Electrical equipment dual protection method and system based on speed and position

Abstract

The invention provides an electrical equipment dual protection method and system based on the speed and the position. The method comprises steps of calculating displacement according to time integration of an actual speed detected by a speed measurement encoder; calculating relative displacement according to the pulse of a position detector; calculating real-time displacement deviation; and carrying out real-time determination and protection, at necessary moments, stopping a vehicle immediately, cutting off the speed given and sending an alarm. The method is dual real-time mutual verification based on the speed and the position, and only one of the speed measurement encoder and the position detector is valid, a fault can be detected. The probability that the two sensors are failed at the same time is very little, so that the method provided by the invention is very high in reliability.

Description

technical field [0001] The invention relates to metallurgical automatic control, in particular to a double protection method for electric equipment based on speed and position. Background technique [0002] In the automatic control system, fast and precise position control is often performed on a device driven by an electric motor with a limited position. Generally, a speed-adjusting motor is configured to drive the device through a gearbox and a worm gear mechanism, and a speed-measuring code is installed on the side of the motor shaft. The encoder and position sensor, the speed encoder signal enters the transmission system for precise speed closed-loop control, and the position sensor is connected to the host computer for position closed-loop control. [0003] This kind of device must have protective measures to prevent tooth loss or jamming, and the general method is disconnection detection and start-up protection. Start protection means that after the start command is i...

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at the electric equipment installed with the speed measuring encoder and the position detector at the same time, and aims at the defect that the upper computer only performs disconnection detection and start-up protection on the position detector under normal circumstances, without considering the signal failure open-loop situation in the position adjustment process , put forward the protection measure of double real-time comparison of speed signal and position signal at the same time, to solve the shortcomings of the existing technology

Images