Unlock instant, AI-driven research and patent intelligence for your innovation.

Vibration sensor with InSb-NiSb magnet sensitive resistor

A technology of vibration sensor and magneto-sensitive resistor, which is applied in the direction of using electric/magnetic devices to transmit sensing components, instruments, and electric devices, etc., can solve problems such as distortion, achieve small distortion, large original signal, and facilitate circuit materials and The effect of computer analysis

Inactive Publication Date: 2008-08-27
BEIJING FLASHLIGHT SENSOR TECH
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The piezoelectric type will produce distortion when the frequency is low and the frequency is extremely high, and the amplitude is small.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Vibration sensor with InSb-NiSb magnet sensitive resistor
  • Vibration sensor with InSb-NiSb magnet sensitive resistor
  • Vibration sensor with InSb-NiSb magnet sensitive resistor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1. One end of the elastic film sheet 8 is fixed on the metal support 5, and the other end of the elastic film sheet is fixed with a NdFeB permanent magnet 2, and the fixing method is bonded with epoxy. The magneto-sensitive resistance sheet 3 is made of InSb-NiSb, and is placed on the position facing the permanent magnet 2 with a certain gap. The magneto-sensitive resistance sheet is installed on the electronic processing circuit board 1 . The electronic processing circuit board 1 is fixed on the metal bracket 5 for installation. Lead wires 4 are drawn out from the electronic processing circuit board 1 for power input and signal output. Whole structure uses metal shell 6. When working, the sensor is installed on the measured object 7 in close contact. When the measured object 7 vibrates, the elastic film 8 of the cantilever structure will vibrate correspondingly with the vibration frequency and size of the outside world, and its vibration changes the origi...

Embodiment 2

[0012] Both ends of the elastic film sheet 8 are fixed on the support 5 . The permanent magnet 2 is placed in the middle, and still maintains a certain gap facing the magneto-sensitive resistor sheet 3 . The strontium ferrite permanent magnet 2 is selected, and the fixing method is mechanically fixed. The magnetoresistor sheet 3 is made of InSb-In, and is placed on the position facing the permanent magnet 2 with a certain gap. The magnetoresistor sheet is welded on the electronic processing circuit board 1 . The electronic processing circuit board 1 is fixed on the mounting plastic bracket 5 . Lead wires 4 are drawn out from the electronic processing circuit board 1 for power input and signal output. The whole structure uses a plastic shell 6, and the vibration sensor of this structure is particularly suitable for occasions with higher vibration frequencies.

Embodiment 3

[0014] It is installed in a non-contact manner between the measured body (magnetic material) and the sensor. A bias permanent magnet 2 is fixed behind the magneto-sensitive resistor 3 . The magnetoresistor sheet is mounted against the housing. When the measured body (magnetic material) vibrates up and down, the magnetic flux passing through the magneto-sensitive resistor will still change, which will also cause resistance changes. Through electronic circuit processing, an AC analog voltage signal that reflects the actual state of vibration can be obtained.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the electric element sensor field which relates to a vibration sensor produced by utilizing the InSb-NiSb magneto-resistance effect principle. The vibration sensor is widely applicable to the long-term vibration monitoring and protection of instruments and equipment in the industries of electric power, petroleum, chemical engineering, metallurgy, communication, architecture, military, etc., particularly applicable to a systematic online automatic detection and alarm system. The vibration sensor consists of an InSb-NiSb magneto-resistance piece, a permanent magnet, an electronic processing circuit board, a fixed support, a casing, an elastic film piece, an outgoing lead, etc. When a tested body vibrates up and down, the magnetic film piece in the sensor is enabled to move up and down, thereby enabling the distance between the magnet and the magneto-resistance piece to consequently change. The magnetic flux passing through the magneto-resistance piece also changes to produce a corresponding electrical signal which is to be processed by the electronic circuit. Finally a voltage waveform signal corresponding to the vibration amplitude and frequency is outputted and the aim of vibration measurement is achieved. The sensor smoothes the way for the follow-up circuit material and computer analysis with good frequency characteristics, high sensitivity, simple structure, big original signal and low degree of distortion.

Description

technical field [0001] The invention belongs to the field of electrical component sensors, and relates to a vibration sensor manufactured by using the principle of InSb-NiSb magnetoresistance effect, which is widely used in the detection of instruments and equipment in industries such as electric power, petroleum, chemical industry, metallurgy, transportation, construction, and military industry. Long-term vibration monitoring and protection, especially for system online automatic detection and alarm system. Background technique [0002] At present, vibration sensors are commonly divided into two types: one is magnetoelectric and the other is piezoelectric. The magnetoelectric type uses vibration to cause the movable coil or soft and hard magnetic materials to move, and the moving body cuts the magnetic force line to make the magnetic flux change with time, thereby generating an induced electromotive force inside the coil, which generates an electrical signal; the piezoelect...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01H11/02G01D5/16
Inventor 王元玮郭斐云
Owner BEIJING FLASHLIGHT SENSOR TECH