68results about How to "Short sampling period" patented technology

The invention discloses a self-adaptive fast power voltage regulation system. Two regulation strategies of dynamic voltage and frequency scaling (DVFS) and self-adaptive voltage scaling (AVS) are combined together, and are respectively achieved by two parts of DVFS fast coarse scaling and relatively slow AVS fine scaling. The system is characterized by comprising a main circuit system platform, a frequency regulator lock phase-locked loop RLL, an output power rail line PMOS switch block, an off-chip power management chip PMIC, a performance decision module, an on-chip hardware performance monitoring module, an on-chip DVFS control module and an on-chip AVS control module. According to the method and the self-adaptive fast power voltage regulation system, the working voltage and frequency of a chip are reduced at the same time, the margin of chip voltage is reduced, the influence of fast voltage changes is compensated, and the power consumption spending of the chip is reduced.

The invention discloses a performance diagnosis method for a fuel cell. The method comprises the following steps: introducing an impedance secant angular difference value delta alpha as a performancediagnosis judgment index of the fuel cell; using an improved electrochemical impedance spectroscopy method to solve to obtain the current impedance secant angle alpha t; at the same time, based on anestablished model, calculating to obtain a secant angle alpha 0 under the normal condition under the current density, temperature and humidity currently by a controller; and judging the current watermanagement state of the fuel cell by the controller according to the difference value delta alpha of the two secant angles, and generating a control signal to perform humidity adjustment on the fuel cell, so as to ensure that the fuel cell is in a normal working condition. The performance diagnosis method for the fuel cell provided by the invention can quickly and accurately judge the water management state of the fuel cell and recover the performance of the fuel cell under the condition of only using an alternating current signal generator and a data acquisition system, and improve the outputperformance of the fuel cell.

The invention relates to a logistics monitoring anti-theft system based on an FRID and the 3G technology. The logistics monitoring anti-theft system is characterized in that the system is composed of an RDIF system, a vehicle-mounted information terminal, a wireless communicating link and a monitoring center; the RFID system is composed of an electronic label and a card reader, the card reader scans the electronic label automatically wirelessly and stores scanned information into the vehicle-mounted information terminal and at the same time, the RFID system stores vehicle position information obtained through the 3G technology into the vehicle-mounted information terminal; the monitoring center is provided with a central information database, the monitoring center is communicated with the vehicle-mounted information terminal in real time through the wireless communicating link to obtain vehicle position and goods state information and monitors vehicle running. The FID and the 3G technology are adopted in the logistics monitoring anti-theft system, all-round, uninterrupted and high-precision monitoring to vehicles can be conducted, and users can know the whereabouts of the vehicles at any time.

The invention discloses a vibration output force following control device which comprises a mechanical body module, an alternating-current servo motor driving module and a control module. The invention further discloses a control method of the vibration output force following control device. The control method comprises the following steps that 1, a controller sets vibration output force signals needing to be tracked, and sets a control system sampling period; 2, the controller acquires the acceleration signals of a workbench from an analog input module, and displacement signals of the workbench are acquired from an incremental encoder interface terminal module; 3, the collected signals are processed by the controller to generate control output signals; 4, after D / A conversion is carried out the output signals generated by the controller through an analog output terminal module, voltage signals from -10 V to +10 V are generated to control an alternating-current servo motor to move. The device and the method have the advantages of reducing the phase errors of the output force signals, reducing output force signal distortion and the like.

The invention relates to a novel multi-channel solar cell module test system and a double intelligent scan method. The test system includes a plurality of solar cell module test units, an alternating current power supply, an industrial control computer and communication lines, wherein the alternating current power supply is connected with the plurality of solar cell module test units and the industrial control computer, and the industrial control computer is connected with the plurality of solar cell module test units through the communication lines. The novel multi-channel solar cell module test system in the invention uses a constant current source electronic load in a solar energy data collector to apply a double intelligent scan method under actual sunlight and atmospheric conditions, so as to realize synchronous and real-time measurement of module parameters of a plurality of solar cell modules, the industrial control computer obtains, processes and stores measured data of the module parameters through the solar cell module test units, outputs an I-V curve, temperature data and a P-T curve of a maximum power point within 24 hours of each solar cell module. The novel multi-channel solar cell module test system in the invention has the advantages of short test time, real test conditions and environment, low cost and the like, and is suitable for large-scale market promotion.

