Alternating-current 220V input signal acquisition circuit

A technology of signal acquisition and binary input, applied in the direction of using AC to DC for measurement, etc., can solve problems such as increasing system complexity and instability, and achieve the effects of reducing state quantity conversion devices, saving costs, and optimizing the system

Inactive Publication Date: 2013-05-01
SHANGHAI HUAJIAN ELECTRICAL EQUIP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] There is an AC 220V binary input in the industrial site, and the acquisition device is generally DC 24V, which requires the addition of an isolation conversion device, which increases the complexity of the system and also brings instability.

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  • Alternating-current 220V input signal acquisition circuit

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with accompanying drawing:

[0010] See attached figure 1 , The schematic diagram of the AC 220V binary input acquisition circuit has marked the model of each component. The components purchased in the market can be connected according to the schematic diagram to realize the function of AC 220V binary input acquisition. One end of the AC 220V binary input signal is connected to the half-wave The rectifier module is connected, the half-wave rectifier module is connected with the voltage divider filter module, the voltage divider filter module is connected with one end of the input of the photoelectric isolation module, and the other end of the input of the photoelectric isolation module is connected with the protection module, and the protection module is connected with the AC 220V binary input signal separately. One end is connected, one end of the output end of the photoelectric isolation module is gr...

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Abstract

The invention discloses an alternating-current 220V input signal acquisition circuit. The alternating-current 220V input signal acquisition circuit is characterized in that one end of an alternating-current 220V input signal is connected with a semiwave rectifying module which is connected with a voltage-distributing filtering module; the voltage-distributing filtering module is connected with one end of the input of a photoelectric isolating module, and the other end of the input of the photoelectric isolating module is connected with a protection module; the protection module is connected with the other end of the alternating-current 220V input signal; one end of the output end of the photoelectric isolating module is grounded, and the other end of the output end of the photoelectric isolating module is connected with a pull-up resistor and then is connected with an IO pin of an acquired MCU (Micro Controller Unit) so as to realize the circuit for directly isolating and acquiring the 220V input signal. Compared with the prior art, the alternating-current 220V input signal acquisition circuit disclosed by the invention has the advantages that any MCU can realize safe and reliable acquisition of the alternating-current 220V input by the circuit; and the middle state-quantity conversion device is reduced, the system is optimized, the system security is improved, the cost is saved and the safe operation is effectively ensured.

Description

technical field [0001] The invention relates to an AC 220V binary input signal acquisition circuit, which relates to the technical field of binary input acquisition, in particular to the technical field of AC 220V binary input acquisition. Background technique [0002] There is an AC 220V binary input in the industrial site, and the acquisition device is generally DC 24V, which requires the addition of an isolation conversion device, which increases the complexity of the system and also brings instability. Contents of the invention [0003] The purpose of the present invention is to design a circuit for directly isolating and collecting AC 220V binary input signals in order to overcome the deficiency that the AC 220V binary input model needs to increase the isolation transformation to collect them. The technical solution it adopts is: a structure including an active AC 220V binary input signal, a half-wave rectification module, a voltage divider filter module, a photoelect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/22
Inventor 王晓辉戴顺辉施红雷
Owner SHANGHAI HUAJIAN ELECTRICAL EQUIP
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