99 results about "Proof test" patented technology

The invention discloses a rapid calibration method and system for automatic testing equipment of a vehicle machine, and relates to the technical field of automatic calibration, and the method comprises the steps: inputting a preset standard calibration signal to the testing equipment, and collecting the response data of each testing channel of the equipment as calibration reference data; comparing the calibration reference data with a built-in standard reference value of the equipment, and calculating deviation data of each test channel; based on the deviation data, calibration parameters of each channel are calculated, and the calibration parameters comprise a gain compensation coefficient, a frequency compensation coefficient and a phase compensation coefficient; the calibration parameters are loaded to the corresponding channels of the test equipment, a preset standard calibration signal is input for verification test, and when errors of the channels are smaller than a preset residual error threshold value, calibration is completed, and the calibration parameters are stored. By establishing the gain-frequency-phase joint compensation model and combining the parallelization verification and increment optimization algorithm, the high-precision rapid calibration of the automatic test equipment of the vehicle machine is realized.

The invention provides a weather-proof test system for an abnormal sound vibration test. The weather-proof test system comprises an environment box and abnormal sound test equipment, the environment box comprises a base table and a box body, a temperature adjusting chamber is formed in the box body, the base table is provided with a carrying base face located on the lower side of the temperature adjusting chamber, the base table is provided with a heat insulation chamber sunken relative to the carrying base face, and the heat insulation chamber is separated from the temperature adjusting chamber through a heat insulation plate; the abnormal sound testing equipment comprises a driving mechanism, a transmission mechanism and a bearing mechanism, the driving mechanism comprises a vibration exciter, the vibration exciter is arranged in the isolation chamber, and the transmission mechanism and the bearing mechanism are arranged above the carrying base plane. Different parts of the abnormal sound testing equipment are separated by arranging the temperature adjusting chamber and the heat insulation chamber, the transmission mechanism and the bearing mechanism of the mechanical part are arranged in the temperature adjusting chamber, and the driving mechanism of the electrical part is arranged in the heat insulation chamber, so that the requirement of a weather-proof test can be met, and the working stability of the vibration exciter can be ensured.

The invention relates to the technical field of capacitors, in particular to an explosion-proof test method for a power capacitor. Injecting a multi-band harmonic current sequence into the composite stress field, capturing three-dimensional strain propagation characteristics of the capacitor shell in real time, and establishing a strain-discharge space-time correlation model according to the three-dimensional strain propagation characteristics; a capacitor shell structure integrity attenuation curve is obtained according to the strain-discharge time-space correlation model, and when the slope of the attenuation curve breaks through a preset critical topological form, a multi-stage linkage protection device is triggered to implement energy discharge; and extracting a plasma spectrum fingerprint formed by the self-healing characteristic of the metallized film in the energy discharge process, and reversely reconstructing an explosion-proof performance grade evaluation system of the capacitor through the offset of a characteristic spectral line. The full-process closed-loop test of the capacitor from stress loading, failure early warning to performance evaluation is realized, and the environment simulation authenticity, the failure early warning accuracy and the performance evaluation scientificity of the explosion-proof test are improved.

The invention discloses a new energy battery high-temperature explosion-proof test device and a use method thereof, and belongs to the technical field of battery production. A controller is arranged on the outer side of the test box; a plurality of exhaust holes are formed in the upper surface of the test box; a gas buffering and discharging mechanism is arranged at the top of the test box; a pressure monitoring module and a heating module are arranged on the inner wall of the test box; the open end is blocked by a sealing door; and the gas buffering and discharging mechanism is arranged on the outer sides of the plurality of vent holes. The method comprises: placing and positioning a battery; closing the sealing door; the controller starts a heating module to heat the new energy battery; the pressure monitoring module is used for monitoring the interior of the test box; when the battery is spontaneously ignited or exploded, the air pressure in the test box is increased, the air pressure pushes the sealing plug to slide upwards from the exhaust hole, the sealing plate is higher than the exhaust groove, and gas in the test box is exhausted from the exhaust groove. The gas buffering and discharging mechanism ensures that air pressure in the test box is slowly discharged, casualties possibly caused by instant release of high-pressure gas are avoided, and the safety of the test process is improved.

