548 results about "Oscilloscope" patented technology

The invention discloses a POL power supply automatic test method based on modular design, and belongs to the technical field of power supply test. The method comprises the following steps: firstly, under the control of an upper computer, automatically reading POL power supply basic parameters including key characteristic parameters such as input / output voltage, rated current and frequency from a preset Excel table, and establishing a judgment reference for testing; then, instrument initialization is completed, communication connection with test equipment such as an oscilloscope, an electronic load and a direct-current power supply is established, and configuration of initialization function parameters is completed; then, executing a measurement task of each core parameter of the POL power supply to be tested, and in the test process, executing a parallel measurement management mechanism, namely configuring each instrument parameter and channel state in real time according to a specific test item, and triggering a retry or interrupt logic under the conditions of communication abnormality, data timeout and the like until the test recovers a running state; and finally, after the test is completed, performing Excel storage and interaction on the standardized test data and the waveform screenshot, and finally safely exiting. According to the POL power supply automatic test method based on the modular design, the whole test process is divided into a plurality of serial or parallel function processing units such as parameter reading, instrument initialization, test execution and test management, data storage and interaction and the like, and high efficiency and usability of a test system are achieved.

The invention relates to a long-gap discharge leader development speed measurement method based on radiated electromagnetic wave detection. The method comprises a set of high-frequency antennas and a high-speed oscilloscope and a long-gap discharge leader development speed calculating method. The method adopts a certain antenna arrangement form; long-gap discharge radiated electromagnetic wave pulse time is detected simultaneously through the plurality of antennas; leader head position is positioned according to time difference of a signal arriving at different antennas; and furthermore, the long-gap discharge leader development speed can be calculated. The method can effectively improve the measurement precision of the discharge leader development speed, and resolution reaches the level of 0.1 ns.

The invention relates to the technical field of data analysis, and provides a CAN bus waveform message analysis method, device and equipment and a medium, and the method comprises the steps: issuing an operation instruction carrying a preset operation parameter to an oscilloscope; in response to waveform data fed back by the oscilloscope, storing the waveform data as a message file in a preset format; analyzing and converting the message file according to the data head structural body identified by the oscilloscope to obtain a message array; performing time domain segmentation, normalization processing and de-noising processing on the data in the message array by using a Numpy library to obtain a message signal; and performing error frame screening on the message signal by adopting a strategy of supplementing one after five, and performing layer-by-layer analysis on the screened message signal based on a CAN protocol structure to obtain message analysis content. According to the invention, through the software design of the whole process, a universal scheme is adopted from data acquisition, storage and analysis to signal processing and message generation, so that the analysis universality of the CAN bus waveform message is effectively improved.

The invention provides a probe frequency response calibration parameter determining method, a probe frequency response calibration parameter measuring system and a storage medium, and the probe frequency response calibration parameter determining method introduces a composite test signal including a steady-state frequency sweep signal and a transient pulse signal. De-embedding calculation is carried out on a data set which is obtained under the two conditions that a probe is not connected to a calibration system and the probe is connected to the calibration system and responds to the same test signal, namely amplitude division is carried out to eliminate link gain deviation, phase subtraction is carried out to strip channel phase deviation, accurate extraction of the independent frequency response characteristic of the probe is achieved, and the accuracy of the independent frequency response characteristic of the probe is improved. Therefore, the frequency response calibration parameter of the probe is determined. According to the invention, system errors introduced by a test environment and a rear-end measurement link are eliminated, the calibration precision of the amplitude-frequency characteristic and the phase-frequency characteristic of the probe in a full working frequency band is improved, and a reliable basis is provided for implementation of accurate real-time anti-distortion compensation in actual signal acquisition of measurement equipment such as an oscilloscope and the like; and the reduction authenticity of the whole measurement system in the high-frequency and broadband signal test is ensured.

The utility model provides a test system for a power device, and the system comprises power equipment which is used for applying high-voltage excitation between a source electrode and a drain electrode of the power device; the semiconductor parameter analyzer is used for applying bias voltage to the grid electrode of the power device; the oscilloscope is combined with the current probe to measure the drain current of the power device; and the upper computer is used for controlling the working time sequence of the power supply equipment and the semiconductor parameter analyzer so as to realize the scanning test of the device parameters. By combining the high-voltage power supply, the oscilloscope and the general semiconductor parameter analyzer, the performance of the power device under different voltage and current conditions can be comprehensively evaluated, the reliability and stability of the device in practical application are ensured, and the test cost is also considered.

