66results about How to "Reduce the impact of testing" patented technology

The invention discloses a test system of a mobile phone antenna. The test system comprises a test rotary table, a loudspeaker antenna, an integrative tester, a frequency spectrum tester, a signal distributor, a radiofrequency signal attenuator, a data acquisition apparatus and a display. The test rotary table and the loudspeaker antenna are positioned in a microwave darkroom. The integrative tester, the frequency spectrum tester, the signal distributor, the radiofrequency signal attenuator, the data acquisition apparatus and the display are positioned outside the microwave darkroom. A mobile phone is placed on the test rotary table and is connected with the signal distributor. The loudspeaker antenna and the integrative tester are connected with the frequency spectrum tester. The integrative tester is connected with the display through the data collector, and is connected with the signal distributor through the radiofrequency signal attenuator. The signal distributor is connected with the frequency spectrum tester. According to the invention, through forming a set of closed loop test system with the loudspeaker antenna, the integrative tester, the frequency spectrum tester, the radiofrequency signal attenuator and the signal distributor, influence of signal attenuation and radiation on a test is reduced, and a test result is accurate.

The invention relates to a device and a method for testing fabric contact coldness, and belongs to the field of textile engineering. The testing device consists of an outer cover, a test board, a sink, a fabric splint, a fabric surface temperature sensor and the like. The testing device of the invention has the advantages of reasonable structure, convenient use, small volume, low manufacturing cost and large-scale industrialized production; and the testing device adopts a platinum resistor with good stability and high precision as the temperature sensor, so the testing precision is improved. A cover hood made of an insulating material is arranged above a test platform so as to reduce the influence of the ambient environment on the test, reduce the heat loss caused by heat radiation of the fabric and improve the testing reliability. The testing device and the testing method of the invention overcome the defects of high technical requirement and high testing cost when testing the maximum transient heat flow Qmax of the fabric by the conventional method to evaluate the coldness of the fabric. The device and the method of the invention for testing the fabric contact coldness can be used in the field of contact coldness evaluation for the fabric.

The invention relates to a shock wave pressure testing structure used in an explosion near field and belongs to the field of explosion tests. The shock wave pressure test structure is a pressure sensor mounting structure and can be put in the explosion near field for a shock wave ground reflection pressure test. The structure comprises an end cover, an upper cover, a pressure sensor, a base, an adhering layer and thermal-insulation grease, wherein the pressure sensor is mounted on the upper cover, and the upper cover is fastened to the base through inner hexagon screws after the upper surface of the base is coated with the adhering layer; the end cover is then screwed to the upper cover, and the overall structure is buried in soil; finally, the end surface of the pressure sensor and the end surface of the upper cover are smeared with the thermal-insulation grease, and end surfaces of the ground, the end cover, the upper cover and the pressure sensor are flush after mounting is completed. The shock wave pressure testing structure is used for the shock wave ground reflection pressure test in the explosion near field, and can control the ratio of the spurious output to a crest value of a shock wave caused by vibration within 6% and solve the problem of abnormal signals caused by vibration, thereby effectively reducing influences on test results from seismic waves and base vibration.

The invention discloses a low-vibration and low-temperature magnetic field measurement device based on GM refrigerator cooling. The device is characterized by comprising a refrigerator cavity (6) withone refrigerating cavity gas inlet (30) and a refrigerating cavity liquid outlet (9) and one matched GM refrigerator (4), wherein the cold head of the GM refrigerator (4) is inserted into the refrigerator cavity (6), and the GM refrigerator (4) is connected with the upper edge of the refrigerator cavity (6) through a damping bellows (5) and is fixed on a support beam (56) through a refrigerator damper (53). The device can effectively reduce influence of vibration of the GM refrigerator on sample testing; and a sample testing cavity is connected with a low-temperature superconducting magnet through thermal-insulating rigid connection, a sample testing rod is connected with the sample testing cavity through a cavity flange, relative motion between a sample and the low-temperature superconducting magnet is avoided, and influences of vibration on testing are avoided.

The invention discloses a method and a system for testing receiver aging. The method comprises that an audio acquiring device records the audio received from a non-test terminal by a tested terminal in advance, the audio acquiring device plays the audio to the tested terminal through an audio power amplifying module subjected to amplifying gain calibration and a receiver of the tested terminal is subjected to the aging test. By the aid of the method and the system, the stability and the accuracy of the audio can be guaranteed.

