172 results about "Environmental tests" patented technology

The invention relates to a self-adaptive control method, system and device for environment test equipment, and the method comprises the following steps: S1, data collection: collecting environment detection data and data of a corresponding actuator according to a to-be-controlled physical quantity; s2, selecting or constructing a control object according to the physical quantity to be controlled; s3, performing online identification operation when an identification condition is met, otherwise, directly executing the step S4; s4, feedforward and feedback: calculating feedforward compensation and feedback compensation according to the value of the to-be-estimated quantity, and superposing the feedforward compensation and the feedback compensation to obtain a control instruction; and S5, performing constraint allocation on the actuator: performing saturation constraint processing on the control instruction to obtain a control quantity of the corresponding actuator. Joint online identification can be carried out on the to-be-estimated quantity only through perturbation excitation; different loads and test object states are automatically adapted; saturation constraint processing is adopted; the model and the algorithm are low in calculation amount, and precision, speed and engineering realizability are considered.

The invention relates to the technical field of electrical detection, in particular to a multi-stress coupling environment reliability testing method for an electricity consumption information acquisition terminal. Comprising the steps of applying a combined stress field to an electricity utilization information acquisition terminal through an environment test box; acquiring power utilization information acquisition terminal parameters; the method comprises the following steps of: capturing metering pulse response and carrier communication interaction signals of an electricity utilization information acquisition terminal under the excitation of a combined stress field by utilizing an electrical sensor, extracting carrier signal-to-noise ratio data and metering reference drift data, and generating a reference voltage compensation coefficient and an impedance matching threshold value; projecting the carrier signal-to-noise ratio data to an impedance matching threshold value, and constructing a stress failure envelope surface according to a hardware overload protection threshold value; and mapping the communication quality distortion residual vector to a stress failure envelope surface, and calculating a reliability life prediction value. According to the method, a uniform excitation environment is constructed, and performance degradation of different dimensions is uniformly quantified into accumulative stress damage integral, so that the comprehensive anti-interference capability of the terminal in a multi-stress coupling environment can be truly reflected.

The invention relates to the technical field of electromagnetic shielding cabinet testing, in particular to a dynamic performance testing device and method for an electromagnetic shielding cabinet, and the device comprises an environment testing cabin which is used for placing a to-be-tested cabinet and providing a controlled electromagnetic background environment; the dynamic load simulation system is mechanically connected with the to-be-tested cabinet and is used for applying physical excitation with preset strength to the to-be-tested cabinet so as to simulate structural deformation of the to-be-tested cabinet in a working state; and the signal transmitting system comprises a transmitting antenna arranged outside the to-be-tested cabinet and is used for generating an electromagnetic signal covering a preset frequency band. The dynamic load simulation system simulates vibration, cabinet door opening and closing and other actual dynamic working conditions, the temperature and humidity adjusting module is combined to simulate different climatic environments, meanwhile, the high-speed synchronous triggering module is used for achieving high-precision synchronization of dynamic load applying, electromagnetic signal transmitting and data collecting, multi-working-condition collaborative simulation and precise synchronous testing are achieved, and the testing efficiency is improved. And the authenticity and the reference value of a test result are greatly improved.

The present application provides a humidifying device and an environmental test device. The humidifying device includes a first humidifying heater for heating water in a humidifying container, a second humidifying heater having an output capacity larger than that of the first humidifying heater, and a humidifying control unit. The humidifying control unit causes the first humidifying heater to continuously operate when a required output is in a range belonging to a first region and in a range belonging to a second region having a higher required output than the first region, and controls the first humidifying heater according to the size of the required output when the required output is in the range belonging to the first region by stopping the second humidifying heater, and controls the second humidifying heater according to the size of the required output when the required output is in the range belonging to the second region in a state where the first humidifying heater is operated. Accordingly, confusion in humidity control between the regions having different sizes of the required output of the heater can be suppressed.

The invention relates to the technical field of test equipment design and manufacturing, in particular to an underwater vehicle head section product environment test clamp. The underwater vehicle head section product environment test clamp comprises a base and a mounting frame, the base comprises a bottom plate, side plates and reinforcing ribs, the bottom plate is fixedly connected with the side plates, and the reinforcing ribs are fixedly connected between the bottom plate and the side plates; the bottom plate is provided with a mounting hole used for being connected with a vibration test bed, an impact test bed or a constant acceleration test bed; the mounting frame comprises a base plate, a connecting plate and a rubber gasket, the base plate is provided with a mounting structure for mounting a product, the rubber gasket is arranged on the mounting surface of the base plate, and the connecting plate is fixedly connected with the base plate; wherein the mounting frame is detachably and fixedly connected with the side plates of the base through the connecting plates.

