30results about How to "Short heat equilibration time" patented technology

The invention discloses a three-axis permeability testing method, and belongs to the field of coal bed gas exploitation. A rock sample is placed in a model system (1), then pressure pulse is applied on the rock sample; a gas control system (2) supplies test gas to the model system (1); a temperature control system (3) controls the temperature of the model system (1); a three-axis loading system (4) applies confining pressure and axial pressure on the rock core clamper of the model system (1); a vacuumizing system (5) vacuumizes the test device; a gas sample collecting system (6) detects the gas components after the test; and an electrical controlling and monitoring system monitors the test process. The method comprises following steps: filling a sample into a tank, checking the airtightness, carrying out a permeability test, and cleaning the test system. The provided method can simulate a high temperature and high pressure environment of a deep stratum in a lab; pressure pulse is applied on the inlet end of a rock sample, the attenuation data of pressure pulse can be obtained, and then the rock sample permeability is calculated based on the attenuation data. The test efficiency ishigh, the external interference is little, and the test result is more accurate.

The invention relates to a thermal conduction mechanism of a weighting sensor temperature compensating testing device, which consists of two groups of conduction fastening devices symmetrically arranged on a test platform and having same structure, wherein each conduction fastening device comprises a base, a conduction board, a cooling plate, a fan, an air cylinder, a bracket and a spring, the air cylinder is arranged on the base, the piston rod of the air cylinder is connected with the rear part of the bracket, fastening pieces pass through supporting seats at two sides of the cooling plate to be connected in threaded holes at two sides of the bracket in a screwed way, and springs are also arranged between the supporting seats of the cooling plate and the bracket, the rear part of the cooling plate is provided with the fan, and the front end of the cooling plate is provided with the conduction board; two conduction boards on the two conduction fastening devices correspond to each other, and a distance a for placing a weighting sensor is left between the two conduction boards. The invention can enable the weighting sensor to quickly reach thermal equilibrium of tested temperature while carrying out temperature compensation test to the weighting sensor, thereby saving energy and greatly enhancing the test efficiency of the test.

The invention relates to a deoxyribonucleic acid (DNA) fragment amplification and quantitative detection system based on closed reactors, belonging to the technical field of molecular biology detection systems. The DNA fragment amplification and quantitative detection system comprises an amplification unit. A group of closed reactors are arranged in the amplification unit in a matching way. An exciting light device and a fluorescence detection device are arranged on one side of each closed reactor in a matching way. A transmission device which is used for providing power to the closed reactors is arranged at the bottom of the amplification unit in a matching way. The transmission device is connected with a motor. Two or more than two independent constant-temperature areas at different temperatures are arranged in the amplification unit in a matching way. By adopting the technique, the thermal response of reagent samples is improved, the polymerase chain reaction process is accelerated and the experimental period is greatly shortened; the degradation of DNA enzymes is reduced, the amplification sensitivity, accuracy and reproducibility of the samples are improved and the reagent detection linearity range is expanded; the pollution risk during experiments is reduced; the optical path is shortened and the sensitivity and the low background of optical detection are improved; and the low-cost multi-sample multi-channel detection is realized.

The invention discloses a laser energy meter probe, which comprises an absorber, and is characterized in that the absorber comprises a first absorbing sheet, a second absorbing sheet and a third absorbing sheet, wherein the first absorbing sheet, the second absorbing sheet and the third absorbing sheet are sequentially arranged according to the laser transmission direction, the first absorbing sheet, the second absorbing sheet and the third absorbing sheet are integrally connected through thermal bonding, the thermal bonding surface is the largest surface of the first absorbing sheet, the second absorbing sheet or the third absorbing sheet, an absorption coefficient of the first absorbing sheet is less than an absorption coefficient of the second absorbing sheet, and the absorption coefficient of the second absorbing sheet is less than an absorption coefficient of the third absorbing sheet. The absorber of the laser energy meter probe is used for absorbing laser energy in a gradient manner, the thermal equilibrium time and energy loss during the measurement process are reduced, and the measurement accuracy of the laser energy meter is significantly improved.

