207 results about "Excitation pulse" patented technology

The invention relates to a control method of a digital ultrasonic flaw detector calibrating device. The control method comprises the following steps: acquiring shape data and material parameters of a to-be-detected material, calling a matched standard test block, calculating adaptive ultrasonic frequency and flaw detector parameters, creating and solving a multi-objective optimization model, and planning a detection path of the to-be-detected material based on an optimal solution; emitting ultrasonic waves with matched frequency to implant the quantum dot mark array to carry out fluorescence-ultrasonic dual-mode signal correlation calibration; scanning according to a planned detection path, establishing a time-varying channel model to predict a current time delay variation, extracting a fundamental frequency and a harmonic component of a probe excitation pulse by adopting an autocorrelation algorithm to serve as a reference, constructing a state vector of a filter based on the predicted current time delay variation, and performing phase correction on a received signal to obtain a phase correction signal; and analyzing the defect of the to-be-detected material based on the corrected receiving signal. By integrating material parameter dynamic modeling, multi-modal signal collaborative calibration and adaptive path optimization, the detection precision and efficiency under complex working conditions are improved.

The invention discloses a detection method of a high-speed connector and a related device, and the method comprises the steps: carrying out the plugging motion control of the high-speed connector, injecting a pulse sequence carrying a displacement mark into a differential signal pair in the process, and obtaining the initial reflection data containing a plugging displacement-time index; space-time boundary information of a gap coupling section, an initial touch deformation section and a full-insertion steady-state section is analyzed and determined in a segmented mode through reflection characteristics. And generating a mutual excitation pulse pair in the initial touch deformation section, and executing differential sampling processing by using a thermal-electric coupling effect to obtain a thermally induced group delay sequence and a geometrically induced impedance differential sequence. A dynamic zero-reflection anchor point is generated based on double-sequence fusion, and real-time reference plane migration processing is realized to obtain a calibration impedance curve. And repeating the processes of insertion and extraction, generating an elastic difference curve through displacement-time coaxial difference processing of a bidirectional calibration impedance curve, and positioning an irreversible abnormal section of the impedance. According to the method, the plugging transient impedance change can be continuously monitored, and the early failure risk of the high-speed connector can be evaluated in time.

The invention provides a polarization modulation coupling time control phase locking high-temperature noise suppression in-situ Raman method and device, and relates to the technical field of spectrum detection. The method comprises the following steps: exciting pulse linear polarization laser to irradiate a sample to obtain Raman scattering light; a parallel vibration component (P) and a vertical vibration component (S) are obtained, and original spectral data containing polarization information and residual high-temperature noise are collected by adopting an ISCCD detector synchronously triggered by gating. Background noise is removed and a parallel vibration component (P) is extracted through polarization differential processing in combination with adaptive filtering (dynamically adjusting parameters according to signal distribution) and principal component analysis (PCA); and finally, performing signal-to-noise ratio optimization on the pure component by applying a phase locking algorithm to finally obtain a Raman spectrum result with a high signal-to-noise ratio. According to the invention, the in-situ Raman spectrum of the material within the temperature range of room temperature to 3000 DEG C can be measured, and the detection of weak signals is more sensitive.

The invention belongs to the technical field of laser pulse modulation, and particularly relates to an ultrafast laser multi-pulse sequence preparation device and method. According to the invention, ultrafast pulse laser is divided into a transmission light path and a reflection light path through a beam splitter, a spatial light modulator is utilized to perform programming control on a target pulse in the transmission light path, and amplitude and pulse width parameters can be controlled while multiple pulse strings are generated; and the light path of the reflection light path is controlled through the high-precision one-dimensional displacement table, so that the time delay of a reflection light path pulse relative to a transmission light path pulse is controlled. And after the reflected light path and the transmission path subjected to pulse shaping are combined again, a periodic pulse string sequence with controllable time delay, pulse number, pulse width parameter and pulse intensity is realized. The problem that high-precision multi-pulse dynamic programming cannot be achieved through a traditional adjusting mode is solved, and the problems that in the prior art, the number of excitation pulses and pulse width parameters cannot be controlled at the same time, and an ordered periodic pulse sequence cannot be generated are solved.

