505 results about "Equivalent capacitance" 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 clamping type multi-level converter and a control method, relates to the field of clamping, and aims to enable the voltage of a flying capacitor in the multi-level converter to be 1 / (N-1), 2 / (N-1)... (N-2) / (N-1) times of Vbus voltage (bus voltage) even if the voltage of the flying capacitor is in a steady state. The number of the clamping units is the same as that of the flying capacitors, and each flying capacitor is connected in series with the equivalent capacitors of the corresponding number of bus capacitors through the corresponding clamping unit when the multi-level converter switching tube is closed, so that each flying capacitor is clamped through the voltage of the corresponding number of equivalent bus capacitors; and the voltage of the flying capacitor in the multi-level converter can be ensured to be in a steady state without closed-loop control.

Provided is a resonant converter capable of adaptively tuning a quality factor based on load. The resonant converter includes a resonant tank having an inductor part whose inductance is tunable according to a first control potential, a magnetizing inductor, and a capacitor part whose capacitance is tunable according to a second control potential. The resonant converter detects the rectifying current of its output stage for responding to the load state of the resonant converter. The resonant converter outputs the first and second control potentials in response to the load state, tuning the equivalent inductance of the inductor part, the equivalent capacitance of the capacitor part, or both, thereby changing the quality factor of the resonant converter.

The invention relates to the technical field of water level monitoring, in particular to a distance detection method and system of a water level sensor, a medium and equipment. The scheme comprises the following steps: arranging a non-contact distance capacitance change detection structure; calculating the equivalent volume value of the cross-air water level; setting a reference capacitance value according to the change condition of the equivalent capacitance value; setting the change relation between the height change of water and the equivalent capacitance through linear fitting according to the reference capacitance value; according to the change relation between the water height change and the equivalent capacitance, the equivalent capacitance is collected in real time, and the water level height is obtained through calculation; and according to the water level height, displaying the currently acquired water level acquisition value in real time. According to the scheme, a water level non-contact measurement method and a calculation method are designed, and online water level detection and display are achieved.

The invention discloses an ultra-large octave wave absorber based on a photoconductive material, and belongs to the field of electromagnetic metasurfaces and metamaterials. Comprising a light response wave-absorbing metasurface and a light driving module capable of projecting different patterns on the surface of the light response wave-absorbing metasurface, array wave-absorbing units of different sizes are obtained on the light response wave-absorbing metasurface by switching the projected patterns, and impedance of a target frequency band is matched by changing equivalent capacitance / inductance of a wave-absorbing unit structure; the light driving module can project a preset light pattern on the light response wave-absorbing metasurface, so that the equivalent impedance distribution of the light response wave-absorbing metasurface is changed; according to the light response wave-absorbing metasurface, the conductivity distribution of the metasurface units is changed through light control, and the wave-absorbing frequency band is adjusted in real time, that is, dynamic adjustment of the wave-absorbing performance is achieved through non-contact light control. According to the invention, the limitation of narrow bandwidth and passive fixation of a traditional wave absorber is broken through, and electromagnetic wave control with ultra-large octave, high absorptivity and real-time reconfigurability is realized.

The invention relates to the technical field of power electronics, in particular to a DC deicing current oscillation suppression method and system, and the method comprises the steps: obtaining an equivalent inductance value and an equivalent capacitance value according to the operation environment data of a DC deicing system; according to the equivalent inductance value and the equivalent capacitance value, when the current state of the direct current deicing system does not meet the current oscillation suppression condition, generating a valve group control optimization strategy based on the equivalent inductance value and the operation environment data; extracting current oscillation characteristic data according to the current waveform data and determining the ice melting efficiency according to the current oscillation characteristic data in the process of controlling the direct current ice melting system to execute ice melting operation through the valve group control optimization strategy; and when the ice melting efficiency does not reach the standard, optimizing the valve group control optimization strategy by using the current oscillation characteristic data and a multi-objective optimization algorithm, and outputting an optimal ice melting control strategy. By dynamically optimizing the valve group control strategy, the ice melting efficiency is considered while the current oscillation is suppressed, and the stable operation of the direct current ice melting system is ensured.

