119results about How to "Guaranteed temperature stability" patented technology

The invention relates to an integrated electric field sensor based on common path interference, and belongs to the technical field of electric field measurement. The sensor comprises a lithium niobate substrate, a silicon substrate, a gasket, a probing unit and a modulation unit, wherein the lithium niobate substrate and the silicon substrate are adhered and connected with each other through ultraviolet curing glue and are respectively adhered an connected with the gasket through the ultraviolet curing glue, the probing unit comprises two upper contact electrodes, a connecting wire and two dipole antennae, and the modulation unit comprises two lower contact electrodes, an optical wavegudie and two modulation electrodes. With the adoption of the electric field sensor, the temperature stability is good; on the basis of ensuring that the size of the sensor is small, the sensitivity and a dynamic range of the electric field measurement are obviously improved; and according to the two-dimension electric field sensor designed by the invention, the axial directions of two pairs of antennas in the probing unit are orthogonal and combined with the modulation unit, thus realizing the two-dimension electric field measurement.

The invention discloses a method for testing low-frequency noise of an amorphous silicon membrane, and specifically relates to a testing technology of low-frequency current noise of the amorphous silicon membrane. A testing system adopted by the testing technology comprises a biasing circuit, an electromagnetic shielding device, a noise amplifying system and a data acquisition and processing system. Firstly, the low-frequency current noise of the amorphous silicon membrane is motivated through the biasing circuit, sample low-frequency noise is amplified through a low-frequency noise current amplifier, amplified noise signals are acquired through a data acquisition card, corresponding current noise signal power spectral density is calculated, finally data are analyzed and processed through a computer, and a power spectral density curve of the low-frequency noise of the amorphous silicon membrane is obtained. The method for testing the low-frequency noise of the amorphous silicon membrane can be used for testing the low-frequency noise of the amorphous silicon membrane repeatedly and accurately, and is fast and convenient.

The invention discloses an online control method for the finish rolling temperature of precision rolling strip steel and belongs to the field of temperature control of rolling processes. The second flow regulating variable or the cooling water flow regulating variable between machine frames is subjected to online optimization through a quadratic programming optimization algorithm, and the deviation between a calculated value and a target value of the finish rolling temperature is reduced. The method comprises the steps that a plurality of control points are generated on the strip steel in the length direction according to a control period; the deviation between the calculated value and the measured value of the finish rolling temperature of all the control points is calculated according to information of all the control points and the measured value of a pyrometer at a precision rolling outlet; a temperature calculating model is corrected according to the deviation, and the calculation precision is improved, at the same time, the deviation between the calculated value and the target value of the finish rolling temperature of all the control points is calculated; and according to the deviation value between the temperature calculated value and the target value, the second flow regulating variable or the cooling water flow regulating variable between the machine frames of all the control points is subjected to online optimization through the quadratic programming optimization algorithm, and the finish rolling temperatures of all the control points are made to meet the control requirements. By means of the method, the control precision of the finish rolling temperature of the strip steel is improved, the uniformity of the total-length temperature of the strip steel is guaranteed, and the finished product quality requirements are met.

The invention discloses a constant-temperature control device for CCDs (charge coupled devices) of a spaceflight optical remote sensor. The constant-temperature control device comprises a micro heat pipe, the CCDs, a thin-film electric heater, a switching plate, a conventional heat pipe, a heat dissipation plate and a control circuit, wherein when the CCDs are switched off, the control circuit controls the thin-film electric heater to heat the micro heat pipe; the micro heat pipe simultaneously transmits generated heat to the CCDs and the heat dissipation plate; the heat dissipation plate dissipates redundant heat, so that the temperature of the CCDs can be kept constant; at the moment when the CCDs are switched on, the control circuit controls the thin-film electric heater to be powered off instantly, and redundant heat generated by the CCDs is dissipated by the heat dissipation plate, so that the temperature of the CCDs can be kept constant. According to the constant-temperature control device for the CCDs, power compensation is performed close to the CCDs, so that temperature fluctuation caused by temperature control delay and CCD power change can be avoided; therefore the temperature stability of the CCDs can be improved.

The invention relates to a device for simply and conveniently detecting performance parameters of an infrared imaging system, which comprises an infrared lens, a hollowed metal target, a temperature control chip, a temperature sensor and a shell, and is characterized in that the shell is a heat-insulated metal sleeve; the temperature control chip is positioned at one end of the heat-insulated metal sleeve, and the infrared lens is positioned at the other end of the heat-insulated metal sleeve; the hollowed metal target is arranged near the focal surface of the infrared lens in the heat-insulated metal sleeve through a target supporting device; the temperature sensor is arranged on the hollowed metal target; and a hollowed part of the hollowed metal target is positioned on a light path between the temperature control chip and the infrared lens. The device utilizes the imaging principle to simulate a distant target, meets the requirement of the operating distance of a thermal infrared imager, guarantees the temperature stability due to the shell with good heat-insulating property, reduces the environmental requirements under the condition of detection, effectively eliminates external interferences such as air circulation, heat conduction, heat radiation and the like, and reduces the space size of the thermal imager under the condition of detection. Moreover, the whole detection device has small volume and is convenient to operate and quick to detect.

