256 results about "Environmental chamber" patented technology

The present invention premature neonate life support environmental cradle (SEC), adapted by means of shape and size to be accommodated within (i) an incubator for premature neonates; and (ii) a measurement device, especially an MRI device. The SEC is configured for a first at least one open position for accommodating said neonate whilst the SEC is within the incubator, and a second closed position for confinement of the neonate within a sealed volume of incubator atmosphere within the SEC such that the integrity of the confinement is maintained upon removal of the closed SEC containing the neonate from the incubator.

An instrument measures the LED junction temperature directly by taking advantage of the linear relationship between the forward current driven through the LED, the forward drop of the LED, and the junction temperature to determine the LED junction temperature.Calibration is conducted by placing two LEDs from the same family in ambient temperature and passing a small test current through each of the LEDs to obtain the forward drop of the LED at ambient temperature. The LED under test is then placed in an environmentally-controlled chamber where the temperature is raised a known amount above ambient temperature. Known low and high voltage values are associated with the ambient temperature and the environmental chamber temperature, causing the LED under test becomes a calibrated thermometer that can measure its own junction temperature due to the linear relationship between the forward drop and the junction temperature.

The invention provides a manually operated or automated clamping means to seal a solid support substrate to a solid support cover creating a uniform environmental chamber above a specimen mounted to the support substrate. The clamping means may consist of several components that may act ad a system to provide a repeatable and uniform clamping load to the substrate and cover.

An environmental mechanical test apparatus includes a pressure generation source and an isolation cylinder in fluid communication with the pressure generation source. The test apparatus further includes a pressure containment cell configured to receive a test specimen, an environmental chamber disposed about the pressure containment cell, and a load frame operably associated with the pressure containment cell. The pressure containment cell is in fluid communication with the pressure generation source and the isolation cylinder and includes a viewing window.

The invention provides a system and method for testing mechanical properties of a conductor material at a high-temperature vacuum environment. According to the system and the method, the problems that the high-temperature strain is difficult to test, the sample heating efficiency is low, and the like are solved. The system comprises a high-temperature strain test subsystem, a temperature control subsystem and a loading subsystem; and a stretch process is carried out in a vacuum environmental chamber, and a sample is loaded by virtue of a mechanical test machine. According to the method, a Joule effect is adopted, a material is put into the vacuum environmental chamber, the normal temperature absolute vacuum degree can reach 0.025Pa, low voltage and high current are introduced to the conductor material so as to rapidly heat the sample, the loading is carried out after reaching a target temperature, meanwhile, data collection is carried out on a high-temperature deformation field by virtue of a DIC strain test technique so as to obtain a strain field of a whole sample scale distance section and a displacement-load curve of the sample, and subsequent processing is carried out so as to obtain high-temperature tensile / compression modulus and tensile strength of the sample. The system and the method have the advantages of high heating speed, uniform temperature field, high deformation measurement precision and the like.

The invention relates to a method and device for quickly measuring a building material emission key parameter, belonging to the field of indoor environmental tests. The method comprises the following steps: building an effect model for concentration in the measuring device in the building material VOC (volatile organic compounds) emission process; controlling the temperature of the measuring device to be always kept at a set value by a temperature controlling device (such as a constant-temperature water bath); putting a building material to be measured into the measuring device, and sealing the measuring device; in the building material emission process, measuring the concentration of target VOC in the measuring device for several times; finally, taking the average value of the concentration results of the last 2-3 times as a balanced concentration, and taking other concentration results as a hourly concentration; tidying into the mode of logarithm; and then, carrying out linear fit for emission time to obtain a slope and an intercept so as to obtain three key parameters, i.e. initial concentration, diffusion coefficient and distribution coefficient in the building material emission process. The environmental chamber system and the measuring method are simple, have the advantages of short test time and higher precision and are convenient for engineering application.

An environmental chamber includes an ultrasonic nebulizer assembly for controlling the relative humidity within the chamber. The ultrasonic nebulizer assembly is connected in closed-loop fluid communication with an enclosed chamber of the environmental chamber and includes an ultrasonic nebulizer module to generate water vapor that is introduced into the enclosed chamber. The ultrasonic nebulizer module is constructed to be immersed in water within the ultrasonic nebulizer assembly and is readily replaceable by the user. A nebulizer hour timer is provided to monitor the length of time of the ultrasonic nebulizer is operating to provide a precise indication to the user of how much life is left in the ultrasonic nebulizer before it needs to be replaced.

