1023results about How to "The test effect is good" patented technology

The invention relates to a fatigue testing device of a button switch, comprising a worktable (1) and a bracket (2) fixed on the worktable (1). A holding device for placing the button switch to be tested is arranged on the worktable (1), a cylinder (9) is arranged above the holding device, and the lower end of a piston of the cylinder (9) is connected with a pressing pole (10) for pressing the key of the button switch to be tested. The testing device also comprises a control device which is connected with the cylinder (9), used for controlling the cylinder (9) and setting testing parameters. The fatigue testing device of the button switch has the advantages that the button switch is automatically pressed by utilizing the cylinder, wherein the pressing force and the pressing frequency are kept highly consistent, and the pressing force, the pressing time interval and the pressing times all can be adjusted and set, thereby the invention has the advantages of very convenient use, good testing effect and high efficiency.

The invention relates to an underwater object detection and autonomous underwater vehicle (AUV) automatic collision prevention system based on mini sonar. The system comprises mini sonar, a sonar computer and a master control computer, wherein the mini sonar communicates with the sonar computer through a serial port RS485; the sonar computer is connected with the master control computer through anetwork; the master control computer is connected with an optical fiber gyro, a Doppler velocimeter, a height gauge, a dip angle sensor and a magnetic compass through a serial port RS232 respectively; and the master control computer is connected with a propeller and a rudder fin through a digital / analog (DA) channel simultaneously. The invention also provides an underwater object detection and AUV automatic collision prevention method based on mini sonar. By the system and the method, an underwater object is detected through the mini sonar, a position of an obstacle is determined, and a collision prevention instruction is given; therefore, an accurate collision prevention decision is made by the AUV.

The invention relates to a multi-parameter compound environment tester comprising a centrifuge for simulating a linear acceleration environment and an environment chamber arranged on the arm of the centrifuge, wherein the environment chamber is used for simulating a vibration acceleration environment, a noise environment, a temperature environment and an air pressure environment; a noise generation mechanism, a temperature control mechanism, a vibration generation mechanism, an air inlet and an air outlet are arranged in the environment chamber; the vibration generation mechanism comprises a test bench, a bench push rod and a corrective push rod fixed on the test bench, a supporting reed and a sensor; the chamber wall of a compound chamber is hermetically connected with the push rods; the bench push rod is connected with a vibration-bench moving coil; and the corrective push rod is connected with a corrective mechanism capable of preventing the vibration generation mechanism and the vibration-bench moving coil from excessively translating. The invention has the advantages of comprehensive simulation of work environment for devices, good test effect and high precision.

The invention discloses a test device for an engine thermal management system. The test device comprises an engine, an engine thermal management system, a plurality of sensors, an air channel, a cooling fluid pipeline, an air pipeline, a thermal management system motor driving device, data acquisition equipment and an engine test rack. By the test device, the performance of the engine thermal management system can be tested, the engine is loaded by using a dynamometer to provide actual working conditions for the thermal management system, the air channel, a windward fan, and an intercooler, a heat radiator and a fan which are arranged on an adjustable bracket are used for simulating cooling and heat transferring conditions inside a power cabin, operating characteristics such as flow, pressure and the like of all accessories of the engine thermal management system are measured by using the high-accuracy data acquisition equipment, and the heat exchange capacity of the heat radiator and the intercooler and the influence of the thermal management system on the performance of the engine can be quantitatively analyzed, so that the performance of the thermal management system can be comprehensively evaluated. By the test method, an important test basis is provided for product development of the thermal management system.

The invention provides a method for dynamically adjusting a priority sequence of test cases. The method comprises the following steps of: designing the test cases; calculating priority values of the test cases; and sequencing and dynamically adjusting the test cases. By dynamically adjusting the priority of the test cases in the test execution process, a plurality of system defects can be found in short time, and the using efficiency of the test cases is improved.

