7results about How to "Sensitive to temperature changes" patented technology

The invention relates to the field of MOF-based flexible thermoelectric materials, and discloses n-type MOF-based high-performance thermoelectric foam with ductility and a preparation method and application thereof, and the method comprises the following steps: dissolving 1, 3, 5-trimesic acid and copper acetate in a mixed solution of N, N-dimethylformamide, ethanol and deionized water to prepare a precursor solution; soaking foamed nickel in the precursor solution for hydrothermal reaction, then taking out, cleaning and drying to obtain a foamed nickel material with nickel-copper MOF uniformly grown on the surface; and soaking the foamed nickel material in a mixed solution of polyaniline and DMF (Dimethyl Formamide) so as to graft a conductive polymer on the surface and pore channels of the nickel-copper MOF, thereby obtaining the high-performance thermoelectric foam with ductility. The n-type MOF-based thermoelectric foam prepared by the invention has excellent ductility and thermoelectric performance, and also has the characteristics of metal plasticity, efficient thermoelectric performance and sensitivity to temperature change. The excellent thermoelectric performance and wide application scene of the material are far better than those of the currently reported n-type MOF-based thermoelectric material.

The invention discloses fire-extinguishing flame-retardant temperature-sensitive hydrogel as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The flame retardant solution and the chitosan solution are mixed and stirred, then a polyethylene glycol solution is added, stirring continues, and chitosan colloid is obtained; adding a heat-sensitive agent, a cross-linking agent and an initiator into water, then adding the obtained mixed solution into the chitosan colloid, carrying out heating reaction, and then filtering to obtain the fire-extinguishing flame-retardant temperature-sensitive hydrogel. The hydrogel prepared by the invention has good thermosensitivity, forms a carbon layer at a high temperature, has dual effects of flame retardance and fire extinguishment, and is suitable for the fields of fire fighting, buildings, textiles, electronics and the like. The materials used for preparing the hydrogel are all biodegradable materials and are environmentally friendly; the preparation method is simple, easy to operate and suitable for large-scale production.

The utility model relates to the field of automobile safety products, disclose a lining pad and children's safety seat with ventilation module, including lining pad and install on lining pad ventilation module, lining pad is equipped with the contact area suitable for contacting with the back or waist or hip of children, and the non-contact area away from the contact area, ventilation module includes fan, air deflector, air inlet, electric control assembly and air outlet, air inlet is located in the contact area, air outlet is located in the non-contact area, electric control assembly and fan electricity are connected and drive fan work, fan inhales air from air inlet, air deflector is used for guiding the air blown by fan to air outlet to take away the heat of contact area, simultaneously avoid blowing directly the back or waist or hip of children, form the circulating wind effect of " air suction - air blowing " on lining pad, inhale air from the back of children, air outlet is obliquely upward from both sides, take away the heat while avoiding blowing directly the back of baby.

The present invention provides a low-temperature furnace body and a low-temperature dry body temperature calibrator including the low-temperature furnace body, the furnace body includes a furnace core and a cooling fan, the cooling fan is placed below the furnace core, the furnace core includes a foam insulation body, a thermostatic block arranged inside the foam insulation body and integrally foamed, a heat equalizing block installed in the thermostatic block, and a radiator and a cooling plate fixed on both sides of the foam insulation body, one side of the cooling plate is in contact with the thermostatic block, and the other side is in contact with the hot end of the radiator. The cross section of the thermostatic block in the furnace body of the present invention is set to an hourglass shape with wide ends and narrow in the middle, so that the thermostatic block is light in weight, small in heat capacity, and more sensitive to temperature changes, and the size of the cooling plate is also large, and the heat dissipation effect is good; the low-temperature dry body temperature calibrator of the present invention adopts a modular design, the furnace body structure layout is reasonable, the structure is compact, and the independent two air duct sealing design improves the stability of the furnace body and the temperature measurement accuracy, and is suitable for the temperature measurement of low-temperature devices under test.

This invention discloses a reusable diaphragm wall leakage detection device, comprising a detection tube disposed on the outside of the diaphragm wall, a heating device and a measuring device disposed inside the detection tube, the heating device being connected to an external temperature controller, and the measuring device being connected to an external fiber optic demodulator. Both the fiber optic demodulator and the temperature controller are connected to a leakage analysis host, which analyzes the fiber optic demodulator and provides signals to the temperature controller to adjust the heating device. The detection tube is placed by drilling holes on the outside of the diaphragm wall joint, eliminating the need to weld the detection device to the diaphragm wall reinforcement cage. The servo motor controls the opening and closing turntable and connecting rod to achieve deployment / retraction, allowing the sensor and heating band to be in close contact with the detection tube, resulting in more accurate detection and easier recycling, significantly saving costs. The temperature controller controls the heating band for nonlinear heating, maintaining a constant temperature of the groundwater around the detection device, making it more sensitive to temperature changes caused by leakage water and improving measurement accuracy.

This invention relates to the field of marine environmental monitoring technology, and discloses a temperature, salinity, and depth sensing system and demodulation method based on a polarization-maintaining fiber optic π-phase-shifting grating. The system includes a polarization-maintaining fiber and a π-phase-shifting fiber grating, with the π-phase-shifting fiber grating inscribed on the polarization-maintaining fiber and serving as a single sensing unit. The reflection spectrum of the sensing unit contains reflection peaks along both the fast and slow axes, with an ultra-narrow linewidth transmission window introduced by the π-phase shift at the center of each peak. A salinity-sensitive thin film is coated on the π-phase-shifting region of the sensing unit, covering the π-phase-shifting region and extending into a local area of ​​the π-phase-shifting fiber grating, but not covering the entire grating. By locally coating the salinity-sensitive thin film on the π-phase-shifting region of a single polarization-maintaining fiber optic π-phase-shifting grating, and simultaneously extracting the characteristic wavelength changes of its fast and slow axis reflection center wavelengths and transmission window wavelengths, a sensitivity matrix is ​​used to achieve synchronous decoupled measurement of the three parameters of temperature, salinity, and depth.

A temperature control device for liquid carbon dioxide storage comprises a temperature sensing device and a heat source control device. Wherein a conical shell with a narrow upper part and a wide lower part is arranged in the temperature sensing device, liquid carbon dioxide with the pressure equal to that of a storage tank is stored in the temperature sensing device, 24 bulges beneficial to heat transfer are designed to ensure that the internal temperature and the external temperature are close, a piston with good conductivity is arranged at the upper part, and connected conductors are controlled through different height positions of the piston; and the temperature adjusting device and the alarm device are further controlled. The device completely meets the temperature control standard of the storage and transportation link, ensures the safety and reliability of temperature regulation of the carbon dioxide storage tank, effectively solves the problem of temperature early warning control of liquid carbon dioxide in the storage and transportation process, and has the characteristics of convenience in operation, high durability, low cost and the like.