89 results about "Wire resistance" patented technology

This invention relates to the field of structural health monitoring of nuclear power plant equipment, and in particular to a method for testing the performance of high-temperature resistant long-wire strain gauges. The method includes: Step 1: Determining the temperature step for strain testing of the strain gauge; Step 2: Installing the strain gauge on a measuring beam; Step 3: Conducting room-temperature performance testing of the strain gauge; Step 4: Increasing the temperature of the high-temperature loading furnace, and repeating Step 3 under different temperature step conditions, respectively measuring and collecting the strain output, strain gauge lead-end resistance, and lead resistance of the strain gauge at each temperature step; Step 5: Calculating the actual strain; Step 6: Calculating the loaded strain; Step 7: Calculating the relative sensitivity coefficient. This invention enables the testing and calibration of the thermal output and sensitivity coefficient of high-temperature resistant long-wire strain gauges as a function of temperature. It provides accurate test data for the accurate testing and calibration of the thermal output and sensitivity coefficient of high-temperature resistant long-wire strain gauges as a function of temperature, and is of great significance.

The application provides a bonded substrate and a bonding method. A bonded substrate formed by bonding a first substrate and a second substrate comprises: an internal heat dissipation structure, which is a metal layer arranged around a metal column and embedded in at least one of the first substrate and the second substrate; and a heat conduction structure connected to the internal heat dissipation structure and exposed to a surface of the bonded substrate. The application can greatly improve the heat dissipation efficiency of a three-dimensional stacked chip by adding the internal heat dissipation structure, the external heat dissipation structure and the heat conduction structure without changing the existing chip stacking process, thereby solving the problems of increased power consumption and reduced working speed of the chip caused by the increased working temperature of the chip and the increased resistance of the wire, and prolonging the service life of the chip.

The application discloses a sheet type integrated platinum film heat flow sensor for a hypersonic shock tunnel, which comprises a glass substrate in a sheet shape, a plurality of platinum thin film lines arranged on the surface of the glass substrate along the width direction of the glass substrate, and silver paste contacts corresponding to the platinum thin film lines arranged on the side edges of the glass substrate and electrically connected with the platinum thin film lines, wherein the end of the silver paste contact away from the platinum thin film line is used for welding a lead wire. The sheet type integrated platinum thin film line resistance sensor has the characteristics of high frequency response of a two-millimeter-diameter thin film sensor. After the thickness of the glass substrate as a sensor bearing substrate is reduced, the sensor can be applied to a particularly thin part of an aircraft for heat measurement, and a measurement point with a gradient range is formed on the glass substrate, so that the aerodynamic heat of the aircraft surface with a certain gradient can be measured.

The utility model relates to the technical field of circuit protection, in particular to an energy-saving explosion-proof leadless resistor fusing device, which comprises a base mechanism, the base mechanism comprises a high-strength insulator, the lower end of the high-strength insulator is fixedly connected with a trunnion used for connection, the lower end of the trunnion is fixedly connected with a trunnion sleeve, the trunnion sleeve is rotatably connected with a fusing mechanism, and the fusing mechanism is connected with the high-strength insulator. The fusing mechanism comprises a fuse tube, the fuse tube is hollow, quartz sand is arranged in the fuse tube, the lower end of the fuse tube is fixedly connected with a lower metal hoop, the lower metal hoop is rotationally connected with the trunnion sleeve, an exhaust channel is arranged in the lower metal hoop, a groove is formed in the upper surface of the lower metal hoop, wood alloy is connected in the groove in a sleeved mode, and the wood alloy is arranged in the groove. According to the energy-saving anti-explosion leadless resistor fusing device, special anti-explosion structures and materials are adopted, and when the energy-saving anti-explosion leadless resistor fusing device is fused, rising of the internal pressure can be dredged, the shell is prevented from being broken and exploded, and the safety of surrounding personnel and equipment is ensured.

The invention discloses a high-temperature dynamic strain test system and method, and relates to the technical field of high-temperature vibration test and strain measurement, and the system comprises a high-temperature loading measurement unit, a signal extension shielding line and a signal conditioning unit. The high-temperature loading measurement unit comprises a high-temperature strain measurement sheet and a compensation sheet which are respectively adhered to the tested piece and the accompanying test piece, and the high-temperature strain measurement sheet and the compensation sheet are in common-ground connection through a shielding layer by adopting a five-wire wiring method; the signal conditioning unit adopts a symmetrically-arranged double constant current source power supply and differential amplification structure, so that sensitivity deviation and common-mode noise interference caused by lead resistance change are effectively inhibited; according to the method, the maximum strain point is accurately positioned through the combination of finite element simulation and test, a dynamic resistance signal is directly converted by adopting constant-current excitation, and accurate acquisition of a strain signal in a high-temperature vibration environment is realized. According to the invention, the problems of obvious lead resistance influence and insufficient noise suppression capability in traditional measurement are solved, and high-precision and high-reliability measurement of dynamic strain of high-temperature parts such as aero-engine blades is realized.

The invention discloses a substrate resistance heating device and a pulse laser deposition system, the substrate resistance heating device comprises a base, the base is provided with a mounting position with an opening in the front side, the left side and the right side of the mounting position are respectively provided with a conductive part, and the conductive parts are connected with copper wires; the resistance heating structure comprises a mounting part and a substrate, the mounting part is inserted into the mounting position, the mounting part can move front and back and can be taken out from the front side of the mounting position, the substrate is arranged on the mounting part and is made of a conductive material, and when the mounting part is inserted into the mounting position, a conductive path is formed between the substrate and the conductive parts on the left side and the right side. The device is simple in structure, low in cost, low in energy loss, high in heating speed and convenient to install and operate.

The present application relates to force sensor technical field, especially to a kind of micro six-dimensional force sensor, redundancy output method and robot dexterous hand, the sensor includes: lower support, with the accommodating cavity being disposed towards one end opening;Elastomer, open end of lower support is connected, including with lower support connection outer ring, from the inner wall of outer ring inwardly extending strain beam and the inner ring being set in outer ring and being connected with the inner end of strain beam;Upper support, the center of upper support has connecting part, connecting part is fixedly connected with inner ring;Wherein, the shape of accommodating cavity is adapted to the shape of inner ring and strain beam, strain beam is also pasted with star-shaped silicon strain gauge, with common node at center, current from common node flows into the star-shaped divergent state in wire grid area around it.The present application is little by the above-mentioned setting to the influence of wire resistance and temperature drift, and redundancy output is provided, so as to reduce error, improve accuracy and reliability.

The invention discloses a high-heat-dissipation new energy transformer, and relates to the technical field of transformers, the high-heat-dissipation new energy transformer comprises a base, a transformer assembly is mounted on the base, a plurality of winding resistors arranged side by side are integrated on the transformer assembly, and an outer shell and an inner shell are arranged on the outer side of each winding resistor; the inner shells are concentrically arranged on the inner side of an outer shell. In the invention, in a normal state, the air flow conveyed by the fan flows upwards layer by layer through the branch pipelines, so that the heat of the winding resistor can be taken away uniformly, the energy consumption of the fan can be reduced by natural layer-by-layer diversion, and the stable low-load heat dissipation of the transformer is ensured; when the temperature of the local cavity rises, the heat feedback execution assembly triggers the blocking unit to cut off communication between the cavity and the upper layer, meanwhile, the synchronous opening and closing unit is linked to open the corresponding heat dissipation pipe to form an independent loop, high-temperature air flow is rapidly discharged, heat accumulation is avoided from damaging parts, normal heat dissipation of the upper-layer cavity is not affected, and heat dissipation uniformity and emergency reliability are both considered.

The utility model relates to a heating system dry burning protection circuit which comprises a power switch S1, a detection circuit, a comparison circuit, a comparator, successive approximation logic and a digital circuit, one end of the detection circuit is connected with a power supply, the other end of the detection circuit is connected with a heating wire, and the detection circuit is provided with a first constant current source and a detection switch S2 and generates a first voltage signal VE; the comparison circuit comprises a detection resistor and an adjustable constant current source to generate a second voltage signal VS, the positive and negative input ends of a comparator respectively receive the first voltage signal VE and the second voltage signal VS and output a comparison result to successive approximation logic, and the successive approximation logic can adjust the current of the adjustable constant current source and output a heating wire resistance value digital code DXlt; n-1: 0gt; the digital circuit is based on the digital code DXlt; n-1: 0gt; whether the heating wire is dry-burnt or not is judged according to the relative change, an expensive and complex microcontroller (MCU) is prevented from being used, and effective monitoring and intelligent protection of the state of the heating wire are achieved through low-cost hardware.

The utility model provides a gun head line detection device, relates to the technical field of detection devices, and aims to solve the technical problem that a gun head line needs to be detected in the production process of a charging gun in the prior art. A gun head line detection device comprises a rack, a first connecting base, a micro-resistance tester, a safety tester and a control system, the first connecting base is connected to the rack and connected with at least two first sockets used for being connected with a gun head, the micro-resistance tester is connected to the rack, the safety tester is connected to the rack, and the control system is connected with the micro-resistance tester. The control system is electrically connected with all the first sockets, the micro-resistance tester and the safety tester; the control system selects the micro-resistance tester to carry out micro-resistance testing on each line, and if the resistance value of the line resistor is smaller than a set value, wiring is correct; and then the control system selects the safety tester to test the insulation resistance of each line, and if the insulation resistance is greater than a set value, the line is not damaged.

The invention discloses automatic detection equipment for a heating core of an electric hair drier, which comprises a rack, a feeding mechanism, a heating wire spacing detection mechanism and a heating wire resistance detection mechanism, and is characterized in that the feeding mechanism comprises a moving module and a positioning jig which is arranged on the moving module and is used for bearing and positioning the heating core; the heating wire spacing detection mechanism comprises a first support frame and a CCD detection assembly which is mounted on the first support frame and is used for detecting the spacing of heating wires of the heating core; the heating wire resistance detection mechanism comprises a second supporting frame fixed in the detection station, a pair of clamping assemblies used for clamping leads at the two ends of the heating wire, a lifting unit connected with the second supporting frame and connected with the clamping assemblies in a driving mode, and a resistance measuring unit electrically connected with the clamping assemblies. The clamping assembly is provided with a conductive contact part, and the conductive contact part is used for being in electrical contact with a heating wire lead to form a detection loop. The technical scheme of the invention aims to solve the problems of low manual detection efficiency and poor precision of the heating core of the electric hair drier.

The application discloses a kind of color resistant plating packaging paste and its preparation method and application, belong to electronic packaging technical field, the color resistant plating packaging paste includes glass powder and organic carrier;The glass powder includes the following components: bismuth oxide, silicon oxide, zinc oxide, additive, zirconium oxide, titanium oxide, aluminum oxide, calcium carbonate;The organic carrier includes resin, and the resin includes that the mass ratio of ethyl cellulose, acrylic resin and polyvinyl butyral resin is 1: (0.4~1.6) : (0.4~1.6);The additive includes that the mass ratio of boric acid and sodium carbonate is (7~10) : (0.5~3).The packaging paste is less than 1% to silver wire resistivity influence, the resistance value influence of thick film resistance is 100Ω / m and 1kΩ / m is less than 1.5%, after chemical nickel-palladium-gold plating, glass glaze surface gloss has no loss, thickness has no loss, with wide application prospect.

The utility model discloses a parallel calibration device for a sensor, which comprises a plurality of bridge arm resistors RB, a lead resistor RL is respectively connected between two adjacent bridge arm resistors RB, and a parallel resistor R4, a switch K3, a parallel resistor R5, a switch K4, a parallel resistor R3 and a switch K1 are connected in parallel between a lead resistor RL2 and a lead resistor RL3. A parallel resistor R1 and a parallel resistor R2 are connected between the wire resistor RL1 and the wire resistor RL3, a circuit between the parallel resistor R1 and the parallel resistor R2 is connected with a switch K2, the other end of the switch K2 is connected with a wire resistor RL4, and the circuit is controlled by a switch K3 and a switch K4 to be switched to be connected to a local bridge arm or a remote bridge arm of an input bridge circuit in parallel. According to the utility model, through optimizing the connection line selection of parallel calibration, the measurement error caused by lead resistance is effectively reduced, the calibration precision of the sensor is improved, and the universality and adaptability of the calibration device are enhanced.

This invention discloses a resistance testing method, relating to the technical field of intelligent testing, comprising the following steps: Step S100, testing a resistor of any type, independently analyzing the test results to obtain its own characteristics; Step S200, performing forward and reverse tests on the resistor under test according to the testing method, obtaining positive and negative results; Step S300, classifying the resistor under test into grades based on the positive and negative results and its own characteristics. This invention improves the scientific nature of subsequent analysis and the rationality of test parameters by screening effective historical data, avoiding irreversible damage to the resistor, and improving the economy of testing. By taking the average value of forward and reverse tests and analyzing the difference, it eliminates unidirectional systematic errors such as contact resistance, lead resistance, and thermoelectric potential.

1. The name of the design product: constant temperature water bath intelligent online resistance detection system. 2. The use of the design product: device for online detection of DC resistance of metal conductor. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: perspective view. 5. The bottom of the design product is not easy to see or not visible during use, omit the top view.

This invention provides an environmentally friendly flame-retardant PC resistant to high glow wire and its preparation method. The PC comprises: a matrix PC resin 1, a matrix PC resin 2, a branched PC resin, and tungsten diselenide nanoparticles. The material prepared by this invention not only has the advantages of high glow wire resistance and anti-dripping properties, but also has certain environmental value because the polymer material prepared by this invention does not use halogen-based flame retardants and requires less anti-dripping agent.

Provided are: a silver powder in which the wire resistance is reduced when an electrode is formed by gelatinizing the obtained silver powder by modifying the surface of the silver powder; and a method for producing the silver powder. When precipitating metallic silver particles from an aqueous solution containing silver ions, a gallium compound is made to coexist in the aqueous solution, and a reducing agent having an effect of reducing the pH of the aqueous solution by addition thereof or a reducing agent having an effect of reducing the pH of the aqueous solution by an oxidation product of the reducing agent is used as a reducing agent. As a result, it is possible to obtain a gallium oxide-coated silver powder in which the resistance of an electrode is low when the deposited silver powder is gelatinized to form the electrode.

The utility model relates to the technical field of inductor processing, and discloses a coil winding device for inductor processing, which comprises a base and a bottom plate, one side of the base is provided with a driving wheel, the upper side of the driving wheel is provided with a winding ring, the upper side of the winding ring is provided with a fixed wheel and a wire pressing wheel, the winding ring is provided with a wire storage groove and a discharge notch, and the discharge notch is provided with a coil winding groove. A wire blocking ring is arranged at the position, located at the discharging notch, of the winding ring; a deflection frame and a driving motor are arranged on the upper side of the bottom plate, clamping wheels are arranged on the upper side of the deflection frame and the driving motor, the number of the clamping wheels is at least three, the clamping wheels correspond to the winding rings, and limiting rings are arranged on the lower sides of the clamping wheels. The winding ring is used for winding the copper wire, the driving motor controls the iron core to rotate uniformly, the coil of the iron core is uniformly wound, in the winding process of the winding ring, the bending of the copper wire is reduced, the surface of the copper wire is protected, the damage to the copper wire is reduced, meanwhile, the winding device is suitable for winding the fine copper wire, and the practicability and the reliability of equipment are improved.

A memory device comprises multiple memory cells, a word line, multiple bit lines, and multiple source lines. Each memory cell includes a once-programmable element (OTP element) and multiple selection transistors. The word line is connected to the gate terminals of the selection transistors of a memory cell. The bit lines are connected in parallel between a first node and a first OTP element terminal of the OTP element of the memory cell. The source lines are connected in parallel and connect second source / drain terminals of the selection transistors of the memory cell to a second node. A method for fabricating the memory device is also disclosed.

The utility model provides a transformer coil winding structure and a transformer, and relates to the technical field of transformer coils, the transformer coil winding structure comprises a winding structure, a coil lead and an air passage layer, the coil lead penetrates and is wound above the outer side surface of the winding structure to form a plurality of layers of inner coil structures; the coil leads of the aligned rows of coils in the adjacent layers of inner coil structures are integrally connected and are opposite in winding direction, the air channel layer is combined to the outer side face of the outermost layer of inner coil structure, and the coil leads of the last row of coils in the outermost layer of inner coil structure penetrate through the air channel layer and are wound on the outer side face of the air channel to form a plurality of layers of outer coil structures. Each row of coils in each layer of outer coil structure are aligned in the vertical direction, and coil leads of each row of aligned coils in adjacent layers of outer coil structures are integrally connected and are opposite in winding direction. According to the utility model, interlayer voltage and segment voltage of the coil are reduced, lead length and lead resistance loss are reduced, and the leads do not need to be welded.

The invention relates to a three-wire system resistance temperature measurement circuit, which belongs to the field of temperature measurement, and comprises a power supply output circuit configured to output a power supply voltage; a voltage reference circuit connected to the power output circuit and configured to output a reference voltage based on the power voltage; the resistor is connected to the circuit. According to the three-wire system resistance temperature measurement circuit, the differential voltage signal between the positive input ends of the two operational amplifiers is extracted and amplified through the double-operational-amplifier instrumentation amplifier circuit, then the voltage signal is output, the output voltage is only related to the temperature of a resistance device and is not affected by the resistance of the input line and the output line, and the temperature measurement accuracy is improved. Therefore, the temperature of the resistance device can be calculated through backstepping by detecting the output voltage, the temperature measurement stability and precision are greatly improved compared with those of a thermocouple, the circuit is simple, the design cost is low, debugging is avoided, and large-scale application to products is facilitated.

