A self-correcting system based on graphene sensors

Abstract

The invention provides a graphene sensor-based self-calibration system, including a power supply, a graphene sensor, a piezoelectric conversion circuit for converting the deformation information of the graphene sensor into an analog signal, and a piezoelectric conversion circuit for converting the analog signal to an analog signal. An analog-to-digital converter that converts signals into digital signals, and a microcontroller; wherein, one end of the microcontroller is connected to the output of the analog-to-digital converter, and the other end is connected to a piezoelectric conversion circuit for outputting according to the analog-to-digital converter The digital signal controls and adjusts the resistance value of the piezoelectric conversion circuit, so as to control and adjust the digital signal output by the analog-to-digital converter to meet the threshold condition. The invention ensures that the analog-to-digital converter has the largest dynamic range, makes the analog-to-digital converter have the best linearity, and improves the accuracy of subsequent circuit processing data.

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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