339 results about "Induced voltage" patented technology

The invention belongs to the technical field of geophysical exploration, and particularly discloses a differential transient electromagnetic method device and an unexploded ordnance detection method thereof.The differential transient electromagnetic method device is characterized in that a transmitter injects emission current into an emission loop, and the emission loop generates a primary field excitation signal; the underground anomalous body target generates a secondary field excitation signal under the action of the primary field excitation signal; the receiving coil assembly is based on the structure of a differential coil, synchronously counteracts a primary field excitation signal and a uniform background signal in an induced voltage, and expands a local asymmetric differential signal generated by an underground anomalous body target; and the receiver carries out time sequence analysis on the local asymmetric differential signals and extracts differential signal features so as to realize positioning and identification of an underground anomalous body target. The device is suitable for detection of shallow-buried small bodies such as UXO, the overall arrangement range of the device is small, and rapid arrangement and mobile observation in the field are facilitated.

The invention belongs to the field of sensors and signal processing, and particularly relates to a wavelet kernel scale sensitivity oriented abrasive particle induced voltage signal noise reduction method, which comprises the following steps: acquiring an abrasive particle induced voltage signal, and carrying out harmonic elimination on the abrasive particle induced voltage signal to obtain a preprocessed signal; constructing a wavelet kernel function, and calculating the wavelet kernel function and the preprocessed signal to obtain a kernel scale guiding spectrum; constructing a sparse joint noise reduction model based on the kernel scale guiding spectrum; processing the sparse joint noise reduction model to obtain a convex optimization objective function; solving the convex optimization objective function by combining a self-adaptive step gradient descent method and a self-adaptive iterative shrinkage threshold method to obtain a weight vector representing the distribution of the abrasive particle characteristic signals; carrying out binarization processing on the weight vector representing the distribution of the abrasive particle characteristic signals to obtain a characteristic indication vector; carrying out Hadamard product on the feature indication vector and the preprocessed signal, and then carrying out low-pass filtering to obtain a noise reduction signal; according to the method, the abrasive particle characteristic signals can be self-adaptively subjected to non-destructive enhancement and noise reduction processing in a strong interference environment.

A power transmission tower grounding resistance non-contact measurement method based on the electromagnetic coupling principle comprises the following steps that transmitting and receiving electromagnetic coupling coils are arranged around an iron tower grounding body, and geometric calibration and spatial positioning of a measurement area are completed by combining grounding grid structure parameters and soil conduction characteristics; injecting a high-frequency alternating-current excitation signal into the transmitting coil, and synchronously acquiring the amplitude and phase response of the induced voltage at a receiving coil end; carrying out filtering processing on the induction signal by adopting a time-frequency analysis and phase decoupling algorithm, and solving a function relationship between electromagnetic response and grounding impedance by combining a coupling equivalent model; based on experimental calibration data and scene parameters, a nonlinear mapping model of induction response and grounding resistance is constructed, and real-time inversion calculation is carried out by combining a solving result obtained in the third step. According to the invention, the real-time accurate measurement of the grounding resistance under the conditions of no power failure and no wire breakage is realized, and the safety, the operation convenience and the anti-interference capability in a complex environment in the measurement process are obviously improved.

The invention relates to a shaft grounding device for deriving an inductively generated voltage, current or charge from a first machine element (5), preferably a shaft, into a second machine element (1), having a shaft grounding element (4, 50) for discharging, according to the invention, the shaft grounding element (4, 50) is a component separated from a starting material, preferably a continuous article, said component being penetrated by channels (16) in the longitudinal direction thereof or being provided with perforations and / or surface structures and / or surface textures at least on the contact surface thereof with the first machine element. The invention also relates to a method for manufacturing the shaft grounding device.

The invention relates to the technical field of high-precision positioning, in particular to a high-precision six-degree-of-freedom magnetic positioning system and method, and the method comprises the steps: generating a three-dimensional low-frequency magnetic induction field with a preset frequency in a space through a three-axis orthogonal transmitting coil; detecting the three-dimensional low-frequency magnetic induction field through a three-axis orthogonal receiving coil to obtain an induced voltage signal; transmitting the digitized induced voltage signal to a control layer; in the control layer, the position and attitude of the receiver are estimated in real time by using a joint estimation algorithm fusing error state extended Kalman filtering and particle swarm optimization; the error state extended Kalman filtering comprises the steps of constructing a state transition matrix F of a target carrying a receiver, and constructing a process noise covariance matrix Qk and a parameterized measurement noise covariance matrix R of the system through translation acceleration noise sigma a and rotation noise sigma omega. According to the invention, the PSO module is utilized to dynamically and adaptively adjust the key parameters of the ESKF, and high-precision positioning and low-delay response are realized.