The invention discloses a Beidou anti-interference antenna array which comprises an antenna array, a decoupling metasurface and an antenna cover. The decoupling metasurface is located between the antenna array and the antenna housing, the antenna array comprises a plurality of antenna array elements, and the plurality of antenna array elements are arranged and printed on a whole PCB to form the antenna array; the decoupling metasurface comprises a plurality of basic structure units which are periodically arranged, each basic structure unit is a bent line annular printed circuit, a basic structure unit equivalent inductor L and a gap equivalent capacitor C between the two basic structure units, and LC resonance can be achieved to block propagation of electromagnetic waves in the plane direction, namely a mutual coupling transmission path is blocked. According to the invention, through the design of the decoupling metasurface, the mutual coupling of the miniaturized Beidou anti-interference antenna array is reduced, and the improvement of the isolation between Beidou anti-interference antenna array elements is realized.

The invention provides a plasma degumming machine and an ignition method. The plasma degumming machine comprises a Faraday cylinder, a quartz cylinder, an inductance coil and an ignition device, and the top wall of the Faraday cylinder is grounded; the quartz cylinder is arranged in the Faraday cylinder and forms a plasma cavity; the inductance coil is wound on the periphery of the Faraday cup and is used for receiving a high-voltage high-frequency signal; the ignition device is connected to the inductance coil and forms equivalent capacitance with the inductance coil and / or the Faraday cup; wherein the equivalent capacitor is used for coupling high frequency and high voltage from the inductance coil, high field intensity used for ionizing gas is formed in the plasma cavity based on discharge of the equivalent capacitor, and the ignition device conducts the top wall and / or the side wall of the Faraday cup along with increase of the density of plasma obtained by continuous ionization of the gas in the plasma cavity. The plasma degumming machine provided by the invention can realize rapid ignition, and the ignition device can be automatically grounded after ignition. The invention further provides an ignition method based on the plasma degumming machine.

The invention relates to the technical field of vibration sensors, and discloses a high-precision vibration spectrum sensor, which comprises a shell, a sealing cover is embedded in the shell, the top of the sealing cover is flush with the top of the shell, and the shell and the sealing cover form a closed space; and the sensor mechanism is arranged in an inner space defined by the shell and the sealing cover, the sensor mechanism comprises an insulating cylinder, the outer wall of the insulating cylinder is fixedly connected with a connecting block, the insulating cylinder is fixedly connected to the inner wall of the shell through the connecting block, and the interior of the insulating cylinder is fixedly connected with a first electrode plate and a second electrode plate. The sensor is excellent in detection performance and capable of accurately capturing vibration signals, the core component is made of high-quality materials, the spring wire is stable in elasticity and resistant to corrosion, the ball body responds to high-frequency vibration rapidly, the electrode plates reduce signal loss, vibration is converted into electric signals through equivalent capacitance changes, various curves can be generated, early fault features can be recognized in an assisted mode, and the detection accuracy is improved. And the detection accuracy and completeness are ensured.

The invention discloses a method for monitoring the insulation state of a stator winding of an injection unit based on neutral point harmonic frequency sweeping. The invention provides an active online monitoring method based on harmonic injection for stator winding insulation of a full-power variable-speed pumped storage unit. A common-mode loop is constructed for a motor stator winding of a network side transformer neutral point ungrounded system through a motor neutral point grounded transformer, and therefore online monitoring of the insulation state of a motor stator is achieved. In order to solve the measurement problem of the full-power variable-speed pumped storage unit under the large-current working condition, a neutral point outgoing line current detection technology is adopted. A machine end large current interference area is avoided, monitoring is carried out on the primary side of the grounding transformer, transmission errors are avoided, and the measurement precision and reliability of insulation monitoring signals are remarkably improved. According to the invention, harmonic injection is carried out by avoiding an inherent common-mode component of a unit, a monitorable leakage current signal is enhanced, and the accuracy of insulation equivalent capacitance calculation is ensured.