The utility model discloses an environmental test chamber separating device with temperature zoning, and belongs to the technical field of large-scale environmental test chambers. According to the environment test chamber separating device for temperature zoning, a test chamber comprises a first chamber body and a second chamber body, a separating wall is arranged between the first chamber body and the second chamber body, an underground space is arranged on the inner side of the first chamber body, a dynamometer is arranged on the underground space, a mounting base is arranged on the separating wall, and a temperature sensor is arranged on the mounting base. A first sliding door and a second sliding door are arranged on the inner side of the mounting seat; the first air bag strips are arranged on the sides, close to the partition wall, of the first sliding door and the second sliding door, inflation is conducted through the air pump in the underground space, the sealing performance of the partition device is effectively enhanced, the second air bag strip and the connecting piece are arranged at the end, close to the second sliding door, of the first sliding door, and it is further ensured that when the two doors are closed, the partition wall is closed. Due to the sealing effect between the two parts, heat exchange between different temperature areas is avoided, and the accuracy of an experimental result is improved.

The invention relates to the technical field of environment test, and discloses a comprehensive environment simulation test device and method, the device comprises a vacuum tank, a vacuum unit, a first temperature adjusting mechanism, a second temperature adjusting mechanism and a control system, and an opening at one end of the vacuum tank is provided with a sealing door capable of being opened and closed; the vacuum unit is used for adjusting the vacuum degree in the vacuum tank; the first temperature adjusting mechanism is used for adjusting the internal temperature of the vacuum tank; the second temperature adjusting mechanism is used for lowering the internal temperature of the vacuum tank; a micro-low gravity environment simulation module is arranged in the vacuum tank, and the micro-low gravity environment simulation module is used for driving the test sample to rotate in the first direction while rotating in the axial direction, so that the test sample can be simulated to be tested in a comprehensive environment with high / low temperature alternation, different vacuum degrees and different micro-low gravity factors in a single device; and the cost is saved and the occupied space is small.

This invention provides a detachable wind deflector structure and usage method for an aging test chamber, belonging to the technical field of environmental testing equipment. It includes a wind deflector, an active condensate collection module, a wind force verification module, a first base plate, and a first rotating rod. The active condensate collection module is located on one side of the wind deflector, and the wind force verification module is located on one side of the active condensate collection module. The first base plate is fixedly connected to the other side of the wind deflector, and the first rotating rod is fixedly connected to the front of the first base plate. This invention, through the active condensate collection module, can actively collect condensate, so that the wind blowing towards the test sample will not carry away condensate when passing through the wind deflector. This reduces the probability of condensate being blown onto the test sample, thereby reducing the possibility of damage caused by condensate.

The invention relates to a multi-parameter tester calibration system and method in a complex environment, and the system comprises a composite environment simulation device which is used for simulating extreme temperature, humidity, air pressure and vibration environment; a tester electrical parameter calibration device which is integrated with or arranged in parallel with the composite environment simulation device and is used for calibrating the tester in the simulation environment; a multi-parameter calibration device which is integrated with or arranged in parallel with the composite environment simulation device and is used for calibrating the plurality of sensors in the simulation environment; wherein the composite environment simulation device, the tester electrical parameter calibration device and the multi-parameter calibration device work cooperatively so as to construct a multi-parameter calibration database in a complex environment; and the measurement result of the tester is corrected in real time by using the multi-parameter calibration database. According to the invention, the problems that a multi-parameter tester is poor in environmental adaptability and lacks in calibration capability and self-adaptive correction capability in a complex environment are solved.

