140results about "Other resistor networks" patented technology

The invention discloses an umbrella skirt used for a lightning arrester and an insulator and having a passive deicing function and a preparation method thereof.The umbrella skirt used for the lightning arrester and the insulator and having the passive deicing function comprises solid mixed silicone rubber and silicone rubber wrapping the outer surface of the solid mixed silicone rubber and having the passive deicing function; the silicone rubber with the passive deicing function comprises the following components: a silicone rubber-based material, a soft substance with low shear modulus and an inorganic filler, the adhesive force between the silicone rubber and ice is low (less than 100 kPa), the interface of the silicone rubber and the ice is very easy to separate due to stress concentration, and the passive deicing effect is achieved; the deicing function of the silicone rubber has a volume characteristic, cannot be lost due to damage to the surface of a material, has the service life equal to the service life of the material, and has a wide application prospect in the field of icing prevention and control.

The invention relates to the technical field of intelligent resistor control, and discloses a self-adaptive temperature compensation intelligent resistor system and a control method, and the system comprises a sensor module, a temperature compensation module, a self-adaptive control module, an electromagnetic shielding structure and a power management module. By applying an advanced temperature compensation algorithm, a reasonable electromagnetic shielding design, an intelligent self-adaptive control strategy and a perfect self-diagnosis function, the stability problem caused by the fact that a traditional resistance system is affected by environmental interference and element aging is effectively solved. According to the system, the resistance drift can be controlled to be + / -0.05% within the temperature range of-40 DEG C to 125 DEG C; in the aspect of electromagnetic interference suppression, the signal-to-noise ratio can be increased by 30dB; and the element aging compensation rate exceeds 90%.

An apparatus is provided. The apparatus includes a first resistor stack having a first temperature coefficient. The apparatus also includes a second resistor stack coupled to the first resistor stack having a second temperature coefficient different than the first temperature coefficient. The apparatus further includes a measurement circuit associated configured to determine a temperature of the apparatus based on a differential between a first voltage across the first resistor stack and a second voltage across the second resistor stack and determine a set of resistances of a field-effect transistor (FET) that is coupled to the apparatus based on additional differentials between additional voltages across the first resistor stack and the second resistor stack.

The invention relates to the technical field of rail transit vehicle power supply protection, in particular to a vehicle-mounted lightning arrester which comprises a body, a base, a sealing cavity, a flow guide passage and a restraint mechanism, and when pressure in the sealing cavity reaches the opening condition of a pressure relief opening and under the action of directional jet flow formed by a jet opening, the body is separated from a limiting piece; and the rotating shaft rotates towards the off-position direction around the rotating supporting part. According to the application, destructive voltage breakdown is taken as an action power source, gas is generated and rapidly expanded due to electric arc during breakdown of the sealing cavity in the body, after the cavity pressure rises to a set threshold value, the pressure relief opening with the pressure opening characteristic is selectively opened, and expanded gas is directionally discharged from the spraying opening along the flow guide passage; the offset of the spraying port relative to the rotary supporting part converts the spraying momentum into a dumping moment to the body, so that the body is quickly and certainly switched to the off position from the working position under the condition of no additional operation, the electric connection interruption with the high-voltage conductor is formed, and the risk of secondary pressurization of the reclosing is reduced.

The application provides a double-row lead frame resistance. The double-row lead frame resistance comprises a lead frame, a resistance, and the two ends of the first coil and the second coil are respectively installed with the lead wires; a protective cover; a cooling mechanism, the inside of the protective cover is fixedly connected with the supporting rod, the bottom end of the supporting rod is installed with the air bag; the top end of the supporting rod is internally installed with the fixed block and the fixed frame, the inside of the fixed block is slidably connected with the piston, the inside of the piston and the fixed block is respectively installed with the magnetic ring, the magnetic rings are attracted to each other; the inside of the fixed frame is slidably connected with the sliding rod, the sliding rod is fixedly connected with the piston, the side wall of the sliding rod is sleeved with the spring, and the two ends of the spring are respectively connected with the fixed frame and the piston; a cooling mechanism; a connecting mechanism. The double-row lead frame resistance provided by the application has the advantages of eliminating the self-induction of the coil, reducing the eddy current, and facilitating the dissipation of the heat inside the coil.

