211results about How to "Avoid test error" patented technology

The invention relates to the technical field of bearing testing, in particular to a bearing integrated dynamic performance test device and method. The bearing integrated dynamic performance test device comprises a drive system, a transmission system, a measurement and control system, an environmental simulation system and a mechanical body structure. A motor is adopted by the drive system for driving. The measurement and control system controls the rotation speed of the motor. The transmission system is in a belt transmission mode or a coupler transmission mode. The measurement and control system is provided with a force sensor, a strainmeter, an eddy current transducer, a rotation speed sensor, a laser displacement sensor, a temperature sensor, a magnetic oil residue sensor, a pressure sensor, a flow sensor, an oil temperature sensor, an acceleration sensor and other related sensors used for bearing testing. The control system is driven in a servo mode, and is composed of a frequency converter, a hydraulic solenoid valve, a heating controller, a flow control device and a pressure control device. The environmental simulation system is adopted for simulating a real bearing testing working condition, and the performance and service life testing of the real bearing testing working condition is achieved.

The invention relates to a novel shale gas content tester and a shale gas content detecting method. The novel shale gas content tester comprises a device, a real-time testing system, a system and a computer collecting and processing system, wherein the device is used for desorbing a sample at a constant temperature; the real-time testing system is used for testing pressure and temperature of the sample in the desorbing process; the system is used for detecting the volume of a sample desorbing space; through a pipeline, the device for desorbing the sample at the constant temperature is connected with the real-time testing system for testing the pressure and the temperature of the sample in the desorbing process; through a pipeline, the real-time testing system for testing the pressure and the temperature of the sample in the desorbing process is connected with the system for detecting the volume of the sample desorbing space; and the real-time testing system for testing the pressure and the temperature of the sample in the desorbing process and the system for detecting the volume of the sample desorbing space are connected with the computer collecting and processing system through data wires. According to the invention, the sample is placed in the constant temperature desorbing and detecting system to detect desorption, the problem that the measurement of desorbed gas is affected because the gas of a free space can be changed with temperature and pressure conditions of a testing environment is solved.

The invention provides a coal seam outburst danger testing while drilling method and device. The coal seam outburst danger testing while drilling method and device are applicable to outburst danger predication, methane gas extraction and exploitation effect evaluation and the like. By drilling a coal seam and testing methane gas parameters while drilling, lithology and coal seam information while drilling in real time, a test while drilling and grounding of the coal seam outburst danger is achieved. The device comprises a cabin body, a pressure sensor, a temperature sensor, a flow sensor, an electromagnetism sensor, an ultrasonic wave sensor, a wave velocity testing module, a monitoring control module, a power source module and a communication module and is installed between a drill and an inclinometer while drilling or a first drill rod. In the period when the coal seam is drilled or drilling is stopped for replacing the drill, the gas pressure, the temperature, the flow speed, the coal body wave velocity, the electromagnetic radiation and an ultrasonic wave signal on a testing point can be monitored and recorded in real time, and the methane gas pressure, the methane gas content, the initial desorbed methane gas content, the medium lithology, the wave speed, the coal body stress and the coal seam outburst danger on the testing point are analyzed and calculated. The coal seam outburst danger testing while drilling method and device have the advantages of being free of sampling tests and achieving testing while drilling and grounding, multi-parameter synchronous comprehensive evaluation and the like.

Using geometric characteristics of outer margin curves of two light spots at different distances along direction of beam transmission, the disclosed method obtains divergence angle of laser. Through rotational scanning detection, concentric placed two light detectors perpendicular to each other obtain outer margin curves. Multiple optical fibers are distributed on the said light detector evenly. The disclosed device is composed of drive power supply, cooling water platform, cooling water circulation system, 4D traveling platform, electrical motor set, drive, data acquisition module, and PC etc. The light-receiving module includes light detectors. The light-receiving module, data acquisition module, and PC are connected electrically. The invention solves issue of test error caused by regarding face radiation of area array laser as spot light source so as to avoid damaging and burning detector caused by too large power of laser. Advantages are: accurate and reliable.

The invention relates to a system and a method for synchronously acquiring load and response signals of a machine tool vibration test. The system comprises four parts, namely an excitation subsystem, a response signal acquisition subsystem, a data acquisition front end and a data processor, wherein the excitation subsystem comprises a power amplifier, a vibration exciter and a vibration exciting rod; the response signal acquisition subsystem comprises a force sensor, multiple acceleration sensors and multiple charge amplifiers; the input end of the data acquisition front end is connected with the response signal acquisition subsystem; one output end of the data acquisition front end is connected with the excitation subsystem, and the other output end of the data acquisition front end is connected with the input end of the data processor; and the data processor prestores a program for performing data processing on the load and response signals. The test system can be used for avoiding measurement errors caused by signal delay, filtering out errors in acceleration signals, and accurately analyzing the dynamic vibration response of each part and the complete machine of a machine tool, and has the advantages that the test is accurate, the operation is simple and the like.

