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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 of damaged circuits or components, terminals that cannot correctly collect electric energy meter pulses, and wrong connections.

Inactive Publication Date: 2013-09-11
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
[0007] 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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Embodiment 1

[0026] Such as figure 1 As shown, a pulse signal acquisition circuit of the present invention, the pulse acquisition circuit includes an input pulse signal and an output pulse signal, and 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 provided 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 and 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.

[0027] In this embodiment, the overvoltage protection circuit includes a reverse diode D1 disposed between the input pulse signal M and the optocoupler, and a reverse diode D2 disposed between the input pulse signal E and the optocoupler. The cathode of the reverse diode D1 is co...

Embodiment 2

[0031] Such as figure 2 As shown, the difference between this embodiment and the above-mentioned 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 power supply VCC.

[0032] By setting the pulse shaping circuit, the pulse input signal is shaped and then output to the pulse signal acquisition device, 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 optocoupler is used for shaping, so that the input pulse signal and the output pulse signal are completely isolated while the shaping conversion is completed, that is, the energy meters are isolated, and the high-voltage signal at the end of the energy meter is avoided. Pulse signal acquisition The device forms a voltage shoc...

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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

[0001] technical field [0002] The invention relates to the field of calibration of multifunctional electric energy meters, in particular to a pulse signal acquisition circuit, which is applied to a multifunctional pulse signal error calculation device. [0003] Background technique [0004] The pulse signal output mode of the existing electric energy meter is diverse, and the different output modes must be converted separately before they can be connected to the main circuit for easy identification. The output mode of the pulse signal of the electric energy meter can be divided into two categories: active output and passive output. [0005] The active output mode does not require the terminal to provide power, the amplitude of the pulse signal voltage source is 3-15 V, the pulse width is 80: 20ms, and 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...

Claims

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Application Information

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Patent Type & Authority Applications(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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