The application relates to an overcurrent-preventing resistor, which comprises a shell and a resistance coil, the bottom of the shell is internally provided with a bobbin and externally provided with a first pin and a second pin, the resistance coil is electrically connected to the first pin and the second pin, the resistance coil is sleeved on the bobbin and electrically insulated from the bobbin, the bobbin is internally provided with a magnetic piece, the magnetic piece is in sliding connection with the bobbin, the magnetic poles of the magnetic piece are distributed along the axis of the bobbin, the magnetic piece is electrically connected with the bobbin, the top of the inside of the shell is provided with an electric contact opposite to the bobbin, the top of the outside of the shell is provided with an indicating lamp electrically connected with the electric contact, and the inside of the shell is provided with a wire for electrically connecting the second pin. The application has the functions of quickly determining overcurrent in a laboratory and giving a warning.

The utility model discloses a thermal protection type piezoresistor which comprises a piezoresistor body, the two sides of the piezoresistor body are electrically connected with a first wire pin and a second wire pin respectively, and one side of the piezoresistor body is further connected with a third wire pin. The third lead pin is electrically connected with the second lead pin through a thermal fuse, and the thermal fuse is of a tubular structure. According to the thermal protection type piezoresistor, compared with a hard shell design, the overall size and the shell cost are reduced; and compared with an explosion-proof coating design, the risk that the coating bursts after the thermal fuse is subjected to high-temperature hot melting is avoided.

The utility model provides an electronic device capable of adjusting resistance, which belongs to the technical field of rheostats and comprises two mounting seats and a plurality of wiring components arranged on the mounting seats, and mounting sleeves are mounted on the outer walls of one sides of the mounting seats. According to the utility model, the lamp bead arranged on the wiring assembly is conducted when the position is wired, the path of current is judged by judging the lightening position of the lamp bead, meanwhile, when the sliding block is moved to adjust the resistance value of the resistor, the change of the resistance value can be intuitively reflected through the brightness of the lamp bead, and meanwhile, the direction of the current can be judged; according to the utility model, students can intuitively judge the current direction when the slide rheostat demonstrates and the current change when the slide rheostat changes, the teaching efficiency is improved, the arranged sliding sleeve is matched with the positioning sleeve to protect and fix the wire clamp in the process of conducting the lamp bead by wiring, the wire clamp connection position is prevented from loosening in the demonstration process, and the teaching quality is improved. Therefore, the stability of the demonstration process is improved.

The invention provides a lightning arrester core fixed based on an insulating rod and an assembly method thereof, which are used for solving various problems of a traditional metal oxide lightning arrester core. According to the lightning arrester core body fixed based on the insulating rods, the first groove and the second groove are matched and clamped with the Y-shaped clamping heads at the two ends of the insulating rods, and the core body is fixed through the plurality of insulating rods, so that the additional arrangement of structures such as an insulating cylinder is avoided, and the volume of the lightning arrester core body is reduced; meanwhile, the axial displacement of the insulating rod in the assembling and using processes is effectively avoided, so that the close contact among a plurality of resistor discs is ensured; compared with the prior art, the resistor discs pressed in a Y-shaped clamping mode are higher in stability, the plurality of resistor discs are in closer contact and do not generate gaps, and when the outer sides of the resistor discs are directly wrapped with the rubber jackets, rubber is not prone to permeating into the space between every two adjacent resistor discs.

The invention relates to the technical field of lightning arresters, and discloses a vehicle direct current lightning arrester with a built-in separation device, the vehicle direct current lightning arrester comprises an outer sleeve and a core body, the core body comprises an insulating tube, an electrode is arranged in the insulating tube, the electrode divides the interior of the insulating tube into an upper cavity and a lower cavity, the upper cavity is provided with a functional module, the functional module is used for realizing an overvoltage protection function, and the lower cavity is provided with a power supply. A separating device is arranged in the lower cavity and located on the upper portion of the lower cavity, a connecting hole communicated with the lower cavity is formed in the core body, a grounding end is arranged in the connecting hole, and the grounding end is connected with the separating device; according to the lightning arrester, when the insulating property of the upper cavity is completely lost due to a short-circuit fault, the accurate and reliable action of the separating device of the lower cavity can still be ensured when the fault occurs, the disconnection of a circuit is realized, the insulating property of the lower cavity can be kept after the action, and the risk of a secondary fault is avoided; as the disengagement device is limited in the lightning arrester, the adverse effect of scattered objects generated when the external disengagement device acts on the vehicle can be avoided.