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 discloses a state of health (SOH) prediction method for a super-capacitor system, and the method comprises the steps: obtaining a plurality of pieces of discharge segment data according to the historical charge and discharge data of the super-capacitor system under a real operation condition; identifying equivalent parameters of the data of each discharge segment through a resistance-capacitance equivalent model to obtain equivalent capacitance corresponding to each discharge segment; carrying out capacitance value calibration according to the equivalent capacitance corresponding to each discharge segment so as to obtain capacitance value labels of different historical preset time periods; constructing an SOH track smooth curve according to the capacitance value labels of different historical preset time periods; performing prediction model training according to the SOH trajectory smooth curve to obtain an SOH prediction model; and predicting the health state of the super-capacitor system by using the SOH prediction model. The method can accurately predict the health state of the supercapacitor system in the electrified traffic system carrying tool and the renewable energy system in actual operation, and improves the operation safety and economic benefits of the electrified traffic system carrying tool and the renewable energy system.

The invention relates to an annular ultra-wide frequency selective surface unit based on a liquid crystal material and an antenna. The annular ultra-wide frequency selective surface unit sequentially comprises a first dielectric layer, a first metal tuning patch layer, a liquid crystal substrate, a second metal tuning patch layer and a second dielectric layer from top to bottom, on the X frequency band, the first metal tuning patch layer is inductive, the second metal tuning patch layer is capacitive, the sizes of patches in the first metal tuning patch layer and the second metal tuning patch layer are changed, so that the interaction of equivalent inductance and equivalent capacitance between the patches is tuned, the band elimination function is achieved, the liquid crystal substrate is equivalent to a variable capacitor, and the band elimination function is achieved. The dielectric constant is changed through the electric adjustable characteristic, so that the coupling capacitance of the liquid crystal substrate is changed, and the dynamic adjustment of the resonant frequency is realized. The broadband airborne stealth radar antenna effectively solves the problems that a traditional airborne radar antenna is small in bandwidth and tuning range, and meets the development requirements of a miniaturized and integrated broadband airborne stealth radar antenna.

The embodiment of the invention relates to the technical field of transformer fault detection, and discloses a transformer winding fault detection method and system based on frequency response and a medium, and the method comprises the steps: determining the equivalent inductance and equivalent capacitance of a transformer winding; and calculating a first-order grounding coefficient of driving point admittance by using the peak frequency and the valley frequency when the neutral point is grounded, and calculating a first-order open-circuit coefficient by using the peak frequency and the valley frequency when the neutral point is open-circuit. A first difference function is constructed through the equivalent inductance, the scaling rate and the first-order grounding coefficient, and a second difference function is constructed through the equivalent capacitance and the first-order open circuit coefficient. And fault detection of the transformer winding is carried out according to a comparison condition between fluctuation of the first difference function and the second difference function and a preset threshold value, and early sensitive detection is realized.

The invention discloses a touch product triggering device, which is applied to the technical field of capacitive touch and comprises a protection electrode, a capacitive sensor and an MCU (Microprogrammed Control Unit). The protection electrode provides a potential equal to the capacitance type sensor and transmits a sensed first signal representing the equivalent self-capacitance change of the protection electrode to the MCU, and the capacitance type sensor only detects the change of the equivalent capacitance of the capacitance type sensor and transmits a second signal of detection data to the MCU. And the MCU judges whether a touch function is triggered or not according to the first signal and the second signal. When water drops drop on the touch surface of the touch product, the protection electrode and the capacitive sensor have the same potential, and the water drops and the environment have the same potential, so that the influence of the water drops on the change of the equivalent capacitance of the capacitive sensor can be nearly ignored. Meanwhile, the condition for triggering the touch product is comprehensively judged based on the detection results of the first signal and the second signal, and the problem of mistaken touch caused by the fact that conductors such as water drops drop on the capacitive touch product is further avoided.

The invention provides a method and device for determining the health state of a supercapacitor, and relates to the technical field of supercapacitors, and the method comprises the steps: obtaining the voltage variation and the current variation of the supercapacitor in the operation process; determining a target equivalent resistance value according to the voltage variation and the current variation; determining a target equivalent capacitance value according to the voltage variation and the current value in the corresponding time period; determining a resistance growth rate and a capacitance attenuation rate according to the target equivalent resistance value and the target equivalent capacitance value; and determining the health state of the supercapacitor according to the resistance growth rate and the capacitance attenuation rate. Therefore, the capacitance attenuation rate and the ESR growth rate can be extracted online based on the voltage data and the current data acquired in real time without interrupting the system or adding the test current in the equipment operation process, the process is simplified, and the accuracy and the reliability of determining the health state of the supercapacitor are also improved through the real-time data.

