49results about How to "Improve test pass rate" patented technology

The invention discloses soldering paste and a soldering flux thereof, and preparation methods thereof. The soldering paste comprises lead-free soldering powder and the soldering flux, wherein the soldering flux comprises the following raw materials in percentage by weight: 6-15 percent of polyisobutene or polybutylene, 3-10 percent of imidazoles compound, 15-45 percent of rosin, 3-15 percent of thixotropic agent, 3-15 percent of active agent and the balance of solvent; therefore, through adding at least one of polyisobutene or polybutylene and replacing partial rosin with the polyisobutene orpolybutylene, on the one hand, the consumption of the rosin can be reduced so that yellow rosin residuals are reduced, on the other hand, the polyisobutene or polybutylene residuals are both colorless and transparent viscous fluid and can soften the harder rosin residuals so that soldering paste residuals are soft, colorless and transparent substances, therefore, the probe test passing rate is greatly improved, and an effective guarantee is provided for the welding quality of electronic products.

The invention provides a testing system and a server end thereof. The server end of the testing system comprises a main dispatching server, an auxiliary dispatching server, a testing server and a tracking device. The main dispatching server comprises a main dispatching unit, the auxiliary dispatching server and the testing server comprise executing units respectively, and the auxiliary dispatching server further comprises an auxiliary dispatching unit. The main dispatching unit is suitable for executing dispatching tasks which comprise the tasks of allocating testing tasks to the auxiliary dispatching server or the testing server. The auxiliary dispatching server is suitable for executing the dispatching tasks when the main dispatching server is abnormal. The executing units are suitable for executing the testing tasks allocated by the main dispatching unit or the auxiliary dispatching unit. The tracking device is suitable for ending a testing case which is in the executing process when a test abnormity is detected. According to the technical scheme, the testing system and the server end of the testing system are good in stability and high in testing efficiency.

The invention relates to a radio-frequency (RF) signal test connection structure, which comprises a radio-frequency tester, a tested product is provided with a radio-frequency signal test point, the radio-frequency tester is connected with a probe-type radio-frequency head by a radio-frequency cable, and a probe at the end part of the probe-type radio-frequency head is contacted and connected with the radio-frequency signal test point. The invention also relates to a method for realizing radio-frequency signal test optimization based on the radio-frequency signal test connection structure. The radio-frequency signal test connection structure and the radio-frequency signal test optimization method of the invention have the advantages that: the size of the test point is matched with the used probe-type radio-frequency head; the hardware test connection mode is as follows: an RF output port of the tester, the radio-frequency cable, the probe type radio-frequency head, and the radio-frequency signal test point of the tested product are sequentially connected, therefore, the cost for an antenna connector in a BOM of the tested product is saved; the probe-type radio-frequency head is not easy to be damaged, thereby reducing the test cost; the probe-type radio-frequency head is fixed on a clamp for testing, thereby improving the first pass yield of the tested product; meanwhile, the radio-frequency signal test connection structure and the radio-frequency signal test optimization method of the invention are high in test efficiency, simple in structure, fast and convenient to operate, stable and reliable in operating performance, and wide in application scope.

The invention discloses a test system and a method and a device for executing test tasks. The method for executing the test tasks includes terminating currently executed test cases when test anomaly is detected; storing execution progress of the test tasks after the test anomaly is detected when a preset number of test cases are executed, restarting at least one of a test server and test equipment and then executing the test tasks. The test anomaly includes at least one of anomaly of the test server, anomaly of the test equipment and anomaly of a mobile terminal. The test system and the method and the device for executing the test tasks have the advantage that the stability and the test efficiency of the automatic test system can be improved.

The invention provides an online four-way valve detecting and sorting device and a sealing detection method thereof. The device comprises a base with an upper frame. A three-axis carrying mechanism is arranged above the base. An automatic chain plate line is arranged on one side of the base. A defective product track is arranged on the other side of the base. A test carrier is arranged in the middle of the base, and the test carrier is connected with a test system inside the base. Four-way valves can be grabbed and placed automatically, and it is ensured that incoming four-way valves are located accurately and consistent in direction. Through the fully automatic process, the production efficiency is improved, the product quality is enhanced, and the production cost is reduced. Moreover, automatic location test is realized. For the problem of copper piping deviation of four-way valves, the precision of automatic shaping is high, the test pass rate is high, and the rejection rate is low. The problem of sealing failure caused by product size deviation is avoided.