The present application belongs to the field of environmental test technology, and discloses a grid disc supporting assembly and an environmental test box. The grid disc supporting assembly comprises a support and a slide rail. Two supports are arranged on two opposite inner walls of the environmental test box. A plurality of variable-diameter mounting holes are arranged on the support in the vertical direction. The variable-diameter mounting hole comprises a first hole and a second hole which are communicated. At least two slide rails are connected to the two supports respectively. A variable-diameter mounting head is arranged on the slide rail. The variable-diameter mounting head comprises a mounting cap and a mounting neck. The variable-diameter mounting head is selectively mounted with the variable-diameter mounting hole to adjust the mounting height of the slide rail. The mounting and dismounting are convenient and fast. The two ends of the grid disc are supported on the top end faces of the two slide rails. In the present application, the grid disc is supported by surface contact with the slide rail, which facilitates the improvement of the support stability of the grid disc. The grid disc does not need to be processed with a clamping groove or a clamping convex, which ensures the strength of the grid disc and avoids deformation. The height position of the grid disc is realized by switching the slide rail on the support, which greatly improves the test safety and efficiency.

The utility model discloses a multifunctional power measuring environment test chamber, which comprises a first test chamber, a second test chamber, a partition door, a vehicle access gate, an underground space, a power measuring platform, a dynamometer assembly, an illumination assembly and a large fan, a pump room is further arranged outside the first test cabin and the second test cabin, industrial refrigeration equipment and industrial heating equipment are arranged in the pump room, and pipeline systems connected with the industrial refrigeration equipment and the industrial heating equipment are arranged on the first test cabin and the second test cabin respectively. Through the arrangement of the high and low temperature system, the illumination, the fan and the dynamometer assembly, the multifunctional dynamometer environment test chamber not only has the test capabilities of high temperature, low temperature, damp heat and temperature shock, but also has the dynamometer test function under the environments of wind test simulation, solar thermal effect and the like.

The present application relates to the technical field of plate performance testing, and particularly relates to a kind of plate edge durability test method;It comprises the following steps: cutting plate sample into standard size test piece;Using thermal mechanical analyzer respectively test the linear expansion coefficient of test piece edge material and base material;The test piece after processing is placed in environmental test chamber and is subjected to cyclic test;Test piece is fixed on load testing device, and constant load is applied along the direction perpendicular to the edge interface of plate plane;Using flatness tester to measure the overall warping of test piece, compare with the warping data before testing, calculate the warping change, evaluate the actual effect of plate balanced laminating process on preventing warping after edge sealing;Using weighted scoring method to calculate the comprehensive score of edge durability;Realize that the long-term durability of plate edge sealing under complex working conditions can be comprehensively and accurately evaluated, and provide scientific and comprehensive technical support for edge sealing process optimization, material selection and structure design.

The utility model relates to the technical field of rain test boxes, and discloses a strong-wind-resistant rain test box which comprises a box body, one side of the box body is communicated with an air inlet, one end of the air inlet is rotatably connected with two symmetrical first rotating shafts in an inserted mode, and the tops of the first rotating shafts are fixedly connected with second bevel gears. By arranging the regulation and control plate, the flow guide opening, the air guide plate and other structures, the air quantity entering the box body can be effectively regulated, meanwhile, under the external strong wind condition, the wind force is dispersed and guided through the flow guide opening and the air guide plate, the impact of wind pressure directly acting on the box body is remarkably reduced, and therefore the overall wind resistance and structural stability of equipment are improved. And the servo motor is adopted to drive the regulation and control plate to realize adjustable air port control, so that the air supply precision is improved, and environment tests under various different wind and rain conditions can be simulated conveniently.

The utility model discloses a sealed environment test box, include: test box body, the beneficial effect of the utility model is: through having set up heat preservation ventilation tank, electric heating wire and three -way pipe, has realized the wind that enters heat preservation ventilation tank through electric heating wire and heats, and the wind of heating enters ventilation tank through three -way pipe, through a plurality of air inlet net frame and enter test box body, heat treatment is carried out to the elastic clamp of the connection between oil inlet pipe and connecting oil outlet pipe, and the cold -air supply structure can be blown into the cold -air to test box body, and the cold -resistant sealing effect of elastic clamp is handled, through having set up bidirectional screw rod, sliding block and fixed slide, has realized the output end of motor and drives bidirectional screw rod rotation, and the sliding block of outside symmetry is driven to move when bidirectional screw rod rotates, and fixed slide is driven to move through the sliding block, and fixed slide drives sealed observation door to slide at the one side of test box body, and the opening and closing adjustment of sealed observation door is handled conveniently.

