CN109222917B - Pulse wave sensor, sensor array and pulse wave measurement method - Google Patents

Abstract

A pulse wave sensor, a sensor array and a pulse wave measuring method are provided. The pulse wave sensor comprises a flexible piezoelectric sensor and a static pressure sensor, wherein the flexible piezoelectric sensor is used for sensing pulse waves; the static pressure sensor is used for measuring the static pressure applied on the pulse wave sensor. The sensor of the invention separately measures static pressure signals and dynamic pulse wave pressure signals, utilizes the piezoelectric film to measure dynamic pressure fluctuation, and the piezoresistive sensor measures static pressure, so that the dynamic sensitivity is not influenced by the static pressure range, and the sensor can keep high sensitivity to pulse waves under the wide-range static pressure; the sensor adopts the flexible framework, so that the formed array can meet the wrist characteristics of different people and realize good fit on the surface of the arm.

Description

Translated fromChinese

脉搏波传感器、传感器阵列及脉搏波测量方法Pulse wave sensor, sensor array and pulse wave measurement method

技术领域technical field

本发明属于人体健康状态无创检测技术领域，具体地涉及一种用于采集桡动脉脉搏波的装置，更具体地涉及一种脉搏波传感器、传感器阵列及脉搏波测量方法。The invention belongs to the technical field of non-invasive detection of human health status, in particular to a device for collecting radial artery pulse waves, and more particularly to a pulse wave sensor, a sensor array and a pulse wave measurement method.

背景技术Background technique

脉搏波形可以反映人体健康程度以及多种疾病。脉搏波测量方法分为侵入和非侵入。侵入式脉搏波测量方法对病人造成极大伤害，非侵入式对病人伤害小，比如压力传感器、超声传感器、光电传感器等。这些传感器都可实现非侵入式测量脉搏波。但是目前主流的测量脉搏波的方法依旧是压力传感器测脉搏波。有些设备利用薄膜压阻式压力传感器对腕部多点进行脉搏采集，有些设备采用了应变计作为脉搏波传感器，还有一些设备采用MEMS压阻传感器检测脉搏。上述传感器动态范围由于受材料本身限制，灵敏度受到量程制约，相同供电和灵敏度下，测力量程越大，对力的分辨率越低，输出电压越低。后续的放大电路也只是单纯放大，放大倍数过高在大压力下电压输出容易饱和。另外从静态压力中提取动态脉搏波增加了后续处理电路和算法复杂度。The pulse waveform can reflect the health of the human body and various diseases. Pulse wave measurement methods are divided into invasive and non-invasive. The invasive pulse wave measurement method causes great harm to the patient, and the non-invasive method causes little harm to the patient, such as pressure sensor, ultrasonic sensor, photoelectric sensor, etc. These sensors all enable non-invasive measurement of pulse waves. However, the current mainstream method for measuring pulse wave is still the pressure sensor to measure pulse wave. Some devices use thin-film piezoresistive pressure sensors to collect pulses at multiple points on the wrist, some devices use strain gauges as pulse wave sensors, and some devices use MEMS piezoresistive sensors to detect pulses. The dynamic range of the above sensor is limited by the material itself, and the sensitivity is limited by the range. Under the same power supply and sensitivity, the larger the measurement range, the lower the force resolution and the lower the output voltage. The subsequent amplifying circuit is simply amplifying, and the voltage output is easy to saturate under high pressure if the magnification is too high. In addition, the extraction of dynamic pulse wave from static pressure increases the complexity of subsequent processing circuits and algorithms.

单纯的压电原理的压力传感器尽管具有很高的灵敏度且输出幅值不会受静态压力影响，但是压电传感器不能测量静态压力。因此这两种传感器独立的用于脉搏波测量都不能有效反映被测人的身体状况。如果想通过脉搏波反映疾病类型，必须在宽范围静态压力采集脉搏波。但是当前的压阻式传感器的灵敏度由施加力的量程决定。这就导致了小量程压力传感器量程不能满足测试要求，大量程传感器输出电压对力的分辨能力较低，在低压力下不能输出有形态意义的脉搏波。Although the pressure sensor based on the pure piezoelectric principle has high sensitivity and the output amplitude is not affected by static pressure, the piezoelectric sensor cannot measure static pressure. Therefore, these two sensors cannot effectively reflect the physical condition of the measured person when they are independently used for pulse wave measurement. If you want to reflect the disease type through the pulse wave, the pulse wave must be collected in a wide range of static pressure. But the sensitivity of current piezoresistive sensors is determined by the range of applied force. This leads to the fact that the range of the small-range pressure sensor cannot meet the test requirements, and the output voltage of the large-range sensor has a low ability to resolve force, and cannot output a morphologically meaningful pulse wave under low pressure.

