Leveling system for high-altitude operation platform by means of PWM (pulse-width modulation) control technology

Abstract

A leveling system for a high-altitude operation platform by means of PWM (pulse-width modulation) control technology comprises a supporting arm, a control box, the high-altitude operation platform, an LEM (laser energy monitor) controller, a static angle sensor, a mercury angle switch, a connecting plate, an oil pump, an oil box, a power output device, a safety valve, a speed regulating valve, a leveling proportional valve, a two-way speed limiting valve and a leveling cylinder. The LEM controller is mounted on the operation platform, an analog circuit is controlled by the PWM control technology and digital output of a microprocessor, the LEM controller is used for detecting angles, outputting signals and controlling a proportion leveling valve, the oil pump, the speed regulating valve, the leveling proportional valve, the two-way speed limiting valve and the leveling cylinder to form a hydraulic oil circuit, and the leveling cylinder is organically connected with the supporting arm and the operation platform through connecting blocks. An inclined angle signal of the high-altitude operation platform can be constantly detected by a leveling controller, the inclined angle of a plane is automatically adjusted in the horizontal or vertical direction, and proportional quantities are automatically outputted, so that the operation platform is constantly kept horizontal.

Description

technical field [0001] The invention belongs to the technical field of high-altitude work platform control, and relates to PWM (pulse width modulation) control technology, which is controlled by an all-digital microprocessor and has a built-in leveling sensor, and is applied to an automatic leveling system of high-altitude work platforms. Background technique [0002] At present, in the leveling of aerial work platforms, there are mainly two methods of leveling using traditional tie rods and using angle sensors and switching solenoid valves, both of which have certain limitations. The former is only suitable for application on folding arms and is not suitable for It is suitable for telescopic booms and hybrid booms, and the latter has higher processing requirements for structural parts and poor leveling stability. The lift truck is developing towards a higher, longer and more complex direction, and at the same time, the requirements for the safety, reliability and stability ...

AI Technical Summary

Problems solved by technology

[0002] At present, in the leveling of aerial work platforms, there are mainly two methods of leveling using traditional tie rods and using angle sensors and switching solenoid valves, both of which have certain limitations. The former is only suitable for application on folding arms and is not suitable for It is suitable for telescopic booms and hybrid booms, and the latter has higher processing requirements for structural parts and poor leveling stability in application

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