Rotation angle measuring method, device, system and engineering machine

Abstract

The invention relates to the technical field of engineering machine measuring and control, in particular to a rotation angle measuring method, device and system and an engineering machine to improve the measuring accuracy of a rotation angle. The rotation angle measuring system comprises a rotation speed sensor used for detecting the rotation speed of a hydraulic pump, at least one proximity switch and a controller, wherein each proximity switch sends out a sensing pulse when inducing teeth of an induction gear of a rotation mechanism, and the controller is in signal connection with the hydraulic pump, the rotation speed sensor and each proximity switch and used for determining the current induction pulse count according to the rotation direction of the rotation mechanism. A rough measurement value of the rotation angle is obtained according to the current induction pulse count. The rotation speed of the induction gear is obtained according to the rotation speed of the hydraulic pump and the control currents of the hydraulic pump, the variation of the rotation angle is obtained according to the rotation speed of the induction gear and the time difference between sampling time and current induction pulse generation time, and the accurate measurement value of the rotation angle is obtained according to the rough measurement value of the rotation angle and the variation of the rotation angle.

Description

technical field [0001] The invention relates to the technical field of construction machinery measurement and control, in particular to a method, device, system and construction machinery for measuring a rotation angle. Background technique [0002] The slewing mechanism widely exists in various construction machinery (such as tower cranes, pump trucks, etc.), and the measurement of the slewing angle is crucial to the control and safety of construction machinery movements. Therefore, construction machinery needs to be equipped with high reliability and accuracy swivel angle measuring equipment. [0003] Today, there are many types of rotary encoders on the market. Their measurement accuracy is high, but their impact resistance is poor, so they cannot be used in the harsh working environment of construction machinery. There is also another rotation angle measuring device in the prior art, such as figure 1 As shown, it includes a controller (not shown in the figure) and two ...

AI Technical Summary

Problems solved by technology

[0004] The defect of the above-mentioned rotary angle measuring equipment is that, limited by the number of teeth of the induction gear, the number of induction pulses generated by the two proximity switches is limited when the rotary mechanism rotates one circle, and the detection accuracy is low.

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