987 results about "Temperature testing" patented technology

The invention relates to a device for determining the heat-conductivity coefficient. The device comprises a testing cavity, a hot-end heating system, a cold-end cooling system, a vacuumizing system, a temperature acquisition system and a pressure control system, wherein a testing platform is arranged in the testing cavity; and the whole testing platform is of an upper-lower structure and is provided with a heating block, a down-pressing head, a sample to be tested, an upper pressing head and a cooling block in sequence from bottom to top. The device disclosed by the invention has the advantages that the horizontal temperature gradient of the sample to be tested is simulated by arranging multiple horizontal temperature-measuring points, the heat transferring characteristic of the sample to be tested is objectively reflected by multi-point temperature testing, and the more objective value of the heat-conductivity coefficient is obtained by means of data processing. Simultaneously, high-heat-conductivity flexible thin pieces are arranged between the sample to be tested and the pressing heads, so that the thermal contact resistance is reduced and the accuracy of the tested value is improved. In addition, a limiting ring is arranged between the pressing heads, so that the operability and the accuracy of the test in testing the flexible sample are guaranteed. The accuracy and the objectivity of the test for the heat-conductivity coefficient are greatly improved.

A temperature compensation method for denoising a fiber-optic gyroscope on the basis of time series analysis comprises four steps of: step 1, designing an experimental scheme, performing fixed point low and high temperature testing experiment on the fiber-optic gyroscope, and utilizing acquisition software for data acquisition; step 2, performing time series analysis on the zero offset data of the gyroscope, and establishing the mathematical model of the random error of the fiber-optic gyroscope; step 3, adopting a kalman filtering algorithm to filter random noise in the zero offset data of the fiber-optic gyroscope; and step 4, utilizing the data which is de-noised by the kalman filtering to identify the model structure of the temperature shift error of the fiber-optic gyroscope, and calculating the parameters of the identified model. The method establishes the multinomial model of the static temperature shift error of the fiber-optic gyroscope through time series analysis, kalman filtering denoising treatment and identification of the temperature shift error model structure and parameters. The method completely meets the real-time compensation requirement on the project, and has a better practicable value and a wide application prospect in the technical field of aerospace navigation.

The invention provides a novel high-temperature high-pressure explosion limit tester comprising a raw material gas supply apparatus, an explosion determination device, a vacuum generating device, and a controlling device. The explosion determination device is mainly composed of a pressure sensor, a temperature sensor, and an igniter. The explosion determination device is used for determining explosion limit, explosion pressure and explosion temperature of the gas or vapor. The vacuum generating device is used in vacuum pumping upon the explosion determination device. The controlling device is used for determining, controlling and collecting experimental data generated during the experiment. Compared with prior arts, the high-temperature high-pressure explosion limit tester provided by the invention has a temperature testing range of room temperature to 400 DEG C, which is higher than 200 DEG C which is a maximal temperature of instruments in existing standards; the tester provided by the invention has a pressure range of normal pressure to 2.2MPa, which is higher than 1.38MPa which is a maximal pressure of instruments in existing standards; and the tester provided by the invention has a test volume of 10L, which is larger than that of an existing tube-type explosion limit tester, such that a wall effect can be better reduced.

The invention discloses a testing device for simulation and real-time detection of erosion of thermal barrier coatings of turbine blades, belonging to the field of simulation devices in a special service environment. The testing device comprises an erosion particle feeding system, a test testing platform (1), a temperature test system, an acoustic emission nondestructive testing system, a control platform and the like. An erect fixed shaft (101) is arranged on the test testing platform (1) and is connected with a horizontal supporting shaft. The testing device can be used for simulating the erosion service environment in which hard particles in a high-performance aero-engine repeatedly impact thermal barrier coatings of turbine blades due to the driving of airflow. By controlling the parameters such as erosion speed, angle, size and the like of erosion particles, the process that the coatings are eroded by different hard particles in the service process is realized and the real-time test and analysis of data, such as the temperature, the surface topography evolution, the interfacial oxidation of a sample and the like can be synchronously realized. The device can provide an important test platform for effectively assessing the erosion failure process and the failure mechanism of coatings of turbine blades in the special service environment.

