403 results about "Capacitive measurement" patented technology

The invention relates to the field of motor health management and predictive maintenance, in particular to a motor stator winding insulation state evaluation method and system based on a digital model. Comprising the following steps: S1, collecting high frequency of a motor stator winding, and generating multi-physical-quantity real-time data; s2, calculating a dynamic capacitance reference value according to real-time data of multiple physical quantities; s3, performing subtraction operation on the high-frequency equivalent capacitance measurement value and the dynamic capacitance reference value, and extracting an insulation degradation residual signal; s4, constructing a self-adaptive dynamic detection threshold according to multi-physical-quantity real-time data; s5, judging whether the absolute value of the insulation degradation residual signal is greater than a self-adaptive dynamic detection threshold or not: if so, judging that an insulation degradation event occurs; if not, judging that the operation state is a normal operation state; and S6, in response to the insulation degradation event, updating the insulation degradation index, and generating insulation state evaluation based on the updated insulation degradation index. According to the invention, false alarm under severe load fluctuation is avoided, and the accuracy and reliability of evaluation are significantly improved.

The invention discloses a capacitive small six-dimensional force sensor, an optimization design method and a six-dimensional force decoupling method.The sensor comprises a three-T-shaped beam type elastic body, a lower electrode plate, an upper electrode plate and a base, the three-T-shaped beam type elastic body converts external six-dimensional force into displacement changes, the upper electrode plate is connected with the elastic body, the upper electrode plate and the lower electrode plate form six sets of opposite electrodes, and the three-T-shaped beam type elastic body is connected with the base. Comprising three groups of horizontally arranged electrodes and three groups of vertically arranged electrodes to form six groups of parallel plate capacitor structures. When the sensor is subjected to external force, deformation of the elastic body drives the upper electrode plate to generate displacement, a capacitance value is changed, and force information is converted into six capacitance signals to be output. The sensor is compact in design and small in size, and can be conveniently integrated into narrow spaces such as robot fingertips. Based on a capacitance measurement principle, the sensor has excellent dynamic response performance and can quickly respond to external force change. The sensor has high sensitivity, rigidity in all directions is consistent, the coupling effect of force is effectively reduced, and high-precision six-dimensional force decoupling is achieved by combining a decoupling algorithm.

The invention discloses an insulation resistance and capacitance measuring circuit and method based on monopulse double-edge analysis, and relates to the related field of the electrical insulation online monitoring technology, and the circuit comprises a detected object and an insulation detection circuit. The insulation detection circuit comprises a controlled pulse voltage source, a coupling resistance network, a current sensor, a switch control module, a signal modulation circuit and a processor. The measurement method implemented based on the circuit comprises the following steps: injecting a common-mode voltage pulse into a transmission line of the power transmission system by adopting a pulse transmitter; pulse current response is collected in real time, a current oscillogram is drawn, and a three-point sampling method is introduced to record a current value for insulation impedance parameter calculation; according to a load condition, a double-edge verification method is applied based on a pulse current attenuation characteristic, and insulation impedance parameters including a resistive component and a capacitive component are independently calculated by analyzing a pulse current rising edge and a pulse current falling edge. According to the invention, non-intrusive synchronous monitoring of resistive and capacitive components of line-to-ground impedance is realized, and the detection precision is improved.

Wireless circuitry is provided that includes a transformer having a primary coil and a secondary coil, a first group of switchable capacitors coupled to a first terminal of the primary coil, a second group of switchable capacitors coupled to a second terminal of the primary coil, and capacitance measurement circuitry selectively coupled to a center tap of the primary coil during a measurement mode. The capacitance measurement circuitry can include a current source, a current sink, a comparator, a voltage generator for providing one or more threshold / reference voltages to the comparator, a frequency measurement circuit, and a capacitance calculation circuit configured to compute a capacitance of the first and second groups of switchable capacitors.

A refillable liquid tip or cartridge for a vaping device includes a capacitive sensor plate located in a tip liquid reservoir. The liquid refilling device provides the liquid sucked from the refilling bottle to the vapour device; the refilling device comprises a capacitance measuring circuit; a microcontroller uses data from the capacitance measurement circuit to determine whether a liquid level in the tip liquid reservoir is above or below a threshold level, if below, activates a liquid pump in the refill device to draw liquid from the refill vial, and if not, activates a liquid pump in the refill device to discharge liquid from the refill vial. And pumping the liquid through the vapour device and up into the tip liquid reservoir. The pumping is stopped once the liquid reaches the threshold level.

