73results about How to "Avoid influence of test results" patented technology

The invention provides a method and system for detection and fault positioning of a SoC chip through laser simulation single particle irradiation. The method comprises the following steps of (1) performing hollowed-out processing on a test area of a to-be-tested chip; (2) if dynamic testing is carried out, selecting a function testing program of a certain module, starting function testing, and outputting a testing result; (3) if static testing is carried out, bypassing a PLL clock, stopping clock signal input, and detecting a circuit state through the current change; and (4) if reset state testing is carried out, connecting a reset pin to the ground, enabling the SOC chip to be continuously in a reset state through a reset circuit, and detecting the circuit state by observing the current change and a phase-locked loop frequency waveform. According to the method and system, the influence of larger laser spots on a non-test area is avoided, and the comprehensiveness and the accuracy of SOC chip testing are improved.

The invention discloses a device for testing the oiling performance of a cellulose acetate tow. The device comprises an oil pump, an oil inlet duct, an oil groove, a plurality of godets, an oiling wheel, an upper doctor blade, a lower doctor blade, a tester, an output roller, a control device and other components and parts, wherein the tester is a cylindrical capacitor which is provided with a hole in the interior, and the tow is conveyed out through the interior of the capacitor. The test method is as follows: when the tester detects the oiling rate of the tow is unqualified, the control device controls and adjusts the distance between the lower scraper and the oiling wheel through a doctor blade control line, and further controls the oiling amount of the tow. The rotating speed of the oiling wheel is 10-50r/min, and the rotating speed of the output roller is 400-850m/min. The device provided by the invention is reasonable in structure and convenient to operate, the oil-bring performance of the oiling wheel can be separately tested, the oiling performance of the tow can be detected on line, and the control and adjustment are accurate.

The invention provides a multi-union flexible wall permeameter with infinite volume injection under graded confining pressure and a test method, which belong to the field of flexible wall permeameters. The multi-union flexible wall permeameter comprises a pressure supply system, an infinite volume injection system, a graded confining pressure temperature-controllable permeation system and an automatic percolate monitoring and collecting device. The infinite volume injection system comprises a plurality of groups of same infinite volume injection devices, the graded confining pressure temperature-controllable permeation system comprises a plurality of same graded confining pressure temperature-controllable permeation devices, and permeation tests under various set temperatures, various set liquid confining pressures and various set injection pressures can be simultaneously carried out. According to the flexible wall permeameter, the determination of the permeability coefficient under different confining pressure states is realized, the functional defects of the existing flexible wall permeameter are overcome, and more manpower and time are saved.

The invention provides a testing device for working pressure inspection of a thin hydraulic rubber capsule and a test method thereof. The test device for working pressure inspection of the thin hydraulic rubber capsule includes a pressure bearing box, a top cover clamping plate, a base clamping plate and an auxiliary device. The pressure bearing box is placed in a center position between the top cover clamping plate and the base clamping plate through the auxiliary device, and is fastened and pressed by bolt fasteners passing through the corresponding bolt holes of the upper and lower clampingplates. The top cover clamping plate is provided with a pressure test hole and a pressure-filling hole, the pressure test hole is connected with the pressure meter, and the pressure-filling hole is externally connected with a hydraulic pump. The invention can carry out a pressure-filling test on the thin hydraulic rubber capsule, so as to test whether the capsule can reach a designed working pressure and keep the working state stable; and meanwhile, the invention can measure the maximum working pressure of the capsule, and check the tightness of the contact joints of each component.

The invention discloses a test device of a concrete shear creep coefficient and a test method thereof. The test device comprises a bracket which is used for supporting a long edge of a cross beam specimen, so that the support end of the cross beam specimen rotates along a support line, wherein a loading bracket is arranged on the other long edge of the specimen; a loading weight is placed on the loading bracket; and a strain transducer is respectively arranged at the intersected position at the center of the cross beam specimen along the long edge, and conveys the collected signal to a collection case through a lead. The test method comprises the following steps: casting the specimen into the cross beam specimen, and measuring compressive strain and tensile strain in idle load; mounting the loading bracket on which the loading weight is placed, and measuring the compressive strain and the tensile strain after loading; computing the elastic strain of the load age by comparing with the numerical value in idle load; obtaining the elastic strain at any moment by long-term continuous collection; finally computing the shear creep coefficient according to the formula. Thus, reverse loading is carried out through the bending of the cross beam; the test device and the test method are simpler, more convenient and safer to operate.

