Multi-signal-acquisition speed-measurement and reversed-rotation protection and control device and reversed-rotation judgment method

Abstract

Disclosed is a multi-signal-acquisition speed-measurement and reversed-rotation protection and control device including a signal acquisition device and a controller. The signal acquisition device is used for acquiring rotation signals of a rotational mechanical device to be detected. A signal input end of the controller is connected with the signal acquisition device and a control output end is connected with an upper computer or a control device of the rotational mechanical device to be detected. The signal acquisition device includes a signal generating device and/or a signal detection device. The controller includes a single-chip microcomputer, a signal acquisition circuit, a pulse shaping circuit, a phase-inverting circuit, a DA conversion module, a relay output circuit, an analog-signal output circuit, a communication module, a remote-reset and bypass input circuit, a button module, a storage module, a display module and a power-supply module. The multi-signal-acquisition speed-measurement and reversed-rotation protection and control device realizes positive and inversed rotation detection and protection of the rotational mechanical device to be detected and has the characteristics of being large in rotation-speed measurement range, wide in voltage input and provided with current circuit protection for output and the like so that the device is not only powerful in function, but also high in precision, anti-interference and adaptability.

Description

technical field [0001] The invention relates to a protection control device for rotating mechanical equipment, in particular to a multi-signal acquisition speed measurement and reverse protection control device and a reverse determination method. Background technique [0002] Various rotating mechanical equipment such as steam turbine engines, industrial steam turbines, internal combustion engines, water pumps and wind speeds in power plants require speed measurement and protection control. [0003] There are many types of tachometers on the market, but most of them are equipped with designated sensors, which cannot be used universally for different signals and sensors, and it is difficult to unify the standards, which cannot meet the needs of the international market. There are also tachometers with reverse protection, but there are certain defects in principle. To sum up, there are several ways to judge positive and negative: [0004] 1. Install two sensors perpendicular...

AI Technical Summary

Problems solved by technology

However, this method is not suitable for high-speed conditions, the installation position is strict, and the anti-interference ability is low

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