The invention discloses a novel steam atomizer. The novel steam atomizer comprises an upper cover, a heating body and an ironing baseplate, wherein a heating pipe and a metal water pipe are arranged inside the heating body and are welded together; a secondary atomizing inlet, upper guide runners, a secondary atomizing outlet and a temperature controller and fuse installation position are formed at the top of the heating body; a metal water pipe connector is installed in the secondary atomizing inlet and is connected with one end of the metal water pipe by a connecting pipe; lower guide runners communicated with the secondary atomizing outlet are arranged at the bottom of the heating body and serve as tertiary atomization channels; steam outlets communicated with the lower guide runners are formed in the ironing baseplate; a steam ejection device is installed in the secondary atomizing outlet; temperature controllers and a fuse are installed on the temperature controller and fuse installation position on the heating body. The novel steam atomizer has the advantages that by adopting the structure, the scale on the surface of the heating body can be reduced and the scale covering the surface of the heating body can be removed more easily, thus prolonging the service life of the heating body; the novel steam atomizer has unique steam three-stage atomization technology.

The invention discloses a CPCR (convective polymerase chain reaction) amplification detection device based on chemical heating. The device comprises a chemical heating reactor, a thermal conduction module, a chemical heating pack, a thermal insulation casing, a CPCR tube and a paper strip detection chip; the thermal conduction module is heated by virtue of heat energy which is generated from a reaction between water and the chemical heating pack, so that the bottom of the CPCR reaction tube is heated, and the bottom of the CPCR tube is kept at 95+/-2 DEG C till the end of a CPCR amplification reaction; and after the reaction is finished, the CPCR tube is transferred to the paper strip detection chip and a detection result is judged and read by virtue of human eyes, so that detection is completed. According to the device provided by the invention, isothermal heating required by the CPCR amplification reaction is achieved by virtue of the heat energy generated from the chemical heating, and meanwhile, by judging and reading the detection result by virtue of the human eyes in the combination with paper strip detection, nucleic acid amplification and detection, without external electric power, can be achieve; therefore, a good foundation is laid for conducting accurate, convenient, rapid, low-cost and high-sensitivity disease diagnosis in such environments having no electric power or in lack of the electric power as field or outdoor environments, undeveloped or remote areas and the like.

The invention provides a high precision static magnetic field generating device for a nuclear magnetic resonance gyroscope. The device includes a coil support skeleton and a static magnetic field coil. Specifically, the coil support skeleton is cylindrical, and is internally equipped with an atom gas chamber and heating related structural parts, and the side wall of the coil support skeleton is provided with a plurality of symmetrically distributed annular winding grooves for fixing the static magnetic field coil. The static magnetic field coil consists of multiple groups of longitudinally symmetric circular coils, and the symmetric plane is a central cross section of the coil support skeleton, the coils are wound by one enamelled copper wire, and each group has the same number of windings. Through specific location distribution control, the high precision static magnetic field generating device provided by the invention can provide a high precision static magnetic field with extremely high uniformity for an area where the gas chamber of the nuclear magnetic resonance gyroscope is located. Compared with the prior art, the high precision static magnetic field generating device provided by the invention has the advantages of good magnetic field uniformity, more compact structure, easy installation and maintenance, and easy realization of engineering.

The invention discloses a large acceleration control method for ensuring the finish rolling temperature, and belongs to the field of temperature control in the rolling process. The control method aims to meet the control requirements of different types of steel, improve the production capacity of a rolling mill, shorten the production time and ensure the stability and the uniformity of finish rolling temperature. The control method comprises the steps that two points are generated in the length direction of strip steel; according to the information of the points, a finish rolling temperature calculation value and a speed calculation value of each point are calculated, and the sensitivity coefficients of the temperature/speed are calculated; the temperature deviation between the calculated values of the finish rolling temperature of the points and the target values when considering that cooling water between adjustable machine frames reaches the limit capacity are calculated, and the speed variable quantity required by the points to reach the target temperature are calculated by combining the sensitivity coefficients of the temperature/speed; iteration calculation is carried out repeatedly until the finish rolling temperature of the points approaches the target temperature; and finally the regional length of the large acceleration of the strip steel is obtained. The method has the advantages that the contradiction between finish rolling temperature control and rolling rhythm improvement can be solved, the production time can be shortened, and the production capacity of the rolling mill can be improved.