The invention relates to the technical field of data security, in particular to a CPA-based SMBA encryption algorithm side channel attack method and related equipment, and the method comprises the steps that a collection probe and a programmable oscilloscope are used to collect side channel leakage information when a cryptographic chip runs an SMBA algorithm, and the side channel leakage information comprises a power consumption curve, a current curve or an electromagnetic signal; selecting a result of whitening transformation in a round function of the SMBA encryption algorithm as an intermediate value, calculating the result of whitening transformation in the encryption process for each input data and the assumed encryption sub-key, and constructing an intermediate value set; performing correlation analysis by using the side channel leakage information and the intermediate value set to deduce an encryption sub-key of an SMBA encryption algorithm; the invention provides an effective security assessment means for the practical application of the SMBA encryption algorithm.

The invention provides a multi-gas sensing detection method and device based on microwave modulation FLRD, the multi-gas sensing detection device is built based on microwave modulation FLRD, and the method comprises the following steps: determining characteristic frequency and shortest switching time; establishing a multi-wavelength absorption physical model; a gas concentration vector is solved by adopting a regularization inversion algorithm, and regularization parameters are optimized through cross validation; and temperature compensation is realized through an adaptive Kalman filtering algorithm. Compared with a traditional time domain pulse measurement mode, the method can accurately obtain the intra-cavity ring-down time without a high-speed pulse light source and an oscilloscope. According to the method, a network vector analyzer is used for extracting a system transfer function, high-sensitivity and low-noise gas absorption measurement is realized, and the system cost and complexity are remarkably reduced. Parallel recognition of multiple gas components can be realized through frequency domain analysis and a regularization inversion algorithm; and the Kalman filtering algorithm with temperature compensation is combined, so that the measurement stability and the environmental adaptability are effectively improved.

The invention discloses an EOS peak voltage detection device, and belongs to the technical field of circuits. The detection signal access module accesses a plurality of detection contact signals to the signal attenuation and protection module, the signal attenuation and protection module attenuates the voltage of the detection signals by a fixed multiple, and the peak voltage detection module captures the peak voltage of positive and negative pulses and converts the peak voltage into analog DC voltage. Detection results of the multiple paths of peak voltage detection modules are converged into the same voltage acquisition module, the voltage acquisition module carries out sampling conversion on the detection results, the EOS peak voltages of multiple detection contacts are detected at the same time, the data display and storage module displays the detection results in real time, and the position of a risk source is positioned and reported according to the detection results. According to the EOS peak voltage detection device, the number of detection contacts is not limited by the number of oscilloscope channels, online detection can be systematically carried out on a plurality of monitoring objects, the detection result is reported in real time, and an EOS risk source is rapidly identified.

The invention relates to the technical field of jitter analysis, in particular to a high-speed oscilloscope eye diagram real-time jitter detection method and system, and the method comprises the following steps: carrying out high-speed collection waveform zero-cross detection to obtain a timestamp, calculating offset grouping to obtain a cross-period edge time sequence, merging a jump cluster according to a sequence hierarchy cluster, calculating offset, obtaining a drift trend vector, and calculating the jitter of the drift trend vector; and based on the trend vector distribution compensation weight, weighting and correcting the time coordinate, calling a corrected coordinate detection period boundary to calculate a difference value exceeding a threshold value, triggering correction to obtain a period correction rear edge coordinate, and extracting a jitter frequency amplitude according to corrected coordinate Fourier analysis to generate an eye pattern jitter detection result. Phase correlation is established based on a cross-period sequence, an analyzable offset mode is formed through a clustering identification distribution structure, accumulated deviation is suppressed through a drift trend and weight correction, an abnormal period is calibrated through period dynamic discrimination, and the relation between a jitter structure and amplitude is separated through frequency analysis, so that the overall stability and integrity are enhanced.

The invention relates to the technical field of signal testing, and provides a Web-based PCIe signal testing method, device, system, equipment and medium, and the method comprises the steps: receiving a structured test task file uploaded by a user based on a Web front end, analyzing and extracting a to-be-tested combination parameter, and generating a test task queue; for each test task in the test task queue, calculating a target pulse count value required by PCIe preset parameter switching of the to-be-tested device, controlling the signal generator to output a corresponding target pulse signal, and triggering the to-be-tested device to be switched to a target state; for each test task, configuring oscilloscope parameters, loading a matched link loss simulation file, and controlling an oscilloscope to automatically collect and standardly store waveform data; automatically analyzing the waveform data, and extracting key index data; and filling the key index data into the test report template to generate a target test report. Through the technical scheme, the test efficiency is improved, and the accuracy and consistency of the test are ensured.

