Lesson 5Static Performance

1、Lesson 5 Static Performance, Backgrounds Text tour Language in use Vocabulary Structure Reading/writing techniques,2020/9/15,1,测控技术与仪器英语教程,Backgrounds, Terminology Static Performance 静态性能 The Ideal Measuring System 理想测量系统 Static sensitivity 静态灵敏度 Accuracy 准确度 Precision 精度 probable errors 概率误差 Reprod

2、ucibility 一致性 Possible errors 可能误差 Repeatability 重复性 Stability 稳定性,2020/9/15,2,测控技术与仪器英语教程,Backgrounds, Terminology Constancy 恒定性 Range 量程 Span 范围 Tolerance 公差 Linearity 线性度 Resolution 分辨率 Dead-band 死区 Hysteresis 滞后,2020/9/15,3,测控技术与仪器英语教程,Text tour, Outline 5.1 The Ideal Measuring System 5.2 Sensit

3、ivity 5.3 Accuracy and Precision 5.4 Possible and Probable Errors 5.5 Other Static-Performance Terms,2020/9/15,4,测控技术与仪器英语教程,5.1 The Ideal Measuring System, The ideal measuring system is one where the output signal has a linear relationship with the measured, where no errors are introduced by effect

4、s such as static friction, and where the output is a faithful reproduction of the input no matter how the input varies two ways of measuring and controlling the system performance,2020/9/15,5,测控技术与仪器英语教程,5.2 Sensitivity, the definiens of Static sensitivity Static sensitivity is defined as the ratio

5、of the change in output to the corresponding change in input Static sensitivity Sensitivity may have a wide variety of units, depending on the instrument or measuring system,2020/9/15,6,测控技术与仪器英语教程,5.2 Sensitivity, relationship between output and input linear relationship non-linear relationship sen

6、sitivity equals the slope of the calibration graph how to calculate the system sensitivity,2020/9/15,7,测控技术与仪器英语教程,5.3 Other Static-Performance Terms, how to state the accuracy Accuracy is normally stated in terms of the errors introduced Percentage error = in practical,it is always use the follow t

7、o express Percentage error = the different between the Accuracy and Precision,2020/9/15,8,测控技术与仪器英语教程,5.4 Possible and Probable Errors, possible errors Consider a measurement that involves the use of three devices with maximum possible errors of , , Maximum possible error = probable errors more prac

8、tical way of expressing the overall system error root-sum-square error =,2020/9/15,9,测控技术与仪器英语教程,5.5 Other Static-Performance Terms, Reproducibility Repeatability Stability Constancy Range Tolerance Linearity Resolution Dead-band Hysteresis,2020/9/15,10,测控技术与仪器英语教程,Language in use,Vocabulary faithfu

9、l, calibrating , confuse ,range Structure Reading/writing techniques,2020/9/15,11,测控技术与仪器英语教程,faithful in dictionary,忠心的：对人、观点或事物绝对坚定和效忠的；忠 诚的 充满信心的 可信的，可靠的：值得信任或信赖的；可信赖的 符合事实的：与事实或实际一致的,2020/9/15,12,测控技术与仪器英语教程,faithful in text,The ideal measuring system is one where the output signal has a linear

10、relationship with the measured, where no errors are introduced by effects such as static friction, and where the output is a faithful reproduction of the input no matter how the input varies. 理想测量系统的输出信号与被测量是线性关系，在理想测量系统中不会引入像静态摩擦那样产生的误差，而且无论输入变量如何，输出信号总是输入信号真实的反映。,2020/9/15,13,测控技术与仪器英语教程,faithful

11、in use,a faithful reproduction of the portrait. 与画像一致的复制品,2020/9/15,14,测控技术与仪器英语教程,calibrating in dictionary,确定（管道的）口径 使标准化：对作校正；调整 校准；校核、调整或通过与一标准比较而确定,2020/9/15,15,测控技术与仪器英语教程,calibrating in text,Thus, in calibrating a pressure gauge against a deadweight tester, the readings from the latter would

12、be taken as true values. 因此，在校准相对于净重测量仪的压力表时，下面读出的值将被作为“真值”。,2020/9/15,16,测控技术与仪器英语教程,calibrating in use,calibrate a thermometer. 校准一支温度计 calibrated the polling procedures to ensure objectivity. 为保证客观性而使投票过程标准化,2020/9/15,17,测控技术与仪器英语教程,confuse in dictionary,使迷惑：使不能清析地思考或理智地行动；使犯错误 使感觉窘迫 误解（一个当成另一个）：

13、 使不透明；把弄模糊： 使混乱：无感觉或顺序的糅合；使混淆,2020/9/15,18,测控技术与仪器英语教程,confuse in text,Precision is a term that is sometimes confused with accuracy “精确度”这个术语有时常和准确度混淆,2020/9/15,19,测控技术与仪器英语教程,confuse in use,confused effusiveness with affection. 把言语的吐露误解为故意的炫耀 The old labels . . . confuse debate instead of clarifyin

14、g it “旧的标签不但无法澄清议题，反而使它更加模糊了”,2020/9/15,20,测控技术与仪器英语教程,range in dictionary,范围：认知、知识、经验或能力方面的范围 界限：活动发生的地域或范围 涵盖的范围：涉及的所有范围 变动的范围：变化的数量或程度 阶级，等级：阶级、等级或次序,2020/9/15,21,测控技术与仪器英语教程,range in text,The total range of values which an instrument or measuring system is capable of measuring . 仪器或测量系统所能测量的整个范围,2020/9/15,22,测控技术与仪器英语教程,range in use,within the range of possibilities. 在可能的最大范围内 a wi