Magnetostrictive self-calibration distance meter

Abstract

The invention provides a magnetostrictive self-calibration distance meter and belongs to the technical field of distance meters. A pulse-width modulation (PWM) port of an embedded processor is connected with one end of a voltage booster, the other end of the voltage booster is connected with one end of a rectifier, the other end of the rectifier is respectively connected with one end of an electronic switch and one end of a voltage divider, the other end of the voltage divider is connected with an analog / digital (A / D) interface of the embedded processor, a current pulse output end of the electronic switch is connected with an elastic steel wire, and a switch signal input end of the electronic switch is connected with an input / output (I / O) interface of the embedded processor. Accuracy of the magnetostrictive self-calibration distance meter is only determined by the distance accuracy of a first detection coil and a second detection coil and time resolution and is not influenced by environment temperature or pull spring tension, and therefore high accuracy and high stability can be obtained simultaneously. Power consumption of the magnetostrictive self-calibration distance meter is limited to be within 1 watt, and a battery can be used for supplying power to the magnetostrictive self-calibration distance meter. The magnetostrictive self-calibration distance meter can ensure millimeter-level accuracy within 15m, is nearly not influenced by environmental factors, and is not needed to be calibrated due to working environment.

Description

technical field [0001] The invention relates to a magnetostrictive self-calibrating range finder, which belongs to the technical field of range finders. Background technique [0002] Magnetostriction means that when an object is subjected to an external magnetic field, it will produce relative deformation along the direction of the magnetic force line. All ferromagnetic materials have a magnetostrictive effect, and different materials have different magnetostrictive effects. Some materials elongate under the action of an external magnetic field and have a positive magnetostrictive coefficient; while some materials shorten under the action of an external magnetic field and have a negative magnetostrictive coefficient. The magnetostriction coefficient. [0003] According to the different forms of geometric size change of ferromagnetic materials in the magnetic field, the magnetostrictive effect can be divided into longitudinal effect, transverse effect, torsion effect and vol...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the existing magnetostrictive range finder is greatly affected by environmental parameters, and the ambient temperature and elastic steel wire tension will affect the measurement accuracy, and then provide a magnetostrictive self-calibration range finder

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