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3BCM germanium magnetic sensing transistor developed displacement sensor

Author: RenDunLiang
Tutor: WenDianZhong
School: Heilongjiang University
Course: Microelectronics and Solid State Electronics
Keywords: Germanium magnetic transistor Displacement sensor Output characteristics Temperature compensation
CLC: TP212.1
Type: Master's thesis
Year: 2009
Downloads: 15
Quote: 0
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Abstract


The displacement sensor is a displacement signal is converted into the associated apparatus of the useful power output of the corresponding relationship . The displacement of the measurement is very critical in many engineering project . Also indirectly through the measurement of the displacement , the measurement of other physical or signal information . The rapid development of industrial automation , the application of the displacement sensor is extremely broad , it is an important part to achieve automatic control and automatic detection , if not the sensor accurate and reliable measurement of the original parameters , automatic control and automatic detection will not be completed . The short history of the development of magnetic sensing device sensing technology , but the magnetic sensing device sensing with excellent sensitivity and low cost quickly realize the industrialization . In this thesis, 3BCM - germanium magnetic sensing transistor developed displacement sensor . Germanium magnetic transistor 3BCM structure and characteristics of the in-depth study and discussion , to understand the reason for the change of the 3BCM germanium Magnetic transistor parameters , methods and principles of master control temperature drift , differential circuit , constant current source circuit technology weaken a 3BCM germanium the magnetic transistor output characteristic curve adversely affected by temperature , it possible to make use of the devices developed displacement sensor ; the LM324 integrated op amp amplifier circuit is designed to improve the measurement accuracy favorable ; single chip microcomputer AT89C51 the structure and performance of the ADC0809 analog-to-digital converter , 74LS02 , 74LS74 and digital tube , designed circuit voltage display and application voltmeter display program written in assembly language , to achieve a digital display of the measured voltage . There was no relevant reports this thesis using 3BCM Germanium Magnetic transistor developed displacement sensor is the first time 3BCM - germanium magnetic sensing transistor developed displacement sensor , this research laid the foundation for the development and utilization of germanium magnetic devices . With the deepening of the study and the technology matures , germanium magnetic devices in the field of development of displacement sensors will be widely used , will have some impact on the development and utilization of the displacement sensor .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor > Physical sensors
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