To miniaturize a plane shape of a strain gauge having four resistance parts constituting a Wheatstone bridge circuit.SOLUTION: A strain gauge includes a resin flexible base material, and a resistor, wherein the resistor includes a first functional layer formed from metal, an alloy or a metallic compound directly on one surface of the base material, a first resistance part and a second resistance part which are formed from a film containing Cr, CrN and Cr2N and contain α-Cr as a main component, directly on one surface of the first functional layer, a second functional layer formed from metal, an alloy or a metallic compound directly on the other surface of the base material, and a third resistance part and a fourth resistance part which are formed from a film containing Cr, CrN and Cr2N and contain α-Cr as a main component, directly on one surface of the second functional layer, wherein the first functional layer and the second functional layer have a function for promoting crystal growth of α-Cr and film-forming the film containing α-Cr as a main component, and the first resistance part, the second resistance part, the third resistance part and the fourth resistance part constitute a Wheatstone bridge circuit.SELECTED DRAWING: Figure 3

A high-power direct-current load cooling method based on variable modular combination comprises the steps that a high-power load is divided into a plurality of resistor modules, resistor load bodies of the resistor modules are sealed and then placed in an independent cooling water tank, and then the independent cooling water tank is placed on a supporting frame in an overall resistor cabinet; the water inlets and the water outlets of the independent cooling water tanks are arranged in series according to a thermal sequence through cooling water pipes to form independent cooling water tank groups, cooling water sequentially flows through all the independent cooling water tanks, heat of the resistor modules in the independent cooling water tanks is taken away in a layered mode, and cooling and heat dissipation are conducted on resistor loads of the resistor modules. High-power direct-current loads are modularized and then are respectively arranged in the independent water-cooling box bodies, and all the independent water-cooling box bodies are connected in series through the cooling water pipes, so that cooling water flows through each independent water-cooling box body according to a rule, and cooling of each resistor module can be effectively controlled; the high-power direct-current load can be well cooled in various selection modes.

The utility model discloses an anti-surge current safety device which comprises a box body, the box body is provided with an accommodating groove, a box cover is arranged at the opening of the accommodating groove, and the box cover and the box body are enclosed to form an accommodating space; a fuse link and an NTC thermistor are arranged in the accommodating space; the fuse link is spiral, one end of the fuse link is connected with one end of the NTC thermistor, and the other end of the fuse link penetrates through the box cover outwards to form a first connecting end of the current safety device; the other end of the NTC thermistor penetrates through the box cover outwards to form a second connecting end of the current safety device; the fuse link and the NTC thermistor are integrated in the box body, so that the space in the box body can be fully utilized, the occupied space of the fuse link and the NTC thermistor is saved, the circuit design of a product is simplified, and the fuse can be suitable for application scenes with compact space; and meanwhile, by arranging the spiral fuse link, the surge current can be further inhibited, so that the product circuit is effectively protected.

In one example, an apparatus comprise: a first power stage having a first power stage input and a first power stage output; a second power stage having a second power stage input and a second power stage output; a driver circuit having a first driver input, a second driver input, a first driver output, and a second driver output, the first driver output coupled to the first power stage input, and the second driver output coupled to the second power stage input; a first resistor network coupled between a first input of a pair of differential inputs and the first power stage output, the first resistor network including a trimmable resistor network and a trim input; a second resistor network coupled between a second input of the pair of differential inputs and the second power stage output; and a control circuit having a trim output coupled to the trim input.

A micromechanical piezoresistive pressure sensor (40;340) includes a diaphragm (44) configured to mechanically deform in response to an applied load, a sensor substrate located on the diaphragm, and a number of piezoresistive resistance devices located on the sensor substrate. The piezoresistive resistance devices are arranged in a first planar array defining a grid pattern having two or more rows, each row being aligned in a first direction. The piezoresistive resistance devices are configured to be electrically connected in a number of bridge circuits (30), whereby the piezoresistive resistance devices in each row is electrically connected in an associated bridge circuit. A method of using the micromechanical piezoresistive pressure sensor is also disclosed.

The present invention discloses an integrated monitoring lightning arrester, which includes a lightning arrester outer casing and lightning arrester resistor chips arranged therein, and further includes a pressure sensor and a sealing performance monitoring module. The pressure sensor is arranged between the lightning arrester outer casing and the lightning arrester resistor chips, and the pressure sensor is electrically connected to the sealing performance monitoring module. It can accurately monitor key state variables such as the internal sealing performance, resistive current and phase angle of the lightning arrester, reflect the operation state of the lightning arrester in real time, which has great significance for preventing the further expansion and development of lightning arrester faults, correctly guiding its maintenance work and ensuring the safety of the power grid; moreover, it can replace the power-off test and live detection of the lightning arrester, saving a large amount of manpower and material resources.