The invention relates to the technical field of speech, in particular to a real-time speech endpoint detection method and device. The method comprises the following steps that signal framing and emphasis are carried out; pulse removal processing is carried out; direct current components are removed; the short-time energy and zero-crossing rate of each frame of signal are calculated; windowing processing is carried out; spectrum reduction processing is carried out; spectral entropy is calculated; transformation smooth spectral entropy is calculated; a speech frame and a noise frame are preliminarily judged; the transformation smooth spectral entropy and a threshold are processed; a start frame and end frame in a speech segment are judged. The real-time speech endpoint detection method and device have the advantages that according to the conditions under which a signal is judged and a judged result, thresholds of parameters, such as a spectrum reduction threshold, the transformation smooth spectral entropy, the corresponding short-time energy, corresponding short-time average energy and a spectrum reduction power spectrum are weighted and updated, so that the thresholds are more andmore accurate, and finally the judged speech start frame and end frame are also more and more accurate; the method can efficiently and accurately detect speech in real time.

The invention discloses a remodeling sample compactor of a hollow columnar torsion shear apparatus, comprising a die and a compactor. The die comprises a sample pedestal, a sample outer die, a sample inner die, an extension long barrel and an intension long barrel, wherein, the sample outer die and the sample inner die are arranged on the sample pedestal; the extension long barrel is arranged on the upper end of the sample outer die; and the intension long barrel is arranged on the upper end of the sample inner die. The compactor includes a planarization ring, a lower force transmission barrel, an upper force transmission barrel, a cover plate of a compaction barrel, a compacting hammer, a guide rod and a displacement restrictor, wherein, the planarization ring is disposed on the lower end of the lower force transmission barrel; the upper force transmission barrel is disposed below the cover plate of the compaction barrel; the guide rod is arranged on the top of the cover plate of the compaction barrel; the compacting hammer is arranged on the guide rod; and the displacement restrictor is disposed on the upper end of the guide rod. The invention has the advantages of simple usage, convenient operation and saved test time, and can prepare uniform and standard remodeling sample, thus providing significant help for remodeling sample test of the hollow columnar torsion shear apparatus.

The invention discloses a method for identifying unconventional cells in a pathological section, comprising: preprocessing an electronic scanning pathological section to obtain an effective discriminating region, inputting the effective discriminating region into a full convolution network to be pre-trained, then replacing the full convolution network head fine-tuning network with a fully connected layer so that the full convolution network has an ability to extract unconventional cell features so as to determine the locations of unconventional cells and classify the effective discriminatingregions effectively; in combination with the prediction result vote of multiple common classification networks, outputting stable classification results. The identification method of the invention canautomatically discriminate the probability of existence of unconventional cells in each 20* magnified field of view in the pathological section, and outputs the unconventional cells with a probability value over 0.5 as a recognition result, greatly reduce workload of the artificial screening pathological section, and can quickly and accurately screen out the unconventional cells.

The invention discloses a massive real-time data load simulation testing cloud platform for a smart power grid, and a testing method of the cloud platform. The cloud platform comprises a virtualization unit, a central controller module and agent modules, wherein the virtualization unit virtualizes a plurality of virtual machines; the central controller module is arranged in the virtual machine to form a central controller; the agent modules are stored in the central controller in forms of virtual machine mirror image documents, and activated to form agency servers after the central controller is applied to start the virtual machines; the central controller applies the cloud platform for enough virtual machines according to testing plans in different scales; and agency server simulation monitoring devices send massive monitoring data to the servers, and test the performance of the servers. According to the cloud platform and the testing method, powerful computing resources of cloud computing are depended on; the massive virtual machines are applied from the cloud platform; the massive data of the smart power grid is tested by the agency server simulation monitoring devices; and the cloud platform has the benefits of simple structure, low input cost, convenience in use, wide testing range and good testing effect.

A method for orienting a parallax barrier screen on a display screen with picture elements x(i,j) in a grid comprising rows i and columns j for the purpose of producing a display screen for three-dimensional representation. This method includes the steps of: temporary application of a positioning marker, observation of the positioning marker by means of a camera, relative orientation of the display screen, removal of the positioning marker, positioning of the parallax barrier screen in front of the picture area of the display screen display of a test picture, which comprises various views, where k=1, . . . , n and n=6 or n=7, on the picture elements x(i,j) with rows i and columns j, observation of the displayed test picture through the parallax barrier screen by the camera, orientation of the parallax barrier screen in front of the display screen. The method according to the invention can be carried out quickly and is therefore suitable for industrial use for the manufacture of display screens for three-dimensional representation.