The invention relates to a trimming circuit for an operational amplifier circuit. The trimming circuit is composed of a first variable resistor, a first current source, an input terminal 1, an output terminal 1, a first limiting resistor, a second variable resistor, a second current source, an input terminal 2, an output terminal 2, a second limiting resistor, a constant current source and a power supply. The operational amplifier has the advantages that the circuit has a flexible input offset voltage range, bidirectional trimming is set, and bidirectional flexible correction of operational amplifier input precision can be achieved. Therefore, the operational amplifier circuit can be flexibly used in actual use, and the use requirements of various occasions can be met through a trimming technology on a wafer, namely a test, of the circuit according to actual requirements.

The invention provides a fiber optic gyro inertial measurement product calibration parameter long-term stability defect detection method. Firstly, the static stability comprehensive test is performed on a fiber optic gyro inertial measurement product under the long-term stability test, and whether the start-up time, one-time power-on stability and multiple-time power-on repeatability of the product meet the technical requirements of the product specification is assessed synchronously; then the position flipping test is performed to confirm whether the fiber optic gyro inertial measurement product can keep stable after the flipping operation involved in the parameter calibration test, i.e., whether it meets the requirement of the primary power-on stability of the product specification is confirmed; and the calibration parameter long-term stability test is performed on the fiber optic gyro inertial measurement product passing the test. The method detects whether the fiber optic gyro inertial measurement product has the hidden trouble of over-poor long-term stability of the calibration parameters through the short-term and low-frequency tests so as to improve the success rate of the product passing the long-term stability test, save the equipment resources and the time cost and accelerate the production efficiency of the product.

The invention belongs to the technical field of an aero engine and relates to a process adjusting method for a ground test of the aero engine, in particular to a method for adjusting supercharging conversion rotation speed of the aero engine. By means of the method, repeated test runs of the engine is not required, parts of the engine are not required to be replaced, and production cost is reduced. The method is simple and convenient to operate and improves test run yield of the engine. The method includes the following steps that an ideal conversion rotation speed range of a supercharging conversion valve required by the engine is compared with current actual conversion rotation speed; if actual conversion rotation speed of the supercharging conversion valve is larger than the ideal range, the diameter of a tail nozzle of the engine is reduced through a hydraulic actuator cylinder piston rod; otherwise, the diameter of the tail nozzle of the engine is enlarged through the hydraulic actuator cylinder piston rod until the actual conversion rotation speed of the supercharging conversion valve is adjusted to the ideal conversion rotation speed range.

The invention discloses a solder ring for a microwave component radio frequency connector and a welding method thereof, belongs to the technical field of solder rings. The solder ring for the microwave component radio frequency connector is provided. The invention provides the solder ring for the microwave component radio frequency connector and the welding method thereof. According to the solder ring for the microwave component radio frequency connector and the welding method thereof, a spray head is above a guide ring, a motor is used for driving the guide ring to rotate, the spray head does circular motion, the spray head rotates around the guide ring for angle adjustment, and the defects that in the microwave component assembling process, the sealing effect of a through-wall radio frequency connector is poor, and the conductive glue bonding and manual soldering paste coating are not uniform are overcome. The test passing rate, the finished product rate and the working efficiency of products are improved. The working efficiency is greatly improved, the welding uniformity and the penetration rate of solder adopting the design are also greatly improved from the welding effect, and the sealing test can also meet the product requirements.

The invention discloses a method for improving the heating oven performance of hard PVC-U pipes. According to the method, annular reinforcing ribs are arranged at a sprue of an injection mold of the hard PVC-U pipes, the height of the reinforcing ribs is smaller than or equal to 5mm, and the outer diameter of the reinforcing ribs is greater than the outer diameter of the sprue but not greater than 1.1 times of the outer diameter of the sprue. According to the method, the mold structure is improved; the reinforcing ribs have the beneficial effects that stress concentration at the sprue can be reduced, the product strength can be improved, cold materials can be effectively prevented from entering products, poor flow marks can be eliminated, flow resistance can be reduced, injection force can be easily transmitted to far parts of formed products, and the welding strength can be improved; and through the improvement, the disqualification problem of heating oven tests of the hard large-diameter PVC-U injection molding pipes (phi greater than or equal to 160) is effectively solved, and the qualification rate of the heating oven tests of the large-diameter PVC-U pipes is greatly increased.