The invention provides an apparatus for testing flame propagation and flame suppression in the flammable gas and air premixed gas explosion process. The whole apparatus comprises a combustion pipeline, a water mist generating device, a metal net fire retardance device, a high-speed camera, a schlieren system, a pressure testing system, an automatic gas distribution system, a temperature testing system, an ion probe detection system, a data acquisition instrument, a high-tension ignition system and a synchronous controller. Through the apparatus, flame propagation characteristics and flame propagation rules are researched in the premixed gas explosion process under the influences of factors such as different flammable gas components, different opening states, different ignition positions and different types of flame instability, the effects of stopping agents, fire-retardant metal nets, water mist and the like on controlling and restraining flame propagation are researched, a method and technology for restraining premixed gas flame propagation are developed under the physical-chemical coupling effect, and the inner mechanism of the apparatus is explained.

This invention relates to one rack electricity sending circuit online monitor system and method, which process online test on rack circuit micro wind vibration and wire temperature and bias wind and comprises data monitor device, base station and monitor supportive system, wherein, the data monitor device is in rack send circuit sent to base station through short distance sensor network broadcasting; base station receives the data to send to monitor supportive system center station through mobile communication network; the center station receives the network sending information to fulfill tasks of circuit micro wind vibration and wire temperature testing.

The invention discloses a body temperature testing method and device. The method includes the steps of starting a camera and a first infrared thermodetector when receiving a temperature testing instruction, photographing a user through the camera to obtain an image, recognizing the image, determining the to-be-tested part of the user, obtaining the distance between the first infrared thermodetector and the user, controlling the first infrared thermodetector to measure the temperature of the to-be-tested part of the user when the distance is consistent with a preset distance threshold, and determining the body temperature value of the user or the range of the body temperature value of the user according to a preset rule and the measured temperature, wherein the preset distance threshold is set according to the focal length of a Fresnel lens of the first infrared thermodetector. The device comprises a device body, a microprocessor arranged on the device body, and the camera and the first infrared thermodetector connected with the microprocessor. By means of the method and device, the far-distance precise body temperature testing is realized, and actual requirements are met.

The invention relates to a device and a method for simultaneously testing the permeability of compact rocks under transient state and steady state, and belongs to the fields of rock engineering and unconventional oil and gas reservoir engineering. The testing device for simultaneously testing the permeability of the compact rocks under the transient state and the steady state comprises a three-shaft pressure chamber, a bias pressure control system, a confining pressure control system, an upper end permeating system, a lower end permeating system, a vacuum pumping system, a constant temperature system and a data controlling and collecting system. The method for simultaneously testing the permeability of the compact rocks under the transient state and the steady state comprises the following steps: demarcating the reference volume, providing the confining pressure and bias pressure temperature environment for a sample, and testing the permeability under the transient state and the permeability under the steady state. For the device and the method, the practical bias pressure, back pressure and constant temperature testing environment conforming to the engineering is provided, the fluctuation error of the temperature can be controlled within -0.1 DEG C to +0.1 DEG C, the volume error of the gas can be controlled within 0.3%, and the error of the injected pressure can be controlled within 0.5%. The test of the permeability under the transient state in constant pressure and constant volume ways can be simultaneously realized; when the permeability is tested in the constant volume way, the volume of a reference container can be adjusted according to the volume of a pore.

