Sensor-technology传感器技术大学毕业论文外文文献翻译及原文.doc

Sensor-technology传感器技术大学毕业论文外文文献翻译及原文 毕 业 设 计（论文） 外 文 文 献 翻 译 文献、资料中文题目：传感器技术 文献、资料英文题目：Sensor-technology 文献、资料来源： 文献、资料发表（出版）日期： 院 （部）： 专 业： 班 级： 姓 名： 学 号： 指导教师： 翻译日期： 2017.02.14 Sensor technology A sensor is a device which produces a signal in response to its detecting or measuring a property ,such as position , force , torque , pressure , temperature , humidity , speed , acceleration , or vibration .Traditionally ,sensors (such as actuators and switches )have been used to set limits on the performance of machines .Common examples are (a) stops on machine tools to restrict work table movements ,(b) pressure and temperature gages with automatics shut-off features , and (c) governors on engines to prevent excessive speed of operation . Sensor technology has become an important aspect of manufacturing processes and systems .It is essential for proper data acquisition and for the monitoring , communication , and computer control of machines and systems . Because they convert one quantity to another , sensors often are referred to as transducers .Analog sensors produce a signal , such as voltage ,which is proportional to the measured quantity .Digital sensors have numeric or digital outputs that can be transferred to computers directly .Analog-to-coverter(ADC) is available for interfacing analog sensors with computers . Classifications of Sensors Sensors that are of interest in manufacturing may be classified generally as follows: Machanical sensors measure such as quantities as positions ,shape ,velocity ,force ,torque , pressure , vibration , strain , and mass . Electrical sensors measure voltage , current , charge , and conductivity . Magnetic sensors measure magnetic field ,flux , and permeablity . Thermal sensors measure temperature , flux ,conductivity , and special heat . Other types are acoustic , ultrasonic , chemical , optical , radiation , las