14 results about "Constantan" patented technology

The invention discloses a lithium battery temperature acquisition and detection method, which comprises the following steps of: 1) replacing an original acquisition line (sheet) for acquiring the voltage of each monomer in an original battery pack (pack) with a copper / constantan double-core wire (bimetallic strip), welding an acquisition point on a monomer cell by adopting laser fusion welding or ultrasonic welding, and forming a standard T-shaped thermocouple at the welding point; after welding is completed, welding spots are isolated through epoxy resin or silica gel, and stability is guaranteed; 2) the copper wire (sheet) of the double-core wire can still be used for original single voltage acquisition signals, and functions of the copper wire (sheet) are kept unchanged; a constantan wire (sheet) is taken as a single cell temperature acquisition signal, and the temperature correction of a thermocouple formed on a cell utilizes a plurality of standing time periods in the production process of a battery pack (pack) and is completely corrected by a BMS (battery management system); and 3) repeatedly arranging a small number of NTC thermistors on key points in the battery and the thermocouples manufactured in the above mode for dynamic calibration and cold end temperature compensation of the thermocouples in the use process.

The utility model provides a quantitative radiation heat heating box which mainly comprises a box body, a radiation heat source, a heat flux meter, a heat screen and a driving device. A radiation chamber is arranged in the box body, and a radiation opening is formed in one side of the box body; the radiation heat source comprises a quartz heating pipe mounted in the radiation chamber; the heat flux meter is detachably installed on the outer side of the radiation opening and comprises a copper constantan thermocouple, a copper plate, a ceramic block and a fixing frame, the fixing frame is detachably connected with the box body, the ceramic block is fixedly installed on the fixing frame, the copper plate is fixedly installed on the ceramic block, and the copper constantan thermocouple is connected with the copper plate; the heat shield is provided with a heat insulation plate and a guide rod, one end of the guide rod is fixedly connected with the heat insulation plate, the other end is connected with the driving device, and the driving device drives the heat insulation plate to move to open or close the radiation opening. According to the utility model, the performance of the fire-fighting equipment in a high-temperature environment can be effectively evaluated and verified, and powerful technical support is provided for research and development and quality control of the fire-fighting equipment.

The invention discloses a T-shaped coaxial thermocouple preparation method and a T-shaped coaxial thermocouple, and the method comprises the steps: S1, enabling a constantan wire to be immersed in and pulled out of an insulating slurry for many times, so as to enable the insulating slurry to be uniformly attached to the surface of the constantan wire; s2, obtaining an insulating layer on the surface of the constantan wire through a preset curing mode; s3, depositing a copper film layer on the insulating layer; s4, a constantan wire is welded to the lower end face of the constantan wire, and electric conduction is formed between the copper wire and the copper thin film in a conductive adhesive bonding mode; and S5, removing the insulating layer formed on the upper end surface of the constantan wire, and coating the outer diameter edge of the constantan wire with a conductive adhesive to enable the constantan wire to be electrically conducted with the copper film, thereby obtaining the T-shaped coaxial thermocouple. According to the preparation method of the T-shaped coaxial thermocouple and the T-shaped coaxial thermocouple provided by the invention, a high transient heat flow sensor which can be used for a shock tunnel heat measurement test is realized by utilizing a relatively low-cost thermocouple material and a mature process, and the consistency and the accuracy of a heat measurement result of the sensor are improved.

The energy-saving photovoltaic curtain wall based on the Seebeck effect comprises a photovoltaic assembly, the photovoltaic assembly comprises a tempered glass layer, a photovoltaic battery piece layer, a photovoltaic back plate and a heat insulation and preservation plate which are sequentially arranged from outside to inside, the energy-saving photovoltaic curtain wall further comprises a mounting frame, and a copper-constantan thermocouple is arranged at the end, close to the heat insulation and preservation plate, of the photovoltaic back plate. A temperature sensor is arranged on the end face of the copper-constantan thermocouple, a copper positive plate of the copper-constantan thermocouple and a copper-nickel alloy negative plate are welded to form the copper-constantan thermocouple, a welding end forms a hot end and is tightly attached to a photovoltaic back plate, an unwelded part forms a cold end, the copper-constantan thermocouple is in a sheet shape, and the surface of the copper-constantan thermocouple is coated with a fluorocarbon weather-proof coating. Photovoltaic and thermoelectric power generation is achieved, the total power generation efficiency is remarkably improved, meanwhile, building energy consumption is reduced, pollutant emission is reduced, efficient energy utilization and building energy saving are achieved, and the effects of improving comprehensive energy output, optimizing the indoor thermal environment, saving energy and reducing emission are achieved.

