99results about How to "Eliminate test errors" patented technology

The invention discloses an apparatus and method for testing contact resistance of a conductive slip ring automatically. A low-resistance tester is arranged outside the apparatus. The apparatus comprises a conductive slip ring, a plurality of relays, a relay drive circuit, an automatic control device, and a plurality of leads. The number N of the relays is twice the number M of channels of the conductive slip ring; the N relays are connected with all M channels of the conductive slip ring to form switching of 2N testing channels; each four adjacent relays complete switching of two four-wire measurement channels. The output terminal of the relay drive circuit is connected with the relays and the input terminal is connected with the automatic control device. According to the invention, with the simple relay switching circuit, rapid testing of contact resistances of multiple paths can be realized; and the individual test error can be eliminated.

The invention discloses a multifunctional solid material thermophysical property testing device and method. The device comprises a hot end compression plate and a cold end compression plate connected together through a compression device, wherein the hot end compression plate is in contact with a hot end sealing plate, the hot end sealing plate is connected with a heating plate through an elastic module, and the heating plate is fixed on a hot end base; a seal pipe is arranged between the hot end sealing plate and a cold end base, and the compression device generates a compression force through the hot end compression plate and the cold end compression plate to extrude a seal ring corresponding to the seal pipe so as to form a pressure-bearing seal chamber composed of the hot end sealing plate, the seal pipe and the cold end base; a temperature measuring device and a pressure measuring device are respectively used for measuring temperatures and pressures of a thermophysical property test sample to be tested in the pressure-bearing seal chamber before and after filling or drawing out a gas, and then the thermophysical property of a solid material is tested. The testing device and the testing method provided by the invention can eliminate test errors caused by thermal contact resistance, radiation and heat convection, thereby effectively improving the testing accuracy of thermophysical property parameters.

The embodiment of the invention provides a radio frequency front end circuit of a mobile terminal and a whole machine coupling testing method. The radio frequency front end circuit comprises a master antenna, a diversity antenna, a diversity antenna switch and a first power detection circuit, wherein the diversity antenna uses coupling effects between the master antenna and the diversity antenna and receives testing signals transmitted by the master antenna; the input end of the diversity antenna switch is connected with the diversity antenna for receiving the testing signals from the diversity antenna; the output end of the diversity antenna switch is used for outputting the testing signals to the first power detection circuit; and the first power detection circuit is used for carrying out power detection on the testing signals to realize whole machine coupling test on the mobile terminal. Thus, dependence on an integrated test instrument can be eliminated, and the hardware cost in the case of whole machine coupling test is reduced.

The invention discloses a device for testing the characteristics of breaker opening and closing coils. The device comprises a controller, a coil resistance testing unit and a coil insulation and number-of-turns testing unit. The controller is respectively connected with a signal source, the coil resistance testing unit and the coil insulation and number-of-turns testing unit, the coil resistance testing unit and the coil insulation and number-of-turns testing unit perform testing through a coil to be tested, tested data are sent to the controller, the controller performs fault diagnosis on the breaker opening and closing coils in real time, and therefore real-time monitoring of the breaker opening and closing coils is realized. According to the device, the performance and the quality of the coils are estimated through testing of the characteristics of the coils, quality defects and fault hidden dangers are eliminated, the reliability and the stability of products in use are guaranteed, and the operation safety of a power system is improved.

The invention discloses an analog quantity merging unit transient state delay test method based on frequency scanning. Sudden-change quantities of a received standard source signal and a signal to be measured are judged in real time, a starting moment of a transient state process is determined, waveform signals are collected, the amplitude and the phase angle of each harmonic are calculated, the transient state delay corresponding to each harmonic is calculated, and ultimately, the ultimate transient state delay is calculated according to the amplitude of each harmonic and the transient state delay corresponding to each harmonic. Transient state transmission time is calculated through a weighting coefficient, test currents do not need to be output specially, universality is high, and the method is suitable for all merging units with low-pass filter coefficients, port modes and port protocols currently. A high-precision constant-temperature crystal oscillator is used for controlling timing sequence and eliminating errors, the transient state starting moment of tested data is guaranteed, and sampling precision of higher harmonics is improved by means of a four-step Bessel filter. The analog quantity merging unit transient state delay test method based on frequency scanning can be widely used in the field of relay protection and verification.

