Signal processing method by adopting public processing circuit during collection of alternating-current voltage and current

An AC voltage and circuit processing technology, applied in the field of signal processing, can solve the problems of requiring a large number of components to measure and have large limitations, and achieve the effect of reducing the number of circuits and components, saving circuit costs, and reducing the area of ​​​​the circuit board

Inactive Publication Date: 2012-07-18
西安爱邦电子系统有限公司
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Problems solved by technology

[0006] The present invention provides a signal processing method using a common processing circuit when collecting AC voltage and current, which mainly solves the problem that di

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  • Signal processing method by adopting public processing circuit during collection of alternating-current voltage and current
  • Signal processing method by adopting public processing circuit during collection of alternating-current voltage and current
  • Signal processing method by adopting public processing circuit during collection of alternating-current voltage and current

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[0026] In order to enable the AC voltage and current to share the same signal processing channel, the present invention provides a signal processing and switching method, which is specifically described as follows:

[0027] The signal processing method using a common processing circuit when collecting AC voltage and current includes the following steps:

[0028] 1] Transform the measured voltages into weak voltage signals through the signal conversion circuit, and input the signals to step 3 for processing after the conversion is completed;

[0029] If you want to use the same signal processing circuit to process AC voltage and current signals, you need to first convert the measured voltage and current signals into the same type of signal, and the ranges are consistent. For this reason, for the measured AC voltage signal, it is transformed into a proportional weak voltage signal through a signal conversion circuit. The signal conversion circuit can be realized by means of voltage tr...

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Abstract

The invention provides a signal processing method by adopting a public processing circuit during collection of alternating-current voltage and current, which mainly solves the problem that when alternating-current voltage and current are collected in the prior art, different signal processing channels are adopted, a large number of elements are needed for performing measurement, and limitation is large. The signal processing method by adopting the public processing circuit during the collection of the alternating-current voltage and the current includes the following steps: 1] converting signals of voltage and current to be measured into current signals with a consistent range, and inputting the signal into a step 2 to be processed after conversion is finished; 2] sampling the current signals processed in the step 1, and converting the current signals processed in the step 1 into proportional voltage signals after sampling is finished. The signal processing method greatly saves circuit cost, reduces area of a circuit board, and multiplies flexibility of channel input amount.

Description

technical field [0001] The invention relates to a signal processing method, in particular to a signal processing method using a common processing circuit when collecting AC voltage and current. Background technique [0002] When collecting AC voltage and current, it is generally necessary to transform the measured voltage and current signals into relatively weak signals through transformers, and then perform conventional processing such as filtering and amplification through analog signal processing circuits, and then enter the dedicated power parameter acquisition chip. Or A / D converter, and finally perform calculation, processing and display in the CPU. [0003] When collecting AC voltage and current, the conventional method is to use different signal processing channels, that is, the voltage and current are processed by different circuits, so that the circuit debugging is relatively simple, but there are the following defects: [0004] 1. The voltage and current processi...

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Application Information

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IPC IPC(8): G01R19/25
Inventor 穆明建
Owner 西安爱邦电子系统有限公司
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