37results about How to "Eliminate the effects of testing" patented technology

The invention relates to a weak fiber grating reflectivity measurement method and belongs tot he technical field of spectral measurement. The method particularly includes arranging a fiber grating to be measured in a low reflectivity fiber grating reflectivity test system, cleaning a UPC type fiber joint of the fiber grating to be measured clearly, arranging the fiber joint into medium 1, and acquiring the reflection spectrum of the fiber grating to be measured; maintaining the fixation of the system, cleaning the UPC type fiber joint clearly and rapidly before arranging into medium 2, and acquiring the reflection spectrum of the fiber grating to be measured once again; finally, utilizing the peaks of the reflection spectrum to calculate the weak fiber grating reflectivity. According to the method, the double reflection spectrum is acquired to calculate the weak fiber grating reflectivity, influence on measurement by the fiber end surface and fiber joint is eliminated, the problem of light source power vibration is reduced greatly, and the requirement of accurate weak fiber grating reflectivity measurement can be met.

The invention provides a method for testing a fiber-optic gyroscope resolution ratio. According to the method, firstly a speed rotary table is adjusted, then a fiber-optic gyroscope is mounted, and finally the fiber-optic gyroscope is tested. On the basis of a conventional speed rotary table, through the improvement of a test method, the influence of an earth rotation horizontal component on test of the fiber-optic gyroscope resolution ratio is effectively eliminated, so that a low-accuracy rotary table can precisely measure the resolution ratio of the high-accuracy fiber-optic gyroscope.

The invention belongs to a laser application technology, and relates to a photoelectric receiver time stability test method based on acousto-optical amplitude modulation. The method includes using a single-frequency laser as a light source, outputting an amplitude-adjustable double-frequency laser after the single-frequency laser passes an acousto-optical modulator, utilizing a non-polarized beam splitting prism for beam splitting, and testing phase difference between a to-be-tested photoelectric receiver and a reference photoelectric receiver. The method has the advantages that in testing, linearly polarized light with the frequencies of v1 and v2 in a reference light beam is transmitted in a coaxial identical-optical-path mode, and linearly polarized light with the frequencies of v1 and v2 in a measurement light beam is transmitted in a coaxial identical-optical-path mode; phases of the two light beams are unaffected by external environmental changes, extra phase errors are not introduced, and test accuracy is high; time stability of photoelectric receivers in different light intensities can be tested by means of adjusting light intensity of the double-frequency laser.

The invention provides a force effect tester. The force effect tester comprises a base, slide guide rails which are symmetrically arranged on the base, a slide end which is fixed on the slide guide rails, a motor mounting rack which is fixed at the slide end, and a tensile force tester which is connected with the slide end, wherein a test circuit board with an onboard master control single chip microcomputer is arranged on the motor mounting rack; the single chip microcomputer is used for testing integral voltage and current through a sensor with a power supply plate, reading results of the tensile force tester, calculating the force effect by combining various results according to the set program, and displaying and recording the force effect on the single chip microcomputer and a display device thereof; the test circuit board 5 further can be connected with a remote-control receiver to supply power to the receiver, and a control signal of the receiver can be connected to control power transfer.

The invention relates to a cold rolled auxiliary agent, concretely relates to a method for detecting the quality of a cold rolled degreasing agent. The method for measuring phosphor content in the cold rolled degreasing agent comprises the following steps: weighting 2.0000g sample degreasing agent in a teflon beaker, adding a few pure water, adding dilute nitric acid for regulating the pH value of 4-9; adding 2-5 milliliters nitric acid with volume ratio of 1:1, degrading on an electric furnace; slowly adding 2-8 milliliters hydrogen peroxide after boiling, keeping the slight boiling state for 10 minutes; transferring a digestion solution in a volumetric flask, controlling 0.5-2% of nitric acid medium, diluting by using water to scale, uniformly sharking to obtain the sample to be measured; injecting the sample in a ICP quartz tube, determining optical radiation intensity generated under the 213.618nm detection wavelength of ground state atom of phosphor by a plasma spectra method, thereby the phosphor content in the degreasing agent sample can be quantified. The determination method of the phosphor content has strong anti-interference capability, and is especially suitable for detecting complex matrix of degreasing agent and the like.

The invention relates to a dynamic test device and method for cement-based material deformation in the thermal curing process, and belongs to the technical field of civil engineering material testing.The test device comprises a controllable water bath heating system, a design mold system, a deformation measurement system, an optimized data collection and analysis and processing program and the like. The test method comprises the steps that 1, the controllable water bath heating system is installed, and heating parameters are set; 2, the design mold system is installed, and to-be-tested cementis poured and vibrated in a mold; 3, the deformation measurement system is installed, a sensor is connected with the measurement system, and the sensor is calibrated; 4, data collection is conductedsimultaneously; 5, by means of the data analysis and processing program, the cement-based material deformation situation is analyzed in real time. Automatic collection and data analysis of deformationof cement-based materials under the early thermal curing condition are achieved, and the device and method can be suitable for parsing and presenting the cement-based material deformation rules in the thermal curing unsteady-state process.