The invention discloses an overvoltage protection circuit for mobile phone game testing, which comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first potentiometer, a second potentiometer, a time base chip, a three-terminal voltage regulator, a power switch, a first resistor, a second resistor, a first rectifier, a second rectifier, a transistor, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a relay and a transformer. The overvoltage protection circuit has a dual protection function; the overvoltage protection circuit can protect a mobile phone game tester when mains supply voltage is overhigh, and also can prevent transient high impulse voltage from impacting the mobile phone game tester, thus benefiting the testing of a mobile phone game and increasing the pass rate of testing; moreover, the overvoltage protection circuit has a simple circuit structure and is low in fabrication cost, which is favorable for popularization.

The invention discloses a floating structure of a high-temperature hot end connector of an aero-engine. The floating structure mainly comprises a floating support, a distance bushing, a thin-wall part, a case, a gasket, a bolt and a nut; the distance bushing is of an annular structure with a limiting plate and a fastening plate, the diameter of the limiting plate is greater than the diameter of a round opening of the floating support, the annular width of the limiting plate is equal to the up-down floating gap, and a left-right floating gap is reserved between the limiting plate and the fastening plate; the round opening is formed in the middle of the floating support, and the fastening plate penetrates through the round opening so that the floating support can be arranged on the distance bushing in a sleeving mode and stopped on the limiting plate; the floating support 1 can float up and down within the up-down floating gap or float in the left-right direction within the left-right floating gap; the distance bushing is fixed to the case through the gasket, the bolt and the nut; and the floating support is a trapezoidal supporting arm and is connected to the thin-wall part through rivets in a riveted mode. The floating structure is reliable in work and easy to disassemble and assemble. According to the structural scheme, the test run qualification rate of the aero-engine can be increased, and the cost of the manufacturing step and the assembling step can be saved.

The embodiment of the invention provides an abut-joint device. The abut-joint device comprises an abut-joint female end and an abut-joint male end, wherein the abut-joint female end comprises a femaleend panel, an abut-joint guide hole and a female end abut-joint connector are mounted, the abut-joint male end comprises a male end panel, a propelling mechanism and a buffer adjusting mechanism, thepropelling mechanism and the buffer adjusting mechanism are connected with the male end panel, an abut-joint guide part is mounted at the position, corresponding to the abut-joint guide hole, of themale end panel, a male end abut-joint connector is formed in the position, corresponding to the female end abut-joint connector, of the male end panel, the propelling mechanism is used for propellingthe male end panel to move in the direction perpendicular to the abut-joint female end, the buffer adjusting mechanism is used for adjusting the position of the male end panel so as to buffer the vibration of the female end panel, through the abut-joint guide part and the abut-joint guide hole, abut-joint rough positioning is achieved, through the propelling mechanism, abut-joint precise positioning is achieved, the abut-joint precision is improved, through the buffer adjusting mechanism, the abut-joint male end can carry out buffer and automatic guide on deviation and vibration of the abut-joint female end, the problem that abut-joint stability is poor can be solved, and the test pass rate and the test efficiency can be improved.

The invention discloses a novel deadweight keyboard knocking module, aiming at providing a novel deadweight keyboard knocking module which enables operation of the whole equipment to be more safe, stable and efficient and enables maintenance of the equipment to be more simple and convenient. The novel deadweight keyboard knocking module includes a plurality of knocking sticks (1), a PCB (4), a PCB fixing rack (5) and an electromagnet fixing plate (7), wherein a guide plate (11) which is matched with the plurality of knocking sticks (1) is arranged below the electromagnet fixing plate (7); the PCB fixing rack (5) is arranged on the electromagnet fixing plate (7); placing holes are formed in the PCB fixing rack (5); the upper parts of the plurality of knocking sticks (1) penetrate through the placing holes; the PCB (4) is fixedly arranged on the PCB fixing rack (5); and through holes which are matched with the placing holes are formed in the PCB (4). The novel deadweight keyboard knocking module is applied to the technical field of the deadweight keyboard knocking module.