The invention provides a steam-driven three-dimensional physical simulation system for a thick oil horizontal well. An injection system is used for injecting steam, a chemical agent, gas and saturated oil into a model body; a measuring and controlling system is used for setting the injection system and an output system and acquiring data of each temperature and pressure measuring point inside the model body; the output system is used for finishing well opening, well closing and fixed-pressure production; and a testing oil layer, a pressure sensor, a pressure difference sensor and a thermocouple are arranged in the model body for performing simulation test on the testing oil layer. Due to the adoption of the steam-driven three-dimensional physical simulation system for the thick oil horizontal well, the problems of low pressure, small quantity of temperature testing points, capability of only simulating the influences of each parameter and an injection-production technical way on the steam driving effect under the condition of a vertical well, and the like existing in the prior art are solved, and a horizontal well three-dimensional physical simulation experiment and a three-dimensional physical simulation experiment for increasing the recovery efficiency by adopting a plurality of developing ways can be simulated. The steam-driven three-dimensional physical simulation system has the advantages of wide parameter testing point distribution, high distribution theoretical property, system reliability and safety, easiness for laboratory operation, and the like.

The invention provides a hot melt pressure sensitive adhesive and a preparation method thereof, which solve the problems of improving initial tack, oil penetration and die cutting property, etc. The hot melt pressure sensitive adhesive comprises the following components by weight: 25-40 parts of matrix resin, 48-60 parts of tackifier, 12-22 parts of plasticizer and 0.6-1.2 part of a stabilizing agent, wherein the matrix resin comprises triblock copolymer of styrene-isoprene-styrene and diblock copolymer solution-polymerized styrene butadiene rubber of styrene-butadiene in a weight ratio of 1.2-3.1. The hot melt pressure sensitive adhesive provided by the invention has better initial tack, high peel strength and standard holding power; the hot melt pressure sensitive adhesive is free of oil penetration for seven days under heat temperature testing conditions and can be stored for one year at the normal temperature without oil penetration; the adhesive has better die cutting property; and the softening point reaches to 115 DEG C. The hot melt pressure sensitive adhesive of the invention can totally meet the requirement on fabricating back adhesive bags, labels and adhesive tapes.

The invention relates to an infrared radiation heat flow density reinforcement device for a high temperature pneumatic thermal simulating test of a missile, comprising a quartz lamp heating array, a blower, a variable frequency speed controller, a quartz glass airflow isolation board, a high temperature radiation test piece, a water cooling box, a heat flux sensor, a temperature sensor and a computer. A one-way airflow guiding isolation channel is formed by the quartz glass airflow isolation board, and flow guiding blades are driven to rotate at high speed by a motor of the blower to form a one-way strong airflow; and in the high temperature transient pneumatic thermal test of simulating the hypersonic speed flying of the missile, the strong airflow flows the surface of the quartz lamp heating array in the isolation channel such that the temperature is reduced below the softening temperature of the quartz glass. Because the heat flow density received by the surface of the high temperature radiation test piece of the missile in a heat intensity experiment exceeds the limit of 1 Mw / m<2> when the wind cooling is not carried out, the transient heat flow density can reach 2 Mw / m<2>. The invention provides a more efficient dynamic thermal radiation high temperature testing means for developing the hypersonic speed missile with faster flying speed.

The invention relates to a high and low temperature testing apparatus for a mechanical test. The high and low temperature testing apparatus comprises an electric control system, a high and low temperature environment test box, a heating control system and a refrigeration control system. The electric control system is used for controlling the heating control system and the refrigeration control system, so as to enable the temperature in the box to be continuously and controllably changed; the high and low temperature environment test box comprises a stainless steel box body, a box door, a circulating fan, a thermocouple, a heating resistor, a liquid nitrogen access pipe, a thermal-insulating inserting block, a lighting facility, an inspection window and a dismountable defrosting device. The high and low temperature testing apparatus for the mechanical test disclosed by the invention can be combined with a mechanical tester to be used, so as to achieve a mechanical property test of the material at extreme temperature and realize accuracy control of the temperature; meanwhile, the high and low temperature testing apparatus is provided with the heating control system and the refrigeration control system; the apparatus can implement the high-temperature testing environment and the low-temperature testing environment and is convenient to test the influence of the temperature variation on the material mechanical properties; the high and low temperature testing apparatus is further provided with the inspection window, the defrosting device and the lighting facility, so as to observe the destruction process of the specimen during the high and low temperature testing processes.