The invention relates to the technical field of new energy battery testing, and discloses explosion-proof testing equipment for a new energy battery metal shell, which comprises an equipment main body, a detection cavity is arranged in the equipment main body, a detection table is arranged in the detection cavity, and an air outlet and an ejection mechanism for explosion-proof testing are arranged on the surface of the detection table. A moving groove is formed in the bottom surface of the detection cavity, a supporting plate is installed on the bottom surface of the detection cavity, the detection table is fixedly connected with the surface of the supporting plate, two symmetrically-arranged transverse plates and two symmetrically-arranged side plates are slidably connected to the surface of the supporting plate, the transverse plates and the side plates form a rectangular structure, and the detection table is located in the center of the rectangular structure. According to the explosion-proof test equipment for the new energy battery metal shell, abrasion to the inner sides of the transverse plate and the side plates when the metal shell which expands due to detection is taken out is avoided, and the service life of a fixed mold formed by the transverse plate and the side plates is prolonged.

The invention relates to the field of power battery testing, in particular to a power battery simulation experiment explosion-proof test box which comprises an explosion-proof box, an explosion-proof guide plate and the like. According to the explosion-proof test box for the simulation experiment of the power battery, the explosion-proof guide plate and the explosion-proof baffle plate jointly provide explosion-proof impact protection for the short-circuit simulation tester located above the explosion-proof box and the conductive clamp located in the explosion-proof box; when the power battery explodes, the electric conduction clamp is pulled out of the power battery and folded upwards through the folding and unfolding assembly in time, the short-circuit simulation experiment tester can be prevented from being damaged by high-voltage current impact, and when the power battery explodes, explosion impact can be guided to pressure relief cylinders on the two sides in time through the pressure relief groove structures on the anti-explosion flow guide plate and the anti-explosion supporting table. The technical problem that when the power battery explodes, the connecting circuit of the short-circuit simulation experiment tester and the tester are seriously damaged easily is solved.

The utility model discloses an explosion-proof test box, relates to the field of explosion-proof test devices, and aims to solve the problems that an existing explosion-proof test box used for air tightness test in the prior art is complex in structure, and operation is inconvenient during air tightness test due to the complex structure. A square tube frame is arranged in the explosion-proof test box, first sealing plates are connected to the upper end face and the lower end face of the square tube frame, second sealing plates are connected to the end faces of the two sides of the square tube frame, a rear cover plate is connected to the rear end of the square tube frame, a front cover plate is connected to the front end of the square tube frame, and a rectangular opening is formed in the middle of the front cover plate. A plurality of connecting holes are formed in the edge of the rectangular opening of the front cover plate, a rectangular cover plate is connected to the front end of the rectangular opening, a rectangular sealing ring is fixedly connected to the edge of the rear end face of the rectangular cover plate, and a plurality of connecting grooves are formed in the edge of the rectangular cover plate.

The invention discloses a modularized explosion-proof material testing tool, and belongs to the technical field of automobiles, the modularized explosion-proof material testing tool comprises at least one basic module, a plurality of basic modules are connected, and a single part material explosion-proof test is carried out or the explosion-proof performance of a plurality of part materials is simultaneously detected in one test; wherein the basic module comprises a fixed frame, a detachable supporting column and an anti-impact structure bolt; the multiple fixing frames are in threaded connection through the detachable supporting columns and the anti-impact structure bolts. The tool for the test can meet the requirement that explosion-proof tests can be carried out on vehicle types of various qualities by using the same tool and bolts, multi-part material tests can be completed through one-time tests according to requirements, and the test cost and the test period are greatly reduced.

