WO2019010615A1 - Capteur d'onde d'impulsion, réseau de capteurs et méthode de mesure d'onde d'impulsion - Google Patents

Capteur d'onde d'impulsion, réseau de capteurs et méthode de mesure d'onde d'impulsion Download PDF

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Publication number
WO2019010615A1
WO2019010615A1 PCT/CN2017/092399 CN2017092399W WO2019010615A1 WO 2019010615 A1 WO2019010615 A1 WO 2019010615A1 CN 2017092399 W CN2017092399 W CN 2017092399W WO 2019010615 A1 WO2019010615 A1 WO 2019010615A1
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Prior art keywords
sensor
pulse wave
static pressure
flexible
flexible piezoelectric
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PCT/CN2017/092399
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English (en)
Chinese (zh)
Inventor
刘苏
张劭龙
耿兴光
张以涛
张俊
侯洁娜
张海英
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中国科学院微电子研究所
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Priority to PCT/CN2017/092399 priority Critical patent/WO2019010615A1/fr
Publication of WO2019010615A1 publication Critical patent/WO2019010615A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure

Definitions

  • the present disclosure belongs to the field of non-invasive detection technology for human health, and in particular relates to a device for collecting brachial artery pulse waves, and more particularly to a pulse wave sensor, a sensor array and a pulse wave measuring method.
  • Pulse waveforms reflect human health and a variety of diseases. Pulse wave measurement methods are classified into invasive and non-invasive. The invasive pulse wave measurement method causes great damage to the patient, and the non-invasive type has little damage to the patient, such as a pressure sensor, an ultrasonic sensor, a photoelectric sensor, and the like. These sensors enable non-invasive measurement of pulse waves. However, the current mainstream method of measuring pulse waves is still a pressure sensor to measure pulse waves. Some devices use a piezoresistive pressure sensor to pulse multiple points on the wrist. Some devices use strain gauges as pulse wave sensors, and some devices use MEMS piezoresistive sensors to detect pulse. The dynamic range of the above sensor is limited by the material itself, and the sensitivity is limited by the range.
  • Pressure sensors with pure piezoelectric principle have high sensitivity and the output amplitude is not affected by static pressure, but piezoelectric sensors cannot measure static pressure. Therefore, the two sensors independently used for pulse wave measurement can not effectively reflect the physical condition of the person being tested. If you want to reflect the type of disease through the pulse wave, pulse waves must be acquired over a wide range of static pressures. However, the sensitivity of current piezoresistive sensors is determined by the range in which the force is applied. This results in a small-range pressure sensor range that does not meet the test requirements. The large-range sensor output voltage has a low resolution of force, and cannot output a morphological pulse wave at low pressure.
  • the existing sensor array has two problems.
  • One problem is that the sensor array cannot meet the problem of arm shape fit of different people.
  • the difference in array fit cannot guarantee the acquisition of pulse waves.
  • the fidelity Another problem is the mutual interference between the sensors caused by the deformation of the sensor. This problem can superimpose the pulse waves collected by adjacent sensors and affect the accuracy of the pulse wave.
  • the main object of the present disclosure is to provide a pulse wave sensor, a sensor array, and a pulse wave measuring apparatus using the same, to solve at least one of the above technical problems.
  • the present disclosure provides a pulse wave sensor including a static pressure sensor and a flexible piezoelectric sensor, characterized in that:
  • the flexible piezoelectric sensor is configured to sense a pulse wave and generate an electrical signal
  • the static pressure sensor is for sensing a static pressure applied to the pulse wave sensor.
  • the present disclosure also provides a pulse wave sensor array including an elastic buffer material and a plurality of pulse wave sensors as described above, wherein a plurality of the pulse wave sensors are distributed at intervals in the elastic buffer On the material.
  • the present disclosure further provides a pulse wave measuring method, including the following steps:
  • the static pressure exerted on the pulse wave sensor is sensed by a static pressure sensor over a large pressure range.
  • the pulse wave sensor of the present disclosure has the following beneficial effects: the sensor overcomes the problem that the pulse wave collecting device in the prior art cannot accurately and comprehensively reflect the pulse information of the human body, and the traditional piezoresistive sensor range and The sensitivity is inversely proportional.
  • the pulse wave sensor needs to capture the weak pulse signal in a large range of range, while the conventional piezoresistive sensor has lower sensitivity in a large range of range, and the sensor of the present disclosure separately measures the static pressure signal and the dynamic pulse wave pressure signal, and utilizes Piezoelectric film measures dynamic pressure fluctuations, piezoresistive sensor Static pressure, so that the dynamic sensitivity is not affected by the static pressure range, can maintain high sensitivity to pulse wave under a wide range of static pressure; the sensor of the present disclosure uses a long curved surface skeleton and elastic buffer material as a support to constitute The array can meet the wrist characteristics of different groups of people, achieving a good fit on the arm surface.
