Data reading method and device for resistance sensor array

Abstract

The invention discloses a data reading method for a resistance sensor array and belongs to the technical field of sensors. The method comprises following steps: S1. adding a line of n standard resistances with known resistance values into a M*N resistance sensor array sharing a line and alignment in advance to obtain a (M+1)*(N) resistance array sharing line and alignment; S2. by use of a multiplexer, grounding the kth line of the M*N resistance sensor array successively, connecting the other lines of the M*N resistance sensor array and the standard resistance line with an excitation voltage VI, and measuring the measuring voltage of the standard resistance line, and voltages of each line and each row; S3. according to the voltage data of each line and each row, calculating the resistance values of M*N resistance sensors in the resistance array. The invention also discloses a data reading device of a resistance sensor array and a sensor system. By use of the method and device, rapid detection of the resistance sensor array is realized and measurement precision and range are increased.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a data readout method and device for a resistive sensor array. Background technique [0002] The array sensing device is to combine multiple sensing elements with the same performance according to the structure of a two-dimensional array. It can change or generate corresponding shapes and characteristics by detecting changes in parameters focused on the array. This feature is widely used in biosensing, temperature tactile and thermal imaging based on infrared sensors, etc. [0003] Resistive sensing arrays are widely used in infrared imaging simulation systems, force tactile sensing and temperature tactile sensing. Taking temperature touch as an example, since the temperature sensing device involves the transfer of heat and the perception of temperature, in order to obtain the thermal properties of the object, the device puts forward higher requirements for the temperature measu...

AI Technical Summary

Problems solved by technology

Using a 16×16 array network bolometer array for verification, only 32 pins are used, it has been confirmed that the model can effectively distinguish device damage or small changes in device value, it has a certain accuracy, but there is still a problem in detection speed technical flaw

In 2009, Y.J.Yang et al. proposed a 32×32 array of temperature and tactile sensing arrays for the artificial skin of the robotic arm. In order to ensure the detection accuracy, the circuit shields the interference of non-tested resistances in the array. Operational amplifier circuits are introduced in one column, and the circuit complexity is greatly increased, and the interference of internal resistance cannot be effectively avoided. The detection efficiency, circuit complexity and avoiding the interference of equivalent internal resistance inside electronic devices have become the biggest technical bottlenecks.

Although this method largely avoids crosstalk current, reduces circuit complexity, and has a high detection speed, it does not take into account the existence of equivalent internal resistance when outputting high and low levels through a single-chip microcomputer, and the range of resistance values ​​in the array Limited to a certain interval, the problem of measuring the resistance value in a large range has not been solved, so it is necessary to find a method that can effectively avoid the interference of the equivalent internal resistance of the voltage output port, and at the same time, it is also necessary in the resistance range. further expansion

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