The invention discloses an end face torsion frictional wear testing machine and an end face torsion frictional wear testing method. The testing machine comprises a transmission device and a pressure loading device, wherein the transmission device comprises a servo motor, a speed reducer, an eccentric wheel and a connecting rod; and the pressure loading device comprises a force sensor, a thrust ball bearing, a fixing piece, a spindle, a turntable, a turntable connecting rod, a tray, a torque sensor, a lifting shaft, a sliding sleeve and a hydraulic cylinder. A test piece is axially pressurized through the hydraulic cylinder, a connecting rod transmission mechanism drives the test piece to perform frictional torsion, a frictional torque value is measured through the torque sensor, and a positive pressure value is measured through the force sensor so as to obtain a friction coefficient. An end-face contact torsion frictional wear test under different working conditions can be simulated by setting different positive pressures, torsion frequencies and the like, and the frictional torque is accurately measured; and the loading is stable and accurate, the impact is low, and dynamic loading can be realized. Moreover, the machine is simple in structure, convenient to operate and good in testing effect.

The invention discloses a method for producing a hot-melt-adhesive aluminum-plastic composite tape. The method provided by the invention comprises the following steps of: manufacturing a composite semi-finished product of aluminum foil and plastic thin film, preparing a hot melt adhesive, coating the hot melt adhesive, drying the hot melt adhesive, cooling, coiling, and cutting. On the productionline of a PVC (Poly Vinyl Chloride) cable sheath, the hot-melt-adhesive aluminum-plastic composite tape and the sheath material can be bonded together by utilizing the temperature of the sheath when the PVC cable sheath material is extruded; the adhesive force is strong and the testing performance is good; and when a user strips the cable PVC sheath, the hot-melt-adhesive aluminum-plastic composite tape can be easily stripped so that the procedure of stripping two times is omitted, the mounting time is greatly saved and the damage on the cable is reduced. The hot-melt-adhesive aluminum-plastic composite tape manufactured with the method can be widely applied to a communication cable industry, and can propel the application reformation of the communication cable industry on the hot-melt-adhesive aluminum-plastic composite tape and also exploit a new application market of the hot melt adhesive.

The invention relates to a ship-shaped switch fatigue test device which is used for testing a ship-shaped switch comprising two press ends. The ship-shaped switch fatigue test device comprises a working platform, a bracket, a first drive device and a second drive device, wherein the working platform is used for fixing the ship-shaped switch; the bracket is fixed on the working platform, and a press column for pressing the ship-shaped switch is arranged on the bracket; the first drive device is used for driving the press column to move up and down so as to press the ship-shaped switch; and thesecond drive device is used for driving the press column to horizontally move above the ship-shaped switch. The ship-shaped switch fatigue test device can carry out a fatigue test on a plurality of ship-shaped switches simultaneously and improves the test efficiency, the force and the frequency for pressing the ship-shaped switch each time keep consistent, and the test effect is better.

The invention discloses a measurement learning method and system for pedestrian re-recognition. Implementation of the method comprises the steps of collecting feature vectors of a pedestrian target under two cameras, building a positive sample pair feature vector set and a negative sample pair feature vector set, calculating the distance of positive sample pair feature vectors and the distance of negative sample pair feature vectors, restraining the negative sample pair feature vectors by adopting dual thresholds, building a measurement matrix based loss function under distance constraint conditions of the positive and negative sample pair feature vectors, and iteratively updating the measurement matrix by taking the minimum loss function value as the target. The measurement learning method can effectively reduce influences imposed on matrix learning by irrelevant variables such as image background and noise, so that occurrence of an overfitting phenomenon is avoided, and the acquired measurement matrix is high in generalization ability.

The invention discloses a game program test method, device and system, wherein the game program test method comprises the following steps that a game program runs, wherein the game program includes all assemblies in a game scene; a first instruction sent by a test unit is received, wherein the first instruction includes the test instruction and an identification code of the assembly to be tested; the test operation is executed on the assembly corresponding to the identification code. When the embodiment of the invention is adopted, the test efficiency and the accuracy of the game program can be improved.