The utility model relates to the technical field of environmental test equipment, and particularly discloses a window sealing device of a high-low temperature damp-heat low-pressure test box, which comprises a window frame, and a multi-sealing component, an elastic component and a buffer layer are arranged on the inner wall of the window frame; the multi-sealing assembly is composed of an outer-layer sealing ring, an inner-layer sealing ring and a middle supporting ring, the elastic assembly comprises a plurality of annular spring sets which are arranged on the outer wall of the extension plate and are annularly distributed, and the outer-layer sealing ring resists high temperature, chemical corrosion and friction loss and bears external environment pressure; low-temperature elastic compensation and deformation self-adaption capacity are provided through the inner-layer sealing ring, stress is dispersed in the middle of the supporting ring, the situation that single-layer sealing loses efficacy due to local overload is avoided, and therefore multi-layer sealing protection is achieved. The pre-tightening force of the annular spring set is transmitted to the supporting ring through the inner-layer sealing ring, overall supporting of the sealing structure is formed, and the annular array design of the annular spring set ensures that the pressure of the sealing face is evenly distributed.

The present invention provides an environmental testing device, comprising: a heat-insulating chamber which includes a test chamber and is formed by an electrically conductive heat-insulating plate; an air conditioner; the heat insulation chamber comprises a chamber main body with an entrance and an exit and a door body for opening and closing the entrance and the exit, the heat insulation plate forming the chamber main body comprises an outer plate and an inner plate arranged on the inner side of the outer plate, and the air supply fan is used for generating air flow enabling the air conditioned by the air conditioner to flow into the test chamber. A heat insulation plate forming a chamber main body and a heat insulation plate forming a door body are connected in a mutually electrically conductive manner, and the heat insulation plate forming the chamber main body is provided with an opening through which at least one of a shaft of an air blower and a part of a component forming an air conditioner is inserted. And a shield box which is attached to the insulation plate having the opening so as to cover the opening from the outside of the insulation chamber, is electrically conductive to the insulation plate, is formed of an electrically conductive member, and defines a space by the shield box and the insulation plate having the opening.

This invention belongs to the field of aero-engine experimental technology, and discloses a method and system for maximum imbalance testing of a three-rotor engine. The method includes: determining the phase combination of imbalance amounts for each rotor in the maximum imbalance test based on the maximum imbalance amount of each rotor; determining the maximum imbalance test speed range, and determining the test installation conditions and test plan; conducting the maximum imbalance test of the three-rotor engine; and verifying the acceptability of the vibration of the three-rotor engine by analyzing the test data and comparing it with the overall vibration limit value of the three-rotor engine, the high-cycle fatigue reserve coefficient of the piping, and the random spectrum of the accessory environmental test. This invention improves existing methods for assessing high-cycle fatigue vibration of piping and assessing vibration of accessories for complex multi-support rotors, saving test resources, improving the reliability of vibration assessment, and solving the problem of inaccurate imbalance test results caused by the failure to consider the influence of component structure in existing technologies.

This invention relates to the field of environmental reliability testing equipment technology, specifically disclosing an automated control device for comprehensive environmental testing, including a base plate, a vibration table, and a temperature and humidity test chamber. A lifting frame is mounted on the top of the base plate, and the lifting frame is connected and fixed to the temperature and humidity test chamber via a vibration damping mechanism. A vibration base is mounted on the top of the base plate, and the vibration table is mounted on top of the vibration base. A groove is formed at the bottom of the temperature and humidity test chamber, and a mounting plate is installed inside the groove. Two movable plates are installed at the bottom of the mounting plate, each with a first cleaning mechanism at its bottom end and a second cleaning mechanism at both ends. In this invention, before use, the vibration table and the temperature and humidity test chamber are automatically cleaned by the first and second cleaning mechanisms, preventing dust and metal parts from entering between the table and the chamber, indirectly extending the service life of the entire device.