The utility model relates to a fuse type resistor. The fuse type resistor comprises a base part, a first lead end and a second lead end, wherein the first lead end and the second lead end are fixed on the base part; the resistance wire is arranged on the base part, and one end of the resistance wire is connected with the first lead end; the fuse is arranged on the carrying part; the carrying part is provided with at least two conductive parts which are connected with the two ends of the fuse respectively, the carrying part is detachably connected with the base part, and the two conductive parts are in contact conduction with the second lead wire end and the other end of the resistance wire respectively. The base part and the carrying part which are detachably connected are configured, so that the fuse and the resistance wire can be integrally assembled, meanwhile, the requirement for separation of the fuse and the resistance wire is met, the fuse part can be independently replaced in the using process, meanwhile, the whole machining and manufacturing process is simpler through a detachable mode, and the cost is reduced. And the cost is lower.

The utility model provides a lightning arrester which comprises a first lightning arrester body and a second lightning arrester body, one end of the first lightning arrester body is connected with one end of the second lightning arrester body through an upper connecting assembly, the other end of the first lightning arrester body is connected with the other end of the second lightning arrester body through a lower connecting assembly, and therefore a high-insulation lightning arrester body is formed. The first lightning arrester is provided with a base, the base comprises an insulating base, a fastening insulating ring is arranged at the top end of the insulating base, the fastening insulating ring is connected with an insulating sleeve in an inserted manner, an insulating protection seat is arranged in the insulating sleeve in an adhesive manner, and an insulating sleeve is arranged in the insulating protection seat. According to the utility model, the insulating protection seat and the insulating sleeve are arranged in the insulating base, and the lightning arrester core body of the first lightning arrester is arranged in the insulating sleeve, so that the base has a sufficient insulating effect, and the base is prevented from being damaged by a generated alternating-current arc.

The invention relates to a resistor chip and a detection device and method for the state of a voltage-sharing resistor. The resistor chip comprises a voltage-sharing resistor unit, a sampling unit and an insulating substrate, the voltage-sharing resistor unit is used for being connected to the two ends of a target energy storage capacitor of an external circuit in parallel and carrying out voltage division on the target energy storage capacitor based on the fixed resistance value of the voltage-sharing resistor unit so as to passively adjust the voltage value of the target energy storage capacitor; the sampling unit is connected with the voltage-sharing resistor unit in parallel and is used for collecting working information of the voltage-sharing resistor unit, and the working information is used for indicating the working state of the voltage-sharing resistor unit; and the insulating substrate is used for fixing the voltage-sharing resistor unit and the sampling unit. Through the resistor chip, a risk prompt is provided for operation and maintenance personnel in time, so that the safety risk caused by faults of the voltage-sharing resistor unit is reduced.

The invention relates to the technical field of zinc oxide lightning arresters, in particular to a zinc oxide resistor disc powder lightning arrester with high self-maintenance adaptability, which comprises a plurality of resistor discs, two rubber sealing blocks, two wiring bolts, two electrodes, an outer sleeve and a plurality of skirt edges, a plurality of obliquely arranged wind power blades are connected between the two mounting ring pieces, a plurality of connecting rods are mounted at the tops of the mounting ring pieces located above the wind power blades, the connecting rods are located on one side of the skirt edge, and soft rubber strip scraping plates are elastically connected to the surfaces of the connecting rods. According to the scheme, the surrounding wind blades and the soft rubber strip scrapers are arranged on the periphery of the zinc oxide lightning arrester, the wind blades are stressed to drive the soft rubber strip scrapers to rotate, so that the soft rubber strip scrapers clean dust attached to the outer surface of the zinc oxide lightning arrester, manual maintenance is not needed, and the working efficiency is improved. Therefore, the self-cleaning operation of the zinc oxide arrester can be realized.

An apparatus can a load bank module configured to electrically couple with at least one other load bank module. The load bank module and the at least one other load bank module can be further configured to electrically couple to a power source to dissipate power received from the power source. The load bank module can include trays including resistive components to dissipate the power received from the power source at a voltage level of the power source. A resistive component of the resistive components can include a coil, the coil can extending between a first end of the resistive component and a second end of the resistive component opposite the first end of the resistive component to form three or more turns of the coil.

