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Novel range-adjustable magnetic liquid acceleration sensor

An acceleration sensor and magnetic liquid technology, applied in the field of inertial sensors, can solve the problems of reduced sensor accuracy, smaller restoring force, and short range, and achieve the effects of avoiding accuracy reduction, long life, and adjustable range.

Inactive Publication Date: 2014-03-26
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing magnetic liquid acceleration sensor has a short range and a large volume, and there is a problem that the demagnetization of the permanent magnet leads to a decrease in the restoring force and a decrease in the accuracy of the sensor after long-term use.

Method used

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  • Novel range-adjustable magnetic liquid acceleration sensor

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Embodiment Construction

[0034] The present invention will be further described with accompanying drawing as specific embodiment:

[0035] A magnetic liquid acceleration sensor such as figure 1 , air tank one 1, valve one 2, pressure gauge one 3, left end cover 4, shell 5, inductance coil one 6, inductance coil two 7, cylindrical permanent magnet 8, second rubber sealing ring 9, right end cover 10, pressure Table two 11, air box two 12, valve two 13, ventilation pipe two 14, bolt and nut connection assembly 15, right end cavity 16, magnetic liquid 17, left end cavity 18, first rubber sealing ring 19, ventilation pipe one 20.

[0036] The connection between the parts constituting the sensor: the two grooves on the outer circumference of the shell 5 are respectively wrapped with an inductance coil one 6 and an inductance coil two 7, the inductance coil one 6 is exactly the same as the inductance coil two 7, the two coils The connection adopts a differential connection, and the two coils are connected t...

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Abstract

The invention discloses a novel range-adjustable magnetic liquid acceleration sensor, and belongs to the technical field of inertial sensors. Current magnetic liquid acceleration sensors are short in range and large in size, and also have the problem that for long-term use, the accuracy of sensor is reduced due to that restoring forces are reduced because of demagnetization of permanent magnets. The sensor is composed of an air tank, an air duct, a valve, a pressure gauge, an end cap, a shell, an inductive coil, a cylindrical permanent magnet, a rubber seal ring, a bolt / nut connecting assembly, air, magnetic liquid and a signal circuit, wherein the cylindrical permanent magnet and the magnetic liquid form inertial mass. While enabling the permanent magnet to float in the inner cavity of the shell, the magnetic liquid also can seal the air in the cavities at two ends in the inner cavity of the shell. When moving axially, the inertial mass compresses the air in the cavity at one end to generate the restoring force. The range of the sensor can be adjusted by changing the restoring force through adjusting air pressure in the cavities at two ends in the inner cavity of the shell. The sensor has adjustable range, small size and long service life.

Description

technical field [0001] The invention relates to the technical field of inertial sensors, in particular, the invention relates to a novel magnetic liquid acceleration sensor with adjustable range. Background technique [0002] The magnetic liquid is a new type of functional material formed by uniformly dispersing nano-scale magnetic solid particles into the carrier liquid. The magnetic liquid acceleration sensor is developed by using the characteristic that the magnetic liquid can suspend the permanent magnet or non-magnetic material with a density higher than itself. Compared with traditional acceleration sensors, magnetic liquid acceleration sensors have the advantages of high sensitivity, impact resistance, low energy consumption, and good low-frequency response. The existing structure of the magnetic liquid acceleration sensor, such as the patent US2007 / 0214889A1, has a short range and a large volume. After long-term use, there is still the problem that the demagnetizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P15/105G01P15/13
Inventor 李德才钱乐平
Owner BEIJING JIAOTONG UNIV
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