The utility model relates to a protocol conversion device for multi-type environmental test equipment data acquisition, which comprises a protocol conversion module and an equipment connection module, and is characterized in that the protocol conversion module comprises a first box body and a protocol converter arranged in the first box body, and the protocol converter is used for converting a protocol of environmental test equipment data into a wireless communication protocol; the first box body is provided with a data input interface and is connected with the corresponding protocol converter; the equipment connecting module comprises a second box body, a wire harness container arranged in the second box body and a signal warning indicator arranged on the surface of the second box body, a data transmission wire harness is wound on the wire harness container in a stretchable mode, at least one data output interface is arranged on the second box body, one end of the data transmission wire harness is connected with the corresponding data output interface, and the other end of the data transmission wire harness is connected with the signal warning indicator. The data output interfaces are connected with the corresponding data input interfaces in a pluggable mode, and the signal warning devices are electrically connected with the corresponding data transmission wire harnesses and can give out sound and / or light warning signals in a power-on state.

The utility model relates to the technical field of environment detection sample boxes, and discloses an environment detection sample box convenient for taking out samples, which comprises a sample box, sliding chutes are arranged on both sides in the sample box, sliding blocks are arranged in the two groups of sliding chutes in a sliding manner, and a support plate is fixedly arranged between the two groups of sliding blocks. Through the supporting rod, the sealing cover, the rotating cylinder, the placing plate, the test tubes and the supporting plate in the anti-toppling material taking mechanism, an operator slowly rotates the rotating cylinder on the supporting rod, the placing plate located between the sealing cover and the supporting plate can be rotated to the front side of the sample box, the operator can take the test tubes more conveniently, the serial number of each group of test tubes can be clearly seen, and the working efficiency is improved. On the contrary, when the operator inserts the test tubes needing to be stored into the placing grooves in the placing plate and rotates the placing plate to the position between the sealing cover and the supporting plate, the test tubes stored on the placing plate can be firmly positioned between the sealing cover and the supporting plate, and the situation that when the sample box shakes, the test tubes in the sample box topple over is avoided; and the safety and firmness of test tube storage are effectively ensured.

The invention relates to the technical field of welding equipment, and discloses a spot welding machine for connecting a box body frame of an environmental test box, which comprises an electric welding machine body, an upper electrode is movably mounted at the top of the electric welding machine body, a lower electrode is fixedly mounted at the bottom of the electric welding machine body, and the spot welding machine further comprises a conical rod fixedly mounted on the upper surface of the lower electrode; a fixing ring is fixedly installed on the outer side of the upper electrode, and a plurality of connecting rods are fixedly installed at the bottom end of the fixing ring. The hydraulic medium is extruded by the adjusting plate and the main piston, so that the correcting rods drive the correcting plates to slide towards the direction of the nut, the purpose of pressing and correcting the nut from multiple angles through the multiple correcting plates is achieved, it is ensured that the position of the nut is stable in the welding process, the probability of insufficient welding during spot welding due to nut deviation is reduced, and the welding quality is improved. Accurate butt joint of the nut and the connecting piece in the spot welding process is effectively guaranteed, the accuracy of welding spots is guaranteed, and the production efficiency and the consistency of products are improved.

The invention discloses a low-temperature humidity control method for an automobile environment test chamber, which relates to the technical field of automatic control of test chambers and comprises the following steps: acquiring dry-bulb temperature, relative humidity and atmospheric pressure in the chamber, front and back pressure difference of a coil pipe, air volume, surface temperature of the coil pipe and outlet temperature of the coil pipe, and calculating air mass flow and moisture content in the chamber; symmetrical temperature perturbation is applied with the current coil pipe surface temperature as the center, coil pipe air side channel impedance coefficients are calculated at different temperature points, and an impedance curvature index is calculated according to the coil pipe air side channel impedance coefficients; a continuous inhibition factor is generated based on the impedance curvature index, a basic dehumidification demand obtained by the moisture content deviation is continuously corrected, and a planned dehumidification mass flow rate is obtained; and the humidification mass flow rate, the coil pipe target temperature and the reheating power are further calculated and issued to a refrigerating loop, a humidifier and a reheater. The low-temperature humidity control stability of the test chamber can be improved.

The invention belongs to the technical field of dummy sensor diagnosis, and particularly relates to a dummy sensor abnormity intelligent diagnosis system, which establishes a dummy and sensor unique identity index through a data acquisition module, and acquires and associates environmental test data and sensor data; the preprocessing module completes data cleaning, impact section interception and feature vector generation and normalization; the anomaly detection module generates a corresponding result through multi-dimensional detection of a rule layer, a statistical layer and a model layer, and the intelligent comparison module outputs a related score and a result through comparison of individual historical data and group data; the exception scoring module is fused with the multi-source scores to calculate a unified exception score; the dynamic variable analysis module locates fault causes through multi-step analysis, and the fault code generation module is matched with a fault code system to output fault codes, cause instructions and processing suggestions. According to the invention, the problem that the existing dummy sensor anomaly diagnosis technology is lack of multi-dimensional data association analysis capability can be solved.