The invention provides an automatic test system and method for voltage endurance capacity of an alternating current contactor (ACC). The system comprises a sag generator, an ACC, a load power supply,a load, a power quality monitoring system and a computer, the sag generator is connected with the ACC, realizes power supply to the ACC and forms one control loop, the load power supply is connected with the ACC and the load respectively, and one power supply loop that one load power supply supplies power to the load by virtue of the ACC is formed. The system provided by the invention is characterized in that the power quality monitoring system is connected with the sag generator and the ACC respectively and synchronously acquires data of the sag generator and the ACC. The system provided by the invention utilizes the power quality monitoring system for synchronously acquiring switching value signals, so that detection on the voltage endurance capacity of the ACC is realized. The system provided by the invention solves the problem of time synchronization of monitoring data, reduces workload of a tester and realizes automatic testing on the ACC and automatic generation of an endurance capacity report.

The invention relates to the technical field of electromagnetic compatibility and specifically relates to an electromagnetic compatibility passive control type adjustable load circuit and a box applying the circuit. The electromagnetic compatibility passive control type adjustable load circuit comprises a circuit master switch S1, a direct current ammeter A, a direct current voltmeter V, a current adjusting circuit, a control circuit and a load resistor RL, the current adjusting circuit and the control circuit are connected with the direct current ammeter A, and the circuit master switch S1 is connected with a positive pole of a tested power supply product, the direct current ammeter A and the direct current voltmeter V; the current adjusting circuit is connected with the control circuit; and one end of the load resistor RL is connected with the control circuit and the current adjusting circuit, and the other end of the load resistor RL is connected with a negative pole of the tested power supply product. According to the electromagnetic compatibility passive control type adjustable load circuit and the box applying the circuit, the circuit can work without additional power supplies, no electromagnetic radiation can be generated, the cost is low, the performance is reliable, the using is convenient and rapid, and the effect is obvious.

The invention discloses a test circuit board used for sorting machine tables. The test circuit board comprises a circuit backplane, polarity bases, a positive electrode switch and a negative electrode switch, wherein at least n negative electrode circuits are arranged on the front surface of the circuit backplane in parallel; at least m positive electrode circuits are arranged on the back surface of the circuit backplane in parallel; the negative electrode circuits and the positive electrode circuits are perpendicularly arranged; n*m pairs of the polarity bases are arranged on the circuit backplane; the polarity bases are used for being connected with solder strips of to-be-tested battery pieces; in each pair of the polarity bases, one polarity base is connected with the positive electrode circuit while the other polarity base is connected with the negative electrode circuit; the positive electrode switch is provided with m gears, and each gear is connected with one positive electrode circuit through an electric line; the negative electrode switch is provided with n gears, and each gear is connected with one negative electrode circuit through an electric line; and the m and the n are both positive integers, wherein m is greater than 1 and less than or equal to 5, and n is greater than 1 and less than or equal to 5. The test circuit board used for sorting machine tables provided by the invention is simple in preparation, low in cost, and high in accuracy and efficiency.

The invention discloses a voltage-stabilizing tested rotation speed automatic adjustment-type motor testing system, which is characterized by being composed of a single chip microcomputer, a rotation speed signal acquisition unit, a variable frequency motor control unit, an output display unit and an operation unit connected with the single chip microcomputer respectively, a tested motor connected with the rotation speed signal acquisition unit, a variable frequency motor connected with the tested motor, and a voltage-stabilizing power supply module connected with the variable frequency motor, and the variable frequency motor is also connected with the variable frequency motor control unit. The rotation speed of the tested motor can be quickly adjusted during the test process so as to test parameters of the tested motor at a different rotation speed, and the motor test efficiency is improved. Stable work voltage is provided for the variable frequency motor and the tested motor, the variable frequency motor and the tested motor can work stably, and a tester can evaluate the performance of the tested motor conveniently.