The invention relates to the technical field of magnetic shielding, and discloses a self-adaptive active adjustment type magnetic shielding device demagnetization circuit and device, and a control acquisition system, which are used for comparing a residual magnetism state with a preset expected value and generating a control instruction; the energy output identification system is used for outputting an alternating current degaussing signal according to the control instruction to perform degaussing, outputting an excitation pulse signal to perform residual magnetism detection, identifying a zero crossing point of the alternating current degaussing signal and realizing mode switching of degaussing and residual magnetism detection; and the magnetic shielding device is used for demagnetizing under the action of the alternating current demagnetizing signal and feeding back the residual magnetism state of the preset feature point under the action of the excitation pulse signal. The demagnetization is interrupted at the preset feature points in the demagnetization process, the real-time residual magnetism state is collected, and the demagnetization parameter at the next moment is adjusted after the real-time residual magnetism state is compared with the preset residual magnetism expected value, so that the problem of low efficiency due to the fact that the demagnetization parameter needs to be reset after the process is finished is solved, and the demagnetization efficiency and accuracy are greatly improved.

The invention discloses a wireless communication network intelligent optimization method and system based on neuron collaboration, and relates to the technical field of wireless communication. The method comprises the following steps: mapping a communication node into a bottom layer sensing neuron and constructing a neural state variable set; constructing a node neural situation function based on the variables; when the local threshold value is exceeded, excitation pulses are generated and uploaded to middle-layer convergence neurons; the middle layer carries out pulse space aggregation and extreme value search, and outputs a selection strategy and an adjustment strategy; and reporting to a top layer to execute whole network neural synchronization index analysis, and optimizing the wireless communication network. The technical problems of low spectrum resource utilization rate and unstable network performance caused by the fact that a traditional wireless communication network cannot realize high-efficiency spectrum allocation and dynamic topology reconstruction under user mobility change are solved, and the purposes of realizing local quick response and global collaborative optimization by constructing a layered neural network and improving the network performance are achieved. And the spectrum resource utilization rate is improved, and the network dynamic adaptive capability is enhanced, so that the user service quality is guaranteed.

Systems, devices, and methods are provided for pulsed strain gauge topologies. A weight sensor assembly may comprise one or more load cells for receiving excitation pulses during a first state period of a duty cycle, sample and hold (S / H) circuitry connected to the one or more load cells that holds analog measurement signals from the one or more load cells, first filtering circuitry connected to the S / H circuitry for processing the analog measurement signals and producing a DC level signal, an amplification system connected to the filtering circuitry, for amplifying the DC level signal, second filtering circuitry connected to the amplification system for filtering power line noise, and analog-to-digital (ADC) circuitry connected to the second filtering circuitry. Examples of load cells described herein include full-bride load cells (FBLCs) and half-bridge load cells (HBLCs).

The invention belongs to the technical field of geophysical methods, and particularly discloses a method and system for extracting transient electromagnetic signals through ground nuclear magnetic resonance. The method comprises the following steps: periodically transmitting nuclear magnetic resonance excitation pulses to an underground medium, and extracting nuclear magnetic resonance turn-off pulses as transient electromagnetic excitation signals at the turn-off stage of each nuclear magnetic resonance excitation pulse; after each nuclear magnetic resonance excitation pulse is turned off, detecting a transient electromagnetic response signal; and when the last nuclear magnetic resonance excitation pulse is turned off, collecting a nuclear magnetic resonance response signal. According to the invention, the high-energy turn-off pulse is directly extracted as the transient electromagnetic excitation signal in the turn-off stage of the nuclear magnetic resonance excitation pulse, so that the overall signal utilization efficiency and excitation capability of the system are remarkably improved.

A method is provided for operating a wireless charger having a multi-switch inverter which supplies an output PWM signal to a resonant circuit in response to switching control signals, including a first set of continuous excitation phase switching control signals (which generate the output PWM signal to have alternating positive and negative pulses having a first pulse frequency) and a second set of free resonance signal sensing phase switching control signals (which enable the resonant tank circuit to generate a resonant decaying output voltage signal in the presence of a foreign object that is located near the wireless charger), where each continuous excitation phase switching control signal includes a plurality of positive or negative excitation pulses having the first pulse frequency, and where one or more quality factor parameters of the wireless charger are measured based on one or more electrical parameters of the resonant decaying output voltage signal.