另外，现有的传感器阵列存在两个问题，一个问题是传感器阵列不能满足不同人群手臂外形贴合问题，阵列贴合度差无法保障采集脉搏波的保真度；另一个问题是传感器形变带来的传感器间相互干扰问题，该问题可使相邻传感器采集的脉搏波相互叠加，影响脉搏波准确性。In addition, the existing sensor array has two problems. One problem is that the sensor array cannot meet the shape of the arms of different groups of people, and the poor fit of the array cannot guarantee the fidelity of the collected pulse wave; the other problem is that the sensor deformation brings The problem of mutual interference between the sensors can cause the pulse waves collected by adjacent sensors to overlap each other, which affects the accuracy of the pulse waves.

因此有必要研究一种既能测量大静态压力，同时又保持高灵敏度、动态测量范围广泛的脉搏波传感器，并组成能够减轻传感器间干扰，与手臂贴合的传感器。Therefore, it is necessary to develop a pulse wave sensor that can measure large static pressure while maintaining high sensitivity and a wide dynamic measurement range, and to form a sensor that can reduce the interference between sensors and fit the arm.

发明内容SUMMARY OF THE INVENTION

有鉴于此，本发明的主要目的在于提供一种脉搏波传感器、传感器阵列及采用其的脉搏波测量装置，以解决上述技术问题中的至少之一。In view of this, the main purpose of the present invention is to provide a pulse wave sensor, a sensor array and a pulse wave measuring device using the same, so as to solve at least one of the above technical problems.

为了实现上述目的，作为本发明的一个方面，本发明提供了一种脉搏波传感器，包括静态压力传感器和柔性压电传感器，其特征在于：In order to achieve the above object, as an aspect of the present invention, the present invention provides a pulse wave sensor, including a static pressure sensor and a flexible piezoelectric sensor, characterized in that:

所述柔性压电传感器用于感测脉搏波并产生电信号；The flexible piezoelectric sensor is used for sensing pulse waves and generating electrical signals;

所述静态压力传感器用于感测施加在该脉搏波传感器上的静态压力。The static pressure sensor is used for sensing the static pressure exerted on the pulse wave sensor.

作为本发明的另一个方面，本发明还提供了一种脉搏波传感器阵列，包括弹性缓冲材料和若干如上所述的脉搏波传感器，其中若干所述脉搏波传感器以一定间隔分布在所述弹性缓冲材料上。As another aspect of the present invention, the present invention also provides a pulse wave sensor array, comprising an elastic buffer material and a plurality of the above-mentioned pulse wave sensors, wherein a plurality of the pulse wave sensors are distributed in the elastic buffer at certain intervals on the material.

作为本发明的再一个方面，本发明还提供了一种脉搏波测量方法，其特征在于，包括以下步骤：As a further aspect of the present invention, the present invention also provides a pulse wave measurement method, characterized in that it includes the following steps:

通过柔性压电传感器感测脉搏波并产生电信号；Sensing pulse waves and generating electrical signals through flexible piezoelectric sensors;

通过静态压力传感器在大压力范围下感测施加在该脉搏波传感器上的静态压力。The static pressure exerted on the pulse wave sensor is sensed over a large pressure range by a static pressure sensor.

基于上述技术方案可知，本发明的脉搏波传感器具有如下有益效果：该传感器克服了现有技术中脉搏波采集装置无法精准、全面地反映出人体的脉象信息的问题，传统压阻式传感器量程与灵敏度成反比，脉搏波传感器需要在大量程范围捕捉微弱脉搏信号，而传统压阻传感器在大量程范围中灵敏度较低，而本发明的传感器将静态压力信号与动态脉搏波压力信号分开测量，利用压电薄膜测量动态压力波动，压阻式传感器测量静态压力，从而动态灵敏度不受静态压力量程影响，能够在宽范围静态压力下，对脉搏波保持高灵敏度；本发明的传感器采用长条形曲面形状的骨架及弹性缓冲材料作为支撑，从而组成的阵列可以满足不同人群手腕特征，实现对手臂表面良好的贴合。Based on the above technical solutions, it can be seen that the pulse wave sensor of the present invention has the following beneficial effects: the sensor overcomes the problem that the pulse wave acquisition device in the prior art cannot accurately and comprehensively reflect the pulse condition information of the human body, and the range of the traditional piezoresistive sensor is different from that of the conventional piezoresistive sensor. The sensitivity is inversely proportional, the pulse wave sensor needs to capture the weak pulse signal in the large range range, while the traditional piezoresistive sensor has low sensitivity in the large range range, and the sensor of the present invention measures the static pressure signal and the dynamic pulse wave pressure signal separately, using The piezoelectric film measures dynamic pressure fluctuations, and the piezoresistive sensor measures static pressure, so that the dynamic sensitivity is not affected by the static pressure range, and can maintain high sensitivity to pulse waves under a wide range of static pressures; the sensor of the present invention adopts a long curved surface The shaped skeleton and elastic buffer material are used as supports, so that the formed array can meet the wrist characteristics of different people and achieve a good fit on the arm surface.

