Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Detecting method of micro-capacitance of human body

A detection method and micro-capacitor technology, applied in the direction of measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve the problems of misjudgment, difficulty in detection, environmental temperature, temperature influence, etc., to avoid misjudgment, application promising effect

Inactive Publication Date: 2013-06-12
HARBIN ZHIMU TECH
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the extremely small capacitance of human body microcapacitance, when it forms a touch circuit with the wiring capacitance on the circuit board, if the contact area is small, it is extremely difficult to detect. In the past, the human body capacitive touch detection required the touch area to be large enough to make a judgment , otherwise it will be extremely difficult and easily cause misjudgment, and it will also be affected by ambient temperature and temperature, so the use is very limited

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Detecting method of micro-capacitance of human body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0011] Please refer to the attached figure 1 As shown, capacitors A and B are two round or square copper sheets with the same area and identical electrical properties that are laid on the circuit board to form a micro-capacitor with the ground wire. Capacitor A is the measurement Capacitors, the human body (or fingers) usually touch the copper area of ​​capacitor A, and capacitor B is a capacitor that is very similar to the capacitance of A, we call it a standard capacitor, which provides a basis for judging the measured value of capacitor A, During the measurement, the CPU of the single-chip microcomputer I sends PWM intermediate frequency or high-frequency signals to the capacitors A and B, and first closes the relay C downward, then the AC signal passes through B to the resistor D to form an AC voltage, due to the capacitive reactance of the capacitor to the current Function, the voltage amplitude must be attenuated, and the formed AC voltage value passes through the volta...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a detecting method of micro-capacitance of a human body. A capacitance A and a capacitance B are arranged on a circuit board, wherein the area of the capacitance A is same with the capacitance B. Micro-capacitance is formed by round or square copper sheets which are formed by covering copper with identical electric performance with a ground wire, wherein the capacitance A is a measuring capacitance, a copper sheet area of the capacitance A is generally touched by the human body (or fingers), and the capacitance B is a capacitance and has the similar electric capacity with the capacitance A, and the capacitance B is called a standard and provides a judgment benchmark for a measuring value of the capacitance A. The fingers or one part of the human body contacting or being close to the capacitance A can be judged or not.

Description

technical field [0001] The invention relates to a method for detecting microcapacitance of a human body, belonging to the field of microcapacitance detection. Background technique [0002] Due to the extremely small capacitance of human body microcapacitance, when it forms a touch circuit with the wiring capacitance on the circuit board, if the contact area is small, it is extremely difficult to detect. In the past, the human body capacitive touch detection required the touch area to be large enough to make a judgment , otherwise it will be extremely difficult and easily cause misjudgment, and it will also be affected by ambient temperature and temperature, so its use is very limited. Contents of the invention [0003] The invention relates to a detection method of human body microcapacitance, which can accurately judge the tiny contact capacitance of the human body and avoid the influence of ambient temperature and temperature on it. [0004] In order to achieve the abov...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01R27/26
Inventor 淡博李金录
Owner HARBIN ZHIMU TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com