The invention relates to a circuit arrangement (1) for multi-zone heating operation, comprising: a plurality of heating wires (2, 2 '), which can be supplied in parallel by a heating voltage, for heating a touch surface (19) comprising a plurality of zones (20, 20'); wherein a respective heating wire (2, 2 ') is associated with a zone (20, 20'); at least one first switching element (3a, 3a ') for each heating wire (2, 2'), which is coupled between the heating wire (2, 2 ') and one of the two different heating potentials (VH +, VH-) of the heating voltage in such a way that, in a heating mode, a heating current is applied to the respective heating wire (2, 2') in the conducting state of the first switching element (3a, 3a '), and interrupting the heating current in the OFF state of the first switching element (3a, 3a '); a control circuit (12, 6a, 6a ', 6b, 6b') configured to generate, for each heating wire (2, 2 '), individual pulse width modulated first control signals (ST1, ST1') to switch the first switching elements (3a, 3a ') between an on state and an off state, respectively, the individual pulse width modulated first control signals being applied to first control terminals (Ga, G'a) of the first switching elements (3a, 3a'), respectively; wherein the control circuits (12, 6a, 6a ', 6b, 6b') are further designed to apply a respective associated heating current to a plurality of heating wires (2, 2 ') in a common heating stage in parallel, in an overlapping manner and / or in an alternating manner, and wherein at least two of the first control signals (ST1, ST1') differ in terms of their duty cycles.

A capacitance measurement circuit includes an analog front-end (AFE) circuit with current mirror circuits, a parasitic capacitor, an AD converter, an output shift register, and a controller. The controller disconnects a capacitor to be measured and connects one current mirror circuit to record an AFE output voltage VN collected at an inverting input terminal of the AD converter, then connects the capacitor to be measured to collect an AFE output voltage VP at a non-inverting input terminal of the AD converter, and converts a value of (VP−VN) into a first digital signal; determines, based on the value of the first digital signal, a connection number m of the current mirror circuits, controls the analog front-end circuit to connect m current mirror circuits, and repeat the steps to obtain a second digital signal; and shift the second digital signal based on the connection number m to obtain a capacitance measurement value.

The invention discloses a battery cell anomaly detection method, a battery cell anomaly detection device and a battery cell manufacturing method. The battery cell anomaly detection method comprises the steps that a capacitance measurement value of a discharged battery cell after hot pressing treatment is obtained, the battery cell comprises a plurality of pole piece combinations, and each pole piece combination comprises a positive pole piece and a negative pole piece which are equivalent to an equivalent capacitor; and carrying out comparative calculation on the capacitance measurement value and a preset threshold value, and judging whether the pole piece distance between a positive pole piece and a negative pole piece included in the pole piece combination of the battery cell is abnormal or not according to a comparative result. According to the battery cell anomaly detection method, the capacitance measurement value of the discharged battery cell is obtained, comparison calculation is performed according to the capacitance measurement value, and whether the pole piece distance of the battery cell is abnormal or not can be judged according to the comparison result, so that screening monitoring of the pole piece distance of the battery cell in the manufacturing process of the battery cell is realized, the manufacturing quality risk of the manufacturing process is avoided, and the production efficiency is improved. Abnormal products are prevented from flowing out.

The invention relates to the technical field of flexible electronics and sensing, in particular to a capacitive flexible pressure sensor based on a barium titanate composite dielectric layer, which sequentially comprises a lower electrode layer, an upper electrode layer, a lower electrode layer and an upper electrode layer from bottom to top, the composite dielectric layer is arranged on the lower electrode layer and is formed by compounding an elastic polymer matrix and a high-dielectric-constant barium titanate (BaTiO3) filler; the upper electrode layer is made of a flexible conductive material and is arranged on the composite dielectric layer; the lower electrode layer and the upper electrode layer are connected with an external capacitance measuring circuit through wires. According to the sensor disclosed by the invention, the comprehensive performance of high sensitivity, wide detection range, low hysteresis and excellent cycle stability is realized by optimizing the shape of the barium titanate filler, surface modification and composite structure design.

