131results about How to "Save test cost" patented technology

The invention discloses an automotive suspension test bed, relates to the technical field of fatigue verification for an automotive suspension and provides the automotive suspension test bed which is simple in structure, high in strength and capable of shortening the development and verification period of the automotive suspension and reducing test expenditures. The automotive suspension test bed comprises a plurality of stand columns, wherein a clamp plate with the height and the angle adjustable is installed on each stand column, and a calibrating mark is further arranged on each stand column and used for calibrating the installation position of the corresponding clamp plate. The automotive suspension test bed further comprises a loading mechanism used for being connected with a loading device, the stand columns are assembled with an automotive frame through the clamp plates in a matched and connected mode, the loading mechanism is connected with a brake disc on the frame, and the direction of the loading device is controlled so that the loading mechanism can perform suspension endurance verification under different working conditions. The automotive suspension test bed is mainly used in tests of fatigue verification for the automotive suspension.

The invention discloses a model shield tunneling machine starting device capable of achieving self-balancing of counter-force. A model shield tunneling machine is arranged on the tunneling side of a test soil box frame, and hydraulic jacks are arranged at one end, far away from the test soil box frame, of the model shield tunneling machine. The model shield tunneling machine starting device comprises a counter-force seat and a guide rail, wherein the counter-force seat and the guide rail are both installed on the work ground, the counter-force seat is arranged on one side, far away from the test soil box frame, of the model shield tunneling machine, the counter-force seat and the test soil box frame are connected with each other through cross beams, and the model shielding tunneling machine is arranged on the guide rail. The model shield tunneling machine starting device capable of achieving the self-balancing of the counter-force can provide the counter-force to the model shield tunneling machine, the counter-force is transmitted to the test soil box frame through the cross beams, and therefore the self-balancing of the counter-force is achieved. Due to the fact that a reaction wall does not need to be built in the process of the model test, on the one hand, the occupied site space of test equipment is reduced and test expense is saved, on the other hand, guide can be provided for starting of the model shield tunneling machine, consistency of the staring direction and the axis direction of a tunnel cave to be built as planed is guaranteed, and posture change of the shield tunneling machine is avoided.

The invention discloses an electric bus composite braking hardware-in-the-loop test platform and method based on an electronic-controlled braking system. The test platform is composed of a gas-generating component, the electronic-controlled braking system, a traditional barking component, a wheel speed simulation component, a single chip microcomputer controller, an upper computer and a target machine. The hardware-in-the-loop test platform takes a third generation electronic-controlled braking system of the WABCO company as a basis and combines related hardware and software, so that precise adjustment of braking pressure of front and rear axles and four wheels is achieved, and the control problem of normal braking and emergency braking of an electric bus is solved through a regenerative braking control strategy and an ABS control strategy; by means of the test platform and method, combined testing of the electronic-controlled braking system and a regenerative braking system of the electric bus is achieved.

The invention relates to an aircraft supporting-fixing method in static strength test, in particular to an aircraft-supporting method in static strength test for fore fuselages. The method for supporting static test for light-aircraft fore fuselages comprises that: a straight frame of an aircraft rear fuselage is provided with two clamp hoops; the clamp hoops and the fuselage are tightly clamped; each clamp hoop is connected with two upright columns arranged on two sides of the fuselage; the width of a clamp-hoop edge strip is not greater than that of a fuselage edge strip where the clamp-hoop edge strip is arranged; one clamp hoop is arranged on the fuselage straight frame between aircraft wings and an aircraft horizontal tail, and the other clamp hoop is arranged at the aircraft tail end after the aircraft horizontal tail is detached; a longitudinal part is arranged on the fuselage between the two clamp hoops; and the longitudinal part is a long truss on the fuselage. The method for supporting static test for light-aircraft fore fuselages has the advantage of effectively solving the problem of supporting the whole fore fuselage of a light aircraft in static strength test, along with simple operation, little influence on test results, high precision, low cost and great practical application value.

The invention discloses a method and a switch for testing throughput of communication equipment. The method comprises the steps that output/input ports for testing the throughput of the communication equipment on the switch are configured, and are connected with the output/input ports of the communication equipment and data messages in two preset formats are constructed in the switch; in a preconfigured loopback port, a message flow reaches a linear speed through loopback copying and a data stream is generated; the data stream is forwarded from the preconfigured output port to the communication equipment at the linear speed, the number of transmitted packets is counted, data packets transmitted by the communication equipment are received from the input port corresponding to the output port on the switch, the number of received packets is counted and finally the throughput of the communication equipment is tested according to the difference between the number of the received packets and the number of the transmitted packets of the ports of the switch. The method is simple to realize, the demands for throughput testing under the condition of different port rates can be met by conducting rate control at the output port of the switch, the expansion and the extension in the aspects of rate and port type can also be realized, and the testing resources and the testing costs are saved to a certain extent.

