30results about How to "Strong anti-interference" patented technology

The invention discloses an intelligent power conversion cabinet control system and a power conversion cabinet, and relates to the technical field of power conversion cabinet control, and the system comprises a user interaction module, a touch screen and voice recognition convenient operation, and multilingual interaction; the battery management module is used for accurately monitoring parameters, quickly early warning abnormity and intelligently regulating and controlling charging and discharging; the battery replacement control module is high in identity verification speed and stable, accurate and fast in battery replacement operation; the data storage and analysis module is used for mass data storage and deep mining; the communication module is used for realizing dual-mode stable transmission and encrypted cache; the cabinet body comprises a plurality of battery cabins, the protection is comprehensive, the heat dissipation is intelligent, the modular design is beneficial to expansion, and the high-speed bus is strongly connected. The system is convenient in interaction and efficient in battery replacement. The battery management is accurate, the service life is prolonged, the data-driven operation is optimized, the communication is safe and stable, the remote monitoring is convenient, the cabinet body design is reasonable, the protection and heat dissipation are good, the modularization is flexible, the battery replacement service experience and operation benefits are powerfully improved, and the development of the intelligent battery replacement field is promoted.

The invention provides an ore particle granularity detection device and method based on a flexible vibration disk, and the device comprises the flexible vibration disk which is used for vibrating an ore material at a certain frequency and amplitude, so that the ore material is uniformly distributed and is in a proper posture; the image acquisition device is used for continuously shooting the ore materials on the flexible vibration disc to obtain ore images; the image processing device is used for carrying out preprocessing, segmentation, feature extraction and particle size analysis on the ore image and outputting the ore particle size distribution condition and an accumulative distribution curve; and the result output device is used for displaying the ore image and the granularity analysis result. According to the invention, while material accumulation is prevented, real-time, accurate and efficient detection of attitude distribution of ore materials is realized, and the method has the advantages of low cost of detection equipment, easy maintenance, strong interference resistance, high accuracy and stability of detection results, and the like.

The invention relates to a chip type integrated leakage current detection method and device, and the method comprises the steps: enabling a first line body and a second line body to be led into an input loop and an output loop of a target chip through a chip packaging lead frame, and enabling the first line body and the second line body to form a loop through an external power supply; a plurality of magnetic sensing units with the same number and symmetrical positions are respectively arranged on the first line body and the second line body; measuring magnetic field data of a plurality of preset positions through the plurality of magnetic sensing units; and calculating the leakage current of the target chip based on the magnetic field data of the plurality of preset positions. According to the invention, through the design of the chip lead frame, the wire body is introduced into the chip, and the magnetic field is measured through the magnetic sensitive sensing unit, so that miniaturization and integration of chip electric leakage measurement are realized.

The invention relates to a multi-sensor fusion positioning method for a multi-layer roadway scene. The method comprises the following steps: acquiring attitude data of an inertial measurement unit, point cloud data of a laser radar and UWB (Ultra Wideband) beacon data in different time periods; importing the point cloud data and the attitude data into an SLAM algorithm to generate a plurality of first global maps in different time periods; combining the plurality of first global maps to generate a second global map; splitting the second global map to generate a plurality of topological sub-maps; and obtaining vehicle positioning according to the UWB beacon data. The invention further discloses a device, electronic equipment and a storage medium suitable for the method. By using the multi-sensor fusion positioning method and device for the multi-layer roadway scene, the electronic equipment and the storage medium provided by the invention, the problems that the labor cost of field surveying and mapping and instrument measurement is relatively high, and the method is not suitable for large-scale underground scenes are solved; and the laser radar cannot be started at any position.

The invention discloses a low-overload time sequence combination safety device which is characterized in that an electric detonator is arranged on a shell, a power connection switch is arranged on one side of the shell, a pressing plate is arranged below the shell, a sliding block is arranged at one end in the shell through a push spring, a detonating grain is arranged on the sliding block, a locking groove is formed in one side of the sliding block, and a bottom plate is arranged below the part, on one side of the pressing plate, of the shell; an inertia piece is arranged on the bottom plate through an inertia spring, a steel ball is arranged between a locking groove in one side of the sliding block and the inertia piece, a side groove is formed in the side face of the inertia piece, and an electromagnetic unlocking mechanism is arranged between the side groove and the shell. The first-stage safety of the security device is realized by using a low overload condition and time sequence electromagnetic unlocking mechanism combined mode, the circuit is realized only by hardware, software is not included, and the device has the characteristics of low cost, simple structure, high reliability and strong interference resistance, can be applied to fire-fighting rocket projectiles, realizes large-scale production and configuration of the fire-fighting rocket projectiles, and enhances the fire-fighting power.