A panel performance testing system and method of use is provided for evaluating creep and duration of load (DOL) performance of products, particularly wood-based panels, subjected to bending stress. The panel performance testing system comprises a panel testing support frame assembly; a loading head assembly for applying test load to a panel face; a load transfer assembly for transferring load force from a dead weight to the loading head assembly; a panel deflection sensor; and a mobile loading platform assembly for vertically positioning and supporting dead weight loads, controlling the rate of load transfer of the dead weight loads from the loading platform assembly to the loading head assembly, and an integrated data acquisition system that automatically records and processes the related testing data for the entire course of the testing.

The invention discloses environmental-friendly anti-corrosive polyaniline paint which has high content of polyaniline, good anti-corrosion performance and low cost, causes no pollution and is suitable for preventing steel, magnesium and other metals from being corroded. The environmental-friendly anti-corrosive polyaniline paint contains component A and component B which have the weight ratio of 7:1 to 17:1, wherein the component A contains the following components according to the portion by weight: 40-80 portions of liquid epoxy resin, 4-40 portions of plasticizing agent, 0.1-4 portion(s) of emulsifying agent OP-10, 4-10 portions of small-molecular fatty alcohol, 0.1-15 portion(s) of ammonium persulfate, 0.1-3 portion(s) of distilled water, 0.1-2 portion(s) of 0.4-0.8mol/L camphorsulfonic acid solution, 0.1-16 portion(s) aniline, 0.5-1 portion of defoaming agent and 4-20 portions of reactive diluent.

The invention discloses a method for monitoring the damage of a concrete structure based on piezoelectric intelligent aggregate. The method comprises the following steps: designing a piezoelectric intelligent aggregate sensor and a driver which are independently packaged; and establishing a damage statistical index of the concrete structure based on wavelet analysis and a method for determining the damage degree, the damage probability and the damage position, and providing a statistical recognition algorithm for the damage of the concrete structure of the piezoelectric intelligent aggregate based on wavelet analysis. According to the method disclosed by the invention, the influences of partial test errors are eliminated to a certain degree, and the uncertainty of a damage identification problem is well reflected and is converted into mathematical description in the probability statistical significance, so that the problem of uncertainty of the damage identification is effectively solved, the damage degree and damage probability of the concrete structure can be determined, and the rough position (range) of the damage can be effectively recognized.

The invention provides a Slimline interface SATA signal test fixture and test method. The test fixture is composed of a Slimline male head, two pairs of PCB wires and two pairs of SMA male heads. TheSlimline male head connects the test fixture and the tested interface. The PCB wires lead the signal to the SMA male head interface from the Slimline interface. The SMA male head is connected with anoscilloscope through an SMA cable. According to the test fixture, the Slimline interface SATA signal test can be conveniently performed and connection with the oscilloscope through the SMA cable can be realized so that operation is flexible and convenient, the test efficiency can be enhanced, the measurement error caused by direct spot measurement through the probe can be eliminated and the test accuracy can be enhanced.

The invention relates to an improved component structure of a spectrophotometer as a scientific analysis experimental instrument, in particular to a verifying mechanism which is used for automatically regulating 0 percent Tau and 100 percent Tau before the spectrophotometer is used. An automatic optical gate device of the spectrophotometer comprises a receiving darkroom (4) positioned beside a sample chamber (7), a biconvex lens (6) and a photoelectric receiver (4) are sequentially arranged in the receiving darkroom (4) on the light incident direction of an optical gating, a permanent magnet (13) which can move up and down is arranged between the biconvex lens (6) and the photoelectric receiver (4), an electromagnetic coil (12) is arranged above the permanent magnet (13), the lower part of the permanent magnet (13) is connected with an optical gate (15), and a positioning seat (16) is arranged below the optical gate (15). The invention has convenient use, fast operation, high automation degree and strong accuracy, thereby being a spectrophotometer automatic power-on verifying mechanism which has practical value.