The invention provides an excitation amplitude automatic closed-loop control system and method for a DLCP test. The system comprises a multi-frequency alternating current excitation and direct current bias voltage applying module which is used for automatically applying alternating current excitation signals and direct current bias voltage signals according to a preset excitation amplitude sequence under a plurality of test frequencies; the PID closed-loop control module is used for performing closed-loop correction on the applied voltage according to the response of the test port of the tested semiconductor device, so that the condition of the applied voltage at the test port meets a preset requirement; the capacitance measurement module is used for acquiring an equivalent capacitance response signal of the tested semiconductor device; the capacitance test data caching module is used for performing associated marking and classified caching on the capacitance test data according to the test frequency, the excitation level and the bias voltage set point; and the main control module is used for coordinating automatic test processes under the conditions of a plurality of test frequencies and different excitation amplitudes and outputting corresponding capacitance test data so as to improve the consistency, stability and automation degree of the DLCP test.

The invention relates to the technical field of semiconductor device measurement, and provides a semiconductor nonlinear output junction capacitance measurement method based on fitting iteration, and the method comprises the steps: firstly building a junction capacitance extraction circuit, collecting the turn-off transient waveform of a to-be-measured device through a test platform, extracting the oscillation frequency fexp through fast Fourier transform, and carrying out the measurement of the to-be-measured device; based on the relation between the oscillation frequency and the junction capacitance and parasitic parameters, the initial junction capacitance Coss is reversely deduced; then, fitting is carried out by adopting a hyperbolic tangent function, fitting parameters are optimized through a least square method, a preliminary junction capacitance Coss-test voltage udc relation curve under different voltage grades is obtained, an oscillation frequency simulation circuit is further built, simulation frequency fm is obtained, fm is compared with fexp, if deviation exists, the fitting curve is adjusted and iterative optimization is carried out, and the test voltage udc relation curve of the junction capacitance under different voltage grades is obtained. And ending until the error of two adjacent rounds of fitting results is lower than a set error threshold value, thereby obtaining a final accurate junction capacitance Coss-test voltage udc relation curve.

Embodiments of the present disclosure relate to an electronic device for determining an active state of a touch sensor comprising a capacitance measurement circuit to be coupled to the touch sensor, the touch sensor comprising a first electrode and a second electrode, the capacitance measurement circuit is configured to obtain a first measurement based on a self-capacitance of the first electrode and a second measurement based on a mutual capacitance between the first and second electrodes. The algorithm module is configured to apply an algorithm to the first and second measurements, thereby generating a result signal. The threshold comparator is configured to compare the result signal to a threshold and to generate a comparison signal having a first comparison value if the result signal is greater than the threshold and to generate a comparison signal having a second comparison value if the result signal is less than the threshold. The output module is configured to provide an output signal based on the comparison signal, wherein the output signal is indicative of an activation state of the touch sensor.

Described is a touch-sensitive apparatus for sensing the presence of an object relative to a touch-sensitive surface using capacitance measurements. The apparatus includes an electrode array comprising at least one electrode, the electrode array providing the touch-sensitive surface; a signal generating module for generating a time-varying drive signal to be applied to the electrode array; a differential amplifier comprising: a first input configured to receive a time-varying sensor signal from an electrode of the electrode array, the sensor signal indicative of a capacitive coupling associated with the at least one electrode; a second input configured to receive a time-varying reference signal; a first output configured to output a first output signal from the differential amplifier based on a difference between the time-varying sensor signal and the time-varying reference signal; and control circuitry configured to determine the presence of an object, wherein the apparatus further comprises a subtractor for subtracting a signal from the first output signal from the differential amplifier to generate a subtracted signal, wherein the control circuitry is configured to receive a signal based on the subtracted signal and to determine the presence of an object based on the received signal. Further disclosed is a method for sensing the presence of an object relative to a touch-sensitive surface using capacitance measurements of a touch sensitive apparatus.

A capacitance measurement circuit includes a charge to voltage converter (CVC) that includes at least one first variable capacitor, an excitation signal generation circuit, a differential amplifier, a first switch circuit, and at least one second variable capacitor, wherein a parasitic capacitance from a sensing capacitance sensed by a capacitance sensor is reduced by the at least one first variable capacitor. The excitation signal generation circuit is arranged to generate and connect a first excitation signal to the capacitance sensor, and generate and connect a second excitation signal to the at least one first variable capacitor, wherein the first excitation signal and the second excitation signal are out-of-phase, and a voltage amplitude of the first excitation signal is different from a voltage amplitude of the second excitation signal. The inverting input terminal of the differential amplifier is arranged to receive the sensing capacitance from the capacitance sensor.