A method for measuring even / odd jitter (EOJ) in digital signals includes receiving a signal under test (SUT), where the SUT includes a waveform of even symbols and odd symbols constituting an even-length test pattern. The method further includes generating a first pulse-fit vector for the even symbols of the waveform and a second pulse-fit vector for odd symbols of the waveform, and determining the EOJ of the SUT by measuring and comparing respective widths of the first and second pulse-fit vectors.

A kind of electromagnetic valve delay time and response time testing device, including test bench, and electromagnetic valve fixed on test bench by fixing plate, the electromagnetic valve includes electromagnetic valve spool and controller, the controller of electromagnetic valve is connected with host computer by signal line;Left contact plate and right contact plate are installed on the side close to electromagnetic valve spool on the test bench, and the side opposite left contact plate and right contact plate is correspondingly provided with upper contact and lower contact;The electromagnetic valve spool is connected with valve core connecting rod by screw thread, and the other end of valve core connecting rod is fixedly installed with contact iron block that is contacted with upper contact and lower contact;The upper contact and lower contact are connected with the two ends of resistance R respectively by wire, and the two ends of resistance R are connected with the channel one of oscilloscope respectively by wire, and the voltage value of the two ends of resistance R is collected by channel one of oscilloscope;The channel two of oscilloscope is connected with host computer by pulse width signal line, and the pulse width signal of electromagnetic valve is collected.

The present application relates to a device for testing electrical performance parameters of bipolar transistors, comprising a test fixture for operatively mechanically and electrically coupling a bipolar transistor to be tested, a test circuit for applying a test input signal to the transistor under test, a measurement circuit for measuring an output signal of the transistor and determining electrical performance parameters thereof, and a controller for automating the testing process and analyzing the measurement data, wherein the test fixture has fluid cavities formed through its length by one or more flow holes, and at least one cooling section in the form of a uniform or non-uniform spiral is arranged in each fluid cavity to extend along the corresponding fluid cavity. The test circuit comprises a signal generator for generating the input signal and a power supply for providing necessary bias voltages to the transistor; the measurement circuit comprises an oscilloscope for measuring the output signal and a computer for processing the measurement data; the controller is capable of automatically acquiring and analyzing the measurement data of the transistor to determine the electrical performance parameters.

This invention discloses a downconversion fluorescence thermometry method based on bilinear mode, implemented using a hardware system. The hardware system includes a 280nm light-emitting diode, two convex lenses, and a Tb... 3+ :Cs2Na 0.9 Ag 0.1 The system comprises InCl6 temperature-sensing material, a grating spectrometer, an oscilloscope, a signal generator, a computer, and a thermostat. The specific implementation steps are: signal excitation and acquisition; temperature calibration; actual temperature measurement; and high measurement accuracy: VPR mode linear correlation coefficient R² ≥ 0.998, FL mode linear correlation coefficient R² ≥ 0.992, avoiding measurement errors introduced by the exponential bias or correction term of traditional FIR technology, thus fundamentally improving temperature measurement accuracy.

The utility model relates to the technical field of integrated circuit testing, and particularly discloses an integrated circuit experiment testing device which comprises a shell. A microcontroller, and a digital oscilloscope, a function generator, a digital logic analyzer, a pattern generator, a virtual digital I / O interface, a front PCB panel and a plurality of test interfaces which are electrically connected with the microcontroller are arranged in the shell; the front end of the shell is provided with a voltage acquisition interface, a current acquisition interface, a display screen and a plurality of voltage output ports which are electrically connected with the front PCB panel, the bottom of the shell is provided with an air inlet, a cooling fan is arranged above the air inlet, and the middle part of the shell is provided with a middle air outlet. According to the utility model, a plurality of instruments and meters are integrated to carry out experimental testing, so that the device is convenient to operate and overhaul, smaller in size and small in occupied space, meets the requirement of carrying out rapid testing in a limited space, and is suitable for design, simulation, manufacturing and testing of integrated circuits and related experimental teaching and scientific research activities.

