Acceleration sensor

Abstract

The invention discloses an acceleration sensor, which comprises leads, a sensor shell, metal strain gauges, a composite elastic beam, mass blocks and a cover plate; the composite elastic beam is arranged in the sensor shell; the cover plate is installed outside the sensor shell; the metal strain gauges are respectively stuck on the upper and lower surfaces of the composite elastic beam; the metal strain gauges are provided with the leads; the leads are leaded out from the side surface of the sensor shell; a fixed hole is reserved in the front part of the composite elastic beam; the mass blocks are installed over and below the fixed hole; and the mass blocks are vertically symmetrical relative to the composite elastic beam. The acceleration sensor disclosed by the invention is simple to produce, steady to output analogue signals and simple in amplification circuit, and is capable of measuring the vibration intensity and direction of a coal sieve; therefore, the purpose of controlling the vibration intensity is achieved, and the acceleration sensor is an ideal device for measuring vibration and the like of the coal sieve.

Description

Technical field: [0001] The invention relates to an acceleration sensor, in particular to an acceleration sensor for measuring a coal preparation vibrating screen. Background technique [0002] In the coal industry, piezoelectric acceleration sensors, silicon piezoresistive acceleration sensors, etc. are commonly used as acceleration sensors for measuring the vibration of coal preparation screens. Although the price of the piezoelectric acceleration sensor currently used is moderate, the secondary processing circuit is complex and the cost is high; the cost of the silicon piezoresistive pressure sensor is low, but the protection is simple and easy to damage. Contents of the invention [0003] The object of the present invention is to provide an acceleration sensor with stable performance and simple structure to solve the problems raised in the above-mentioned background technology. [0004] To achieve the above object, the present invention provides the following technic...

AI Technical Summary

Problems solved by technology

Although the price of the piezoelectric acceleration sensor currently used is moderate, the secondary processing circuit is complex and the cost is high; the cost of the silicon piezoresistive pressure sensor is low, but the protection is simple and easy to damage

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