The invention discloses a computer-based temperature and humidity adjusting method. The computer-based temperature and humidity adjusting method comprises the steps that 1, the indoor temperature value and the outdoor temperature value are collected; 2, the collected indoor temperature value is compared with the preset indoor temperature value, if the difference between the indoor temperature value and the preset temperature value is within the preset range, an air conditioner is started, the indoor temperature value is collected every 1-3 min, and the air conditioner is shut down when the indoor temperature value is equal to the preset temperature value, and if the difference between the indoor temperature value and the preset temperature value is beyond the preset range, the air conditioner is started, the indoor temperature value and the outdoor temperature value are collected every 1-3 min, and the air conditioner is shut down when the indoor temperature value is equal to the outdoor temperature value minus the preset indoor and outdoor temperature difference value; and 3, the indoor humidity value is collected, and the collected indoor humidity value is compared with the preset humidity value. The computer-based temperature and humidity adjusting method achieves automatic control over the indoor temperature and the indoor humidity.

The invention discloses an automatic indoor environment adjusting method. The automatic indoor environment adjusting method comprises the steps that 1, the trigger action for collecting an indoor temperature value and an outdoor temperature value is detected; 2, the indoor temperature value and the outdoor temperature value are collected; 3, the collected indoor temperature value is compared with the preset indoor temperature value; 4, the indoor humidity value is collected, and the collected indoor humidity value is compared with the preset humidity value; and 5, when the trigger action for stopping collecting the indoor temperature value and the outdoor temperature value is detected, collection of the indoor temperature value and the outdoor temperature value is stopped, and a standby state starts. By taking the indoor temperature value, the indoor humidity value and the indoor temperature and outdoor temperature difference value suitable for human bodies into comprehensive consideration, intelligent automatic control and remote control are carried out on the indoor temperature and the indoor humidity, and the indoor environment is more suitable for working and living of people.

The invention provides a heat conductivity coefficient quick test device and method of a vacuum insulating board. The heat conductivity coefficient quick test device mainly comprises a test hemisphere consisting of an inner hemisphere, an outer hemisphere and a base plate, wherein the outer hemisphere is used as a thermal protection sphere; the inner hemisphere is used as a test sphere; fluid with favorable heat-conducting performance and heat capacitance is filled and sealed in the hemisphere; liquid in the outer hemisphere is heated to the set temperature; an additional heating device in the inner hemisphere is opened to heat the liquid in the inner hemisphere to the set temperature; a test sample plate is laid below an experimental device to test and acquire the point-testing temperature corresponding to the center of the inner hemisphere on the lower surface of the sample plate; and the temperature is read after being stabilized. The heating power of the inner hemisphere is used as the heat flow of the sample plate; a round bottom surface of the inner hemisphere is used as a test area; and the heat conductivity coefficient can be solved according to a formula. The device has the advantages of simple structure, simple operation process, short test time, high efficiency, accurate test result and remarkable energy-saving effect and is portable.

Disclosed is a method for preparing coatings with high broadband absorptivity at terahertz waveband. The method comprises the steps of step one, taking silicon carbide particles and black paint; step two, mixing the silicon carbide particles with the black paint; step three, spraying the mixed silicon carbide particles and the black paint on the surface of a substrate material; and step four, drying the substrate material with the mixed silicon carbide particles and the black paint sprayed to complete preparation. The coating material is simple to prepare, high in absorptivity and broad in absorption band, complete absorption of electromagnetic radiation broadband with the frequency higher than 0.05 THz (corresponding wavelength shorter than 6mm) is achieved through mixing of the silicon carbide particles with the black paint, and the coating can be used for absolute measurement of terahertz waveband radiation intensity and invisibility of targets in the terahertz waveband.