The invention provides an in-situ preserving coring system and method, and belongs to the field of in-situ mechanical research of rock masses. The coring system comprises a coring drilling tool and rock core preserving equipment, the coring drilling tool comprises a drill bit and a drilling tool body connected with the drill bit, a pressure testing device is arranged on the portion, close to the drill bit, of the side wall of one end of the drilling tool body, and a temperature testing device and a humidity testing device are arranged above the pressure testing device; the rock core preserving equipment comprises an equipment body, a core storage tube capable of freely sliding in the equipment body in the axial direction is arranged in the equipment body, the core storage tube is a hollow cavity and is used for storing rock cores subjected to drilling, the outer wall of the equipment body is provided with a pressure preserving device, a heat preserving device and a humidity preserving device which are connected with the core storage tube respectively, and a ball valve connected with the front end of the equipment body is further included. The ball valve is switched on, rock core drilling is conducted, the drilled rock cores gradually enter the core storage tube along with drilling of the coring drilling tool, after rock core drilling is completed, the ball valve is switched off, and the drilled rock cores are stored in the sealed core storage tube. The in-situ preserving coring system and method are suitable for mechanical property research of the rock masses.

Shakers and methods of testing suitable for various applications, including those presenting adverse test environments. The shakers have a permanent magnet assembly mounted in a sealed housing for vibration along a shaker axis. The permanent magnet assembly is double ended, and includes at least one shorting ring to hold down the inductance of the driving coils at higher frequencies. Fluid cooling (or heating) of both the shaker housing and the permanent magnet assembly allows placement of the shakers inside a temperature test chamber. The shakers may be coupled directly to the article to be tested, or coupled singularly or in a plurality to a test table to which an article to be tested is coupled. Various embodiments and methods of testing are disclosed.

The invention discloses a heat conductivity testing device, and aims to provide a device which is stable in control of the heat sink temperature and accurate in measurement at temperature testing points. The heat conductivity testing device is achieved by a technical scheme as follows: a cooling unit consists of a rectangular liquid-cooling circulating heat sink cold plate positioned at the bottomend of a heat-dissipating cylindrical disc and integrally formed together with the heat-dissipating cylindrical disc; a heat source cylindrical disc, and a sheet-shaped electric heating source and anupper heat-insulating cushion block which are assembled at the top end thereof, and the heat-dissipating cylindrical disc are coaxially enwrapped in an insulation layer; after a heat source with known constant power is used for heating till a steady state, by virtue of the heat conductivity lambda of a measured material, and according to known heat conductivities of materials of a heating metering unit and the cooling unit, temperature values of testing points D2 and D3 forming gradient distribution in the direction perpendicular to the surface of a test sample are detected through twice measurement, the heat flux Q of the test sample and the temperature difference deltaT between the two ends of the test sample 9 are worked out by using a heat conduction law Fourier formula, and the heatconductivity of the test sample is calculated.

The invention discloses a tester for testing the insulation low-temperature performance of a superconducting electrical component. The tester comprises a vacuum pressure container, a testing container seal flange is arranged at the top of the vacuum pressure container, a low-temperature superconducting testing component is arranged in the vacuum pressure container, a temperature sensor is fixed on the side wall of a low-temperature superconducting testing component and is connected with a temperature and leakage current data acquisition system, the upper end of the low-temperature superconducting testing component extends out of the testing container seal flange and is connected with a high potential line, and an insulating surface of the lower end of the low-temperature superconducting testing component and the side wall of the vacuum pressure container are connected with low potential lines. Through the tester disclosed by the invention, the outside insulation low-temperature DC (Direct Current) resisting high-voltage performance of the superconducting electric component can be detected under Paschen conditions, the testing range of temperature is 4.5-300K, the testing range of air pressure is 103-105Pa, the control precision of the temperature and the air pressure are high, and high voltage and low voltage are convenient to be fed in or out; simultaneously, the purposes of continuously testing the insulation performance under various conditions such as normal pressure and temperature, low temperature and air pressure, thermal circulation and the like can be effectively realized.

