1119 results about "Square waveform" patented technology

Provided in the present application are a balanced charging method and apparatus for a battery pack, and a computer program product. Charging current control consists of two stages, i.e., a "pulse square-wave excitation" stage and a "multi-stage current-reduction charging" stage. During the pulse square-wave excitation stage, the parameter identification of an equivalent circuit model and the joint estimation of state variables are realized, thereby providing reliable battery parameters for a subsequent balancing process. During the multi-stage current-reduction charging stage, a flyback converter is used to control a balanced current of each battery cell, and the battery cells remain in a charging state throughout a balancing process, thereby effectively mitigating the impact of a hysteresis voltage.

The invention relates to a color electronic paper energy-saving driving design method and system based on optimized square wave driving, and belongs to the technical field of electronic paper display. The method comprises the following steps: firstly, based on a displacement time relation model of charged particles in the color electronic paper microcapsule, determining an optimal driving voltage interval of the particles, and generating a square wave driving waveform library; secondly, the environment temperature is monitored in real time, and square wave driving waveform parameters are dynamically adjusted; thirdly, analyzing statistical characteristics of the input image, dividing content complexity and distributing driving voltage grades; and finally, identifying an image change area through a frame difference algorithm, and performing local refreshing or global refreshing to realize image display. According to the color electronic paper energy-saving driving design method and system based on optimized square wave driving, an efficient and cooperative temperature compensation mechanism and a dynamic voltage adjusting strategy are combined, the display quality is maintained, meanwhile, the driving energy consumption of the color electronic paper is effectively reduced, and it is ensured that the color electronic paper is kept effective and stable in various temperature environments.

The invention discloses a new energy automobile wireless power supply soft switching control system based on a segmentation strategy, and particularly relates to the technical field of new energy automobile wireless power supply, and the control system comprises a resonance current zero-cross detection module which detects a resonance current output square wave signal of a resonance network in real time; the segmented control decision module is used for selecting a strong control strategy or a weak control strategy according to a comparison result of the smoothed frequency difference value and a preset threshold value; the segmented control execution module is used for adjusting the inverter driving frequency by adopting a corresponding control algorithm according to the output of the segmented control decision module; according to the new energy automobile wireless power supply soft switching control system based on the segmentation strategy, the segmentation control logic and the model and algorithm of the special module are designed, so that the driving frequency of the new energy automobile is adjusted, and the driving frequency of the new energy automobile is adjusted to be within the preset frequency locking range. And wide-range frequency locking, rapid dynamic correction and high-precision steady-state control are realized.

The embodiment of the invention provides an excitation signal generation method and system and a digital eddy current sensor, and the method comprises the steps: outputting a square wave signal through a pulse width modulation assembly of a microcontroller unit, and enabling the frequency and resolution of the square wave signal to be adaptive to eddy current probes with different inductance values; inputting the square wave signal into a low-pass filter for filtering, and setting the cut-off frequency of the low-pass filter, the suppression times of higher harmonics and the attenuation slope so as to output a sine wave signal with a target total harmonic distortion range; the amplitude of the sine wave signal is collected in real time, and the pulse width modulation duty ratio and the passband gain of a low-pass filter are dynamically adjusted in combination with a digital control algorithm, so that the sine wave signal is subjected to self-adaptive adjustment and correction and is output; and taking the sine wave signal as an excitation source of an eddy current probe, and driving the eddy current probe to carry out nondestructive testing. According to the invention, the excitation signal which gives consideration to high-frequency signal generation, deep harmonic suppression and digital adaptive adjustment can be generated.

