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AC power failure detection method and apparatus, and communication device

A power failure detection, AC power technology, applied in the field of communication, can solve the problem of fast alarm response and processing delay that cannot meet the AC power supply

Pending Publication Date: 2020-02-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention provides an AC power-down detection method, device, and communication equipment. The main technical problem to be solved is: to solve the existing processing delays in power-down alarm detection based on AC rectification and filtering processing, resulting in failure to meet the requirements of the AC power supply. Requirements for Fast Alarm Response During Power Loss

Method used

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  • AC power failure detection method and apparatus, and communication device
  • AC power failure detection method and apparatus, and communication device
  • AC power failure detection method and apparatus, and communication device

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Embodiment 1

[0033] Aiming at the problem that there is a processing delay in the existing power-off alarm detection based on AC rectification and filtering processing, which cannot meet the problem of rapid alarm response when the AC power is powered off, this embodiment provides an AC power-off detection scheme. The sine wave is converted into a source square wave, and the source square wave is used as an excitation to generate a reference square wave. The generated reference square wave and the source square wave meet the requirements. The result obtained from the logical operation processing is to indicate that no power-off alarm is performed, and during the AC power failure period, the result obtained by performing logical operation processing according to the source square wave and the reference square wave is to indicate that a power-down alarm is performed; that is, the source in this embodiment The specific conversion rules of the square wave and the reference square wave generatio...

Embodiment 2

[0065] For ease of understanding, this implementation will be further described below by taking an AC detection circuit implementing an AC power failure detection device as an example.

[0066] see Figure 6 As shown, the AC detection circuit provided in this embodiment includes a waveform conversion circuit 601 (that is, an example of a waveform conversion module), a reference waveform generation circuit 602 (that is, an example of a reference waveform generation module), and a logic calculation circuit 603 And an optical coupling output circuit 604 (that is, an example of a logic control module);

[0067] The waveform conversion circuit 601 is connected to the phase line terminal AC_L and the neutral line terminal AC_N of the AC power supply, and converts the AC strong current AC sine wave into a weak current square wave signal CP (ie, the source square wave). The implementation manner of the waveform conversion circuit 601 in this embodiment can be flexibly set. For examp...

Embodiment 3

[0084] In order to avoid that the AC power already exists when the communication equipment system is powered on, the state of the source square wave converted by the waveform conversion module after power-on is uncertain, resulting in the inability to accurately detect the AC power and false alarms, the initialization waveform generation module is in the system The initialization waveform is generated when the power is turned on, and the initialization waveform generates a low-level waveform during the preset initialization period, and generates a high level after the initialization period; after the logic control module performs logic operations on the source square wave and the reference square wave, according to the logic Before determining whether to perform a power-down alarm based on the result of the calculation and processing, perform logical AND operation processing on the result of the logic operation and the initialization waveform to obtain the final result of the lo...

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Abstract

The embodiment of the invention provides an AC power failure detection method and apparatus, and a communication device. The method comprises the steps of: converting an AC power supply sine wave intoa source square wave by a waveform conversion module, and respectively inputting the obtained source square wave into a reference waveform generation module and a logic control module; generating, bythe reference waveform generation module, a reference square wave by using the source square wave as stimulus, and inputting the generated reference square wave into the logic control module; and performing, by the logic control module, logic operation processing on the source square wave and the reference square wave, and determining whether to perform power failure alarm according to the operation result. In the AC power failure detection method provided by the embodiment of the invention, conversion and parallel operation are performed based on the waveform of an AC power supply to detectthe power failure, so no rectification and filtering processing needs to be performed on the AC, as a result, the delay caused by the rectification and filtering processing on the AC can be avoided, and the alarm response speed in the case of AC power failure is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an AC power failure detection method, device and communication equipment. Background technique [0002] In recent years, the communication industry has developed rapidly. As a key supporting facility for communication equipment, the reliability of the communication power supply is crucial to the normal operation of the communication equipment. When the mains fails, the communication power supply needs to be able to respond in time (ms level). Or switch the power supply and other measures. However, the AC power alarm schemes in the existing communication equipment are all based on the sampling technology to perform sampling detection and output corresponding detection signals after the AC power is rectified, filtered and so on. The existing schemes have delays in AC rectification and filtering, and the existing schemes can only respond to one cycle or half a cycle ...

Claims

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Application Information

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IPC IPC(8): G01R19/155G01R19/165
CPCG01R19/16547G01R19/16576G01R19/155
Inventor 李凯李林杨锐曹捷王松
Owner ZTE CORP
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