave acquisition calibration method according to claim 9, wherein the ΔP is greater than or equal to 5 mmHg and less than or equal to 30 mmHg.
The pulse wave acquisition calibration method according to claim 8, wherein the step S2 comprises:

Step S21: measuring, by the pulse sensor (40), the external static pressure generated by the pulse wave of the human body pulse detecting portion (1) acting on the sensing film (41) of the pulse sensor (40) a piezoelectric signal value U corresponding to the value P;

Step S22: calculating the amplitude X of the pulse wave by the piezoelectric signal value U.
The pulse wave acquisition calibration method according to claim 11, wherein said piezoelectric signal value U and said amplitude X satisfy a formula:
Where g 3n is the piezoelectric coefficient of the sensing film (41), and t is the thickness of the sensing film (41).
The pulse wave acquisition calibration method according to claim 8, characterized in that before the step S1, the method further comprises the step S0 of installing the pulse wave acquisition device to the human body pulse detection portion (1).