Temperature coefficient accurate setting electric resistor and manufacture thereof

The invention relates to a resistor for precisely setting temperature coefficient and a manufacturing method thereof. The invention selects the thick film resistance serum with two temperature coefficients to manufacture a target thick film resistance. The temperature coefficients of two kinds of thick film resistance serum are taken at two sides of the temperature coefficient of the target thickfilm resistance. Furthermore, the resistance value of the target thick film resistance is the sum of the resistance values of two thick film resistances, and the resistance values of two thick film resistances are determined according to a formula. Two thick film resistances are precisely modified to correct the resistance values so that the temperature coefficient error of the target resistance isreduced to about 1 percent from the error about 12.5 percent in the prior art.

The aging seat device is suitable for needle-shaped terminal power semiconductor device

The utility model relates to an aging seat device suitable for a needle-shaped terminal power semiconductor device. The device comprises an aging plate, the aging plate is provided with a plurality of insulating support positioning seats which can be matched with a power semiconductor device, the insulating support positioning seats are internally provided with a plurality of terminal positioning connecting holes which penetrate through the insulating support positioning seats, and each terminal positioning connecting hole is internally provided with a probe elastic connecting body which is electrically connected with the aging plate; when the power semiconductor device is assembled on the insulating support positioning seat, the needle-shaped terminal of the power semiconductor device can extend into the terminal positioning connecting hole of the insulating support positioning seat, and the needle-shaped terminal of the power semiconductor device can be electrically connected with the ...

Medicine grinding device for chemical development of natural medicine

The invention discloses a medicine grinding device for chemical development of natural medicines, and relates to the technical field of medicine development, the medicine grinding device comprises a bottom plate, the upper end of the bottom plate is fixedly connected with a shell, and the shell is movably connected with the front and rear sides of two rotating shafts I through two circular holes formed in the front and rear sides of the shell. According to the medicine crushing device, a first motor, a first rotating shaft, a first belt wheel and a first transmission roller are matched with one another, so that a first conveying belt can be driven to rotate, medicine can be automatically conveyed to the position between the two crushing rollers, preliminary crushing operation of the medicine is facilitated, meanwhile, the danger caused by manual feeding of operators is avoided, and the working efficiency is improved. And through mutual cooperation of an air blower, an air blowing pipe, ...

Device capable of detecting multi-topology unit power semiconductor device

The utility model relates to a device capable of detecting a power semiconductor device with multiple topological units. The device comprises an element carrying disc capable of supporting and positioning the power semiconductor device and a carrying disc lifting driving mechanism capable of driving the element carrying disc to lift. Wherein an adaptive plate is arranged above the element carrier disc, a connector which can be in adaptive connection with a power semiconductor device is arranged on the adaptive plate, the adaptive plate can translate above the element carrier disc, and after the adaptive plate translates on the element carrier disc, the connector on the adaptive plate can be aligned with a corresponding topological unit on the power semiconductor device. And after the element carrier disc is driven to ascend by the carrier disc lifting mechanism, the connector on the adapter plate can be electrically connected with the corresponding topological unit on the power semiconductor ...

Halophilous bacillus with soil improvement effect as well as screening method and application of halophilous bacillus

The invention discloses halophilous bacillus with a soil improvement effect, a screening method and application thereof, the halophilous bacillus is named as NBL-BS214, the strain is preserved in China Center for Type Culture Collection on September 20, 2022, and the preservation number is CCTCC NO: 20221370. The halophilous bacillus NBL-BS214 is high in environmental adaptability, has certain tolerance to salinity, PH and petroleum, is suitable for growth when the concentration of sodium chloride is 5%-15%, and can be applied to the field of soil improvement, and the application of the halophilous bacillus NBL-BS214 and the application of the halophilous bacillus NBL-BS214. The optimum salt content is 15%; the growth PH range is 4-11, and the optimum PH is 7; the halophilous bacillus NBL-BS214 can grow when the content of diesel oil is within 15%, the halophilous bacillus NBL-BS214 can grow most suitably when the adding amount is 1%, the halophilous bacillus NBL-BS214 has the highest content ...