The invention discloses an accelerated degradation testing method for a nitrile rubber O-shaped sealing ring based on step stress, which includes the concrete steps: firstly, preliminarily testing the nitrile rubber O-shaped sealing ring; secondly, determining an accelerated simulation model and the stress level of a formal test; thirdly, testing step-stress accelerated degradation of the nitrilerubber O-shaped sealing ring; fourthly, arranging degradation data; and fifthly, building an accelerated degradation model for predicting the reliable life of the sealing ring. By means of applying the step stress, testing cost and testing time can be greatly reduced, and an example verification failure mechanism is unchanged. Evaluation of the degradation data is based on a plurality of degradation paths of a plurality of test specimens, errors caused by difference among the specimens can be greatly reduced, and the reliability of evaluation results is higher than that of aging life prediction.

The invention relates to a method for carrying out anchoring research on anchor rods with high-content expansive agents by the aid of CT (computer tomography) scanning technologies. The method includes steps of manufacturing surrounding rock mass from selected rock materials or rock-like materials and cutting materials and drilling the surrounding rock mass; arranging pressure sensors; arranging strain gauges; preparing expansive cement slurry; acquiring pressure data at different time points after the expansive cement slurry is poured; drawing time-varying images of compressive stress of the expansive cement slurry with different expansive agent contents; carrying out step-by-step pull-out tests and the like. The method has the advantages that the problem of high influence on internal CT values of existing anchoring systems due to the existence of metal during CT scanning can be solved; true research can be carried out on time-varying laws of the compressive stress of the expansive cement slurry of anchoring systems with the different expansive agent contents under the effects of ground stress and underground water, three-main-body and two-interface failure modes and evolution laws under the effects of the ground stress and the underground water and distribution laws of axial force and shear stress of the anchor rods, and laws of change of the pulling resistance along with the contents of the expansive agents can be ultimately obtained.

The simulation test bed comprises: car steering wheel, car steering column, electrically-driven power assisted steering unit, magnetic powder loader, corner sensor, servo motor, driving speed signal generator controlled by the electronic pedal, micro processor and computer. The input force moment of the steering wheel is manually provided by the test staff; the signal for simulating the road surface frictional resistance and the signal for simulating the road condition resistance are provided by the micro processor via the magnetic power loader and servo motor.

The invention discloses a clamp for a display vibration test and an installation method for the same. The clamp comprises a baseplate which is firmly installed on the surface of a vibration test table, a supporting frame disposed on one side of the base plate, a slide rail assembly disposed on left and right sides of the supporting frame and connected between the supporting frame and the baseplate, as well as an installation panel, wherein the slide rail assembly comprises a fixation base, a first slide rail and a second slide rail, and both the first slide rail and the second slide rails are equipped with arc slideways; and the bottom of the installation panel is in a hinged connection with the joint between the supporting frame and the baseplate, and the installation panel can move along the slideways and is used for firm installation of a display. Bolts penetrate the fixation base and the slideways and are screwed into studs on inner sides of left and right edges of the installation panel; the installation panel is rotated along the slideways with a rotary fixation hole of the fixation base as the axis till the angle of the installation panel is equal to a display truck loading angle; the baseplate is installed on the surface of the vibration test table by fastening bolts; and finally a test can be implemented. The clamp and the method disclosed by the invention can solve the technical problems that an existing vibration clamp with an overall frame structure has low flexibility, low universality, the high cost and long testing duration.

The invention discloses a method for rapidly identifying and screening anti-blight banana seedling. The method comprises the steps of establishment of banana seedling hydroponic system, inoculum preparation and inoculation, daily management of banana seedling, disease situation investigation and grading. Banana seedling stage inoculation and hydroponic identification method can effectively control interference due to differences in soil structure, nutrition, microorganism, etc., during banana seedling stage inoculation identification process, rapidly and accurately identify anti-blight bananaseedling, continuously identify large amount of tissue-cultured banana seedlings in small area, perform multiple times of identification in one year, improve test result reliability, shorten identification period, and save land occupation and test cost.