The invention relates to a standard distribution sample for detecting comprehensive performance of an environmental chamber and a detection method thereof and belongs to the field of indoor environment detection. The sample comprises a polytetrafluoroethylene cylindrical container of which the upper end is opened, organic volatile matter VOC liquid accommodated in the container, a barrier layer arranged on the upper end face of the cylindrical container and a sealing device fixing the barrier layer. The method comprises the following steps of: establishing a model; measuring the ventilation rate of the environmental chamber to be detected; placing the sample in the environmental chamber to be detected, placing the sample on an electronic balance, and recording the mass change of the standard distribution sample in real time; when the environmental chamber is in a sealed state, distributing the VOC liquid in the cylindrical container, calculating a distribution rate with the model according to the mass change, and calculating VOC concentration in the environmental chamber; acquiring the VOC concentration at an outlet of the environmental chamber in real time; and comparing the measured value and the calculated value of the VOC concentration to evaluate the comprehensive performance of the environmental chamber. The standard distribution sample and the detection method for the standard distribution sample have the advantages of simpleness and convenience, easy operation and relatively high precision and reliability.

An environmental tester for memory modules has an environmental chamber for heating the memory modules being tested. One side of the chamber is a backplane. The memory modules are inserted into sockets on module motherboards, which are inserted into motherboard sockets on the backplane. On the other side of the backplane, card sockets receive pattern-generator cards that are outside the environmental chamber but electrically connected to the module motherboards through the backplane. The pattern-generator cards contain pattern-generators that generate address, data, and control signals that exercise the memory modules. The pattern-generator cards can be cooled while the memory modules in the environmental chamber are heated. Pattern-generator cards can be removed for repair and module motherboards can be removed for inserting new memory modules for testing.

A spectroscopy system is provided which operates in the vacuum ultra-violet spectrum. More particularly, a system utilizing reflectometry techniques in the vacuum ultraviolet spectrum is provided for use in metrology applications. The system may further include the use of an array detector in combination with an imaging spectrometer. In this manner data for multiple wavelengths may be simultaneously collected. Moreover, the multiple wavelengths of data may be collected simultaneously for a two dimensional sample area. The system may further include the use of a fixed diffraction grating and does not require the use of polarizing elements. To ensure accurate and repeatable measurement, the environment of the optical path is controlled. The optical path may include a controlled environmental chamber in which non-absorbing purge gases are present or in which vacuum evacuation techniques are utilized. The controlled environment may further include a separate instrument chamber and a separate sample chamber. The controlled environment limits in a repeatable manner the absorption of VUV photons.

The invention discloses a system and a method for testing an all-weather tyre tread-road surface frictional characteristic. The test system comprises a console, a speed adjusting motor, a rotary disk, a pressure disk, a hydraulic loading cylinder, a vertical pressure sensor, a tyre tread test block, an environmental chamber, an environment control unit, a horizontal pulling and pressing sensor, a frictional road surface and the like; with the adoption of the system, the friction coefficient measurement between the all-weather rubber tyre tread and road surface covering the change ranges of use working conditions (including various different contact pressures, ambient temperature and humidity, slip velocity and road surface condition) of an automobile tyre can be realized, and an effective technological means can be provided for obtaining a curve of friction coefficient-slip velocity of rubber materials. Combined with the disclosed test system, a test method with short-time contact measurement is adopted in the invention to greatly reduce the influence on the libratory result due to rubber abrasion and temperature rising in the rubber friction coefficient test, and the repeatability and accuracy of the libratory result are remarkably improved.

A pneumatic thermal loading simulation test device for thermal shielding materials comprises a stainless steel environmental chamber, two heating copper electrodes, a single / double colored infrared thermometer, a power supply secondary system, a gas supply secondary system, a vacuum extraction secondary system, a cooling cycle secondary system and a programmable logic controller (PLC) system. The stainless steel environmental chamber is fixed on the ground through supports and insulated from the ground. Three observation windows are arranged on the stainless steel environmental chamber, and the two heating copper electrodes are connected with the power supply secondary system through cables. A gas sprayer is arranged above thermal shielding material samples, and the vacuum extraction secondary system adjusts pressure in the stainless steel environmental chamber. The power supply secondary system is connected with an industrial power wire net. The heating copper electrodes are hollow and connected with the cooling cycle secondary system for cooling in water-cooling mode. The thermal shielding material samples are fixed between the two heating copper electrodes through a copper fixture. The single / double colored infrared thermometer is connected with the PLC system in electric signals mode. The pneumatic thermal loading simulation test device is simple to operate, wide in adjustment range, low in cost, and can be applied to principle researches of pneumatic thermal loading of the thermal shielding materials.