The application discloses a kind of mining horizontal drilling real-time depth measurement and damage detection device and method, setting: measurement host computer;Emit probe brush, install at drilling orifice, be connected with measurement host computer by communication cable, coupling measured drill rod with emission wave signal;Receive probe brush, install at drilling orifice, be connected with measurement host computer by communication cable, coupling measured drill rod with echo signal received by measurement host computer;Ground drill, install in coal seam near drilling, be connected with coal seam near drilling by communication cable, form signal loop.The application is suitable for ordinary drill rod, without adding measurement equipment in drilling tool, without reforming drilling tool to save cost, without affecting drilling efficiency;Not only can the total length of drill rod in the process of drilling be measured in real time, but also the damage of each drill rod can be checked.

The application discloses a kind of leakage point positioning method, equipment and medium of water supply network, belong to water supply network operation and leakage control technical field, for solving in existing leakage point positioning, it is easy to rely on single data, equipment and algorithm complex, and also lack high-precision space linkage and to data adaptability and insufficient refinement, it is difficult to realize the technical problems of accurate positioning of water leakage point of water supply network.Method includes: the operating state of water supply network is processed to multi-source data acquisition, obtains water supply network core data;The standardization processing of feature vector is carried out to the corrected water supply network core data after pre-processing, obtains effective water supply network data;Effective water supply network data is screened under the risk value of leakage point area about leakage point, obtains high suspected leakage point area based on water supply network section;Leakage point spatial positioning calculation is carried out to high suspected leakage point area under local topology, obtains the final leakage point area position in water supply network grid.

The invention discloses an improved method for underwater optical signal detection, and belongs to the technical field of optical communication. The method comprises the following steps: taking a Bessel-Gaussian beam as a carrier beam, acquiring temperature and salinity values of a communication water area through a sensor, and then calculating a long-term expansion radius of the carrier beam transmitted to a receiving end under the temperature and salinity conditions of the water area and a focal spot radius of the carrier beam on a focal plane after passing through a focusing lens; on the basis, the suggested value ranges of the aperture and the focal length of the focusing lens are determined, so that the carrier light beam can be completely received by the focusing lens and is completely coupled into the detector; and finally, a detector is arranged at the focal plane of the selected focusing lens, so that the detection of the carrier light beam is realized. According to the invention, for the adverse effect of water area temperature and salinity changes on carrier light beam detection, appropriate focusing lens parameters are selected for compensation, and the adaptability of an underwater wireless optical communication system to different water area environments is improved.

The invention relates to the technical field of data processing, and provides an intelligent sound box control method, device and equipment and a storage medium, and the method comprises the steps: collecting environment sound data of an intelligent sound box, and carrying out the frequency analysis, and obtaining different components; generating user instruction data according to the low-frequency component, performing association analysis on the user instruction data and the intermediate-frequency component to obtain an instruction confirmation signal, performing noise filtering on the high-frequency component to obtain an equipment control instruction and a user interaction feedback instruction, and generating an updated playlist based on the equipment control instruction; and integrating the user interaction feedback instruction and the updated playlist to obtain a playlist responding to the user interaction, and controlling the intelligent sound box according to the playlist responding to the user interaction. Through frequency division analysis and association processing of the target sound, the sound recognition accuracy and operation responsivity of the intelligent sound box in a complex environment are improved, and the problem of recognition errors caused by background noise interference in the complex environment is improved.

This utility model discloses a fire suppression device for a nickel-metal hydride (NiMH) battery box under a train, including a box for housing the NiMH battery and a multi-parameter detector and a fire extinguishing device disposed within the box. The wiring terminals of the NiMH battery are located on the top of the NiMH battery body. The multi-parameter detector includes a housing and a smoke detector, a temperature detector, an H2 detector, and a CO detector located within the housing. The housing is fixed to the inner wall of the top plate of the box and is positioned facing the wiring terminals of the NiMH battery. The nozzle of the fire extinguishing device is positioned facing the NiMH battery. This utility model also provides a fire suppression system for a NiMH battery box under a train, including the aforementioned fire suppression device for a NiMH battery box under a train. By adopting the above technical solution and using a multi-parameter detector, the accuracy and response speed of early fire identification are significantly improved.