  • FIG. 1 is a schematic structural view of a pulse wave sensor of the present disclosure
  • FIG. 2 is a side elevational view of the pulse wave sensor array structure of the present disclosure
  • 3A-3C are schematic diagrams showing the positional relationship between the downwardly concave space on the sensor skeleton of the present disclosure and the flexible film of the flexible piezoelectric sensor, respectively;
  • FIG. 4 is a schematic view showing the positional relationship between the pulse wave measuring device and the radial artery of the present disclosure
  • Fig. 5 is a front elevational view showing the positional relationship between the pulse wave sensor array structure of the present disclosure and the radial artery.
  • the present disclosure is to solve the problem that the pulse wave collecting device in the prior art cannot accurately and comprehensively reflect the pulse information of the human body.
  • Traditional piezoresistive sensor ranges are inversely proportional to sensitivity. Pulse wave sensors need to capture weak pulse signals over a wide range of ranges, while conventional piezoresistive sensors have lower sensitivity over a wide range of ranges.
  • the static pressure signal is measured separately from the dynamic pulse wave pressure signal, the dynamic pressure fluctuation is measured by the piezoelectric film, and the static pressure is measured by the piezoresistive sensor, thereby improving the sensitivity of the piezoelectric thin film sensor and making the pulse
  • the wave signal is sharper and the static pressure is accurately measured over a wide pressure range.
  • the present disclosure provides a structure for mitigating mutual interference between sensors and adapting to different groups of people's arms, in view of the problem of sensor state mutual influence and arm-fitting in existing sensor arrays.
  • the present disclosure discloses a pulse wave sensor including a flexible piezoelectric sensor and a static pressure sensor, wherein:
  • a flexible piezoelectric sensor for sensing a pulse wave
  • a static pressure sensor is used to measure the static pressure exerted on the pulse wave sensor.
  • the static pressure sensor may be a piezoresistive sensor, such as 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 the piezoelectric material thereof includes, for example, but not limited to, PVDF (polyvinylidene fluoride), PZT (lead zirconate titanate piezoelectric ceramic), BaTiO3, and the like.
  • the flexible piezoelectric sensor is further provided with a contact, and one side of the contact is connected with the skin to be tested, and is used for fitting the surface of the arm and conducting the pulse wave to be tested, and detecting the other side of the contact with the flexible piezoelectric sensor.
  • the cells are connected or in contact, and the pulse wave to be measured is conducted to the detecting unit of the flexible piezoelectric sensor.
  • the static pressure sensor is also provided with a contact, and the contact of the static pressure sensor is used to conduct the static pressure to the detection unit of the static pressure sensor.
  • 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 and 80 degrees.
  • the present disclosure also discloses a pulse wave sensor array including an elastic cushioning material and a plurality of the above-described pulse wave sensors, wherein the plurality of pulse wave sensors are distributed on the elastic cushioning material at intervals.
  • the elastic cushioning material includes, for example, but not limited to, a urethane sponge, a slow rebound memory foam, etc., and the pulse wave sensor array can be attached to the arms of different people.
  • the number of the pulse wave sensors is, for example, five, or three, four, six, seven, eight, nine, or ten, and are sequentially arranged at equal intervals along the measured wrist.
  • the first sensor is attached to the lateral side of the wrist to the side of the palm, and the remaining sensors are sequentially arranged in the direction of the elbow of the arm.
  • 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, which is finally realized at different pressures. Detection of brachial artery pulse signals by a lower pulse wave sensor array.
  • the present disclosure also discloses a pulse wave measuring method, including the following steps:
  • the static pressure exerted on the pulse wave sensor is sensed by a static pressure sensor over a large pressure range.
  • 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 made of PVDF, PZT or BaTiO3; as a preferred, the flexible piezoelectric sensor is flexible. Thin film sensor.
  • the pulse wave sensor of the present disclosure includes a sensor backbone, a flexible piezoelectric sensor, a flexible piezoelectric sensor contact, a static pressure sensor, a static pressure sensor contact.
  • the concave side of the sensor frame is connected to the flexible piezoelectric sensor for supporting the flexible piezoelectric sensor; the other side of the sensor frame is connected to 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 transmitted by the contact.
  • the other side of the contact is attached to the skin for adhering to the arm surface and conducting pulse waves.