The invention relates to a method for testing the fault of the internal motor of a compressor. The method comprises the following steps that: a motor rotor position is calculated; the motor rotor position is compensated through a compensation algorithm; the waveform diagram of a to-be-tested motor is generated based on the compensated motor rotor position; the waveform of the coil of the to-be-tested motor is displayed, the test waveform is compared with a standard waveform; and a motor fault condition is judged according to a waveform comparison result. The invention further discloses a device for testing the fault of the internal motor of a compressor. With the method and device of the invention adopted, the fault condition of the internal motor can be obtained with destructive measurement not need to be performed on the compressor.

The invention belongs to a laser application technology, and relates to a photoelectric receiver temperature coefficient test method based on double-acousto-optical frequency shift. The method includes using a single-frequency laser as a light source, outputting a double-frequency laser beam after the single-frequency laser passes a double-acousto-optical frequency shifter, utilizing a non-polarized beam splitting prism for beam splitting, and testing phase difference between a to-be-tested photoelectric receiver and a reference photoelectric receiver at different temperatures to obtain temperature coefficient of the to-be-tested photoelectric receiver. The method has the advantages that phases of a reference beam and a measurement beam are unaffected by external environment changes in testing, extra phase errors are not introduced, test accuracy is high, and the temperature coefficient of photoelectric receivers in different frequencies can be tested by means of adjusting light frequency of the double-frequency laser.

The invention belongs to a laser application technology, and relates to a photoelectric receiver temperature coefficient test method based on acousto-optical amplitude modulation. The method includes using a single-frequency laser as a light source, outputting an amplitude-adjustable double-frequency laser after the single-frequency laser passes an acousto-optical modulator, utilizing a non-polarized beam splitting prism for beam splitting, and testing phase difference between a to-be-tested photoelectric receiver and a reference photoelectric receiver at different temperatures to obtain temperature coefficient of the to-be-tested photoelectric receiver. Phases of a reference light beam and a measurement light beam are unaffected by external environment changes in testing, extra phase errors are not introduced, test accuracy is high, and the temperature coefficient of photoelectric receivers in different light intensities can be tested by means of adjusting light intensity of the double-frequency laser.

The invention discLoses a device for measuring underground water LeveL by adopting an opening cLosed method. The device comprises verticaLLy arranged outer and inner pipes and a steeL ruLer settLementgauge, wherein a cLosed annuLar space is formed between the outer pipe and the inner pipe, a magnetic fLoater is arranged in the annuLar space, the outer pipe is a corrugated teLescopic pipe providedwith a steeL wire, the inner pipe consists of an upper-portion main pipe and a Lower-portion Limiting guide pipe, the upper end of the Lower-portion Limiting guide pipe is provided with a measuring top cap, the upper-portion main pipe is inserted into the Lower-portion Limiting guide pipe, the Lower end is seaLed, the upper end of the outer pipe is seaLingLy connected with seaLing fiLm, a side waLL is provided with water seeping hoLes, the upper end of the outer pipe is connected with a seaLing top cap, and a measuring head of the steeL ruLer settLement gauge is arranged in the upper-portionmain pipe. The invention aLso discLoses a method appLying the device to measure the underground water LeveL. The reLativeLy accurate underground water LeveL eLevation of a soft soiL foundation in thereinforcing process can be more simpLy and convenientLy obtained under the situation that the soiL Layer soLidification infLuence is considered and it is ensured that a water LeveL pipe is not communicated with the atmosphere.

A chemical adsorption instrument with a function of removing residual gas in a pipeline through vacuumizing is characterized in that a first gas source is connected with an inlet of a first stop valve through a pipeline, a second gas source is connected with an inlet of a second stop valve through a pipeline, and outlets of the first stop valve and the second stop valve are connected with an inlet of a flow controller through pipelines; an outlet of the flow controller is connected with an inlet of the U-shaped sample pipe through a pipeline, an outlet of the U-shaped sample pipe is connected with an inlet of the detector through a pipeline, the inlet of the detector is connected with an inlet of the two-position three-way valve through a pipeline, and two outlets of the two-position three-way valve are connected with the vacuum pump and the exhaust pipe respectively. The whole gas path system is vacuumized through the vacuum pump, so that the influence of residual gas in dead volume of a pipeline on the test can be eliminated; meanwhile, the sample is subjected to activation pretreatment in a heating and vacuumizing manner, so that the activation efficiency can be improved, and the surface cleanliness of the sample is higher.

The invention belongs to a laser application technology, and relates to a photoelectric receiver time stability test method based on non-polarized beam splitting of a dual-frequency laser. The method includes using the dual-frequency laser as a light source, utilizing a non-polarized beam splitting prism for beam splitting, and testing phase difference between a to-be-tested photoelectric receiver and a reference photoelectric receiver. The method has the advantages that in testing, linearly polarized light with the frequencies of v1 and v2 in a reference light beam is transmitted in a coaxial identical-optical-path mode, and linearly polarized light with the frequencies of v1 and v2 in a measurement light beam is transmitted in a coaxial identical-optical-path mode; phases of the two light beams are unaffected by external environmental changes, extra phase errors are not introduced, and test accuracy is high.