A method and apparatus controls fans and power supplies to provide accelerated run-in testing. By modulating fans to increase case temperatures and adjusting power supplies to provide “worst case” voltages, a computer system can be subjected to a run-in tests under taxing conditions. By alternately cooling and heating devices such as CPUs, devices can be subjected to mechanical stresses associated with power-on / power off cycles. A time based test implements the present invention based on time, and a temperature based test implements the present invention based on temperature. The present invention can be used to implement a run-in test in which the computer system is operated at an elevated temperature, thereby achieving results similar to those achieved by performing a run-in test in an environmental chamber at an elevated temperature. Alternatively, the a run-in test can be performed by repeatedly cycling the temperature between relatively high and low values.

A system and method for environmental testing and evaluation of non-destructive inspection (NDI) sensors is provided. The system has a structure having a plurality of NDI sensors to be tested. The system further has an environmental chamber containing heating elements and cooling elements for heating and cooling the NDI sensors when the structure is secured to the environmental chamber. The system further has an impact testing assembly positioned over the structure for impacting the structure. The system further has a data acquisition computer subsystem coupled to the environmental chamber and coupled to the NDI sensors. The data acquisition computer subsystem controls and monitors the heating and cooling elements, and collects and processes temperature and impact data acquired by the NDI sensors.

The invention discloses a calibration system of humidity-temperature sensor, comprising a calibration chamber of which the top is provided with multiple to-be-measured sensor sockets for mounting to-be-measured sensors; an environmental chamber arranged below the calibration chamber and comprising a saturated salt solution container that is used for holding saturated salt solution and arranged in the heat transferring medium of a water bath tank, and the water bath tank; a temperature control chamber arranged below the environmental chamber and used for fast heating or cooling the water bath tank; a thermal container which is used for keeping the measurement environment stable and in which the calibration chamber, the environmental chamber and the temperature control chamber are arranged; and a control circuit for controlling the heating or cooling of the temperature control chamber. The invention also discloses a calibration method of humidity-temperature sensor. The invention realizes the calibration of humidity-temperature sensor by the same system, and is compactly structured, simple and practical. The calibration has small time consumption and is convenient for practical operation. The calibrating device of the invention is simple, has small volume, can realize portable measurement, has cheap material and low cost, and can be popularised and applied in large scale.

The invention provides a high-power non-contact type rapid laser heating device which comprises an adjustment bracket, a camera lens, an optical fiber, a CaF2 window, a first cooling circulating water pipe, a semiconductor laser, a programmable logic controller (PLC) subsystem, a thermoelectric couple temperature sensor, a resistance vacuum gauge, an electromagnetic valve, a refrigerator, a vacuum solenoid valve, a vacuum pump, a thermocouple probe, a second cooling circulating water pipe, a sample, a water-cooling bracket, an air inlet valve, an environmental chamber and a vacuum flange. The rapid laser heating device is in non-contact type, adjustable in output power linearity and low in cost. The high-power semiconductor laser enters the optical fiber by coupling and then generates high heating flux load by a converging combination lens, and heat prevention / insulation material in the environmental chamber can be heated, so that the service performances such as thermal shock, oxidation, ablation and the like can be tested.

Apparatus tests the durability of a peripheral artery medical device based upon anatomical loading conditions. A peripheral artery medical device is mounted to a support element, typically a hollow tube, having first and second end portions. End holding elements are mounted to a base and are secured to the first and second end portions. The apparatus further comprises means for applying a plurality of cycles of at least one of the following loading conditions to the medical device support element at the location of the peripheral artery medical device: torsion, tension / compression, bending and pinching. In some embodiments the apparatus comprises an environmental chamber housing at least the support element so to mimic the service temperature environment of the medical device. A method for testing the durability of a peripheral artery medical device based upon anatomical loading conditions is also disclosed.

The invention relates to a hydraulic hose performance test experiment table mainly comprising an electric control system, an impact load system, a bending driving system of a hose to be tested, and anenvironmental simulator which are connected mutually, wherein the impact load system mainly comprises a hydraulic oil pump I, an unloading spillover valve, an accumulator, a two-position four-way magnet valve, a throttle , a pressure booster, a stop valve, a counterbalance valve, an oil return filter I, a pressure gauge, a pressure sensor, an oil tank, a connection oil pipe, a joint, and the like; the bending driving system of a hose to be tested mainly comprises a hydraulic oil pump II, a safety valve, an oil return filter II, a three-position four-way magnet valve, a hydraulic oil cylinder,a connection oil pipe, a joint, and the like; and the environmental simulator mainly comprises an environmental chamber body and an electric heater, an ultraviolet emitter and a bending degree controller of a hose to be tested, which are arranged in the environmental chamber body. The experiment table can test a plurality of hoses simultaneously, test the experimental pressure wave shape of the hoses to be tested on line and estimate the fatigue lifetime of the hoses to be tested; and the invention has simple structure, easy operation, little energy consumption and high reliability.