This invention relates to a method for testing RFID chips with digital signal and RF signal emit/identification circuit including that a digital signal generator of a test system generates a digital signal to generate a RF signal in conformity with the ISO standard by the RF signal emit/identification circuit, when the chip receives the said signal, it generates a return signal to be captured by the identification part of the RF signal emit/identification circuit and converted into a digital signal to be sent to the test system for judgment and comparison finally, thus reducing test cost and saving time.

A design method for a communication system reliability statistic test scheme on the basis of competing failure includes eight major steps: firstly, on the basis of a reliability requirement R0 of a system at a certain time and under certain conditions, the fact that the reliability of hardware is higher than the reliability requirement is determined; then a software reliability requirement R0S which is higher than the R0 is given, and the Bezier-Platt approximate calculation algorithm is used for calculating the lower confidence limit of software reliability to obtain a corresponding a failure-free statistic test scheme; hardware test data and software failure-free test time are combined for calculating the lower confidence limit of system reliability under a given task time t0; the lower confidence limit of the system reliability is compared with a system reliability requirement; whether the failure-free statistic test scheme is an optional scheme is judged; if the failure-free statistic test scheme is not the optional scheme, the software reliability requirement is improved and then searching is continued; and if the failure-free statistic test scheme is the optional scheme, according to economic feasibility and other actual conditions, the step that the R0S is adjusted for continuing the searching is chosen, or a final scheme is determined. Through the steps, the communication system reliability statistic test scheme which is economical and feasible and can meet project practical requirements can be sorted out.

The invention belongs to the technical field of geotechnical engineering model test equipment. The proposed geotechnical engineering anti-explosion structure model test device is composed of a side-limited box body and an explosion pit at the lower part, and is equipped with a matching wave-eliminating mechanism, a locking mechanism and a sliding Positioning mechanism; wave dissipation mechanism includes aluminum wave dissipation grid (21) and wooden wave dissipation plate (20); sliding positioning mechanism includes two-way jack cylinder (15), guide rail (17) and limit block (19); locking The mechanism is composed of a locking pull rod (3), a side limit connecting block (18) and a nut (2). The invention can simulate different explosion forms in equipment with moderate size; meet the convenient and feasible requirements for excavation of caverns, installation of enclosure structures and measurement equipment; it can be reused, and it is beneficial to observe the damage of structures in the test; The results can provide an important basis for underground explosion-resistant engineering design and scientific research.

The invention provides a vehicle body self-levelling test stand. The test stand comprises a road spectrum excitation device, a road spectrum excitation hydraulic system, a road spectrum excitation control system, a vehicle body self-levelling device, a vehicle body self-levelling hydraulic system and a vehicle body self-levelling control system, wherein the road spectrum excitation hydraulic system controls the extending speed and displacement of a piston rod of an excitation servo hydraulic cylinder corresponding to the road spectrum excitation device on the basis of received excitation signals of the road spectrum excitation control system to simulate actual complicated road conditions; under excitation of road spectrum excitation independent modules below the vehicle body self-levelling device, the vehicle body self-levelling control system generates corresponding vehicle body self-levelling control signals and sends the corresponding vehicle body self-levelling control signals to the vehicle body self-levelling hydraulic system on the basis of collected vehicle body posture information of the vehicle body self-levelling device to further control the extending speed and displacement of the piston rod of a levelling servo hydraulic cylinder corresponding to the vehicle body self-levelling device, so that self-levelling of a vehicle body is realized. According to the vehicle body self-levelling test stand, the actual complicated road conditions can be simulated, and the self-levelling function detection is realized.

The invention discloses an automatic test method and device for a DHCP (Dynamic Host Configuration Protocol) function of a router. The method comprises: step S010, creating and opening a test result record file; step S100, logging in an internet setting page of the router, configuring the router in a DHCP mode and storing the mode; step S200, testing a DHCP function test item, executing next step when the test succeeds, otherwise, writing the test result into the record file, and executing step S500; step S300, testing connection test items of the DHCP function item by item, and writing the test results into the record file according to the return values of the test items; step S400, judging the overall test result of the DHCP function according to the return value of each connection test item and displaying the overall test result; and step S500, ending the test of the current router. The automatic test method and device for the DHCP function of the router fulfill the purpose of reducing the automatic test time and cost of the DHCP function of the router.

