101results about How to "Improve trial safety" patented technology

The invention discloses a plate clamper platform for a falling weight impact test, and an impact speed measurement method. The plate clamper platform comprises a clamper structure, a supporting lifting structure and a laser sensor, wherein the clamper structure comprises a plate clamping device, a multi-angle rotation device and a clamper bottom plate, the multi-angle rotation device comprises wall plates, wall plate bolts and a bottom plate bolt, each wall plate is provided with a central hole and two arc-shaped grooves, the two arc-shaped grooves are symmetrically arranged relative to the central hole, clamping plates can rotate along the arc-shaped grooves after the wall plate bolts are completely loosened, the supporting lifting structure comprises a platform and a lifting driving device, the clamper bottom plate can rotate by adopting the bottom plate bolt as the center and can slidably move along a straight strip hole, and the laser sensor is arranged below the weight tray positioned on the periphery of a hammer head. With the plate clamper platform and the impact speed measurement method of the present invention, the composite material plate specimen can be tightly clamped, the multi-angle impact on the specimen can be achieved, and the speed change during the drop hammer falling and impact process can be real-timely measured.

The invention discloses dynamic impact test equipment. The dynamic impact test equipment comprises a ground rail, a counterguard wall surface, a trolley, a traction device, a braking device, a cushioning device and a test recording device, wherein the counterguard wall surface is provided with a test sample piece. The trolley is arranged on the ground rail, can run along the ground rail and is provided with an impact device. The impact device can run together with the trolley, can slide on the trolley under the effect of inertia and then impacts the test sample piece which is installed on the counterguard wall surface. The dynamic impact test equipment can conduct a high speed dynamic impact test of automobile body components and parts and is simple in structure and low in cost.

The invention provides a semi-physical simulation device and a simulation method for a combined gas turbine and gas turbine power generation unit of a ship, and relates to a simulation device and a simulation method for the combined gas turbine and gas turbine power generation unit of the ship, aiming at solving the problem that the existing combined gas turbine and gas turbine power generation unit is low in simulation precision and higher in risk of the test process. Aiming at the simulation demand of the combined gas turbine and gas turbine power generation unit of the ship, a practical physical part is added on the basis of digital simulation of the conventional computer, so that a simulation system is more approximate to the running status of a real machine, and is high in simulationprecision. Meanwhile, after simulation is carried out on the combined gas turbine and gas turbine power generation unit of the ship by the semi-physical simulation device and the simulation method, the test debugging quantity of a full-physical test table can be greatly reduced, tests which cannot be performed under the status of the real machine can be performed, and the test security can be greatly improved. Therefore, the invention is applicable to the semi-physical simulation for the combined gas turbine and gas turbine power generation unit of the ship.

The invention provides a point load tester and a point load testing method. The point load tester comprises a bearing box which is used for placing and fixing a rock test block, wherein the bearing box comprises an upper plate, a lower plate and a side plate; the lower plate is connected with a bearing box main body through an elastic connection part; the elastic force of the elastic connection part is greater than the sum of the gravity of the rock test block and the lower plate, and the rock test block can move upward along the lower plate under the action of the elastic force of the elasticconnection part after the rock test block is put into the bearing box until the rock test block abuts against an upper tapered pressing head, so that the rock test block is fixed. According to the point load tester provided by the invention, the rock test block does not need to be manually grasped by hands in a point load testing process, so that the safety hidden dangers are eliminated, the convenience of operation is improved and manpower is saved; The upper plate and the side plate of the bearing box have an anti-splashing effect on the rock test block and the testing safety is enhanced; the possibility that small blocks formed by cracking the rock test block collapse and move for a long distance is also avoided, and the small blocks are convenient to splice and recover at a later period.

The invention discloses a method for evaluating the insulation state of electrical equipment. A matrix beam algorithm is utilized to identify equivalent circuit parameters of an expanded Debye model of the electrical equipment according to polarization and depolarization current for time-domain dielectric response of the electrical equipment, and then insulation state parameters such as a dielectric loss are calculated to evaluate the insulation state of the electrical equipment. The method comprises the following steps of firstly, measuring the polarization and depolarization current of the electrical equipment and then constructing a Hankel matrix by using the depolarization current as parameters; secondly, carrying out singular value decomposition on the Hankel matrix and judging a signal subspace and a noise subspace according to a singular value in a singular value curve in order to determine the number of relaxation branches and relaxation parameters of the expanded Dubai model;finally, using the determined relaxation branches for constructing the insulation-expanded Debye model of the electrical equipment and calculating the insulation state parameters such as the dielectric loss according to the model. Therefore, an accurate and reliable diagnosis method is provided for evaluating the insulation state of the electrical equipment.

