A speed measuring device

Abstract

The invention discloses a rotation speed measurement device, which needs a strip-shaped polyvinyl chloride plastic thin sheet to be fixed on a rotation body. Because when the strip-shaped charge passes through the strip-shaped electrode in a rotation manner, regular inductive charges are formed on the surface of the electrode, the novel structure sensor enables the signal to have multiple same waveforms in a single rotation period through multiple electrodes which are connected in series and are uniformly arranged near the rotation axis; the amplified filtering comparison is performed on the signal outputted by the sensor through a signal conditioning circuit to form a square wave; the square wave is inputted into the single-chip microcomputer control circuit to realize calculation, display, storage and communication on the rotation speed. The invention not only saves the circuit cost, and improves the accuracy through using the single circuit signal to realize the rotation speed measurement.

Description

technical field [0001] The invention belongs to the field of rotational speed measurement, and provides a rotational speed measurement device for rotating equipment on industrial sites. Background technique [0002] The problem of speed measurement exists in many fields such as electrical, mechanical, medical, etc. Accurate and fast acquisition of speed is of great significance. In some specific production processes, not only the speed measurement method is required to have high accuracy and real-time performance, but also the ability of the measuring instrument to resist harsh environments and non-contact. [0003] There are two types of speed measurement methods: analog and digital. The analog speed measurement output is a physical quantity that is linearly related to the speed, and the digital type will generate a signal whose frequency is proportional to the speed during measurement. Commonly used analog speed measurement methods include tachogenerators, and commonly u...

AI Technical Summary

Problems solved by technology

Patent CN202975039U provides a device for measuring rotating objects using an electrostatic sensor. The method belongs to the analog rotational speed measurement method. The time difference between two signals or The rotation cycle is used to calculate the rotational speed, and the microprocessor or PC is used for related calculations, which requires AD acquisition and multi-channel signal conditioning circuits, so the response speed is slow, the cost is high, and it is not suitable for large-scale use.

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