According to the ultrasonic pulse generator, the echo protection circuit, the imaging system and the control method provided by the invention, the designed high-frequency pulse generator has the capability of adjusting the pulse width and the pulse edge of an excitation pulse, so that the energy frequency band distribution of a high-voltage excitation signal is regulated and controlled to better drive a transducer to generate a stronger-energy ultrasonic signal; and echo signals with higher peak values and wider bandwidth are obtained. The high-frequency pulse generator designed by the invention can realize extremely narrow high-voltage pulse signals and has rapid rising and falling edges, so that effective excitation of an ultrahigh-frequency transducer (greater than 100MHz) is realized. The T / R switch and the control mode designed by the invention can realize lower insertion loss and compression of near-field blind area time, and have practical value for improving the signal-to-noise ratio of high-frequency ultrasonic imaging. A new excitation and protection circuit mode is provided for a high-frequency ultrasonic imaging circuit system, and the high-frequency ultrasonic imaging circuit system has good economic value and practicability.

The invention relates to a metal component defect depth detection system and method based on sweep frequency pulsed eddy current. The system comprises a pulse eddy current probe module, a pulse signal excitation module, a current amplification module, a voltage amplification module, a band-pass filtering module and a signal acquisition module. The pulsed eddy current probe module comprises an excitation probe and a receiving probe which are respectively used for transmitting excitation signal pulsed eddy current and receiving sampling data; the pulse signal excitation module is connected with the upper computer module and the current amplification module, and is used for receiving the control command and exciting pulse signal current to control probe detection; the current amplification module is used for amplifying the pulse current; the voltage amplification module is connected with the receiving probe and the band-pass filtering module and is used for amplifying the induced voltage; the band-pass filtering module is used for frequency screening; and the signal acquisition module is responsible for performing format conversion on the sampling data and uploading the sampling data to an upper computer. The system can realize excitation and signal acquisition for different depth areas, and accurately determine the characteristic frequency of defect depth.

The invention provides an online power supply switch mutual inductor fault detection method and system, a medium and a product, and relates to the technical field of online monitoring and fault diagnosis of power equipment, and the method comprises the steps: generating a synchronous triggering instruction at the zero crossing point moment of the power frequency current of a mutual inductor; in response to the instruction, injecting an excitation pulse into a secondary circuit of the mutual inductor and synchronously acquiring a feedback voltage to obtain a mixed transient signal; extracting a pure response waveform only containing a high-frequency component from the mixed transient signal to carry out multi-resolution time-frequency transformation, and calculating and outputting a multi-dimensional feature vector representing a winding state; inputting the multi-dimensional feature vector into a pre-trained neural network model for classification operation to obtain a fault classification probability of the current transformer state; and comparing the fault classification probability with a preset confidence threshold to generate a fault diagnosis result of the mutual inductor. By implementing the method, the recognition sensitivity of the system on early weak faults and high-frequency distribution parameter changes of the mutual inductor can be improved.

The invention discloses a synchronous self-calibration cable distributed partial discharge detection calibration positioning device and method, and relates to the technical field of power system cable insulation state detection. The device comprises an upper computer and at least two acquisition and detection systems, for any acquisition and detection system, the detection module receives the control signal and outputs a synchronous calibration signal; the pulse calibration unit excites a calibration pulse signal on the cable shielding grounding wire according to the synchronous calibration signal, and takes the obtained excitation pulse signal as a time reference signal; the detection module determines a pulse time difference based on the time reference signal; the upper computer calibrates the adjacent acquisition and detection systems according to the pulse time difference, and performs waveform comparative analysis on acquired data acquired after calibration to obtain an analysis result; the analysis result is used for realizing detection positioning based on waveform time delay. The invention aims to realize synchronous function calibration and partial discharge detection positioning of cable distributed partial discharge detection.

The invention relates to the technical field of geological disaster prevention and control, and discloses an underground rock stratum water-bearing while-drilling nuclear magnetic resonance 3D imaging method which comprises the following steps: arranging a plurality of long lead grounding sources with the length of 500-1000 meters and the interval of 10-20 meters on the ground, and supplying alternating current pulses with the frequency of Ramole frequency to enable hydrogen nuclei in underground water to form macroscopic magnetic moment, after the excitation current pulse is cut off, the same coil is used for picking up nuclear magnetic resonance (NMR) signals generated by excitation of different excitation pulse moments; a receiving coil is installed behind the drill bit and dynamically receives FID signals along with advancing of the drill bit. A long wire grounding source is arranged on the ground to form an excitation magnetic field, and a receiving coil is mounted behind a drill bit to dynamically receive nuclear magnetic resonance signals while drilling, so that high-precision detection of the water-bearing property of an underground rock stratum from two dimensions of the earth surface and the underground is realized. The change of the aquifer and the potential water inrush hidden danger can be monitored in real time, and the detection precision and the resolution ratio are effectively improved.