The application discloses a CS101 testing device and method suitable for GJB151 standards, and relates to the technical field of testing devices, and specifically discloses a testing device, which comprises a control module, a waveform generating module, an analog-digital conversion module and a high-speed multiplier module, wherein the control module is connected to the waveform generating module, the analog-digital conversion module and the high-speed multiplier module; the waveform generating module and the analog-digital conversion module are respectively connected to the high-speed multiplier module, and the high-speed multiplier module is used for outputting ripple. The testing device and the testing method of the application replace the complicated manual control of the measuring range and other parameters of an oscilloscope or a receiver by a tester, save a large amount of manpower and time cost, do not need to replace different filters according to different testing frequencies, reduce cost and save time, avoid measurement errors caused by replacement of different filters, reduce the cost of purchasing a signal source, and do not need manual operation, so that complete automatic control of signals is realized.

The invention provides an ultrasonic particle size detection system for coal slurry. The ultrasonic particle size detection system comprises a fixed frame; a coal slurry container; a stirring device; a degassing device; a particle size detection device; a signal generator and an oscilloscope. The invention provides a coal slurry ultrasonic particle size detection method. The coal slurry ultrasonic particle size detection method comprises the following steps: carrying out ultrasonic particle size detection on clear water to obtain a clear water attenuation amplitude; performing ultrasonic particle size detection on the coal slurry subjected to degassing treatment to obtain a coal slurry attenuation amplitude; calculating a coal slurry ultrasonic attenuation coefficient according to the clear water attenuation amplitude and the coal slurry attenuation amplitude; and performing inversion on the coal slurry ultrasonic attenuation coefficient by utilizing Monte Carlo simulation prediction and a particle swarm optimization method to obtain the coal slurry ultrasonic particle size distribution. According to the invention, coal slurry degassing and granularity detection are systematically realized, and the problems of difficulty in online detection of coal slurry granularity and bubble interference are fundamentally solved.

This technology provides a mechanism for monitoring power systems and outputting a predetermined value if an abnormality occurs within the power system. [Solution] The monitoring device 2 includes, as its function, an acquisition unit 231 that acquires waveform data from an oscilloscope device 3 that acquires and outputs waveform data of voltage and current of the power system; an inference unit 232 that uses the waveform data acquired by the acquisition unit 231 as input and makes inferences as to whether the operation within the power system is normal, based on a learning model 223 that uses past waveform data and operation status data at the date and time indicated by the time axis of the past waveform data as training data; a determination result output unit 233 that outputs result data indicating that an abnormality has occurred in the power system if the inference result is that an abnormality has occurred in the power system; and a related data output unit 234 that outputs predetermined related data related to the power system based on the inference result.

The invention relates to a double-pulse test tool and method for a full-control device series valve, and the tool comprises an upper computer main control unit which is used for transmitting a control instruction, receiving waveform data, and carrying out the automatic parameter calculation; the control unit is connected with the upper computer main control unit, comprises a high-voltage power supply, a support capacitor and a bridge arm change-over switch, and is used for providing adjustable high voltage and realizing rapid reconstruction of a test loop; the test unit is electrically connected with the control unit and the to-be-tested device and comprises a busbar box and a load inductor, and the busbar box is used for interconnecting the supporting capacitor, the load inductor, the bridge arm change-over switch and the to-be-tested device to form an energy transmission main loop; and the acquisition unit is connected with the upper computer main control unit and the test unit, comprises an oscilloscope, a voltage probe and a current probe, and is used for capturing the electrical parameter waveform of the device to be tested in real time and uploading the electrical parameter waveform to the upper computer main control unit.

The utility model provides an automatic testing system. And if the upper computer receives the first confirmation signal and the second confirmation signal, a first instruction is sent to the oscilloscope according to the automatic test script, so that the oscilloscope enters a capture mode to monitor the to-be-tested product. The upper computer judges whether the first feedback signal is received or not, and if the first feedback signal is received, a second instruction is sent to the programmable alternating-current voltage source, so that the programmable alternating-current voltage source provides an alternating-current voltage signal for the to-be-tested product, and the to-be-tested product completes the current test. And then, the upper computer judges whether a second feedback signal is received or not, if the second feedback signal is received, whether a third feedback signal sent by the programmable alternating current voltage source is received within a preset duration or not is judged, and if the third feedback signal is received within the preset duration, test data corresponding to the current test is acquired from the oscilloscope. Therefore, the current test is automatically executed on the to-be-tested product, and the method has high flexibility and universality.