The invention discloses wide-temperature and low-loss soft ferrite. The wide-temperature and low-loss soft ferrite comprises the following raw materials in parts by weight: 100 parts of a main material, 0.56-0.78 part of an auxiliary material, 0.3-0.5 part of a surfactant, 0.1-0.2 part of a defoaming agent and 4-6 parts of a bonding agent, wherein the main material comprises the following raw materials according to a molar ratio: 0.6-0.7 part of SnO2, 12.5-13.3 parts of MnO, 33.2-33.8 parts of ZnO and 52.2-53.7 parts of Fe2O3; the auxiliary material comprises the following raw materials in parts by weight: 0.14-0.16 part of Co2O3, 0.06-0.07 part of Ta2O5, 0.2-0.3 part of CaCO3, 0.1-0.15 part of SiO2, 0.03-0.04 part of V2O5, 0.01-0.02 part of Li2CO3 and 0.02-0.04 part of ZrO2.

The invention discloses a hot bar roadbed for controlling seasonal frost damage, which comprises a water permeable layer, an impermeable layer, a roadbed and a hot bar; The roadbed, the impermeable layer and the permeable layer are laid from bottom to top in turn; The roadbed is provided with a hot bar mounting hole; The hot bar is arranged in the hot bar mounting hole; The hot rod is an airtighthollow structure, and the airtight hollow structure is provided with liquid ammonia. The invention provides a hot bar roadbed and a construction method for controlling seasonal frost damage, which isused for controlling and eliminating the generation and development of seasonal frost damage of roadbed, and ensuring the stability of roadbed and the safety of operation in low temperature season.

The invention discloses a multi-mode coupling miniature electric field sensing device based on a piezoelectric effect and a piezoresistive effect. The miniature electric field sensing device comprisesa horizontally placed semiconductor thin film, a horizontally placed substrate is arranged under the semiconductor thin film, a cavity structure is formed between the semiconductor thin film and thesubstrate through support of a middle interlayer, an upper surface of the semiconductor thin film is evenly provided with a piezoresistive material, the piezoresistive material comprises a transverse-transverse mode piezoelectric film and a transverse-longitudinal mode piezoelectric block, and in a transverse-transverse mode, a top surface of the semiconductor thin film is provided with the piezoelectric film; and in a transverse-longitudinal mode, a bottom surface of the semiconductor thin film is provided with the piezoelectric block. The multi-mode coupling miniature electric field sensingdevice based on the piezoelectric effect and the piezoresistive effect, provided by the invention, has the beneficial effects of being small in volume and highly integrated, effectively reducing circuit temperature drift, reducing zero drift, improving measurement accuracy, being capable of realizing electric field accurate measurement under wide band, high field intensity and complex environment,and also being capable of being mounted and maintained in the case of being electrified.

The invention provides a composite phase change flat plate heat pipe for a satellite. The composite phase change flat plate heat pipe comprises a cover plate, a uniform temperature plate, a phase change plate, a first capillary core, a second capillary core, a liquid working medium and a phase change material; the lower side of the cover plate is fixedly connected with the uniform temperature plate, a first sealing chamber is formed between the cover plate and the uniform temperature plate, the lower side of the uniform temperature plate is fixedly connected with the phase change plate, a second sealing chamber is formed between the uniform temperature plate and the phase change plate, the first capillary core is installed on the upper side of the first sealing chamber, the second capillary core is installed on the lower side of the first sealing chamber, the liquid working medium is added into the first sealing chamber, and the phase change material is added into the second sealing chamber. A uniform temperature layer and a phase change layer are welded into a whole, the thickness of the composite phase change flat plate heat pipe is reduced, meanwhile, light metal fins with high heat conductivity are used as a strengthening structure, the mechanical strength and the pressure bearing capacity of a shell are enhanced, meanwhile, the heat conductivity coefficient of the paraffin phase change material is increased, and the weight of a thermal control device is effectively reduced.

The invention discloses a low-temperature sintering temperature stabilization type zirconate microwave dielectric ceramic material, which comprises Li2Mg3ZrO6, CaZrO3 and ZrO2. The preparation methodcomprises: S1, weighing raw materials MgO, Li2CO3 and ZrO2, completely mixing the raw materials, agate balls and absolute ethanol, carrying out ball milling for 6-10 h, drying, and pre-firing to obtain Li2Mg3ZrO6 pre-fired powder; S2, weighing raw materials CaCO3 and TiO2, mixing the raw materials, agate balls and absolute ethanol, carrying out ball milling for 6-10 h, drying, and pre-firing to obtain CaTiO3 pre-fired powder; and S3, adding the Li2Mg3ZrO6 pre-fired powder obtained in the step S1, the CaTiO3 pre-fired powder obtained in the step S2, and LiF into a container, adding agate ballsand absolute ethanol, mixing, carrying out ball milling for 6-10 h, drying, adding a polyvinyl alcohol aqueous solution, granulating, sieving, forming a billet by a sheet pressing machine, and sintering to obtain the low-temperature sintering temperature stabilization type zirconate microwave dielectric ceramic. According to the present invention, the disadvantages of large resonance frequency temperature coefficient and high sintering temperature of the ceramic material are overcome, and the temperature stability of the material is ensured.