The utility model relates to the technical field of fuses, and particularly discloses a multifunctional fuse, which comprises a packaging shell, a fuse packaged in the packaging shell, a slide rheostat and an electromagnet, the slide rheostat comprises a support, a polished rod, a resistance adjusting copper sheet, a constantan wire coil, a connector A and a connector B, wherein the connector A and the connector B are connected to the head end and the tail end of the constantan wire coil. According to the device, the fuse is connected with the slide rheostat in series, the surge current can be reduced by using the large resistance value of the slide rheostat at the starting moment of equipment, the surge current is well inhibited, the slide rheostat reduces the resistance value of the slide rheostat after the equipment is started, unnecessary power loss is reduced, and meanwhile the electromagnet loses power when the equipment is shut down. The resilience force of the spring drives the magnetic metal plate and the resistance adjusting copper sheet to integrally return to the initial position, manual resistance adjustment is not needed, and the automation effect is achieved.

The utility model relates to the technical field of thermal measurement, and specifically relates to a parallel partial electroplating thermopile integrated heat flow sensor, including module, the module includes bakelite support baseplate and constantan wire, copper wire and epoxy glue, the outside of bakelite support baseplate is wound with constantan wire and copper wire, the outside of constantan wire is covered with epoxy glue, the contact point between constantan wire and copper wire forms thermal junction, the constantan wire is covered area of epoxy glue and forms cold junction, three pieces are oppositely parallel to the module. Replace traditional manual welding with short side half-sealing electroplating process, and three hundred pairs of copper-constantan thermoelectric junctions can be generated in batches by single module, and the total thermoelectric junction reaches nine hundred pairs after three-module cascade, which significantly improves production efficiency and junction consistency, and solves the problem of uneven multi-module integrated thermal field by parallel three-stage direct connection topology and four-millimeter spacing design, and the output voltage is stable under the actual measurement of heat flow, the response time is short, and the high-precision rapid measurement demand is met.

This invention provides a low-resistivity constantan wire and its production process, relating to the field of copper wire processing technology. The invention includes a mounting platform with a winding roller on one side. The constantan wire to be processed is wound around the surface of the winding roller. A drawing die is located inside the mounting platform, through which the constantan wire passes. The internal opening of the drawing die gradually narrows, making the constantan wire thinner as it passes through the die. A wiping section is also located inside the mounting platform to wipe and lubricate the constantan wire. The production process employs a dual wiping and lubrication structure. The toothed ring of the wiping section drives a circumferential array of cleaning blades to rotate around the constantan wire. Combined with lubricating oil sprayed from a spray head, this achieves comprehensive wiping and uniform lubrication of impurities on the copper wire surface. A secondary wiping is performed by an adjustable wiping wheel, effectively removing oxide layers, dust, and other impurities from the copper wire surface, preventing scratches and breakage caused by surface uncleanliness or insufficient lubrication during the drawing process.

The application discloses a short-process preparation method of high-performance precise resistance alloy extremely thin foil and a preparation device thereof, and belongs to the technical field of non-ferrous metal material processing. The method comprises the following steps: placing constantan, Evan, Kama and other alloy raw materials in a cold crucible to perform suspension smelting, so that pure and uniform alloy melt is obtained; inert gas is filled into a smelting chamber in a sealed environment, the alloy melt is pressed out through a slit nozzle at the bottom of the crucible by using the gas pressure, a melt jet is formed, the melt jet is sprayed to the surface of a high-speed rotating cooling roller, and a crystalline thin strip with a thickness of 10-60 microns is formed by cooling and solidification; and precise cold rolling is performed to obtain constantan foil with a thickness of 3-10 microns. According to the application, high purification of the melt is realized through suspension smelting, the melt is accurately extruded through gas pressure driving and a slit nozzle, and a thin strip blank with uniform structure is obtained through rapid solidification, so that the process flow is significantly shortened, the material utilization rate and product quality are improved, and the application is suitable for the preparation of extremely thin foil in the fields of precise resistance and strain gauge.

The invention discloses a method for preparing a constantan alloy by vacuum melting, comprising the following steps: S1, weighing raw materials, S2, charging and preheating in a furnace, S3, vacuum melting, S4, casting, and S5, unmolding. The preparation method of the invention can effectively solve the problem of a large number of pores and defects in the ingot caused by the material being extremely easy to absorb air during the melting and casting process of the prior art, and can also effectively solve the processing defects existing in the ingot during subsequent processing. Impurity elements such as oxygen and sulfur can be reduced by a deoxidizer, thereby further improving the performance of the constantan alloy.