The invention relates to the technical field of waveform display, in particular to an eye pattern generation method and system based on a high-resolution oscilloscope, and the method comprises the following steps: analyzing a channel impact response, extracting effective delay, defining an operation kernel range, constructing sparse inverse filtering compensation distortion, judging an edge generation eye pattern track, and quantifying noise as a weight to carry out sub-pixel diffusion. According to the method, a delay set is established, a non-linear participation range is made to fit real channel behaviors, a high-order cross product is constructed in an original waveform, detail compensation of amplitude and time is enhanced in a sparse inverse filtering mode, and zero point and amplitude characteristics of a second derivative are combined, so that the error rate contour is deduced. A real edge interval is separated, continuous diffusion is formed in a histogram through a discrete probability weight constructed by quantizing noise, so that a statistical form of a low-probability region is completely reserved, and an error code related boundary presents a regular distribution structure in combination with a tail probability gradient.

The present invention relates to an optical modulation system based on the interaction of two collinear light beams having different wavelengths passing through a cuvette containing a solution of Cs2SnI6, comprising a pumping laser emitter emitting a modulated pumping beam with a wavelength between 355 nm and 1550 nm and with a variable frequency; a test laser emitter emitting a continuous wave test beam at 633 nm and with a power limited to 10 mW; a beam splitter where the pumping and test beams are combined to strike on the cuvette; a pass filter that removes the signal from the pumping beam; a spatial analysis camera; a time / frequency analysis equipment with a photodetector, a commercial lock-in amplifier and an oscilloscope; and a signal generator.

The application discloses a digital oscilloscope variable sampling rate acquisition and storage device, which comprises a data acquisition module, an upper computer, a data preprocessing module and a data cache module. The data acquisition module acquires data and sends the data to the data preprocessing module. The upper computer sets a threshold start position, a threshold end position and a sampling rate increase multiple according to user needs, and sets parameters for the data preprocessing module and the data cache module. According to control signals of the upper computer and the data cache module, the data preprocessing module changes the data extraction multiple, thereby changing the data sampling rate, and sends the data after the extraction to the data cache module. The data cache module caches the data, and sends control signals to the data preprocessing module according to the data cache condition. The application can adopt the variable sampling rate in the same waveform data, so that the user can observe the waveform details without wasting the storage space.

The application discloses a kind of cable defect nondestructive testing system and method based on electromagnetic induction, method includes the following steps: S1, closing switch, make detection circuit become passage;S2, by transmission device makes that probe moves along cable line, in the process of moving, by oscilloscope obtains detection signal;S3, using Superlets signal processing method to detection signal is handled, obtains the time-frequency diagram of detection signal when probe at different positions.This application provides a kind of cable defect nondestructive testing system and method based on electromagnetic induction, it is non-injury to the object to be measured, will not cause secondary injury, is expected to be used in the nondestructive testing of cable.

The utility model discloses a system for measuring the half-wave voltage of a phase modulator. The system comprises a laser generation module, an optical coupler, a first phase modulator, a second phase modulator, a first Faraday mirror, a second Faraday mirror, a signal generator, a photoelectric detector and an oscilloscope. The utility model discloses a system for measuring the half-wave voltage of a phase modulator, which is characterized in that a high-frequency periodic square wave electric signal is loaded to a second phase modulator through a signal generator, and the phase drift amount caused by unstable factors such as a light source, an optical device and an external environment can be regarded as perturbation in a small time period; the half-wave voltage of the second phase modulator is obtained by accurately calculating the variable quantity of the number of the peak (valley) values of the sine (cosine) waveform, so that the judgment on the light intensity extreme point of an interference pattern is avoided, the measurement precision is improved, and the key core application in the fields of quantum communication and quantum calculation is realized.

The application discloses a trace element detection system and method, and belongs to the technical field of spectral quantitative detection. The system comprises a laser, a sample stage and a spectral signal acquisition system. The laser ablates a sample to generate plasma after passing through a half-wave plate, a Glan prism, a dichroic mirror and a lens group. The acquisition system comprises a wide / narrow band spectral signal collection system and a trigger system: the wide band system comprises an axial and first lateral light path, couples full spectrum signals to a spectrometer, and is used for matrix identification; the narrow band system comprises a second lateral collection lens, a light splitting element and a UV / visible double channel, each channel is sequentially provided with a neutral density filter, an ultra-narrow band filter and a plano-convex lens, and is connected to a photomultiplier tube to an oscilloscope, and high-sensitivity detection of specific element characteristic spectral lines is realized; and the trigger system is used for triggering the spectrometer to acquire. The wide band and narrow band collaborative architecture is adopted, and both material matrix identification and high-precision quantitative detection of trace elements are considered.