The invention provides a non-isolated LED power supply minuteness-removing turn-off circuit, which comprises a second power supply processing module, a minuteness-removing turn-off module and an LED lamp module, and is characterized in that the second power supply processing module is used for converting a high-voltage direct-current power supply into an LED lamp module working power supply; the micro-brightness removal turn-off module is arranged between the output end of the second power supply processing module and the LED lamp module and comprises a direct-current impedance conversion unit, an alternating-current impedance conversion unit and a switching tube, and the switching tube is arranged on a direct-current loop; and the control unit of the second power supply processing module reduces the DC voltage and the non-isolated AC induced voltage to be below the set voltage through the switching signal and the DC impedance conversion unit and the combined action of the switching signal and the AC impedance conversion unit, thereby realizing the minuteness-removing turn-off of the LED lamp module. According to the invention, contactless switch control can be realized, circuit loss is reduced, and working noise is reduced.

The invention relates to the technical field of power electronics, in particular to a portable load adaptive bidirectional charging and discharging circuit module. The module comprises a battery and a load port. The first half-bridge is composed of a gallium nitride switch, and the second half-bridge is composed of a silicon-based field effect transistor; a main winding of the coupling inductor is connected with two half-bridge switch nodes, and a secondary winding outputs induced voltage to provide bias power supply through rectification and filtering; an auxiliary resonant branch comprising an auxiliary switch and a resonant capacitor is connected in parallel to two ends of the switch, and the starting time sequence of the auxiliary switch is ahead of the first gallium nitride switch; the control unit determines a direct current and a high-frequency ripple component according to the shunt resistor and the secondary winding signal, and generates a PWM signal in combination with the port voltage to control the on and off of all the switches. According to the scheme of the invention, self-bias power supply and high-precision composite current detection are realized, the switching loss is reduced, and the energy conversion efficiency is improved.

The invention discloses an oil abrasive particle detection device based on pseudo-random signal excitation and an inversion method, a pseudo-random excitation module outputs pseudo-random alternating current excitation formed by combining a plurality of waveforms, and the pseudo-random waveforms are not less than three frequency waveforms; the sensing module is a three-coil balance type, double-coil mutual inductance type or single-coil self-inductance type inductance sensing unit, coils in the sensing module construct a detection area with an alternating magnetic field under the excitation of alternating current, and the alternating magnetic field has pseudo-random characteristics; the signal acquisition and fitting module detects an induced voltage signal of the coil, and signal pulses generated by the metal abrasive particles under different excitation waveforms are obtained through fitting according to pseudo-random alternating current excitation characteristics; and the abrasive particle feature inversion module performs inversion according to the abrasive particle pulse signals generated by fitting under each excitation, and calculates the equivalent radius, the conductivity and the magnetic conductivity corresponding to the abrasive particles, so as to determine the material and the size of the abrasive particles. According to the invention, the material, size and concentration information of the abrasive particles can be accurately obtained.

The utility model discloses an isolation handcart for a high-voltage switch cabinet, which comprises a handcart body provided with a circuit breaker. The circuit breaker is provided with a moving contact and a fixing piece used for fixing the moving contact, a first fastening piece is arranged in the moving contact, and the first fastening piece penetrates through one end of the moving contact and then is connected with the fixing piece, so that one end of the moving contact is fixed on the circuit breaker; a grounding piece is further arranged on the bottom face of the vehicle body, and the grounding piece is rotationally installed on the bottom face of the vehicle body. Therefore, installation and replacement of the moving contact are simple and convenient, maintenance is convenient, and power failure time can be reduced. Besides, the grounding piece is arranged at the bottom of the vehicle body, so that the whole-course reliable grounding can be realized through frictional contact no matter the switch cabinet is in a running state or a quit state, the electric shock risk caused by static accumulation or fault current is avoided, the residual charge or induced voltage after the equipment is powered off can be quickly discharged, and the safety of maintenance personnel is guaranteed.

