Proximity switch with fault detection function

A proximity switch, fault detection technology, applied in electronic switches, circuit breaker testing, electrical components and other directions, can solve problems such as circuit breakdown, proximity switches have no fault detection function, etc.

Active Publication Date: 2013-12-04
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is aimed at the problem that the proximity switch in the prior art has no fault detection function and is easily broken down by various factors in the circuit. It provides a simple structure, low cost, and can realize fault detection. Proximity switch with detection function

Method used

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  • Proximity switch with fault detection function
  • Proximity switch with fault detection function
  • Proximity switch with fault detection function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] figure 1 It is a circuit diagram of a proximity switch in the prior art. It can be seen that it is mainly composed of an amplifying oscillation circuit 1, an amplitude detection circuit 2, a switch signal output circuit 3 and a switch housing 4 located outside it.

[0016] figure 2 It is a circuit diagram of the proximity switch of the present invention, in which a fault detection circuit 6 is added. The fault detection circuit includes an amplification oscillation circuit 1, an amplitude detection circuit 2 and a switch signal output circuit 3, and an AND gate logic circuit is arranged between the amplitude detection circuit and the switch signal output circuit.

[0017] Increased fault detection circuit The detection circuit is almost the same as the conventional signal circuit of the proximity switch. The circuit is also divided into three parts: the oscillator, the amplitude processing circuit composed of multi-stage amplifier signals and the switch signal output ...

Embodiment 2

[0020] Embodiment 2: The proximity switch controls the running of the trolley.

[0021] In the process of the proximity switch controlling the action of the field equipment, by approaching the relevant sensing device on the controlled equipment, no direct contact is required, and only after the proximity switch sensing distance is reached, the proximity switch provides a non-contact switching value to control The health of the controlled device.

[0022] see image 3 , indicating that the trolley 9 runs along the track. When it reaches the proximity switch 7, it stops for a while to let the bucket 10 unload. After the delay time is up, it runs in the direction of the proximity switch 8. When it reaches the proximity switch 11 unloading, then continue to run to the direction of proximity switch 7, reciprocating cycle.

[0023] Combined with the control circuit below Figure 4 For analysis, 7.1 in the figure represents the contact output of the fault diagnosis circuit of the ...

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PUM

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Abstract

The invention relates to a proximity switch with the fault detection function. The proximity switch with the fault detection function mainly comprises an oscillator, an amplitude detection circuit, a switch signal output circuit and a switch outer shell arranged outside the proximity switch. The proximity switch with the fault detection function is characterized by further comprising a fault detection circuit. The fault detection circuit comprises an amplification oscillating circuit, the amplitude detection circuit and the switch signal output circuit, wherein an AND gate logic circuit is arranged between the amplitude detection circuit and the switch signal output circuit. The fault detection circuit can achieve the fault detection function, reduce influence of other factors to the circuits, have timely control over equipment faults, avoid occurrence of the equipment faults, and further ensure safety of production.

Description

technical field [0001] The invention relates to a proximity switch, in particular to a proximity switch with a fault detection function, and belongs to the technical field of electric control. Background technique [0002] Proximity switch, also known as contactless proximity switch, is an ideal electronic switch sensor. At present, the common proximity switches on the market are as follows: 1. Passive proximity switches, which do not require a power supply, and control the closed state of the switch through magnetic induction; 2. Eddy current proximity switches, which are sometimes called inductive switches. Proximity switch, which uses a conductive object to generate an eddy current inside the object when it is close to the proximity switch that can generate an electromagnetic field. 3. Capacitive proximity switch, the measurement of this switch is usually one plate that constitutes the capacitor, and the other plate is the shell of the switch. 4. Hall proximity switch, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/945G01R31/327
Inventor 吉明鹏季益龙林红
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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