Pulse wave sensor, sensor array, and pulse wave measurement method

Abstract

The invention provides a pulse wave sensor, a sensor array, and a pulse wave measurement method. 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 to measure a static pressure applied to the pulse wave sensor. The sensor of the invention measuresthe static pressure signal and the dynamic pulse wave pressure signal separately, the piezoelectric film is used to measure the dynamic pressure fluctuation, and the piezoresistive sensor measures the static pressure, so that the dynamic sensitivity is not affected by the static pressure measuring range, and the high sensitivity to the pulse wave can be maintained under the wide range of static pressure; The sensor of the invention adopts a flexible skeleton, so that the array composed of the sensor can meet the characteristics of the wrists of different crowds and realize good bonding to thesurface of the arm.

Description

technical field [0001] The invention belongs to the technical field of non-invasive detection of human health status, in particular relates to a device for collecting radial artery pulse waves, and more specifically relates to a pulse wave sensor, a sensor array and a pulse wave measurement method. Background technique [0002] Pulse waveform can reflect the degree of human health and various diseases. Pulse wave measurement methods are divided into invasive and non-invasive. Invasive pulse wave measurement methods cause great harm to patients, while non-invasive methods do little harm to patients, such as pressure sensors, ultrasonic sensors, photoelectric sensors, etc. These sensors all enable non-invasive measurement of pulse waves. However, the current mainstream method of measuring pulse wave is still the pressure sensor to measure the pulse wave. Some devices use thin-film piezoresistive pressure sensors to collect pulses at multiple points on the wrist, some device...

AI Technical Summary

Problems solved by technology

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 resolution ability for force, and cannot output morphologically meaningful pulse waves under low pressure.

[0004] In addition, there are two problems in the existing sensor array. One problem is that the sensor array cannot meet the problem of fitting the arms of different groups of people. The poor fit of the array cannot guarantee the fidelity of the pulse wave collection; The problem of mutual interference between sensors can cause pulse waves collected by adjacent sensors to overlap each other, affecting the accuracy of pulse waves

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