The utility model relates to a damp and heat generation system convenient to maintain, and belongs to the technical field of environment test equipment. The device comprises a steam generation mechanism, a steam-water separation mechanism and an atomization mechanism, wherein the steam generation mechanism generates water-containing steam, the steam-water separation mechanism separates the steam from water to ensure that the output steam is pure, and the atomization mechanism atomizes the treated steam into small particles and sprays the small particles out; all the mechanisms are in modularized butt joint through flange plates, later maintenance is facilitated, only problem parts need to be replaced during overhaul and replacement, cost is saved, and the problems that a traditional humidity and heat generating device is complex to maintain and the humidifying efficiency is reduced can be effectively solved.

The invention provides a clamp for a comprehensive environment test of a large spacecraft. The clamp comprises a circular plate, a supporting column and an annular guide rail. An annular sliding groove is formed in the circular plate, the annular guide rail is arranged in the annular sliding groove in a sliding mode, and an air floating cushion is arranged between the bottom of the annular guide rail and the groove bottom of the annular sliding groove. The multiple supporting columns are fixedly installed on the annular guide rail in the circumferential direction and used for sliding to multiple supporting positions under the guidance of the annular guide rail; the bottom of the supporting column is used for being detachably connected with the circular plate when sliding to the supporting position, and the top of the supporting column is used for being fixedly connected with a spacecraft. The structure that the supporting column is installed on the circular plate in a sliding mode is adopted, the supporting column can directly steer on the circular plate, the satellite steering time is greatly shortened by rotating the supporting column, meanwhile, the risk caused by hoisting in the environment test box is reduced, and the stability of the environment test box is improved. The problems of difficulty in satellite reversing, long time, collision caused by hoisting and the like in the comprehensive environment vibration test of the entity type large spacecraft are solved.

The utility model relates to the technical field of transponder and BTM antenna unit testing, in particular to an ice environment testing device suitable for a transponder and a BTM antenna unit. Comprising an outer box body, a graduated scale arranged on the inner wall of the outer box body, a bayonet socket arranged on the inner wall of the outer box body, an inserting groove formed in one side of the bayonet socket, an inner box body arranged in the outer box body, an inserting block arranged on the outer wall of the inner box body, and corresponding wire passing holes formed in the same side of the outer box body and the inner box body. The mounting plate is arranged at the upper end of the outer box body; the to-be-tested module is arranged at the lower end of the mounting plate and is positioned in the inner box body; the outer box body and the inner box body are both of a box type structure with an opening in the upper end, the upper end of the outer box body and the upper end of the inner box body are located on the same plane, and the upper end of the outer box body and the upper end of the inner box body are covered with the mounting plate. The ice layer thickness can be accurately controlled, the test result is more accurate, the structure is simple, the cost is low, and the operation is convenient.

The utility model discloses a photovoltaic module environment test transfer device which comprises a placing frame, a plurality of placing grooves are formed in the placing frame, a movable hanging bracket is movably installed on the placing frame, a power device for driving the movable hanging bracket to move is arranged on the placing frame, and the upper end face of the movable hanging bracket is fixedly connected with an installation base. Through the arrangement of the placing frame and the placing grooves formed in the placing frame, photovoltaic modules needing to be processed can be placed in the placing grooves to be transferred during use, a plurality of photovoltaic modules can be placed at a time, the transferring efficiency is high, and through the arrangement of the movable hanging bracket on the placing frame, the photovoltaic modules can be conveniently transferred. According to the photovoltaic module transferring device, the driving motor, the rotating roller, the steel wire rope, the penetrating hole and the hanging plate on the movable hanging bracket are used in cooperation, photovoltaic modules needing to be transferred can be hoisted through the photovoltaic module transferring device, and therefore the photovoltaic modules can be conveniently placed into the containing grooves, the photovoltaic module transferring device is simple and rapid in use mode, high in efficiency, capable of being used in a narrow area and convenient to use.