Sensor device used for surface parameter detection

Abstract

The invention relates to a sensor device used for surface parameter detection. The sensor device comprises a control module, a data acquisition device, a current source driving module, a voltage measuring module, a constant current source and a sensor array. The current source driving module and the voltage measuring module comprise two multiplexers of which the output potential pins are connectedin parallel. The output potential pins of the multiplexers are connected in parallel and then connected with multiple electrodes of the sensor array so that the current source driving module and thevoltage measuring module are enabled to form a multichannel analog switch. When the surface resistance is detected, the control module performs gating and switching on the connection between the multichannel analog switch and multiple electrodes of the sensor array to realize transmission of the excitation current and acquisition of the voltage signal and acquires the electrical impedance tomography according to the received voltage data and converts the surface resistance into the corresponding surface parameter. The pressure distribution, the stress and other parameters are measured by usingthe electrical impedance tomography technology so that the conduction resistance is low, the leakage current is low and the acquisition accuracy is high.

Description

technical field [0001] The invention relates to sensing technology, in particular to a sensor device for surface parameter detection. Background technique [0002] Intelligent manufacturing has increasingly become a major trend and core content of future manufacturing development. With the development of intelligent manufacturing, especially in robotics, there are higher requirements for the sensitivity, accuracy, reliability and environmental adaptability of sensing technology, such as quantum measurement, nano-polymer sensing, optical fiber sensing, etc. Sensing technology using new principles, new materials, and new processes is particularly critical in the extraction and processing of weak sensing signals, and the acquisition methods of these parameters are indeed the most important. An accurate and fast parameter measurement and reading method is beneficial to our later information processing and analysis. [0003] Electrical impedance imaging (EIT) is a non-invasive ...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing sensors used to detect living organisms detect the occurrence of biological (such as human) behaviors by touching the pressure generated, but for large two-dimensional planes and curved surfaces, simply arrange a large number of pressure-sensitive point sensors to Spreading over the entire surface will lead to waste of resources and loss of energy

This type of sensor generally uses a sensing material that is easy to deform, such as a film-shaped PVDF piezoelectric material or other flexible piezoelectric material, which is converted into a voltage change by a conversion circuit to obtain relevant pressure information, and the pressure value measured at one point to replace the surrounding pressure values, or use multi-point measured pressure values ​​to characterize the pressure distribution of the entire surface; on the one hand, it will lead to inaccurate pressure distribution detection; Handling can cause the electrodes of the array sensor to break

Therefore, simply arranging a large number of pressure-sensitive point sensors to spread over the entire surface to measure the pressure is not realistic.

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