A device in a chamber is provided. The device comprises at least one die. The at least one die comprise a first voltage generator, a dielectric layer and a first voltage regulator circuit. The first voltage generator is charged to have a first induced voltage by induced charges generated in response to a first voltage of a first electrode of a chuck in the chamber. The dielectric layer surrounds the first voltage generator to isolate the first voltage generator from the first electrode. The first voltage regulator circuit is coupled to the first voltage generator to receive the first induced voltage and generates a first power supply voltage according to the first induced voltage for a first circuit in the device.

The invention provides a three-core submarine cable metal sheath induced voltage elimination method, which comprises the following steps: acquiring a first induced voltage threshold value of a submarine cable sea area section, and acquiring a second induced voltage threshold value of a submarine cable land section; according to a submarine cable metal sleeve distributed induced voltage calculation model, calculating a first segment length of the submarine cable generating a first induced voltage threshold under a wet condition; according to a submarine cable metal sleeve distributed induced voltage calculation model, calculating a second segment length of the submarine cable generating a second induced voltage threshold under a dry state condition; and performing mutual short-circuit processing on the three-phase metal sleeve of the submarine cable with the first segment length or the second segment length. The three-phase metal sleeves of the submarine cable are subjected to mutual short-circuit treatment, so that the problem that the PE semi-conductive layer is overheated and melted due to temperature rise caused by rise of induced voltage of the three-phase metal sleeves can be prevented.

The invention provides an implantable medical device and a positioning method of a wireless energy transmission coil thereof, and the method comprises the steps: re-exciting a magnetic field through a transmitting coil in a process that the spatial position of the transmitting coil is adjusted; acquiring an induced electrical signal at the receiving coil corresponding to the process of re-exciting the magnetic field; and extracting slope characteristics from the acquired induction electric signals, and judging whether the receiving coil is aligned with the transmitting coil or not according to the slope characteristics. Sensors (such as a magnetoresistive sensor and an electronic compass) hardware do not need to be additionally arranged, the size of the implantation end is small, trauma to a patient in the implantation process is reduced, the coil alignment state is judged by extracting slope characteristics instead of judging the coil alignment state based on signal intensity (such as an absolute value of induced voltage), and the accuracy of the coil alignment state is improved. The judgment method based on the slope characteristics is higher in accuracy and better in anti-interference performance.

This invention provides a method for measuring fault patterns when AC induced voltage is generated in a power transmission line, and its use. [Solution] A DC voltage is applied to a power transmission line where AC induced voltage is generated, and the applied DC voltage and current are measured. Based on the resistance value of the power transmission line calculated from these values, the fault pattern of the power transmission line is determined.

A power supply circuit and a power supply device, and the power supply circuit includes a bridge switching circuit, a transformer, a resonant circuit, a rectifier circuit. The bridge switching circuit, the transformer, the resonant circuit, and the rectifier circuit are sequentially connected in series. The resonant circuit includes an induction coil connected in series between the transformer and the rectifier circuit. In the case that the inductive coil is connected in series in the circuit, the inductive coil can participate in conductive charging as an inductor in the resonant circuit. Further, the inductive coil can also receive the inductive voltage wirelessly transmitted by the external circuit through electromagnetic induction, and the inductive voltage can be transmitted to the load through the rectifier circuit to achieve inductive charging.

The application provides a transient ground potential rise induced coupling determination method through cable shielding layer, and belongs to the technical field of cable shielding layer.The application establishes a distributed parameter partial element equivalent circuit model of a grounding network, solves transient ground potential distribution by using a finite difference time domain method, obtains equivalent transfer impedance frequency characteristics of a braided shielding layer by using a four-port S parameter vector network analysis method and a variational asymptotic homogenization multi-scale algorithm, solves core line common mode voltage and differential mode voltage by establishing a multi-conductor transmission line equation group, constructs an artificial intelligence prediction model based on a topology perception graph neural network, solves a large-scale sparse admittance matrix by using a multilevel fast multipole method to obtain full network induced voltage distribution, and establishes a quantitative relationship model between ground potential rise and core line induced voltage, so that the technical problems that cable core line induced voltage caused by transient ground potential rise is difficult to accurately predict and effectively suppress are solved.

A voltage control module of the power supply circuit is used for transmitting an induced voltage to a constant voltage output module when the induced voltage is less than a preset stabilized voltage, and is switched on and stops outputting the induced voltage when the induced voltage is greater than the preset stabilized voltage. The constant voltage output module discharges to output a preset constant voltage; the induced voltage is obtained according to the induced current of the secondary side of the current transformer; the current sampling module is used for sampling induced current to obtain an amplified voltage signal; the control module is used for obtaining the actual current of the primary side of the current transformer according to the amplified voltage signal, and generating a control signal when the actual current is greater than a preset current threshold value; the switch protection module is used for responding to the control signal and switching between connection and disconnection so as to share energy of the voltage control module during connection. The power supply circuit is high in stability, energy is shared through conduction of the switch protection module in heavy load, and safety and reliability of the circuit are improved.