Provided is an ultrasonic-wave stress detection device capable of adjusting an acoustic beam angle and a test area. The detection device comprises a center positioning bench (100). Parallel guide rail racks (200) are fixed on opposite side faces of the center positioning bench (100) and are slidably connected with a glass pedestal (300). A U-type groove rail (310) with a protruding arc guide rail face (311) is arranged on the upper part of the glass pedestal (300). A probe fixing wedge (400) is slidably connected with the side wall of the U-type groove rail (310). The recessed arc face of the probe fixing wedge (400) cooperates with the protruding arc guide rail face (311) of the U-type groove rail (310). A probe fixing cavity (500) used for fixing an ultrasonic-wave probe is arranged on the upper part of the probe fixing cavity (500). According to the invention, adjustment and correction of first critical angles of a welded seam and of a heat affected zone and residual stress tests for different kinds of materials can be achieved; and residual stress tests of to-be-tested workpieces in different areas of regions can be achieved.

The invention discloses an ultralow-temperature and ultralow-vibration friction testing device, which comprises a helium liquefying mechanism, a friction mechanism and a storage tank, wherein the helium liquefying mechanism comprises a first vacuum hood and a first cold shield arranged in the first vacuum hood; a refrigerator penetrates through the first vacuum hood; a first-level heat exchanger and a second-level heat exchanger connected with a liquid conveying pipe are arranged on the refrigerator; the first-level heat exchanger and the second-level heat exchanger are positioned in the firstcold shield; the friction mechanism comprises a second vacuum hood, a second cold shield and an insulating bracket; the second cold shield and the insulating bracket are arranged in the second vacuumhood; the second vacuum hood is connected below the first vacuum hood; a liquid helium cavity is formed in the second cold shield; an exit of the liquid conveying pipe is formed in the liquid heliumcavity; an upper sample support is arranged on the outer bottom wall of the second cold shield; a movable displacement platform is arranged on the insulating bracket; a lower sample support is arranged on the displacement platform; the upper sample support and the lower sample support face each other up and down; the storage tank is connected with the first-level heat exchanger through a gas supplementing pipe and connected with the liquid helium cavity through a gas return pipe. According to the invention, a friction test of a sample can be realized in an environment with ultrahigh vacuum degree and ultralow temperature.

The invention relates to a shale gas content comprehensive analysis device. The device comprises a gas content test unit, a hydrocarbon gas component analysis unit, an inorganic gas component analysisunit, and an operation control unit. The invention further discloses a shale gas content comprehensive analysis method based on the device. The technical scheme for resolving gas component and the change thereof in the online analysis and monitoring resolution process is realized when performing the gas content resolution test on the shale core at a shale gas drilling field by using the technicalscheme disclosed by the invention, the reliability and the instantaneity of the test data can be effectively improved, so that the test data can preferably serve the shale gas exploration and development engineering implementation, and provide more scientific and more reliable gas content data for the shale gas resource exploration and assessment.

The invention discloses a volume expansion and shrinking percentage testing device and method. The device comprises a body and a cover body, wherein the body is used for containing a cement sample to be tested and provided with an opening end and a closed base back on to the opening end, the cover body is used for sealing the opening end, and a closed containing cavity is formed after the cover body and the body are matched in a sealed mode. The cover body is provided with an injection hole for inputting liquid into the containing cavity and a graduated tube communicated with the containing cavity, wherein the injection hole is provided with a detachable sealing mechanism; the graduated tube is provided with a first end and a second end opposite to the first end, the first end is communicated with the containing cavity, the second end is an opening end, and scale marks are arranged on the surface of the graduated tube. The volume expansion and shrinking percentage testing device and method are capable of accurately measuring the volume expansion and shrinking percentage, and the testing device is simple in structure and convenient to operate.

The embodiment of the invention discloses a server stress testing method which comprises the following steps that (1) a test sample queue reads multiple preset test request samples, wherein each of the test request samples carries different resource identifies of a tested server, (2) multiple concurrent threads extract different request samples from the sample request queue and sends testing requests to the tested server according to the extracted test request samples, (3) the multiple concurrent threads obtain the testing results of the testing requests and associate the testing results and the resource identifies of the tested server and stores the testing results. The embodiment of the invention also discloses a server stress testing device. By using the server stress testing method and the server stress testing device, the detailed testing result of the stress test of the server can be obtained.

The invention discloses an LED (Light Emitting Diode) performance test box, a calibrating method and a performance test method. The test case comprises a box body and a light taking device, and also comprises a first motor, a second motor, a rotating shaft, an optical fiber and a connecting piece, wherein the box body is provided with a through hole, and the rotating shaft and the optical fiber pass through the through hole; the light taking device is arranged inside the box body; the first motor arranged outside the box body drives the rotating shaft to rotate; the fixing piece is fixed at the end of the rotating shaft located inside the box body, and the second motor is fixed on the connecting piece; the second motor drives the light taking device to approach or move away from the rotating shaft; and a first end of the optical fiber is connected with the light taking device, and a second end of the optical fiber is outside the box body. The LED performance test box is simple in structure, and easy and simple to operate, and can detect LED performance parameters on line.