The invention discloses a random analog pulse signal generation circuit, which is characterized in that the output of an excitation pulse generation module obeying discrete random time distribution is connected to an excitation pulse generation module obeying continuous random time distribution, and the excitation pulse generation module is used for generating square wave pulses of which the time interval of the front edges of two adjacent excitation square waves obeying discrete distribution; the output of the excitation pulse generation module obeying continuous random time distribution is connected to the analog narrow pulse generation module, and the analog narrow pulse generation module is used for converting the generated square-wave pulse into a square-wave excitation pulse of which the leading edge obeys specific distribution; and the analog narrow pulse generation module is used for converting the leading edge of the square wave excitation pulse into a narrow pulse signal so as to generate a signal waveform suitable for a fast detector electronics system test. According to the circuit, the inherent discreteness of digital logic is eliminated while better programmability of the digital logic is kept, so that the finally output pulse waveform signal is closer to the time characteristic of the signal processed by the detector under the real working condition.

The application discloses a portable fluorescence lifetime detection device based on a SiPM array and an on-chip TDC, and relates to the technical field of fluorescence lifetime detection devices, and comprises the following modules: an excitation light source module, which is used for sending a synchronous electric pulse signal to a time measurement module while triggering a sub-nanosecond excitation pulse, the signal being a starting timing signal for time measurement of the time measurement module, and the excitation pulse being used for exciting a sample to be measured to generate a fluorescence signal; a detection module, which is used for collecting the fluorescence signal and obtaining a photon detection signal, and outputting each photon detection signal to the time measurement module; the time measurement module, which is used for measuring a time interval from the synchronous electric pulse signal to each photon detection signal to generate a timestamp sequence and then sending the timestamp sequence to a data processing and control module; and the data processing and control module, which is used for generating a fluorescence decay curve and a fluorescence lifetime prediction result of the sample according to the timestamp sequence. The application can meet the application requirements of portability, low cost, high stability and high accuracy.

The present application relates to the technical field of gas turbine control, and discloses a heavy gas turbine fuel flow stability control method and device, comprising obtaining pressure temperature and component parameters, calling Joule-Thomson coefficient and real gas state equation, and calculating fluid thermodynamic parameters considering throttling effect; based on the parameters, parent pipe pressure and target flow, generating anti-blocking target pressure and calculating steady-state basic opening degree instruction; performing differential operation on intermediate pipe cavity pressure, and converting to generate dynamic feedforward compensation; determining static friction dead zone risk and generating asymmetric excitation pulse signal; superimposing the steady-state basic opening degree instruction, feedforward compensation and excitation pulse signal to generate the final control instruction. The present application improves the accuracy of flow calculation under low load conditions, avoids aerodynamic choking, and overcomes static friction and suppresses flow fluctuations through dynamic feedforward and excitation compensation, thereby improving the operating stability of the gas turbine.

The present invention provides a self-calibration method for the receiving coil of a transient electromagnetic instrument, belonging to the field of instruments in geophysical exploration; the transmitter of the transient electromagnetic instrument outputs two completely identical excitation pulse signals, and two damping resistors R with different resistances are respectively connected in parallel on the receiving coil d1 and R d2 , the receiver receives and records the output response signals D1 and D2; since in the two measurements, the excitation pulse and the receiving channel are stable, and at the same time when the system is static, the earth response remains consistent, so only the response of the receiving coil changes during the measurement, that is, the self-inductance L and the total capacitance C can be quantified by solving the response equation of the receiving coil; finally, according to the condition that the optimal damping coefficient ξ of the receiving coil is 1, the optimal damping resistor DR for correcting the receiving coil is determined. The present invention can effectively improve the shallow underground detection accuracy of the transient electromagnetic method.

The present disclosure describes systems and methods of magnetic resonance imaging (MRI) that provide B1 field mapping and B1 field spoiling without a plurality of B0 gradient fields. An off-resonant pulse may be applied, or delivered, to the object of interest following an excitation pulse to induce a phase shift, which may be measured to determine the B1 field map. Also, a spoiling off-resonant RF pulse may be applied, or delivered, to the object of interest to remove unwanted signal coherence pathways in the region of the object.