The invention discloses a rocket engine micro-force measuring device comprising a fixed frame. A bearing pier and a small floatation displacement device are fixed on the fixed frame. A force adding device is connected to the bearing pier in a sliding manner. A force transmitting frame and an engine fixing unit are arranged at the small floatation displacement device. A force sensor 1 and a force sensor 2 are connected to the outer wall and the inner wall of one side of the force transmitting frame. A force transmission calibration frame is fixed on the force transmitting frame; one end of theforce transmission calibration frame is arranged in the force transmitting frame and the other end of the force transmission calibration frame is in transmission connection with the force adding device. The central lines of the force adding device, the force sensor 1, the force transmitting frame, the force transmission calibration frame and the force sensor 2 are arranged at the same straight line. According to the invention, the device is integrated with the test tooling, data acquisition and processing. When a vehicle is tested, the engine is fixed on the measuring device according to the required test state and thus real-time data are collected and analyzed; and under comparison with the design task book, the performance, precision, and reliability of the engine are evaluated and problems are found, so that the direction and approach are pointed out for improving the design.

The invention discloses a calibration method for an ultrahigh-frequency partial discharge online monitoring device in a field environment. Firstly, connection between a monitored sensor and a measurement host is kept, ultrahigh-frequency electromagnetic wave signals are injected to the monitored sensor through a signal generator, and the measurement host acquires measured response signals of the monitored online monitoring device; then, the injected ultrahigh-frequency electromagnetic wave signals are kept unchanged, electrical connection between the monitored sensor and the measurement host is cut off, a radio frequency cable is adopted to be connected with a measurement module with standard measurement, and standard response signals of the monitored sensor are acquired; and finally, through the standard response signals and the measured response signals, a calibration result is generated. According to the calibration method provided by the invention, the calibration efficiency is improved, the human errors are reduced, the confidence of calibration data is improved, and influences on the test by factors such as distribution parameters introduced by frequent wiring, the connection reliability degree and external interference can be reduced.

The invention relates to a power grid fault simulation test system movement detection device for a high-altitude photovoltaic power station. The movement detection device is of a vehicle-mounted container structure, is concentrated in three containers by adopting highly integrated design, the three containers are respectively a switch cabinet, a 35 kV electric reactor vehicle and a 10 kV electric reactor vehicle, each container is of a standard size, the transportation limitation requirements are met, and in addition, a centralized control vehicle carries a control system for totally controlling the whole device. The device can perform low voltage ride-through detection capability detection on the photovoltaic power station, can assist users in performing a wind power low voltage ride-through test, can finish switching of a wind power control system and a photovoltaic control system which are different, and is wide in coverage and high in adaptability.

The invention discloses a heavy-duty automobile electric control silicone oil clutch fan calibration method. The method comprises the following steps of 1, testing whether the water outlet temperatureof an engine exceeds the highest water outlet temperature allowed by engine design when the engine is under the limit load and a fan is at the limit rotating speed, and if so, replacing a fan with higher power; 2, recording the rotating speed corresponding to the fan when the water outlet temperature of the engine is maintained in the optimal use water temperature range under the conditions of constant rotating speed of the engine and different output powers of the engine; and 3, when a vehicle actually runs and the water temperature of the engine is changed within the optimal use water temperature range under the output power in the step 2, enabling the fan to run at the corresponding rotating speed measured in the step 2. On the premise of ensuring that the engine is not overheated under the limit load working condition, the engine under the common working condition of the whole vehicle is maintained within the optimal working water temperature, air temperature and engine oil temperature range, and meanwhile, the lowest working speed of the fan is ensured, so that the purposes of oil saving and noise reduction are achieved.

The system comprises a system and a method for testing an influence of an electric propulsion system for a satellite on modulation of a communication signal. The system comprises a control module, a wave control network module, a vector network analysis module, a spectrum analysis module, a data acquisition module, a transmitting antenna, a receiving antenna, a clock module and a current monitoring module. The vector network analysis module generates and transmits a radio frequency signal, the radio frequency signal is received by the receiving antenna after the radio frequency signal passes through plume fluid generated by electric propulsion, the radio frequency signal is transmitted to the vector network analysis module in order to obtain a time domain transmission coefficient, a wave control network is controlled based on the time domain transmission coefficient in order to reduce the environmental multi-path interference, and the frequency spectrum analysis module obtains a frequency spectrum of the radio frequency signal and a frequency spectrum of the modulated radio frequency signal; and the data acquisition module provides a current signal monitored by the current monitoring module to the control module. The control module carries out relation analysis on the spectral characteristics of a modulating signal and the frequency spectrum and the current of the transmittingradio frequency signal, so that the influence of the plume fluid generated in a working process of the electric propulsion system on the communication signal of the specific frequency of the satelliteis obtained.

