12results about How to "Avoid affecting test accuracy" patented technology

This invention discloses a continuous conductivity testing bench for lubricating grease and its testing method. The test bench includes a grease pump, a conductive base plate, a heating module, and an upper conductive plate. It can continuously measure the dynamic conductivity of the lubricating grease before and after breakdown and before and after blockage at a preset temperature, calculate the average conductivity during the continuous thickness change process, and conclude that the grease thickness is different when breakdown and blockage occur. It obtains the accurate values ​​of the grease thickness in the test area corresponding to each breakdown and blockage. In the blockage analysis, the volume of the grease to be injected into the test area is calculated by integration. Based on the instantaneous volume flow rate detected by the elliptical gear flow meter, the actual volume of the grease to be injected into the test area is calculated, and the flow rate of the grease pump is adjusted to ensure that the difference between the volume of the grease to be injected into the test area and the actual volume of the grease injected into the test area is within a preset range. This avoids the pressure changes caused by insufficient grease thickness or excessive grease affecting the test accuracy.

The utility model relates to the technical field of road tests, and discloses a road base material universal testing machine which comprises a machine base, a conveying base is fixedly installed on the bottom side of the machine base, a filtering box is movably installed on the inner side of the conveying base, and a water accumulation box is installed on the bottom side of the conveying base through bolts. The simulated road is placed on the inner side of the groove in the top side of the machine base, in the using process, through the partition plate, supporting uniformity can be improved, meanwhile, it can be avoided that the simulated road makes direct contact with the groove, and consequently the permeability of simulated rainwater in the later period is reduced; the electric push rod is started to drive the splash-proof cover to move downwards and extrude and limit the periphery of the simulated road, so that the situation that the test precision is influenced by side wings of the simulated road when rainwater is simulated is avoided, and in the rainwater simulation process, a water source is prevented from splashing under the action of the splash-proof cover, and the test efficiency is improved. And the viewing and observation of workers are influenced while the resources are wasted.

The invention provides a load loading device, a load test device, a load test method, a controller and a control system. The load loading device comprises a bottom plate, a loading tool and a loading mechanism, the bottom plate is used for placing a test element, and the loading tool is connected with the test element; the loading mechanism comprises an X-direction loading assembly, a Y-direction loading assembly and a Z-direction loading assembly; the X-direction loading assembly is connected with the first end of the loading tool and is used for applying an X-direction load to the test element; the Y-direction loading assembly is connected with the second end of the loading tool and is used for applying a Y-direction load to the test element; and the Z-direction loading assembly is connected with the third end of the loading tool and is used for applying a Z-direction load to the test element. According to the invention, the loading loads in the X direction, the Y direction and the Z direction can be conveniently regulated and controlled, so that the loading forces in the three directions can be simultaneously loaded on the loading tool, and the collected real load of a test element can be accurately reproduced.

The utility model provides a test system for simulating and detecting refrigerant leakage, which comprises a water pipeline simulation system in a heat pump unit. The heat pump unit inner water pipeline simulation system comprises a first check valve, a refrigerant leakage detection device in pipeline connection with the water outlet end of the first check valve, an exhaust tank connected with the water outlet end of the refrigerant leakage detection device and an electric stop valve connected with the water outlet end of the exhaust tank, and the refrigerant leakage detection device is electrically connected with the input end of the controller. The output end of the controller is electrically connected with the electric stop valve, a first safety assembly is installed at an exhaust port of the exhaust tank, an air inlet is formed in a pipeline between the first check valve and the refrigerant leakage detection device, and the gas filling system is connected with the water pipeline simulation system in the heat pump unit through the air inlet. According to the utility model, the refrigerant pressure and the leakage speed of the heat pump unit in different operation conditions can be simulated truly, the response time and the control function of the detection device can be verified effectively, the safety is high, and the time and the cost are saved.

The invention discloses a high-precision test pit water injection test device, and belongs to the technical field of test pit water injection. A high-precision test pit water injection test device comprises a soil insertion frame, sliding grooves are formed in the outer walls of the two sides of the soil insertion frame, sliding blocks are slidably installed on the sliding grooves, supporting blocks are welded to the sliding blocks, supports are welded to the two sides of the end face of the top of the soil insertion frame, vertical rods are arranged on the supports, first external threads are arranged on the outer walls of the vertical rods, and first external threads are arranged on the outer walls of the vertical rods. The vertical rod is connected with the support through a first external thread, a disc is installed on one side of the support through a rotating shaft, a second external thread is arranged on the outer wall of the disc, and the vertical rod and the disc are connected through the first external thread and the second external thread. The problems that in the prior art, a fixing structure for the measuring outer ring is lacked, so that when the measuring outer ring is inserted into soil, it cannot be guaranteed that the measuring outer ring is vertically inserted into the soil, and if the measuring outer ring inclines, the test accuracy of a test pit water injection test is affected are effectively solved.

The utility model discloses a testing device with a shielding function, which relates to the technical field of testing devices in the identification test process of nuclear power DCS (Distributed Control System) and reactor core and ex-reactor nuclear testing system products, and comprises a cabinet body, the upper half part of the cabinet body is of a cuboid structure, and the lower half part of the cabinet body is of a cylinder structure; the front side of the upper half part of the cabinet body is provided with a front door, and the front door is provided with anti-electromagnetic radiation glass. Metal guide rails are arranged on the side walls of the two sides in the cabinet body, and patch boards and wiring terminals are arranged on the metal guide rails. The top of the cabinet body is provided with wire inlet and outlet holes. The outer wall of the lower half part of the cabinet body is provided with a spiral wire duct, and the top end of the spiral wire duct is communicated with the interior of the cabinet body. According to the device provided by the utility model, the defect that the conventional testing device cannot be visible and monitored in real time when the shielding function is met is overcome; the collecting and stretching requirements of the test cable are met, the wave-shaped stress of cable storage and stretching is reduced, and abrasion caused by friction between cable winding is avoided.

