33results about How to "Guaranteed test reliability" patented technology

The invention relates to a vibration table detection instrument field. In order to overcome the defects of the prior art, a signal processing approach is designed to allow a virtue instrument to be applied to the measurement field and an instrument suitable for measurement is designed accordingly on the basis of the signal processing approach. More particularly, the invention relates to a virtual vibration table detecting signal processing method and the instrument. The method comprises the processes: (1) the acceleration value of the vibration table is collected and converted into electric signals; (2) the signal is conditioned by a signal conditioning instrument; (3) the conditioned signal is collected by a data collecting card and transmitted to a computer; (4) the signal is preprocessed by the computer; (5) the preprocessed signal is discrete Fourier transformed and digital signal frequency domain filtered; (6) in the end, a speed component is output after the signal is integrated for one time; a displacement component is output after the signal is integrated for two times. The detection instrument comprises an acceleration sensor, a signal conditioning instrument, a data collecting card and a computer.

The invention provides intelligent power failure testing method and system. The intelligent power failure testing method and system drive a weak-current control module and a strong-current control module to be in order power failure and power on via a control end according to parameter setting and controllable output of data of equipment to be tested. Therefore, full-automatic intelligent power failure testing is realized, and the intelligent power failure testing method and system have the advantages of high efficiency, labor cost saving and higher safety. Besides, testing demands of higher requirements for safety coefficient of strong current types can be met. Products can meet various testing demands of equipment, and testing cost is reduced. The intelligent power failure testing method and system can be more adaptive to realize remote control and more convenient to manage and testing reliability is guaranteed by real-time monitoring.

A parallel multi-loop power transmission line zero sequence parameter positive sequence on-line testing method is disclosed and belongs to the field of parallel multi-loop line coupling parameter testing. According to the method, steady-state data is used for testing positive sequence impedance and admittance of a loop line being tested, a ratio of impedance of parallel multi-loop lines and a ratio of admittance of the parallel multi-loop lines are calculated in the same environment, own impedance (own admittance) Z<->ii and mutual impedance (mutual admittance) Z<->ij are estimated and are finally presented in a formula defined in the description, errors can be effectively suppressed, and zero sequence coupled impedance and admittance of the parallel multi-loop power transmission lines can be tested indirectly on line. Via use of the testing method put forward in the invention, special-purpose zero sequence operation is not required, normal system operation cannot be affected, specifically effects exerted on an impedance testing method by soil resistivity is taken into account, fault tolerance capability and anti-interference capability of the method can be guaranteed, a parallel multi-loop power transmission line parameter testing method can be simplified, and testing efficiency, flexibility and operability can be improved.

The invention provides a sensing device for testing the weight of contents in a washing bucket of a washing machine, which realizes stable and accurate detection. The sensing device comprises hanging hooks A connected to upper portion corners of the inner wall of an outer tank body of a washing machine and hanging hooks B connected to the lower portion of the outer wall of a washing bucket of the washing machine; the hanging hooks B and the hanging hooks A correspond to each other longitudinally; a lifting rod is hung on and connected to each hanging hook A; each hanging hook B is connected with a shock absorber via the hanging and connection of an outer shell of the shock absorber; the lower end of each lifting rod extends into the outer shell of the corresponding shock absorber; a support body is arranged in each outer shell; the lower end of each lifting rod is connected with the corresponding support body; a shock absorption spring is arranged between each support body and the upper top of the corresponding outer shell; the bottom of each outer shell is provided with a spring A and the upper end of the spring A is pressed against a magnetic iron core; a spring B is pressed against each magnetic iron core and the corresponding support body therebetween; the periphery of the lower portion of each outer shell, corresponding to the matching magnetic iron core, is fixedly sleeved with an inductance coil; the elastic coefficient of the springs A and the elastic coefficient of the springs B are not equal. The sensing device is used for detection of the weight of contents in a washing bucket of a washing machine.

The invention discloses silver paste with high conductivity at 80 DEG C and a preparation method thereof, and belongs to the technical field of conductive paste. The invention provides the silver paste with high conductivity under an ultralow-temperature curing condition, the silver paste can be cured under the low-temperature condition of 80 DEG C and has excellent conductivity, the resistivity of the silver paste is less than 2.5*10<-7> ohm.m, and the silver paste can be used for manufacturing a 5G mobile phone terminal antenna. The adhesive force on the surfaces of plastic, metal, printingink, glass, ceramic and other base materials is excellent, and the adhesive force reaches 5B after high-temperature boiling (100 DEG C, 30 min). Meanwhile, the reliability test requirements of a conventional portable terminal under the conditions of high temperature, high humidity, cold and hot impact, salt mist, ultraviolet irradiation and the like can be met. The paste of the silver paste can beused for manufacturing circuit patterns on a plane and a curved surface through pad printing or silk-screen printing construction.

The invention provides a detection device for fan-head mechanisms. The detection device comprises a positioning unit and a push-and-pull component; the positioning unit is used for fixing a support of each fan-head mechanism, the push-and-pull component having a reciprocating state is disposed on one side of the positioning unit, and an operating end of the push-and-pull component is connected with a fan head of the fan-head mechanism. By the aid of the positioning unit, the support of the fan-head mechanism is fixed during testing, the fan-head mechanism is prevented from sliding accidentally during testing, and test reliability is guaranteed. Since the operating end of the push-and-pull component is connected with the fan head of the fan-head mechanism, the fan head is driven to move along with reciprocation of the push-and-pull mechanism and do pitching motion continuously, and accordingly, labor is saved, labor intensity of work staff is reduced, test cost is lowered, and uniformity and accuracy in testing are guaranteed. The detection device has the advantages of simple structure and low manufacturing cost.