The utility model belongs to the field of explosion-proof test boxes, and particularly relates to a test box for explosion-proof tests, which comprises a support, a first rotating seat is fixedly connected to the top of the support, a rotating frame is rotatably connected to one side of the first rotating seat, and a test box body is fixedly connected to the top of the rotating frame. A pretreatment mechanism is arranged at the top of the test box body, and a protection mechanism is arranged on one side of the test box body; the test box body and the protection mechanism are rotatably connected to the top of the support through cooperation of the rotating frame and the first rotating seat, the rotating frame can drive the protection mechanism to turn over, so that the box door of the test box body is far away from people, and test articles in the test box body fall into the processing box; then water in the water tank is pumped by a water pump, and cooling water is sprayed into the treatment box through a liquid collecting pipe and a spraying pipe, so that the test articles in the treatment box are further cooled.

The application discloses a kind of multi-stage linkage explosion venting test methods combined with powdery combustion inhibitor, it is related to explosion-proof engineering and safety detection technical field;The method is by constructing with explosion venting device, ignition system, powdery inhibitor delivery system and pressure and optical sensor test cabin, uses PLC to realize ignition, pre-delivery, pressure relief trigger, synchronous inhibition and afterflame inhibition and so on multi-stage linkage control;And through pressure, temperature and flame sensor real-time acquisition of multi-dimensional data of explosion process;By before ignition, ignition instant and in the process of pressure relief with different doses of powdery inhibitor, the explosion suppression performance under different linkage strategies can be systematically evaluated;The application can simultaneously obtain peak pressure, pressure rise rate, flame propagation speed and re-burning conditions and other multi-parameters, realize the quantitative evaluation of the explosion suppression efficiency of powdery combustion inhibitor under multi-stage linkage explosion venting conditions, with the advantages of good data integrity, strong repeatability and suitable for standardization explosion-proof test method construction.

The present invention discloses an explosion-proof electrical product test box, comprising: a test box body, a sealed box door, a self-shrinking explosion-proof test mechanism, a pressure relief and flow guiding mechanism, and a dust removal and cooling mechanism. The self-shrinking explosion-proof test mechanism comprises an explosion-proof inner shell, an explosion-proof buffer air bag layer is fixedly connected between the explosion-proof inner shell and the inner wall of the test box body, a linkage air guide is fixedly assembled on the top of the test box body, a compression air cavity is opened in the linkage air guide, and a plurality of evenly distributed control air cavities are opened in the linkage air guide. The pressure relief and flow guiding mechanism comprises a pair of air collecting parts, and exhaust pipes are plugged into one end of the pair of air collecting parts located outside the test box body. The present invention can provide multi-faceted explosion-proof protection for the explosion-proof electrical product test box by arranging a self-shrinking explosion-proof test mechanism and a pressure relief and flow guiding mechanism, significantly improving the explosion-proof protection effect of the explosion-proof electrical product test box, and greatly improving the safety and reliability of the use of the explosion-proof electrical product test box.

The application discloses an explosion-proof test circuit based on an IGCT power module, wherein a first plate of a capacitor module is electrically connected with a first end of a first power test unit, a second plate of the capacitor module is electrically connected with a second end of a second power test unit, and the first power test unit and the second power test unit are connected in series. The first power test unit comprises a conductive pad and an insulating pad, or the second power test unit comprises a conductive pad and an insulating pad. In this way, a straight-through short-circuit fault between the first power test unit and the second power test unit is simulated through the insulating pad and the conductive pad, and the voltage information and the current information of the capacitor module when the straight-through circuit fault occurs are verified, so that the straight-through short-circuit fault test can be realized through the explosion-proof test module, a complete converter valve or valve section is not needed to be formed, the experimental condition is simple, and the test is convenient.