The utility model discloses a response bandwidth measuring device of a capacitive tip clearance measuring system based on an analog switch, the capacitive tip clearance measuring system is composed of a capacitive sensor, a measuring system host and an upper computer which are connected in sequence, and the measuring system host comprises a signal demodulation module and an acquisition module. The capacitive sensor consists of a sensor probe and a three-coaxial cable which are connected with each other; the response bandwidth measuring device replaces the sensor probe and is connected with the tri-coaxial cable through an SMA connector, and the response bandwidth measuring device adopts an analog switch to simulate capacitance change caused by the fact that the tip of the rotating blade sweeps the sensor probe and simulate input of the capacitive tip clearance measuring system; the response bandwidth measuring device is composed of an analog switch, a first capacitor C1 and a second capacitor C2, the analog switch is connected with the first capacitor C1 in series after being connected with the second capacitor C2 in parallel, and the analog switch is simplified into a single-pole double-throw switch S and an equivalent capacitor Cs (off).

A power supply includes a noise suppression circuit, an active power factor correction circuit, an active clamp flyback conversion circuit, a voltage-stabilizing feedback compensation circuit, and a control circuit. The active power factor correction circuit and the active clamp flyback conversion circuit convert an AC voltage into an output voltage for driving a load. The voltage-stabilizing feedback compensation circuit performs voltage-stabilizing feedback compensation to the output voltage. The active clamp flyback conversion circuit switches its operational mode based on the instantaneous output loading of the power supply. The control circuit controls the operation of the voltage-stabilizing feedback compensation circuit based on the operational mode of the active clamp flyback conversion circuit, thereby adjusting the equivalent capacitance of the voltage-stabilizing feedback compensation circuit for providing a corresponding voltage-stabilizing feedback compensation range associated with the instantaneous output loading of the power supply.

The invention relates to an offshore wind power tower tube corrosion detection method and system based on a microprobe technology, and the method comprises the following steps: placing a microprobe corrosion detection device on a to-be-detected offshore wind power tower tube, and setting a probe interval between a signal transmitting probe and a signal receiving probe according to the thickness of an anticorrosive coating of the offshore wind power tower tube and the corrosion condition; in the process that the microprobe corrosion detection device moves on the offshore wind power tower drum to be detected, the signal emission probe emits an alternating current signal according to a preset frequency, and the emitted alternating current signal is propagated by taking the anti-corrosion coating as a medium and penetrates through the coating to enter the main body steel structure; the emitted alternating current signal is transmitted in the main body steel structure and then returns to the signal receiving probe through the anti-corrosion coating; the alternating current signals collected by the signal receiving probe are analyzed, metal resistance and capacitance effect equivalent capacitance values of the main body steel structure in the offshore wind power tower are obtained, and the corrosion conditions of the main body steel structure and the anticorrosive coating of the offshore wind power tower are judged according to the obtained metal resistance and equivalent capacitance values.

The invention discloses an electric aircraft power load controller system and a working method thereof, and belongs to the technical field of electric aircraft controllers, and the electric aircraft power load controller system comprises a main power module, a pre-charging module, a discharging module, a monitoring control module, a power supply module, a communication module and a terminal. Through the mode, the solid-state power switch and the high-power mechanical switch are connected in parallel, and the control time sequence of the two switches is set, so that the high-voltage high-power electric load circuit can be suitable for the application scene of a high-voltage high-power electric load of an electric aircraft, and has good capacitive load adaptability and electric arc protection performance; and controllable pre-charging of the equivalent capacitance of the high-voltage line is realized by controlling the semiconductor power switch by utilizing the impedance characteristic of the semiconductor power switch in the saturation region through the pre-charging module, so that the complexity and the weight of equipment are reduced.

A circularly polarized antenna includes a plurality of radiation units configured in a rotational symmetry manner, and a feed network connected to the plurality of radiation units. Each radiation unit comprises a patch element and a short circuit wall which is connected with the patch element and is suitable for enabling the patch element to be short-circuited. Different from the traditional sequential phase feed, the sequential phase feed only depends on the physical length of the delay line to realize the phase change, and the reactance loading feed line ingeniously utilizes the equivalent capacitance and inductance to change the phase. The method does not need to depend on a long delay line, and stable phase difference can be realized in a wide frequency band.