The invention discloses a ball bladder sampling device and a sampling method. The ball bladder sampling device comprises a flue (2), a sampling gun (1), a sucking pressure pump (3), an air intake and collecting pipe (4), a ball bladder, an air exhaust and collecting pipe (8) and an air sampling hose (9), wherein the sampling gun (1) is arranged at the section of the flue (2), the sucking pressure pump (3) is connected with the sampling gun (1), the air intake and collecting pipe (4) is connected with the sucking pressure pump (3), the ball bladder is connected with the air intake and collecting pipe (4), the air exhaust and collecting pipe (8) is connected with the ball bladder, and the air sampling hose (9) is connected with the air exhaust and collecting pipe (8) and extends outside a wall body (10). The sampling method utilizing the ball bladder sampling device comprises four steps. The sampling method adopts a way of double-ball-bladder sampling, and the ball bladder always keeps the positive pressure status, does not have a phenomenon of inleakage of air and does not need repeated self cleaning. The sampling period (the time needed by completing one-time ball bladder sampling) adopting the double-head ball bladder is saved by 85% compared with the single-head ball bladder sampling method. On the basis of simple operation and low use cost, the sampling method meets the sampling requirements for real time, accuracy and safety.

The invention discloses a data collection analysis system based on Mitsubishi MELPLAC 2000 and belongs to the field of data processing. Due to construction of Ethernet, the data collection analysis system based on Mitsubishi MELPLAC 2000 establishes communication connection relation with a man-machine interface of an industrial personal computer, solves the problem that the industrial personal computer is lack of a private data transmission port, achieves real-time collection of operation state data of a site device, can connect a data collector of a third party personal digital assistant, greatly reduces cycle of data collection, achieves fast cycle of sampling of the data collection system, avoids possibility of omission of collection of the real time data, and enables all the areas of a production line to monitor relevant real time operation state data of the industrial personal computer control system. The data collection analysis system based on Mitsubishi MELPLAC 2000 is simple in framework, easy to achieve, large in data points capable of being collected, and capable of being widely used in data collection, analysis and monitoring area of the Mitsubishi MELPLAC 2000 industrial personal computer control system.

The invention discloses an airborne aerosol particle vertical observation system based on an unmanned aerial vehicle, and an airborne aerosol particle vertical observation sampling method, the systemcomprises an unmanned aerial vehicle airborne platform system, an unmanned aerial vehicle ground control platform, a ground data collecting and processing center system and a ground data collection and comparison system; the sampling method comprises: causing a four-bladed propeller light-weight unmanned aerial vehicle to perform automatic hovering and flying according to a preset height and routewhile carrying a portable laser pump type aerosol particle parameter measuring instrument, various weather sensors and an optical image shooting device, the mass concentration and number concentration of vertical atmospheric aerosol particles in a specific target airspace, and atmospheric environment parameters such as temperature, pressure, humidity and the like, and optical image data can be continuously measured, the collected data are sent to the ground data collecting and processing center through a wireless protocol, and the ground data collection and comparison system completes the display, analysis and processing of the data after performing quality control. The entire system is compact in structure, easy to control and adjust, high in system stability and low in cost.

The invention discloses a large-flow sampling device for industrial flue gas particulate matters. The large-flow sampling device comprises a sampling gun, a filter device, a flow rate metering device, a diluting and cooling device, a water cooling device and a vortex gas pump which are connected through a pipeline in sequence, wherein the filter device comprises an upper taper cylinder and a lower cylinder which are symmetrically arranged up and down, the diameter of the upper tape cylinder is gradually increased from top to bottom, a supporting ring is clamped between the upper taper cylinder and the lower taper cylinder, a groove is formed in the bottom of the supporting ring, a filter film and a supporting plate of the filter film are arranged in the groove of the supporting ring from top to bottom in sequence, the filter film and the supporting plate are clamped and pressed between the upper taper cylinder and the supporting ring; the upper end of the upper taper cylinder is connected to the sampling gun through a hose I; the lower end of the lower taper cylinder is connected to the flow rate metering device through a hose II; the aperture ratio of the supporting plate is greater than 50%; an accumulative integrating instrument is attached to the flow rate metering device. The large-flow sampling device can be used for quickly realizing large-flow sampling of particulate matters of low-concentration emission source flue gas.

