Combined with the Interpolation method, the range of measurement is expanded to 200ns ~43s.
some verification experiments have been performed using the whole temperature control system. The results of experiment mdicate that within the temperature range of 10 ℃~40℃, the resolution of the temperature measurement is 0.01℃, and the accuracy of temperature control is 0.2 ℃ (or even 0.1 ℃ at the room temperature,) and the establishing time is about 180 seconds.
The precise measurement is required for the large system with complicated influence factors, so the beam quality characterization must be researched specially and the measurement must find some non-related methods to verify the accuracy at the same time.
the influence of the fluctuation of the light source and the differences of the absorption for different wavelengths of the sample is reduced to its minimum value. The accuracy of the measurement is 10-5.
According to the simulation result with computer—aided design software, the integrated circuit is fabricated using Duriod5880 with 0.254mm thick and dielectric constant ε_r of 2.22 .The result in measurement is that the range of the conversion loss is from 12.5dB to 16.2dB when the IF changes from 100MHz to 1000MHz, and the mixer can meet the requirement of the system in application.
An effective approach combining theoretical analysis and mathematical calculations with experimental measurement is presented in this paper to determine the grinding area and allowance for compensating the boresight error performance of the radome.
Compared with the method via non-modulated electron beams, the instrument of measurement is simplified.
It is predicted that the superposition persistence time will increase if the measurement is carried out with a low accuracy and a minimum variance.
A method of SEM linear measurement is proposed in which the reference marker displayed on the screen is used as a standard.
The sensitivity of this method can be high because frequency measurement is one of the most accurate measurements in physics and metrology.
An improvement of the measurement of the directivity of the directional coupler by the sliding short-circuit plunger method is presented. The measurement is carried out at any reflection coefficient of the practical microwave signal source, thus eliminating the mismatch. The method can be used for measuring the voltage standing-wave ratio and tuning match of the microwave signal source quickly.
In this paper, the scheme of cable transmission system in airborne DATA BUS is analysed and discussed. According to the principle of mimimum transmission error, the diagram computation formula and waveform are given, the method of performance measurement is illustrated too.
The phase distribution of laser fields is measured by displacement process. The precision of measurement is within 1.5°. This method is also available for undontact measurement of precision optical elements.