A Method for Locating and Measuring Pressure Using Connected Piezoresistive Sensor Array

Abstract

The invention relates to a pressure locating and measuring method used for a connected piezoresistive sensor array, and belongs to the technical field of measurement. According to the method, the piezoresistive calibration data of each sensitive unit of the connected piezoresistive sensor array in bearing pressure in each stress region are acquired firstly so that the resistance change normalized value of each sensitive unit, the upper threshold and the lower threshold are obtained; and the resistance change normalized values of all the sensitive units are compared with the upper threshold and the lower threshold firstly in the pressure locating and measuring process so as to ensure the stress region of bearing pressure, and then the size of the borne pressure is obtained by using the piezoresistive calibration data of each sensitive unit under the stress situation of the stress region and the resistance value of each sensitive unit. With application of the pressure locating and measuring method, the limitation that the measurement method used for the conventional piezoresistive sensor array cannot locate the pressure applied to the blind region can be solved so that the measurement region of the piezoresistive array can be extended, the use efficiency and the reliability of the sensitive units can be enhanced and thus the method is suitable for the field of artificial electronic skin development and large area of pressure measurement.

Description

technical field [0001] The invention belongs to the field of measurement technology, in particular to a pressure sensor array. Background technique [0002] The piezoresistive sensor array plays an important role in the modern measurement field. Compared with the traditional piezoresistive sensor array, the piezoresistive sensitive film in the connected piezoresistive array connects all the sensitive units in the array as a whole. Therefore, the force acting on any area of ​​the connected piezoresistive array will cause changes in the output signals of all sensitive units; the connected piezoresistive array not only eliminates the measurement blind area, expands the measurement area of ​​the piezoresistive array, but also improves Efficiency and reliability of sensitive units. However, the pressure measurement method that can be used for traditional piezoresistive sensor arrays cannot detect the pressure applied to the blind area, and cannot realize pressure positioning, so...

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Problems solved by technology

[0005] Utilizing the method of positioning and measuring pressure with a connected piezoresistive sensor array proposed by the present invention, it is possible to detect the pressure applied between the sensitive units, locate the area where the pressure is applied, and obtain the magnitude of the pressure, thereby solving the problem of traditional piezoresistive sensors. The measurement method of the sensor array cannot locate the limitation of the pressure applied to the blind area, which not only eliminates the measurement blind area, expands the measurement area of ​​the piezoresistive array, but also improves the use efficiency and reliability of the sensitive unit, which is suitable for the development of artificial electronic skin and large area pressure measurement and other fields

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