附图说明Description of drawings

图1是本发明的脉搏波传感器的结构原理图；Fig. 1 is the structural principle diagram of the pulse wave sensor of the present invention;

图2是本发明的脉搏波传感器阵列结构的侧视示意图；2 is a schematic side view of the pulse wave sensor array structure of the present invention;

图3A-3C分别是本发明的传感器骨架上向下凹的空间与柔性压电传感器的柔性薄膜之间的位置关系示意图；3A-3C are schematic diagrams of the positional relationship between the concave space on the sensor skeleton of the present invention and the flexible film of the flexible piezoelectric sensor, respectively;

图4是本发明的脉搏波测量装置与桡动脉的位置关系示意图；4 is a schematic diagram of the positional relationship between the pulse wave measuring device of the present invention and the radial artery;

图5是本发明的脉搏波传感器阵列结构与桡动脉的位置关系的正视图。5 is a front view of the positional relationship between the pulse wave sensor array structure of the present invention and the radial artery.

在上图中，附图标记含义如下：In the above figure, the reference numerals have the following meanings:

1、传感器骨架1. Sensor skeleton

2、柔性压电传感器 3、柔性压电传感器的触点2. Flexiblepiezoelectric sensor 3. Contacts of flexible piezoelectric sensor

4、静态压力传感器 5、静态压力传感器的触点4.Static pressure sensor 5. Contact of static pressure sensor

6、传感器单元6. Sensor unit

6-1、第一传感器单元6-1. The first sensor unit

6-2、第二传感器单元6-2. Second sensor unit

6-3、第三传感器单元6-3. The third sensor unit

6-4、第四传感器单元6-4. Fourth sensor unit

6-5、第五传感器单元6-5. Fifth sensor unit

7、弹性缓冲材料7. Elastic buffer material

8、向下凹的空间8. Concave space

9、加压装置9. Pressurizing device

10、桡动脉 11、桡骨10.Radial artery 11. Radius

12、皮肤12. Skin

具体实施方式Detailed ways

为使本发明的目的、技术方案和优点更加清楚明白，以下结合具体实施例，并参照附图，对本发明作进一步的详细说明。In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

本发明是为了解决现有技术中的脉搏波采集装置无法精准、全面地反映出人体的脉象信息的问题。传统压阻式传感器量程与灵敏度成反比，脉搏波传感器需要在大量程范围捕捉微弱脉搏信号，而传统压阻传感器在大量程范围中灵敏度较低。为了解决此问题，本发明中将静态压力信号与动态脉搏波压力信号分开测量，利用压电薄膜测量动态压力波动，压阻式传感器测量静态压力，从而提高了压电薄膜传感器的灵敏度，使得脉搏波信号更加清晰，并且在大压力范围下准确测量静态压力。The invention aims to solve the problem that the pulse wave collecting device in the prior art cannot accurately and comprehensively reflect the pulse condition information of the human body. The range of traditional piezoresistive sensors is inversely proportional to the sensitivity. The pulse wave sensor needs to capture weak pulse signals in the large range range, while the traditional piezoresistive sensor has low sensitivity in the large range range. In order to solve this problem, in the present invention, the static pressure signal and the dynamic pulse wave pressure signal are measured separately, the piezoelectric film is used to measure the dynamic pressure fluctuation, and the piezoresistive sensor measures the static pressure, thereby improving the sensitivity of the piezoelectric film sensor and making the pulse wave The wave signal is clearer, and static pressure is accurately measured over a large pressure range.

此外，本发明针对现有传感器阵列中传感器状态相互影响问题和手臂贴服问题，提供了一种减轻传感器间相互干扰，又能适应不同人群手臂的结构。In addition, the present invention provides a structure that reduces the mutual interference between sensors and can adapt to the arms of different people, aiming at the problem of mutual influence of sensor states and the problem of arm fit in the existing sensor array.

具体地，作为本发明的一个方面，本发明公开了一种脉搏波传感器，包括柔性压电传感器和静态压力传感器，其中：Specifically, as an aspect of the present invention, the present invention discloses a pulse wave sensor, including a flexible piezoelectric sensor and a static pressure sensor, wherein:

柔性压电传感器用于感测脉搏波；Flexible piezoelectric sensors are used to sense pulse waves;

静态压力传感器用于测量施加在该脉搏波传感器上的静态压力。The static pressure sensor is used to measure the static pressure exerted on the pulse wave sensor.

