Lesson 5Static Performance

1、Lesson 5 Static Performance, Backgrounds Text tour Language in use Vocabulary Structure Reading/writing techniques,2020/9/15,1,測(cè)控技術(shù)與儀器英語教程,Backgrounds, Terminology Static Performance 靜態(tài)性能 The Ideal Measuring System 理想測(cè)量系統(tǒng) Static sensitivity 靜態(tài)靈敏度 Accuracy 準(zhǔn)確度 Precision 精度 probable errors 概率誤差 Reprod

2、ucibility 一致性 Possible errors 可能誤差 Repeatability 重復(fù)性 Stability 穩(wěn)定性,2020/9/15,2,測(cè)控技術(shù)與儀器英語教程,Backgrounds, Terminology Constancy 恒定性 Range 量程 Span 范圍 Tolerance 公差 Linearity 線性度 Resolution 分辨率 Dead-band 死區(qū) Hysteresis 滯后,2020/9/15,3,測(cè)控技術(shù)與儀器英語教程,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,測(cè)控技術(shù)與儀器英語教程,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,測(cè)控技術(shù)與儀器英語教程,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,測(cè)控技術(shù)與儀器英語教程,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,測(cè)控技術(shù)與儀器英語教程,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,測(cè)控技術(shù)與儀器英語教程,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,測(cè)控技術(shù)與儀器英語教程,5.5 Other Static-Performance Terms, Reproducibility Repeatability Stability Constancy Range Tolerance Linearity Resolution Dead-band Hysteresis,2020/9/15,10,測(cè)控技術(shù)與儀器英語教程,Language in use,Vocabulary faithfu

9、l, calibrating , confuse ,range Structure Reading/writing techniques,2020/9/15,11,測(cè)控技術(shù)與儀器英語教程,faithful in dictionary,忠心的：對(duì)人、觀點(diǎn)或事物絕對(duì)堅(jiān)定和效忠的；忠 誠的 充滿信心的 可信的，可靠的：值得信任或信賴的；可信賴的 符合事實(shí)的：與事實(shí)或?qū)嶋H一致的,2020/9/15,12,測(cè)控技術(shù)與儀器英語教程,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. 理想測(cè)量系統(tǒng)的輸出信號(hào)與被測(cè)量是線性關(guān)系，在理想測(cè)量系統(tǒng)中不會(huì)引入像靜態(tài)摩擦那樣產(chǎn)生的誤差，而且無論輸入變量如何，輸出信號(hào)總是輸入信號(hào)真實(shí)的反映。,2020/9/15,13,測(cè)控技術(shù)與儀器英語教程,faithful

11、in use,a faithful reproduction of the portrait. 與畫像一致的復(fù)制品,2020/9/15,14,測(cè)控技術(shù)與儀器英語教程,calibrating in dictionary,確定（管道的）口徑 使標(biāo)準(zhǔn)化：對(duì)作校正；調(diào)整 校準(zhǔn)；校核、調(diào)整或通過與一標(biāo)準(zhǔn)比較而確定,2020/9/15,15,測(cè)控技術(shù)與儀器英語教程,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，在校準(zhǔn)相對(duì)于凈重測(cè)量儀的壓力表時(shí)，下面讀出的值將被作為“真值”。,2020/9/15,16,測(cè)控技術(shù)與儀器英語教程,calibrating in use,calibrate a thermometer. 校準(zhǔn)一支溫度計(jì) calibrated the polling procedures to ensure objectivity. 為保證客觀性而使投票過程標(biāo)準(zhǔn)化,2020/9/15,17,測(cè)控技術(shù)與儀器英語教程,confuse in dictionary,使迷惑：使不能清析地思考或理智地行動(dòng)；使犯錯(cuò)誤 使感覺窘迫 誤解（一個(gè)當(dāng)成另一個(gè)）：

13、 使不透明；把弄模糊： 使混亂：無感覺或順序的糅合；使混淆,2020/9/15,18,測(cè)控技術(shù)與儀器英語教程,confuse in text,Precision is a term that is sometimes confused with accuracy “精確度”這個(gè)術(shù)語有時(shí)常和準(zhǔn)確度混淆,2020/9/15,19,測(cè)控技術(shù)與儀器英語教程,confuse in use,confused effusiveness with affection. 把言語的吐露誤解為故意的炫耀 The old labels . . . confuse debate instead of clarifyin

14、g it “舊的標(biāo)簽不但無法澄清議題，反而使它更加模糊了”,2020/9/15,20,測(cè)控技術(shù)與儀器英語教程,range in dictionary,范圍：認(rèn)知、知識(shí)、經(jīng)驗(yàn)或能力方面的范圍 界限：活動(dòng)發(fā)生的地域或范圍 涵蓋的范圍：涉及的所有范圍 變動(dòng)的范圍：變化的數(shù)量或程度 階級(jí)，等級(jí)：階級(jí)、等級(jí)或次序,2020/9/15,21,測(cè)控技術(shù)與儀器英語教程,range in text,The total range of values which an instrument or measuring system is capable of measuring . 儀器或測(cè)量系統(tǒng)所能測(cè)量的整個(gè)范圍,2020/9/15,22,測(cè)控技術(shù)與儀器英語教程,range in use,within the range of possibilities. 在可能的最大范圍內(nèi) a wi