This invention discloses a differential information forwarding method, comprising the following steps: S1, setting parameters; S2, receiving differential information to be forwarded from a host computer; S3, encoding and transmitting the received differential information according to the set parameters; in step S1, the parameters include channel, transmit power, and modulation mode, wherein the modulation mode includes LoRa mode and GFSK mode; when the modulation mode is LoRa mode, two frequency points are set on each channel, with an interval of at least 55MHz between each frequency point, and a differential information signal is transmitted once at each frequency point, with the two frequency points alternately transmitting data frames; when the modulation mode is GFSK mode, three frequency points are set on each channel, with an interval of at least 55MHz between each frequency point, and a differential information signal is transmitted once at each frequency point; this invention employs a dual-frequency or triple-frequency retransmission mechanism, enabling the receiver to avoid interference points as much as possible in the time and frequency domains, greatly improving the data packet transmission success rate and adapting to complex electromagnetic environments.

The application discloses a point pair registration method and system based on feature guidance and double constraints, and belongs to the technical field of computer vision and robot grabbing. The method aims to solve the problems of recognition failure and insufficient estimation accuracy of traditional methods when parts are blocked and stacked, and point cloud features are not obvious. The scheme adopts a two-stage optimization strategy. Firstly, in the coarse registration stage, an adaptive sampling PPF algorithm guided by geometric features is proposed. By preferentially sampling points in the edge, curvature and other feature obvious areas, the robustness and efficiency of matching are improved. Secondly, in the fine registration stage, an ICP algorithm with multi-constraint optimization is proposed. The pose result obtained by coarse registration is used as the initial value. Through rotation and angle constraint, a multi-objective optimization function is constructed to guide the fine registration process to converge in the correct direction and avoid falling into local optimum, thereby ensuring the accuracy and physical feasibility of the final pose estimation. The application significantly improves the accuracy of industrial part pose recognition.

The invention provides a multi-channel CANFD (Controller Area Network Forwarding Detection) communication system and method based on ZYNQ, the communication system comprises an all-programmable system on chip ZYNQ, a DDR (Double Data Rate) memory, an optical transceiver module and a CANFD transceiver module, the all-programmable system on chip ZYNQ comprises a processing system PS and a programmable logic PL, and the PS and the PL are communicated through a GP port and an HP port. And the DDR memory is connected with the ZYNQ and is used for providing an application software running memory and storing CANFD receiving data and SRIO receiving and transmitting data. The PL comprises an SRIO control module, an SRIO IP, an AXI interconnection module and a multi-path CANFD IP module, and the PS and the SRIO control module of the PL are interconnected through a GP0 and an HP0. By means of the method, multi-channel CANFD conversion optical communication is achieved, and the problems that a traditional CANFD bus is not high in transmission rate and limited in transmission distance are solved.

The invention discloses modified phosphate tailing ceramsite for advanced treatment of phosphorus-containing wastewater and a preparation method and application thereof, and relates to the technical field of comprehensive utilization of phosphate tailing resources, the preparation method comprises the following steps: (1) mixing and grinding reverse flotation phosphate tailings, direct flotation phosphate tailings and montmorillonite to obtain a mixture; (2) granulating the mixture to obtain raw material nodules, and drying to obtain dried raw material nodules; (3) roasting the dried raw material balls in a muffle furnace to obtain primary tailing ceramsite; (4) putting the primary tailing ceramsite into deionized water, and dropwise adding a rare earth modified solution with the pH value of 4-5 under the condition of stirring in a water bath at the constant temperature of 30-60 DEG C; after dropwise adding, continuously stirring for 2-6 hours in a constant-temperature water bath, standing and aging for 8-10 hours in the constant-temperature water bath, taking out and drying to obtain the modified phosphate tailing ceramsite for deeply treating the phosphorus-containing wastewater. The efficient phosphorus removal ceramsite has the advantages of low cost, short production period, good phosphorus removal effect and the like, and the obtained efficient phosphorus removal ceramsite has an extremely strong adsorption effect on phosphate.

The invention discloses a vasculitis antibody joint detection kit. The kit comprises a detection membrane strip, an enzyme-linked substance, a substrate solution, a stop solution and a concentrated washing solution, the detection membrane strip is coated with a parallel detection line composed of natural antigens PR3, MPO and GBM, the kit can detect three autoantibodies at the same time, has the advantages of being high in anti-interference and anti-cross reaction capacity, is good in specificity and high in sensitivity, and can be suitable for manual or instrument automatic detection application scenes.

