Relay fault detection circuit and fault detection method thereof

A technology for relay failure and circuit detection, applied in circuit breaker testing, instruments, measuring electricity, etc., can solve problems such as load flicker, and achieve the effect of improving accuracy

Inactive Publication Date: 2016-03-23
ZHEJIANG SUPCON INSTR
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] In view of the problems existing in the above-mentioned prior art, the present invention proposes a relay fault detection circuit and its fault detection method. The voltage on both sides of the rela

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  • Relay fault detection circuit and fault detection method thereof
  • Relay fault detection circuit and fault detection method thereof
  • Relay fault detection circuit and fault detection method thereof

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[0031] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation manner and a specific operation process, but the protection scope of the present invention is not limited to the following implementation. example.

[0032] combine Figure 1-Figure 2 , the relay fault detection circuit of the present invention is described in detail, such as figure 1 As shown, it includes: a relay 1, an optocoupler 2, a switch 3 and a signal control unit 4, the relay 1 includes: two output terminals and a control terminal, the relay 1 is used to control the opening and closing of the load; the optocoupler 2 It is used to collect the voltage between the two output terminals of the relay 1, and then output the signal to the signal control unit; the switch 3 is connected between one of the output terminals of the relay 1 and the optocoupler 2, and i...

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Abstract

The present invention discloses a relay fault detection circuit and a fault detection method thereof. The circuit comprises a relay, an optocoupler, a switching switch and a signal control unit, wherein the optocoupler is used for detecting the voltage between the two output ends of the relay, the switching switch is connected between one output end of the relay and the optocoupler, and the control end of the relay, the control end of the switching switch and the output end of the optocoupler are connected to the signal control unit. The method comprises the following steps that: the signal control unit controls a switching switch, thus controls the optocoupler to collect the voltage between the two output ends of the relay periodically, and generates an output signal; and whether the relay is failed or not is judged according to the switch state of the relay and the output signal. According to the relay fault detection circuit and the fault detection method, through controlling the switching switch to collect the voltage between the two output ends of the relay periodically, a detection time is short, and the problem of load flicker is solved.

Description

technical field [0001] The invention relates to the field of fault detection, in particular to a relay fault detection circuit and a fault detection method thereof. Background technique [0002] Relays are usually used to provide signal switching. With the continuous development of society, there are more and more high-rise buildings. Relays are used to control the motors of various lamps in the building. Due to the variety of equipment on the construction site, the structure is very Complicated, there are resistive loads, such as incandescent lamps; capacitive loads, such as fluorescent lamps; inductive loads, such as motors; the power of equipment is also different, ranging from a few watts to several kilowatts. The relay needs to control and drive these different devices. Since the power supply of the devices used on site is 220V AC mains, in the process of relay application, the opening and closing of the device will have a great impact on the relay, so the relay is like...

Claims

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/3278
Inventor 王凯蔡兴良俞利明徐安军
Owner ZHEJIANG SUPCON INSTR
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