Magnetostriction liquid level sensor
A magnetostrictive liquid level and sensor technology, applied in the sensor field, can solve the problems of abnormal signal output, output signal jump, pulse signal acquisition distortion, etc., to improve anti-interference ability, resist surge voltage, and stable signal output Effect
Active Publication Date: 2016-05-04
北京和光伟业传感技术有限公司
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Problems solved by technology
[0005] (1) The coil is easily affected by strong electromagnetic interference, resulting in distortion of the pulse signal acquisition by the coil, abnormal signal output, and inaccurate measurement;
[0006] (2) The product lacks a protection circuit under strong surge voltage and surge current conditions, which may easily lead to damage;
[0007] (3) The output signal of the product jumps and cannot work normally under the working environment induced by electric fast transient burst and radio frequency electromagnetic field;
However, when the product is in a strong electromagnetic interference environment, it cannot work normally like in an ordinary environment
Method used
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[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with specific examples. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.
[0028] like Figure 1 to Figure 4 as shown,
[0029]A magnetostrictive liquid level sensor includes a sensor head 1, a measuring rod 2 and a float assembly 3; the measuring rod 2 is fixedly connected to the sensor head 1, and the float assembly 3 is installed on the measuring rod 2, and the float assembly 3 can move freely along the casing of the measuring rod 2; the sensor head 1 includes a fixed seat 11, a measurement circuit assembly 12, an outer shield 13 and a...
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The invention discloses a magnetostriction liquid level sensor which comprises a sensor head, a measuring rod and a floating ball assembly. The measuring rod is fixedly connected with the sensor head. The floating ball assembly is installed on the measuring rod and can freely move along a shell of the measuring rod. The sensor head internally comprises a fixed base, a measuring circuit module, an outer shielding case and a coil shielding case. The measuring circuit module comprises a coil, a measuring circuit board and a return wire. The measuring circuit board is installed on the fixed base. The coil is installed on the measuring circuit board. The coil shielding case covers the coil to shield the coil. The outer shielding case is installed on the fixed base, and covers the measuring circuit board and the coil to shield the measuring circuit module. The magnetostriction liquid level sensor is high in space utilization rate and capable of effectively reducing noise and influences of electromagnetic interference, and has the advantages of being high in anti-interference capability, high in measuring precision and the like.
Description
technical field [0001] The invention relates to the technical field of sensors, in particular to a magnetostrictive liquid level sensor that can work normally in a strong electromagnetic interference environment. Background technique [0002] The magnetostrictive liquid level sensor is a tool that uses the Wiedemann effect of the magnetostrictive material to accurately measure the position by generating a strain pulse signal through the intersection of two different magnetic fields. Its measurement implements the non-contact measurement of absolute position, which has the advantages of large measuring range, high precision and high reliability, and is widely used in various position measurement. [0003] However, since the signal generation of the magnetostrictive liquid level sensor is based on the magnetic field generated by the current pulse, the signal acquisition adopts coil-like inductive devices, and these sensitive devices or magnetic fields are easily affected by va...
Claims
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IPC IPC(8): G01F23/72
CPCG01F23/72
Inventor 汪亮赵中和朱永斌汪锋
Owner 北京和光伟业传感技术有限公司