The invention discloses a device and a method for testing dynamic contact kinetic parameters between a silk yarn package and a contact roller. The invention relates to the field of polyester filamentproduction equipment and mechanical dynamics. According to the testing device and method, in the rotating state, the dynamic contact rigidity and the contact damping value between a package and a contact roller are tested according to the mechanical dynamics principle. A spindle shaft package and a contact roller are driven by a servo motor to rotate, an air cylinder is adopted for pressurizing tokeep the contact roller in contact with the package and have certain contact pressure, an electric vibration table is adopted for providing system exciting force, vibration signals of the package andthe contact roller are tested respectively, and dynamic contact rigidity and contact damping are calculated and obtained. The dynamic contact stiffness and the contact damping value under different rotating speeds, different package diameters and different contact pressures can be accurately tested. The defects of inaccurate design parameters, access of analysis results and actual measurement andthe like caused by long-term use of static rigidity and damping and even use of estimated parameters to design a winding system are overcome.

Equipment for measuring volume deformation amount comprises the components of a water sleeve with an opening at one end, a sealing cover which can be movably fixed on the opening of the water sleeve, a liquid level gauge and a pump pressure joint, wherein the liquid level gauge and the pump pressure joint are arranged on the sealing cover. Through the sealing cover, the liquid level gauge and the pump pressure joint can be respectively communicated with the inner part of the water sleeve. Two ends of the pump pressure joint are provided with screw threads. Two ends of the pump pressure joint are respectively arranged at two sides of the sealing cover. One end of the pump pressure joint is communicated with inflating equipment, and the other end is communicated with a to-be-measured air cylinder in the water sleeve. The bottom of the inner wall of the water sleeve is provided with a spacing ring. The equipment has advantages of realizing simple structure, reducing measurement cost, improving efficiency and accuracy in measuring volume deformation, and realizing accurate reading of full volume deformation and volume residual deformation through one-time measurement.

The invention discloses a rock porosity measuring method which comprises the following steps: putting a comparison object and a rock sample to be measured with equal apparent volumes into a comparisonpressure container and a sample pressure container with equal volumes, inflating gas into the sample pressure container by adopting target pressure, and inflating gas into the comparison pressure container by adopting the same target pressure, and measuring the pressure difference between the sample pressure container and the comparison pressure container by using a differential pressure gauge, discharging the gas in the comparison pressure container until the pressure in the two containers is balanced, and calculating the porosity of the rock sample to be measured according to the volume ofthe discharged gas. The method ensures the experiment accuracy, and is high in precision and reliable in experiment result. The invention further discloses a measuring device based on the method.

The invention discloses an electrochemical high-flux testing method based on a photolithographic mask and a micro liquid tank and a device and relates to the technical field of metal corrosion, microcell electrochemistry and systematic data accumulation application. The device comprises a micro liquid tank testing system, a testing liquid updating system, a high-precision XYZ three-dimensional moving platform, a microscopic monitoring system, an electrochemical testing system, a storage and control system and a connection system, wherein the connection system is used for controlling instructions and testing data to be effectively transmitted among the systems. Due to modular design, the device is high in expandability; with the combination of a photolithographic mask technique and the micro liquid tank testing system, and a high-flux idea, the reaction area of a working electrode is precisely controlled, a high solution amount/working electrode reaction area ratio is achieved, influence of reaction products is reduced, seam corrosion is eliminated, risks of liquid leakage, blocking and oxygen diffusion are reduced, relatively low solution resistance is achieved, mask graphs and micro-tube sizes can be selected according to demands, high-flux and automatic measurement on microcell electrochemistry are achieved, and the measurement and analysis efficiency are improved.

The embodiment of the invention, which belongs to the technical field of laser, relates to a high-power laser light source continuous stability testing system and method. The system comprises a lasergeneration device, a focusing lens, a light attenuation device, and a detection device. The laser generation device is used for generating a laser light source; the focusing lens is arranged on an output light path of the laser generation device and is used for focusing laser beams generated by the laser generation device; the light attenuation device receives the focused laser beam and carries out attenuation on at least two paths of the laser beam, so that the detection device is used for receiving the attenuated laser beams. Therefore, the detection device can be effectively protected, thedetection surface of the detection device is prevented from being burnt out, the aging degree of the detection device is reduced, the maintenance cost of the detection device is lowered, the loss costfor testing and detecting high-power laser light source equipment is reduced, and the accuracy of data is ensured, so that a reliable scientific basis is provided for developing a high-power laser light source system.

