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High-precision PWM signal generation and detection system based on edge control

A technology of PWM signal and detection system, which is applied in the field of ARM, logic control and signal acquisition, and can solve the problem that the duty cycle and high and low level voltage PWM signals cannot be generated at the same time

Inactive Publication Date: 2020-05-15
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, there are few systems that realize the generation and detection of wide-band PWM signals, that is, they cannot simultaneously generate and detect PWM signals with adjustable frequency, duty cycle, and high and low level voltages.

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  • High-precision PWM signal generation and detection system based on edge control
  • High-precision PWM signal generation and detection system based on edge control

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Embodiment Construction

[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0031] In describing the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element...

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Abstract

The invention discloses a high-precision PWM signal generation and detection system based on edge control. The system comprises an ARM processor, a digital-to-analog conversion chip, an operational amplifier, a first divider resistor, a comparator and a sampling holder. The ARM processor comprises a timer; PWM signals are generated through the ARM processor. The frequency of the PWM signal is controlled by the timer in a cascading manner; the PWM signal output voltage is controlled through the analog-to-digital conversion chip; the operational amplifier is used for amplifying the output voltage; meanwhile, the first divider resistor is used for carrying out 1 / 2 voltage division on the PWM signal; duty ratio and frequency detection is carried out on the PWM signal by using a rising edge anda falling edge through the comparator; the sampling holder is used for detecting high and low level voltages of the PWM signal and transmitting the high and low level voltages to the ARM processor, and the PWM signal with adjustable detection frequency, duty ratio and high and low level voltages can be generated at the same time.

Description

technical field [0001] The invention relates to the technical fields of ARM, logic control and signal acquisition, in particular to a high-precision PWM signal generation and detection system based on edge control. Background technique [0002] Pulse Width Modulation (PWM) is a very effective technique for controlling analog circuits using the digital output of a microprocessor. With the development of electronic technology, PWM technology is widely used in the fields of power electronics, measurement, detection and communication. Therefore, designing a PWM signal generation and detection system with high integration and small signal error still has high practical application value. In the single-chip microcomputer integrated system, there are many existing PWM signal generation systems, and more systems are designed to generate or detect PWM signals with fixed frequency, duty cycle, and high and low voltage levels. At the same time, there are few systems that realize the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
CPCG05B19/042
Inventor 牛军浩骆薇羽王文胜苏金操展翔许川佩朱爱军
Owner GUILIN UNIV OF ELECTRONIC TECH
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