The invention discloses an eddy current displacement sensor sine constant current source excitation method, and belongs to the technical field of sensor measurement and control. The method comprises the following steps: S1, generating positive and negative symmetric reference voltages through a reference voltage source circuit; s2, outputting a square wave control signal with adjustable frequency by the control chip, and driving a switching circuit to generate a square wave taking the positive and negative reference voltage as a level; s3, processing the square wave through a filter circuit to obtain a standard sine wave voltage signal; and S4, converting the sine voltage signal into sine constant current source excitation through a Howland current source circuit, and outputting the sine constant current source excitation to a sensor probe coil. According to the invention, through combination of digital control and analog conversion, the circuit structure is simplified, the cost is significantly reduced, and convenient adjustment of the output frequency and high stability and precision of the output current are realized at the same time.

The invention discloses a low-power-consumption winch sensor based on a tunneling magnetoresistance effect. The low-power-consumption winch sensor comprises a measurement module, a signal conversion unit, a shell, a mandrel, a magnetic rotary disc and a detection assembly. The magnetic turntable and the mandrel are connected and rotate synchronously, the detection assembly comprises a TMR sensing element and N magnets, and the magnetic turntable is provided with mounting blind holes for embedding the magnets; the TMR sensing element is arranged on the shell and comprises a mounting plate and two sensing units, the magnetic domain directions of the two sensing units are perpendicular to the rotation axis, magnetic resistance signals of the two sensing units are converted through the signal conversion unit and input into the measuring module, the horizontal distance between the centers of the two sensing units and the magnet and the rotation axis is R, and the center distance L of the two sensing units is smaller than R * sin (180 degrees / N); the sensor is based on the TMR tunneling magnetoresistance effect, is high in detection sensitivity and low in energy consumption, outputs square wave signals with phase differences, can be used for a measurement module to accurately analyze and calculate the rotating speed and the rotating direction of a winch roller, is simple in overall structure, small in radial size and easy to install, and the installation precision is controlled.

The invention discloses an active pen and touch screen interaction system resistant to common-mode interference and a signal demodulation method. The system comprises a signal receiving terminal and a signal transmitting terminal. The signal transmitting terminal modulates data to be transmitted by adopting a differential binary phase shift keying modulation method, and transmits a generated modulation signal to the signal receiving terminal; the analog front-end receiving module is coupled with the signal transmitting terminal, receives the modulation signal and outputs a digital square wave signal after fidelity extraction processing; and the digital demodulation processing module performs differential coherent digital demodulation on the digital square wave signal based on the prior characteristics of the modulation signal, inhibits residual noise and recovers data to be sent. The analog front end focuses strong common-mode noise suppression and analog filtering, the digital demodulation algorithm performs secondary digital purification by using signal time sequence characteristics, and the two constructs an efficient anti-interference pipeline. Meanwhile, the regular square wave signals can be directly processed through differential coherent demodulation, and the requirements for performance and power consumption of a rear-end processor are lowered.

The invention discloses an active clamping resonant drive circuit and device. The active clamping resonant drive circuit comprises a power supply module, an energy storage clamping module, a switch group module, an additional capacitor module and an output drive module. The device corresponds to the circuit. According to the application, through the energy storage clamping module and the combination of the switch group module, wide-range duty ratio adjustment of quasi-square wave driving output can be realized under the frequency of tens of megahertz, duty ratio requirements of different working conditions can be adapted, frequency band work with a certain width can be supported through the same set of circuit parameters, and the design flexibility of the ultrahigh frequency power converter is greatly improved; the circuit redesign cost in different frequency scenes is reduced; through the energy storage clamping module, the coupling degree of a driving waveform and line parasitic parameters is effectively reduced, so that the driving circuit still has good stability during high-frequency work, the anti-interference capability is enhanced, the adverse effect of the parasitic parameters or external interference on the driving performance is avoided, and the reliability of high-frequency work of the power electronic switching device is guaranteed.