The invention relates to a semi-physical simulation device and a simulation method of a ship gas turbine generator set. The device and the method solve the problems that the simulation accuracy of the existing gas turbine generator set is low and the risk in the test process is high. Aiming at the need of simulating the ship gas turbine generator set, on the basis of the traditional computer digital simulation, by adding partial physical devices, a simulation system is enabled to get closer to the running state of a real generator. At the same time, by using the device and the method to simulate the ship gas turbine generator set, the debugging quantity for the test of the real generator can be greatly reduced, tests which cannot be conducted in a real generator state can be conducted, the test expenses are saved and the test safety is increased. The device and the method are suitable for the semi-physical simulation of the ship gas turbine generator set.

The invention provides a device for testing the fire protection ability of a pipeline. The device comprises a combustor, a sensor and a data collection system, wherein the combustor is used for combusting the pipeline, and an ignition region is formed by a flame region of the combustor; the sensor is used for sensing at least one physical parameter of the pipeline and/or the other pipeline in an/or out of the ignition region and outputting a sensing result; and the data collection system is stored with a material property storage coefficient of the pipeline and a pre-warning value determined according to the relation between the coefficient and the physical parameter and is used for calculating the physical parameter of the pipeline according to a sensing result, carrying out comparison onthe physical parameter of the pipeline and a pre-warning value and emitting a warning signal when the physical parameter of the pipeline exceeds the pre-warning value. The invention further providesa method for testing the fire protection ability of the pipeline corresponding to the device.

The invention discloses a direct-current short-time supply interruption and supply voltage leap simulation test device, which comprises a manual switch connected with a system under test, wherein the manual switch is connected with a direct current supply voltage leap variable load in parallel, and is switched in a supply network through a first switching element; two ends of a second switching element are respectively switched in between the first switching element and the supply network as well as between the manual switch and the system under test in parallel; and the first switching element and the second switching device are respectively connected with a microprocessor. According to the test device, the microprocessor can control to ensure the switching elements to be switched off completely, and the accurate time for switching off and switching on the two switching elements can be accurately controlled, so that the time for direct-current short-time supply interruption is accurately controlled; when a supply voltage leap simulation test is carried out, resistance has no need to be switched in manually, so that the labor intensity is reduced, and the test safety is improved; and the prolonged time for voltage leap is shorter, so that a current situation can be better simulated.

The invention relates to a brake-tire-ground inner rotary drum type inertia brake test bench. The test bench comprises a ground foundation, a transmission system, a brake system, a control system, and a detection system. An industrial personal computer sends a speed command to a PLC, adjusts the speed of a frequency converter by controlling the frequency converter so as to adjust the speed of a vehicle, sets the moving inertia of the vehicle through an inertia adjusting device, sets the pressure exerted by a hydraulic cylinder on the ground, brakes the wheels of the moving vehicle through a brake actuator, and acquires the braking parameters of the vehicle through corresponding sensors. The technical problem that the existing test device cannot truly reflect the actual braking process of a vehicle is solved.

The invention discloses a natural gas conveying pipe system pressure test device comprising a cryogenic liquid storage tank, cryogenic liquid pumps and an air-heated vaporizer, wherein the cryogenic liquid storage tank is connected with the cryogenic liquid pumps through a pipe, the cryogenic liquid pumps are respectively connected with an air return port and the air-heated vaporizer through a pipe, and the air-heated vaporizer is connected with a gas utilization point through a pipe. The natural gas conveying pipe system pressure test device has the following advantages: high-voltage test on a system can be completed in a short time, the test safety is high, tightness test can be immediately carried out, the test cycle is shortened, and cost is saved.

The present invention discloses a power cable frequency conversion resonance voltage-withstand test operation technology. The technology comprises the following steps: 1) preparing a test apparatus and device; 2) explaining work content, electrification positions, field safety measures and field work danger points to testers, and clarifying personnel division and the test program; 3) performing preparation prior to the text; 4) performing wiring and test; 5) ending the test; and 6) performing analysis of a test result and filling out a report. The operation technology has guidance and can give workers clear test steps when the power cable frequency conversion resonance voltage-withstand test is performed so as to test safety.

The invention belongs to the field of electric vehicle, and especially relates to a whole vehicle model system for a whole vehicle controller of a new energy vehicle. The whole vehicle model system ischaracterized by comprising a driver module, a whole vehicle controller module, a motor module, a transmission module, a main reducer module, a vehicle wheel module, a vehicle speed module and a battery module; wherein the driver module is connected with an input end of the whole vehicle controller module, an output end of the whole vehicle controller module is connected with an input end of themotor module, an output end of the motor module is connected with an input end of the transmission module and an input end of the battery module, an output end of the transmission module is connectedwith an input end of the main reducer module, an output end of the main reducer module is connected with an input end of the vehicle wheel module, and an output end of the vehicle wheel module is connected with an input end of the vehicle speed module. The whole vehicle model system of the invention has the beneficial effects that: the number of real vehicle tests is reduced, test safety is improved, test repeatability is improved, and whole vehicle development period is shortened.