The invention provides a position detection device capable of detecting the position of a shaft moving forward and backward in the axial direction with high precision. A stroke sensor (1) that detects the position of a rack shaft (13) that moves in the axial direction is provided with: a substrate (3) on which an excitation coil (4) and detection coils (5, 6) are formed; and a detection body (2) that is fixed to the rack shaft. In the detection coil, a first portion (51, 61), a second portion (52, 62), a third portion (53, 63), and a fourth portion (54, 64), which induce an induced voltage by magnetic flux linkage of the excitation coil, are arranged in a short-side direction of the substrate perpendicular to an axial direction of the rack shaft. The detection body has a first detection body part (21) facing the first portion, a second detection body part (22) facing the second portion, a third detection body part (23) facing the third portion, and a fourth detection body part (24) facing the fourth portion. The first to fourth detection body parts (21-24) are separated in the axial direction of the rack shaft.

The present application provides a motor control device capable of accurately detecting a rotor position by sensorless control without being affected by component deviation. The motor control device of the present application includes a rotor position detection section (12) that detects a rotor position based on an induced voltage value calculated from an inverter output voltage value calculated based on a duty cycle on time calculated from a PWM signal generation section, a zero point estimation section (32) that estimates a zero point by calculating a duty cycle on time at which a phase current value is 0 based on a relationship between the phase current value and the duty cycle on time, a correction value operation section (33) that calculates a correction value for correcting the inverter output voltage value based on the estimated zero point, and a rotor position operation section that calculates a rotor position based on an induced voltage value calculated from the inverter output voltage value corrected based on the correction value.

The application discloses a coil layout optimization and pose estimation simulation model, relates to the technical fields of electromagnetic tracking, simulation modeling and electromagnetic layout optimization, and aims to realize optimal design of a transmitting coil spatial layout and high-precision pose calculation through high-fidelity numerical simulation data driving. Under the driving of specific excitation signals, a simulation engine utilizes ANSYS finite element analysis to pre-construct a global magnetic field fingerprint characteristic map of the transmitting coil, so as to replace a traditional magnetic dipole mathematical approximation model. In order to improve the scientificity of the coil layout, virtual magnetic field data generated by ANSYS is mapped into sensor sensing voltage prediction values, and residual errors are constructed with pose estimation values output by a calculation module; subsequently, the pose errors are used as feedback evaluation indexes to iteratively correct coil geometric arrangement parameters in the ANSYS model, and finally, a global optimal layout is obtained.

The invention relates to a method for operating a magnetic-inductive flowmeter, said magnetic-inductive flowmeter comprising a measuring tube having an inflow region, an outflow region and a measuring region therebetween for conducting a flowing medium through the flowmeter; a magnetic field generating device for generating a magnetic field penetrating the measuring tube in the measuring region perpendicular to the flow direction of the medium; the measuring electrode pair is positioned in the measuring area of the measuring tube and is used for collecting voltage induced in the medium in the measuring tube; and a control and evaluation unit which determines a flow measurement value in the flow measurement operation according to the measured induced voltage. In the filling level measuring operation, a measuring current is fed into the medium in the measuring tube through the circuit electrode. And identifying the dry circuit electrode and / or the dry measuring electrode by measuring and evaluating at least one of the following parameters: the acquired measuring electrode voltage, the measuring current output by the current source, and the feed-in voltage caused by the current source at the first circuit electrode.

The invention relates to the technical field of circuit detection, and particularly discloses a detection circuit and a detection method applied to an electric meter and the electric meter, the detection circuit comprises an electromagnetic induction module, a comparison module and a controller, the electromagnetic induction module is used for detecting an electromagnetic signal through electromagnetic induction and generating an induced voltage; the comparison module is connected with the electromagnetic induction circuit and used for comparing the induction voltage with reference voltage and outputting a comparison signal, and the comparison signal is used for indicating whether the electromagnetic signal exceeds a threshold value or not; the controller is connected with the electromagnetic induction circuit and used for judging whether the live line and the zero line of the ammeter are reversely connected according to the induced voltage. According to the detection circuit, electrostatic detection and zero and live wire connection detection can be integrated in one detection circuit, the configuration cost is reduced, the occupied space is reduced, and detection data of the electrostatic detection and detection data of the zero and live wire connection can cooperate with each other.