The invention discloses a voltage-to-current circuit, a calibration method, a multi-range calibration method and a power supply, a power amplification unit adopts MOS tubes of different channel types to match with working voltages of opposite polarities, and a bias circuit is combined to superpose exclusive bias, so that the waveform adaptation limitation of a traditional circuit is broken through, and the voltage-to-current conversion efficiency is improved. Alternating current, direct current, triangular waves, square waves and other special waveforms can be stably output, and the adaptability is greatly improved; secondly, pure hardware signal transmission and feedback are carried out in the whole process, the intermediate link of MCU measurement-setting is omitted, multi-stage error accumulation is effectively reduced, output delay is remarkably reduced, and the response speed is higher; in addition, the current sampling feedback unit and the error amplification unit form closed-loop control, power amplification output current is sampled in real time and fed back for calibration, and the precision and stability of the output current are effectively improved. Meanwhile, the bias circuit accurately regulates and controls the conduction state of the MOS tube, the linearity and consistency of current output are improved, and the overall structure is simple and reliable.

The invention discloses a method for dynamically setting dog feeding time of a watchdog circuit, which comprises the following steps of: collecting and monitoring power consumption of a CPU (Central Processing Unit) and a corresponding load, and fitting the load and power of the CPU according to monitoring data so as to reflect the running state condition of a system; power consumption of a monitoring CPU is collected in real time, the real-time CPU load is calculated according to the fitting relation between the CPU load and power, and the watchdog feeding time of a watchdog circuit is determined according to the CPU load; a square wave period is set, square waves are collected to set timeout time, and the timeout time is kept consistent with dog feeding time, determined according to CPU loads, of a watchdog circuit. According to the method, the CPU power consumption and the load are fitted, the CPU load is monitored in real time, the square wave period is adjusted, the dog feeding time is dynamically adjusted according to the CPU load, resource waste is avoided, and the method is suitable for the fields of embedded systems, industrial control and the like.

The invention discloses an electromagnetic noise suppression control method for a multi-phase self-excitation synchronous motor. A driving system of the synchronous motor comprises a double-closed-loop control system and an inverter. The specific method comprises the steps that the double-closed-loop control system outputs voltage reference signals of all coordinate axes, and all the coordinate axes are arranged in an electromechanical energy conversion plane and a non-electromechanical energy conversion plane respectively; injecting the square wave signal into a selected coordinate axis, and cooperatively adjusting excitation and noise values by using the positive correlation between excitation current and the amplitude of the square wave and the negative correlation between the excitation current and the frequency of the square wave; and then outputting the adjusted voltage reference signal, processing the adjusted voltage reference signal and other voltage reference signals, and outputting the processed voltage reference signal and other voltage reference signals to an inverter to generate a driving voltage. Therefore, the square wave amplitude is synchronously increased and the excitation current is kept stable when the noise reduction of the square wave frequency is improved by utilizing the quantitative relation that the excitation current is positively correlated with the square wave amplitude and negatively correlated with the square wave frequency, so that the load capacity of the synchronous motor is prevented from being reduced.

The application discloses a display panel driving method, a driving device and a readable storage medium, and relates to the technical field of display, which is characterized in that: an initial response square wave signal is converted based on a current display temperature to obtain a target response square wave signal; a target duty cycle in the target response square wave signal is used to determine a calling requirement, so as to determine a response duration corresponding to a normal output display picture of a liquid crystal display device at the current display temperature; a target response duration parameter table meeting the calling requirement is called; and the display panel at the current display temperature is driven according to the target response duration parameter table, so that the reaction speed of various pixel points to an input display signal at various temperatures is effectively accelerated, and the adverse situation that an animation picture is still blurred and ghosted due to the fact that different temperatures cannot be considered is avoided.