A secondary battery testing system comprises a single chip control module, a testing state control module, a data collecting module, a reference voltage module, a charging-discharging module, an inner resistance testing module and an environment temperature testing module. An outputting end of the single chip control module is connected to an inputting end of the testing state control module; the single chip control module is connected to the data collecting module in bidirectional way via data lines and connected to the environment temperature testing module in bidirectional way; outputting ends of the reference voltage module are respectively connected to the inputting end of the testing state control module and the inputting end of the data collecting module; the outputting ends of the testing state control module are respectively connected to the inputting end of the charging-discharging module and the inputting end of the inner resistance testing module; the outputting end of the charging-discharging module and the outputting end of the inner resistance testing module are respectively connected with the inputting end of the data collecting module. The invention can significantly enhance the detctjion accuracy and precision of the battery; the work is stable and reliable with inner resistance testing function, monitoring the inner resistance change of the secondary battery in the discharging process and providing the inner resistance parameter for the selection and match of the secondary battery.

The invention discloses a critical temperature testing system of gunpowder and explosive thermal explosion, comprising a temperature-rising heating unit, a reactor unit, an automatic sample feeding unit, a pressure detection unit and a computer, wherein the temperature-rising heating unit comprises a heat-conducting layer, a heat preservation layer, and a single-cavity heating furnace body containing three groups of heating layers and ceramic heat-isolating layers; and the temperature and the temperature-rising speed of the heating furnace body are controlled by the computer. The reactor unit comprises a testing furnace cover, a lifting basket, a sample tank and a pre-heating furnace cover; the automatic sample feeding unit comprises a furnace body bracket, two stepping motors, a pulley wheel and a steel wire rope; the air pressure detection unit comprises a pressure sensor; the pressure sensor is mounted in the sample tank through the testing furnace cover and is connected with the computer; and the computer is provided with a data acquisition card, an image display control piece and a data processing unit. When the critical temperature testing system is used, a gunpowder or explosive sample with the certain size is placed into a special explosion-proof furnace and the sample is heated at the equal temperature or temperature-rising condition, so as to detect the thermal explosion critical temperature when the sample is combusted or exploded.

A high thermal change rate of test apparatus aims to realize test equipment requirement of highly accelerated life test(HALT) and highly accelerated stress screening(HASS). Structurally, the apparatus is provided with a cabinet body with an interior for placing test specimen. The cabinet body is provided with elements of fans, electric heating tubes and liquid nitrogen nozzles therein. The positions of the cabinet body and the control system are separate. Several groups (normally 2 or 3 groups, depends on the size of cabinet) of liquid nitrogen pipes connecting the cabinet body are flexible stainless steel pipes for enclosing and insulating sleeve tubes. During full-speed temperature cooling, all groups of the pipes simultaneously eject liquid nitrogen. When temperature is constant, only one group of liquid nitrogen pipe with cryogenic valve and nozzles is used and micro-adjusted to achieve good temperature stability. The cabinet body can match different types of shaker combinations to perform temperature / vibration test with high transition rate of temperature, and be used as a single high thermal change rate of temperature cabinet, can have relatively great assembly flexibility in response to test requirement. The entire apparatus has higher mobility and flexibility than conventional temperature / vibration cabinets.

The invention discloses a temperature controlled focal plane detector mechanism, which mainly solves the problem that the conventional focal plane detector mechanism cannot work under different temperature conditions. The temperature controlled focal plane detector mechanism comprises a shell, a cabinet, a detector and a detector mounting base, wherein the detector mounting base comprises a detector support plate and a cold plate; the detector support plate is fixedly connected with the cabinet; the detector is arranged on one side of the cold plate, and is provided with a temperature test sensor; the other side of the cold plate is provided with a refrigerator of which the side far from the cold plate is provided with a heat conducting device; and the heat conducting device and the cold plate isolate and seal the refrigerator. The temperature controlled focal plane detector mechanism can meet the requirements of different working temperatures of the detector; and the detector is not influenced by frosting and pollution when working in various environments (laboratories or space environments), and the environmental heat leak is effectively reduced.