The invention belongs to the technical field of circuit board processing, and provides a method for improving the test accuracy of a test frame, which is realized through the following parameter control: controlling of test needle seed needle point selection; selecting a pipe position needle; and controlling the flatness of the test frame panel. The control of the test needle seed needle point selection specifically comprises the following steps: selecting a solder mask windowing PAD center by using a seed needle with a needle scattering slope of less than 300mil, properly deviating the seed needle at the BGA position with the needle scattering slope of more than 300mil, and just deviating and pricking to the central position of the solder mask windowing PAD during the test. According to the method, by controlling the position of the seed needle selected by the test needle, the selection of the pipe position needle and the flatness control of the panel, the deviation between the needleinserting position and the seed needle position during the test of the test frame is avoided, and the PCB does not swing or deviate during the test of the test frame. According to the method, the needle inserting precision of the test frame can be effectively improved, the test frame debugging time of testers is reduced, and the test one-time passing rate and the production efficiency are improved.

The invention discloses a streaming protocol development method and device, equipment and a storage medium, and the method comprises the steps: carrying out the visual assembly of a protocol message according to definition data, and generating a protocol program; debugging and testing analog data based on the protocol program to generate a debugging and testing result; and when the debugging and testing result passes the verification, determining that the streaming protocol development is completed. According to the invention, the protocol message is visually assembled and the protocol programis generated, so that manual protocol program encoding is avoided, the error rate of manual development is reduced, the analog data is debugged and tested through the protocol program, and the completion of streaming protocol development is determined when the debugging and testing result passes the verification. A protocol program is verified by adding an intelligent debugging step, so that thetest passing rate of butt joint of the Internet of Things equipment is effectively improved.

The invention discloses a catalytic gasoline de-mercaptan activating agent and a preparation method thereof. The catalytic gasoline de-mercaptan activating agent is prepared from the following ingredients in percentage by weight: 49 to 63 percent of absolute ethyl alcohol, 6 to 8 percent of octadecyl benzyl ammonium chloride, 6 to 7 percent of caustic soda flakes, 5 to 7 percent of isopropanol, 1to 3 percent of triethanolamine modified sodium lignin sulfonate, 0.1 to 0.2 percent of KH550 modified nanometer mesoporous alumina and the balance of water. The catalytic gasoline de-mercaptan activating agent obtained by the invention has good catalyst activation effects; the water-soluble and oil-soluble impurities on a catalyst fixing bed can be effectively removed, so that the use period of the catalysis fixing bed can be better prolonged; the deodorization rate of the gasoline and the test qualification rate of the refined gasoline are improved.

The invention relates to the technical field of electronic components, and particularly relates to an antenna radio frequency standing wave connector. The antenna radio frequency standing wave connector comprises a workbench and an antenna radio frequency standing wave connector body, wherein a mounting hole is formed in the surface of the workbench, the antenna radio frequency standing wave connector body is inserted into the mounting hole, a radio frequency line connecting port is formed in the bottom of the antenna radio frequency standing wave connector body, a radio frequency line is arranged at the other end of the radio frequency line connecting port, a connecting plate is arranged on the outer side of the antenna radio frequency standing wave connector body in a sleeving mode, anda fixing screw is arranged on the surface of the connecting plate. The beneficial effects are PINs are inserted into the surface of the antenna radio frequency standing wave connector, the outer sideof the PIN is sleeved with a lantern ring and then is pulled by a compression spring, and the end part of the antenna radio frequency standing wave connector body is sleeved with a protective frame, so that the PIN is telescopically inserted into the surface of the antenna radio frequency standing wave connector body, a product can also be subjected to compatibility test when the surface is deformed, and the test passing rate of the product is improved.

The invention discloses a catalytic gasoline de-mercaptan activating agent and a preparation method thereof. The catalytic gasoline de-mercaptan activating agent is prepared from the following ingredients in percentage by weight: 49 to 63 percent of absolute ethyl alcohol, 6 to 8 percent of octadecyl benzyl ammonium chloride, 6 to 7 percent of caustic soda flakes, 5 to 7 percent of isopropanol, 1to 3 percent of triethanolamine modified sodium lignin sulfonate, 0.1 to 0.2 percent of KH550 modified nanometer mesoporous alumina and the balance of water. The catalytic gasoline de-mercaptan activating agent obtained by the invention has good catalyst activation effects; the water-soluble and oil-soluble impurities on a catalyst fixing bed can be effectively removed, so that the use period of the catalysis fixing bed can be better prolonged; the deodorization rate of the gasoline and the test qualification rate of the refined gasoline are improved.