The invention relates to the technical field of electromagnetic valve manufacturing and quality detection, and discloses an online detection system for the pressing force of a valve element of an electromagnetic valve, and the system comprises a composite magnetic field excitation module, a multi-physical field signal acquisition module, a multi-dimensional feature resolving module and a force value estimation output module. A composite magnetic field is applied to a valve element, and an induced voltage signal, a Hall signal and a temperature signal are synchronously collected; then, three characteristic quantities of harmonic amplitude, instantaneous magnetic field intensity and instantaneous temperature are calculated; and finally, inputting the three characteristic quantities into a preset multi-dimensional mapping model, and calculating to obtain a pressing force estimated value. The invention aims to solve the problem of low measurement accuracy caused by the fact that the existing single electromagnetic parameter detection is easily interfered by temperature and excitation field fluctuation. And through multi-physical field signal fusion and multi-dimensional feature compensation, the influence of disturbance factors is effectively eliminated, and the accuracy, stability and anti-interference capability of online detection are remarkably improved.

The application discloses a small generator and relates to the technical field of generators.The generator comprises a shell, double-end heat dissipation ventilation holes, a shieldable permanent magnet rotor and a temperature control and torque limiting protection assembly.A groove on the outer periphery of the rotor and an embedded paddle build through air flow when rotating, so that self-driven heat dissipation is realized.The temperature rise of a coil triggers a triode driven protection electromagnet through a thermistor, the torque transmission of a toothed disc friction coupling is adjusted, continuous derating is realized, and the generator can be stopped until zero coupling.The permanent magnet adjusting assembly is combined with an electromagnetic locking mechanism through an iron shell body-aluminum strip-permanent magnet combination, the magnetic field output is quickly cut off, and no induced voltage is generated during maintenance.

Arrangement of artificial adaptive intraocular lenses whose operating mode is based on binocular interaction and the accommodation-convergence reflex of the eyes, i. wherein all electrically activated adaptive intraocular lenses (8)(9)(10) comprise activation mechanisms and are operated without interaction between the left and right eye, characterized in that ii. the arrangement of the novel artificial adaptive intraocular lenses, whose operating mode is based on binocular interaction (11.3)(12.3)(5) and the accommodation-convergence reflex of the eyes, is characterized by the inclusion of a microchip, wherein a microchip is used for each intraocular lens of each eye, the microchip containing magnetic nanoparticles with electromagnetic properties and made of biocompatible, non-cytotoxic material (5.1)(3.1)(4.1), wherein a conductor connected to the microchip forms a closed loop (5.2)(3.2)(4.2), and wherein the change in the distance between the microchips of the artificial intraocular lenses of the right and left eye during the convergence movements (5.3)(11.2)(12.2) and divergence movements (5.3)(11.1)(12.1) changes both the strength and the phase of the electromagnetic field (5.4) between the two microchips (5.1)(3.1)(4.1) of the two artificial intraocular lenses, which interact with each other, wherein this change in the strength and phase of the electromagnetic field (5.4) causes the generation of an electric charge or voltage at the ends of the conductor (5.5)(3.3)(4.3), which leads to an electric current flow (5.6)(3.4)(4.4) through the closed loop of the conductor (5.2)(3.2)(4.2) due to the induced voltage and according to the principle of electromagnetic induction.

An integrated circuit (IC) includes an array of compute units and control circuitry for mitigating supply voltage overshoot. Each compute unit contributes to an aggregate time rate of change of current drawn by the IC when transitioning between processing and non-processing states. The control circuitry is configurable to stagger when each compute unit is eligible to transition from processing data to not processing data relative to other compute units, thereby limiting the negative rate of change of current through inductive loads of the IC and preventing voltage overshoot above a maximum threshold. The control circuitry may be distributed among the compute units and configured using statically reconfigurable parameters that specify the maximum number of compute units permitted to transition concurrently and the minimum number of clock cycles between successive group transitions.