  • the other side of the static pressure sensor is connected to a pressurizing device for detecting the overall pressure experienced by 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 the piezoelectric material includes but is not limited to materials such as PVDF, PZT, and BaTiO 3 .
  • the material of the contacts includes but is not limited to materials such as silicone, foam and sponge.
  • the pulse wave sensor array of the present disclosure comprises a porous elastic buffer material and five pulse wave sensors, the porous elastic buffer material is connected to five sensors, and the porous elastic buffer material is connected to one side of the static pressure sensor structure. It is used for absorption buffer and reduces vibration interference between sensors and external impact interference.
  • the porous elastic cushioning material allows the sensor array to fit the arms of different people.
  • the porous elastic cushioning material is not limited to a urethane sponge, a slow rebound memory foam, or the like.
  • Each sensor is sequentially spaced along the wrist at equal intervals.
  • the first sensor is placed close to the palm side of the wrist, and the second to fifth sensors are sequentially arranged from the side of the wrist. This distribution can be applied to different groups of arm lengths, increasing the length of the radial artery fluctuation detection.
  • the pulse wave sensor of the present disclosure includes a sensor skeleton 1, a flexible piezoelectric sensor 2, a contact 3 of a flexible piezoelectric sensor, a static pressure sensor 4, and a contact 5 of a static pressure sensor.
  • the contact 3 of the flexible piezoelectric sensor is in contact with the skin 12, the material property of the contact 3 of the flexible piezoelectric sensor enables it to fit the skin, and the contact 3 of the flexible piezoelectric sensor has a certain elastic deformation to make the arm radial artery 10
  • the pulse wave is transmitted to the flexible piezoelectric sensor 2.
  • the flexible piezoelectric sensor is attached to the sensor frame 1 in a curved state, and converts the pulse wave fluctuations transmitted by the contacts 3 of the flexible piezoelectric sensor into electrical signals, and the converted electrical signals are output through the two poles of the flexible piezoelectric sensor 2.
  • the flexible piezoelectric sensor 2 can output an electrical signal.
  • the sensor frame 1 has a long curved surface shape, and one side is soft.
  • the piezoelectric sensor 2 provides support.
  • one side of the sensor frame 1 connected to the flexible piezoelectric sensor 2 includes a downwardly concave space 8, and the flexible piezoelectric sensor 2 is laid flat above the downwardly concave space 8.
  • the edge is fixed to the periphery of the downwardly concave space 8, as shown in Fig. 3A, and is fixed around the periphery, and the flexible film above the downwardly concave space 8 is suspended.
  • the suspended structure converts the forward pressure received by the flexible film of the flexible piezoelectric sensor 2 into a pulling force to the periphery, thereby greatly increasing the pressure of the flexible film, thereby causing a larger piezoelectric signal, thereby Increased sensor sensitivity.
  • the other side of the sensor frame 1 is fixed with a static pressure sensor 4, and the other side of the static pressure sensor 4 is connected to a pressurizing device 9 for detecting the overall pressure experienced by the sensor structure.
  • the pressing device 9 is, for example, an inflatable bandage, or an inflatable balloon, etc.
  • the sensor array comprises a porous elastic cushioning material 7 and five of the aforementioned pulse wave sensors 6-1, 6-2, 6-3, 6-4, 6-5.
  • the sensor array is laid flat on the arm to be tested. Due to the characteristics of the elastic cushioning material 7, the five sensors 6-1, 6-2, 6-3, 6-4, 6-5 can be attached according to the measured hand type. Arm surface.
  • the elastic buffer material 7 can also absorb the extra impact, reduce the influence of the pulse beat point under a certain sensor on the adjacent sensor, and reduce mutual interference between the sensors.
  • the sensor array is used to detect pulse beats of the iliac artery 10 near the tibia 11 at different pressures. Each sensor is sequentially spaced along the wrist at equal intervals.
  • the first sensor 6-1 is adjacent to the palm side of the wrist, and the second to fifth sensors 6-2, 6-3, 6-4, 6-5 are sequentially arranged from the side of the wrist horizontal arm. This distribution can be applied to different groups of arm lengths, increasing the length of the radial artery 10 fluctuation detection.
  • the outside pressurizing device 9 applies pressure to the sensor array
  • the static pressure sensor 4 senses the static pressure transmitted from the elastic cushioning material 1 above the sensor, and the flexible piezoelectric sensor 2 is used to measure the radial artery pulse.
  • the sensor array is used to detect the radial artery pulse signal under different pressures.
  • the flexible film of the flexible piezoelectric sensor 2 may be fixed only on both sides (FIG. 3B); or three-sidedly fixed (FIG. 3C), in which the hatched portion indicates a downwardly concave space. 8 overlapping portion with the flexible film; or completely suspended above the downwardly concave space 8 by the projecting jig; these do not affect the realization of the technical effects of the present disclosure.
  • Reinforcing ribs or guide strips may be provided on the flexible film to bend as far as possible in certain directions to avoid malfunction.