The invention belongs to the technical field of non-contact high-precision component detection, and provides a non-contact detection sensor integrated differential optical path capable of reducing the influence of environmental fluctuation in order to meet the requirement for the surface measurement precision of a non-contact high-precision component and further reduce the influence of the environmental fluctuation. A two-stage system design is adopted: the first stage adopts a double-frequency heterodyne interference light path, the resolution can reach 0.3 nm under the subdivision of a quadruple light path, a measurement reflector c and a reference reflector c are symmetrically arranged, so that the interference light path is geometrically symmetric, and the phase drift caused by environmental disturbance can be reduced by performing differential subtraction on delta phi caused by environmental disturbance; a differential optical path is designed on the basis of a double-frequency heterodyne interference optical path and is integrated with a second-stage differential confocal optical path, so that the surface of an element to be measured can be tracked with high precision.

The invention discloses a satellite mobile communication system multi-broadcast frequency point parallel search method and device, and the method comprises the steps: obtaining a satellite digital intermediate frequency signal containing a plurality of target frequency bands, carrying out the digital down-conversion processing of the intermediate frequency signal through employing multiple channels, obtaining a baseband signal corresponding to each target frequency band, and transmitting the baseband signal to a receiver; performing cross-correlation operation on the baseband signal after downsampling and filtering processing and a local broadcast signal; and performing frequency domain transformation on a cross-correlation operation result, determining the maximum amplitude and the signal-to-noise ratio in the frequency domain data of each channel, screening the effectiveness of each channel according to the signal-to-noise ratio, and determining the position of the satellite by taking the beam direction corresponding to the maximum amplitude in the effective channel as the incoming wave direction of the broadcast signal. The real-time performance of signal searching in the multi-frequency-point environment is improved, the high signal detection capacity and anti-interference performance are shown in the complex electromagnetic environment, and the method has the advantages of being small in resource consumption, high in operation speed, stable in searching result and good in universality.

The invention discloses an oral cavity three-dimensional scanning system and method based on dual-band heterogeneous structure light coding, and belongs to the technical field of optical three-dimensional scanning. The system comprises a light source, a coding light modulation device, at least two image acquisition units and a data processing unit, the light source can respectively emit first wave band light and second wave band light with different wave bands; the coding light modulator modulates the first wave band light into a main coding pattern containing discontinuous stripes and modulates the second wave band light into an auxiliary coding pattern containing continuous stripes, and the stripes of the two coding patterns are alternately arranged at intervals; the modulated first wavelength light and the modulated second wavelength light irradiate the surface of a measured area, and each image acquisition unit acquires a coded image reflected by the measured area; and the data processing unit decodes the main coding image to obtain a reference matching point pair and parallax data, decodes the auxiliary coding image based on the result to obtain a high-density extended matching point pair and extended parallax data, and completes integrated three-dimensional reconstruction through triangulation after integrating the two types of data.

The invention discloses a real-time communication mechanism for an agricultural irrigation network, and relates to the technical field of real-time communication.The real-time communication mechanism comprises AINP message format confirmation, AINP data exchange confirmation and AIDE cloud data exchange.The method includes the steps that firstly, the unified format of data frames is defined through the AINP message format confirmation step; irrigation valve state and opening signals are collected and converted into corresponding data frames, node response is completed based on a master-slave response mechanism, validity of a frame format is verified through DCR verification, LORA wireless communication specifications of irrigation valve nodes and an AINP gateway are confirmed and set through AINP data exchange, and the verified data frames are transmitted to the gateway based on an AINP data exchange algorithm. Finally, AIDE cloud data exchange is carried out, monitoring data are read and written through a cloud algorithm and uploaded to the cloud, and the system has the advantages of being low in cost, high in interference resistance, good in compatibility and reliable in data and is adaptive to a large-scale intelligent irrigation network.

The utility model discloses a large-scale generator excitation direct current power cable state monitoring device, which detects temperature, humidity and combustible gas concentration environmental data of positions such as cable holes, cable shafts and the like which are easy to heat or inconvenient to inspect through measuring elements. And current data and insulation data of the excitation direct-current power cable are acquired at a joint of an excitation system or a generator collector ring, analysis and judgment are performed through an excitation direct-current power cable fault diagnosis mechanism, and a judgment result is sent to a monitoring picture of operation and maintenance personnel. During specific judgment, if all sampling data values are within a standard range fixed value set in the excitation direct-current power cable fault diagnosis mechanism, the running state of the excitation direct-current power cable is determined to be normal, and otherwise, the running state of the excitation direct-current power cable is determined to be abnormal. The device is low in power, strong in anti-interference, accurate in measured value, and suitable for monitoring the operating environment state of the excitation direct-current power cable.