The invention discloses a multi-chip temperature testing and calibrating system and method. The system comprises a DUT register configuration module, a storage module, a host and slave computer communication interface module, an external temperature sensor, a tested chip temperature sensor, a temperature measurement module, a chip detecting and temperature calibrating module, a data processing module and a power control module. The system uses the temperature of the external temperature sensor as calibration temperature so as to increase temperature calibration accuracy and uses a concurrent multi-interface development mode. A serial port may update the ARM. A USB port transmits instructions and data to host and slave computers. An automatic testing method is used for testing the calibrating the tested and calibrated chip so as to prevent repeated work and low efficiency. The system may test and calibrate chips and greatly increase operating efficiency.

The invention relates to a method for follow-up testing of temperature of a steel billet in a furnace, which comprises the steps of primary preparation and the steps of follow-up testing in the furnace. The primary preparation comprises the following concrete steps: (1) drilling a hole on the steel billet to be tested; (2) inserting the hot end part of a thermocouple into the hole drilled in the step (1), and enabling the hot end of the thermocouple to be in contact with the bottom of the hole; filling and compressing the residual space in the hole by the iron powder of which the material is the same as the material of the steel billet to be tested; and (3) connecting the measuring end of the thermocouple to a temperature recorder, enabling the temperature recorder and the steel billet to together enter the furnace, and then, carrying out the steps of follow-up testing in the furnace. The method of the invention can improve the accuracy and the reliability of temperature testing of the steel billet.

The invention provides a free cooling method of hot rolling band steel, which featured in that temperature testing devices and induction feedback devices are arranged respectively at the fine rolling outlet, the coiling inlet and the laminar flow cooling roller way acting as the middle portion of the cooling device; the temperature of the laminar flow cooling water in the three sections are adjusted and controlled after the coiling temperature difference of the head and tail of the band steel and the middle portion of the band steel is tested and fed back. Therefore, the method of the invention can not only control the head and tail temperature of the band steel freely, but also control the length of the head and tail of the band steel freely.

The invention provides a lithium-ion battery matching method and a lithium-ion battery matching system and relates to the technical field of lithium battery production technologies. The lithium-ion battery matching method comprises the steps of battery encoding, first battery grading, second battery grading, first normal temperature testing of batteries, second normal temperature testing of the batteries, internal resistance testing of the batteries and step matching of the batteries. The technical problems that a single-parameter matching method is single in basis and large in error, a multi-parameter matching method cannot present essential differences among the batteries and is poor in balance, and a method of combining the multi-parameter matching method with a charge-discharge curve matching method is complicated in operation process and low in production efficiency are solved. According to the lithium-ion battery matching method, the matched batteries are better in uniformity, the charge-discharge cycle performance is improved, furthermore, other parameters do not need to be tested in the scheme, the influence of the charged state is avoided during matching, and matching canbe carried out in the charged state of an arbitrary low-power battery pack.

The invention discloses a multipurpose ultrahigh-pressure packer tester, which comprises a ultrahigh pressure barrel, a lower sealing structure, a upper sealing structure, a test auxiliary member and a heating jacket, wherein the lower and upper sealing structures are respectively arranged at the lower end and the upper end of the ultrahigh pressure barrel; the test auxiliary member is arranged in the ultrahigh pressure barrel; the heating jacket is arranged on the outer wall of the ultrahigh pressure barrel; the ultrahigh pressure barrel provides a high-temperature and high-pressure testing space; the lower sealing structure is convenient to disassemble, dispose sewage from the barrel and mount a temperature testing component; the upper sealing structure comprises two types, namely a compressed type or an expanding type which are respectively matched with a compressed type or an expanding type packer component to complete the test action, so as to ensure the sealing of the ultrahigh-pressure barrel; the reducing thimble assembly of the test auxiliary member is suitable for the sealing assembly of different sizes to complete the test in the high-temperature and high pressure space; and the heating jacket realizes the full heat exchange between the cold and thermal mediums and the medium in the barrel. In the invention, by using a single ultrahigh-pressure barrel, the high temperature and high pressure test of the compressed type and expanding type packer components of different sizes can be effectively realized in the same container.