The invention discloses a mixing and self-cleaning device for mixing a cement concrete and forming a test piece. The mixing and self-cleaning device for mixing the cement concrete and forming the testpiece comprises a mixing device, a lifting device, a vibrating device and an electronic platform scale, wherein a feed inlet is formed in the top part of the mixing device; a discharge hole is formedin the bottom part of the mixing device; the lifting device is arranged on the discharge hole of the mixing device; a mould and the electronic platform scale are arranged on the top part of the lifting device; a shovel plate is arranged at the free end of a stirring blade and contacts the inner wall of a mixing cylinder; and a cleaning nozzle is arranged on the top part of the mixing cylinder andcommunicates with a water tank through a water passing pipeline. The shovel plate contacts the inner wall of the mixing cylinder, so that the cement concrete on the inner wall of the stirring cylinder can be shoveled so as to be uniformly mixed, and the instrument can be conveniently cleaned; through additionally arranging a cleaning device, the automatic cleaning work of a mixer can be realized,so that not only can manpower be saved maximally, but also the test time can be effectively saved; and through arranging the electronic platform scale on an operating floor, the quality of the cementconcrete test piece can be controlled through weighing, and the standardness of the test piece is further controlled.

The invention discloses a pre-processing method for determination of phosphorus. The method comprises steps as follows: performing first-level digestion on a dairy product to obtain a first-level digestion product; carbonizing the first-level digestion product to obtain a carbonization product; adding hydrogen peroxide to perform second-level digestion on the carbonization product to obtain a second-level digestion product. The invention further discloses a method for detecting phosphorus in the dairy product. The methods adopted for performing pre-processing of phosphorus determination and/or determination of phosphorus content of the dairy product have the advantages of safe detection, low environmental pollution, high efficiency and low cost.

The invention relates to a high-voltage transformer test protection device with a multi-protection function. The high-voltage transformer test protection device is respectively connected with an infrared radiation alarm device, an over-current protection device and a high-voltage transformer test control power supply. The high-voltage transformer test protection device comprises a leakage protection air switch, an overall power access circuit, a grounded detector, a transformer, an enable signal converter, an alternating current contactor and a voltage regulator, wherein the leakage protection air switch, the overall power access circuit and the grounded detector are sequentially connected; the grounded detector is respectively connected with the enable signal converter, the alternating current contactor and the transformer; the alternating current contactor is connected with the transformer; and the enable signal converter controls the switching-off or switching-on of the alternating current contactor according to enable signals of the infrared radiation alarm device, the over-current protection device and the grounded detector. Compared with the prior art, the high-voltage transformer test protection device improves test safety and reliability and has the multi-protection function.

The invention discloses a GTEM-based antenna lightning surge coupling test method. An antenna lightning surge coupling test system based on a GTEM is constructed, wherein the constructed system consists of a test platform construction module, a lightning electromagnetic pulse peak electric field strength adjustment module, an antenna lightning surge voltage measurement module, a lightning electromagnetic pulse coupling coefficient determination module and a lightning surge voltage index determination module. The test platform is built by using the test platform construction module; the lightning electromagnetic pulse peak electric field strength adjustment module controls and adjusts the lightning electromagnetic pulse peak electric field strength; the antenna lightning surge voltage measurement module measures a lightning surge voltage of a measured antenna; the lightning electromagnetic pulse coupling coefficient determination module determines a lightning electromagnetic pulse coupling coefficient; and the lightning surge voltage index determination module determines a lightning surge voltage index.

The invention belongs to the technical field of environmental tests, and discloses a grid disc supporting assembly and an environmental test box, the grid disc supporting assembly comprises two groups of supports and a slide rail, and the two groups of supports are respectively arranged on two opposite inner walls of the environmental test box; a plurality of variable-diameter mounting holes are formed in the support in the vertical direction, and the variable-diameter mounting holes comprise first holes and second holes which communicate with each other; the at least two sliding rails are connected to the two sets of supports respectively, variable-diameter installation heads are arranged on the sliding rails, each variable-diameter installation head comprises an installation cap and an installation neck, the variable-diameter installation heads and the variable-diameter installation holes are selectively installed in a matched mode so that the installation heights of the sliding rails can be adjusted, disassembly and assembly are convenient and fast, and the two ends of the grid disc are supported on the top end faces of the two sliding rails. According to the invention, the grid disc is in surface contact support with the slide rail, so that the support stability of the grid disc is improved; clamping grooves or clamping protrusions do not need to be machined on the grid disc, the strength of the grid disc is ensured, and deformation is avoided; and the height position of the grid disc is realized through switching of the slide rails on the bracket, so that the test safety and efficiency are greatly improved.