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Multi-dimensional vibration sensor

A vibration sensor, speed sensor technology, applied in instruments, measuring devices, measuring ultrasonic/sonic/infrasonic waves, etc., to achieve the effect of convenient installation and use, and improved reliability

Active Publication Date: 2011-09-07
JIANGYIN JIANGLING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To overcome the shortcomings in the use of a single sensor, the power line and signal can be output in the same bundle, which is convenient for the installation and use of the sensor, and also improves the reliability

Method used

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Embodiment Construction

[0013] The structure of the present invention is shown in the figure. When the housing 6 of the sensor is fixed on the vibrating object, the entire sensor vibrates along with the vibrating object, and the vibrating coil 7 in the air gap is fixed with very soft reeds 1, 8 On the shell, its natural frequency ωn is relatively low. When the natural frequency ω≥1.5ωn, the moving coil is in a relatively static state (relative to the sensor housing), and relative movement occurs between the coil and the magnetic steel. The moving coil cuts the magnetic field lines and generates an induced electric potential E:

[0014] E=BLν

[0015] Where B-magnetic field strength

[0016] L-Induction coil magnetic field strength

[0017] ν-relative speed of motion

[0018] When B and L are constant, the output potential E is proportional to the vibration speed ν. Because the relative speed of its vibration is relative to a certain static point in space, it is also called an absolute speed sensor.

[0019] ...

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Abstract

The invention discloses a multi-dimensional vibration sensor. In the multi-dimensional vibration sensor, an eddy current sensor and an absolute velocity sensor are arranged in a shell; an end part of the shell is provided with a flat induction coil; the induction coil is fixed at one end of a stainless steel bolt; a lead of the induction coil is connected with a processing circuit of an internal proximitor; the eddy current absolute velocity sensor is arranged in the shell; the absolute velocity sensor consists of disc upper and lower soft reeds, permanent magnet steel, a damping cup, a magnetizer, a connecting rod, a bracket and a moving coil; the moving coil is fixed on the connecting rod and the bracket; a permanent magnet steel strip and the magnetizer are fixed; the section of the magnetizer is H-shaped; the permanent magnet steel is fixed in the middle of an H-shaped horizontal strip; the moving coil is sleeved on the magnet steel on the upper part of the H-shaped horizontal strip, and the lower part of the H-shaped horizontal strip is connected with the damping cup; and centers of the disc upper and lower soft reeds are fixed on the connecting rod, the bracket and the damping cup respectively, and edges of the discs of the disc upper and lower soft reeds are fixed on the shell.

Description

Technical field [0001] The invention relates to a multi-dimensional vibration sensor. Background technique [0002] Large-scale rotating machinery and equipment in the industrial field, such as steam turbine generator sets, hydraulic generator sets, compressor sets, gas turbines, fans, motors, water pumps, gears and rolling bearings, etc. The online monitoring devices that these equipment need to use generally use multiple single vibration sensors (including shaft vibration). [0003] The sensor can establish a strict vibration monitoring and analysis system for the equipment through the vibration monitoring and protection device. Through continuous monitoring of important state parameters of equipment operation, timely understanding of equipment operating conditions, providing important data for the pre-diagnosis of accident signs, rapid diagnosis and analysis of failures that have occurred, timely pointing out the cause of the failure, and reminding the operator to take necessar...

Claims

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Application Information

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IPC IPC(8): G01H11/02
Inventor 夏惠兴华洪斌
Owner JIANGYIN JIANGLING TECH
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