The present invention discloses a pedestrian repeat identification measurement learning method. The method comprises the following steps: establishing the set of pedestrian target features in different cameras; employing the Mahalanobis distance measurement mode, adding the constraint condition to restrain the feature measurement distance of the same target in different cameras to be zero and restrain the feature distance of different targets to be a constant [Mu] ([Mu]>0); and finally, establishing a loss function and optimizing the structure, obtaining an optimal measurement matrix satisfying the constraint condition through iteration by employing the projection gradient descent method, and completing the measurement learning process. The pedestrian repeat identification measurement learning method can effectively solve the problems of the overfitting phenomenon and measurement matrix sensitive to the noise in the current measurement learning method, and is suitable for the pedestrian repeat identification application occasions in complex scenes.

The invention relates to a test bench with double combustion chambers, double superchargers and low cycle fatigue based on a self-circulation mode, belonging to the technical field of power machinery. When the test bench with superchargers and low cycle fatigue which adopts a self-circulation principle is started and works, an external gas source firstly supplies gas to the combustion chambers and is closed after the superchargers stably runs, and a turbine and a compressor form self circulation, thereby reducing the dependency to power and the consumption of power, only needing fuel oil with a certain quantity and lowering the requirement of a low cycle fatigue test to compressed air and further reducing the requirement to an air compressor. In the test bench, air flows are respectively supplied to turbines of the two superchargers by adopting the two combustion chambers, and a measure that a flow distribution valve is installed before each combustion chamber enables the test bench with the double combustion chambers, the double superchargers and the low cycle fatigue to realize different gas inlet temperatures of each supercharger, thereby the mechanical load and the heat load needed by the low cycle fatigue test is changed, and the high temperature resistance requirements of materials of the flow distribution valve is reduced with high performance price ratio.

The invention provides a device for detecting and testing a high-temperature valve based on an air heating system. The device comprises an air compressor, a heating tank, a detection device and a buffer tank. The air compressor is connected with the heating tank through a steel pipe. A pressure sensor and a temperature sensor of the heating tank are arranged at the top of the heating tank. An air heater is arranged at the bottom of the heating tank. The heating tank is connected with an inlet of the valve to be tested through a first test pipeline. The first test pipeline is provided with an electric check valve. The detection device comprises a detection table and a test device. The valve to be tested is arranged on the detection table. The test device comprises a high-temperature flow meter, a torque test device, a differential pressure gauge and an ultrasonic leakage detector. An outlet of the valve to be tested is connected with the buffer tank through a second test pipeline. The device can simulate the actual working condition in a factory and detect the high-temperature medium circulation performance of the high-temperature valve.

The invention discloses a pressure head device for loading normal triaxial rheology and testing acoustic emission under high confining pressure. Vaseline is applied on a piezoelectric ceramic surface of a sensor, the sensor is placed into a sensor room and fixed at the bottom, a flexible spacer is placed between the sensor and a fastening bolt, the fastening bolt, a side seal ring and a side seal cover are installed in a side seal chamber through a slot of the fastening bolt, a sticky steel type structural adhesive is poured into a recess part and an outlet hole of the side seal cover, a main seal ring is arranged into a seal groove, a main seal cover and a pressure head seat body are sealed through the bolt of the main seal cover, a storehouse seal ring and a storehouse seal cover are installed in a storehouse seal chamber, a lower pressure head centering guide slot centers the center of a testing system pressure axis, an upper pressure head is arranged on a rock sample, and coaxial cables of the upper pressure head and the lower pressure head are linked through convex-concave joints of coaxial cable yarns. The invention is widely used for indoor emission tests of failure mechanisms, failure modes and damage evolution rules of soft and hard rocks in the rheology process.

The invention provides a crowdsourcing test method. The crowdsourcing test method comprises the following steps: a test client side is used for sending characteristic information of the test client side to a test server; the test server is used for selecting a to-be-tested client side used for executing to-be-tested service according to the received characteristic information of at least one test client side; the test server is used for sending a to-be-tested service list to the to-be-tested client side; the to-be-tested client side is used for testing the to-be-tested service in the to-be-tested service list to obtain a test result of the to-be-tested service; and finally, the to-be-rested client side is used for sending the test result to the test server. The crowdsourcing test method used for testing network application service is used for remarkably improving the test result and effectively reducing the test cost.