The invention relates to the technical field of power grid measurement, in particular to a miniaturized wireless self-powered alternating current electric field measurement method and system. Comprising the following steps: acquiring radio frequency energy in an electric field environment, and converting the radio frequency energy into direct current electric energy through a radio frequency energy acquisition system consisting of a microstrip antenna, a voltage doubling rectifying circuit and an energy management circuit; an alternating current electric field signal is collected through a differential dual-electrode sensor structure, and an electric field voltage signal is generated; amplifying the voltage signal through an instrument amplifier, and obtaining a digital signal of the electric field signal through an analog-to-digital conversion circuit; and processing and analyzing the alternating current electric field information according to the digital signal. By combining a radio frequency energy acquisition technology with a differential dual-electrode sensing structure, the electric field sensor has the performance characteristics of self energy supply, miniaturization, high precision, wide frequency response and low power consumption. The system can measure various types of electric field signals, including sine wave, triangular wave and square wave electric field signals, has a wide frequency range and a wide measuring range, and is excellent in linearity.

The invention provides a stress detection system and method based on active and passive dual modes, and relates to the technical field of stress detection, and the system comprises a stress sensor and a data processing module which are in communication connection. The stress sensor comprises a first coil assembly, a second coil assembly and a three-axis magneto-dependent sensor. The first coil assembly is configured to apply a square wave current to the first coil assembly through the excitation source to generate an ACSM effect; the data processing module is configured to collect a voltage signal and a phase signal of the second coil assembly under the ACSM effect; collecting a magnetic field signal of the three-axis magneto-dependent sensor; performing feature extraction on the voltage signal, the phase signal and the magnetic field signal to obtain feature data; and inputting the characteristic data into the joint characteristic decoupling mathematical model, and determining the pipeline stress value of the to-be-detected pipeline, so as to solve the problems that an existing stress sensor is large in error during detection in a low-stress area, and the accuracy of a detection result is low due to interference of an environmental magnetic field.

The invention belongs to the technical field of data processing, and particularly discloses a displacement data acquisition control method and device, electronic equipment, a medium and a program product.The method comprises the steps that multi-channel displacement data acquisition is started based on a detection task, an FPGA module is triggered to record a reference position through sensing head original point positioning, and the reference position is obtained; the collected binomial square wave signals are conditioned to obtain waveform data; analyzing the waveform data in real time, identifying first preset waveform types such as a unilateral waveform, a special symmetric waveform and a sawtooth waveform and other second preset waveform types, and triggering a corresponding execution plan according to an identification result; and aiming at a second preset waveform type, adopting a preset synthesis algorithm to calculate the multichannel data, and generating characteristic parameters such as depth, thickness, roundness and taper of the detected object. According to the method, high-precision and high-robustness displacement data real-time acquisition and processing can be realized, and the reliability and the automation level of a detection result are improved.

The invention discloses a root mean square value RMS detection method and system, and belongs to the technical field of measurement and control. Wherein a to-be-detected voltage signal is preprocessed by the filter amplification circuit, a square wave signal synchronous with a sine wave zero crossing point is generated through the zero crossing comparison circuit, a signal period boundary is identified, and an integral number of complete and continuous signal periods are extracted in real time through the period detection module; the cycle information identified by the cycle detection module is transmitted to the data storage and processing module, meanwhile, the sampling signal of the high-speed ADC module is transmitted to the data storage and processing module, and sine wave data sampled by the high-speed ADC module is subjected to point-by-point square operation; the square values in a complete period are accumulated and summed, and an original sampling sequence is not stored; fIR digital filtering is carried out on the RMS values of continuous C periods through a digital filtering module; and the dynamic response performance of the system under different frequency bands is remarkably enhanced while the measurement precision is improved.

The invention discloses a chip test circuit and system. The circuit comprises a high voltage generation module, a negative voltage generation module, a gate drive module, a switch module, a control module and a comparison module. The high-voltage generation module and the negative-voltage generation module respectively generate a high-voltage signal and a negative-voltage signal; the control module outputs complementary control signals to the gate driving module, and the gate driving module drives the switch module to alternately switch between a high-voltage signal and a negative-voltage signal to generate a square signal and input the square signal to a sampling input end of the chip to be tested; the comparison module compares a signal of the sampling input end with a reference voltage and outputs a corresponding level signal to the control module, so that the control module judges the conduction state of a grid electrode in the chip to be detected. According to the invention, the synchronous rectification control chip of the sealed MOS can be tested, the problem that the control state of the internal grid cannot be tested when the internal grid is not led out is solved, and the test coverage of the control logic of the internal grid of the chip is realized.