Truss damping device

The invention provides a truss damping device and belongs to the technical field of building construction.The truss damping device is provided with a shear frame, damping springs and a damping device, the shear frame is arranged in the middle of a truss, the two sides of the shear frame are fixedly connected with the adjacent truss through screws, the damping springs are arranged in the shear frame, and the damping springs are arranged in the damping device. The shear frame and the damping spring are used for damping the truss in a large range to prevent violent vibration of the truss; damping devices are arranged in the shear frame and spaced from the damping springs, and the damping devices are used for further damping the shear frame for the truss, so that the safety of the truss is improved; one end of the damping device is fixed to the top of the shear frame, and the other end of the damping device is fixed to the truss. The truss damping mechanism can solve the problems that an existing ...

Vehicle suspension device and installation device's axle

The utility model relates to a vehicle suspension device, including lift kits, swing arm support and spring, lift kits be domes, vault, first support arm and second support arm have, first support armbe good at the second support arm, the end of first support arm is provided with the notch, the both sides of notch are provided with the pinhole, the end of second support arm is provided with spring bracket, swing arm support one end be provided with the pinhole, one end is provided with down spring bracket, swing arm support's pinhole end is installed in the notch of first support arm and is passed through pivort fixation, under with the spring bracket at last spring bracket is installed respectively at the both ends of spring. Utility model structure is simple, and the shock attenuation is effectual, has solved the vehicle in the unstable problem of farm work left and right rocking pendulum.

Metal case marking paint removal method

The invention is applicable to the field of chemical industry, and provides a metal case marking paint removal method which comprises the following steps: coating a marking paint with a hardening agent, curing the marking paint to obtain a marking paint curing film layer; and stripping the marking paint curing film layer; wherein the curing processing method is as follows: in the condition of 90 +/-5 DEG C, performing dry processing for 60 +/-5 minutes; the metal case marking paint removal method does not damage a metal case, can clearly remove the marking paint, and is simple.

Temperature coefficient accurate setting electric resistor and manufacture thereof

The invention relates to a resistor for precisely setting temperature coefficient and a manufacturing method thereof. The invention selects the thick film resistance serum with two temperature coefficients to manufacture a target thick film resistance. The temperature coefficients of two kinds of thick film resistance serum are taken at two sides of the temperature coefficient of the target thick film resistance. Furthermore, the resistance value of the target thick film resistance is the sum of the resistance values of two thick film resistances, and the resistance values of two thick film resistances are determined according to a formula. Two thick film resistances are precisely modified to correct the resistance values so that the temperature coefficient error of the target resistance is reduced to about 1 percent from the error about 12.5 percent in the prior art.

Voltage-controlled oscillator voltage compensation circuit

This invention belongs to the circuit filed and provides a voltage-controlled oscillator voltage complementary circuit. A precise reference work voltage is provided for the voltage controlled oscillator voltage compensation circuit through a precise reference voltage stabilizing diode, resistance of a voltage regulation module is controlled to vary as temperature changes, voltage at a voltage output end of the voltage regulation module is further controlled to vary as temperature changes, a voltage that varies as the temperature varies is output to the voltage controlled oscillator for voltage compensation, so that the voltage controlled oscillator can maintain stable output frequency when the temperature changes. As a result, problems that the voltage controlled oscillator has large changes in frequency when the temperature varies under control of a fixed work voltage, the debugging is difficult, and device parameters are inconsistent are solved.