其中，静态压力传感器可以为压阻式传感器，例如包括但不限于MEMS传感器、压阻膜传感器、应变计式传感器。The static pressure sensor may be a piezoresistive sensor, for example, including but not limited to MEMS sensor, piezoresistive film sensor, and strain gauge sensor.

其中，柔性压电传感器为压电式压力传感器，其压电材料例如包括但不限于PVDF(聚偏氟乙烯)、PZT(锆钛酸铅压电陶瓷)、BaTiO₃等。The flexible piezoelectric sensor is a piezoelectric pressure sensor, and its piezoelectric materials include, but are not limited to, PVDF (polyvinylidene fluoride), PZT (lead zirconate titanate piezoelectric ceramic), BaTiO₃ and the like.

其中，柔性压电传感器上还设置有触点，触点一侧与待测的皮肤相连，用于贴合手臂表面和传导待测的脉搏波，触点另一侧与柔性压电传感器的检测单元相连或相接触，将待测的脉搏波传导到柔性压电传感器的检测单元上。Among them, the flexible piezoelectric sensor is also provided with a contact point, one side of the contact point is connected to the skin to be measured, which is used to fit the arm surface and conduct the pulse wave to be measured, and the other side of the contact point is connected to the detection of the flexible piezoelectric sensor. The units are connected or contacted to transmit the pulse wave to be measured to the detection unit of the flexible piezoelectric sensor.

其中，静态压力传感器上也设置有触点，静态压力传感器的触点用于将承受的静态压力传导到静态压力传感器的检测单元上。Wherein, the static pressure sensor is also provided with contacts, and the contacts of the static pressure sensor are used to transmit the static pressure to the detection unit of the static pressure sensor.

其中，两种传感器的触点的材质包括但不限于硅胶、泡棉、海绵等材料，触点的邵氏硬度A例如在1-80度之间。The materials of the contacts of the two sensors include but are not limited to materials such as silica gel, foam, sponge, etc., and the Shore A hardness of the contacts is, for example, between 1-80 degrees.

作为本发明的另一个方面，本发明还公开了一种脉搏波传感器阵列，包括弹性缓冲材料和若干上述的脉搏波传感器，其中该若干脉搏波传感器以一定间隔分布在该弹性缓冲材料上。As another aspect of the present invention, the present invention also discloses a pulse wave sensor array, comprising an elastic buffer material and several above-mentioned pulse wave sensors, wherein the several pulse wave sensors are distributed on the elastic buffer material at certain intervals.

该弹性缓冲材料例如包括但不限于聚氨酯海绵、慢回弹记忆海绵等，可以使该脉搏波传感器阵列贴合不同人群的手臂。For example, the elastic buffer material includes, but is not limited to, polyurethane sponge, slow-rebound memory foam, etc., so that the pulse wave sensor array can fit the arms of different people.

该若干脉搏波传感器例如为5个，也可以是3、4、6、7、8、9、10个，沿被测的腕部等间距依次排开。作为优选，其中的第一传感器贴于腕横纹靠近手掌一侧，其余的传感器依次向手臂的肘部方向排列。The number of pulse wave sensors is, for example, 5, or 3, 4, 6, 7, 8, 9, and 10, which are arranged in sequence along the measured wrist at equal intervals. Preferably, the first sensor is attached to the lateral wrist crease near the palm, and the other sensors are arranged in turn toward the elbow of the arm.

当外界有加压装置对该脉搏波传感器阵列施加压力时，静态压力传感器感受来自传感器阵列上方的弹性缓冲材料传递的静态压力，柔性压电传感器用于测量桡动脉脉博，最终实现在不同压力下脉搏波传感器阵列对桡动脉脉搏信号的检测。When the external pressure device exerts pressure on the pulse wave sensor array, the static pressure sensor senses the static pressure transmitted from the elastic buffer material above the sensor array, and the flexible piezoelectric sensor is used to measure the radial artery pulse, and finally realizes different pressures. Detection of the radial artery pulse signal by the lower pulse wave sensor array.

作为本发明的再一个方面，本发明还公开了一种脉搏波测量方法，包括以下步骤：As another aspect of the present invention, the present invention also discloses a pulse wave measurement method, comprising the following steps:

通过柔性压电传感器感测脉搏波并产生电信号；Sensing pulse waves and generating electrical signals through flexible piezoelectric sensors;

通过静态压力传感器在大压力范围下感测施加在该脉搏波传感器上的静态压力。The static pressure exerted on the pulse wave sensor is sensed over a large pressure range by a static pressure sensor.

