Contact-type leveling device based on comparator

Abstract

The invention discloses a contact-type leveling device based on a comparator. The device comprises a comparator and a power source. A slide arm height position acquisition unit used for acquiring a slide arm actual height position and an upper-lower limit setting unit used for setting slide arm height upper limit position and lower limit position are connected to an input end of the comparator. A control signal output unit is connected to an output end of the comparator. The control signal output unit comprises a lifting solenoid valve, a lowering solenoid valve, a lifting solenoid valve driving device connected with the lifting solenoid valve, and a lowering solenoid valve driving device connected with the lowering solenoid valve. The lifting solenoid valve driving device and the lowering solenoid valve driving device are both connected with the output end of the comparator. The device provided by the invention has the advantages of simple structure, reasonable design, low realization cost, high function flexibility, low power consumption, low failure rate, adjustable sensitivity, high detection precision, high working reliability, long service life, high practicality, and easy popularization. The device can be applied on pavements with different road conditions.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a contact leveling device based on a comparator, which is used to detect and control the height position of construction machinery components relative to the ground. Background technique [0002] At present, the known detection and control of the height position of an object is composed of an ultrasonic sensor, a temperature compensator and a signal processing system. It uses the ultrasonic sensor to generate the sound wave signal, uses the sound wave to propagate in the air and encounters the reflection of the obstacle object, and then receives the reflected ultrasonic signal, uses the propagation speed of the ultrasonic wave in the air to calculate the actual height of the object to the ground, and uses the temperature compensator To make up for the calculation error caused by the change of propagation speed after the ultrasonic signal is affected by temperature,...

AI Technical Summary

Problems solved by technology

However, this method is expensive and has a narrow scope of application, and is not suitable for uneven road conditions. For example, when using an ultrasonic leveling device to control the paving thickness of a paver in construction machinery, it can only be used on asphalt roads with good flatness. The conditions are limited. When the road surface is slightly uneven, the detection accuracy will become lower, which cannot well meet the actual use needs.

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