Device and method for measuring rotational speed on basis of electrostatic sensor array and data fusion

Abstract

The invention discloses a device and a method for measuring rotational speed on the basis of an electrostatic sensor array and data fusion, and belongs to the technical scope of measurement of rotational speed. The device for measuring the rotational speed on the basis of the electrostatic sensor array comprises a group of electrostatic sensors, the electrostatic sensors are equidistantly mounted on the periphery of the edge of a measured rotating component to form the electrostatic sensor array, an electrostatic signal reflecting rotational information of the component is generated by the electrostatic sensor array via electrostatic induction, is amplified and filtered by a conditioning unit, and is fed into a microprocessor system via a signal processing unit, and all electrostatic signals are subjected to multi-channel correlation analysis, rotational speed computation and the data fusion in a microprocessor, so that the rotational speed of the measured rotating component is acquired. Compared with existing methods for measuring rotational speed, such as an analog method, a stroboscopic method and a counting method, the method for measuring the rotational speed on the basis of the electrostatic sensor array has the advantages that the structure of the device is simple, cost is low, influence of environmental factors is avoided, the method is a non-contact measurement method, and accuracy is high.

Description

technical field [0001] The invention belongs to the technical scope of rotational speed measurement, in particular to a rotational speed measurement device and method based on electrostatic sensor array and data fusion. Background technique [0002] Rotational speed is one of the important parameters reflecting the operating condition of rotating equipment. Speed ​​measurement technology is widely used in the test operation and speed adjustment system of rotating equipment such as generators, motors, centrifuges, and machine tool spindles in the industrial field. The accuracy, real-time and reliability of speed measurement are the key to ensure the normal operation of high-speed rotating equipment. Therefore, it is of great practical significance to find an accurate, fast and economical speed measurement method. With the advancement of science and technology, the speed measurement method has developed from the past contact measurement and non-contact measurement to the curr...

AI Technical Summary

Problems solved by technology

However, each measurement method has its limitations

For example, the mechanical tachometer has low measurement accuracy and limited measurement range; the photoelectric tachometer is susceptible to electromagnetic interference and rotation interference and is easily affected by harsh environments; the magnetic induction tachometer has a large temperature error, which is structurally sensitive to rotating magnets and The symmetry of the axis of the aluminum disk is high; the stroboscopic tachometer requires a stable speed state when measuring, which is not suitable for high-speed measurement

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