The invention provides a system and method for enhancing the spectrum demodulation rate of a dual-optical-frequency comb, and the system comprises a circulation light path which carries out the light splitting of excitation pulse light which is inputted to the circulation light path and corresponds to a first repetition frequency, thereby enabling one part of the excitation pulse light to be outputted towards a unit to be detected, and enabling the other part of the excitation pulse light to circulate along the circulation light path; the to-be-tested unit is used for modulating the excitation pulse light and outputting processing signal light carrying dynamic spectrum information generated based on an actual dynamic spectrum of the to-be-tested unit; the light combining unit is used for coupling the processing signal light and the sampling pulse light and outputting coupled signal light; the photoelectric detector performs light field cross-correlation-based detection on the coupled signal light and outputs a periodic electric signal; and the data acquisition and processing unit processes the periodic electric signal to obtain an actual dynamic spectrum corresponding to the unit to be detected. The detection efficiency is at least improved.

The invention relates to a magnetic resonance system, a magnetic resonance imaging sequence and an optimization method. The imaging sequence comprises: a radio frequency excitation pulse; the first radio frequency refocusing pulse and the second radio frequency refocusing pulse are sequentially applied after the radio frequency excitation pulse; original gradient pulses including a right side original pulse applied between the center of the first radio frequency refocusing pulse and the center of the second radio frequency refocusing pulse and a left side original pulse applied at the center of the radio frequency excitation pulse and the center of the first radio frequency refocusing pulse, the right side original pulse being applied between the center of the first radio frequency refocusing pulse and the center of the second radio frequency refocusing pulse, and the left side original pulse being applied between the center of the first radio frequency refocusing pulse and the center of the second radio frequency refocusing pulse. The left side original pulse comprises a first gradient pulse corresponding to the radio frequency excitation pulse; and a first balance pulse, the first balance pulse being located in a first time period between an end point of the first gradient pulse and a start point of the first radio frequency refocusing pulse, and the first balance pulse including a positive pulse and a negative pulse located on the first gradient axis.

The invention relates to a longitudinal relaxation time calculation method, nuclear magnetic resonance imaging equipment and a storage medium, and the method comprises the steps: executing a pulse sequence, and collecting a first multi-echo signal; the pulse sequence comprises a radio frequency pulse and a readout gradient, and the radio frequency pulse comprises a first excitation pulse and a plurality of second excitation pulses in a repetition time of the pulse sequence; the first multi-echo signal is a multi-echo signal acquired after executing a second excitation pulse; performing image reconstruction on the first multi-echo signal to obtain a multi-echo image; calculating target signal intensity according to a signal attenuation function and the information of the multi-echo image; and calculating the longitudinal relaxation time according to the target signal intensities of the plurality of repetition times. According to the invention, after a small number of first excitation pulses are applied, accurate longitudinal relaxation time distribution is obtained, and the problem of low calculation efficiency in the prior art is solved.

A monitoring device for monitoring operability of serially connected redundancy cutoff relays includes, a resonance circuit configured to be connected in parallel to each of the serially connected cutoff relays, wherein each of the resonance circuits comprise a primary inductivity; a transformer for each of the resonance circuits formed by the respective primary inductivity and a respective secondary inductivity; a excitation circuit for injecting an excitation pulse into the resonance circuits by means of the secondary inductivities of the transformers; a detection circuit configured to receive oscillation responses of the secondary inductivities caused by an oscillation in the resonance circuits initiated by the excitation pulse (Vpulse) and to output an output signal(S) indicating that a failure in the redundancy cutoff relays occurred if the oscillation responses are different.

A method is provided for operating a wireless charger having a multi-switch inverter which supplies an output PWM signal to a resonant circuit in response to switching control signals, including a first set of continuous excitation phase switching control signals (which generate the output PWM signal to have alternating positive and negative pulses having a first pulse frequency) and a second set of free resonance signal sensing phase switching control signals (which enable the resonant tank circuit to generate a resonant decaying output voltage signal in the presence of a foreign object that is located near the wireless charger), where each continuous excitation phase switching control signal includes a plurality of positive or negative excitation pulses having the first pulse frequency, and where one or more quality factor parameters of the wireless charger are measured based on one or more electrical parameters of the resonant decaying output voltage signal.

In a method for creating an image dataset of a mapping area situated in a measuring volume, k-space corresponding to the mapping area may be read out and image data may be reconstructed based on recorded first and second raw data points of k-space. The reading out of k-space may include: switching a gradient in the slice selection direction and a phase-encoding gradient in at least one further encoding direction, radiating a non-slice-selective radio-frequency (RF) excitation pulse, recording echo signals and storing them as first raw data points along a radial k-space trajectory predefined by the full strength of the phase-encoding gradients (Gp) further switched during recording of the echo signals, and reading out k-space corresponding to the mapping area as second raw data points.