The invention provides a compensation method for asymmetric errors of a double-path weak measurement system and the double-path weak measurement system, which can be applied to the technical field of quantum measurement. The compensation method comprises the following steps: under the condition that wide-spectrum light passes through a double-path weak measurement system and the size of a signal which is weakly coupled with a weak coupling module is within a preset range, applying a square wave signal with a preset amplitude to a push-pull phase modulator, and performing binary detection by using an acquisition module to obtain four first detection signals; under the condition that the preset amplitude is not 0, determining a first error introduced by asymmetric loss of the double-path weak measurement system according to the corresponding four first detection signals; according to the four first detection signals corresponding to the square wave signal with the preset amplitude of 0 and the first error, determining a second error introduced by filter asymmetry of the double-path weak measurement system; according to the first error and the second error, asymmetric error compensation is carried out on the response formula, and it is ensured that the double-path weak measurement system has high sensitivity and stability.

The invention relates to the technical field of magnetic shielding, and provides a demagnetization method and device for a magnetic shielding device, electronic equipment and a readable storage medium, and the method comprises the steps: collecting a feedback circuit signal of a target magnetic shielding device through a voltage and current collection unit; analyzing the feedback circuit signal by using a signal acquisition processor, determining the current degaussing demand of the target magnetic shielding device, and calculating a degaussing pulse parameter matched with the current degaussing demand; a pulse generating unit is used for generating a target pulse with the adjustable pulse width according to the degaussing pulse parameters, the target pulse is a bipolar square wave pulse, and the adjusting interval of the pulse width comprises the millisecond level and the nanosecond level; and utilizing a pulse switching unit to act the target pulse on the target magnetic shielding device, so that the target magnetic shielding device is subjected to magnetic saturation or magnetic fading. According to the technical scheme provided by one or more embodiments of the invention, the average power demand of the degaussing power supply can be reduced, and the degaussing effect can be improved.

An interface circuit includes a first coupler and a first low-pass filter. The first coupler is configured to superimpose a first communication signal on a first power line transmitting a first power supply voltage of a square wave, or extract a first communication signal from a first power line transmitting a first power supply voltage of a square wave on which the first communication signal is superimposed. The first low-pass filter is inserted into the first power line and is connected to the first coupler. The first low-pass filter includes a first inductor at each of both ends of the first low-pass filter.

The invention discloses a battery deformation monitoring method and device, a storage medium and computer equipment, and the method comprises the steps: enabling a flexible capacitive sensor to be attached to the surface of a target monitoring battery, and sensing the capacitance change caused by the deformation of the battery; the capacitance change is converted into a frequency signal through an LC oscillation circuit; a high-speed comparator is adopted to convert the frequency signal into a square wave; and the microcontroller captures the frequency of the square wave and inversely calculates the capacitance value, the capacitance change rate is calculated by combining a sliding window algorithm, median filtering and a temperature compensation technology, and if the capacitance change rate exceeds a preset threshold value, the battery deforms, so that the high-accuracy and high-reliability real-time monitoring and early warning effects on the battery deformation phenomenon are achieved.