The invention discloses a method for testing sensitivity of a non-coherent FMCW autodyne receiver. Firstly, a power stepping value covering initial power of a minimum signal which can be received by a receiver in practical working and satisfies a precision requirement in practical working is set in a standard signal-generator; the signal-generator is arranged to be of an internal pulse modulation mode so as to generate test signals of the non-coherent FMCW autodyne receiver; test signals generated by the signal-generator are feed into the non-coherent FMCW autodyne receiver via a test antenna, and are subjected to detection in a detector in the non-coherent FMCW autodyne receiver; a direct current demodulation voltage signal Vd is output in real time to be displayed on an oscilloscope; the Vd is read out on the oscilloscope to be compared with a preset threshold magnitude of voltage VG; if the Vd=VG, a test person records the present signal source output power Prf; and the sensitivity of the non-coherent FMCW autodyne receiver is calculated according to the Prf. According to the invention, problems that the sensitivity of the autodyne receiver can not be accurately tested due to frequency temperature drift of frequency temperatures of a built-in VCO of the non-coherent FMCW autodyne receiver are solved.

The invention discloses an optical lens optical axis thermal stability testing device and method. The device comprises an optical platform, a star simulator, an imaging assembly, a temperature controland clamping device, a detection circuit and image acquisition and calculation equipment. The imaging assembly comprises an optical lens and a detector assembly. The star simulator, the imaging assembly and the temperature control and clamping device are all arranged on the optical platform during testing; light emitted by the star simulator is imaged on a detector assembly in the imaging assembly; the temperature control and clamping device is used for clamping the imaging assembly, and a temperature change of the imaging assembly is controlled through an electric heating piece or an oil waypipeline facility arranged in the temperature control and clamping device; the optical lens in the imaging assembly is used as a tested unit in the test to converge target source light and image on the detector assembly; the detection circuit is connected with a detector assembly in the imaging assembly and is used for forming control and output of images; and the image acquisition and calculation equipment is connected with the detection circuit and is used for acquiring, recording, analyzing and calculating the images.

The invention discloses a sub-angstrom-level super-smooth transparent substrate surface test system based on differential scattering. The sub-angstrom-level super-smooth transparent substrate surface test system consists of a light source system, a rotary table system, a sample stage system, a photoelectric detection system and a data collection and display system. In the rotary table system as shown in a figure in the specification, each component is in fully rigid connection; precision rotary tables C1 and C2 are fixed on an optical platform A by standard fastening screws; and a polarization analyzer, a photoelectric detector and the like are fixedly connected onto the precision rotary table C2 by an extension plate of the measurement system. By using the polarization interference principle and regarding the first-order differential scattering perturbation theory as a guideline, suitable polarizing direction and polarization analyzing direction are selected to eliminate the volume scattering of the substrate and effectively and independently measure the microstructure of the sub-angstrom-level super-smooth transparent substrate surface. The sub-angstrom-level super-smooth transparent substrate surface test system based on differential scattering can be used for rapidly and accurately screening fused quartz or microcrystalline glass substrates used in the research and production of high-precision laser gyroscopes, and synchronously, the invention provides a universal method for testing the super-smooth transparent substrate surface.