The invention relates to the technical field of plastic coating of compensation chains, and particularly discloses a production device of a plastic coated compensation chain. The production device comprises a traction mechanism, and a first-pass heating system, a second-pass heating system, an atomization cooling system, a water cooling system and an air cooling system which communicate with one another, wherein the compensation chain is sequentially treated through the first-pass heating system, the second-pass heating system, the atomization cooling system, the water cooling system and the air cooling system under traction of the traction mechanism; a plastic coating liquid tank is arranged between the first-pass heating system and the second-pass heating system; and the plastic coatingliquid tank is used for performing plastic sucking on the compensation chain. According to the production device, the structure is simple, arrangement is compact, maintenance is convenient, manufacturing cost is low, and production efficiency is high; the heating manner of the compensation chain is changed into electromagnetic heating, so that the heating speed is increased, and electric energy consumption is reduced; a drying oven adopts high-temperature resistant heating pipes, so that the space of an oven body is decreased, and stability of the temperature and the device is improved; and the atomization cooling system is additionally arranged, so that a quick cooling function is achieved, and the plastic coating cooling effect is improved.

The invention relates to a preparation method of Ba(0.9-x)Sr0.1MgxTiO3 temperature-stable lead-free ceramic. The preparation method comprises the following steps: uniformly mixing a SrTiO3 precursor solution and a BaTiO3 precursor solution, adding MgCl2 and mixing uniformly, and performing a hydrothermal reaction to obtain powder, wherein the molar ratio of SrTiO3, BaTiO3 and MgCl2 is a(0.9-x):0.1b:x; performing grinding, granulation and tableting forming of the obtained powder; and sintering at 1,200-1,300 DEG C to obtain Ba(0.9-x)Sr0.1MgxTiO3 temperature-stable lead-free ceramic. According to the preparation method provided by the invention, the Ba(0.9-x)Sr0.1MgxTiO3 temperature-stable lead-free ceramic is simple in chemical composition and meets the requirements of industrial production, the doping matters are simple and easily available, and the obtained powder is of pure phase so that the ceramic has relatively high dielectric constant and the temperature stability and uniform and dense grains are guaranteed.

The invention discloses a defoaming and heat insulation biological fermentation tank, which comprises a tank body, a stirring motor, a stirring shaft and a jacket. The bottom of the tank body is equipped with a tank bottom wall-scraping mechanism. The stirring shaft is equipped with a defoaming mechanism and a vertical wall-scraping mechanism. A thermal insulation coupling is mounted at the upperend of the stirring shaft. The defoaming and heat insulation biological fermentation tank utilizes the thermal insulation coupling to isolate a butt joint shaft and the stirring shaft, and a cylindrical heat insulation cotton layer is employed for heat preservation wrapping of a rectangular end at the upper end of the stirring shaft, thus effectively ensuring the temperature stability at the upperend of the stirring shaft and not transferring the ambient temperature directly to the fermentation liquid in the tank body. An annular floating drum, L-shaped defoaming rods and a vertical short rodcompose the defoaming mechanism, which can rise and fall along with the liquid level to destroy bubbles timely by the transverse rods of L-shaped defoaming rods and the vertical short rod.

The invention discloses an ethanol concentration device. The device comprises an evaporator; a condenser is mounted at the top end of the evaporator; a cooler is connected to the bottom end of the other side of the condenser; a water outlet is fixedly mounted at the bottom end of the cooler; a heater is connected to the bottom of the evaporator; a steam inflow pipe is fixedly mounted on the outerside of the top of the heater; and one side of the heater is connected with an alarm mechanism. According to the ethanol concentration device of the invention, under the action of the alarm mechanism,the temperature of the heater is monitored in the heater through a temperature sensing unit; and under the action of an expansion air bag, the expansion air bag begins to expand when the temperaturein the heater stably reaches 80 DEG C, so that the expansion air bag extrudes a movable plate; a connecting rod slides through a first sliding groove and a first sliding block, a pressing plate extrudes a pressing switch downwards; and under the electric connection effect of the pressing switch and an alarm lamp, the alarm lamp is powered on to warn a user, and the user can conveniently control the temperature of the heater in time.