Handle position detector for engineering machinery

Abstract

The invention discloses a handle position detector for engineering machinery. The handle position detector for the engineering machinery comprises a comparator and a power supply unit, wherein the input end of the comparator is connected with a detecting voltage setting unit, a handle position collecting unit, an advancing position setting unit, a draw-back position setting unit and a reversing position setting unit. The input end of the handle position collecting unit is connected with a handle signal output unit. The output end of the comparator is connected with a control signal output unit for outputting a control signal of engineering machinery working. The control signal output unit comprises a first relay, a second relay, a first relay driver which is connected with the first relay and a second relay driver which is connected with the second relay, wherein both the first relay driver and the second relay driver are connected with the output end of the comparator. The handle position detector for the engineering machinery is simple in structure, reasonable in design, low in cost, high in function flexibility, low in power dissipation, low in failure rate, good in extension performance, long in service life, strong in practicability and wide in range of application.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a handle position detector for construction machinery. Background technique [0002] At present, the known handle position detection is composed of a handle, a potentiometer, a PLC controller and a mechanical structure. The potentiometer is built into the control handle through the mechanical mechanism, and the resistance value of the potentiometer changes when the control handle is pushed back and forth. After the power is turned on, the PLC controller detects the change value of the voltage signal caused by the change of the resistance value of the potentiometer to judge the current value of the handle. actual location. However, using this method requires a dedicated PLC controller and a special handle to detect the change value of the voltage signal, which is only applicable to engineering equipment equipped with a display and an EFI engine, so the accuracy req...

AI Technical Summary

Problems solved by technology

However, using this method requires a dedicated PLC controller with a special handle to detect the change value of the voltage signal, which is only suitable for engineering equipment equipped with displays and EFI engines, so the accuracy requirements for the handle position detection in some construction machinery are not strict When the cost of known detection methods is relatively expensive and the scope of application is narrow

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