The application provides a fusible resistor and a manufacturing method thereof, comprising a pressure-divided rod, the outer wall of the pressure-divided rod is provided with a notch, the both ends of the pressure-divided rod are tin soldered with a cap, the outer wall center of each cap is provided with a lead positioning piece, the inside of each lead positioning piece is penetrated by a lead, and the inner end of the lead is tin soldered with the cap; the outer wall of the pressure-divided rod and the cap is sprayed with an insulating protective layer; the manufacturing method comprises the following steps: selecting a pressure-divided rod; notching the pressure-divided rod; firmly welding the lead and the cap together; uniformly coating the outer wall of the pressure-divided rod and the cap with an insulating protective layer; and marking a color ring on the outer surface of the insulating protective layer. The application releases the impact force in the moment of fusing by adjusting the film-forming structure of the coating, so as to achieve the effect of preventing the coating from being broken and preventing fire; the pressure-divided rod is selected to be a pulse-resistant pressure-divided rod, so that the resistor can meet the pulse and be fused under the specified voltage; the resistor is convenient to manufacture, simple in structure, low in price and low in production cost.

The utility model relates to the technical field of resistors, in particular to a column-type wire-wound resistor, which comprises a first disc body and a second disc body which are arranged in parallel at intervals, and a first support column is arranged between the first disc body and the second disc body; a plurality of insulated supporting plates are arranged on the opposite side portions of the first disc body and the second disc body in the circumferential direction at intervals. Each supporting plate is provided with a plurality of threading rings which are arranged at intervals in the length direction of the supporting plate. The flexible resistance wire alternately bypasses the threading rings of the supporting plates of the first disc body and the second disc body, the resistance wire is arranged in a plurality of wave shapes, and the plurality of wave shapes are distributed in the length direction of the supporting plates; and two adjacent wave crests are arranged in a staggered manner in the length direction of the supporting plate. Compared with the prior art, the heat dissipation effect is good, the two adjacent wave-shaped wave crests are arranged in the length direction of the supporting plate in a staggered mode, the mutual heating influence of the resistance wires is reduced through the inner and outer adjacent staggered mode, meanwhile, the inductance can be reduced, and even the non-inductance effect can be achieved.

The utility model relates to the technical field of resistors, and discloses a glass-coated nano-copper electrode type thermistor which comprises a protective sleeve, a resistor body is fixedly connected in the protective sleeve, a thermistor chip is arranged in the resistor body, a high-temperature sintering electrode is fixedly connected to the outer wall of the thermistor chip, and the high-temperature sintering electrode is fixedly connected to the outer wall of the thermistor chip. The lower surface of the high-temperature sintering electrode is fixedly connected with a copper sheet, the inner wall of the protective layer is fixedly connected with a ceramic solidified body, the ceramic solidified body is fixedly connected with the outer wall of the copper sheet, the lower surface of the thermistor chip is provided with a glass filling layer, and a heat dissipation assembly is arranged in the resistor body. And the heat dissipation assembly is used for transferring heat inside the resistor to the outside. According to the utility model, the working temperature of the thermistor is effectively reduced, the influence of overheating on the accuracy and stability of the resistance characteristic is reduced, the service life of the thermistor is further prolonged, and the stability of the connection between the pins and the external circuit is enhanced at the same time.

The utility model relates to the technical field of loads, in particular to a water-cooling load capable of preventing scale accumulation, which comprises a barrel and a plurality of resistance tubes, the barrel comprises a barrel body and a barrel cover which jointly define a containing cavity, and a partition plate is arranged in the containing cavity so as to divide the containing cavity into an upper cavity and a lower cavity; the plurality of resistance tubes are fixed on the cylinder cover in parallel and are inserted into the upper cavity; the lower cavity is communicated with a water inlet pipe which is provided with a water inlet valve; the upper chamber and the lower chamber are communicated through a transition pipeline, and the transition pipeline is provided with a middle valve; the upper chamber is communicated with a water outlet pipe which is provided with a water outlet valve; a cleaning pipe communicated with the lower cavity is further arranged in the upper cavity, and a plurality of cleaning holes facing the resistance tube are formed in the side wall of the cleaning pipe; a blow-off pipe is arranged on the lower portion of the upper cavity and provided with a blow-off valve. The load can realize uniform cooling and heat dissipation, prolongs the service life of the resistor, has a scale cleaning function, can regularly clean scale, improves the stability of the water-cooling load, and prolongs the service life of the water-cooling load.