The invention discloses a soil body shearing device for moraine object dynamic performance testing, and belongs to the technical field of rock-soil body mechanical testing. The invention relates to a soil body shearing device for moraine dynamic performance testing. The soil body shearing device comprises a counter-force frame, a supporting assembly, a pressing assembly, a multidirectional loading assembly and a temperature control device. The supporting assembly is slidably arranged on the counter-force frame, the test piece is located between the supporting assembly and the pressing assembly, the Z-direction loading piece is located on the top face of the pressing assembly, loads are applied to the test piece through the pressing assembly, and the X-direction loading piece and the Y-direction loading piece make contact with the side faces of the supporting assembly correspondingly, so that the loads are applied to the supporting assembly; therefore, the test piece can bear shear loads in the normal direction and the horizontal direction at the same time, the loading condition is closer to the earthquake action borne by an actual engineering site, the shear stress can be directly applied, the generated shear strain can be directly measured, and the problem that dynamic performance testing of moraine objects is not convenient at present is solved.

The invention discloses a method for testing the interlaminar tensile strength of a 3D printed concrete member. The method comprises the steps of placing test pieces between brackets, and placing a pressure head on one test piece; enabling the pressure head to be in contact with a pressure head of a universal material testing machine, starting to press down, and measuring force F during fracture;and according to the area S of the crossed part of the two test pieces, obtaining the tensile strength Pten of the 3D printed test piece, namely, indicating that Pten = F/S. According to the testing device provided by the invention, grooves are formed in the parts, in direct contact with the test piece, of the brackets, in order to concentrate force during testing on the crossed part of the two test pieces, so that a test error is reduced; and roll balls are further arranged on the brackets, so that the test pieces can be prevented from being stuck in a testing process. According to the testing device and method provided by the invention, the axial tensile strength of the 3D printed concrete member can be obtained directly; the related problems that the stress direction is not clear, the fracture surface is not controllable and the like in a pull-off method are solved; the success rate of testing is greatly improved; the testing principle is simple and clear; and the reliability is high.

The invention discloses a special robot arm for a remote control key spurious emission test and an application method thereof. The robot arm comprises a bracket; and an intake guide mechanism and a pressing ejector rod for pressing a remote control key are respectively arranged at two ends of the bracket. The robot arm further comprises a pressing actuation mechanism, and drives the pressing actuation mechanism to drive to extrude the pressing ejector rod to enable the remote control key to emit a signal through compressed air introduced by the intake guide mechanism. The robot arm is manufactured by a no-electrification and no-metal material, uses the compressed air as a power source, prevents electromagnetic disturbance from influencing a testing result, is stable in output frequency signal of the remote control key, can improve the testing accuracy, and can promote the testing efficiency.

The invention discloses a precise salt spray testing device. The device comprises a test box in which a storage rack and a spray tower are arranged, and a drainage device, wherein the storage rack is arranged on the test box and is used for placing a to-be-tested workpiece, the spray tower upwards penetrates through the storage rack to spray salt spray into the test box, the drainage device comprises a water collecting tank, a first plug and a switch structure, the water collecting tank is connected to the lower part of the test box, a first drainage port is formed in the bottom of the test box, and water in the test box can be drained into the water collecting tank from the first drainage port; the first plug can be installed in the first drainage port to plug the first drainage port, and the switch structure is used for driving the first plug to move in the first drainage port so that the first plug can be installed in or separated from the first drainage port to control closing or opening of the first drainage port. According to the precise salt spray testing device provided by the invention, accumulated water in the test box can be discharged in time, the water level is prevented from rising to immerse a test piece, and a test result is prevented from being influenced.

The invention discloses a gearbox fault diagnosis simulation system comprising a base, a power generation device, a load simulation device and a sensor assembly used for detecting parameters of equipment to be detected, base T-shaped grooves which are arranged in a crossed mode and distributed in an array mode are formed in the base, an input transmission disc is connected to the power generation device, and an output transmission disc is connected to the load simulation device; the load simulation device comprises a load air compressor mounted on the upper surface of the to-be-tested equipment, the load air compressor is connected to the output transmission disc through a gearbox II, and the load air compressor is further connected with a balancing device used for counteracting the gravity of the load air compressor; in the process of detecting or simulating the to-be-tested equipment, the influence of the power generation device and the load simulation device on the monitoring equipment can be isolated to the maximum extent, but the torque is only transmitted to the to-be-tested equipment, so that the test and simulation effects are relatively good, and the influence of the power source and the load mechanism on the test result is avoided.