Abstract

L'invention concerne un capteur d'onde d'impulsion, un réseau de capteurs et une méthode de mesure d'onde d'impulsion. Le capteur d'onde d'impulsion comprend un capteur piézoélectrique flexible (2) et un capteur de pression statique (4), le capteur piézoélectrique flexible (2) étant utilisé pour détecter une onde d'impulsion et le capteur de pression statique (4) étant utilisé pour mesurer une pression statique appliquée sur le capteur d'onde d'impulsion. Les capteurs mesurent séparément des signaux de pression statique et des signaux de pression d'onde d'impulsion dynamique ; un film piézoélectrique est utilisé pour mesurer des fluctuations de pression dynamique et un capteur piézorésistif est utilisé pour mesurer des pressions statiques, ce qui permet de libérer la sensibilité dynamique de celui-ci de l'effet de la plage de mesure de pressions statiques, assurant une sensibilité élevée des ondes d'impulsion dans une large plage de pressions statiques ; le capteur utilise un cadre flexible (1), ce qui permet à un réseau assemblé de celui-ci de se conformer aux caractéristiques de poignet de différents types d'utilisateur et de réaliser un excellent ajustement entre le réseau et les surfaces de bras.
PCT/CN2017/092399 2017-07-10 2017-07-10 Capteur d'onde d'impulsion, réseau de capteurs et méthode de mesure d'onde d'impulsion WO2019010615A1 (fr)

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PCT/CN2017/092399 WO2019010615A1 (fr) 2017-07-10 2017-07-10 Capteur d'onde d'impulsion, réseau de capteurs et méthode de mesure d'onde d'impulsion

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PCT/CN2017/092399 WO2019010615A1 (fr) 2017-07-10 2017-07-10 Capteur d'onde d'impulsion, réseau de capteurs et méthode de mesure d'onde d'impulsion

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Citations (9)

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US20050038347A1 (en) * 2002-12-26 2005-02-17 Colin Medical Technology Corporation Pressure pulse wave sensor and pressure-pulse-wave analyzing apparatus
CN102144916A (zh) * 2011-04-21 2011-08-10 华东理工大学 一种可自动调压的多通道脉搏信号检测方法及装置
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CN103799999A (zh) * 2012-12-21 2014-05-21 常州先进制造技术研究所 基于压电蜂鸣片的无线脉搏仪装置
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CN105640513A (zh) * 2015-12-31 2016-06-08 中国科学院微电子研究所 脉搏波阵列式传感器采集系统及方法
CN106580273A (zh) * 2016-11-28 2017-04-26 中国科学院微电子研究所 脉搏波采集装置和脉搏波采集标定方法
CN106725363A (zh) * 2016-11-28 2017-05-31 中国科学院微电子研究所 脉搏波采集装置和脉搏波采集标定方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050038347A1 (en) * 2002-12-26 2005-02-17 Colin Medical Technology Corporation Pressure pulse wave sensor and pressure-pulse-wave analyzing apparatus
CN102144916A (zh) * 2011-04-21 2011-08-10 华东理工大学 一种可自动调压的多通道脉搏信号检测方法及装置
CN103799999A (zh) * 2012-12-21 2014-05-21 常州先进制造技术研究所 基于压电蜂鸣片的无线脉搏仪装置
CN103519793A (zh) * 2013-10-22 2014-01-22 詹北斗 多段复合式中医脉象采集装置
CN104000573A (zh) * 2014-05-29 2014-08-27 东北大学 基于体表两点脉搏波的中心动脉脉搏波监测系统及方法
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CN105640513A (zh) * 2015-12-31 2016-06-08 中国科学院微电子研究所 脉搏波阵列式传感器采集系统及方法
CN106580273A (zh) * 2016-11-28 2017-04-26 中国科学院微电子研究所 脉搏波采集装置和脉搏波采集标定方法
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