电测2(国外英文资料).docVIP

电测2(国外英文资料) Exercises Chapter 1 exercise 1-1. what is measurement? What does the measurement result mean? 1-2. what is truth value? Can you get truth in measurements? Why? 1-3. briefly describes the sources, classifications and common expressions of measurement errors. 1-4.QS18A type AC bridge inductance measurement technical indicators are as follows: 100 H to 1.1H range file: + 1 (indication) + 0.001H; 1H to 11H range file: + 2 (indication) + 0.1 full value. 1. if the measured inductance values are 0.1H, 1H, 2H and 10H, the absolute error and relative error are tested; 2., the measurement is evaluated according to the calculation results. 1-5. distinguishes between the two concepts of error and correction value, and points out their significance in measurement. 1-6. measures the voltage between the A and the B 1 points in the graphical circuit by using a voltmeter with an internal resistance of Rv. UAB. Set R1, R2, R2, Rv, ignore the voltage 2 table level error condition, ask: 1. measurement of actual relative error and indication relative error is each how much? 2. explain the cause of the error and the nature of the error. Question 1-6 diagram 1-7. want to measure the voltage of about 10V, there are two tables at hand, one meter range 150V, 0.5; another meter range 15V, 2.5, ask which table measurement is more appropriate 1-8. what are the system errors and random errors of measurement? Why are they related to accuracy, precision, accuracy? What are the differences between the 1-9. constant system and the variable system? What impact do they have on the data processing of random errors? What are the characteristics of random errors in which 1-10. obeys normal distribution? What is the significance of standards? 1-11. for normally distributed random errors, find out the following to the probability interval: 1.P-2 = = - 2.P-2 = zeta zeta zeta = 3.P = 3 1-12. what is the limit error (random uncertainty)? What is the condition of taking the measure of + 3 Sigma as