The invention relates to a PID control algorithm for double differential passages for a speed regulator of a water pumping and energy storing unit. The PID control algorithm comprises two differential passages with same structures. The sampling period of a first differential passage is comparatively short, while the sampling period of a second differential passage is comparatively long. The algorithm treats a quick change part and a slow change part of frequency separately, namely, adopting the first differential passage at the quick change part and adopting the second differential passage at the slow change part, so that a differential link functions within a wider regulating range all the time, and the rotating speed of the unit can have less fluctuation nearby a network frequency value. The PID control algorithm for the double differential passages effectively solves the problem that the prior PID control algorithm has larger differential dead area after discretization and the problem of effectively regulating narrow bandwidth, improves stability of the water pumping and energy storing unit during idle running at low water head, reduces influence of S-shaped characteristics to stable running of the water pumping and energy storing unit, and improves high-frequency interference inhibiting capability of the speed regulator of the water pumping and energy storing unit at the same time.

The invention provides a device for acquiring the voltage and current of a capacitive photovoltaic cell. The device comprises a sampling module, a voltage signal measuring module, a current signal measuring module, an MCU (Microprogrammed Control Unit) signal processing module and a manual gear selecting module, wherein the manual gear selecting module is used for selecting a measured gear according to the parameters of a measured photovoltaic cell, a gear selecting signal is sent to the voltage signal measuring module and the current signal measuring module through the MCU signal processing module to determine the measured gear; the sampling module samples the acquired voltage and current signals of the output end of the photovoltaic cell and respectively transmits to the voltage signal measuring module and the current signal measuring module for amplification and filtration processing, and the processed signal is sent to the MCU signal processing module to be processed and then uploaded to superior monitoring equipment for use. The device provided by the invention has the advantages of simple circuit structure, lower cost, high sampling accuracy, short sampling period and good working stability, and is convenient to operate.

The invention discloses a determination method for the chromium content of inhalable particles in soil dust. The determination method includes the following steps of sample extraction, sample pretreatment, acid removal and volume metering, preparation of a standard blank solution and a standard working solution, and graphite furnace atomic absorption spectrometry determination. The invention further discloses a detection method for the accuracy of the determination method for the chromium content of inhalable particles in soil dust. The detection method includes the following steps that a national standard substance with the known chromium content is prepared into five parts of sample solutions to be detected, wherein the concentrations of the sample solutions to be detected are different; the chromium content in each sample solution to be detected is detected with the determination method for the chromium content of inhalable particles in soil dust so that the precision of the determination method for the chromium content of inhalable particles in soil dust can be verified. The determination method and the detection method have the advantage that sampling time is short, digestion is fast, little interference exists in determination, and the result is accurate and reliable.

The invention discloses an electric power system energy storage control method of large-scale photovoltaic access. The method comprises following steps that step 1, a photovoltaic power station is connected into a power transmission network and a power distribution network according to output voltage grade, a power-type energy storage system is configured in the power distribution network and an energy-type energy storage system is configured in the power distribution network; step 2, the power-type energy storage system adopts a double moving average algorithm to calculate an energy storage charging and discharging strategy, and stabilize short-time fluctuation of output power of the photovoltaic power station accessed to the power distribution network; and step 3, the energy-type energy storage system firstly carries out power generation detection on the photovoltaic power station accessed to the power transmission network and the power distribution network, carries out load prediction on the load accessed to the power distribution network so as to obtain a predicted photovoltaic output curve and a predicted load curve, then adopts a prediction control method, makes a daily operation plan, stores energy during photovoltaic power releasing period and generates power during load period at night.

The invention relates to the field of chemical industry manufacturing, and provides a method and device for rapidly judging the operation stability of a chemical industry production device. The method includes the steps of data acquisition, weight allocation, data collection, stable state criterion calculation, real-time data acquisition, data filtering, current stable state value calculation and stability judgment. The device comprises a weight allocation module, a data acquisition module, a data collection module, a data filtering module, a data calculation module and a judgment module. According to the method and device, weight allocation is performed, different variables are comprehensively considered, in a real-time database storage system, acquisition and storage of related data are achieved through a connector with the chemical industry production device, online high-pass filtering and low-pass filtering of key technology control points are achieved through the data filtering module, calculation of a stable state criterion value and a current stable state value is achieved through the data calculation module, and then whether a current operation state is a stable state or an unstable state is rapidly identified through the judgment module.