A bearing body is composed of an outer ring, a rolling body, a retainer, a sealing ring and an inner ring, a T-shaped thermocouple containing a copper wire, a constantan wire and a PVC insulating sleeve is embedded into the edge of the outer ring, and a gap of an embedded hole is filled with high-temperature-resistant glue for fixing. The device is assembled on an experiment table comprising a bottom plate, a rotor shaft, a bearing seat, a motor and the like, loads are applied through radial and axial loading devices, the motor drives the rotor shaft to rotate, and heat energy generated by friction between a rolling body and a raceway and a retainer is absorbed by a temperature measuring end of a thermocouple through heat conduction and convection to form a temperature difference with a cold end. The thermoelectric conversion effect is utilized to enable the copper wire and the constantan wire to generate potential difference, effective voltage is output through the booster circuit, and real-time monitoring parameters of the torque sensor, the temperature inspection instrument and the like are uploaded to a computer. Efficient recovery and self power supply of the working waste heat of the bearing are achieved, energy consumption is low, stability is high, and a feasible technical path is provided for intelligent upgrading of industrial equipment.

The invention discloses a preparation process of a nickel-chromium-copper strain constantan precision resistance alloy ultrathin foil. A preparation technology of a nickel-chromium-copper strain constantan precision resistance alloy ultrathin foil comprises the following steps that firstly, raw materials are prepared, specifically, the raw materials comprise, by mass, 1.5%-2.5% of Mn, 41.5%-45.5% of Ni, smaller than or equal to 0.20% of Fe, smaller than or equal to 0.05% of Co, smaller than or equal to 0.10% of Ti, smaller than or equal to 0.05% of Mg, smaller than or equal to 0.10% of Si and the balance Cu; step 2, cold rolling process cold rolling treatment; step 3, vacuum heat treatment; the vacuum annealing temperature is 460-580 DEG C, and the heat preservation time is 4 hours; step 4, material pouring; step 5, inspection; and step 6, packaging and shipping.

A liquid metal Seebeck coefficient measuring device and method based on combination potential method, using a T-shaped welded thermocouple to directly contact with liquid metal, forming good electrical contact, applying temperature difference through bottom cooling and upper heating, the cooling and heating mode is water bath temperature control, the liquid metal measuring section is placed in a constant temperature cover to control the temperature during the whole measuring process, using the method of common negative electrode to measure the thermoelectric potential and Seebeck potential of all thermocouples, the potential difference between the copper wire and the constantan wire of a thermocouple is the thermoelectric potential, the potential difference between the same materials of any two thermocouples is the Seebeck potential, without obtaining temperature difference, only measuring potential, a physical quantity, can calculate the Seebeck coefficient of the material.

The utility model relates to the technical field of wire drawing devices, and provides a wire drawing device for constantan alloy thermocouple wires, which comprises a wire drawing machine body, a supporting seat, a supporting column, a winding drum, a positioning mechanism and a rotating mechanism, the wire drawing machine body adopts a cone pulley type wire drawing machine, a supporting frame is mounted on the wire drawing machine body, and the supporting seat is fixedly arranged on the supporting frame. The supporting column penetrates through the supporting base and is rotationally arranged on the supporting base, a positioning ring is fixedly arranged on the supporting column, the supporting column is sleeved with the winding drum, the positioning mechanism is arranged on the supporting column and used for positioning the winding drum and the supporting column, and the rotating mechanism is arranged on the supporting base and used for driving the supporting column and the winding drum to rotate synchronously. According to the technical scheme, the problem that in the prior art, the winding drum on the wire drawing machine is low in mounting and dismounting efficiency is solved.

The present disclosure provides a resistor comprising a region of increased resistance, the increased resistance derived from an inclusion of a hybrid material, wherein the hybrid material comprises a base material and hybrid insulation, and wherein at least a portion of the hybrid insulation, whether layers or particulates, is oriented perpendicular to a current path through the resistor. The resistor may further comprise a series of pillars and traces integrated into semiconductor packaging. In some cases, the base material of the hybrid material may be selected from Constantan, a magnetic alloy, or copper. At least a portion of the hybrid insulation may be oriented parallel to the current path through the resistor to reduce eddy currents.