The invention belongs to the technical field of nuclear power, and particularly relates to a ground capacitance measurement method based on series capacitance and high-frequency signal injection. In order to solve the problem that a traditional signal injection method cannot accurately calculate the ground capacitance level of a power distribution network, the invention provides a ground capacitance measurement method based on a series capacitor and high-frequency signal injection. The leakage inductance of the voltage transformer is accurately measured by injecting the high-frequency signal, so that a resonance point is convenient to find during frequency sweeping, and the resonance point measured during frequency sweeping is more accurate.

The present invention relates to the technical field of ship fuel tank monitoring, and discloses a sensor for measuring the liquid level position in a ship fuel tank and a working method thereof, that is, the sensor comprises a mounting mechanism, a protective tube, a rectangular partition, a first capacitance measuring probe, a second capacitance measuring probe and a processing module, the second capacitance measuring probe is wrapped by an insulating layer and the bottom end position of the second capacitance measuring probe is lower than the bottom end position of the first capacitance measuring probe, so that after the sensor is installed, based on conventional capacitance detection and liquid level height measurement principles, according to the fitting function of calibration data and two capacitance measurement values ​​collected and obtained by two capacitance measuring probes of different lengths, the fuel liquid level position and the oil-water interface position corresponding to the two capacitance measurement values ​​can be determined, so as to achieve the purpose of monitoring the water intrusion on the bottom of the tank and measuring the fuel level at the same time, thereby improving the safety of ship operation and the anti-damage management capability, and is particularly suitable for use in the field of unmanned ships.

A re-fillable liquid tip or pod for a vaping device that includes capacitive sensor plates in the tip liquid reservoir. A liquid re-filling device provides liquid to the vaping device, drawn from a refill bottle; the re-filling device includes a capacitance measuring circuit; a microcontroller uses the data from the capacitance measuring circuit to determine if the level of liquid in the tip liquid reservoir is above or below a threshold level; if below, then a liquid pump in the re-filling device is activated to draw liquid from the refill bottle and pump it through the vaping device and up into the tip liquid reservoir. Pumping ceases once the liquid reaches the threshold level.

In a steering wheel unit, when any one of electrostatic capacitances measured by a capacitance measurer while a self capacitance detection mode is set by a mode switcher is equal to or larger than a first threshold value, it is determined that the operator's hand is in contact with a rim at a position that overlaps at least one of electrodes. When the electrostatic capacitance is equal to or larger than a second threshold value, which is smaller than a first threshold value, and smaller than the first threshold value, the mode is switched to the mutual capacitance detection mode. After the switching, when an electrostatic capacitance newly measured in the mutual capacitance detection mode is equal to or larger than a third threshold value, it is determined that the operator's hand is in contact with the rim at a position that overlaps a gap between the electrodes.

The present invention provides a parallel binary model for measuring a capacitance value of a gate oxide layer of a gate oxide MOS device. The parallel binary model is a parallel circuit model formed through parallel connection of a parallel capacitor Cp and an equivalent resistor Rp. The parallel binary model is used to measure the gate oxide MOS device through an LCR meter by adopting frequency f1 to obtain parallel capacitance Cp1 and parallel conductance Gp1. A dissipation factor D1 is calculated. In a case that D1<0.1, the measured parallel capacitance Cp1 is the capacitance value of the gate oxide layer of the gate oxide MOS device. In a case that D1>0.1, the parallel binary model is used to measure the gate oxide MOS device through the LCR meter by adopting frequency f2 to obtain parallel capacitance Cp2 and parallel conductance Gp2.

A measuring system for characterizing a multilayered structure with layer-by-layer different ohmic properties, having a sensor module, an electrical switching device, and a measuring electronics unit. The sensor module has more than two planar coils arranged in a stack, and the electrical switching device is contacted with the planar coils and is configured to connect these coils to the measuring electronics unit such that the coils are switchable between a measuring configuration and a reference configuration. In the measuring configuration, the planar coils at least partially form an optionally inductive or capacitive measuring sensor, with the detection area extending outside the sensor module for determining a property of a low and / or high-resistance layer of the structure. In the reference configuration, the planar coils at least partially form an optionally inductive or capacitive reference sensor, with the detection area extending essentially inside the sensor module for determining a sensor module property.

