Magnetic liquid sensor
A magnetic liquid and sensor technology, applied in the field of sensors, can solve the problem of low accuracy
Active Publication Date: 2021-11-02
TSINGHUA UNIV
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- Description
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Problems solved by technology
[0003] However, the magnetic liquid sensor in the related art is only a single-function sensor, that is, the magnetic liquid sensor in the related art can only measure acceleration alone, or measure the micro pressure alone, and the accuracy of the measurement result of the magnetic liquid sensor in the related art is low
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Embodiment Construction
[0021] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0022] Such as Figure 1-Figure 2 As shown, the magnetic liquid sensor according to the embodiment of the present invention includes a housing 1 , a first permanent magnet 2 , a coil 3 , a measuring component 4 and a pressure regulating component 5 .
[0023] The casing 1 has a first cavity 10 filled with a magnetic liquid 11 . Such as figure 1 As shown, the casing 1 is arranged along the left-right direction, and the first chamber 10 is filled with a magnetic liquid 11 . Preferably, the casing 1 is generally cylindrical, and the inner peripheral contour of the cross section of the casing 1 is circular.
[0024] The first permanent magnet 2 is arranged in the...
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The invention discloses a magnetic liquid sensor. The magnetic liquid sensor includes a housing, a first permanent magnet, a coil, a measuring component and a pressure regulating component. The housing has a first chamber filled with magnetic liquid. A permanent magnet is arranged in the first cavity and the magnetic liquid covers the first permanent magnet so that the first permanent magnet is suspended in the first cavity, the coil is wound on the outer periphery of the housing, and the measuring assembly includes a first Hall element, a second The Hall element and the voltmeter, the first Hall element and the second Hall element are arranged on the housing and located on both sides of the coil, the first Hall element and the second Hall element are differentially connected, the voltmeter and the first Hall element The Hall element is connected with the second Hall element, the pressure regulating assembly is connected with the shell, and the pressure regulating assembly is used for regulating the pressure in the first cavity. The magnetic liquid sensor of the embodiment of the present invention can measure both acceleration and micro pressure, and the accuracy of the measurement result is high.
Description
technical field [0001] The present invention relates to the technical field of sensors, and more specifically, to a magnetic liquid sensor. Background technique [0002] Magnetic liquid is a new type of functional material that has both the fluidity of a liquid and the response to a magnetic field. The magnetic liquid acceleration sensor developed by using the characteristics of magnetic liquid has the advantages of no mechanical wear, high sensitivity, impact resistance, low energy consumption and good low frequency response. At the same time, the sensitivity, linearity, reliability and resolution of the micro-pressure sensor developed by using the characteristics of magnetic liquid are higher. [0003] However, the magnetic liquid sensor in the related art is only a single-function sensor, that is, the magnetic liquid sensor in the related art can only measure acceleration or micro pressure alone, and the accuracy of the measurement result of the magnetic liquid sensor in...
Claims
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IPC IPC(8): G01L9/14G01P15/08
CPCG01L9/14G01P15/08
Inventor 李德才韩鹏栋李英松任思杰
Owner TSINGHUA UNIV