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

The invention discloses a three-axis permeability test and CO2 displacement simulation test device, and belongs to the field of coal bed gas exploitation. The device is composed of a model system (1),a gas control system (2), a temperature control system (3), a three-axis loading system (4), a vacuumizing system (5), a gas sample collecting system (6), and an electrical controlling and monitoringsystem. The gas control system (2) supplies gas for a test. The temperature control system (3) controls the temperature of the test. The three-axis loading system (4) supplies confining pressure andaxial pressure. The gas sample collecting system (6) collects a gas sample and analyzes the gas components. The electrical controlling and monitoring system monitors the test. The device can simulatethe CO2 displacement process in a lab; moreover, by measuring the pressure pulse applied on the inlet end of a rock sample, the attenuation data can be obtained, and then the permeability of rock sample is calculated. The device has the advantages that the temperature control precision is high, the temperature fluctuation is small, and the device is easy to control and install and is safe and reliable.

The invention relates to LED heat resistance measuring technologies, in particular to a high-power LED heat resistance measuring device and a method of measuring high-power LED heat resistance thereby, and aims to solve the problem that the existing high-power LED heat resistance measuring device is low in measuring precision. LED junction temperature is controlled by controlling surface temperature of a measuring base; according to the semiconductor physical feature that LED junction temperature and heat resistance are of certain linearity, the LED junction temperature and the heat resistance are measured by measuring LED junction voltage drop. A standard power source provides an LED with standard current; a temperature control device uses PID regulating technology, and the temperature of the measuring base is balanced fast; through the adoption of contact measurement, the base and LED thermal balance period is shortened greatly; when the temperature is balanced, spot measurement of LED junction voltage drop is performed fast with low current; through the measurement of junction voltage drops of multiple temperature spots, LED voltage temperature coefficient is calculated. The high-power LED heat resistance measuring device and the method have the advantages that measuring speed is high, operation is simple, measurement precision is higher than +/-1%, and the device and the method are applicable to high-power LED heat resistance measurements.

The invention discloses a CO2 displacement simulated testing method and belongs to the field of coal bed gas exploitation. A rock sample is placed in a model system (1), 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 a confining pressure and an axial pressure on the rock core clamp of the model system (1); a vacuumizing system (5) vacuumizes the testing device; a gas sample collection system (6) detects thegas components after the test; and an electric controlling and monitoring system monitors the test process. The method comprises following steps: filling a sample into a tank, checking the air tightness, simulating the displacement, and cleaning the test system. The provided method can simulate the high temperature and high pressure environment in a deep coal layer in a lab; by applying pressurepulse on the rock sample inlet port, a simulated CO2 displacement test can be realized; the test efficiency is high, the external influence on the test is small, and the test result is more accurate.

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 belongs to the technical field of equipment measurement and especially relates to a container volume measurement device and a measurement method based on secondary micro-variation allowance pressure principles. The measurement device comprises a measured container, wherein the measured container is connected to a differential pressure sensor and an isothermal reference container (4) by a pipeline; a precise piston is disposed between the measured container and the differential pressure sensor (3), and a left valve is connected between the differential pressure sensor and the precise piston; and a right valve is connected between the isothermal reference container and the differential pressure sensor. The measurement device is used for container volume measurement and can be used in rapid, accurate and nondestructive volume measurement of various kinds of containers with complicated structures.

The invention discloses a thin film hydrogen sensor with a self-heating function and a temperature compensation function. The thin film hydrogen sensor comprises a shell, a top cover, a sensor chip and an adapter circuit board. The adapter circuit board is arranged on the bottom part of an inner cavity of the shell; the sensor chip is arranged on the adapter circuit board; a welding plate is arranged on the adapter circuit board; a terminal of the sensor chip is connected with the welding plate; an inner end of a cable penetrates through a cable hole so as to be connected with the welding plate; the sensor chip is sequentially provided with a base layer, an insulation layer, a lower-layer hydrogen resistance layer, a heating/temperature measuring layer, an upper-layer hydrogen resistance layer, a hydrogen sensitive layer and an anti-oxidation layer from bottom to top; the heating/temperature measuring layer is provided with a temperature measuring resistance wire and a heating resistance wire; the hydrogen sensitive layer is provided with a hydrogen sensitive resistance wire. According to the thin film hydrogen sensor provided by the invention, the heating resistance wire is arranged on the sensor chip, so that the sensor chip has a self-heating function; the sensor chip is packaged into a sealed inner cavity of the shell, so that a temperature compensation function is conveniently improved, and the measurement accuracy is improved; through arranging the adapter circuit board, the thin film hydrogen sensor is convenient to apply.

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 discloses a novel steel rail thermometer. The novel steel rail thermometer comprises a hand-held device terminal and a temperature measurement terminal which are connected by use of a communication cable, wherein the hand-held device terminal comprises an OLDE display screen arranged in an electronic chamber, a thin-film key panel and a power supply battery; the power supply battery is fixed inside the electronic chamber to supply power for the OLDE display screen and a single-chip electronic circuit; the single-chip electronic circuit receives the input signal of the thin-film key panel and controls the electronic display screen to display the input signal, and the single-chip electronic circuit is in communication connection with the temperature measurement terminal by use of the communication cable; the temperature measurement terminal comprises a metal shell formed by an outer shell and an inner shell nested into the outer shell, an annular magnet nested between the inner shell and the outer shell, a circuit board fixed on the inner shell, and an infrared thermometer welded on the circuit board and facing the open end of the metal shell; the open end of the metal shell is sealed by a heat-conducting silver piece. The novel steel rail thermometer is light and secure in structure, convenient to operate, good in protective properties, high in accuracy and high in temperature measurement response speed.

The invention provides an active compensation heat preservation method and a pipeline heat preserving structure for implementing the method, wherein the method and the structure are mainly used for heat preservation of hot gas conveying pipelines. An electromagnetic induction coil is arranged between the surface of a pipeline and a heat-preserving layer or in the heat-preserving layer of the pipeline, the pipeline serves as an electromagnetic induction heating body, pipeline heat preservation heat loss is calculated or measured, electromagnetic induction heating capacity compensates 10-90% of the pipeline heat preservation heat loss, the method and the structure are suitable for pipeline heat preservation when temperature of fluid in the pipeline ranges from 200 DEG C to 1000 DEG C, and the defects that an existing hot gas conveying pipeline is high in heat preserving cost, long in heat balance time, large in hot gas secondary heating investment, low in reliability and high in operation cost are overcome.

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.