The invention discloses a hand-held soil rapid detector and a detection method, and relates to the technical field of detection. The technical scheme is that the hand-held soil rapid detector comprises a microprocessor; an input end of the microprocessor is connected with a sensor group through an analog-to-digital converter; an output end of the microprocessor is respectively connected with a display module and a wireless transmission module; and the wireless transmission module is connected with the cloud server to form a wireless channel. The invention further discloses a soil nitrogen phosphorus potassium concentration detection method and a soil humidity acquisition method, so that rapid soil detection is realized. The hand-held soil rapid detector provided by the invention has the beneficial effects that the scheme integrates functions of wireless transmission, low power consumption, portable, no installation, geographic position identification, timely feedback and the like, canrealize rapid acquisition and feedback of various information of soil temperature, humidity, conductivity and nitrogen phosphorus potassium contents, and is convenient to use, low in price and excellent in cost performance.

The invention discloses a method for sampling from long-axle workpieces by high frequency quenching metallographic examination, belonging to the technical field of electromechanical device manufacture and aiming to overcome the defect of the damage of the high frequency quenching metallographic examination in the traditional long-axle workpieces to the workpieces. In each bath production, a small block of material workpiece with the same material as the workpieces is taken as a sample; the excircle of the material workpiece is processed to the size completely same as that of the excircle of the workpiece; the material workpiece is arranged between two aluminum bars; after clamped with the sample, the overall dimension of the aluminum bars is ensured to be completely same as the size of an actual workpiece; in the intermediate-high quenching, an aluminum material does not generate magnetoelectric effect, thus the aluminum material can be reused; and the material of a workpiece sample clamped between the aluminum bars is same as that of the workpiece and parameters of the workpiece sample during quenching are also same as the parameters of the actual workpiece, thus the problem of batch workpieces can be found by analyzing the workpiece sample.

The invention provides a bias voltage output circuit and a driving circuit. The bias voltage output circuit comprises a bias voltage output module used for outputting bias voltage under the action ofa logic control module, and the bias voltage is used for driving an audio output device; a filter capacitor which is used for filtering noise generated by the bias voltage output module in the bias voltage output process and storing electric quantity in the bias voltage output process of the bias voltage output module; a discharging module which is used for discharging the electric quantity storedby the filter capacitor under the action of the logic control module; a logic control module which is used for outputting audio signals to an audio output device when determining that the audio output device accesses audio playing equipment, triggering the bias voltage output module to output the bias voltage, controlling the discharge module to forbid discharging the electric quantity stored bythe filter capacitor, triggering the bias voltage output module to stop outputting the bias voltage when determining that the audio output device is disconnected with the audio playing equipment, andcontrolling the discharge module to discharge the electric quantity stored by the filter capacitor.

The invention discloses a harmonic current suppression method based on a 1.5-order hybrid repetitive controller, and the method comprises the steps: firstly building a magnetic suspension rotor kinetic model containing unbalance and sensor harmonic disturbance, and proposing a structure with three compensation channels connected in parallel by combining with fractional order repetitive control; according to the invention, odd harmonics and even harmonics can be independently eliminated by controlling a gain factor, only 0.5 N sampling periods are needed, the system delay is reduced, the dynamic response of the system is accelerated, the anti-interference performance of an algorithm is improved, and the suppression of the harmonic current of the system can be effectively realized.

The invention relates to a lesion area imaging system and method. The system comprises a signal source module, a transmitting antenna array module, a receiving antenna array module, a signal control module and an image processing module. The signal source module is used for generating a pulse signal. The transmitting antenna array module is used for transmitting the pulse signal to a lesion area. The receiving antenna array module is used for receiving a first echo signal which is generated for the pulse signal. The signal control module is used for carrying out time inversion on the first echo signal to acquire an inversion signal. The transmitting antenna array module is further used for transmitting the inversion signal to the lesion area. The receiving antenna array module is further used for receiving a second echo signal which is generated for the inversion signal. The signal control module is further used for extracting target information in the second echo signal. The image processing module is used for carrying out imaging according to the target information. The signal-to-noise ratio is improved, and the image quality is improved.