The purpose of the invention is to provide a temperature controller synchronization degree tester and a testing method thereof. The temperature controller synchronization degree tester is used for detecting the synchronization of a snap-action temperature controller in order to increase detection accuracy and efficiency and decrease the labor intensity of workers. The temperature controller synchronization degree tester comprises a control device, a switch-off synchronization detection board, and a switch-on synchronization detection board. A heater is disposed in the switch-off synchronization detection board. Each of the switch-off synchronization detection board and the switch-on synchronization detection board is provided with a state detecting device and a sensing device. Each sensing device comprises a sound sensor and/or a vibration sensor and is connected with the control device. Each state detecting device is composed of a power supply and relay. One end of each power supply is connected with a first terminal clip and the other end of the power supply is connected with the first control end of the corresponding relay. The second control end of each relay is connected with a second terminal clip. The two terminals of the output circuit of each relay are connected with the control device.

The invention discloses an environment-friendly polyaniline anti-corrosion and anti-shedding coating. The coating comprises a component A and a component B, wherein the weight ratio of the component A to the component B is (10 to 1)-(20 to 1); the component A is prepared from the following components: (1) 53g of liquid epoxy resin E56, (2) 6g of diethylene glycol dibenzoate, (3) 0.5g of OP-10, (4) 10g of n-amyl alcohol, (5) 3g of ammonium persulfate, (6) 1.5g of distilled water, (7) 1g of 0.4mol/L camphorsulfonic acid water solution, (8) 10g of aniline, (9) 0.5g of methyl silicone oil and (10) 7g of neopentyl glycol diglycidyl ether; the component B comprises the following components: 110g of liquid fatty polyamine, 30g of polyaniline, 5g of quartz sand, 10g of ethylene glycol phenyl ether, 5g of talcum powder and 5g of rosin glycerin ester. The coating has the advantages of high polyaniline content, good anti-corrosion property, no pollution, low cost, and the like.

The invention discloses a capacitor test circuit. The circuit comprises a constant-current source circuit, a voltage comparison circuit and a sampling timing circuit; the constant-current source circuit is used for generating constant charging current to charge a capacitor to be tested; the voltage comparison circuit is used for acquiring the output voltage of the capacitor to be tested, and outputting control signals when the output voltage is greater than a preset first voltage and smaller than a preset second voltage, wherein the control signals are used for triggering the sampling timing circuit to generate sampling signals; and the sampling timing circuit is used for recording the lasting time of the sampling signals, and calculating the capacitance value of the capacitor to be testedaccording to the charging current, the difference value of the second voltage and the first voltage, and a timing result. According to the capacitor test circuit of the present invention, the first voltage, replacing a zero voltage, is adopted as the initial value of the start of timing, and therefore, test errors caused by a condition that a voltage zero position is susceptible to interference can be eliminated, and the accuracy of test results can be improved.

The invention relates to a train inside static magnetic field test and running state analysis apparatus and analysis method. The train inside static magnetic field test and running state analysis apparatus comprises a monopole antenna, a voltage-dividing capacitor, an emission system, a receiver and an oscilloscope. The monopole antenna, after performing voltage division on received signals through the voltage-dividing capacitor, inputting the signals into the emission system, the emission system transmits the signals to the receiver through fibers, and the receiver transmits the signals to the oscilloscope for display through cables. According to the invention, through manufacturing the monopole antenna, a test system is erected, the monopole antenna is calibrated, the electromagnetic field intensity inside a train is tested, data is obtained, compensation processing is performed, waveforms are reconstructed, and waveform distortion is reduced.

The invention discloses a grounding grid performance detection method and system based on a wireless sensor network. The detection system is simple in structure. Multiple groups of test data can be obtained simultaneously through one test, the test speed is high, and the efficiency is high. The data is analyzed and calculated through the analysis platform, step voltage result data of multiple groups of test points can be obtained, so that the purpose of comprehensively examining the performance of the whole earth screen is achieved, and the result is real and comprehensive. According to the method, singular detection points existing in the result can be observed more visually by scanning and measuring the condition of the whole ground net, the ground net is improved more specifically, test errors caused by underground soil, pipe network distribution, damage to a part of the ground net and other factors can be effectively eliminated, the condition of the ground net is effectively and truly reflected, and the method has high accuracy.