The utility model discloses a dustproof test tube rack and relates to the field of test tube racks. The dustproof test tube rack comprises a hollow base, one side of the hollow base is communicated with an air inlet pipe, and a circle of insertion groove is formed in the outer side of the upper surface of the hollow base; the transparent dust cover is inserted into the slot of the hollow base; compared with a conventional test tube rack in the prior art, the dustproof test tube has the advantages that the hollow base, the transparent protective cover, the hollow support column, the conical inclined surface, the water collecting box and the like are matched for use, so that the dustproof test tube can be used for dustproof storage of the test tube and can be used for quickly drying the test tube which needs to be reversely buckled for draining after being cleaned; meanwhile, water drops dripping on the test tube rack can be cleaned and collected, the situation that the water drops stay on the test tube rack for a long time to breed bacteria and pollute subsequent test tubes needing to be cleaned or stored is avoided, and the protection effect on the test tubes is effectively improved.

The invention discloses radio frequency explosion-proof test equipment and a radio frequency explosion-proof test method. The equipment comprises an explosion-proof test device and a test circuit. A closed explosion cavity of the explosion-proof testing device is configured to be filled with explosion gas, the discharge mechanism comprises a discharge electrode and a driving assembly, the discharge electrode is arranged in the closed explosion cavity and comprises a first electrode and a second electrode, the first electrode is configured to be connected with tested radio frequency equipment, and the second electrode is connected with the driving assembly; the test circuit comprises a processing sub-circuit, and the processing sub-circuit is configured to send a first control instruction to the driving assembly under the condition that the first electrode receives a first radio frequency signal output by the tested radio frequency equipment at the maximum power. The driving assembly is configured to respond to the first control instruction and drive the second electrode to move relative to the first electrode, so that the second electrode and the first electrode are periodically connected and disconnected. According to the invention, explosion-proof safety performance testing can be carried out on the tested radio frequency equipment which is actually applied, and actual operation requirements are better met.

The utility model discloses a split type explosion-proof test box for battery testing, which relates to the technical field of battery testing, and comprises a box body, a detection instrument and a pressure relief mechanism, and an opening is arranged on the side surface of the box body; an opening is formed in the box body, the bottom plate trolley enters and exits the box body through the opening, a bottom plate used for bearing a battery is arranged on the bottom plate trolley, a moving mechanism is arranged below the bottom plate, a protective cover is movably connected to the upper face of the bottom plate, and a pull rod is connected to the protective cover. The device is good in compatibility, can adapt to batteries of different sizes, meets the requirements of data recording and phenomenon observation in the testing process, keeps the state of residues after testing to be complete, keeps the testing detail to be complete, and is safe and reliable in subsequent disassembly, analysis and transfer.

The utility model relates to the technical field of test equipment, and particularly discloses automatic test equipment for a vehicle navigation controller, which comprises a base and a console, a test mechanism and a movable plate are arranged on the base, at least two test stations are arranged on the movable plate, the test mechanism is connected with the console, and the test mechanism comprises a circuit board and a probe group connected with the circuit board. The number of the probe sets is at least two, the two probe sets correspond to the positions of the two testing stations respectively, and the movable plate is movably installed on the machine base through the displacement assembly and can be driven by the displacement assembly to move towards the probe sets. The vehicle-mounted navigation controller interface stability test system is simple and convenient to operate, has high automation degree, can test the interface stability of the vehicle-mounted navigation controller, solves the problem that data test needs to be verified and tested through real vehicle travel, has strong universality and wide application range, greatly reduces the cost of manpower and material resources, and meets the use requirements.

The invention discloses a strain optical cable installation process calibration and test method, and relates to the technical field of strain optical cable test. The device comprises a testing system, the testing system is composed of a linearly distributed steel bar tensioning module, a plurality of pouring modules, a fixed-point steel bar clamp and optical cable data acquisition equipment, optical cable penetrating openings and steel bar penetrating openings are formed in the two sides of the pouring modules, the steel bar tensioning module comprises a transverse jack, and a movable-point steel bar clamp is fixed to the telescopic end of the transverse jack. According to the invention, a novel test method is designed; the device can verify and test the influence of different laying processes and embedding installation processes on the optical cable test accuracy, the influence of concrete layers made of different materials on the optical cable, the difference and respective influence of the same optical cable in embedding installation and surface installation, and the influence of the shrinkage strain of concrete on the optical cable, and the integration effect is good. The testing efficiency and precision are improved, quality detection of the optical cable is facilitated, and development and design of a novel optical cable are assisted.