The invention relates to a high-precision equal sampling system and method for harmonic measurement of a digital power meter, the high-precision equal sampling system comprises a power supply module, an operation processing module, a measurement control module and a plurality of sampling modules, the operation processing module, the measurement control module and the sampling modules are respectively connected with the power supply module, and the measurement control module is connected with the sampling modules. And the operation processing module is connected with the measurement control module. According to the high-precision equal sampling system and method for harmonic measurement of the digital power meter, the input signal is subjected to precise frequency multiplication output through the method, the sampling position in each period is precisely controlled, the quality of each characteristic sampling point is improved, the sampling period is shortened, the sampling speed and precision are improved, and the sampling efficiency is improved. Therefore, the harmonic measurement analysis requirement of the input signal is met.

The invention discloses a master-slaver multiprocessor real-time signal analyzing method, which adopts a master processor and N slave processors to carry out, wherein the mater processor adopts T seconds as a sampling period for timely sampling a measured signal and obtaining the sampling data. An iterative method is utilized to directly obtain a direct-current component x0; the value of a positive integer k is set in N slaver processors, wherein the numerical values for setting N*K frequencies are gradually increased and are positive numbers not greater than 2*pi / T as follows: omega11, omega 12,..., omega 1K, omega 21,..., omega NK; the iterative method is utilized to obtain N*K alternating-current components of x11, x12,..., x1K, x21,..., and xNK, and N*K orthogonal components of z11, z12,..., z1k, z21,..., zNK; and N*K estimation amplitude values of a11, a12,..., a1K, a21,... and aNK are calculated. The master-slaver multiprocessor real-time signal analyzing method provided by the invention has a relatively simple algorithm structure, relatively small calculation amount and relatively short operation time.

The invention discloses a radon acquisition device and a method. The device comprises an acquisition box, an acquisition rack and a sealing box. The acquisition box is a cylindrical acquisition box. Two shaft end faces of the cylindrical acquisition box are formed by filtering nets. The interior of the cylindrical acquisition box is filled with activated carbon. The hole diameter of one net hole of each filtering net is smaller than the particular diameter of the activated carbon. The acquisition rack comprises a trapezoid base. The short edge of the trapezoid base is connected with a collecting rack wherein the acquisition box is embedded. The sealing box is used for sealing the acquisition box in the non-sampling state therein. The sealing box comprises a box body and a box cover. The box body and the box cover are in threaded connection with each other to form a sealing space. According to the invention, it is achieved that the acquisition box carries out double faced acquisition; the thickness of the acquisition box is proper; the shielding effect of outer layer activated carbon on the radon adsorption ability of the inner layer activated carbon can be neglected; the whole activated carbon can be allowed to uniformly absorb radon; and the accuracy of measurement results is improved.

The invention discloses a sparse GPS sampling point based method and device for fine moving track reduction. The method includes the following steps: step 1, collecting the station data and track dataof several shifts of public transport vehicles in the same line during operation through a vehicle terminal data acquisition unit; step 2, selecting one shift as a reference shift; step 3, constructing a track point model M for the track data according to the station data and the time parameters of the track data; step 4, judging whether a track point is a turn point; step 5, performing interpolation on the turn point; and step 6, performing interpolation on other track points. Through the method, effective bases can be provided for the management and decision of public transport companies, costs can be reduced, influences of weak GPS signals can be eliminated, and sampling periods can be greatly shortened; and a new precise line track can be generated through fast fitting by only drivingvehicles on a set track for several times.

The present invention discloses fully automatic oil fume detection equipment, and relates to the technical field of oil fume detection equipment, wherein the fully automatic oil fume detection equipment comprises a constant velocity sampling gun, a flue gas conveying pipeline, and a detection equipment body. According to the present invention, oil fume sample gas sampled by the constant velocity sampling gun enters the detection equipment body through the flue gas conveying pipeline; the oil fume sample gas is filtered by a steel wire filtration cylinder; the filtered gas is discharged out of the equipment; after the sampling period is ended, a micro-computer automatically controls to complete solvent injection, ultrasonic wave flushing of the steel wire filtration cylinder, infrared spectrophotometry detection, multi-parameter conversion correction and other procedures; finally the oil fume concentration detection result is output.