A method and apparatus (5) for simulating and analyzing industrial thermal processes, including industrial heat-treatment, processes, melting, solidification, quenching and the like, used in the manufacture of metals, alloys and metal matrix composite components. The apparatus (5) includes an optional environmental chamber (10) used for situations where testing room conditions are too hot or too cold and would thus interfere with operation of the apparatus (5) without such chamber (10). The apparatus (5) includes a multifunctional excitation coil (40) that serves the function of the omitted environmental chamber (10). The apparatus (5) also includes one or more high frequency resonant inverters (15) and a cooling means (20). The apparatus (5) integrates melting and thermal processing capabilities with a thermal analyzer and a control system. The apparatus (5) allows for the rapid design and optimization of industrial thermal processes used in the manufacture of metallurgical engineering material with superior structural and metallurgical chactacterics, suitable for advanced component service performance.

The invention relates to a double-chamber system used for the release detection of volatile chemical pollutants of indoor building materials, belonging to the field of indoor environment tests. The system comprises two identically designed environmental chambers, one stainless steel shell simultaneously supporting the two environmental chambers and providing water bath spaces and one set of water-bath heater providing constant temperature hot water, wherein two holes with the diameter of being identical with that of each environmental chamber are arranged on the top part of the stainless steelshell, and the two environmental chambers are arranged in the inner space of the shell by the two holes and then welded and fixed; and each environmental chamber comprises one cylindrical chamber body, a chamber cover the diameter of which is identical with that of the chamber body, a sealing ring pressed between the chamber body and the chamber cover and an annular sealing clamp groove clampingthe chamber body, the sealing ring and the chamber cover together. The double-chamber system is compact, portable, simple and reliable, does not adsorb VOCs and has excellent sealing performance, airin the chambers is uniformly mixed, and the manufacturing cost is not high. A parallel experiment, a repeated experiment and a contrast experiment can be simultaneously carried out by using the two chambers for measurement, thus shortening the detection time.

A system for measuring the critical temperatures for thermal cracking of asphalt binders. The exemplary embodiment comprises a metal ring, at least one strain gauge attached to the inner surface of the ring, an environmental chamber, and a data acquisition system. A thermocouple may also be attached to the inside of the ring to monitor the ring temperature. A mold is provided for creating a circular asphalt binder test specimen. When properly cast, the specimen encircles the metal ring. The specimen and ring are placed within the environmental chamber for analysis as the temperature within the chamber is lowered. Thermal stress induced by temperature reduction within the asphalt binder test specimen is monitored by the strain gauge(s) and the cracking temperature is directly determined from the strain reading.

The invention provides an experiment cabin system capable of adjusting atmospheric environmental pressure. The system is characterized by comprising an experiment cabin arranged in a constant-temperature constant-humidity environmental chamber and a positive and negative pressure generation unit, a ventilation adjusting unit, an air purification unit, a meteorological sensor and a system control unit controllable both in and out of the cabin, which are arranged to be communicated with the cabin. Compared to the prior art, the invention has the following advantages: 1, the system can realize control of the environment condition of atmospheric pressure in research and experiments on tobacco and is applicable to control of atmospheric pressure in most regions where people live; 2, the inner space of the system is great, which enables a plurality of staff to simultaneously carry out experiments; 3, the comprehensive air purification unit is provided in the cabin, which enables collection and purification of harmful gas generated after combustion of tobacco to be realized; 4, the system is simple to operate and enables single-key operation and comprehensive information prompting to be realized in normal usage; and 5, security design and humanized design of the system are considerate, an automatic safety device is arranged in the cabin, and hand-operated safety devices are arranged in and out of the cabin.

The invention discloses a test room for evaluating the comfort of an air conditioner. The test room comprises a dwelling and an outdoor environmental chamber surrounding the dwelling. The dwelling is of a civil building structure of a reinforced concrete frame and brick walls. A temperature field measurement matrix, a humidity field measurement matrix, an airflow field measurement matrix, a heating unit and a humidity emitter are arranged in the indoor space of the dwelling. The outdoor environmental chamber is of a heat preservation refrigeration house structure and is provided with a refrigerating unit and an air conditioning unit which are used for creating various outdoor temperature-humidity climatic environments. After sensing signal data of temperature, humidity and airflow are collected through a computer, a three-dimensional or two-dimensional color data distribution cloud picture of the temperature, the humidity and the airflow of the room is generated and is used for analyzing comfort parameters of an air conditioner environment created by the air conditioner.