The invention relates to a passive wireless temperature sensor circuit, which comprises a transceiving antenna, an RF-DC rectifier circuit, a temperature sensing circuit and a backscatter circuit, the RF-DC rectifier circuit receives external radio frequency energy based on the transmit-receive antenna and then outputs direct current for power supply. The temperature sensing circuit comprises a complementary absolute temperature voltage generator and a ring oscillator; the complementary absolute temperature voltage generator comprises an MOS tube and generates CTAT voltage based on temperature characteristics of the MOS tube. The ring oscillator converts the CTAT voltage into an oscillation frequency signal of the ring oscillator and then outputs a square wave frequency signal with a negative temperature coefficient; the backscattering circuit backscatters the square wave frequency signal through the transceiving antenna; the CTAT key generation circuit built by the MOS tube generates CTAT voltage, a temperature frequency conversion chain is built through the CTAT voltage and the ring oscillator, temperature information is converted into frequency information of the oscillator, the power consumption of the temperature sensing circuit can be effectively reduced, and meanwhile the voltage coefficient of the CTAT voltage is increased by combining the temperature characteristic of the MOS tube.

The invention relates to a square wave generation method and system based on a DDS signal transmitter, and belongs to the technical field of digital electronic signal synthesis. The method comprises the following steps: calculating a digital analog signal sampling frequency based on a square wave output frequency set by a user, and obtaining a digital fundamental frequency phase signal according to a phase-locked loop precision range; mapping the digital fundamental frequency phase signal into a sinusoidal amplitude signal according to a digital phase accumulation mechanism to obtain a digital-analog conversion clock, binarizing the sinusoidal amplitude signal, and outputting a square wave output period; dividing a square wave output period into a low level region and a high level region according to the precision range of the phase-locked loop, reading a square wave output frequency set by a user through a random storage address, and outputting a non-offset phase-locked square wave; and constructing an error accumulation self-checking architecture to calculate a frequency control word, and when detecting that the frequency control word has a decimal discarding error, recalculating the frequency control word.

The invention discloses an EVDWPT ground control box group power synchronization method based on optical fiber synchronous frequency modulation. The method comprises the steps that a vehicle-mounted end sends a square wave signal containing a power level to a power supply cabinet through a signal transmitter; the power supply cabinet analyzes the power level in the square wave signal, generates a cooperative control signal containing a synchronous pulse frequency fine tuning instruction and a phase shift angle adjusting instruction, obtains the current guide rail position of the vehicle emitting the square wave signal, and sends the cooperative control signal to the inverter box corresponding to the guide rail position; the inverter box adjusts the working frequency to the target frequency according to the synchronous pulse frequency fine tuning instruction, and adjusts the phase difference between the output voltage fundamental wave and the current according to the phase shift angle adjusting instruction; and the inverter box drives the corresponding transmitting coil according to the adjusted target frequency and the phase shift angle so as to output power matched with the power level to the vehicle-mounted end receiving coil, so that the vehicle power matching requirement is met. According to the invention, while compatible charging of the multi-power-level vehicle is realized, soft switching starting of the inverter can be ensured.

The invention provides a self-excited cesium optical pump atomic magnetometer and a magnetic field measurement method. The magnetometer comprises a physical probe part and a circuit part. The physical probe part comprises a cesium spectrum lamp, an optical element, a cesium atom absorption gas chamber, a radio frequency coil and a photoelectric detector; the circuit part comprises a photoelectric conversion circuit, a phase-locked amplification circuit and a radio frequency excitation circuit modulated by square waves. A macroscopic magnetic moment is generated by pumping cesium atoms through left-handed circularly polarized light, a radio frequency magnetic field induces Larmor precession, light intensity changes are detected and fed back to a radio frequency coil to form self-oscillation, and the external magnetic field intensity is calculated according to the linear relation between oscillation frequency and the magnetic field. Square wave modulation is adopted to broaden the measurement bandwidth, a magnetic field direction adjusting system is additionally arranged to automatically keep an angle of 45 degrees between an optical axis and a magnetic field so as to eliminate a blind area, the hemisphere automatic switching function is achieved, and the advantages of being high in sensitivity, fast in response, high in adaptability, small in size and low in power consumption are achieved.