The invention belongs to an automatic constant temperature test system for the heat performance of a solar water heater, which comprises a water pipeline system, an electrical control system and a data signal acquisition and analysis system and is characterized in that the water pipeline system is also provided with an automatic constant temperature water device, a backwater circulation utilizing device and a stable-pressure safety device so as to solve the problems of temperature control, heat preservation, and the like in a test process, enable a temperature deviation range of detected water to be controlled within a range from 0.2 DEG C below zero to 0.2 DEG C, and satisfy the detection requirements of the ISO9459-2 standard and the GB / T19141 standard. At the same time, the invention also solves the problems that the full-automatic, multi-station and all-weather detection and the recycling of water sources are difficult, thereby having obvious social benefits and economic benefits.

The invention relates to a milling machine processing system with a cutting fluid nozzle capable of intelligently following up and a working method. The milling machine processing system comprises a workbench; a milling machine tank is arranged on the workbench and provided with a milling cutter mechanism used for machining workpieces on the workbench; a rotary mechanism is installed on the end face, on one side of a milling cutter, of the milling machine tank, is connected with a two-axis linkage mechanism, and drives the two-axis linkage mechanism to rotate around the center line of the milling cutter; the two-axis linkage system is connected with the nozzle through an angle adjusting mechanism and used for adjusting the position and angle of the nozzle; and the milling machine processing system is further provided with an infrared temperature testing module used for collecting the temperature of a machining area, the problems of overheating, waste and the like caused by partial feedliquid insufficiency and partial feed liquid excess are avoided, control is convenient, and sensitivity is high.

The invention discloses a wireless sensing network system for monitoring temperature of power transforming and transmitting system and implementing method thereof. The system includes a power transforming and transmitting facilities internal temperature testing system, and a power transmission line connection part temperature testing system; a wireless temperature monitoring system is composed by combining a ZigBee net and a 433MHz star net, the ZigBee coordinator is provided with a 433MHz radio frequency transmit-receive module, simultaneously as the sub-node of the433MHz star net of the power transforming and transmitting facilities internal temperature testing system, which consists a 433MHz star net with the star net master node of the 433MHz power transforming and transmitting facilities internal temperature testing system. The invention has beneficial effects of high measurement precision; convenient mounting without limitation of some specific structures like switch cabinet body; and no electric association between network appliances, due to the radio wave signal transmission, thereby radically resolving the high-voltage insulation problem. So that the method is an ideal resolving scheme for monitoring temperature of power transforming and transmitting system.

The invention relates to an angle-variable subzero-temperature direct shear apparatus for rock and a test operation method, belonging to the technical field of equipment for rock mechanics testing. The angle-variable subzero-temperature direct shear apparatus comprises a host framework, a vertical loading mechanism, a vertical load support mechanism, a horizontal loading mechanism, a horizontal load support mechanism, a shearing box, a temperature control system, a measurement and control system and a computer system. The shearing box is arranged in an insulation can of the temperature-control system and realizes a subzero-temperature testing environment; the shearing box comprises a shearing box body, an arc slide rail, a rotating member, a wing-shaped fixture block, a semi-circular guide groove plate, a middle separator plate, a swivel positioning mechanism, and front and back end caps; and the shape of the shearing box is maintained unchanged while the internal structure of the shearing box changes from time to time through simple operation, so the purpose of shearing rock samples with different-angle cracks is achieved. The direct shear apparatus for rock and the test operation method can effectively overcome problems in subzero-temperature and angle-variable shearing; and the direct shear apparatus is simple in the principles of the overall structure, convenient to operate, high in visualization degree, changeable in functions and good in applicability.