A thin-film resistor circuit for an integrated circuit provides low resistance by segmenting a thin-film resistor to provide a wider effective thin-film resistor in a smaller die. The die includes a substrate, multiple electronic devices integrated on the substrate and interconnected to form at least a portion of an electronic circuit, a plurality of interconnect lands arranged in a grid that interconnect the devices with external terminals, and a thin-film resistor implemented by two or more thin-film resistor segments that operate in parallel in the circuit. The segments are disposed between different pairs of adjacent columns of the grid interconnect lands, with one of the thin-film resistor segments electrically connected along its width to lands of a first column of the grid of interconnect lands, and another one of the thin-film resistor segments is electrically connected along its width to lands of a second column of the grid interconnect lands.

The present application provides a breaker box system, a power supply system, and a vehicle. The breaker box system comprises a plurality of breaker boxes, the plurality of breaker boxes not sharing a ground. Each breaker box comprises a housing, a battery cell, and an insulation detection assembly, the battery cell and the insulation detection assembly being disposed in the housing. One end of the insulation detection assembly is connected to a positive electrode of the battery cell, the other end is connected to a negative electrode of the battery cell, and a reference ground of the insulation detection assembly is the housing of the breaker box. The embodiments of the present application, by having the plurality of breaker boxes not share a ground, by providing in each breaker box an insulation detection assembly corresponding thereto, and by each insulation detection assembly being used for insulation detection of the corresponding breaker box, achieves the insulation detection of each breaker box not affecting one another, and achieves insulation detection of each breaker box.

The present invention provides a composite substrate and a circuit board. The composite substrate includes a first resistance layer and a base layer. The first resistance layer is laminated on at least one surface of the base layer. The surface of the base layer facing the first resistance layer has a plurality of protrusions. The surface roughness Ra of the base layer having the protrusions is 0.5 μm to 5 μm, and the number of protrusions is 0.1×10 3 pieces / mm to 3×10 3 pieces / mm. Due to the above limitations, the uniformity of the first resistance layer deposited on the surface of the base layer is improved, thereby improving the sheet resistance uniformity of the first resistance layer, which is useful for the manufacture of high-precision embedded resistors and beneficial to the performance of circuit boards and even electronic components.

The utility model discloses an internal winding resistor, which particularly relates to the technical field of resistors and comprises an insulating rod, a notch groove is arranged on the outer surface of the insulating rod, a resistor winding is arranged in the middle of the notch groove, iron caps are symmetrically sleeved at two ends of the insulating rod, a sealing ring is arranged on one side of each iron cap, and a groove is arranged on the other side of each iron cap. The side, close to the groove, of the iron cap is fixedly connected with a wire, and the insulating rod is sleeved with an insulating cylinder. According to the utility model, the groove matched with the resistor winding wire is arranged in the iron cap, so that when the iron cap is sleeved at two ends of the insulating rod, the iron cap is tightly attached to the resistor winding wire, and the iron cap can only rotate to be separated from the insulating rod through the matching of the resistor winding wire and the groove, but the iron cap can only rotate through the anti-skid groove on the surface of the iron cap; according to the iron cap, the attaching strength of the iron cap and the insulating rod can be improved after the insulating coating is arranged, the iron cap is prevented from rotating, and therefore the iron cap cannot be loosened when the iron cap is extruded.

The application discloses a kind of temperature control thick film resistance and its production process in the technical field of thick film resistance electric auxiliary heating, to solve the problem of existing thick film resistance product in use process inadaptation of heating power to use environment.It includes substrate, working resistance film layer and auxiliary heating resistance film layer are arranged on the substrate, a plurality of first adapter terminals are arranged on the substrate for connecting working resistance film layer, and a plurality of second adapter terminals are arranged for connecting auxiliary heating resistance film layer, positive electrode circuit and negative electrode circuit are further arranged on the substrate, a plurality of parallel branches are arranged between positive electrode circuit and negative electrode circuit, a resistor and a temperature control switch are arranged in series on each parallel branch;The application is used to automatically control different heating power in complex environment, so as to maintain the temperature stability of thick film resistance as much as possible in different environments, thereby reducing the influence of temperature on its own performance, protecting service life and use effect.