The invention belongs to the technical field of aerospace nondestructive testing and in particular relates to a method for distinguishing damage degree of a C/C (Carbon-carbon) composite material structure based on an acoustic emission technique. When the damage degree of the C/C woven composite material structure is slight, the generation of tiny damage sources and the characteristics of generation of stress waves comply with stable probability distribution, and acoustic emission event counts, ringing counts, and energy counts grow in equal proportion; when the damage degree is serious, a group of impact chains comprising a large number of ringing counts and high energy counts appears, namely, inflection points appear in a curve on a correlation diagram of the ringing counts and the high energy counts, and the envelope line slope is obviously increased; for a C/C woven composite material in a specific structure, acoustic emission events comprising a large number of ringing counts and high energy counts appear, and the specific value of loads at the inflection points obviously appearing in impact counts, the ringing counts and the relevant curves and a final load is within a certain scope; a bearing load of the structure when an inflection point generates is recorded, and therefore, a damage load of a structure can be predicted.

The invention discloses a moonlet test basic information generation method based on a platform model. The moonlet test basic information generation method comprises the following steps: firstly, establishing digital platform models for different types of moonlet common platforms; according to the type of the common platform of a moonlet to be tested, selecting the corresponding digital platform model; according to the digital platform model, establishing a basic information database for the moonlet; according to the requirements of the subsystem of the moonlet to be tested, carrying out adaptability revision on information in the basic information database; adding the basic information of a loading subsystem and a data transmission subsystem into the revised basic information database; obtaining the test basic information database of the moonlet to be tested; and extracting the basic information which needs to be tested from the test basic information database of the moonlet to be tested by ground comprehensive test application software through an information retrieval extraction system for subsequently testing the moonlet. When the method is applied, the basic information database does not need to be established for each moonlet, test time and cost is saved, and a test period is shortened.

The invention provides a spaceborne computer system capable of be assembled on orbit. The system is characterized by comprising a data processing module and a hot plug permanent storage module, and the data processing module and the hot plug permanent storage module are in communication through a CPCI bus; the data processing module is used for state self-inspection and diagnosis, data management and task scheduling control, and management of the CPCI bus as a CPCI bus main control device; the hot plug permanent storage module is used for power management during on-orbit assembly, storage of user image data, and CPCI bus data communication responding to the request of a processor module as a CPCI bus terminal device. The spaceborne computer system capable of be assembled on orbit achieves hot plug operation of an embedded spaceborne computer module and can be used for on-orbit maintenance and service of various spacecrafts in future.

The invention discloses an arc wind tunnel test assessment method for a non-ablative thermal protection material/structure. The method comprises: conducting test state debugging; calculating a targettemperature of a surface of a test piece corresponding to an inflow state obtained by debugging; conducting a formal test; and adjusting operating parameters of equipment according to a temperature measurement result of the surface temperature of the test piece during the formal test. The method of the invention realizes real-time adjustment and precise control of the inflow state during the test.

The invention discloses a rotating measurement device for an outlet temperature field of an aero-engine combustion chamber. The rotating measurement device comprises a motor and a rotating disc whichare connected through a transmission mechanism, an angle sensor and a temperature-measuring sensing head are both mounted on the rotating disc and connected with a measurement and control computer, and the measurement and control computer is sequentially connected with a motor controller and the motor; the motor drives the temperature-measuring sensing head on the rotating disc through the transmission mechanism to rotate to the set angle position, and meanwhile, the angle sensor feeds back an actual angle position signal to the measurement and control computer; and comparison is conducted through software mounted on the measurement and control computer, if adjusting is needed, an instruction is sent out, the motor controller controls the motor to move so as to reach the right angle position, and data collection is conducted. The temperature measurement device makes up the deficiency of a traditional temperature field fixed rake measurement method, the requirement for the collecting and measuring density of the outlet temperature field in an HB7485 combustion performance test is met, and the effects of shortening the test period and saving the test cost are achieved.

The invention discloses a method for measuring the elastic modulus of a coating. When the coating is a single-layer coating, the method comprises the following steps: acquiring the elastic modulus Eq of a coating composite sample to be measured; acquiring the elastic modulus Es of a matrix material of the coating sample to be measured; respectively acquiring the thickness H of the matrix of the coating sample to be measured and the thickness h of the coating; and calculating the elastic modulus Ec of the coating of the coating sample to be measured according to a formula shown in the description, wherein A in the formula is h<4>, B in the formula is 4EsHh<3> + 4EsH<3>h + 6EsH<2>h<2> - Eq(H+h)<3>h, and C in the formula is Es<2>H<4> - EqEsH(H+h)<3>. The method uses a pulse excitation technology to realize rapid and accurate measurement of the elastic modulus of the coating sample.