The utility model provides a reference electrode and a three-electrode battery. The reference electrode comprises a base, a cover plate and a reference electrode column, the cover plate is detachably connected with the base, and a first via hole and a second via hole are formed in the base and the cover plate respectively; the reference electrode column is provided with a fixed part clamped between the base and the cover plate and an outward extending part which penetrates through the second via hole from one side of the cover plate and extends to the other side of the cover plate, the fixed part is used for being electrically connected with a lead in the battery cell penetrating through the first via hole, and the outward extending part is used for being connected with an external detection circuit. According to the reference electrode disclosed by the utility model, not only can the reliability of connection between the lead in the battery cell and the reference electrode column be ensured, but also the influence of abrasion of the lead in the battery cell on the test precision can be avoided, and meanwhile, the reference electrode column can be detached, so that the cyclic utilization of the reference electrode column is facilitated, and the research and development cost is reduced.

The utility model discloses a reflection pool overflow water leveling device applied to a non-contact water level gauge verification system. The reflection pool overflow water leveling device comprises an overflow reflection pool, a water supply device, a water supply pipeline and a water return pipeline, the overflow reflection pool is divided into an inner ring part and an outer ring part, the inner ring part serves as a reflection pool, and the outer ring part serves as an overflow groove; one end of the water supply pipeline is communicated with the inner ring part, and the other end of the water supply pipeline is communicated with a water supply device; and the outer ring part is communicated with one end of the water return pipeline. According to the non-contact type water level gauge, water overflows into the overflow groove after the reflection pool is full of water, so that the reflection pool is always kept at a fixed water level (namely the full water state) and is not influenced by any equipment aging and external factors, and the detection precision of the non-contact type water level gauge is prevented from being influenced.

The invention belongs to the technical field of compressor diaphragm testing, and particularly relates to a compressor diaphragm fatigue performance testing device and method. The compressor diaphragm fatigue performance testing device comprises a first tool piece and a second tool piece which are matched with each other, a first tool face of the first tool piece is provided with a first testing cavity, and a second tool face of the second tool piece is provided with a second testing cavity; the first test diaphragm is arranged on the first tool surface and seals the first test cavity; the second test diaphragm is arranged on the second tool surface and seals the second test cavity; the sensor is arranged between the first tool piece and the second tool piece and is used for detecting leakage of the test diaphragm; testing gas is arranged in the first testing cavity, and circulating pressure is injected into the second testing cavity, so that the first testing diaphragm and the second testing diaphragm do reciprocating motion.

The invention discloses a universal needle bed testing machine capable of adapting to PCBAs of multiple models, and relates to the technical field of PCBA testing, the universal needle bed testing machine comprises a machine and a testing upper computer installed on the upper side of the machine, a plurality of sliding grooves are formed in the upper end of the machine, clamping assemblies are installed in the sliding grooves in a sliding mode, and each clamping assembly comprises a support installed in the corresponding sliding groove in a sliding mode. A movable frame is arranged in the middle of the support in a penetrating mode, an inclined face is arranged at the end, close to the center of the machine table, of the movable frame, a guide groove is formed in the side, close to the center of the machine table, of the support, and a pressing assembly is installed in the guide groove and comprises a pressing block slidably installed in the guide groove. Through the clamping assembly capable of sliding along the sliding groove and the adjustable moving frame structure, special clamps do not need to be replaced for PCBA plates of different sizes and models, clamping and fixing of the plates of different specifications can be achieved only by adjusting the position of the support, the universality of the equipment is greatly improved, the application range of the equipment is greatly widened, and the practicability is high. And the equipment investment cost of multi-model product detection is reduced.

The utility model relates to the technical field of steel bar testing, and discloses a prestressed tendon reverse bending fatigue testing device which comprises a base, a movable frame is movably installed on the top side of the base, a connecting rod is arranged on the right side of the movable frame, and a placing table is fixedly installed on the top side of the movable frame. A limiting seat is movably installed on the top side of the containing table, a guide frame is movably installed on the top side of the base, and a blocking seat is fixedly installed on the top side of the guide frame. In the bending fatigue testing process, the two ends of the reinforcing steel bar can tilt by an amplitude, the two ends of the reinforcing steel bar are clamped with the chutes in the bottom sides of the limiting seats at the moment, so that limiting is carried out, and the limiting seats are pushed to move when the two ends of the reinforcing steel bar continuously tilt in the testing process; in the process, the reinforcing steel bars are limited through counter-acting force generated by the fastening springs, meanwhile, the placing table movable frame is pulled to move, the testing stability is improved, the reinforcing steel bars are prevented from being popped out, and then the testing safety is improved.

This invention discloses a testing device for a terrestrial laser communication terminal, relating to the field of communication terminal testing technology. It includes a housing assembly, a terminal mounting assembly located in the center of the housing assembly's inner cavity, a circulating salt spray assembly located at the bottom of the housing assembly's inner cavity, an accelerated dissolution assembly located inside the circulating salt spray assembly, and a quantitative feeding assembly connected to the accelerated dissolution assembly located at the rear of the housing assembly. The accelerated dissolution assembly includes a flow guide fixedly connected to the bottom of a storage hopper, the front end of which extends into a salt solution recovery tank and is fixedly connected to a piston cylinder. A barrier net is fixedly installed at the bottom of the piston cylinder. This invention can avoid the impact of excessive salt solution concentration differences on testing accuracy, and can also restore the used salt solution, reducing the amount of salt solution used during testing, thus reducing wastewater production and lowering testing costs and difficulty.