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A pulse signal acquisition circuit

A pulse signal and acquisition circuit technology, which is applied in the direction of logic circuit connection/interface layout, etc., can solve the problems that the terminal cannot correctly collect the pulse of the electric energy meter, is not compatible, and damages the circuit or components.

Inactive Publication Date: 2016-06-08
南京电力自动化设备三厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two are not compatible and must not be wrongly connected, otherwise the circuit or components will be damaged
The two are not compatible
[0005] In the prior art, when there are multiple inputs, the passive positive pulse common cathode connection and the passive negative pulse common anode connection will cause the terminal to fail to collect the energy meter pulse correctly

Method used

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  • A pulse signal acquisition circuit
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Embodiment 1

[0021] Such as figure 1 As shown, a pulse signal acquisition circuit of the present invention includes an input pulse signal and an output pulse signal. The input pulse signal is shaped into an output pulse signal by a pulse shaping circuit, wherein the input pulse signal and the pulse An overvoltage protection circuit is arranged between the shaping circuits. In this embodiment, the pulse shaping circuit includes an optocoupler U1, the input pulse signal includes an input pulse signal M, an input pulse signal E, the input pulse signal M is connected to the anode of the optocoupler U1, and the input pulse signal E is connected to the cathode of optocoupler U1.

[0022] In this embodiment, the overvoltage protection circuit includes a reverse diode D1 arranged between the input pulse signal M and the optocoupler, and a reverse diode D2 arranged between the input pulse signal E and the optocoupler. The cathode of the reverse diode D1 is connected to the input pulse signal M, the a...

Embodiment 2

[0026] Such as figure 2 As shown, the difference between this embodiment and the foregoing embodiment 1 is that the emitter of the optocoupler U1 is connected to the output pulse signal MC, the emitter of the optocoupler U1 is provided with a pull-down resistor R4, and the optocoupler U1 The emitter is electrically connected to the weak current power supply VCC.

[0027] By setting the pulse shaping circuit, the pulse input signal is shaped and then output to the pulse signal acquisition device again, so that the pulse signal acquisition device can accurately and effectively complete the pulse signal detection of the electric energy meter. At the same time, the optical coupler is used for shaping, so that the input pulse signal and the output pulse signal are isolated between the two at the same time as the shaping conversion is completed, that is, the isolation between the electric energy meters, avoiding the high-voltage signal at the electric energy meter terminal to collect ...

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Abstract

The invention discloses a pulse signal acquisition circuit which is practical, safe and reliable. The pulse signal acquisition circuit comprises an input pulse signal and an output pulse signal, wherein the input pulse signal can be converted into the output pulse signal through shaping of a pulse shaping circuit, and an overvoltage protection circuit is arranged between the input signal and the pulse shaping circuit. The overvoltage protection circuit arranged between the input pulse signal and the pulse shaping circuit enables the whole circuit to be safe and reliable.

Description

Technical field [0001] The invention relates to the field of multifunctional electric energy meter calibration, in particular to a pulse signal acquisition circuit, which is applied to a multifunctional pulse signal error calculation device. Background technique [0002] The pulse signal output modes of the existing electric energy meters are diversified, and different output modes must be converted separately before they can be connected to the main circuit to facilitate identification. The pulse signal output mode of the electric energy meter can be divided into two categories: active output and passive output. [0003] The active output mode does not need the terminal to provide power, the pulse signal voltage source amplitude is 3-15V, the pulse width is 80:20ms, the electric energy meter and the terminal have an electrical common point; the passive output mode requires the terminal to provide power, and the electric energy meter and the terminal pass light. Coupling isolation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/0175
Inventor 金华峰赵亮覃述银
Owner 南京电力自动化设备三厂有限公司
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