The invention provides a resistor and capacitor measuring circuit and method, and relates to the technical field of resistor and capacitor measurement, and the resistor and capacitor measuring circuit comprises a switch S1, a switch S2, a switch S3, a switch S4, a switch S5, a switch S6, a reference capacitor CREF, a capacitor CTEST to be measured, a reference resistor RREF, a resistor RTEST to be measured, a Schmitt trigger u1, a time-to-digital converter TDC and a microprocessor muC. And the Schmitt trigger u1, the time-to-digital converter TDC and the microprocessor muC are sequentially connected in series. According to the resistor-capacitor measuring circuit and method, the discharge time of the reference resistor-capacitor and the discharge time of the resistor-capacitor to be measured are respectively measured through the time-to-digital converter, the time proportion is calculated, and the parameters of the resistor-capacitor to be measured and the resistor-capacitor to be measured are calculated and reversely deduced by combining the known reference capacitor and the resistor. The correction compensation amount is obtained through an additional measurement state, and then the measurement result is corrected, so that the influence of the conduction loss of the switch on the measurement result is greatly reduced.

The invention discloses a low-temperature safety valve leakage detection device based on electrical capacitance tomography, which comprises a liquid nitrogen storage container, a test container, a low-temperature stop valve, a detected low-temperature safety valve, a constant-temperature water bath device, a flow meter, a water tank, a leakage detection pipeline, a capacitance measurement system and a data acquisition and software system, the capacitance measuring system comprises a plurality of groups of copper electrode plates and a processing module, each group of copper electrode plates comprises two copper electrode plates arranged on two opposite side parts of the water tank, and the copper electrode plates are used for capturing bubbles formed by the low-temperature gas in the cavity and acquiring capacitance signals; and the copper electrode plate is electrically connected with the data acquisition and software system through the lead electrode plate connector and the shielding coaxial cable. Insulation supports are arranged between the water tank and the copper electrode plates, the interior of the water tank is divided into a plurality of cavities, and communication gaps are formed between the adjacent cavities. The invention further discloses a low-temperature safety valve leakage detection method based on electrical capacitance tomography. According to the method, the accuracy and comprehensiveness of calculating the leakage rate of the low-temperature gas are improved.

Systems and methods are provided herein for determining the planarity of a semiconductor wafer. The systems and methods described herein utilize a capacitive measurement tool to detect and characterize the bow of a semiconductor wafer. The capacitive measurement tool disclosed herein utilizes a non-contact, capacitive sensor unit to measure wafer bow. Unlike conventional capacitive sensing techniques used to measure wafer bow, the capacitive sensor unit disclosed herein uses a plurality of electrodes for simultaneously obtaining a plurality of capacitance measurements from the wafer at various locations on the wafer surface. By including a plurality of electrodes within the capacitive sensor unit, the techniques described herein increase the amount of data collected across the wafer surface at any given time to improve the throughput and measurement accuracy of the capacitive measurement tool.

The application discloses a self-adaptive capacitive liquid level sensor, which comprises a metal cylinder, a PCB circuit board, a reference electrode and a measuring electrode which are arranged on the PCB circuit board and are insulated from each other, the reference electrode is arranged at the bottom end of the PCB circuit board and is used for forming a reference capacitor with the metal cylinder, the measuring electrode is arranged above the reference electrode and is used for forming a measuring capacitor with the metal cylinder, and a controller is arranged for calculating the liquid level height after compensating the measuring capacitor by the reference capacitor. The capacitive liquid level sensor is provided with the reference electrode and the corresponding algorithm steps, so that the calculation of the liquid level height is irrelevant to the dielectric constant of the medium, thereby avoiding the detection error caused by the change of the dielectric constant, and the sensor can be applicable to the liquid level detection of different oil products in different environments.

A washing machine comprises a drum for laundry in a tub, a pressure measuring device for measuring a pressure difference due to a varying water level in the tub, and a hose conduit from the treatment chamber to the pressure measuring device. The pressure measuring device comprises a pressure measuring chamber with variable volume, said variable volume being caused through a flexible chamber wall, a carrier for the pressure measuring chamber, a movable part on the flexible chamber wall, a spring means between the movable part and the carrier to push the movable part together with the flexible chamber wall away from the carrier, and measuring means adapted to determine a distance between the movable part and the carrier or to determine a change in this distance. The measuring means are designed for an optical measurement or a capacitive measurement.