其中，静态压力传感器为MEMS传感器、压阻膜传感器或应变计式传感器；柔性压电传感器为压电式压力传感器，压电材料采用PVDF、PZT或BaTiO₃材料；作为优选，柔性压电传感器为柔性薄膜传感器。Among them, the static pressure sensor is a MEMS sensor, a piezoresistive film sensor or a strain gauge sensor; the flexible piezoelectric sensor is a piezoelectric pressure sensor, and the piezoelectric material is PVDF, PZT or BaTiO₃ material; preferably, the flexible piezoelectric sensor is Flexible thin film sensor.

在一些具体实施例中，本发明的脉搏波传感器，包括传感器骨架、柔性压电传感器、柔性压电传感器触点、静态压力传感器、静态压力传感器触点。其中传感器骨架凹侧与柔性压电传感器相连，用于支撑该柔性压电传感器；传感器骨架另一侧与静态压力传感器相连，用于支撑该静态压力传感器。柔性压电传感器另一侧与柔性触点相连，用于感受触点所传导的脉搏波。触点另一侧与皮肤相连，用于贴合手臂表面和传导脉搏波。静态压力传感器另一侧与加压装置相连，用于检测此传感器结构所受到的整体压力。其中静态压力传感器为压阻式传感器，包括但不限于MEMS传感器、压阻膜传感器、应变计式传感器。柔性压电传感器为压电式压力传感器，压电材料包括但不限于PVDF、PZT、BaTiO₃等材料。触点的材质包括但不限于硅胶、泡棉和海绵等材质。In some specific embodiments, the pulse wave sensor of the present invention includes a sensor skeleton, a flexible piezoelectric sensor, a flexible piezoelectric sensor contact, a static pressure sensor, and a static pressure sensor contact. The concave side of the sensor frame is connected with the flexible piezoelectric sensor for supporting the flexible piezoelectric sensor; the other side of the sensor frame is connected with the static pressure sensor for supporting the static pressure sensor. The other side of the flexible piezoelectric sensor is connected to the flexible contact for sensing the pulse wave conducted by the contact. The other side of the contact is attached to the skin to conform to the surface of the arm and conduct pulse waves. The other side of the static pressure sensor is connected to a pressurizing device for detecting the overall pressure on the sensor structure. The static pressure sensor is a piezoresistive sensor, including but not limited to a MEMS sensor, a piezoresistive film sensor, and a strain gauge sensor. The flexible piezoelectric sensor is a piezoelectric pressure sensor, and piezoelectric materials include but are not limited to PVDF, PZT, BaTiO₃ and other materials. The materials of the contacts include but are not limited to materials such as silicone, foam, and sponge.

在一些具体实施例中，本发明的脉搏波传感器阵列，包括一个多孔弹性缓冲材料和五个脉搏波传感器，多孔弹性缓冲材料与五个传感器连接，多孔弹性缓冲材料与静态压力传感器结构一侧相连，用于吸收缓冲，减少传感器间震动干扰和外界冲击干扰。另外，多孔弹性缓冲材料可以使传感器阵列贴合不同人群手臂。多孔弹性缓冲材料不局限于聚氨酯海绵、慢回弹记忆海绵等。In some specific embodiments, the pulse wave sensor array of the present invention includes a porous elastic buffer material and five pulse wave sensors, the porous elastic buffer material is connected to the five sensors, and the porous elastic buffer material is connected to one side of the static pressure sensor structure , used to absorb buffering and reduce vibration interference between sensors and external impact interference. In addition, the porous elastic buffer material can make the sensor array fit the arms of different people. The porous elastic buffer material is not limited to polyurethane sponge, slow rebound memory sponge, and the like.

每个传感器沿腕部等间距依次排开。第一传感器贴近腕横纹手掌一侧，第二至五传感器从腕横纹手臂一侧依次排开。该分布可以适用于不同人群手臂长度，增大桡动脉波动探测长度。Each sensor is lined up at equal intervals along the wrist. The first sensor is close to the palm side of the wrist stripe, and the second to fifth sensors are arranged in sequence from the arm side of the wrist stripe. This distribution can be applied to arm lengths of different people, increasing the detection length of radial artery fluctuations.

