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

eTPU-based synchronous sampling and frequency measuring device for alternating-current signals and working method thereof

A technology for measuring AC signals and frequencies, applied to frequency measuring devices, etc., can solve the problems of low measurement accuracy and real-time performance, and achieve the effects of ensuring continuity and integrity, reducing load, and ensuring reliability

Active Publication Date: 2011-07-06
TIANJIN KEYVIA ELECTRIC CO LTD
View PDF5 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above method, the accuracy of the frequency measurement and synchronous sampling of the AC signal is limited by the timer accuracy of the microcontroller, and requires strict software and hardware to work together, so the measurement accuracy and real-time performance are not high

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
  • eTPU-based synchronous sampling and frequency measuring device for alternating-current signals and working method thereof
  • eTPU-based synchronous sampling and frequency measuring device for alternating-current signals and working method thereof
  • eTPU-based synchronous sampling and frequency measuring device for alternating-current signals and working method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0030] Embodiment: a kind of AC signal synchronous sampling and frequency measurement device based on eTPU (see figure 1 ), is characterized in that it comprises microcontroller unit, AC sine wave / square wave conversion module, AD conversion module, low-pass filter unit and voltage reference unit; Wherein, the input terminal of said microcontroller unit is connected with AC sine wave The input end of the / square wave conversion module is connected with the input end of the AD conversion module, and its output end is connected with the output end of the AD conversion module; the input end of the said AC sine wave / square wave conversion module is connected with the output end of the low-pass filter unit connection; the input terminal of the AD conversion module collects the voltage signal of the voltage reference unit; the input terminal of the low-pass filter unit collects the AC signal analog quantity.

[0031] The AD conversion module mentioned above is composed of two AD7656...

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 an eTPU-based synchronous sampling and frequency measuring device for alternating-current signals, comprising a microcontroller unit, an alternating-current sine wave / square wave conversion module, an AD (Analog-to-Digital) conversion module, a low-pass filtering unit and a voltage reference unit. The working method of the device comprises the steps of: initializing the functions of an eTPU module; setting a channel 1 of the module as an input capturing mode of GPIO (General Purpose Input / Output) function; setting a channel 2 of the module as a PWM (Pulse Width Modulation) output mode and starting the sampling; acquiring the alternating-current voltage signals needing frequency measurement, carrying out waveform conversion on the signals and sending the converted square wave signals to the channel 1 of the eTPU module; finishing the sampling conversion by a chip in the AD conversion module; capturing the square wave signals by the channel 1 of the eTPU module and computing the frequency values of the signals; adjusting the PWM period value of the channel 2 of the eTPU module; taking an intermediate value as the current actual measurement frequency; and monitoring the frequency measurement function. The device is a system which is good in instantaneity, high in precision, small in resource consumption and convenient to be realized in embedded systems; and the working method of the device is simple and easy to operate.

Description

(1) Technical field: [0001] The invention belongs to the fields of electrified railway traction automation and power system substation automation, in particular an eTPU (enhanced time sequence processing unit—enhanced Time ProcessorUnit)-based automatic synchronous sampling and frequency measurement method for AC signals. (two) background technology: [0002] In the electrified railway traction automation system and the power system substation integrated automation system, in order to realize the normal control and monitoring of related power equipment, it is necessary to accurately measure various AC voltage and current signals, and when the frequency of the above signals changes, it can be Adjust the sampling frequency in real time to realize the automatic synchronous sampling of the above signals. [0003] For the automatic synchronous sampling and frequency measurement of AC signals, the general method is: first convert the AC signal into a square wave signal, use the ti...

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): G01R23/02
Inventor 曾庆钊李政张志刚赵宪文闫兆辉
Owner TIANJIN KEYVIA ELECTRIC CO LTD
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com