Power resistor capable of temperature measurement and production method

The invention discloses a power resistor which can measure temperatures and a manufacturing method. The power resistor comprises a ceramic substrate, a power resistor film and a power resistor termination conductor membrane; both the two ends of the power resistor film are connected with the power resistor termination conductor membrane; particularly, the power resistor further comprises a temperature sensitive resistor film and a temperature sensitive resistor termination conductor membrane; and both the two ends of the temperature sensitive resistor film are connected with the temperature sensitive resistor termination conductor membrane. The power resistor can instantly perceive self temperature changes, so that corresponding protection is conducted in time through the measurement or the control of a matching circuit. The power resistor and a temperature sensitive resistor are manufactured into an integrated device which has the advantages of fast reaction, small volume, low cost, easy ...

Method for digital multi-purpose meter on-line measurement for loop resistance value and the converter

The invention relates to a method for online measurement resistance of loop resistor by using a digital universal instrument and a converter. The method comprises the following steps of: determining points B and C to be detected on both ends of a resistor to be measured, setting a resistor connected with the resistor to be measured as the protection resistor, setting the other end of the protection resistor R1 connected with a resistor in other loop as the point A to be detected, respectively connecting a detection terminal A, a detection terminal B and a detection terminal C of a loop resistance measurement converter with the point A, the point B and the point C, and connecting the positive and the negative test pens of the digital universal instrument to measure the resistance of the resistor R2 to be measured. The resistance measured by the invention without disconnecting the loop has the same accuracy as the resistance directly measured by the digital universal instrument in the disconnected ...

Film forming technology used for thick film hybrid integrated circuit

The invention is suitable for the technical field of integrated circuits, and relates to a film forming technology used for a thick film hybrid integrated circuit. The film forming technology includes: printing a silver conductor paste on the surface of an inorganic substrate, and drying; printing a gold conductor paste on the dried silver conductor paste, and drying; and performing sintering processing on the inorganic substrate. The film forming technology overcomes the defect in the prior art that a silver conductor and a gold conductor cannot be well fused and a film is easy to fall, improves the bonding strength of the silver conductor and the gold conductor, and enhances adhesive force in a lap joint of the silver conductor and the gold conductor.

Processing method of imitation copper aluminum plate

The invention provides a processing method of a copper-imitated aluminum plate, which belongs to the technical field of building materials, and comprises the following steps: smelting an aluminum alloy ingot; carrying out homogenization heat treatment on the aluminum alloy ingot; the aluminum alloy ingot is subjected to hot rolling treatment, and an aluminum alloy rolled plate is obtained; the aluminum alloy rolled plate is subjected to cold rolling treatment; the aluminum alloy rolled plate is subjected to annealing treatment; the aluminum alloy rolled plate is subjected to cold rolling treatment again; a positioner is used for calibrating the required size of the aluminum alloy rolled plate; a cutting machine is used for cutting the aluminum alloy rolled plate according to the line calibrated by the positioner; the method comprises the following steps: spraying copper-imitated fluorocarbon paint on the surface of an aluminum alloy rolled plate by using an electrostatic spraying machine ...

Automobile motion visualization method and system, electronic equipment and storage medium

The invention discloses an automobile motion visualization method and system, an electronic device, a storage medium and a terminal. The method comprises the following steps: constructing a virtual scene environment based on an unreal engine; processing the whole vehicle data through virtual reality software; based on the virtual scene environment and the processed whole vehicle data, generating vehicle driving visual data through three-dimensional animation software; based on the virtual scene environment and the vehicle driving visualization data, generating a vehicle visualization material through an unreal engine; and based on the vehicle visual material, optimizing the material through a digital media processor to generate a vehicle motion visual video. By means of the method, driving visualization of the automobile in the virtual scene can be achieved, meanwhile, it is guaranteed that the local detail effect of the automobile and the scene is controllable, and therefore the whole ...