下面结合附图对本发明的几个具体实施方式进行进一步阐述说明。Several specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

如图1-5所示，本发明的脉搏波传感器包括传感器骨架1、柔性压电传感器2、柔性压电传感器的触点3、静态压力传感器4及静态压力传感器的触点5。柔性压电传感器的触点3与皮肤12接触，柔性压电传感器的触点3的材料特性使其能够贴合皮肤，柔性压电传感器的触点3拥有一定弹性形变可使手臂桡动脉10的脉搏波传递给柔性压电传感器2。柔性压电传感器以弯曲状态贴合在传感器骨架1上，它将柔性压电传感器的触点3传导的脉搏波波动转化为电信号，通过柔性压电传感器2的两极将转化的电信号输出。当桡动脉10跳动给皮肤12一个力，这个力被柔性压电传感器的触点3接收并传递给柔性压电传感器2，柔性压电传感器2即可输出电信号。As shown in Figures 1-5, the pulse wave sensor of the present invention includes asensor frame 1, a flexiblepiezoelectric sensor 2, acontact 3 of the flexible piezoelectric sensor, astatic pressure sensor 4, and acontact 5 of the static pressure sensor. Thecontact 3 of the flexible piezoelectric sensor is in contact with theskin 12, and the material properties of thecontact 3 of the flexible piezoelectric sensor enable it to fit the skin. The pulse wave is transmitted to the flexiblepiezoelectric sensor 2 . The flexible piezoelectric sensor is attached to thesensor frame 1 in a bent state, and it converts the pulse wave fluctuations conducted by thecontacts 3 of the flexible piezoelectric sensor into electrical signals, and outputs the converted electrical signals through the two poles of the flexiblepiezoelectric sensor 2 . When theradial artery 10 beats a force to theskin 12, the force is received by thecontact 3 of the flexible piezoelectric sensor and transmitted to the flexiblepiezoelectric sensor 2, and the flexiblepiezoelectric sensor 2 can output an electrical signal.

如图4、5所示，传感器骨架1为长条状的曲面形状，其一侧为柔性压电传感器2提供支撑，如图3A所示，传感器骨架1连接柔性压电传感器2的一侧包含一个向下凹的空间8，柔性压电传感器2平铺在向下凹的空间8上方，边缘固定在向下凹的空间8周边，如图3A所示为四周均固定，此时向下凹的空间8上方的柔性薄膜悬空。此悬空结构使得柔性压电传感器2的柔性薄膜所受到的正向压力转换为向四周的拉扯力，从而极大提高了柔性薄膜所承受的压强，因此使其产生更大的压电信号，从而提高了传感器灵敏度。传感器骨架1另一侧固定静态压力传感器4，静态压力传感器4另一侧与加压装置9相连，用于检测此传感器结构所受到的整体压力。其中加压装置9例如采用可充气的绷带，或者可膨胀的气囊等As shown in Figures 4 and 5, thesensor frame 1 is in the shape of a long curved surface, and one side of thesensor frame 1 provides support for the flexiblepiezoelectric sensor 2. As shown in Figure 3A, the side of thesensor frame 1 connected to the flexiblepiezoelectric sensor 2 includes a Aconcave space 8, the flexiblepiezoelectric sensor 2 is tiled above theconcave space 8, and the edge is fixed on the periphery of theconcave space 8, as shown in FIG. The flexible film above thespace 8 is suspended. This suspended structure converts the positive pressure on the flexible film of the flexiblepiezoelectric sensor 2 into a pulling force to the surrounding area, thereby greatly increasing the pressure on the flexible film, so that it generates a larger piezoelectric signal, thereby Improved sensor sensitivity. Astatic pressure sensor 4 is fixed on the other side of thesensor frame 1, and the other side of thestatic pressure sensor 4 is connected with apressurizing device 9 for detecting the overall pressure received by the sensor structure. The pressurizingdevice 9 is, for example, an inflatable bandage, or an inflatable air bag, etc.

如图4所示，传感器阵列包括多孔的弹性缓冲材料7和五个上述的脉搏波传感器6-1、6-2、6-3、6-4、6-5。该传感器阵列平铺在被测手臂上，由于弹性缓冲材料7的特性，五个传感器6-1、6-2、6-3、6-4、6-5可以根据被测人手型贴附在手臂表面。当脉搏跳动时弹性缓冲材料7还可以吸收多余的冲击，减少某一传感器下的脉搏跳动点对临近传感器的影响，减少传感器间相互干扰。As shown in FIG. 4 , the sensor array includes a porouselastic buffer material 7 and five above-mentioned pulse wave sensors 6-1, 6-2, 6-3, 6-4, and 6-5. The sensor array is tiled on the tested arm. Due to the characteristics of theelastic buffer material 7, the five sensors 6-1, 6-2, 6-3, 6-4, 6-5 can be attached to the tested human hand shape. arm surface. When the pulse is beating, theelastic buffer material 7 can also absorb the excess shock, reduce the influence of the pulse beating point under a certain sensor on the adjacent sensors, and reduce the mutual interference between the sensors.

