62 results about "Point heat source" patented technology

The invention discloses an artificial graphite film heat conduction and heat dissipation material with a composite structure and a preparation method of the artificial graphite film heat conduction and heat dissipation material with the composite structure. The artificial graphite film heat conduction and heat dissipation material with the composite structure comprises a heat conduction layer A and a single-sided or double-sided heat dissipation layer B, wherein the heat dissipation layer is directly combined with the heat conduction layer or is combined with the heat conduction layer through combining a transition layer C; the composite structure of the heat dissipation material is an AB type, an ACB type, an ABA type, an ACBCA type or an ACBA type; the heat conduction layer has a relatively high heat conduction coefficient and a point heat source subjected to heat dissipation is dispersed into a surface heat source; and the heat dissipation layer has a relatively high black-body radiation coefficient and has relatively high absorption capacity on heat of the heat source and relatively high outward thermal radiation capacity. The preparation method of the artificial graphite film heat conduction and heat dissipation material with the composite structure comprises the following steps of (1) obtaining the heat conduction layer or a heat conduction layer precursor; (2) uniformly coating a single side or double sides of the heat conduction layer or the heat conduction layer precursor with heat dissipation layer slurry and drying to form the heat dissipation layer; and (3) carrying out calendaring to obtain the artificial graphite film heat conduction and heat dissipation material with the composite structure.

The invention discloses a heat source recognition device, an unmanned aerial vehicle and a heat source recognition method. The device comprises an infrared imaging unit which is used for obtaining aninfrared image of a heat source under a first focal length, a proportion calculation unit which is used for calculating the proportion of the heat source in the infrared image so as to determine the size of the heat source, a visible light imaging unit which is used for acquiring a visible light image of the heat source under a second focal length according to the size of the heat source and the distance information of the heat source, and a recognition unit which is used for judging whether the heat source is a fire point according to the visible light image. The heat source is discovered through infrared imaging, the visible light imaging unit further adjusts the focal length according to the size of the heat source so as to obtain the visible light image, and whether the heat source isa fire point is judged through the visible light image, so that interference of a non-fire-point heat source on infrared detection can be eliminated, and the problems of false alarm rate and high missing report rate are reduced.

The invention discloses a bending point heat source combined shaping method, comprising the steps of: 1). making simulated machining on blanks by computer platform and prejudging local region difficult to shape; 2).by step 1), obtaining point heat source machining parameters; 3). As machining, controlling point heat source for combined machining by computer control system according to the parameters in step 2); 4). during machining in step 3), blank state sensor feeds stress, strain and other real-time monitored data back to the control system. And it can overcome the defect of possibly damaging shaped pieces, even destroying them.

The invention discloses a measuring probe of soil thermal resistivity based on a point heat source method, which is in a spheroidal structure and is composed of a hollow metallic spherical shell, an insulated heat-conducting filler, an electric heating appliance and a temperature thermocouple, wherein the metallic spherical shell is provided with a round hole and a strip groove gap; the electric heating appliance is positioned at the center of the metallic ball; the temperature thermocouple probe is arranged in the strip groove gap of the surface of the metallic ball; the inside of the metallic spherical shell is filled with the insulated heat-conducting filler; the electric heating appliance is sealed and positioned through the insulated heat-conducting filler; and the temperature thermocouple probe and the metallic spherical shell are filled with insulation heat conducting filler silicon. The probe can be used for sampling measuring in a laboratory, can directly measure the soil thermal resistivity on site under the condition of not damaging the soil structure, is in particular suitable for the measurement of the soil thermal resistivity in the burying depth range of the facilities such as power cables, heat distribution pipelines and the like.

The invention discloses a vapor chamber radiator. The radiator comprises a radiator main body, a liquid absorption core, radiating fins and a cold liquid working medium, the radiator main body comprises a vapor chamber shell and a vapor chamber cover plate, the vapor chamber cover plate is fixedly connected to the side surface of the vapor chamber shell, and the radiating fins are fixedly connected to the outer part of the radiator main body; and the cold liquid working medium and the liquid absorption core are arranged in the radiator main body. According to the vapor chamber plate radiator, the radiator is manufactured on the basis of the vapor chamber plate, so the problem that a traditional radiator is low in heat conduction coefficient is well solved; a substrate of a common profile radiator is replaced with a uniform temperature plate structure to improve the heat conduction performance of the substrate of the profile radiator, a single-point heat source relatively concentrated by diodes is rapidly conducted and distributed to the side surface of a substrate, and then the heat is dissipated in a natural heat dissipation mode of heat dissipation tooth pieces, so that the heat conductivity coefficient of the radiator in use is greatly improved, the overall structure is simple, and the radiator is relatively practical in use.