The invention relates to a computer-implemented method for acquiring magnetic resonance data with a magnetic resonance device (18), wherein a magnetic resonance sequence is used in which, during an equilibrium state in a sequence segment maintained by regular excitation modules (9, 9a - 9e) with at least one excitation pulse, both a first readout time window (11, 11a - 11e) immediately following an excitation module (9, 9a - 9e) for measuring magnetic resonance data of a free induction decay and second readout time windows (12, 12a - 12e), which are spaced at least the first readout duration of the first readout time window (11, 11a - 11e) from a last excitation module (9, 9a - 9e), which acts as a refocusing module for the penultimate excitation module (9, 9a - 9e), are used for measuring magnetic resonance data of a spin echo. become,wherein, between at least one pair consisting of a starting excitation module (9c) and a final excitation module (9d) that follow one another, a fat saturation module (15) with at least one high-frequency fat saturation pulse (16) is output in the magnetic resonance sequence during a preparation period (14).

The application provides a wind turbine blade deicing system based on pulse deicing, which comprises a detection module, a deicing module and a deicing control module; the deicing module comprises an excitation coil and a skin, the excitation coil is attached to a deicing point of a fan blade, the skin is fixed to the surface of the fan blade at the deicing point and covers the excitation coil completely; the deicing control module comprises a control unit and an excitation driving unit; the control unit is used for receiving an ice coating detection signal output by the detection module and judging the ice coating thickness, and controlling the excitation driving unit to work according to the ice coating thickness, so as to output an excitation pulse to the corresponding excitation coil.

A wireless sensor reader configured to determine a resonant frequency of a sensor may include a transmit circuit configured to transmit a wireless excitation pulse to the sensor at a transmit frequency to excite a resonant circuit within the sensor to resonate at a frequency proportional to a measured parameter, and a receiver circuit configured to receive the resonant circuit from the sensor. The receiver circuit is configured to receive a response signal from the sensor, the response signal being a continuous wave at a resonant frequency of the sensor. The wireless sensor reader may also include circuitry for determining a frequency of the sensor response signal, where the reader selects a transmission frequency of the excitation pulse from a plurality of discrete narrowband frequencies, the selection occurring prior to determining the frequency of the sensor response signal.

Systems and techniques are provided for determining a time zero echo of a nuclear magnetic resonance (NMR) sequence. An example method includes obtaining, via an NMR tool in a borehole, echo waveforms associated with refocusing pulses and a free induction decay (FID) waveform associated with an excitation pulse; determining echo values based on the echo waveforms and an apparent time-zero echo value based on the FID waveform, the apparent time-zero echo value representing a time zero echo; applying a correction factor to the apparent time-zero echo value to yield a corrected time zero echo value; and determining a spectrum associated with a sample based on an inversion performed on the corrected time zero echo values and the set of echo values before or after a conversion of the corrected time zero echo value and the set of echo values to porosity units, the conversion of the corrected time zero echo value and the set of echo values being based on one or more conversion factors.

The invention provides a split type LIBS aluminum alloy sensitization degree on-site detection device and method, and relates to the technical field of laser spectrum analys.The split type LIBS aluminum alloy sensitization degree on-site detection device comprises a pulse generation module and a sample detection module, the pulse generation module is connected with the sample detection module through a corrugated pipe, and an energy transmission optical fiber, an LIBS signal optical fiber, a power source and a communication line are all connected with the pulse generation module; the energy transmission optical fiber transmits the high-energy excitation pulse to the long-wave-pass dichroscope, the high-energy excitation pulse is focused to the to-be-detected alloy, and an LIBS signal generated by exciting the to-be-detected alloy by the high-energy excitation pulse is reflected to the reflective optical fiber collimator through the long-wave-pass dichroscope and is transmitted to the pulse generation module through the LIBS signal optical fiber; the second optical fiber collimator, the reflector, the first lens, the second lens, the long-wave-pass dichroscope, the three-wavelength objective lens and the reflective optical fiber collimator are arranged on the light path debugging frame, and the light path debugging frame and the high-precision motion table are installed on the bottom plate. According to the invention, the accuracy and reliability of alloy sensitization degree evaluation can be improved.