该传感器阵列用于探测桡骨11附近桡动脉10在不同压力下的脉搏跳动。每个传感器沿腕部等间距依次排开。第一传感器6-1贴近腕横纹手掌一侧，第二至五传感器6-2、6-3、6-4、6-5从腕横纹手臂一侧依次排开。该分布可以适用于不同人群手臂长度，增大桡动脉10波动探测长度。当外界有加压装置9对传感器阵列施加压力时，静态压力传感器4感受来自传感器上方弹性缓冲材料1传递的静态压力，柔性压电传感器2用于测量桡动脉脉博。最终实现在不同压力下传感器阵列探测桡动脉脉搏信号。The sensor array is used to detect the pulse beat of theradial artery 10 near theradius 11 under different pressures. Each sensor is lined up at equal intervals along the wrist. The first sensor 6-1 is close to the palm side of the wrist crease, and the second to fifth sensors 6-2, 6-3, 6-4, and 6-5 are arranged in sequence from the arm side of the wrist crease. This distribution can be applied to arm lengths of different people, increasing the detection length ofradial artery 10 fluctuations. When apressure device 9 exerts pressure on the sensor array outside, thestatic pressure sensor 4 senses the static pressure transmitted from theelastic buffer material 1 above the sensor, and the flexiblepiezoelectric sensor 2 is used to measure the radial artery pulse. Finally, the sensor array can detect the radial artery pulse signal under different pressures.

作为上述实施方式的变种，如图3B、3C所示，柔性压电传感器2的柔性薄膜可以只有两面固定(图3B)；或者三面固定(图3C)，其中斜线部分表示向下凹的空间8与柔性薄膜的重叠部位；或者通过伸出的夹具完全悬置于该向下凹的空间8上方；这些均不影响本发明的技术效果的实现。此外，为了防止柔性压电传感器2的柔性薄膜的折叠和变形，可以在该柔性薄膜上设置加强筋或导向条使其尽量向固定的某些方向弯曲，从而避免其误动作。As a variant of the above-mentioned embodiment, as shown in FIGS. 3B and 3C , the flexible film of the flexiblepiezoelectric sensor 2 can be fixed on only two sides ( FIG. 3B ); or fixed on three sides ( FIG. 3C ), where the slashed part represents theconcave space 8 and the overlapping portion of the flexible film; or completely suspended above the downwardlyconcave space 8 by the protruding clamp; these do not affect the realization of the technical effect of the present invention. In addition, in order to prevent the flexible film of the flexiblepiezoelectric sensor 2 from being folded and deformed, a reinforcing rib or guide strip can be provided on the flexible film to bend it in certain fixed directions as much as possible, so as to avoid its malfunction.

以上所述的具体实施例，对本发明的目的、技术方案和有益效果进行了进一步详细说明，应理解的是，以上所述仅为本发明的具体实施例而已，并不用于限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above-mentioned specific embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention. Within the spirit and principle of the present invention, any modifications, equivalent replacements, improvements, etc. made should be included within the protection scope of the present invention.

Claims (6)

