Array piezoresistive tactile sensor adopting voltage array feedback method to weaken return circuit interference of scanning circuits

Abstract

An array piezoresistive tactile sensor adopting voltage array feedback method to weaken return circuit interference of scanning circuits belongs to the field of array piezoresistive tactile sensors. The sensor solves the problem of a return circuit interference of a scanning circuit in the array piezoresistive tactile sensor, simultaneously realizes the more simple circuit. The sensor weakens thereturn circuit interference of the line scanning circuit of the array piezoresistive tactile sensor after transferring output voltage signals of the current scanning line on a signal collecting flexible circuit board to a switch circuit and an amplifier circuit, namely the signals are divided into two paths, one path of the signals are converted into the digital quantity through an ADC circuit, thereby realizing collecting the tactile sense information, the other path of the signals are fed back into non-sampling array electrodes through a first analog signal output storage and analog switch,and a logical control circuit controls a multiway switch to provide standard high voltage for the current scanning line on the tactile sense signal collecting flexible circuit board. The array piezoresistive tactile sensor can effectively weaken the return circuit interference of scanning circuits.

Description

technical field [0001] The invention relates to an array piezoresistive tactile sensor which adopts a voltage column feedback method to weaken the interference of a scanning circuit loop, belonging to an array piezoresistive tactile sensor. Background technique [0002] The existing array piezoresistive tactile sensor adopts the form of row and column scanning to collect signals, which can effectively reduce the number of external leads of the tactile sensor. However, while reducing the external leads, the loop interference problem of the row-column scanning circuit is inevitably generated. The existing methods for eliminating loop interference include: using silicon technology to preprocess and integrate the tactile unit, integrating the integrated circuit and the sensor and connecting diodes in series, this method increases the cost of sensor fabrication and makes the tactile sensor lack flexibility; There is a method of voltage feedback. This method feeds back the output...

AI Technical Summary

Problems solved by technology

However, while reducing the external leads, the loop interference problem of the row-column scanning circuit is unavoidable.

The existing methods of eliminating loop interference include: using silicon technology to preprocess and integrate the tactile unit, integrating the integrated circuit with the sensor and connecting diodes in series. This method increases the production cost of the sensor and makes the tactile sensor lack of flexibility; There is a method of voltage feedback. This method feeds back the output voltage of the current scanning column to the non-current scanning row and non-current scanning column at the same time. Although it can effectively weaken the loop interference of the scanning circuit, it does not affect the compliance of the tactile sensor. However, the implementation circuit is very complicated, which affects the reliability of the entire system and the miniaturization of the processing circuit

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