The invention discloses a method and a device for testing the laser absorptivity of a powdery material, wherein the testing method mainly comprises the steps of drying powder, cleaning a heat transfer body (a sample table surface), coating a heat conduction silicone grease, laying the to-be-tested powder and testing the laser absorptivity, and the device mainly comprises a laser (1), a spectroscope (2), the heat transfer body (5), an insulating box body (6), a water containing box body (8), a laser power meter (9), temperature sensors (10 and 11), A/D converters (12 and 13), a singlechip (14) and a computer (15). The invention provides the method and the device for testing the laser absorptivity of the powdery material, so that the limitation that the present laser absorptivity is only applicable to a block material or a thin film on the block material is broken through and a foundation for pushing the theoretical research development and engineering practical application of the powder laser cladding technology is laid, and meanwhile, the method and the device have the characteristics of high testing precision, simplicity, feasibility, good generality and the like.

The invention relates to the 10-gigabit Ethernet communication test technology, discloses a system and method for testing 10-gigabit electrical signals and solves the problems of not high test precision, incomprehensive test and high cost in the prior art. The test system comprises a testes device, a test clamp and an oscilloscope. The testes device is connected with the test clamp through a 10-gigabit cable; and the test clamp is connected with a channel of the oscilloscope through a test coaxial cable. Besides, the invention also provides the method for testing the 10-gigabit electrical signals, and the method is suitable for testing the 10-gigabit electrical signals obtained through cable connection.

The double light beam detection and modulation device based on surface plasma wave sensing has laser, optical assembly to split the laser beam into the first polarized light beam and the second polarized light beam, prism with vaporization coated Au film, grown biosensitive film and pond for the measured sample to flow in to total reflect the incident two light beams, and the first PD detector and the second PD detector to receive these two reflected light beams separately. The present invention has the characteristic of surface plasma resonance (SPR) sensing technology maintained, and the double light beam SPR sensors, which need no precise scanning incident angle and thus simplified angle regulating mechanism, less measurement error and increased operation performance. The detection of double light beam light strength signal may be completed with cheap photodiode, and this can simplify the system, lower the manufacture cost and make the instrument portable.

The invention relates to battery pick-out equipment for a hot-spot test of photovoltaic components. The battery pick-out equipment comprises a machine frame and is characterized in that baffle guide rails and photovoltaic component guide rails are mounted on a machine frame, a photovoltaic component support frame is mounted on the photovoltaic component guide rails and can move along the photovoltaic component guide rails; steady-state light sources and a plurality of light sources in array distribution are mounted on the machine frame above the photovoltaic component support frame; one or more group of baffle components are mounted between the steady-state light sources and the photovoltaic component support frame; the baffle components comprise baffle supports of which the two ends are arranged on the baffle guide rails, and the baffle supports can move along the baffle guide rails; a plurality of baffles capable of shielding the steady-state light sources are arranged on the baffle supports; a space for placing photovoltaic components is formed between the baffles and the photovoltaic component support frame; and a data acquisition circuit is mounted at one end of the machine frame. The battery pick-out equipment only requires measurement of the reverse dark-state leakage current of batteries, and can achieve multi-way monitoring at the same time, thereby greatly speeding up the test.

The invention provides a method for detecting air conditioner refrigerant leakage and an air conditioner. The method comprises the following steps: S1, detecting the fault condition of a compressor before the air conditioner is started; and if the compressor operates normally, executing the step S2; S2, starting the air conditioner to operate, and judging refrigerant leakage conditions in advancethrough refrigerant pressure; and if the pre-judgment result is to be determined, executing the step S3; and S3, calculating the refrigerant remain and further judging the refrigerant leakage conditions. The method for detecting the air conditioner refrigerant leakage and the air conditioner have the advantages of high detection precision and low misjudgment rate.

The invention discloses a micro-tensile bonding strength testing fixture for a dental bonding agent. The front portion of a connecting shaft is provided with a guide rod, and the side face of the back portion of the connecting shaft is provided with a bolt hole; an upper slide block and a lower slide block sliding along the guide rod are fixedly connected to the guide rod; a rigid pull rod is fixedly connected to the upper portion of the upper slide block; the central lines of the upper and lower slide blocks are provided with sample limiting grooves. The micro-tensile bonding strength testing fixture has the advantages that the connecting shaft of a universal test is used together with the universal test, thereby greatly reducing the cost of separate use of a micro-tensile tester and expanding the function of the universal tester; a bonded article is compressed through dual nuts and a gasket without bonding the bonded article on a test table by using the bonding agent; during cutting of a bonded sample, the bonding surface is kept flat, and the strain defect during cutting of the bonded sample can be avoided by directly cutting the bonded sample into small pieces as required; the testing fixture is stable in clamping, convenience in use, simple in structure, and very low in cost; by adopting the guide rod, the bonding strength test result is more accurate.