Translated fromChinese

1.一种脉搏波传感器，包括静态压力传感器和柔性压电传感器，其特征在于：1. a pulse wave sensor, comprising a static pressure sensor and a flexible piezoelectric sensor, is characterized in that:所述柔性压电传感器用于感测脉搏波并产生电信号；其中，所述柔性压电传感器为柔性薄膜传感器；其中，所述柔性薄膜传感器上设置有加强筋或导向条；The flexible piezoelectric sensor is used for sensing pulse waves and generating electrical signals; wherein, the flexible piezoelectric sensor is a flexible film sensor; wherein, the flexible film sensor is provided with reinforcing ribs or guide bars;其中，所述静态压力传感器用于感测施加在该脉搏波传感器上的静态压力；Wherein, the static pressure sensor is used for sensing the static pressure applied on the pulse wave sensor;所述柔性压电传感器和/或静态压力传感器上设置有触点，所述触点的材质选自硅胶、泡棉或海绵；The flexible piezoelectric sensor and/or the static pressure sensor are provided with contacts, and the materials of the contacts are selected from silica gel, foam or sponge;其中，所述柔性压电传感器与静态压力传感器通过传感器骨架固定，其中，所述传感器骨架为长条状的曲面形状；所述柔性压电传感器平铺于所述传感器骨架的凹面侧，所述静态压力传感器固定于所述传感器骨架的另一侧；其中，所述柔性薄膜传感器的三面与所述传感器骨架的凹面侧固定或与伸出的夹具连接并完全悬置于所述凹面侧上；Wherein, the flexible piezoelectric sensor and the static pressure sensor are fixed by a sensor frame, wherein the sensor frame is in the shape of a long curved surface; the flexible piezoelectric sensor is laid flat on the concave side of the sensor frame, and the The static pressure sensor is fixed on the other side of the sensor frame; wherein, the three sides of the flexible film sensor are fixed with the concave side of the sensor frame or are connected with a protruding clamp and completely suspended on the concave side;所述脉搏波传感器包括多个，且形成脉搏波传感器阵列；其中，所述脉搏波传感器阵列包括弹性缓冲材料，多个所述脉搏波传感器以一定间隔分布在所述弹性缓冲材料上。The pulse wave sensor includes a plurality of and forms a pulse wave sensor array; wherein, the pulse wave sensor array includes an elastic buffer material, and a plurality of the pulse wave sensors are distributed on the elastic buffer material at certain intervals.2.如权利要求1所述的脉搏波传感器，其特征在于，所述静态压力传感器为MEMS传感器、压阻膜传感器或应变计式传感器。2 . The pulse wave sensor according to claim 1 , wherein the static pressure sensor is a MEMS sensor, a piezoresistive film sensor or a strain gauge sensor. 3 .3.如权利要求1所述的脉搏波传感器，其特征在于，所述柔性压电传感器为压电式压力传感器，压电材料采用PVDF、PZT或BaTiO₃材料。3 . The pulse wave sensor according to claim 1 , wherein the flexible piezoelectric sensor is a piezoelectric pressure sensor, and the piezoelectric material is PVDF, PZT or BaTiO₃ material. 4 .4.如权利要求1所述的脉搏波传感器，其特征在于，所述弹性缓冲材料为聚氨酯海绵或慢回弹记忆海绵；4. The pulse wave sensor according to claim 1, wherein the elastic buffer material is polyurethane sponge or slow-rebound memory foam;所述脉搏波传感器的个数为3、4、5、6、7、8、9或10个。The number of the pulse wave sensors is 3, 4, 5, 6, 7, 8, 9 or 10.5.一种脉搏波测量方法，利用脉搏波传感器，该脉搏波传感器包括静态压力传感器和柔性压电传感器，该方法包括以下步骤：5. A pulse wave measurement method using a pulse wave sensor comprising a static pressure sensor and a flexible piezoelectric sensor, the method comprising the steps of:通过柔性压电传感器感测脉搏波并产生电信号；其中，所述柔性压电传感器为柔性薄膜传感器；其中，所述柔性薄膜传感器上设置有加强筋或导向条；The pulse wave is sensed by a flexible piezoelectric sensor and an electrical signal is generated; wherein, the flexible piezoelectric sensor is a flexible film sensor; wherein, the flexible film sensor is provided with reinforcing ribs or guide bars;通过静态压力传感器在大压力范围下感测施加在该脉搏波传感器的静态压力；Sensing the static pressure applied to the pulse wave sensor in a large pressure range by the static pressure sensor;所述柔性压电传感器和/或静态压力传感器上设置有触点，所述触点的材质选自硅胶、泡棉或海绵；The flexible piezoelectric sensor and/or the static pressure sensor are provided with contacts, and the materials of the contacts are selected from silica gel, foam or sponge;其中，所述柔性压电传感器与静态压力传感器通过传感器骨架固定，其中，所述传感器骨架为长条状的曲面形状；所述柔性压电传感器平铺于所述传感器骨架的凹面侧，所述静态压力传感器固定于所述传感器骨架的另一侧；其中，所述柔性薄膜传感器的三面与所述传感器骨架的凹面侧固定或与伸出的夹具连接并完全悬置于所述凹面侧上；以及Wherein, the flexible piezoelectric sensor and the static pressure sensor are fixed by a sensor frame, wherein the sensor frame is in the shape of a long curved surface; the flexible piezoelectric sensor is laid flat on the concave side of the sensor frame, and the The static pressure sensor is fixed on the other side of the sensor frame; wherein, the three sides of the flexible film sensor are fixed with the concave side of the sensor frame or are connected with a protruding clamp and completely suspended on the concave side; as well as其中，所述脉搏波传感器包括多个，且形成脉搏波传感器阵列；所述脉搏波传感器阵列包括弹性缓冲材料，多个所述脉搏波传感器以一定间隔分布在所述弹性缓冲材料上。The pulse wave sensor includes a plurality of pulse wave sensors and forms a pulse wave sensor array; the pulse wave sensor array includes an elastic buffer material, and a plurality of the pulse wave sensors are distributed on the elastic buffer material at certain intervals.6.如权利要求5所述的脉搏波测量方法，其特征在于，所述静态压力传感器为MEMS传感器、压阻膜传感器或应变计式传感器；6. The pulse wave measurement method according to claim 5, wherein the static pressure sensor is a MEMS sensor, a piezoresistive film sensor or a strain gauge sensor;所述柔性压电传感器为压电式压力传感器，压电材料采用PVDF、PZT或BaTiO₃材料。The flexible piezoelectric sensor is a piezoelectric pressure sensor, and the piezoelectric material adopts PVDF, PZT or BaTiO₃ material.

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