The utility model relates to the technical field of toughened glass, in particular to a toughened glass explosion-proof testing mechanism which comprises a bottom plate capable of placing glass to be tested, a blocking and protecting mechanism capable of blocking glass fragments, a detection mechanism capable of detecting the glass and a plurality of positioning mechanisms. According to the utility model, the glass to be tested is placed on the bottom plate, then the ball body with a proper specification is selected, the U-shaped rod adjacent to the ball body is supported by the supporting rod, then a user manually moves the glass to adjust the impacted position of the glass according to the falling point indicated by the laser of the laser pen, so that the part, needing to be impacted, of the glass is located at the laser red point, and the supporting rod slides to pull out the glass. The ball naturally falls to impact the glass, the falling point of the ball is fixed, a user can manually adjust the position between the U-shaped rod and the adjacent rotating rod and then fix the U-shaped rod and the adjacent rotating rod through a bolt, the height of the ball is adjusted, and the falling point of the ball is adjusted; the error of impact force generated by falling of the steel ball every time is reduced, and the baffle and the cover plate can be used for protecting personnel.

Methods of characterizing bondline integrity of structural assemblies, methods of establishing reduced proof pressure differentials for proof testing a structural assembly that includes a bondline, methods of proof testing a structural assembly, and acoustic evaluation systems are disclosed herein.

The utility model discloses a wiring harness color error-proofing testing device, which comprises a seat body, a wiring harness detection groove, a wiring harness imbedding channel and a color sensor, the wire harness detection groove and the wire harness imbedding channel penetrate through the base body in the left-right direction, the wire harness imbedding channel is located in front of the wire harness detection groove, the rear end of the wire harness imbedding channel is communicated with the wire harness detection groove, and the front end of the wire harness imbedding channel extends forwards and penetrates through the front end face of the base body; a color sensor installation groove is formed in the position, over the wire harness detection groove, of the base body, the bottom end of the color sensor installation groove is communicated with the wire harness detection groove, the color sensor is fixedly arranged in the color sensor installation groove, and the color collection end face of the color sensor is arranged facing the wire harness detection groove. The wire harness color error-proofing test device can realize rapid detection of wire color codes of the wire harness, and is especially suitable for assembly process detection before wire harness power-on test.

The utility model belongs to the technical field of explosion-proof tests, and particularly relates to an explosion-proof test device for small-sized explosion-proof equipment, which comprises an explosion-proof tank, the outer wall of the explosion-proof tank is provided with a purging air inlet, an air distribution inlet, an air outlet I and an air outlet II, and the outer wall of the explosion-proof tank is fixedly connected with a push rod. An auxiliary test assembly is arranged in the explosion-proof tank, a pressure detector is fixedly mounted in the inner wall of the explosion-proof tank, and the auxiliary test assembly comprises a protective seat. According to the explosion-proof test device for the small-sized explosion-proof equipment, the reciprocating screw rod is driven to rotate by rotating the handle, and then the moving block is driven to move along the screw rod, so that the position of the spray head fixedly connected with the moving block can be flexibly adjusted, and the flexible adjustment capability can effectively reduce the blowing and gas distribution time and improve the test efficiency; more uniform gas distribution in the test process can be ensured, and the accuracy and the reliability of a test result can be improved.