The invention relates to an infrared touch screen circuit suitable for strong ambient light. The infrared touch screen circuit comprises a plurality of controlled infrared luminous sources, a plurality of infrared receiving sensors and signal processing circuits thereof corresponding to the controlled infrared luminous sources, and a main controller, wherein the main controller is independently connected with the controlled infrared luminous sources and the infrared receiving sensors and signal processing circuits thereof; the main controller controls the plurality of controlled infrared luminous sources to carry out quick switch switchover; and the infrared receiving sensors and signal processing circuits thereof receive the signal of the controlled infrared luminous sources (1), and filter ambient light components in the signal. Compared with the prior art, the infrared touch screen circuit has the advantages of wide applicable range, low implementation cost, simple circuit structure, high performance and the like.

The invention discloses a lead-resistance-removed resistance signal source and a resistance measuring system thereof. The resistance signal source comprises a standard resistor, a first voltage-controlled voltage source and a second voltage-controlled voltage source; two ends of the standard resistor are connected with a first connecting line and a second connecting line; free ends of the two connecting lines are respectively equipped with a first interface and a second interface; reverse phase input ends of the first voltage-controlled voltage source and the second voltage-controlled voltage source are respectively equipped with a third interface and a fourth interface; the first voltage-controlled voltage source and the second voltage-controlled voltage source are amplified -1 times and are respectively used f or removing the resistance of the leads at two ends. The resistance measuring system comprises the resistance signal source and a measuring device; the measuring device is connected with the first interface, the second interface, the third interface and the fourth interface of the resistance signal source through a first lead, a second lead, a third lead and a fourth lead. The resistance signal source and the resistance measuring system therefore are simple to wire and short in sampling time.

The invention provides a portable line fault monitoring / analyzing recorder. The portable line fault monitoring / analyzing recorder comprises a voltage type signal acquisition device, a paperless recorder, a voltage converter and a current transformer; the voltage type signal acquisition device is connected with the voltage converter, the voltage converter is connected with the paperless recorder by use of a wire, and the paperless recorder is connected with the current transformer; a signal acquired by the voltage type signal acquisition device is sent to the voltage converter and converted into a DC signal by the voltage converter, and the DC signal is sent to the paperless recorder; a current signal is detected by use of the current transformer of a split core type, and the split core type current transformer outputs a DC signal which directly goes into the paperless recorder; the paperless recorder records voltage and current signal curves. The portable line fault monitoring / analyzing recorder has the advantages of easy fault detection point connection, diversified detection ways, long voltage and current curve recording time and short curve sampling period, and further is capable of quickly realizing monitoring on a continuous-production automatic system out of order temporarily and analyzing the part out of order of a detected device by use of the curves recorded by the paperless recorder. The portable line fault monitoring / analyzing recorder is simple to operate and convenient to carry and use.

The invention discloses a method for measuring the calcium contents of inhalable particles in building construction dust.The method includes steps of extracting samples; pre-treating the samples; carrying out evaporation volume setting; preparing standard blank solution and standard working solution; measuring the calcium contents by means of graphite furnace atomic absorption spectrometry.The invention further discloses a method for detecting the accuracy of the method for measuring the calcium contents of the inhalable particles in the building construction dust.The method for detecting the accuracy includes steps of preparing five portions of to-be-tested sample solution with different concentrations from national standard substances with known calcium contents; respectively detecting the calcium contents of the to-be-tested sample solution by the aid of the method for measuring the calcium contents of the inhalable particles in the building construction dust, and verifying the accuracy of the method for measuring the calcium contents of the inhalable particles in the building construction dust.The methods have the advantages of short sampling time, high digestion speed, little measurement disturbance, accurate and reliable results and the like.

The invention provides a driver brake strength identification method based on double fuzzy control. The method comprises the following steps: 1, acquiring a brake pedal pressure signal through a brakepedal pressure sensor, acquiring a wheel angular speed signal through a wheel speed sensor, and acquiring a brake pedal displacement signal through a brake pedal displacement sensor; 2, based on thesignals, obtaining the brake pedal pressure change rate, the wheel linear speed and the wheel deceleration through calculation; 3, preliminarily recognizing the brake intention based on fuzzy controlby taking the brake pedal pressure change rate, the wheel deceleration and the brake pedal displacement as input variables; 4, selecting a sampling period of the brake pedal displacement according tothe recognized driver brake intention; and 5, obtaining the brake strength based on fuzzy control by taking the brake pedal displacement and the brake pedal speed as input variables. According to theinvention, the problems of large pedal speed calculation error and low brake intensity identification precision during emergency brake in the existing research are effectively solved.