A method and system for determining the charging and discharging frequency of a capacitor

A frequency determination, charge and discharge technology, applied in the field of capacitor charge and discharge frequency determination, capacitor charge and discharge frequency determination system, can solve the problems of inaccurate judgment, inaccurate capacitance sampling value, and affecting fundamental charge and discharge current, etc.

Active Publication Date: 2017-10-03
SHENZHEN CHIPSBANK TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the interference signal will be loaded on the capacitor charging and discharging waveform in the form of harmonics, which will affect the fundamental wave (capacitor charging and discharging waveform) charging and discharging current, and finally make the sampling value of the capacitor inaccurate when the capacitive touch button is used, and also It is impossible to accurately determine whether a finger is pressed on the capacitive touch button

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
  • A method and system for determining the charging and discharging frequency of a capacitor
  • A method and system for determining the charging and discharging frequency of a capacitor
  • A method and system for determining the charging and discharging frequency of a capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Please refer to figure 1 , figure 1 A process flow chart of a method for determining the frequency of capacitor charge and discharge provided by the present invention, the method includes:

[0045] Step s101: Obtain the voltage of the capacitor, and perform analog-to-digital conversion on the voltage to obtain a corresponding voltage digital quantity;

[0046] When the charging and discharging circuit charges and discharges the capacitor, the sensor collects the voltage of the capacitor in real time, and transmits the collected voltage to an analog-to-digital ADC (Analog-to-Digital Converter) converter, which performs analog-to-digital conversion on the voltage Finally, the corresponding voltage digital quantity is obtained and the voltage digital quantity is sent to the micro control unit MCU (MicroControl Unit).

[0047] Step s102: When the voltage digital quantity is greater than the trigger voltage digital quantity threshold, determine the maximum charge and disch...

Embodiment 2

[0059] Please refer to figure 2 , figure 2 The process flowchart of another method for determining the frequency of capacitor charging and discharging provided by the present invention, the method includes:

[0060] Step s201: obtain the voltage of the capacitor, and carry out analog-to-digital conversion to the voltage to obtain the corresponding voltage digital quantity;

[0061] Step s202: When the voltage digital quantity is greater than the trigger voltage digital quantity threshold, determine the maximum charge and discharge frequency of the capacitor;

[0062] In this embodiment, for example, it may be determined that the maximum charging and discharging frequency of the capacitor is 10 MHz.

[0063] Step s203: set the step size of the frequency increase, take the step size as the initial value, perform frequency iterative addition calculation according to the step size, and obtain N frequency values ​​not greater than the maximum charge and discharge frequency, whe...

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 discloses a method for determining the charging and discharging frequency of a capacitor, which includes acquiring the voltage of the capacitor and obtaining a corresponding voltage digital quantity; frequency value; respectively use N frequency values ​​as the charging and discharging frequency of the capacitor to charge and discharge N groups of capacitors multiple times in turn, and obtain M digital digital quantities of collected voltages corresponding to each of the N frequency values; Collect the digital value of the collected voltage and perform the difference calculation to obtain the difference of the digital value of the collected voltage; select the maximum difference of the digital value of the collected voltage in each group of the difference of the digital value of the collected voltage, and then select the N largest difference of the digital value of the collected voltage. The minimum value in the minimum value, the frequency value corresponding to the minimum value is selected as the charging and discharging frequency of the capacitor, which improves the anti-interference ability and stability of capacitive touch key products. The invention also discloses a capacitor charging and discharging frequency determination system.

Description

technical field [0001] The invention relates to the technical field of capacitor charging and discharging, in particular to a method for determining the charging and discharging frequency of a capacitor. The invention also relates to a system for determining the charging and discharging frequency of a capacitor. Background technique [0002] At present, capacitive touch buttons are used in many home appliances. The principle is that when a finger is close to the capacitive sensor module of the button chip, the sensor detects the capacitance value of the capacitor, and judges whether there is a finger pressing the button chip according to the change of the capacitance value. Capacitive sensor module. [0003] In a normal environment without electromagnetic interference, the capacitor is charged and discharged at an initial fixed frequency, and the voltage of the capacitor is collected in real time. When the external capacitance does not change, the collected voltage is V O ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 刘尚林
Owner SHENZHEN CHIPSBANK TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap