143 results about "Dc resistance" patented technology

The invention relates to the technical field of electric power, in particular to a cable nondestructive testing method which comprises the following steps: acquiring corresponding calibration parameters from a database according to the model of a to-be-tested cable, and calculating the total length and fault position of the to-be-tested cable at the near end of the to-be-tested cable by adopting a time domain reflection method; at the tail end of the cable to be detected, at the tail end, at least two core wires are short-circuited, a four-wire detection method is adopted to measure the direct-current resistance of a core wire loop at the near end, and standard temperature correction is conducted on the direct-current resistance of a single core wire; the resistivity to be measured is calculated by using the total length of the cable to be measured, the actual cross sectional area of the core wire and the direct current resistance of the single core wire at the standard temperature, and whether the actual core wire material of the cable to be measured is qualified is analyzed according to the resistivity to be measured and a resistivity threshold value set based on the calibrated core wire material. And early warning is carried out based on a core wire material analysis result and a fault position. According to the method, the cable length, the fault position and the core wire material qualification can be quickly, nondestructively and accurately detected on site.

The utility model discloses a new energy automobile copper clad aluminum braided shield high voltage cable in the technical field of high voltage cable, including stranded copper conductor, the fixed extrusion of insulating layer has on the outer wall of stranded copper conductor, the insulating layer is cross -linked polyethylene or cross -linked polyolefin insulating layer, the insulating layer outside fixedly set semiconductive inner layer, fill in the PP filling strip between semiconductive inner layer with insulating layer, the outer wall of semiconductive layer extrudes and has copper clad aluminum braided shield layer, copper clad aluminum braided shield layer is 0.1~0.2 tinned copper clad aluminum wire, and with semiconductive inner layer is 360 degree ring pressure contact, the outer wall of copper clad aluminum braided shield layer fixed extrusion has aluminum foil layer, the outer wall of aluminum foil layer fixed extrusion has semiconductive outer layer, the outer wall of semiconductive outer layer fixed extrusion has cross -linked polyolefin sheath, the utility model discloses can reduce the shielding layer direct current resistance, guarantees the continuity of grounding, promotes high -frequency shielding efficiency, strengthens in 100kHz~30MHz frequency band shielding attenuation.

A resistance calculation device includes: a characteristic calculation portion configured to calculate a shrinkage rate for each single electrode based on a capacity shift amount of a positive electrode of a deteriorated secondary battery, a capacity shift amount of a negative electrode of the deteriorated secondary battery, a deterioration amount of the positive electrode, and a deterioration amount of the negative electrode, and to calculate a curve representing characteristics of a state of charge and an open circuit voltage of an equivalent circuit of the deteriorated secondary battery by deforming an opening end potential curve for each single electrode before deterioration of the deteriorated secondary battery by the shrinkage rate for each single electrode based on a fixed point; a change amount calculation portion configured to calculate an amount of change in the open circuit voltage of the equivalent circuit based on a difference between the opening end potential curve for each single electrode before the deterioration and the curve representing the characteristics of the state of charge and the open circuit voltage of the equivalent circuit; and a resistance calculation portion configured to calculate a DC resistance of the equivalent circuit by dividing a result of addition of an amount of change in a DC voltage of the equivalent circuit to which a pulse current is applied and the amount of change in the open circuit voltage of the equivalent circuit by a current value when the pulse current is applied to the equivalent circuit.

The embodiment of the invention provides a method and device for determining filter inductance parameters of a switching power supply conversion circuit and a medium. The method comprises the following steps: setting two ends of an output filter capacitor at the output end of a switching power supply as sampling points and connecting a radio frequency connecting line to lead a ripple signal out of a high-low temperature test box for measurement, so that an output voltage ripple amplitude at a preset temperature can be accurately obtained under the condition that the high-low temperature test box is not opened; when the ripple exceeds a preset output ripple amplitude, a magnetic ring winding inductor is installed at the position of an output filter inductor, and the number of winding turns and / or the length of a wire are / is adjusted to adjust an inductance value and a direct-current resistance parameter, so that an output filter inductor parameter meeting a ripple index is rapidly determined; the problems that in the prior art, measurement and adjustment cannot be conducted at the same time in the high and low temperature environment, dead halt and restart are easily caused by large ripples in the mass production stage, and the repeated revision cost is high are solved.

The invention belongs to the technical field of batteries, and particularly discloses a secondary battery, a preparation method thereof and a power utilization device. The secondary battery comprises a positive pole piece, an isolating membrane and a negative pole piece, the positive pole piece comprises a positive current collector and a positive membrane layer located on at least one side surface of the positive current collector, the positive membrane layer comprises a positive active material, a carbon nanotube, graphene, hydrogenated butadiene-acrylonitrile rubber and a modified compound of the hydrogenated butadiene-acrylonitrile rubber, and the graphene has a sheet structure. A carbon nano tube is connected between the graphene with the sheet structure, and a plurality of holes are formed in the surface of the graphene with the sheet structure. According to the design mode provided by the invention, the direct-current resistance of the battery is reduced by improving the conductivity of the pole piece.

The embodiment of the application discloses a control method and device of an air conditioner air-sweeping motor, an air conditioner and a storage medium, and relates to the technical field of air conditioners. The method comprises the following steps: detecting a current voltage between the direct-current resistance; judging whether the current voltage is lower than a predicted voltage, wherein the predicted voltage is a winding temperature of a motor winding at a preset winding temperature, and is measured by detecting the voltage between the direct-current resistance; if the current voltage is lower than the predicted voltage, controlling the air-sweeping motor to slightly swing so that the winding temperature is higher than the preset winding temperature. When the current voltage of the direct-current resistance is lower than the predicted voltage, the heat generation is increased by controlling the slight swing of the air-sweeping motor, so that the winding temperature of the motor winding is increased, the winding temperature is ensured to be always higher than the preset winding temperature, and the effect of eliminating the internal condensation of the air-sweeping motor is achieved.

The present disclosure provides a coil component having a structure capable of reducing DC resistance and floating capacity, and an electronic device including the same. A coil component (1) according to the present disclosure comprises: a first coil formed into a cylindrical shape by bending a rectangular first conductor in the long-side direction; a second coil formed into a cylindrical shape by bending a rectangular second conductor in the long-side direction; a first lead wire and a second lead wire; and a third lead wire and a fourth lead wire. The first lead wire is electrically connected to an input electrode. The second lead wire and third lead wire are electrically connected to an intermediate electrode. The fourth lead wire is electrically connected to an output electrode. The first coil and the second coil are disposed on a substrate so that a first winding axis of the first coil and a second winding axis of the second coil are substantially parallel to the substrate.

A conductor DC resistance testing device disclosed by the present invention comprises a detection table, a detection bridge, two first clamps and two second clamps, a cavity layer is arranged in the detection table, an S-shaped bent electric heating tube is arranged in the cavity layer, and wrapping covers used for wrapping the detection table after being folded are arranged on both sides of the detection table. First connecting lugs are arranged at the two ends of the wrapping cover, connecting holes are formed in the first connecting lugs, a rotating shaft penetrating through the connecting holes is arranged on the detection table, and a thermometer is arranged on the inner wall of the wrapping cover. After being combined, the two wrapping covers can wrap the outer side of the detection table, the electric heating pipes heat the space in the wrapping covers, meanwhile, the thermometers are used for monitoring the change of the temperature in the wrapping covers, and after the temperature is controlled to range from 15 DEG C to 25 DEG C and is stabilized for a period of time, conductor resistance testing can be conducted on the cable. And finally, the ambient temperature around the cable can be always controlled between 15 DEG C and 25 DEG C, so that the measurement accuracy can be improved.

The invention relates to the technical field of cable direct-current resistance testing, and provides a polymorphic direct-current resistance testing device which comprises a main frame, a to-be-tested cable is arranged above the main frame, a spring clamp is arranged on the side face of the to-be-tested cable, and an electric lifting table is fixedly connected to the side face of the spring clamp. The side surface of the electric lifting platform is slidably connected with a vertical guide rail, and one end of the to-be-tested cable is provided with a test frame. Through arrangement of a cooperative structure of the spiral frame, the adjusting column, the quantitative sliding rail and the electric sliding table, the contact point of the spiral frame and the to-be-tested cable rotates along with sliding of the adjusting column, continuous adjustment of the bending radius is achieved, the problem that in the prior art, the bending form is single due to the fact that the radius of a bending wheel is fixed is solved, and the bending accuracy is improved. Various bending radius requirements in actual working conditions can be simulated, and the authenticity and comprehensiveness of bending testing are improved.

The invention relates to the field of charging cable detection, and discloses a DP-DN wire for checking the internal resistance of a wire rod, which comprises an intelligent control module arranged in a charging adapter and an intelligent management module arranged in electronic equipment. The two modules communicate and negotiate through a data wire core to determine a basic internal resistance test mode or an advanced diagnosis mode. In the basic mode, DC resistance measurement is cooperatively performed. In the advanced diagnosis mode, the intelligent control module injects an alternating current detection signal and collects an adapter end phasor; the intelligent management module collects the phasor of the electronic equipment end and transmits the phasor back through the load modulation unit. A central control unit of the intelligent control module calculates complex impedance according to phasors at the two ends, compares a real-time impedance spectrum with a fault feature library through a diagnosis and matching engine, and determines a state identifier. And the self-adaptive charging strategy controller adjusts charging parameters accordingly. According to the invention, the cable state can be accurately diagnosed, and self-adaptive safe charging is realized.

The application discloses a kind of considering electric-thermal coupling feedback's DC cable parallel operation evaluation method and system, it is related to high voltage direct current transmission technical field, to solve the problems such as the distortion of current distribution calculation, the large deviation of temperature prediction, the low utilization rate of carrying capacity of existing technology in DC cable parallel, it includes obtaining the multi-source heterogeneous data of each parallel DC cable;Build DC resistance-temperature dynamic model, cable temperature distribution model based on equivalent thermal circuit method and the circuit constraint equation group of parallel DC cable system into electric-thermal coupling nonlinear equation group;Using improved Newton-Raphson method algorithm iteration solves electric-thermal coupling nonlinear equation group to obtain the conductor temperature of each DC cable, and according to its parallel operation state is evaluated to obtain evaluation result.The application can realize the accurate coupling calculation of parallel DC cable current distribution and temperature distribution, provide scientific basis for the design, operation and maintenance and expansion reconstruction of extra-high voltage direct current transmission project.

The invention relates to the technical field of electrical measurement, and discloses an end face clamp for measuring the direct current resistance of a conductor, which comprises a clamp shell, a rotary connection cylinder arranged on the outer circumference of the clamp shell, an internal rotary connection adjusting bolt, a sleeve seat sleeved on one end of the adjusting bolt in the clamp shell, a ball bearing and a chuck arranged outside the sleeve seat, and an assembly cylinder connected with two sides of the outer part of the sleeve seat, and a bolt is inserted inside. The current-conducting plate is inserted in the clamp shell, mounting holes are circumferentially formed in the current-conducting plate, copper nails are inserted in the mounting holes, an oil way is arranged on the side face of the current-conducting plate in the clamp shell and filled with hydraulic oil, and a manual ball valve is arranged at an oil port. A lifting handle is hinged to the top of the clamp shell, and the operating end of the lifting handle is movably connected with the piston and inserted into the oil way. The copper nail is sleeved with a first spring, a pressure gauge is installed outside the clamp shell, and a power-on connector is installed on the surface of the current-conducting plate. According to the clamp, the chuck is convenient to replace, clamping force control accuracy is improved, flexible adjustment can be achieved, current input is even and stable, and use quality is improved.

The utility model discloses a radio frequency identification (RFID) electronic tag embedded body and an environment-friendly RFID room card. The RFID electronic tag embedded body comprises a chip, a main coil antenna, a paper base material and a gap bridge antenna; the main coil antenna is arranged on one side of the paper base material, and the gap bridge antenna is arranged on the other side of the paper base material; the two faces of the paper base material are coated with waterproof wear-resistant coatings. The main coil antenna and the gap bridge antenna are formed through a metal etching process; and the main coil antenna and the gap bridge antenna form loop conduction in a physical riveting manner, and are electrically connected with the chip. According to the utility model, the paper base material coated with the waterproof wear-resistant coatings on the two surfaces is adopted, so that the paper weakness is overcome and the etching process is adapted. The main coil and the gap bridge coil are arranged on the two sides of the base material respectively and are formed through low-direct-current-resistance etching metal, and the electrical performance is improved. Physical riveting connection is reliable and stable, and the problem that paper base materials are prone to breakage during connection is solved. The embedded body is environment-friendly, good in process adaptability and excellent in electrical performance, and can be reliably embedded in a hard shell.

An inductor and a method for manufacturing the same are presented. The inductor includes a coil formed of a conductor and having a serpentine shape. The coil can have an "S" shape. The coil has two leads extending from opposite ends of the coil. An inductor body surrounds the coil and portions of the leads. The leads can be wrapped around the body to create contact points on an exterior of the inductor.

The invention relates to a mechanical electric actuating mechanism function verification system and method. The system is characterized in that a man-machine interaction module receives input function test information and sends the information to a host control module; the host control module controls the alternating current control module and the direct current control module to output an alternating current voltage signal and a direct current voltage signal to the electric actuating mechanism through the interface module according to the function test information; the host control module controls the function measurement module to respectively acquire operation current measurement data, operation duration measurement data, direct current resistance measurement data and insulation resistance measurement data of the electric actuating mechanism based on an on-off feedback signal of the limit switch fed back by the interface module; whether the operation current measurement data, the operation duration measurement data, the direct current resistance measurement data and the insulation resistance measurement data meet the function verification requirements in the function test information or not is verified, and a function verification result of the electric actuating mechanism is obtained. The method is beneficial to improving the accuracy of function verification of the electric actuating mechanism.

The utility model relates to the technical field of direct-current resistance test auxiliary devices, in particular to a direct-current resistance test device for a medium-voltage vacuum circuit breaker, which comprises a base, a circuit breaker main body, a connecting pipe, a plum blossom contact, a conical auxiliary block, an insulating cylinder, a resistance tester, a lead and a test pen, a plurality of groups of connecting pipes are arranged on the left side of the circuit breaker main body, tulip contacts are arranged at the upper ends of the connecting pipes, a conical auxiliary block is arranged in each tulip contact, an insulating cylinder is fixedly arranged on the left side of each conical auxiliary block, a resistance tester is arranged above the left side of the base, and one end of a test pen is arranged in each conical auxiliary block. In the use process of the DC resistance test auxiliary device, the conical auxiliary block can have more contact surfaces with the contact, and due to the insertion type, the contact pressure is enhanced, the risk of poor contact or line falling in the test process is reduced, and the accuracy of test data is further enhanced.

The utility model relates to the technical field of insulation resistance and direct current resistance testing, in particular to an insulation and direct current resistance testing device for an auxiliary contact of a high-voltage circuit breaker and a low-voltage circuit breaker, which comprises an upper computer, a lower computer and a secondary side socket. The secondary side socket is used for being connected with a high-voltage circuit breaker and a low-voltage circuit breaker to be tested; the lower computer comprises an acquisition / processing unit, a direct current resistance / insulation switching circuit, an insulation voltage boosting / switching circuit and a power supply; the acquisition / processing unit comprises an AD conversion module, an isolation / drive circuit and an isolation / drive output state monitoring circuit which are respectively in communication connection with the MCU, and the AD conversion module is respectively connected with the direct current resistance measurement channel, the insulation current measurement channel and the insulation voltage measurement channel. Relays are utilized to control corresponding contacts to be connected into a circuit, and manual insulation testing and direct current resistance testing are replaced for auxiliary contacts of the high-voltage circuit breaker and the low-voltage circuit breaker.

The application discloses a method and device for quick degassing of a large-length submarine cable insulating core, comprising the following steps: S1, sealing one end of the insulating core and connecting the sealed end with a gas guide pipe; S2, connecting two ends of the insulating core with a direct current power supply; S3, determining the degassing insulating core meterage, measuring the initial direct current resistance, and calibrating; S4, inputting the conductor direct current resistance value reaching the specified temperature through a direct current power supply control page; S5, selecting the current or voltage rising speed; S6, when the temperature of the conductor rises to the degassing setting temperature, disconnecting the power supply and switching to a hot air heating circulation system; S7, passing the hot air heated to the specified temperature into a degassing room, and placing a thermocouple in the degassing room to monitor the temperature in real time until the specified degassing temperature is reached and maintained. According to the application, the time required for the large-length submarine cable insulating core to reach the degassing temperature specified by the process is greatly shortened, the production efficiency is high, the investment in the submarine cable insulating core degassing equipment is reduced, and the submarine cable production cost is lowered.

The invention discloses a ground screen and a preparation method thereof, the ground screen comprises cable paper, the cable paper is provided with a plurality of metal coating belts, the upper edge and the lower edge of the ground screen are respectively provided with acetal enameled copper wires, the metal coating belts and the acetal enameled copper wires are welded together through equipotential connection copper belts, and ground screen outgoing lines are welded on the equipotential connection copper belts. The metal belt used by the ground screen is replaced by the metal coating belt with higher adhesive force and good bending resistance, the thickness is small, the bending resistance is high, the conformality is good, the acetal enameled copper wire with insulation is arranged on the edge of the ground screen, the shape of a narrow-edge electrode formed by the metal coating belt at the upper end and the lower end of the ground screen can be effectively improved, and the service life of the ground screen is prolonged. The ground screen electrode is reasonable in overall structure, large in direct-current resistance, high in reliability, convenient to assemble, capable of improving electric field distribution at the end of the ground screen, reducing the electric field intensity at the end of the ground screen, improving main insulation electric field distribution at the end of the ground screen and greatly improving safety and reliability of use of the ground screen electrode, and suitable for being placed between transformer coils.

The invention discloses a battery pack battery voltage prediction method, device, equipment and medium, and relates to the field of battery pack detection.The method comprises the steps that in the whole vehicle starting process, a to-be-detected battery pack is placed under a preset pre-charging pulse working condition, and the pulse voltage and pulse current change of the to-be-detected battery pack under the preset pre-charging pulse working condition are obtained; according to the pulse voltage and the pulse current change, direct current resistance characteristics of the to-be-detected battery pack are extracted; the direct-current resistance characteristics comprise discharge direct-current internal resistance characteristics and change rate characteristics of the discharge direct-current internal resistance; determining the actual working condition of the to-be-detected battery pack, and compensating the discharge direct-current internal resistance according to the actual working condition and the direct-current resistance characteristics; and predicting the battery voltage of the to-be-detected battery pack according to the actual working condition and the compensated discharge direct-current internal resistance. According to the method, the problem of prediction deviation caused by the fact that an existing offline table cannot adapt to temperature change and battery aging difference is effectively solved.

The utility model discloses a ground wire group direct current resistance tester with a wire clamp structure, which comprises a shell, the top end of the inner wall of the shell is fixedly connected with a first hollow plate, the corners of the opposite surfaces of the first hollow plate and a second hollow plate are fixedly connected with cushion blocks, and the opposite surfaces of the upper and lower groups of cushion blocks are fixedly connected with tester bodies. The top center of the tester body is fixedly connected with a display, one end of the top of the tester body is fixedly connected with a plurality of groups of twisting covers, and the other end of the top of the tester body is fixedly connected with a plurality of groups of wires; the grounding wire group direct current resistance tester is provided with the wire clamp mechanism, when the tester is used for power-off maintenance of high-voltage equipment, the wire clamp mechanism is installed at a designated position in advance, the human body cannot be harmed when the equipment is suddenly powered on and induced voltage generated by adjacent high-voltage electrified equipment, the use efficiency of the tester is improved, and the test cost is reduced. And meanwhile, the working difficulty of testers is also reduced.

This invention belongs to the field of eddy current displacement sensor technology, specifically relating to a method for compensating for temperature drift in an eddy current displacement sensor probe. A DC resistance acquisition circuit acquires the DC resistance value of the measuring coil in the probe, which is then processed by a conditioning circuit into a temperature signal proportional to temperature. The probe temperature drift compensation circuit uses the obtained temperature signal and the characteristic curves of the sensor probe's output displacement signal at different temperatures to perform compensation and correction, obtaining a target output displacement signal that eliminates probe temperature drift. This invention effectively compensates for the temperature drift of the eddy current displacement sensor without changing the probe structure or increasing the number of components or wiring configuration.

A drum collector ring precision conductive friction pair test device belongs to the technical field of new energy engineering machinery vehicle cable drums, and comprises a height-adjustable slide block mechanism, a V-shaped positioning block, a precision electronic scale and a direct current resistance tester. The height-adjustable sliding block mechanism comprises a base and a vertical guide sliding block pair arranged on the base. And a circuit board brush wire mounting plate which transversely extends out is fixed on a sliding block of the guide sliding block pair. And the V-shaped positioning block for placing the conducting ring is placed on the precision electronic scale. And two probes of the direct current resistance tester are respectively used for connecting the detection end of the circuit board and the conducting ring. The vertical position of the sliding block is controlled to change the contact pressure between the circuit board brush wires on the two sides and the conducting ring below the circuit board brush wires, the pressure values are displayed through the precision electronic scale, and meanwhile the direct-current resistance tester is used for detecting contact direct-current resistance values corresponding to different pressure values between the circuit board brush wires and the conducting ring. And finally selecting the optimal contact pressure to be matched with the direct-current resistance value.

The invention belongs to the field of electric appliance elements, and particularly provides a preparation method of a magnetic core integrated inductor, which comprises the following steps of: S1, adopting a silicon substrate as an initial substrate, and etching along the front surface of the initial substrate to form a graphical deep groove with a high aspect ratio; s2, filling metal in the patterned deep groove of the initial substrate to form a metal winding; s3, bonding the front surface of the initial substrate and the surface of the metal winding to the temporary substrate; s4, etching along the back surface of the initial substrate to remove the initial substrate, and transferring the metal winding to the temporary substrate; s5, a magnetic core material is filled to wrap the metal winding, and a magnetic core layer is formed; and S6, the bonding is removed to separate the temporary substrate, and the magnetic core integrated inductor is obtained and comprises a magnetic core layer and a metal winding embedded in the magnetic core layer. The magnetic core integrated inductor prepared through the method has the advantages of being high in inductance density and small in direct-current resistance, simultaneous batch preparation of a large number of metal windings can be achieved, batch production is easy, and array integration is easy.

The invention discloses a three-loop DC resistance tester calibration method based on abnormal data identification, and relates to the technical field of resistance tester calibration. The method comprises the following steps: deploying a plurality of acquisition points for a three-loop DC resistance tester, and acquiring test data through the plurality of acquisition points; wherein the test data comprises temperature, humidity, three-channel loop resistance, battery voltage and test current; determining a plurality of receiving points, building transmission channels between the acquisition points and the receiving points, and transmitting the test data based on the transmission channels; wherein a plurality of common transfer stations are arranged for the transmission channel; according to the invention, the accuracy, integrity and consistency of the test data acquired by the plurality of acquisition points can be ensured; according to the invention, the label output by the trained anomaly identification model can be ensured to be more accurate, and the three-loop DC resistance tester can be calibrated according to the accurate label, so that the calibration result is more accurate.

A dynamic arc extinguishing device of a transformer direct current resistance tester comprises a measuring circuit, an arc extinguishing circuit and an acquisition circuit. Wherein the arc extinction circuit is connected in series with the acquisition circuit and is connected in parallel with the measurement circuit; the measuring circuit is a conducting circuit when the direct current resistance tester works normally and is used for measuring the direct current resistance of the transformer winding; when the arc extinguishing circuit is used for disconnecting the switch and ending measurement, arc extinguishing is carried out on back electromotive force generated by a transformer winding so as to protect original circuits in the circuit; the acquisition circuit is used for acquiring real-time current and voltage of the arc extinction circuit and feeding back the real-time current and voltage to the single-chip microcomputer, and then adjusting voltage is output to grid voltage of the field effect diode through the digital-to-analog conversion module, so that the arc extinction current is adjusted, and the dynamic arc extinction function is achieved.

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 discloses a method, apparatus, terminal equipment, and storage medium for power equipment condition assessment, belonging to the technical field of power equipment operation assessment. The method involves: acquiring structured and unstructured data of the power equipment; wherein the structured data includes: insulation resistance, oil gas concentration, dielectric loss factor, and DC resistance imbalance coefficient; and the unstructured data includes: infrared thermographic images and ultraviolet discharge images; generating a first membership degree of the structured data to each condition category based on the structured data; generating a second membership degree of the unstructured data to each condition category based on the unstructured data; calculating a comprehensive membership degree for each condition category based on the first and second membership degrees; and taking the condition category with the highest comprehensive membership degree as the power equipment condition assessment result. This invention, based on structured and unstructured data, improves the accuracy of power equipment condition assessment.