This invention relates to magnetic liquid surface viscosity test meter and its method, which adopts adjustable magnetic stator and rotor axis with high conductive magnetic cover matched with temperature measurement device and non-contact speed meter. The device is located with high conductive magnetic cover and adjustable permanent magnetic iron stator with liquid gap and the temperature measurement device and the stators are located with multiple heat couple through rotation axis moving in the stators and adopt direct current constant torque motor speed changes to test torque and adopts imbedded magnetic to control added magnetic field with the magnetic field direction vertical to the shearing surface to realize the magnetic flow viscosity testing.

The present invention discloses a complete earth pressure balance shield construction soil mass improvement test method, and belongs to the technical field of the tunnel construction. According to the present invention, a set of test methods for evaluating commonly-used additives in the shield construction and performances of the improved soil mass are designed; a foam test and a mud test are adopted to prepare and evaluate the performances of the additives; a slump test, a stirring test, a friction test, and an earth pressure tank model test are adopted to evaluate the performances of the improved soil mass, and study the fluidity, the vicidity, the friction performance, the permeability and the force transmission performance of the improved soil mass, determine the performance evaluation standard of the improved soil mass, and provide an additive proportion optimizing scheme for the earth pressure balance shield construction. With the set of the test methods and the process, the performances of the additives and the improved soil mass can be comprehensively evaluated; the test scheme is scientific and reasonable; the applicable soil mass of the test method has wide types; the test effect is significant; the test method and the evaluation standard are provided for effectively and economically adopting the additives for improving the soil mass in the earth pressure balance shield construction in different stratums.

The invention discloses a multifunctional hybrid power general test stand and a test method, relating to the hybrid power test field. The multifunctional hybrid power general test stand consists of an engine, a coupler, an ISG motor, a speed changer, a motor, a sensor, a power synthesis device, a sensor, a dynamometer, an inertia device, a brake, an engine ECU, a rectification inverter, a battery-super capacitor energy driving system, a general control system consisting of controllers of all parts and a CAN bus, and a monitoring control computer. The test device can simulate the most of the operation conditions of the hybrid vehicles, provides a test platform for the development of the hybrid vehicle multi-energy-source control and the regenerative braking function and can provide and finish the various performance tests related to the hybrid power vehicle through changing the mutual connection modes between various members of the device and the control modes of various members.

The invention discloses an image lossless compression encryption joint algorithm based on multiple kinds of chaos, which belongs to the technical field of multimedia information safety. In view of high safety requirements of the image lossless compression algorithm SPIHT, an image lossless compression encryption joint algorithm based on multiple kinds of chaos is designed. The algorithm is designed to generate an encryption pseudo random sequence which is safer and is not easy to be broken, a wavelet transform coefficient matrix is encrypted in a mode of design local diffusion and overall scrambling, and during an SPIHT coding process, and multiple turns of encryption are carried out on a sorting scanning part. Theoretical analysis and experimental results show that the algorithm of the invention has the advantages that the encryption speed is quick; the safety is high; influences on a compression ratio are few; an image file can be kept to be lossless; and the application prospect and the practical value are wide.

The invention discloses a long-term bearing test monitoring device for a large-size cuboid coal and rock sample, and relates to the technical field of rock mechanics tests. The long-term bearing test monitoring device comprises an upper pressing plate, a bottom plate, a lateral confinement restraining plate, an upper stress sensor locating plate, a bottom stress sensor locating plate, a lateral stress sensor locating plate and a displacement sensor locating plate. A space which is formed by the upper pressing plate, the bottom plate and the lateral confinement restraining plate and is approximately in a hexahedron shape is designed for monitoring the coal and rock sample to be tested. Stress sensors are arranged on the inner side face of the upper pressing plate, the inner side face of the bottom plate and the inner side face of the lateral confinement restraining plate respectively, displacement sensors are symmetrically arranged on the front side face and the rear side face of the whole device, the stress changes of different points of all non-free faces of the large-size cuboid coal and rock sample and the transverse deformation condition of different points of all free faces under long-term bearing are accurately tested, and then the mechanics characteristics and failure mode of the large-size cuboid coal and rock sample in the long-term bearing process are analyzed. High practicality is achieved.

