Unlock instant, AI-driven research and patent intelligence for your innovation.

Tuned matching unit of square wave pulse output

A tuning and matching, square wave pulse technology, applied in the direction of pulse generation, pulse technology, electric pulse generation, etc., can solve the problem of insufficient driving ability, inability to input signal of car sensor coil, limited output voltage value of oscilloscope, and inability to test, etc. The effect of low cost, improved reliability and simple structure

Pending Publication Date: 2018-10-09
SHENYANG RAILWAY SIGNAL
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The XGZ type automatic over-phase separation control system host product needs to be tested before leaving the factory. One of the test indicators is the sensitivity test. It is necessary to input a DC square wave pulse voltage of 0~10v to the input terminal of the host's vehicle induction coil, and the pulse width ratio needs to be determined according to On-site adjustments are actually required. At the beginning, we used an oscilloscope for pulse width voltage input. However, due to the limited output voltage value of the oscilloscope, when the output voltage exceeds 10v, the driving capacity is insufficient to make the car induction coil generate an input signal, and the test cannot be performed. Later, it is carried out through PLC. Programming uses its own relay contact for input, but since the relay contact is a mechanical contact for a long time for pulse output, the service life is too short, so it is necessary to develop a tuning unit that can have sufficient driving capacity and can adjust the duty cycle according to demand

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
  • Tuned matching unit of square wave pulse output

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The whole tuning and matching unit consists of 555 timer chip, PNP transistor, photocoupler, matching resistor, matching capacitor, switching relay, light emitting diode and other components. The characteristic of the 555 timing chip itself is that the duty cycle of the output square wave signal can only be in the range of 50%~100%. We use a PNP diode to invert the output waveform and isolate it through an optocoupler, so that it can pass The output terminal of the optocoupler generates a stable square wave pulse with a duty ratio ranging from 0 to 50% that can be output between 0 and 30V. The tuning unit can meet the signal output of any duty cycle between 0 and 100% at different frequencies by setting the output range and adjusting the matching resistance and capacitance.

[0014] See attached figure 1 The pin 3 of the NE555 timing chip U1 is the output terminal of the pulse signal and is connected to the base pin 2 of the PNP transistor Q1 through the current-limiti...

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 provides a tuning matching unit of a square wave pulse output function, wherein the square wave pulse has full-duty ratio DC of 0-30v. A to be solved problem is that the driving capacityis insufficient when needing to output the DC voltage by using the pulse with fixed duty ratio; and any DC pulse voltage signal with DC 0-30v duty ration range of 0-100% can be output by using the features of the NPN and the PNP triodes and cooperating with the optocoupler, the pulse duty ratio and the frequency can be adjusted by adjusting the values of the matching resistance and the capacitance.

Description

technical field [0001] The invention relates to the field of circuit control, in particular to a square wave pulse output tuning and matching unit. Background technique [0002] The XGZ type automatic over-phase separation control system host product needs to be tested before leaving the factory. One of the test indicators is the sensitivity test. It is necessary to input a DC square wave pulse voltage of 0~10v to the input terminal of the host's vehicle induction coil, and the pulse width ratio needs to be determined according to On-site adjustments are actually required. At the beginning, we used an oscilloscope for pulse width voltage input. However, due to the limited output voltage value of the oscilloscope, when the output voltage exceeds 10v, the driving capacity is insufficient to make the car induction coil generate an input signal, and the test cannot be performed. Later, it is carried out through PLC. Programming uses its own relay contact for input, but since the...

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 Applications(China)
IPC IPC(8): H03K3/017H03K19/018
CPCH03K3/017H03K19/01825
Inventor 王鑫孙海东陈俊生王进忠吕树远吴晓男杨小溪刘军李楠赵兴海都丽娟裴喜春
Owner SHENYANG RAILWAY SIGNAL