The invention discloses an intelligent storage box for ground wires. The intelligent storage box comprises a box body, a take-up shaft, a driving mechanism, a uniform winding mechanism and a controller. Rollers are arranged at the bottom of the box body; a box cover is arranged on the side surface of the box body; a handle is arranged at the top; the uniform winding mechanism comprises an electric push rod and a wire outlet guider, and automatic reversing is achieved through a limiting switch. The device further comprises a state monitoring unit and a state recovery unit, wherein the state monitoring unit comprises a direct current resistance tester, a temperature and humidity sensor and a temperature and humidity controller. One-button type automatic neat storage of the ground wires is achieved, resistance detection of the ground wires is achieved through the electric brush contact ring, the storage environment automatic regulation and control function is achieved, and meanwhile a manual take-up mechanism is arranged to serve as emergency guarantee. The device effectively solves the problems of winding and knotting, low efficiency, lack of state monitoring and the like existing in traditional ground wire storage, and the safety and the working efficiency of electric power operation are remarkably improved.

The invention provides a combined transposed conductor resistance on-line detection method, which belongs to the technical field of transformer manufacturing, and comprises the following steps: cleaning the surface of a contact area of a combined transposed conductor to be detected, starting a detection device, and completing self-detection and short circuit zero clearing operation; driving the clamp head to clamp the wire from at least two directions to form a stable conductive loop; multiple times of on-off measurement are carried out through a stabilizing circuit, a resistance average value is obtained by adopting a Fourier derivative calculation method, and winding phase sequence information is recorded in real time; calculating a resistance unbalance rate according to the connection mode of the transformer, and starting an alarm mechanism and generating a matching suggestion after comparison and analysis; and marking unqualified lead sections, enabling qualified leads to enter the next process, and resetting the device to prepare for the next detection. According to the combined transposed conductor resistance online detection method provided by the invention, online detection of the combined transposed conductor resistance can be realized, the resistance matching problem can be found in time, the production cost is reduced, and the production efficiency and the product quality are improved.

A method and system for evaluating the soldering quality of a metal gate line and solder strips, the method comprising: constructing a resistance model of a target object (100) to obtain a relational expression of resistance R between solder strips (130) of a preset spacing D of the target object (100), gate line resistance Rf per unit distance of a gate line (120), contact resistance Rc between the gate line (120) and the solder strips (130), and resistance Rr of the solder strips (130) extending out of the edge of a body (110); measuring resistance values R between the solder strips (130) of different spacings D; on the basis of measurement results, obtaining a relationship diagram between the resistance values R and the spacings D; and, on the basis of the relational expression and the relationship diagram, evaluating the soldering quality of the target object (100). The method and system for evaluating the soldering quality of a metal gate line and solder strips can improve soldering processes on the basis of evaluation results, so as to improve the soldering quality, thereby improving the performance of entire battery modules.

The present application relates to power supply dynamic efficiency detection technical field, and disclose a kind of power supply dynamic efficiency online evaluation detection method, comprising the following steps, shunt resistance and binding post key position in resistance load instrument are deployed acquisition module, temperature is collected in real time, resistance change caused by temperature is converted into electric signal, in the present application, the scheme is deployed thin film platinum resistance acquisition module in resistance load instrument shunt resistance and binding post key position, four-wire connection method is used to eliminate lead resistance influence, establish the relationship model of shunt resistance and binding post temperature and resistance, the resistance change amount is calculated in combination with Kalman filter and adaptive weighted average algorithm, the measurement signal is corrected in real time by compensation module consisting of programmable gain amplifier and digital potentiometer, the measurement error caused by shunt resistance and binding post temperature change can be reduced by more than 90%, the measurement accuracy of electronic load instrument is improved to ±0.1% or less, ensure that power supply dynamic efficiency evaluation detection result is accurate and reliable.