The invention discloses a dust test device of a sealing element for an electric drive system, and relates to the technical field of electric drive system sealing, the dust test device comprises a base, the upper side of the base is fixedly connected with an oil chamber, the left side and the right side of the oil chamber are fixedly connected with supporting frames, and a cross beam is arranged between the two supporting frames; a sealing flange is arranged on the outer side of the supporting frame, a sealing piece body is arranged on the inner side of the sealing flange, a shaft to be tested is arranged on the inner side of the oil chamber, and one end of the shaft to be tested penetrates through the sealing piece body. According to the dust test device of the sealing element for the electric drive system, the oil chamber, the supporting frame, the sealing element main body, the shaft to be tested and the feeding pipe are arranged, so that sealing and dustproof tests can be carried out on the sealing element; meanwhile, by means of a feeding pipe, a funnel, a sliding block, a rear plate, an inclined plate I and an inclined plate II, the spiral conveying cylinder can swing and the funnel can be controlled to move up and down repeatedly during feeding, so that the entering dust is uniformly distributed, and the reduction of the dustproof test precision is avoided.

This application provides a sliding test device for performing sliding tests on a test object. The device comprises a support mechanism; a first fixing mechanism slidably connected to the support mechanism for fixing a first end of the test object; a winding shaft disposed on the support mechanism; during the sliding test, the middle portion of the test object is wound around the outer circumferential surface of the winding shaft; a second fixing mechanism for fixing a second end of the test object and capable of moving relative to the support mechanism; wherein the angle between the line connecting the first fixing mechanism and the winding shaft and the line connecting the second fixing mechanism and the winding shaft is greater than 0° and less than 180°; and a first driving member connected to the second fixing mechanism for driving the second fixing mechanism to move, thereby causing the test object to slide back and forth relative to the winding shaft during the sliding test. This test device can verify the reliability of the test object by repeatedly bending or sliding it.

The invention discloses a special environment weather resistance test device and test method for monitoring a current sensor on line, and belongs to the technical field of current sensor tests.The device comprises a test box, a test tool and an excitation output source, the test tool is arranged on the upper portion in the test box, and an ultraviolet lamp array is arranged on the lower portion in the test box; the excitation output source is arranged on the top surface of the test box, and the excitation output source is connected with the two ends of the test tool. A special excitation circuit is additionally arranged outside the test box, and a sensor test tool is designed in the test box, so that various performance tests of sensitivity, dynamic range, linearity error and the like of current sensors of various models can be carried out under the extreme environment condition that the current sensors are always in the environment weather-proof test box.

The utility model belongs to the technical field of valve testing, and particularly relates to an explosion-proof testing system of a low-temperature valve, which comprises a testing room, a mounting pit is arranged on the ground of the testing room, a low-temperature tank, a ventilation system and a leakage rate detection system are arranged in the mounting pit, the low-temperature tank is connected with a liquid nitrogen filling system, and the ventilation system is connected with a liquid nitrogen outlet. A temperature detection system is arranged in the low-temperature tank, and a valve to be detected is placed in the low-temperature tank and communicated with the high-pressure gas conveying system. According to the utility model, through the low-temperature tank, the liquid nitrogen filling system, the temperature detection system and the high-pressure gas conveying system, remote testing of the low-temperature valve is realized, the testing efficiency of the low-temperature valve is greatly improved, the safety of testing personnel is ensured, and the environment of a testing site is detected and ventilated through the ventilation system and the leakage rate detection system; and the safety of testers in the valve dismounting and mounting process is ensured.

The invention relates to the technical field of automobile motor testing, and discloses new energy automobile high-speed driving motor online comprehensive testing equipment which comprises a workbench, a testing motor is arranged at the position, close to the left side, of the top of the workbench, a resistance box is fixed to the right side of the top of the workbench in a penetrating mode, and the output end of the testing motor is detachably connected with a rotating rod. One end of the rotating rod penetrates through the resistance box and is fixedly provided with evenly-distributed blades, and the blades are located in the resistance box. By changing the air pressure in the resistance box, the load conditions under different working conditions can be simulated, so that the performance of the motor under various load conditions can be evaluated and tested, the output capacity and efficiency of the motor and the stability during load bearing can be known, and by simulating the load conditions in actual use, the performance of the motor can be evaluated and tested. Whether the design of the test motor meets the requirements can be verified, and the reliability and durability of the motor under different working conditions can be tested by applying different loads.

