Optimization Design And Implementation Of Magnetostrictive Displacement Sensor

A magnetostrictive linear position sensor is a kind of non-contact absolutedisplacement sensor measuring displacement by methods of magnetostrictivematerials’ magnetostrictive effect and its inverse effect. It has a lot ofadvantages, such as non-contact, high accuracy, good repeatability, stabilityand reliable, strong environmental adaptation ability, the moderate cost, andso on. Therefore, it is widely used in various liquid level measurement systemsof tank storage in many industries such as petroleum, chemical industry, waterconservancy, beverage, aviation, shipping, etc. In addition, magnetostrictivelinear position sensors have had wide application in the displacement measurement of machine tools and hydraulic control.This paper introduces the measurement principle of magnetostriction lineardisplacement sensors in first. Then the key technologies in the application ofsensors are carried through principle analysis and optimization realization. Inthe design of pulse excitation generator, a implementation scheme is putforward, which has a low cost, low power consumption as well as good impulsequality. And the pulse amplitude increases to60v. In the design of echo signalpick-up device, firstly the influence factors of pick-up signals are obtainedthrough the theory analysis, and then a series of experiments furthermoreconfirm key parameters. In the design of the timing device, this paper putsforward a simple timing plan which satisfies the accuracy requirement at thesame time. In the function module design, outputs of a variety of interfacesignals make the sensor’s applications more extensive and the communicationmore convenient. In the software design, the traditionalforeground-background systems are improved, and a kind of softwarearchitecture is put forward that can realize message capture and multitaskingin a8-bit processor, making the system more concise and reliable. In thesensor calibration experiment, a friendly and convenient operating process isdesigned using LABVIEW language in the upper computer, and staticcharacteristics of the sensor are analyzed. Experimental analysis results show that the sensor’s linearity is±0.002184%, hysteresis is0.0014875%, repeatability is±0.003%that all thestatic characteristics of the sensor can meet the design requirements. And thesensor has the advantages of low cost, low power consumption andmulti-interface and so on.