The invention discloses a high-speed asynchronous motor electric spindle internal and external cooling structure and temperature cooperative control system. A mouse cage type cooling flow channel is machined in an electric spindle core, and a high-speed rotating joint is connected with the back end face of the electric spindle core in a fastening manner in order to achieve input and output of a cooling medium in the cooling channel; meanwhile, an annular cooling flow channel is machined around a motor stator in an electric spindle shell, an annular cooling flow channel is machined around a front bearing in a front bearing pedestal, an annular cooling flow channel is machined around a back bearing in a back bearing pedestal, and the annular cooling flow channels are connected in series and communicate with the outside through the shell. A forced circulation cooling system is formed by the internal and external cooling structure, the temperature and the flow of cooling liquid in the internal and external channels are adjusted by the temperature cooperative control system according to temperature feedback of key points, and circular and efficient cooling of an electric spindle system is achieved under the variable working condition. According to the high-speed asynchronous motor electric spindle internal and external cooling structure and temperature cooperative control system, direct and efficient cooperative forced circulation cooling on high-speed asynchronous motor electric spindle main heating parts such as the motor stator, a motor rotor, the front bearing and the back bearing can be achieved, thermal deformation of an electric spindle is reduced, and the thermal stability of the electric spindle is improved.

The invention discloses a high-power current converter low-temperature testing method. According to the high-power current converter low-temperature testing method, a cooling tower is turned on afteran environmental cabinet is low-temperature stable, the cooling tower utilizes cold air in the environmental cabinet for cooling a current converter and a cooling liquid in the cooling tower, the temperature of the cooling liquid can be reduced to the low-temperature ambient temperature of the environmental cabinet rapidly through heat transfer, the cooling liquid cools components in the current converter rapidly at the same time, the heat balancing rate is greatly increased, the heat balancing time is shortened from 16-20 h to 8-10 h, and a lot of testing time and energy consumption are saved. The high-power current converter low-temperature testing method tests a full-power feature testing method of the high-power current converter in a low-temperature state, assesses the performance ofthe current converter and the cooling tower in the low-temperature state comprehensively, can effectively verify the adaptability of the current converter product in a low-temperature environment. Onthe premise that thermal load capacity of the environmental cabinet is large enough, the cooling tower is placed into the environmental cabinet for conducting a low temperature test, the low temperature start-up condition of the current converter is simulated in a most real manner, and the low temperature start-up performance of the current converter is verified truly and effectively.

The invention provides a novel temperature control system suitable for microresonators. The microresonator temperature control system is composed of a microresonator, a microresonator drive circuit, a temperature control circuit and a temperature executive component, wherein the microresonator adopts a pectinate resonator structure; the microresonator drive circuit adopts an automatic gain control mode; the microresonator drive circuit and the microresonator form a closed loop circuit; the microresonator drive circuit ensures that the microresonator generates stable oscillating signals; the temperature control circuit measures the signals of the microresonator drive circuit as the temperature changes, and outputs the signals to the temperature executive component after calculation and amplification; and the temperature executive component ensures the temperature of the microresonator to be constant under the action of the temperature control circuit. By utilizing the inherent temperature characteristics of the Q value of the microresonator, the invention does not need a temperature sensor, thereby reducing volume and cost of the temperature control system, enhancing precision of temperature detection and shortening response time of the temperature control system.

The invention provides a method for improving a magnetic heat generating rate of calcium phosphate magnetic bone cement. A hydrothermal method is utilized to synthesize a Fe3O4 magnetic functional phase, carbon powder is utilized to modify the synthesized Fe3O4 magnetic functional phase, and then the modified Fe3O4 magnetic functional phase is compounded with solid-phase phosphate powder to prepare the magnetic bone cement. According to the method disclosed by the invention, the carbon powder is utilized as a modifying agent, and ferroferric oxide and a bone cement matrix are separated; compared with a modified material without carbon powder being added, temperature rise of the material is quicker, time for achieving temperature rise balance is shorter, thermal therapy time is shortened, and a thermal tolerance effect caused by too long heating time is reduced.