传感器的应用与解题(国外英文资料).doc

传感器的应用与解题(国外英文资料) I carefully organize the documents, documents from the network I just sort of If there is an error Please check your! An analysis of sensor exercises in physics in Senior High School The requirement of teaching reform on cultivating students ability From the point of view of college entrance examination in recent years The actual application questions more and more close to the actual problem and physics knowledge As an important component of sensor information collection Play an important role in the automatic control and information processing technology But more and more questions about the sensor A sensor is the physical quantity can be felt (such as force, heat, light, sound, etc.) into easy measurement (usually a class of elements of electrical quantity) The working process is sensitive to a physical quantity through the signal will feel the signal components according to certain rules into the easy to use The sensor can be classified according to their use of the components (such as capacitive sensor, sensor etc.) Can also according to the signal converted to classification (such as photoelectric and thermoelectric sensor) This paper has collected some exercises and high school physics knowledge to the common sensor And the latter classification For your reference 1. thermoelectric sensor: Thermoelectric sensor refers to the temperature signal into an electric signal of the sensor There are two types: one is changing with the temperature changes caused by a component shape in the sensor (such as thermal expansion and contraction) to convert the signal; there is a temperature change causes the resistance to change (such as thermal semiconductor material resistance with the increase of temperature resistance decreases to convert the signal) Case 1: starter of fluorescent lamp can also be regarded as a thermal sensor device It is a temperature sensitive functional bimetal Can you tell the working principle of starter? The fluorescent lamp start