The utility model discloses an extruding machine with a positioning function, which comprises a bearing frame and an anti-explosion machine shell, and further comprises a transverse double-shaft air cylinder and a vertical double-shaft air cylinder, and the transverse double-shaft air cylinder and the vertical double-shaft air cylinder are respectively fixed at one end and the bottom of the inside of the anti-explosion machine shell welded at the top of the bearing frame. According to the utility model, the vertical positioning seat and the like are arranged, so that when the device is used, the transverse double-shaft cylinder is started, and the extrusion test disc correspondingly arranged at the output end of the transverse double-shaft cylinder can move towards the transverse positioning seat, so that the extrusion explosion-proof test can be carried out on the two side surfaces of the periphery of the lithium battery to be tested; the vertical double-shaft air cylinder is started, the extrusion test disc correspondingly installed at the output end of the vertical double-shaft air cylinder can move towards the vertical positioning base, and therefore extrusion explosion-proof testing can be conducted on the upper face and the lower face of the lithium battery to be tested, and the device achieves multi-position testing, is high in functionality and convenient to popularize.

This application provides an automated flexible changeover control method for projection welding based on parameters of multiple parts, including: S1, selecting the parameter group corresponding to the current workpiece model on the human-machine interface of the central control system; S2, automatically loading welding parameter thresholds and control rules according to the selected parameter group, and sending them to the projection welding machine and robot controller via bus protocol; S3, starting the 3D vision system to collect the workpiece's pose information, calculating the path offset using the offset calculation formula based on the collected pose information, and correcting the robot's grasping path and projection welding station sequence in real time; S4, executing the projection welding production process and monitoring for anomalies in real time; S5, if an anomaly is detected in step S4, a partial pause signal is output, pausing only the abnormal station while keeping other stations open but not performing any actions; after manual confirmation and reset, a production cycle verification test is performed, and if the test is normal, normal production continues. This application can shorten changeover time and improve production continuity.

The embodiment of the invention discloses a high-reliability differential pressure air tightness test system, method and device, and the system comprises a control unit, a test pressure sensor, a balance valve, an exhaust valve, a first isolation valve, a second isolation valve, a differential pressure sensor, a tested object and a reference object. After inflation is completed, a balance stage is started, then an isolation valve, a balance valve and an exhaust valve are controlled to be closed, a test stage is started, pressure data of a tested object end and pressure data of a reference object end collected by a differential pressure sensor are obtained, and whether the tested object leaks or not is judged by comparing the pressure data of the tested object end and the pressure data of the reference object end; after the test is completed, exhaust is not directly carried out, a balance state is returned firstly, and a test pressure signal is collected and fed back to verify whether a test result is effective or not, so that the reliability of the test is greatly improved through double guarantee, and the problems existing in an existing differential pressure airtight test are solved on the premise that the cost is not increased.

The invention relates to the technical field of down jacket fabric testing, and provides a down jacket fabric down-proof testing device and method.The down jacket fabric down-proof testing device comprises a shell and a plurality of detection units arranged on the shell in the circumferential direction, each detection unit comprises a down feather cavity and an air inflation cavity, and a testing opening is formed in the side, facing the exterior of the shell, of each down feather cavity; a positioning assembly is arranged in the testing opening, a matched net-shaped plate is arranged in the down feather cavity, a sealing piston is arranged in the air inflation cavity, and the testing device further comprises a driving assembly used for driving the sealing piston and the net-shaped plate to move in a reciprocating mode in the direction of the testing opening. The multiple detection units can synchronously test multiple down jacket fabric samples, so that the multiple down jacket fabric samples can be rapidly tested, force is applied to the inner side of the tested down jacket fabric to promote down to impact the fabric, no object is in contact with the outer side of the fabric, and the down is prevented from getting out of the fabric. And accurate and real feedback of the down drilling performance of the down jacket fabric is ensured.