Electric control device and control method of engine flame extinguisher

Abstract

The invention discloses an electric control device of an engine extinguisher. The engine extinguisher comprises a flexible shaft, a motor used for driving the flexible shaft to stretch out and retract back and a detection switch which is turned on or turned off through triggering of the stretching operation and the retraction operation of the flexible shaft. The electric control device comprises a power circuit, a main controller, a first signal processing circuit, a second signal processing circuit, a motor driving circuit and a current sampling circuit used for sampling a driving current of the motor. The input end of the first signal processing circuit is connected with the signal output end of an ignition switch. The input end of the second signal processing circuit is connected with the signal output end of the detection switch. The input end of the main controller is respectively connected with the output end of the first signal processing circuit, the output end of the second signal processing circuit and the output end of the current sampling circuit and the output end of the main controller is connected with the input end of the motor driving circuit. The invention further discloses a control method of the engine extinguisher. According to the electric control device of the engine extinguisher and the control method of the engine extinguisher, the current overcurrent protection function and the self-recovery function when the current is abnormal are achieved and in addition, a motor driving current does not flow across the detection switch.

Description

technical field [0001] The invention relates to an electronic control device of an engine flame extinguisher and a control method thereof. Background technique [0002] Construction machinery diesel engine oil circuit on-off device, commonly known as "flame extinguisher". A kind of flame extinguisher commonly used at present is electric control cable type, mainly is made up of electronic control device, gear reduction mechanism, mechanical transmission mechanism, micro switch, flexible shaft and flexible shaft drive motor etc. The main disadvantages of existing electronically controlled cable-type flame extinguishers are as follows: [0003] 1. Without any feedback compensation measures, when a fault occurs, no measures can be taken for the fault. After overcurrent occurs, the power supply can only be cut off by the power fuse, which is prone to burn out of components and even wiring harnesses; [0004] 2. Relays are generally used as the motor drive circuit, without coll...

AI Technical Summary

Problems solved by technology

[0003] 1. Without any feedback compensation measures, when a fault occurs, no measures can be taken for the fault

After overcurrent occurs, the power supply can only be cut off by the power fuse, which is prone to burn out of components and even wiring harnesses;

[0004] 2. Relays are generally used as the motor drive circuit, without collecting any electrical signals, and only have the output drive function;

[0005] 3. The micro switch is used as the driving current loop. When the switch handle is switched, the contacts are very prone to sticking, resulting in product failure or even device burnout;

[0006] 4. The motor is easy to overshoot, resulting in a stroke out of tolerance

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