The application discloses a single-end distributed optical fiber vibration sensor system and a signal processing method, and relates to the technical field of optical fiber vibration sensors. The system comprises a laser source, an electro-optical modulator, a to-be-measured optical fiber, a piezoelectric ceramic, a 1*2 coupler, a frequency mixer, an oscilloscope and a PC end. The laser source transmits laser to the to-be-measured optical fiber after the laser is loaded with a carrier frequency by the electro-optical modulator. The to-be-measured optical fiber changes the phase of the light conducted in the optical fiber after being affected by external environmental vibration. The piezoelectric ceramic generates a vibration signal to modulate the phase information of the to-be-measured optical fiber, and then transmits the vibration signal to the 1*2 coupler. The 1*2 coupler divides the vibration signal into signal light and local oscillator light, and then transmits the signal light and the local oscillator light to the frequency mixer for coherent mixing. The frequency mixer demodulates the phase change. The PC end demodulates and processes the phase change collected by the oscilloscope to obtain vibration information of the external environment. The single-end distributed optical fiber vibration sensor system has a large dynamic range, a long measurement distance, low cost and measurement stability.

An experimental device for improving electromagnetic energy conversion efficiency based on LCR circuit, comprising: a signal generator, a transmitting end module, a receiving end module, a signal acquisition circuit and a digital oscilloscope; the transmitting end module comprises a primary side part of LCC-S type compensation circuit and a square ring planar disc type transmitting coil; the receiving end module comprises a square ring planar disc type receiving coil, a secondary side part of LCC-S type compensation circuit and a rectification filtering circuit; the output end of the signal generator is connected with the LCC-S type compensation circuit; the signal acquisition circuit is connected to the output end of the rectification filtering circuit; the probe of the digital oscilloscope is connected to both ends of the transmitting coil; the power supply is turned on, and the signal generator is set to output an alternating current signal with a specific frequency and voltage; the signal is driven to generate a magnetic field after being conditioned by the LCC-S compensation circuit; the receiving coil induces a voltage, and outputs a direct current after rectification filtering; the input voltage value is read by the digital oscilloscope, and the output voltage value is read by the signal acquisition circuit; the structure is simple, and the energy conversion efficiency effect is remarkable.

The invention relates to the technical field of optical polarization state measurement, in particular to a laser polarization state real-time measurement analyzer which comprises collimators, a non-polarization beam splitter, a 1 / 4 wave plate, a compensation module and a polaroid. The first non-polarization beam splitter divides two light beams into a second non-polarization beam splitter, a 1 / 2 wave plate and a third non-polarization beam splitter respectively, and the second non-polarization beam splitter divides two light beams into a second collimator and a third collimator respectively through a first polaroid and a second polaroid; the third non-polarization beam splitter divides two paths of light beams into a fourth collimator and a 1 / 4 wave plate through a third polaroid, the fourth polaroid enters a fifth collimator, the second collimator, the third collimator, the fourth collimator and the fifth collimator are connected to an oscilloscope through four photoelectric detectors, and the upper computer collects data of the oscilloscope and calculates the real-time polarization state of the laser. The method is simple, high in precision and low in cost, and realizes real-time measurement of the laser polarization state.

The invention discloses a delay value determination method and system, a compensation method and system, an oscilloscope and a storage medium. The method comprises the steps that a control module obtains a first delay value corresponding to each to-be-calibrated channel; the control module obtains a second delay value between analog signals input by each analog channel at different gears to be calibrated and analog signals input relative to the analog channel at the reference gear; the control module determines a third delay value corresponding to each analog channel at each to-be-calibrated gear according to the second delay value and the first delay value; the control module obtains a corresponding fourth delay value of the reference channel at each to-be-calibrated gear; and the control module determines a fifth delay value corresponding to the reference channel at different gears to be calibrated according to the fourth delay value and the fifth delay value. According to the technical scheme, manual calculation and determination are not needed, the delay value determination precision is improved, the consumed time is shortened, and the labor cost is reduced.