The invention belongs to the technical field of analysis and testing, and particularly relates to a molecular weight determination method of polyethyleneimine. The molecular weight determination method of polyethyleneimine comprises the following steps: S1, preparing N standard solutions by adopting N polyethylene glycol standard samples with different molecular weight levels, and preparing a solution to be detected by adopting a polyethyleneimine sample to be detected; s2, a gel permeation chromatograph is adopted for testing and collecting chromatographic data of the N standard solutions and the to-be-detected solution, and the testing conditions include that an acetic acid-sodium acetate buffer solution serves as a mobile phase, the concentration is 0.03-0.07 mol / L, and a chromatographic column is a chromatographic column set formed by connecting at least two PL aquagel-OH in series; s3, making a standard curve according to the collected chromatographic data of the N standard solutions, and determining the molecular weight information of the to-be-detected polyethyleneimine sample according to the collected chromatographic data of the to-be-detected solution and the standard curve. According to the method provided by the invention, the accuracy of a test result of the low-molecular-weight polyethyleneimine is improved.

This invention relates to the field of fiber optic sensing technology, specifically to an NHCPCF fiber optic seawater salinity sensor with dual microchannels, its fabrication method, and its application. The sensor comprises: an introductory single-mode fiber, a nodeless hollow-core photonic crystal fiber, and an outtroductory single-mode fiber, sequentially fused together. The nodeless hollow-core photonic crystal fiber includes a first cladding and a main vent. Uniformly distributed silica tubes are disposed inside the main vent, with the tube wall tangent to the inner wall of the main vent and the axis of the main vent parallel to the axis of the silica tubes. The sensor utilizes the anti-resonance reflection waveguide principle of NHCPCF and specific microchannels to measure seawater salinity. It avoids the traditional method of large-area cavitation in the cladding, employing microchannels to improve integration, effectively prevent fiber breakage, and enhance mechanical strength during testing. This sensor exhibits high sensitivity (salinity sensitivity -0.88 nm / ‰), good repeatability, and stability.

The utility model relates to positioning technology equipment field, concretely relates to a kind of positioning card based on the fusion of Beidou technology and UWB technology, including shell and built-in positioning communication circuit;Shell is assembled by upper shell and lower shell through clamping or insertion, and upper shell is equipped with touch screen, voice port and indicator light, and lower shell is equipped with communication interface;Positioning communication circuit contains dual-core main processing module, connects UWB positioning module, Beidou positioning module, dual power supply and power management module etc. Dual power supply independent power supply, and promote endurance;Dual positioning module cooperates to realize seamless positioning indoors and outdoors, and indicator light, voice and touch screen enhance interaction. The utility model is high in positioning accuracy, strong in anti-interference, and is applicable to complex environment positioning management.

The utility model discloses a device for measuring transparency in water, and belongs to the technical field of measurement of transparency in water. The device comprises a saybolt disc, a box staff and a lifting ring screw, the saybolt disc is a circular plate body, and the disc surface of the saybolt disc is arranged in a black and white alternate manner and is equally divided into four parts; a vertical box staff is arranged in the center of the top of the saybolt disc, the box staff is in a tower-type shrinkage form, a rough measurement surface with scales and a precise measurement surface with scales are respectively arranged on two surfaces of the box staff, and a threaded hole is formed in the bottom end of the box staff; a lifting ring screw is arranged in the center of the bottom of the saybolt disc and comprises a screw rod and a lifting ring, and the screw rod and the lifting ring are of an integrated structure; a screw rod of the lifting ring screw penetrates through the center hole of the saybolt disc in a matched mode and is in threaded connection with the threaded hole in the bottom end of the telemeter rod. The device is strong in interference resistance, avoids measurement interference of the rope caused by factors such as water flow ship shaking, can not be influenced by the factors such as water flow ship shaking during measurement, is accurate in vertical measurement, is high in measurement precision, and is simple, convenient and flexible to operate.

The utility model discloses a kind of controller automatic heat sink based on IGBT internal NTC, it is related to electronic equipment heat dissipation technical field.The device includes IGBT module, temperature acquisition module, control unit, heat dissipation execution mechanism and protection module;IGBT module built-in NTC thermistor, temperature acquisition module is connected with NTC to collect temperature signal, control unit receives temperature signal and exports control instruction to heat dissipation execution mechanism, protection module triggers protection mechanism according to temperature threshold value.The utility model monitors IGBT substrate temperature in real time by NTC, combines thermal model to compensate junction temperature deviation, realizes the automatic regulation and accurate protection of heat dissipation, improves the stability and life of IGBT work.