According to an embodiment, a circuit is proposed for generating rate and quadrature demodulation signals, incorporating unidirectional hysteresis for negative edges. The circuit features a preliminary stage that amplifies the differential sinusoidal signal from gyroscopic proof mass oscillations; a gain stage for boosting this signal with adjustable hysteresis levels; an output stage delivering a full-swing square wave output; and a customizable offset component to deepen the drop in the non-inverting compared to the inverting signal for the third signal's falling edge.

The invention discloses a coupling pulse distortion compensation method for superconducting quantum computing, and relates to the field of signal processing, and the method comprises the steps: S1, inputting an initial square wave signal into a first IIR filter, and reducing the frequency attenuation of superconducting quantum bits; s2, outputting the initial square wave signal to a second IIR filter to improve the high-frequency component of the initial square wave signal; s3, outputting the initial square wave signal to a third IIR filter to eliminate pulse back edge reflection of the initial square wave signal; and S4, outputting the initial square wave signal to a first FIR filter to carry out ripple correction so as to complete pre-distortion correction. By setting the staged pre-distortion compensation of the three-section IIR filter and the one-section FIR filter, the pre-distortion compensation of the square wave signal is more accurate and stable, the square wave edge response is rapid and the amplitude is correct, and the time delay and the amplitude error caused by the link are reduced; the quantum bit Z-axis phase control method has the advantages that quantum bit Z-axis phase control is more accurate, and the fidelity of a square wave signal gate is prevented from being reduced.

The invention discloses a hit map heart rate detection method, device and system and a storage medium. The method comprises the steps that a BCG signal and an ECG signal are obtained; preprocessing the BCG signal and the ECG signal; a binary square wave heart rate prediction network is constructed and pre-trained according to the ECG R peak position binary square wave sequence generated in the ECG preprocessing stage; and constructing a BCG heart rate prediction network according to the pre-trained binary square wave heart rate prediction network. By means of the technical scheme, the problems that in the prior art, the number of intrinsic mode functions between samples is not consistent, and the positions of intrinsic mode function components synchronized with the electrocardio rhythm are not fixed are solved.

The present application relates to the technical field of autonomous driving. Disclosed are a clock synchronization system and method. In the system, a global synchronization module achieves clock synchronization of a global computing device on the basis of a clock signal of a navigation device, and sends to a local synchronization module a square wave signal including a timestamp. The local synchronization module completes, on the basis of the timestamp included in the square wave signal, the resetting for a system clock of the local synchronization module. The local synchronization module includes a plurality of local computing devices, wherein when capturing a rising-edge pulse signal, a first local computing device sends a trigger signal to a trigger-type sensor according to a set pulse width and starts timing, such that the trigger-type sensor transmits collected data to the first local computing device, and when a timing duration reaches a set threshold, the first local computing device stops sending the trigger signal; and a second local computing device uses a system clock thereof as a clock source of a non-trigger-type sensor connected thereto. The present application achieves high-precision clock synchronization without requiring gateway support.

The invention provides a device and a method for monitoring and diagnosing the rotating speed state of an aero-engine. The device comprises an input protection and preprocessing unit, a signal isolation and conditioning unit and a data processing unit which are connected in sequence, the input protection and preprocessing unit receives a rotating speed signal output by a sensor, preprocesses the rotating speed signal and divides the signal into two paths; the signal isolation and conditioning unit adopts a square wave processing channel to shape the preprocessed first path of rotating speed signals into square waves, adopts an analog signal processing channel to convert the other path of rotating speed signals into digital signals, and then outputs the digital signals in an isolated manner; and the data processing unit calculates the rotating speed according to the square wave signal, performs amplitude analysis according to the digital signal, and diagnoses the state of the rotating speed sensor according to a preset truth table by synthesizing the rotating speed and the amplitude. Based on the device, the invention further provides an aero-engine rotating speed state monitoring and diagnosing method. According to the invention, on the basis of diagnosis logic of dual-channel cross validation, sensor disconnection, signal attenuation and channel hardware faults are effectively distinguished.