The invention relates to the technical field of circuit board detection, in particular to a printed circuit board drilling quality detection method and device, and the method comprises the steps: injecting sinusoidal current signals with preset frequencies into a plurality of test points of a to-be-detected drilling region of a printed circuit board, extracting impedance values under each frequency component, and calculating the drilling quality of the printed circuit board; constructing an equivalent impedance spectrum containing a real part and an imaginary part according to the impedance value; according to the interlayer structure and the equivalent impedance spectrum of the printed circuit board, calculating equivalent resistance and equivalent capacitance of the drilling area to be measured to form a characteristic parameter set; comparing the data of each grid point in the characteristic parameter set with a preset threshold value, and integrating the grid points exceeding the preset threshold value to generate a defect state mark; and performing electrical topology constraint on the defect state mark to generate a defect positioning result. According to the invention, hidden defects in the drill hole and interlayer structures can be deeply detected, the electrical performance of the drill hole can be comprehensively evaluated, and accurate defect positioning and state marking can be provided.

The embodiment of the invention provides a packaging chip, a radio frequency communication module and communication equipment, and is applied to the technical field of semiconductor packaging. The package chip includes a wafer. The packaging chip further comprises at least one first attenuation element and at least one first tuning element, the first attenuation element is an equivalent capacitor or an equivalent resistor, and the first tuning element is an equivalent capacitor, an equivalent inductor or an equivalent resistor. Wherein the wafer is provided with a filtering structure, and the filtering structure comprises a first filtering resonance structure. The at least one first attenuation element is connected with the first end and the second end of the first filtering resonance structure so as to form a parallel structure with the first filtering resonance structure. The first end of each first tuning element is connected to a transmission path formed by the first end and the second end of the first filtering resonance structure and the at least one first attenuation element, and the second end of each first tuning element is grounded. According to the embodiment of the invention, the suppression degree and / or isolation degree of the filter device are / is greatly improved on the basis of not increasing the signal insertion loss.

The invention discloses a harmonic and super-harmonic measuring system and measuring method based on the CVT capacitive current principle, and belongs to the technical field of harmonic and super-harmonic measurement. According to the method, capacitive current analog signals on a voltage dividing capacitor C1 and a voltage dividing capacitor C2 are collected, the capacitive current analog signals are transmitted to a harmonic and super-harmonic measuring device, and the harmonic and super-harmonic measuring device measures the harmonic and super-harmonic. And the harmonic and super-harmonic measuring device is used for restoring a primary side total voltage waveform based on the capacitance current analog signal, the equivalent capacitance of the voltage dividing capacitor C1 and the equivalent capacitance of the voltage dividing capacitor C2. Influences of internal inductance and capacitance equivalent resistance of the capacitive voltage divider are considered, a primary side voltage reduction formula of the capacitive current method is corrected, and the corrected capacitive current method is suitable for ultra-harmonic measurement.

The invention discloses a voltage transformer intelligent inductance adjustment verification method and device based on a current inversion capacitor, and the method comprises the steps: obtaining a preset excitation voltage and an adjustable sweep frequency, and carrying out the sweep excitation of an inductance adjustment resonant circuit according to the preset excitation voltage and the adjustable sweep frequency; acquiring current sampling data of the inductance-adjusting resonance circuit; performing frequency domain analysis on the current sampling data, and calculating an equivalent capacitance value and a resonance state parameter of the inductance-adjusting resonance circuit according to a frequency domain analysis result; and the air gap length and the winding turns of the reactor are adaptively adjusted based on the resonance state parameters. The capacitance value and the resonance state parameter of the resonance circuit are calculated through inversion of the current frequency domain analysis result, dual-mode inductance adjustment closed-loop control is achieved based on the capacitance value and the resonance state parameter, the problems that an existing manual inductance adjustment mode depends on artificial experience and is tedious in operation and low in efficiency are solved, the method can adapt to a high-capacity mutual inductor, meanwhile, a resonance point is accurately locked, and the control precision is improved. And wide-range and high-precision inductance adjustment is realized.