A method and apparatus for controlling the temperature of an environmental chamber by controlling the flow of refrigerant, the number of compressors and fans as necessary to produce and preserve precise temperature conditions within the chamber which uses less energy than available systems.

The invention discloses a small device for load bending fatigue testing and a method. The device comprises a base, a gantry, a linear motor module, a linear motor module bracket, a load sensor, a thrust rod guide wheel assembly, a thrust rod, a specimen fixed end clamp right support table, a specimen cantilever end clamp assembly, a displacement sensor test connective rod, a displacement sensor, adisplacement sensor bracket, a fatigue specimen, a specimen fixed end clamp assembly, an environmental chamber, a specimen fixed end clamp left support table, and control system. The small device forload bending fatigue testing and the method provided by the invention can realize fatigue testing of stress control, strain control, and stress / strain hybrid control, and achieve a bending fatigue performance testing with a stress ratio greater than zero, equal to zero, or less than zero. The advantages of the device are reasonable in structure design, complete in function, and convenient in operation.

The invention discloses an environmental chamber for a multi-parameter composite test, comprising an airtight case which is connected with a case cover in a sealing mode, wherein the case and the case cover both comprise an outer layer made of metal to ensure the rigidity of the case and an insulation layer made of metal to maintain the internal temperature of a composite cavity, the inner cavity of the case forms an environmental composite cavity independent to the external; the composite cavity is successively provided with a noise generation mechanism fixed on the upper part of the composite cavity, a temperature control mechanism fixed on the wall of the composite cavity, a vibration generation mechanism, an air intake and an exhaust port from top to down, wherein the vibration generation mechanism is arranged in the composite cavity and is in linkage with an external vibration source, the air intake is connected with an air pump and used for introducing air into the composite cavity to form a pressure filed, and the exhaust port is connected with a vacuum generator in a sealing mode. The invention has the advantages of being capable of fully stimulating the working environment of parts and having good test result and high accuracy.

In a method for controlling the temperature inside an environmental chamber using an electronic device, a target temperature T0, and a current internal temperature T and a current humidity level RH inside the environmental chamber are acquired. A current dew point Td of air inside the environmental chamber is calculated using a dew point calculation formula requiring the current internal temperature T and the current humidity level RH. The surface temperature of an object under test which is placed in the environmental chamber is detected using a temperature sensor. The environmental chamber is controlled according to the target temperature T0, the current internal temperature T, the current humidity level RH, and the surface temperature of the object under test.

The invention relates to an experimental device for measuring the formaldehyde adsorption property of adsorbent and a measuring method thereof, belonging to the field of indoor environment measurement. The experimental device comprises a thermostatic waterbath being capable of setting the temperature, a compressed gas cylinder for providing carrier gas, a primary and bypass path flow controller for controlling and measuring air flow, a gas-washing bottle containing distilled water, an environmental chamber provided with an outer housing, an acousto-optical gas analyzer and a display; a gas inlet and a gas outlet are arranged on the opposite lateral walls of the environmental chamber, and a stirring fan and a sampling hole are arranged at the top of the environmental chamber. And the acousto-optical gas analyzer is connected with the gas inlet and the gas outlet through pipelines. An experimental method utilizes the acousto-optical gas analyzer to detect the formaldehyde equilibrium concentration in the blank environmental chamber without the adsorbent and the environmental chamber with the adsorbent on line at the real time and obtains the formaldehyde adsorption property of the adsorbent by calculation. The experimental device and the measuring method thereof can control the temperature and the moisture better, and has simple and convenient operation and higher precision and reliability.

The invention relates to a test platform for hardware-in-the-loop simulation of a power storage battery system. The test platform comprises a monitoring computer, an object computer, an electronic load, an environmental chamber, a programmable digital power source and a hard wire signal generator, wherein the monitoring computer and the object computer are connected, and the electronic load, the environmental chamber, the programmable digital power source and the hard wire signal generator are respectively connected between the object computer and the power storage battery system. Compared with the prior art, the test platform disclosed by the invention has the advantages that real vehicle test times are reduced, the cost of development is saved, a testing process is simplified, the automation of the testing process is realized and the like.