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Simple body touch sensing method based on STM32

A technology of touch sensing and human body, applied in the input/output process of data processing, instruments, electrical digital data processing, etc., to achieve the effect of intelligent interaction

Pending Publication Date: 2020-12-29
双擎科技(杭州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the defect of the existing technology is: the sensitivity of the channel needs to be determined by the capacitance of the external capacitor and the software threshold. If more precise control is required, the frequency of touch signal acquisition needs to be increased.

Method used

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  • Simple body touch sensing method based on STM32
  • Simple body touch sensing method based on STM32
  • Simple body touch sensing method based on STM32

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017]A simple human touch sensing method based on STM32. The parts that realize human touch sensing include: STM32 single-chip microcomputer with TSC function, TSC sampling capacitor, touch channel circuit, touch channel circuit including conductive copper foil 1, dielectric 3, wire 2, and Human fingers and palms, the conductive copper foil 1 is attached to the dielectric 3, and is connected to the touch channel through the wire 2. When the human fingers or palm touch the dielectric 3, a capacitor is formed, and the register value is obtained by software to determine whether there is Touch status.

[0018]Further, the dielectric 3 is made of ABS plastic material.

[0019]Further, the conductive copper foil 1 is a double-sided conductive copper foil with adhesive, with an area of ​​4cm*4cm and a thickness of 0.1mm.

[0020]The technical solution of the present invention connects the conductive copper foil 1 with the touch channel of STM32 through the wire 2. When the palm of the human body t...

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PUM

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Abstract

The invention discloses a simple body touch sensing method based on STM32. The part for realizing body touch sensing comprises an STM32 single-chip microcomputer with a TSC function, a TSC sampling capacitor and a touch channel circuit, wherein the touch channel circuit comprises a conductive copper foil, a dielectric, a wire, body fingers and a palm; the conductive copper foil is attached to thedielectric and get access to a touch channel through the wire; when the body fingers or the palm make contact with the dielectric, a capacitor is formed, and whether a touch state exists or not is determined by obtaining the value of a register through software. According to the technical scheme, more intelligent improvement is achieved in the aspects of touch contact and control, and low-cost andintelligent interaction is achieved.

Description

Technical field[0001]The present invention relates to touch sensing technology, in particular to the realization of a simple human touch sensing function based on the STM32-TSC function.Background technique[0002]The TSC of STM32 is based on the principle of charge transfer. When the TSC function is started, the chip will conduct charge transfer by controlling the switch of the MOS tube. The circuit is attached.figure 1 As shown, by obtaining the value of the number of charge transfers, the number of charge transfers is greater when the human body is not touched, and the number of charge transfers is less when there is a touch. The software uses the threshold to recognize human touch. If the threshold is greater than the threshold, there is no human touch, and if the threshold is less than the threshold, There is touch. The TSC function is more flexible, and the recognition sensitivity can be improved through peripheral circuits and software thresholds.[0003]General TSC functions are...

Claims

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Application Information

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IPC IPC(8): G06F3/041G06F3/044
CPCG06F3/041G06F3/0416G06F3/044
Inventor 秦恒东林森
Owner 双擎科技(杭州)有限公司