The invention discloses an avalanche energy tester of a power MOSFET device, comprising a front-end avalanche testing circuit and a back-end avalanche current sampling circuit. The hardware structure of the front-end avalanche testing circuit comprises an adjustable direct current power supply which is connected with a fuse, an MOSFET device, an inductor, a current sensor and an MOSFET device to be tested successively to form a circuit; an electrolytic capacitor and a ceramic capacitor are paralleled between the drain electrode of the MOSFEF device and the source electrode of the MOSFET device to be tested; a diode is connected between the source electrode of the MOSFET device and the source electrode of the MOSFET device to be tested; and the structure of the back-end avalanche current sampling circuit is as follows: a signal conditioning circuit and a reference source circuit are connected with an analog-to-digital converter, and the analog-to-digital converter is connected with an FPGA control logic which is respectively connected with a test machine signal connector, an MOS driving circuit and a separator signal connector. The tester in the invention can provide high instantaneous current to test the avalanche energy.

The invention discloses an auxiliary automatic focusing system on an optical imaging system and an automatic focusing method for matching with the optical imaging system to realize automatic focusing. An auxiliary automatic focusing device comprises an image receiving device (5) and at least one image analysis and processing system (6); the image receiving device (5) transforms a received optical image signal of an target (7) into an electrical signal which is then transmitted to the image analysis and processing system (6); the image analysis and processing system (6) calculates the divination value of the captured image and gives out the information of the divination value; an object stage (1) moves up and down driven by hand or by the automatic driving device, and stops moving when the gap between the definition value of the image of the target (7) and the maximum definition value is in a permissible range. The auxiliary automatic focusing system can realize automatic focusing without changing the optical and mechanical mechanism of the optical imaging system, can be set according to the demand for different accuracies of focusing and speeds and can adapt to the demands of different cases.

The invention discloses a system for testing comprehensive performance of a metal roof. The system comprises an upper tank body (1), a lower tank body (2), a sealing piece (18), a support (21), a first air supply / exhaust device, a pump (6), a shower pipe (60), a shower nozzle (61), a refrigerator (7), a refrigerating pipe (71), an electric control device (9), a hanging rod (11), a displacement sensor (12), an electric heater (13), a net rack (14), a temperature / humidity sensor (15), and a wind pressure sensor (91), wherein a closed space is formed by the upper tank body (1) and a metal roof testing piece (8); a closed space is formed by the lower tank body (2) and the metal roof testing piece (8); the first air supply / exhaust device comprises a first fan (3) and a reversing valve (5); a reversing device is arranged in the valve body of the reversing valve (5); when the reversing device is in a first reversing state, the first fan (3) exhausts air from the upper tank body (1); and when the reversing device is in a second reversing state, the first fan (3) supplies air to the upper tank body. The system for testing the comprehensive performance of the metal roof can be widely applied to the field of test of metal roofs.

The invention discloses a vibration fault diagnosis method for a medium-speed coal mill and belongs to the coal mill fault diagnosis method technical field. According to the method, fault characteristic analysis is carried out the vibration of the coal mill, so that obtained current of the coal mill is an important monitoring parameter of the vibration fault analysis of the coal mill; four auxiliary variables, namely, the wind pressure of the outlet of a mill, the coal feed quantity of a coal feeder, the primary air quantity of the inlet of the mill, and the temperature of the outlet of the mill, are screened out through the correlation analysis of historical data; the current is predicted through the four variables; and the difference of actually-measured current and the predicted current is obtained; the current residual sequence of the coal mill is adopted to construct the vibration quantity of the coal mill; three-level wavelet packet decomposition is carried out the current residual sequence of the coal mill, so that the energy ratio of eight frequency bands can be obtained; and the energy ratio of two kinds of faults is statistically analyzed, so that the characteristic quantities of a fault that the abrasion of a grinder roller is serious, and a fault that fed objects in the coal mill are abnormal, can be distinguished obviously. The diagnosis method has the advantages of high diagnostic accuracy and good test effect.