Double-frequency micro-strip antenna adopting multilayer structure

The invention discloses a double-frequency micro-strip antenna adopting a multilayer structure. The double-frequency micro-strip antenna comprises upper layer micro-strip antenna bodies, a lower layer micro-strip antenna body, a feed metal micro-strip line and a feed port. The lower layer micro-strip antenna body comprises a common metal ground plane and a lower layer micro-strip antenna base plate. A large first rectangular gap and a small second rectangular gap are formed in the common metal ground plane. The feed micro-strip line is located on the reverse side of the lower layer micro-strip antenna base plate. The upper layer micro-strip antenna bodies are stacked on the common metal ground plane and conduct coupling feed through the small gap in the common metal ground plane and the feed metal micro-strip line. Radiating elements of the upper layer micro-strip antenna bodies are square metal sheets which form an inverted angle at the diagonal positions. The large gap of the lower layer ...

Multi -functional field management vehicle

The utility model relates to a multi -functional field management vehicle, including installing the axle on the frame, install the wheel in the axle both sides, install and start machinery room and cockpit on the frame, the frame on still the installation transfer case of an input and three output has to and has a gearbox of an input two outputs around with, start install the engine in the machinery room, the output of engine passes through the one end that middle transmission axle assembly is connected to the belt, transfer case and gearbox are connected simultaneously to the other end of middle transmission axle assembly, the three output of transfer case, wherein: a port can drive the hydraulic pump, and then drive hydraulic system, and two other ports can drive other agriculture accessory, if the quick -witted spray pump of laxative, fertilizer distributor etc. The utility model discloses simple structure can solve the single problem of field management vehicle usage to and realizethe ...

Transfer case of field management vehicle

The utility model relates to a transfer case of field management vehicle, including transfer case housing and control rod, the transfer case main shaft runs through transfer case housing, spline movable mounting main shaft gear is passed through to the part of transfer case main shaft in transfer case housing, shift fork one end suit is and main shaft gear fixed connection on the transfer case main shaft, the other end and the smooth epaxial slider of shift fork are connected, the slide -bar is fixed on transfer case housing, the slider is connected with the control rod of movable mounting ontransfer case housing, the both sides first countershaft of installation and the second layshaft of the inherent transfer case main shaft of transfer case housing, first countershaft and second layshaft's output stretches out transfer case housing, the first gear of fixed mounting on the first countershaft, the last fixed mounting second gear of second layshaft, first gear and second gear misplacein ...

Fire control power cross box and install motorcycle of this cross box for motorcycle

The utility model discloses a fire control power cross box and install motorcycle of this cross box for motorcycle, this fire control motorcycle include automobile body, fire -fighting water pump, support, cross box, first toolbox and second toolbox, and fire -fighting water pump installs in the bottom of automobile body, adopts embedded installation, and the left front side at the automobile body is installed to the cross box, and the support mounting is in the below of cross box, and the afterbody at the automobile body is installed in first toolbox, and the second toolbox has two, installs the left and right sides at the automobile body respectively. This power cross box utilizes gear transmission power, and stability is strong, power transmission is efficient, the vibration is little. This power cross box can make the power of motorcycle realize the quick switching between fire -fighting water pump and motor wheel to the motorcycle of installing this power cross box possess the basic ...

Microscope supporting mechanism for boiler tube

The utility model provides a microscope supporting mechanism for boiler tube, including magnet steel no. 1, the joint connector, and a support, the connecting axle, the support, magnet steel no. 2, the adapter sleeve, support the cover, sponge ring, spiral shell rasp bar and splint, two assemblies of magnet steel are at the under a microscope terminal surface, and two laminatings of magnet steel are in boiler tube annular side upper end, the support is connected with the support through the connecting axle, install the joint connector on the support, magnet steel no. 2 is installed at the support lower extreme, and two laminatings of magnet steel are in boiler tube annular side, this design has realized being become the mesh of 4 supports by 2 supports, the adapter sleeve assembly is in the microscope upper end, it fixes at the adapter sleeve up end to support the cover, sponge ring fixes and is supporting the cover upper end, spiral shell rasp bar assembly left end to the side of theadapter ...

Method for digital multi-purpose meter on-line measurement for loop resistance value and the converter