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

A large-range AC signal zero-crossing detection method and device

An AC signal, zero-crossing detection technology, applied in the field of electronics, to achieve the effect of high precision and wide practical value

Active Publication Date: 2018-03-02
重庆恒锐金鼎感应科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of circuit can often only be used in applications that do not require high precision.

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 large-range AC signal zero-crossing detection method and device
  • A large-range AC signal zero-crossing detection method and device
  • A large-range AC signal zero-crossing detection method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0048] A method for identifying a zero-crossing point of a rectangular wave signal provided by the present invention specifically includes the following steps:

[0049] Step 1) rectifying the input AC detection signal to convert the AC signal into a DC signal, which is convenient for detection.

[0050] Step 2) The output signal of the transformation unit is processed by the transformation unit. When the input signal of the transformation unit is smaller than the set value, the output signal of the transformation unit follows the input signal. When the input signal of the transformation unit is greater than the set value, the output signal of the transformation unit is equal to Set value; during current type detection, the conversion unit is used to ensure that the actual output current value I≤I out , when the voltage type is detected, th...

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 wide-range alternating current signal zero-cross detection method and device and belongs to the technical field of electronics. The wide-range alternating current signal zero-cross detection device comprises a rectification unit, a conversion unit, an amplification unit, a comparison unit and an output unit. For current type detection and voltage type detection, different conversion units and amplification units are designed. The conversion unit designed by the invention is used for achieving wide-range voltage zero-cross detection. According to the invention, no step-down circuit or voltage stabilization amplitude limiting circuit is adopted, direct processing of high voltage signals is conducted, influences of background noise or voltage thresholds on detection precision are reduced, zero-cross detection of large signals and small signals can be achieved at the same time, the precision is high, and wide practical value is achieved.

Description

technical field [0001] The invention belongs to the field of electronic technology, and relates to a method and device for detecting zero-crossing of a large-range AC signal. Background technique [0002] Zero-crossing detection refers to the detection of the positive and negative half-cycle transition moments of the AC signal. In practical applications, the amplitude range of the input signal processed in the detection circuit is within a relatively small range, such as 1-5V, while the actual input signal has a large range of amplitude variation. Signals with small amplitudes need to be amplified first, and signals with large amplitudes need to be stepped down first. [0003] In practical applications, for example, when the system is started, the amplitude of the signal is relatively small (often in the microvolt level), but during normal operation, the amplitude of the signal is relatively large (up to hundreds of volts). For example, the start-up of the brushless DC mot...

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): G01R19/175
Inventor 程森林何强志王川靳双杨发如
Owner 重庆恒锐金鼎感应科技有限公司
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