The invention discloses a manufacturing method of a thin film jumper resistor. In the method, a substrate is provided. The substrate is provided with a front surface, a back surface, a first side surface and a second side surface, a first resistive layer and a second resistive layer are respectively formed on the front surface and the back surface. The first and second resistive layers are patterned using a laser to separate the first and second resistive layers from an outer edge of the substrate. The first resistive layer and the second resistive layer each comprise a middle section, a first end section and a second end section. Forming a first insulation protection layer and a second insulation protection layer respectively covering the middle sections of the first resistance layer and the second resistance layer; and forming a first end electrode and a second end electrode. The first end electrode extends from the first end section of the first resistive layer to the first end section of the second resistive layer through the first side surface. The second end electrode extends from the second end section of the first resistive layer to the second end section of the second resistive layer through the second side surface. The resistive layer is defined in a laser patterning mode, miniaturization of the thin film jumper resistor can be achieved, and the advantage of low cost is achieved.

The utility model discloses a novel three-terminal fuse control circuit, and belongs to the technical field of fuse control circuits. The novel three-terminal fuse control circuit comprises an optocoupler U4, an MOS tube Q16, a slide wire resistor R79, a slide wire resistor R80, a slide wire resistor R78, a capacitor C70, a slide wire resistor R77, a slide wire resistor R74, an MOS tube Q15, a slide wire resistor R73, a slide wire resistor R75, a slide wire resistor R72, a capacitor C69, a voltage-regulator tube ZD5 and a transient suppression diode D4. The embodiment of the utility model has the beneficial effects that a short-circuit point is cancelled, and welding is not needed after the battery is assembled. And the three-end fuse is prevented from being mistakenly triggered and damaged due to the fact that peak voltage generated by load operation is connected into a single cell in series. And the three-end fuse is prevented from being mistakenly triggered and damaged due to wire breakage protection caused by loosening of the flat cable.

The invention belongs to the technical field of aviation, and particularly relates to an aviation high-power motor round wire alternating current copper loss evaluation and reduction method, which comprises the following steps of: based on a stator after wire embedding, measuring wire resistances at different frequencies and different rotor positions by adopting an alternating current resistance tester, further calculating alternating current copper loss again by using simulated phase current, and judging whether the alternating current copper loss is met or not; if yes, completing the design; and if not, optimizing the alternating current copper loss again, and repeatedly calculating the alternating current copper loss until the alternating current copper loss meets the requirement. MotorCAD software is adopted to calculate alternating current copper loss through finite elements, modeling is simple, winding subdivision is refined, and the difference between the calculation result and the actual result is small. The stator winding mode is optimized, and the ring current of the groove leakage flux on the same turn of wires located at different groove height positions is reduced; and the stator slot size is optimized, so that the slot size with relatively low alternating current copper consumption can be obtained. Part of tests prove that the alternating current copper consumption can be greatly reduced, and the motor efficiency is improved.

The invention provides a temperature control method, a heating plate temperature control system and a computer readable storage medium. The temperature control method comprises the following steps: acquiring a working condition state of semiconductor processing equipment; in response to the condition that the working condition state indicates that the semiconductor processing equipment is not subjected to heating wire resistance-temperature curve calibration, adopting a first control mode, and performing temperature measurement through a thermocouple arranged in a central area of a heating disc of the semiconductor processing equipment so as to perform temperature control and heating wire resistance-temperature curve calibration on the heating disc; and in response to the condition state, indicating that the semiconductor processing equipment has been calibrated by the heating wire resistance-temperature curve, adopting a second control mode to measure the resistance of the heating wire in the heating plate, and performing temperature measurement and temperature control on the heating plate in combination with the heating wire resistance-temperature curve.

The utility model discloses a novel glass fabric secondary desizing device which comprises a rotating shaft, a desizing wheel body and an outer sleeve, the rotating shaft, the desizing wheel body and the outer sleeve are all cylinders, the rotating shaft coaxially penetrates through the desizing wheel body and is used for erecting and rotating the desizing wheel body, and a hollow groove is formed in the desizing wheel body. A plurality of first air holes communicated with the hollow groove are evenly distributed in the outer wall and the end face of the desizing wheel body at intervals, the outer sleeve is coaxially and detachably arranged on the outer ring of the desizing wheel body in a sleeving mode, a plurality of second air holes are formed in the outer wall of the outer sleeve, and the glass fabric is divided into two rolls to be wound between the outer wall of the desizing wheel body and the inner wall of the outer sleeve and on the outer wall of the outer sleeve respectively. According to the desizing wheel, the desizing effect of the middle-layer glass fabric of the desizing wheel can be remarkably improved, and slurry residues on the surface of glass fiber yarn are reduced, so that the impregnation property of the glass fabric is improved, downstream resin and the glass fabric can be more effectively combined, the heat resistance, conductive anode wire resistance and other properties of a plate are improved, the additional value of a product is improved, and the high-end market can be quickly seized.