Self-correcting system based on graphene sensor

Abstract

The invention provides a self-correcting system based on a graphene sensor. The self-correcting system based on the graphene sensor comprises a power supply, the graphene sensor, a piezoelectric conversion circuit used for converting deformation information generated by the graphene sensor into analog signals, an analog-to-digital converter used for converting the analog signals into digital signals, and a microcontroller, wherein one end of the microcontroller is connected with the output end of the analog-to-digital converter; the other end of the microcontroller is connected with the piezoelectric conversion circuit to be used for controlling and adjusting the value of resistance of the piezoelectric conversion circuit according to the digital signals output by the analog-to-digital converter so as to control and adjust the digital signals output by the analog-to-digital converter to meet threshold conditions. The system can ensure the largest dynamic range of the analog-to-digital converter, so that the analog-to-digital converter has the best linearity, and the accuracy of processing data by a following circuit can be improved.

Description

technical field [0001] The invention relates to the technical field of correction, and more specifically, relates to a self-calibration system based on a graphene sensor. Background technique [0002] Graphene sensor is a material that changes its own resistance value through deformation. It is light, thin, soft, highly plastic, sensitive to deformation, low in cost, and easy to mass-produce. Therefore, based on the above-mentioned advantages of graphene sensors, graphene sensors are widely used, for example, they are applied to application scenarios such as running posture recognition and pulse recognition. [0003] The intrinsic resistance of the graphene sensor is the resistance exhibited by the graphene sensor when there is no deformation of the graphene sensor. [0004] In an application system including a graphene sensor, it is necessary to include a piezoelectric conversion circuit connected to the graphene sensor and an analog-to-digital converter connected to the p...

AI Technical Summary

Problems solved by technology

[0008] In view of this, the present invention provides a graphene sensor-based self-calibration system to solve the problem of analog-to-digital converter failure caused by the inability to ensure that the voltage values ​​output by the piezoelectric conversion circuit are all at the correct voltage value in the prior art. The reduction of the dynamic range makes the data easy to overflow, which leads to errors in the processing of the subsequent circuit, and when the static operating point of the analog-to-digital converter is not at the correct voltage value, the linearity of the analog-to-digital converter is reduced, resulting in a The error of the conversion result of the converter increases, which reduces the accuracy of the data processed by the subsequent circuit

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