Mechanical type electric energy meter voltage display circuit
A voltage display circuit and display circuit technology, applied in the direction of measuring current/voltage, measuring only voltage, measuring electrical variables, etc., to prolong the service life and achieve the effect of frequency adaptation
Pending Publication Date: 2016-11-16
CHONGQING HUAHONG INSTR
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Problems solved by technology
The mechanical electric energy meter (also known as the induction electric energy meter) does not have the function of displaying the measured value of the power grid, but the market has a demand for displaying the measured value, and an electronic display circuit device needs to be added.
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Embodiment Construction
[0022] The specific implementation manner and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0023] Such as figure 1 As shown, a mechanical watt-hour meter voltage display circuit includes a signal processing circuit, a voltage sampling circuit and a frequency sampling circuit are respectively connected to the signal input end group of the signal processing circuit, and a signal output end of the signal processing circuit A display circuit is connected, the voltage sampling circuit is used to obtain the voltage signal from the electric energy meter sampling circuit, the frequency sampling circuit is used to obtain the circuit frequency signal from the electric energy meter sampling circuit, and the signal processing circuit is used to obtain the voltage signal and frequency signal, the display circuit is used to realize the normal display of the voltage value of the power grid where the elec...
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The invention discloses a mechanical type electric energy meter voltage display circuit which comprises a signal processing circuit. The signal input end group of the processing circuit is connected to a voltage sampling circuit and a frequency sampling circuit, and the signal output end of the signal processing circuit is connected to a display circuit. The voltage sampling circuit is used for obtaining a voltage signal from an electric energy meter sampling circuit. The frequency sampling circuit is used for obtaining a circuit frequency signal from the electric energy meter sampling circuit. The signal processing circuit is used for processing the obtained voltage signal and frequency signal. The display circuit is used for realizing the normal display of the voltage value of a grid where an electric energy meter is located. The mechanical type electric energy meter voltage display circuit has the advantages that through sampling and displaying the voltage signal of the grid where an electric energy meter is located, a voltage sampling frequency is corrected through sampling grid frequency, thus the high precision guarantee of the voltage value in a wide frequency range is realized, the funciton of frequency adaption is realized, and the service life of an LED digital tube is prolonged by using an infrared wake-up function.
Description
technical field [0001] The invention relates to the technical field of power system electric energy metering equipment, in particular to a voltage display circuit of a mechanical electric energy meter. Background technique [0002] At present, a large number of electric energy meters installed on site are mechanical electric energy meters and a small amount of pulse electric energy meters. The mechanical energy meter (also known as the induction energy meter) does not have the function of displaying the measured value of the power grid, but the market has a demand for displaying the measured value, and an electronic display circuit device needs to be added. Therefore, how to improve the range of measured values, the accuracy of measured values, prolong the life of LED digital tubes, and reduce the cost of products are the goals of many electric energy meter manufacturers. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the object of the pre...
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Login to View More IPC IPC(8): G01R11/02G01R19/00
CPCG01R11/02G01R19/0084
Inventor 李小国朱礁周杰
Owner CHONGQING HUAHONG INSTR