The application discloses a coumarin-quinoline hybrid near-infrared fluorescent probe compound for reversibly detecting sulfur dioxide and hydrogen peroxide, a synthesis method and application thereof. The probe takes a coumarin derivative as a fluorescent group and is connected with a quinoline salt through a conjugated chain. The probe itself has weak fluorescence, and after a specific Michael addition reaction occurs between the C-4 position of the quinoline salt unit of the probe and HSO3-, strong near-infrared fluorescence emission is generated at 712 nm, the response time is less than 5 seconds, and the detection limit is as low as 15.5 nM. The addition product can be oxidized by H2O2, the original probe structure is restored, and the fluorescence is quenched, so that reversible detection is realized. The probe has high selectivity and strong anti-interference ability. The probe can be used for quantitatively detecting the content of sulfur dioxide in food and water samples, and is successfully applied to imaging of endogenous and exogenous sulfur dioxide in living cells, monitoring of sulfur dioxide in lipid droplets and reversible cycle imaging of sulfur dioxide and hydrogen peroxide, and has important application value in the fields of food safety monitoring and biomedical research.

The invention relates to a method for dissolving out chloride ions and sulfate ions in sodium diuranate. A method for dissolving out chloride ions and sulfate ions in sodium diuranate comprises the following steps: mixing sodium diuranate and a dilute acid solution, and carrying out microwave extraction to obtain a first extracting solution; and filtering the first extracting solution, and carrying out cation separation treatment to obtain a second extracting solution. According to the method, a microwave extraction sample dissolving method is adopted, and the diffusion of chloride ions and sulfate ions in sodium diuranate into water is accelerated by utilizing electromagnetic waves, so that the chloride ions and the sulfate ions in sodium diuranate are effectively separated, the uniformity of an analysis sample is guaranteed, and the precision and the accuracy of a detection result are improved. According to the method, dilute acid is adopted as an extraction agent, use of chemical reagents and generation of uranium-containing waste liquid are reduced, the influence of chlorine-containing reagents on the detection result is avoided, and the method is safe, environmentally friendly, free of generation of toxic and harmful gas and environmentally friendly.

The utility model relates to the technical field of mining wide-body vehicles, and discloses a mining wide-body vehicle safety auxiliary driving system which comprises a controller and a braking module, and the braking module comprises a gearbox controller interface, a retarder controller interface and a relay control unit. The relay control unit comprises a first-gear relay, a second-gear relay and a third-gear relay, a pin 1 of the gearbox controller interface is connected with a pin 1 of the retarder controller interface, a pin 2 of the gearbox controller interface is connected with a pin 2 of the retarder controller interface through the first-gear relay, a pin 3 of the retarder controller interface is connected with a pin 3 of the retarder controller interface through the second-gear relay, and a pin 2 of the retarder controller interface is connected with a pin 3 of the retarder controller interface through the third-gear relay. And a pin 4 is connected with a pin 4 of the retarder controller interface through a three-gear relay. Combined braking is adopted, when a driver cannot control the vehicle, the controller takes over control over the gearbox controller through the relay control unit, and the situation that the vehicle completely loses the braking capacity is avoided.

The utility model discloses a high-frequency voltage sampling circuit. The high-frequency voltage sampling circuit comprises a precise rectification module, an operational amplifier module and a differential module, the input end of the precision rectification module is connected with AC voltage, and the output end is connected with the input end of the operational amplifier module. The output end of the operational amplifier module is connected with the input end of the differential module; the differential module transmits sampling signals through a pair of differential lines, and signals on the pair of differential lines are equal in amplitude but opposite in phase. Wherein the precise rectification module converts an alternating current input signal into a one-way output signal, negative feedback is used for correcting signal loss possibly caused by diode conduction voltage drop, and the operational amplifier module eliminates signal attenuation and distortion of a signal sampled at the front end and outputs the signal to the next-stage differential module. And the differential module converts the single-ended signal input by the preceding stage into a differential signal and outputs the differential signal for subsequent processing. Differential signals are superior to single-ended signals in the aspects of interference resistance, electromagnetic compatibility, time sequence positioning, anti-noise capability, low power consumption and flexibility.