The invention discloses an automatic centering device of an electric spindle reliability test platform based on drag loading, and aims to solve the problems of incapable of timely monitoring generation of singularity and elimination and time and labor wasting when adjusting centering of the test platform, the device comprises a spindle position adjusting part, a detection part and a monitoring andautomatic control part; the detection part comprises a supporting device, a feeding device and a detection device; the spindle position adjusting part is arranged at the middle position of an horizoniron through a first to forth static pressure sliding platform, wherein the first static pressure sliding platform and the second static pressure sliding platform are arranged at the left side of thehorizon iron, and the third static pressure sliding platform and the fourth static pressure sliding platform are arranged at the right side of the horizon iron; the detection part is arranged at themiddle position of the horizon iron through a first supporting base and a second supporting base, supporting devices are arranged at the front side and rear side of the spindle position adjusting part, and the feeding device is arranged on the supporting devices; a first laser centering instrument and a second laser centering instrument in the detection device are fixed on a fixing plate in the feeding device; and the monitoring and automatic control part is connected with the spindle position adjusting part and the detection part through wires.

The invention discloses a telescopic lining structure testing device for testing a characteristic curve of tunnel surrounding rock, is used in a variable stiffness simulation experiment of a telescopic indirect simulation tunnel lining for obtaining lining structure internal force and a surrounding rock-support characteristic curve. An upper arc sheet 1 and a lower arc sheet 2 both made of an aluminium alloy material are rolled to form a test cylinder. Edges of the upper arc sheet 1 and the lower arc sheet 2 are provided with U-shaped grooves, and the two arc sheets are movably connected at an equal interval through the U-shaped grooves adopting bolts. The upper arc sheet 1 and the lower arc sheet 2 have a transverse edge curve of a simulated practical tunnel. In the test, stress sheets and pressure boxes are arranged on inner and outer layers of a middle ring of the cylinder. According to the invention, a once-molded lining can be repeatedly applied to tunnel model tests, so that previous phenomena that a gypsum lining is adopted, multiple models are required once, a lot of labor, money and time is required are prevented. Simple and effective operability of a model test can be achieved through low cost, material waste is prevented, and test cost is lowered.

The invention provides a multi-vehicle-model simulation system based on a Linux dynamic link library and a working method thereof. The multi-vehicle-model simulation system comprises an upper computer, a simulator and an OBD terminal. The simulator is respectively connected with the upper computer and the OBD terminal. The simulator comprises a CAN bus transceiver, a vehicle-mounted OBD interface, a power supply module, an RS232 serial port chip, a Linux system, a main frame system and a dynamic library file. The Linux system is respectively connected with the CAN bus transceiver, the vehicle-mounted OBD interface, the power supply module, the RS232 serial port chip and the main frame system. The main frame system is also connected with the dynamic library file. Dependence of the OBD terminal product on a real vehicle in the test phase can be solved, and the requirement of testing multiple vehicle models in the office can be realized.

The present invention relates to a multi-functional vibration device comprising rotating frame assemblies disposed vertically at the left and right parts, a mounting plate assembly disposed horizontally between the rotating frame assemblies, and a test bed interface assembly located at the bottoms of the rotating frame assemblies. The two ends of the mounting plate assembly connected to the rotating frame assemblies are respectively provided with a rotating shaft at the central part and limiting bosses at the end parts. The multi-functional vibration device provided by the invention can realize the vibration requirements of the test product in three directions, and can also realize the vibration test of multiple products at the same time, satisfy the multiple requirements of the reliability enhancement test on the vibration direction of the product, and realize a multi-purpose device. The test time and the test cost are saved.

The invention discloses a heat distortion temperature measuring method for thermoplastic sealing stripes for furniture, comprising the following steps of: preparing a circular wind oven, a test board, a timer and samples; setting right temperature for the circular wind oven and putting the circular wind oven into the test board; after the temperature is stabilized to a set value, putting one sample, and observing for ten minutes in the terms of a graduated scale; if the sample has no distortion after ten minutes, raising the temperature, and observing for ten minutes again; if the sample has no distortion, raising the temperature again, and observing again; raising the temperature of 5 DEG and observing for ten minutes each time, till the sample starts distorting, and the temperature at the moment is the heat distortion temperature of the sample; and averaging values of all samples. The measuring method adopts the circular wind oven, the test board, the graduated scale and the like and controls the temperature by the circular wind oven so as to be used for directly measuring the heat distortion temperature of plastic sealing stripe products, and therefore the measuring method is simple and visual. The measured result self comes from the actual products, and thus the measured result is accurate. In addition, as the whole measuring method is simple, the testing cost and the testing time are greatly saved.