The embodiment of the invention provides a silicon wafer edge roughness detection jig and a detection method. The silicon wafer edge roughness detection jig comprises a base and a clamping component; the base isused for bearing a silicon wafer sample, the base comprises a horizontal bottom surface and an inclined bearing surface, a preset included angle alpha is formed between the horizontal bottom surface and the inclined bearing surface, and alpha is larger than 0 and smaller than or equal to 90 degrees; and the clamping component is used for clamping and fixing the silicon wafer sample, and the clamping component is arranged on the inclined bearing surface. According to the silicon wafer edge roughness detection jig and the detection method provided by the embodiment of the invention, the roughness and the surface appearance of the edge of a silicon wafer can be evaluated, the measurement error can be reduced, and the test reliability can be ensured.

The invention discloses an insulated wire withstand voltage test method and a test tool thereof, and relates to the technical field of insulating layer breakdown voltage test. An insulated wire sample is folded and twisted into a twisted wire pair, then the insulated wire sample is tightly wound on a conductive column, insulating layers at the two ends of the insulated wire sample are removed to make conductor sections exposed out of the ends of the insulated wire sample, and test voltage is applied to the conductor sections and the conductive column of the insulated wire sample so as to measure the voltage resistance and value of the insulating layer of the insulated wire sample. The twisted insulated wire sample is wound on the conductive column, so that the wire rod is more compact, personal errors are reduced, and the test effectiveness and reliability are improved. The insulated wire withstand voltage test tool is used for implementing the method, the conductive column is erected on the first positioning piece and the second positioning piece, and the first conductive body and the second conductive body are electrically connected with the conductive column and the insulated wire sample, so that the test efficiency is improved and the operation process in the test process is simplified on the premise of improving the effectiveness of the test result.

The invention discloses a manual test base with an upper slider structure, comprising a test base and an upper cover, wherein the upper cover is hinged to one side of the test base and can be flippedand pressed with the test base, a floating plate structure is disposed on the test base, a chip slot is formed in the floating plate structure, a slider is arranged in the middle of the upper cover through a chute on a side, a pressure plate is rotatably disposed in the middle of the slider through a pressure plate groove, the pressure plate is opposite to the chip slot when the upper cover is closed, a stop tongue is disposed in the pressure plate groove such that the pressure plate is inclined, and a return spring and an adjusting screw are symmetrically disposed on the upper and lower sidesof the slider. The manual test base has a simple structure; by using a slider structure on the upper cover, the pressure plate and a chip do not slide relative to each other when the pressure plate is rotated to press the chip; and the pressure plate is inclined to ensure that the contact planes of the pressure plate and the chip are nearly parallel, thereby avoiding local extrusion to the chip and ensuring the test reliability.

The invention relates to a form and position error self-adaptive device of a planetary roller screw life test bench, a spherical hinge assembly is fixedly connected with a center frame, and a ball head in the spherical hinge assembly can freely rotate without translation relative to the center frame; the ball head is connected with a left nut sleeve through a locking nut, a cross-shaped sliding block is installed between the left nut sleeve and a bearing cover, the left nut sleeve and a right nut sleeve are fixedly connected through a screw to form a nut sleeve assembly, and a nut of the planetary roller lead screw to be tested is installed in a cavity in the nut sleeve assembly. A gap is reserved between the outer circle of the nut and the outer circle of the nut flange and the nut sleeve assembly, the nut is fixed on the nut sleeve assembly through a pin penetrating through the nut flange, a gap is also reserved between the pin and a screw hole of the nut flange, and steel balls are evenly distributed in the two ends of the nut sleeve assembly to clamp the nut flange. And the nut has translational degrees of freedom in two radial directions relative to the nut sleeve assembly, and has four degrees of freedom except the degree of freedom of rotation around the axis of the lead screw and the degree of freedom of movement in the axis direction of the lead screw relative to the center frame.

The invention discloses a 4M 1553 bus transceiver system-level test system and a 4M 1553 bus transceiver system-level test method. The 4M 1553 bus transceiver system-level test system is composed of aresistor network unit, a first transformer unit and a second transformer unit. The resistance network unit is used for adjusting the output amplitude of the output signal end of the transceiver. Thetransformer unit is combined to realize stable transmission of signals; tests of transceivers in all application environments of 4M 1553 bus communication can be covered; the 4M 1553 bus transceiver test system is simple in circuit structure, good in integration level and accurate in test result, compared with a test method for building a communication network, the development cost and period of the test system can be reduced to a great extent, test verification is comprehensive and reliable, and test reliability guarantee is provided for application and development of the 4M 1553 bus transceiver.

The invention belongs to the field of engineering, and particularly relates to a method for carrying out a shield tunnel prototype test by utilizing an intermediate air shaft, which mainly comprises the following steps of: constructing an air shaft enclosure and a structure; breaking a tunnel portal; plain concrete and a soil layer are backfilled in the well; burying monitoring components in the stratum; the shield enters the air shaft, and first to sixth hoops are arranged; loading the upper part of the tunnel layer by layer; the upper layer of the tunnel is unloaded to the original real estate elevation; four reinforcing hoops are arranged; performing layered excavation and unloading to a tunnel vault; a temporary support frame is additionally arranged in the test duct piece; soil around the tunnel is excavated in a layered mode, and the form and thickness of a synchronous grouting inclusion are recorded; dismantling the test duct piece, removing the temporary support frame, and constructing a well joint structure; and constructing the residual main body structure in the air shaft. By adopting the test method, the middle air shaft space of the shield tunnel is fully utilized as a natural site of a prototype test, the construction cost is not increased while the construction and stress characteristics of the shield tunnel under the construction working condition are simulated, and the shield construction and test safety is ensured.