The invention relates to the technical field of mechanical property test devices, in particular to a device and a method for testing the adhesive property of fiber reinforced composite reinforced concrete. The device comprises an installation support and a balance box, a movable platform and a fixed platform are sequentially installed on the installation support from bottom to top, the movable platform extends outwards to form an impact part, and a first storage space used for storing a first test block and a second storage space used for storing a second test block are formed in the movable platform and the fixed platform respectively; the balance box is connected with the movable platform through a connecting piece, a balance weight is arranged in the balance box, and the connecting piece bypasses the top of the installation support, so that the balance box and the movable platform are located on the two sides of the installation support. Accurate energy consumed by fracture of a fiber reinforced composite material sheet can be obtained by measuring the difference between the energy of an impact piece impacting the movable platform and the energy of the movable platform, the first test block and the impact piece after the connection interface is fractured.

The invention discloses a viscosity detection sensor based on double piezoelectric coupling and belongs to the technical field of viscosity detection. The viscosity detection sensor is characterized in that a piezoelectric quartz crystal is fastened in a clamping position in a supporting seat; a mechanical vibration conducting column is cemented between an output unit and a feedback unit; the output unit and the feedback unit are arranged in an insulation clamping position on the supporting seat on which the piezoelectric quartz crystal is fastened; fixing holes for a screw to penetrate through are formed in a mounting supporting and positioning gland and a mounting supporting and positioning base; the mounting supporting and positioning base is provided with a clamping position for mounting an elastic member; the elastic member is pressed into the mounting supporting and positioning base by the mounting supporting and positioning gland; the mounting supporting and positioning gland is fastened with the mounting supporting and positioning base. The viscosity detection sensor has the beneficial effects that a piezoelectric quartz crystal fastener is reasonably distributed, so that directional flowing of air is facilitated and the influence of air current on inspection is reduced; in addition, the piezoelectric quartz crystal fastener has insulating and electromagnetic shielding functions, and the influence of objective factors on a test result is eliminated. According to the viscosity detection sensor disclosed by the invention, a circular elastic member is designed, so that the aseismic function of the system is enhanced, mechanical vibration is reduced to the maximum extent, and the influence of outside on the test result is reduced.

The invention discloses a method for determining water quality phenolic compounds, and relates to the field of water quality detection. The method comprises the following steps of: step 1, collectinga sufficient amount of water sample by a glass bottle; step 2, immediately adding a reducing agent and an appropriate amount of hydrochloric acid to adjust the pH<2, after the water sample is collected; step 3, pouring the collected water sample into a separatory funnel; step 4, extracting target compounds to obtain an organic phase extract, and dehydrating the organic phase extracted with anhydrous sodium sulfate; step 6. concentrating and performing constant volume on the organic phase extract, and detecting by a machine to obtain a sample spectrum; step 7, comparing the sample spectrum witha standard spectrum, finding out the peak position of each target compound, and calculating a rho standard in combination with a calibration curve; and step 8, calculating the concentration rho i ofthe target compound in the water sample according to the formula rho i = rho standard x V1 x 1000/V2. The probability of oxidation of the phenolic compounds is effectively reduced, and the detection accuracy is improved since the water sample is added with the reducing agent in the pretreatment.

The invention discloses a preparation method of a P-doped CuMnCoO4/N-CNs composite material, which comprises the following steps: drying shrimp shells, grinding, carrying out hydrothermal treatment toobtain nitrogen-doped carbon quantum dots (N-CNs), dissolving Cu salt, Mn salt and Co salt in deionized water, adding N-CNs and ammonium dihydrogen phosphate, carrying out hydrothermal treatment, andcalcining to obtain the P-doped CuMnCoO4/N-CNs composite material. The prepared P-doped CuMnCoO4/NCNs composite material is applied to an electrocatalytic oxygen reduction reaction.

The invention discloses an indoor adjusting device for unmanned aerial vehicle flight testing, and belongs to the field of unmanned aerial vehicle flight testing, and the indoor adjusting device comprises a base stand, the edge of the top end of the base stand is fixedly connected with a hinge seat, the two sides of the hinge seat are rotatably connected with connecting movable joints, and the tail ends of the connecting movable joints are fixedly connected with wind measuring cover plates. The side face of the wind measuring cover plate is fixedly connected with an airflow fan, the top face of the base stand is fixedly connected with a supporting rod, the top end of the supporting rod is fixedly connected with a rod fixing end, and the side face of the rod fixing end is fixedly connected with a track ring. The device is simple in structure and small in occupied space area, plays a role in protecting the unmanned aerial vehicle, can simulate and test the flight balance of the unmanned aerial vehicle when the unmanned aerial vehicle is influenced by wind power in a real environment, and is convenient for accurately adjusting the unmanned aerial vehicle and exerting the performance of the unmanned aerial vehicle through data obtained by testing.