The invention provides a method used for measuring photoetching machine vertical measuring system reflector surface shape. The method comprises following steps: 1) a substrate is uploaded onto a workpiece table, and a reticle mask with confirmable optimum focal plane marks is uploaded onto a reticle stage; 2) the Y direction position of the workpiece table is maintained to be unchanged, n times of stepping on the Z direction of the workpiece table are realized via controlling by an interferometer, wherein after each time of stepping of the workpiece table, stepping of a same space on the X direction is carried out, so that exposure of the confirmable optimum focal plane marks of the reticle mask onto the substrate is realized; 3) after n times of height exposure, stepping of one space of the workpiece table on the Y direction is realized, and the step 2) is repeated until exposure of the whole substrate is realized, and exposure of m groups of masks is realized; 4) the substrate is subjected to development and drying, and is uploaded onto the workpiece table, and reading of alignment positions of n*m masks is carried out; 5) alignment offset of the masks is calculated based on the alignment positions, the optimum focal position BF of yi at each Y-direction is obtained via calculation based on the relationship of the alignment positions with defocusing amount, so that changing amount of the optimum focal position is represented by a formula in the invention, and whererin F-T are used for representing the workpiece table positions; 6) fitting of the reflector surface shape is carried out based on the m positions yi, and distance <delta>hi of actual positions of the corresponding reflector surface shape to the nominal positions.

The invention discloses a flame retardant anti-corrosion environment-friendly polyaniline coating. The coating comprises a component A and a component B, wherein the weight ratio of the component A to the component B is (10 to 1)-(20 to 1); the component A is prepared from the following components: (1) 70g of liquid epoxy resin E44, (2) 24g of dioctyl phthalate, (3) 2.5g of OP-10, (4) 8g of n-butyl alcohol, (5) 4g of ammonium persulfate, (6) 2g of distilled water, (7) 0.5g of 0.8mol/L camphorsulfonic acid water solution, (8) 6g of aniline, (9) 0.8g of methyl silicone oil and (10) 4g of neopentyl glycol diglycidyl ether; the component B comprises the following components: 140g of liquid fatty polyamine, 10g of polyaniline, 10g of xanthan gum, 7g of ethylene glycol phenyl ether, 12g of methylcellulose and 3g of turpentine silicone oil. The coating has the advantages of high polyaniline content, good anti-corrosion property, no pollution, low cost, and the like.

The invention discloses a thermistor static test sorting machine, comprising a transmission chain, a test piece, a test wheel shaft, a test wheel rotating together with the test wheel shaft and taking a to-be-tested element from the transmission chain to the test piece, and a slicer capable of transferring continuous rotation input into interval rotation and static, wherein the slicer comprises an input wheel and an output wheel which is connected together with the test wheel shaft through a timing belt pulley. The test of the to-be-tested element is changed from a dynamic test into a static test, so that test error produced by relative movement between the to-be-tested element and the test piece is eliminated; and reliability of the test results is increased.

A radio-frequency switching unit control method based on an ARM (advanced reduced instruction set computer machine) and a DSP (digital signal processor) mainly includes a control procedure of a lower computer control unit of a radio-frequency automatic control system and a control procedure of an upper computer control unit of the radio-frequency automatic control system. The control procedure of the lower computer control unit mainly includes the steps: initializing a power source and a central processor, setting a module address selection circuit module, using the central processor to analyze data transmitted by an upper computer, and the like. The control procedure of the upper computer control unit mainly includes the steps: initializing a power source, a GPIB (general purpose interface bus), initializing the central processor, using the central processor for read-write operations according to the GPIB bus, and the like. The radio-frequency switching unit control method is implemented by means of mutual data interaction between an upper computer module and a lower computer module. The radio-frequency switching unit control method has the advantages of simplicity, feasibility and flexibility in operation.