Self-diagnosis device and method for line fault of landing leg of overhead working truck

A technology for high-altitude operating vehicles and line faults, which is applied in circuit breaker testing, short-circuit testing, etc., can solve problems such as high risk, inaccurate detection results, and burnout of the controller input port detection switch, so as to improve the service life and avoid The effect of burning, small cost

Pending Publication Date: 2022-05-24
XCMG XUZHOU TRUCK MOUNTED CRANE
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Problems solved by technology

This solution has the following problems: to realize this function, it is necessary to output a voltage value to the resistor network. When the external line is short-circuited to the ground, a large current will be formed in the loop instantaneously, which will cause the input port of the controller or the detection switch to burn out, and the risk is relatively high.
In addition, the device can only detect the fault state of the wire, but cannot detect the fault state of the detection switch, the fault detection is not comprehensive enough, and when the detection switch fails, the detection result will be inaccurate

Method used

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  • Self-diagnosis device and method for line fault of landing leg of overhead working truck

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Embodiment Construction

[0020] In order to further illustrate the details and advantages of the technical solution of the present invention, it will now be described in conjunction with the accompanying drawings.

[0021] like figure 1 As shown, the self-diagnosis device for outrigger line faults of aerial work vehicles includes four independent detection circuits, which are used to detect the compaction of the left front vertical outrigger, right front vertical outrigger, left rear vertical outrigger and right rear vertical outrigger respectively and wiring failures. Since the configuration of each path is exactly the same, one of the paths is used here as an example for description.

[0022] The self-diagnosis device for outrigger line faults of aerial work vehicles includes a controller 4, a detection resistor board 1 and a position detection travel switch 2; the detection resistor board 1 is composed of a detection resistor A1-1 and a detection resistor B1-2, and the detection The resistance va...

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Abstract

An overhead working truck supporting leg line fault self-diagnosis device comprises a controller which comprises a detection resistance plate and a position detection travel switch. The detection resistance plate is composed of a detection resistor A and a detection resistor B, and the resistance values of the detection resistor A and the detection resistor B are different; the position detection travel switch comprises a normally open switch and a normally closed switch; the detection resistor A and the detection resistor B are respectively connected in series with a normally open switch and a normally closed switch; the position detection travel switch is connected with the input end of the controller, and the controller reversely deduces the fault types of the circuit and the detection switch according to different detected resistance values.

Description

technical field [0001] The invention relates to the technical field of outrigger fault diagnosis of an aerial work vehicle, in particular to a device for self-diagnosing circuit faults of an outrigger of an aerial work vehicle. Background technique [0002] As a typical high-altitude manned operation device, the safety and stability of the operation of the aerial work vehicle are the most basic requirements. The compaction detection of the four vertical legs is the most important indicator for the stability of the vehicle. The travel switch for vertical outrigger compaction detection is installed on the upper part of the valve lock of the vertical outrigger cylinder, and the detection wire harness is laid along the hydraulic oil circuit through the inside of the horizontal outrigger, and needs to be stretched with the expansion and contraction of the horizontal cylinder. Because of the tight space inside the leveling legs, wiring harnesses often fail due to pinching or wear....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/52G01R31/327
CPCG01R31/52G01R31/327
Inventor 曹丹商晓恒李根文满军苗长青张宇蔡书峰
Owner XCMG XUZHOU TRUCK MOUNTED CRANE
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