This utility model discloses a photosensitive drum counting device, comprising: a flat-panel metal detector, a column disposed on one side of the flat-panel metal detector, and a main control device disposed on the top of the column and electrically connected to the flat-panel metal detector; the flat-panel metal detector is used to sense the copper electrode plates on the top of each photosensitive drum in the packaging box and outputs an induced voltage corresponding to the number of copper electrode plates; the main control device calculates the number of copper electrode plates based on the induced voltage, and thus determines the number of photosensitive drums in the packaging box. This photosensitive drum counting device can automatically count the number of photosensitive drums in a single packaging box and can issue an alarm when there are fewer or more photosensitive drums than required, avoiding situations where there are fewer or more photosensitive drums in the shipped packaging boxes. It solves the problem of inaccurate product quantity per box caused by manual counting and weighing differences, reduces manual labor intensity, and improves the automation level of the production line.

The invention belongs to the technical field of medical detection, and particularly relates to an electrochemical device for detecting tumor cells in blood and a preparation method of the electrochemical device. The electrochemical device comprises a biocompatible flexible substrate, a side gate electrode, a source electrode, a drain electrode, an insulating film, a hydrophilic semiconductor and a ligand for capturing a tumor marker, the hydrophilic semiconductor is arranged between the source electrode and the drain electrode, and the biological ligand for capturing the tumor cell marker is arranged on the side gate electrode; the side gate electrode is used for generating induced voltage when a tumor in a blood vessel is captured, so that induced current is generated between the source electrode and the drain electrode; the insulating film is deposited on the part outside the channel and the side gate electrode, so that crosstalk between adjacent electrodes is prevented. The invention also discloses a manufacturing method and a testing method of the electrochemical device. The electrochemical device can realize minimally invasive and real-time detection, and is simple in structure, low in power consumption, high in stability, small in detection wound and high in detection speed.

The present disclosure relates to a mirror angle adjusting device and a head-up display device. The mirror angle adjusting device comprises a mirror support for supporting a mirror and including a rotation shaft; a fixed support for supporting the rotation shaft in a manner allowing the rotation shaft to rotate; a magnet provided on one of the rotation shaft and the fixed support; a sensor provided on the other and capable of sensing a magnetic field formed by the magnet; a driving device configured to drive the rotation shaft to rotate; and a control device configured to collect an induced voltage of the sensor and a tangent at the induced voltage of an output waveform, and control the driving device to rotate the rotation shaft until a desired angle position at which the induced voltage collected thereat is equal to a predetermined voltage and the tangent is equal to a predetermined tangent, when the induced voltage is not equal to the predetermined voltage and / or the tangent is not equal to the predetermined tangent. According to the present disclosure, automatic correction of the mirror angle position deviation can be achieved, thereby improving driving safety and bringing a better driving experience.

The invention discloses an electric field evaluation method and system based on potential-power transmission line coupling, and relates to the technical field of power system protection, and the method comprises the steps: building a current fluctuation model based on a lightning channel engineering model; hybrid emission of a current element i and a charge element q is adopted based on a current fluctuation model; obtaining a voltage U'under the condition of lossy earth through the induced voltage on each section of line; obtaining a total horizontal voltage based on the voltage under the condition of lossy earth and the voltage under the condition of lossless earth; the electric field is evaluated based on the total horizontal voltage. On the basis of a dipole current model, charge distribution introduction, current generation of magnetic potential and charge generation of potential are combined, the relative positions of charges and current elements can be improved when an electric field channel is discretely simulated by a computer, a near-field electric field can be simulated more accurately, and the simulation precision is improved. Meanwhile, the divergence problem caused by calculation truncation errors can be counteracted when the structure is coupled with a coil type structure, and the accuracy and stability of calculation are improved.

The utility model discloses a safety shoe with an induced voltage alarm function, which comprises a safety shoe rear upper and a safety shoe front upper, the safety shoe rear upper and the safety shoe front upper are both adhered to a sole main body, a heightening sole is arranged at the tail of the sole main body, a metal bin is pre-embedded in the heightening sole, a circuit board is fixedly clamped in the metal bin, and the circuit board is connected with the safety shoe rear upper and the safety shoe front upper. A circuit board is arranged in the metal bin, a control chip is arranged on the surface of the circuit board, and a buzzer is fixedly arranged on the bottom side in the metal bin. A circuit board, a chip and a buzzer which are used for testing induced voltage and have an alarm prompt function are specifically embedded in the sole of the safety shoe, and the safety shoe has the characteristics of small size, light weight, high universality, wide application range and the like, so that the induced voltage alarm function can be realized, the induction function of induced voltage can be met, and the safety shoe can also be used as a safety shoe. And the comfort of a wearer is not influenced.