A test system and a method and device for performing a test task, the method for performing a test task includes: when a test exception is detected, the test case being executed is ended; the test exception includes test server exceptions, test equipment exceptions, and mobile At least one of the terminal exceptions; when a preset number of test cases are executed, a test exception is detected, the execution progress of the test task is saved, and the test is continued after restarting at least one of the test server and the test equipment Task. The method and device for performing testing tasks can improve the stability and testing efficiency of an automatic testing system.

The invention discloses a novel deadweight keyboard knocking module, aiming at providing a novel deadweight keyboard knocking module which enables operation of the whole equipment to be more safe, stable and efficient and enables maintenance of the equipment to be more simple and convenient. The novel deadweight keyboard knocking module includes a plurality of knocking sticks (1), a PCB (4), a PCB fixing rack (5) and an electromagnet fixing plate (7), wherein a guide plate (11) which is matched with the plurality of knocking sticks (1) is arranged below the electromagnet fixing plate (7); the PCB fixing rack (5) is arranged on the electromagnet fixing plate (7); placing holes are formed in the PCB fixing rack (5); the upper parts of the plurality of knocking sticks (1) penetrate through the placing holes; the PCB (4) is fixedly arranged on the PCB fixing rack (5); and through holes which are matched with the placing holes are formed in the PCB (4). The novel deadweight keyboard knocking module is applied to the technical field of the deadweight keyboard knocking module.

The invention discloses a sanding device for a shaft neck of a semi-shaft oil seal. The device comprises a bottom plate, a sanding belt, a driven wheel support, an electromagnetic braking motor, a time relay and a switch K1, wherein a step platform is arranged at one end of the bottom plate, and a supporting plate is arranged on the step platform; the electromagnetic braking motor is mounted at one end of the supporting plate; the time relay is mounted at the rear side of the bottom plate; the electromagnetic braking motor is sequentially connected to the time relay, the switch K1 and the power supply through conductors so as to form a closed loop; a driving wheel is arranged on an output shaft of the electromagnetic braking motor; the driven wheel support is of a tri-forked structure; a long waist shaped hole is formed in one edge of the tri-forked structure, and driven wheel devices are arranged at the tail ends of the rest two sides; and the sanding belt coils the driving wheel andthe driven wheels of the two driven wheel devices. According to the device, the surface of the shaft neck of the half-shaft oil sealing is polished and then is smoothened through the static sanding belt, so that the cotton yarn test pass rate is increased, and the potential risk of oil leaking of the half-shaft oil seal can be avoided.

The invention discloses a universal test supporting plate for solving the problem of high false test rate caused by pin bending. The supporting plate comprises a plate body. The four corners of the plate body are each provided with a T-shaped stepped hole. A circular hole is formed in the inner side of each T-shaped stepped hole. The left end and the lower end of the upper plane of the plate body are each provided with a plurality of pin holes. Each pin hole sequentially comprises a bottom conical hole body, a straight hole body and an upper conical hole body from bottom to top, wherein the small-diameter end of the bottom conical hole body and the small-diameter end of the upper conical hole body are connected with the two ends of the straight hole body in a fillet mode respectively, the large-diameter end of the bottom conical hole body and the bottom plane of the plate body are located on the same horizontal plane, and the large-diameter end of the upper conical hole body and the upper plane of the plate body are located on the same horizontal plane. In this way, the universal test supporting plate for solving the problem of high false test rate caused by pin bending has the advantages of being high in strength and light in weight; manual pin pulling operation of operators is omitted, a PCBA is prevented from being scratched by the operators, the product test qualification rate is increased, and product quality is improved.

The embodiment of the invention provides a user interface UI element explicit waiting method and device. The method comprises the steps of obtaining positioning information of a first element on a user interface; circularly executing a specific operation and detecting the state of the first element according to the positioning information of the first element until the state of the first element is updated to a specified target state or the total execution time of the cycle is greater than or equal to a specified total timeout time, and exiting the cycle.