A capacitance measuring circuit includes a charge-to-voltage converter including at least one first variable capacitor, an excitation signal generating circuit, a differential circuit, a first switching circuit, and at least one second variable capacitor. Wherein a parasitic capacitance value in a sensing capacitance value sensed by a capacitance sensor is reduced by at least one first variable capacitance. The excitation signal generating circuit is used for generating and connecting a first excitation signal to the capacitive sensor and generating and connecting a second excitation signal to the at least one first variable capacitor, the first excitation signal and the second excitation signal are opposite in phase, and the voltage amplitude of the first excitation signal is different from that of the second excitation signal. The inverted input end of the differential amplifier is used for receiving a sensing capacitance value from the capacitance sensor.

The invention relates to a circuit board backdrill capacitance testing method, device and equipment and a storage medium, and the method comprises the steps: obtaining a capacitance detection instruction, and obtaining the image information of a to-be-detected circuit board according to the capacitance detection instruction; carrying out clustering analysis on the image information of the to-be-detected circuit board by adopting a k-means algorithm to obtain a feature image of the to-be-detected circuit board, and carrying out analysis according to the feature image to obtain a displacement distance and an angle of the probe; adjusting the position of the probe according to the displacement distance and the angle of the probe, and generating a capacitance measurement message after the adjustment of the probe is completed; according to the capacitance measurement message, calculating a capacitance value of the circuit board to be detected through a capacitance method, and comparing the capacitance value of the circuit board to be detected with a preset capacitance value to obtain a capacitance comparison result; and generating a quality evaluation result of the back drilling hole of the circuit board according to the capacitance comparison result, and transmitting the quality evaluation result of the back drilling hole of the circuit board to the user side. The method has the effect of improving the precision and efficiency of back drilling hole quality detection.

The invention discloses a resistance-capacitance dual-purpose ERT sensor LVF measurement method and system, and the method comprises the steps: employing an ERT sensor, obtaining electrical impedance data through measurement in an ERT mode, and reflecting the conductivity distribution of a fluid; in the capacitance mode, dielectric constant distribution is measured and obtained. And carrying out normalization processing on the electrical impedance and the capacitance value. And constructing a multi-input single-output MISO moisture content calculation model based on electrical impedance and capacitance measurement values, and fitting and solving model parameters through experimental data. The model is used for calculating the moisture content in the gas-water two-phase flow according to actual measurement data. Through the addition of the capacitance measurement module, the dual detection capability of non-conductive and conductive media is realized, and the accuracy of moisture content measurement is improved. A statistical analysis technology is adopted, a combination strategy of measured values is optimized, an MISO model is constructed, and error minimization between the measured values and actual values is achieved. The method is high in adaptability, can be quickly applied to industrial sites, and provides a stable and efficient solution for monitoring the water content of the gas-water two-phase flow in real time.

The invention relates to a sensor arrangement (50) comprising a strain sensor (10) and a capacitive proximity sensor. The strain sensor (10) is configured to detect deformation of a component to which it is connected. The proximity sensor is configured to detect an operator's approach to the proximity sensor based on a measurement of the intrinsic capacitance of a measuring electrode. The strain sensor (10) forms the measuring electrode of the capacitive proximity sensor. The invention also relates to the use of a strain sensor (10).

The invention discloses a machine learning icing recognition system and method for a skymirror system, and relates to the technical field of measurement, and the method comprises the following steps: S1, transmitting an optical signal to an ice layer, and judging the type of the ice layer based on the features of the returned optical signal; s2, acquiring an ice layer capacitance value, and calculating the thickness of the ice layer according to the capacitance value; s3, acquiring an image containing a water body, a sensitive zone at the junction of the water and the ice layer and the ice layer, and calculating the thickness of the sensitive zone according to image features and optical signal features; s4, acquiring the signal-to-noise ratio of the capacitance measurement data, determining a first weight coefficient according to the signal-to-noise ratio, and determining a second weight coefficient according to the contrast ratio of the image; and S5, performing weighted fusion on the capacitance measurement thickness and the image thickness based on the first weight coefficient and the second weight coefficient to obtain the corrected ice layer thickness. According to the invention, through multi-sensor data fusion, weight dynamic distribution and construction of prediction modeling, the problems of ice type identification, thickness measurement and growth law prediction are solved.