A three-phase wireless electric energy transmission device disclosed by the present invention comprises a three-phase inverter, a three-phase switch capacitor, a coil magnetic field coupling structure and a rectifier, the coil magnetic field coupling structure comprises a primary coil and a secondary coil which are arranged in mirror symmetry, the primary coil is provided with two layers, each layer comprises a three-phase coil, each phase coil occupies a 120-degree angle range of the circumference, and the rectifier is connected with the primary coil and the secondary coil. The two layers of coils form a staggered angle, each phase of switched capacitor of the three-phase switched capacitor comprises a first capacitor branch and a second capacitor branch which are arranged in parallel, the first capacitor branch is provided with a first capacitor, and the second capacitor branch comprises a second capacitor and a switch module which are arranged in series; the switch module adjusts the equivalent capacitance value of the second capacitor branch through the duty ratio and adjusts the transmission power of the three-phase wireless power transmission device. The invention further discloses a load power adjusting method of the three-phase wireless power transmission device, the transmission efficiency can be kept unchanged within the adjusting range, and soft switching can be achieved within the adjusting range.

The invention relates to the technical field of crystal growth, and discloses a method and a system for electrochemical in-situ characterization of crystal growth interface area change, and the method comprises the following specific steps: in a crystal growth process by a Czochralski method, measuring impedance between a seed crystal and a crucible containing a melt in real time to obtain an electrochemical impedance spectrum at the growth stage; performing equivalent circuit fitting on the measured electrochemical impedance spectrum to obtain fitting parameters of a corresponding circuit element and calculating equivalent capacitance of a growth interface of the electrochemical impedance spectrum; and calculating the crystal growth interface area through a parallel plate capacitor model based on the equivalent capacitance value. The method solves the problem that the prior art is not suitable for monitoring the crystal growth interface, and has the characteristics of high precision, nondestructive detection, no influence on crystal growth, simple process and controllable cost.

The invention discloses sensing skin for a protection robot and a sensing method. The sensing skin comprises sensing skin wrapping the outer side of a mechanical arm and a controller electrically connected with the sensing skin. The induction method comprises the steps that an alternating electric field with the frequency being 10-100 kHz and the voltage being 5-30 V is applied to an electrostatic induction unit array on a flexible base layer of the mechanical arm, and capacitance change signals of electrostatic induction units are collected; a programmable gain amplifier is used for amplifying capacitance change signals, interference is eliminated through digital filtering, digital sampling is conducted through an analog-to-digital converter, based on the processed capacitance change signals, the human body approaching distance is calculated through an equivalent capacitance model, a danger level evaluation model is established, and early warning signals are sent out based on the evaluation result. According to the method, the safety performance of the industrial robot can be effectively improved, reliable safety guarantee is provided for man-machine cooperation, and the method has wide application prospects.

The invention is applicable to the field of intelligent wearable products, and provides intelligent glasses with a wearing detection function and a wearing detection method.The intelligent glasses comprise a glasses frame and two glasses legs, a circuit board is arranged in at least one glasses leg, and at least one processor and at least one sensor connected with the processor are installed on the circuit board; the tail end of the at least one glasses leg is fixedly connected with a metal tail pin, and the metal tail pin is electrically connected to the sensor through an FPC (Flexible Printed Circuit); the sensor is used for collecting capacitance parameters of equivalent capacitance formed by the metal tail needle and the skin of a user; and the processor is used for judging whether the intelligent glasses are in a wearing state or not according to the capacitance parameters and controlling the working state of the intelligent glasses according to a judgment result. The whole detection process does not need user intervention, automatic judgment is achieved through electric signal changes generated by physical contact of the metal tail needle and the human skin, and then the working state of the intelligent glasses is automatically controlled according to the judgment result.

The invention discloses a transformer current rising experiment method, which comprises the following steps of forming an experiment transformer through parallel compensation of a capacitor and a transformer, and providing capacitor current response for the experiment transformer by using the capacitor; constructing an equivalent inductance model and an equivalent capacitance model; applying an initial current response according to a rated current response of the transformer, calculating a capacitor current response, and adding a nonlinear element to obtain a nonlinear voltage response; updating the capacitor current response based on the nonlinear voltage response to obtain an updated capacitor current response; under the condition of considering the temperature effect, updating the updated capacitor current response again based on an equivalent inductance model to obtain a final capacitor current response; performing asynchronous frequency modulation, and updating the voltage response to obtain an updated voltage response; and calculating an experiment result based on the updated voltage response. The device is suitable for the transformer current rising experiment.