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AC voltage measuring circuit, measuring method and intelligent device

An AC voltage, measuring circuit technology, applied in the direction of measuring electrical variables, measuring current/voltage, voltage/current isolation, etc., can solve problems such as high cost, complex processing process, and inexpensive transformers

Pending Publication Date: 2022-08-05
佛山市顺德区锜科电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, practice has found that the first type is not cheap because the transformer itself is not cheap, and the digital processing of the AC signal needs to increase the digital processing circuit and the processing flow is complicated; The second type is due to the addition of a step-down voltage regulator circuit for measuring chip power supply and an optocoupler isolation circuit for telling the measurement result to the main control chip
It can be seen that the cost of both the first type of measurement scheme and the second type of measurement scheme is relatively high

Method used

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  • AC voltage measuring circuit, measuring method and intelligent device
  • AC voltage measuring circuit, measuring method and intelligent device

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Embodiment 1

[0060] see figure 1 , figure 1 It is a schematic structural diagram of an AC voltage measurement circuit disclosed in an embodiment of the present invention. like figure 1 As shown, the AC voltage measurement circuit includes an optocoupler circuit and a voltage comparison circuit, wherein the optocoupler circuit includes an optocoupler primary circuit and an optocoupler secondary circuit;

[0061] The output end of the voltage comparison circuit is electrically connected to the input end of the optocoupler primary circuit; the output end of the optocoupler primary circuit is inductively connected to the input end of the optocoupler secondary circuit, and the output end of the optocoupler secondary circuit is used for electrical connection controller; the input end of the voltage comparison circuit is used to electrically connect the external AC power supply; the voltage comparison circuit is used to provide a reference voltage for measuring the AC voltage of the external AC...

Embodiment 2

[0078] see Figure 5 shown, Figure 5 It is a schematic flowchart of an AC voltage measurement method disclosed in an embodiment of the present invention, wherein the measurement method is applied to a measurement circuit for measuring AC voltage, wherein the measurement circuit includes an optocoupler circuit and a voltage comparison circuit, wherein the optical The coupling circuit includes an optocoupler primary circuit and an optocoupler secondary circuit. like Figure 5 As shown, the method for measuring the AC voltage may include the following steps:

[0079] 101. The voltage comparison circuit obtains the AC voltage of the external AC power supply, and controls the on-off of the primary circuit of the optocoupler according to the obtained AC voltage of the external AC power supply and the preset reference voltage, and the preset reference voltage is used to measure the external AC power supply AC voltage of the power supply.

[0080] 102. Under the control of the vo...

Embodiment 3

[0094] An intelligent device disclosed in an embodiment of the present invention, Image 6 A schematic structural diagram of a smart device is disclosed, the smart device is a device that needs to measure AC voltage and the smart device includes the AC voltage measurement circuit according to the first embodiment. It should be noted that, for the detailed description of the AC voltage measurement circuit, please refer to the specific description of the relevant content of the first embodiment, and details are not repeated in this embodiment.

[0095] visible, implement Image 6 The described smart device only sets the voltage comparison circuit before the optocoupler circuit, so that the AC voltage of the external power supply controls the on-off of the optocoupler circuit under the control of the preset reference voltage of the voltage comparison circuit, and the level signal is adjusted. Output to the controller, and the controller determines the duration of the optocoupler...

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PUM

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Abstract

The invention discloses an alternating voltage measuring circuit, a measuring method and intelligent equipment, and the circuit is only provided with a voltage comparison circuit in front of an optical coupling circuit, so that the alternating voltage of an external power supply controls the on-off of the optical coupling circuit under the control of a preset reference voltage of the voltage comparison circuit. The level signal is output to the controller, the controller determines the conduction duration of the optocoupler circuit according to the level signal, complex and expensive electronic components are not needed, and only simple circuit design is combined with the software logic principle of the controller, so that the conduction duration of the optocoupler circuit is determined. And the voltage value of the AC voltage of the external AC power supply can be quickly determined, so that the cost of measuring the voltage value of the AC voltage of the external AC power supply is reduced.

Description

technical field [0001] The invention relates to the technical field of AC voltage measurement, in particular to an AC voltage measurement circuit, a measurement method and an intelligent device. Background technique [0002] At present, the measurement scheme of AC voltage mainly includes two categories. The first category is: using a miniature transformer as the core component to directly convert the input high-voltage signal into a low-voltage signal, or through the primary series resistance of the transformer. First convert the input voltage into a small current signal, and then use a 1:1 transformer to convert, the converted current signal can be converted back to a voltage signal after being processed by a resistance circuit, and the AC signal output by the transformer is passed through an appropriate operational amplifier circuit. After processing, the analog-to-digital conversion ADC chip is sent for acquisition and conversion, and then the conversion result is sent t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R15/22
CPCG01R19/0084G01R15/22
Inventor 曾英华吴开洪王风云
Owner 佛山市顺德区锜科电子科技有限公司
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