An excitation coil drive device for a magnetic sensor

Abstract

The invention discloses a driving device for a magnet exciting coil of a magnetic sensor. The driving device comprises a main support plate and a negative wire end. A sub-support plate is horizontallyfixed on the intermediate position of the main support plate. A sliding varistor is fixed on the left side of the upper end surface of the main support plate. A sliding piece is slidably connected tothe upper side of the sliding varistor through a sliding rod, and the sliding piece is electrically connected to a positive wire end. A sliding rail is vertically arranged on the main support plate at a position directly above the sliding varistor. A pulley is placed inside the sliding rail. A top block is connected to the pulley through the rod body. A conductive sheet at the left end of an amplification coil is cut into an insulating tube at the right end of the other coil on the left side of the amplification coil through an insulating shovel. The insulating shovel is pressed to the lowerside of a convex ball end of a conductive column. Therefore, the conductive column slides upward and rises away from an L-shaped conductive sheet, and the conductive sheet contacts the L-shaped conductive sheet to conduct electricity, more coil turns are connected to the circuit, simultaneous changes in current and coil turns are realized, and effective changes the strength of a magnetic field generated by the magnet exciting coil are ensured.

Description

technical field [0001] The invention relates to the technical field of driving an excitation coil of a magnetic sensor, in particular to an excitation coil driving device of a magnetic sensor. Background technique [0002] The magnetic sensor is to convert the performance changes of sensitive components caused by external factors such as magnetic field, current, stress and strain, temperature, light, etc. into electrical signals, and the magnetic sensor equipped with an excitation coil mainly relies on external factors to generate current changes, of which stress changes are among them. An external factor, which then causes the resulting change in magnetic field strength to act on the corresponding component; [0003] The traditional magnetic sensor excitation coil drive device has the following disadvantages: [0004] Generally, magnetic sensors rely on external factors to act on the current regulator, and then only rely on the current regulator to adjust the current throu...

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Problems solved by technology

[0005] The purpose of the present invention is to provide an excitation coil drive device for a magnetic sensor, to solve the above-mentioned background technology. The general magnetic sensor relies on external factors to act on the current regulator, and then only relies on the current regulator to adjust the current size of the coil. , so that the current increases, the coil generates a stronger magnetic field, but the number of turns of the coil is generally fixed, and the number of turns of the coil also has an impact on the magnetic field strength, so that once the power adjustment components such as current regulators fail, The whole magnetic sensor will not work at all

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