30 results about "Quantum detection" patented technology

The invention relates to the technical field of mining exploration, and discloses a surface mine mining system and method based on a three-dimensional model, and the system comprises a three-dimensional modeling module which is used for fusing earth surface and deep geological data to construct a dynamic digital twinborn body, receiving environment dynamic sensing data, and calculating rock mass stress and a water flow coupling field in real time; the mining planning module is used for generating a mining step design and equipment scheduling instruction based on the lithologic parameters and stress distribution of the dynamic digital twin; the equipment control module is used for converting the equipment dispatching instruction into centimeter-level action control signals of a mine truck and an electric shovel through a low-delay communication chain; and the monitoring feedback module is used for collecting mining surface deformation and muck pile characteristic data. Through the dynamic digital twinborn body fusing earth surface centimeter-level scanning and deep quantum detection and stress and water flow coupling field real-time calculation, synchronous visualization of the rock mass mechanical state and hydrological response is achieved, full-time-domain geological perspective capacity is provided for mining decision, and mining efficiency is improved.

The invention relates to the technical field of power equipment operation and maintenance, and discloses a power equipment vibration defect identification method and system. Dynamically adjusting an acoustic vortex field orbital angular momentum mode corresponding to the target power equipment through a preset programmable metasurface array, and obtaining a resonance response signal of the equipment; carrying out compressed state laser irradiation and balanced zero beat detection on the resonance response signal to obtain a quantum correlation factor time sequence; reconstructing a resonance response signal phase space based on the quantum correlation factor time sequence, and calculating to obtain a correlation dimension and a maximum Lyapunov index; and performing defect identification based on the correlation dimension, the maximum Lyapunov index and a preset threshold to obtain defect identification data of the power equipment. According to the method, dynamic sound field excitation and quantum detection are combined, the vibration defects of the power equipment are recognized, and the technical problem that the recognition precision is low due to the fact that a sensor is high in measuring point dependence, low in environmental noise anti-interference capacity and insufficient in fault feature extraction in a traditional method is solved.

The invention discloses a current dipole-based magnetic impurity simulation method, device and system, belongs to the technical field of nondestructive testing, and solves the problem of how to improve the magnetic impurity simulation precision. Comprising the steps of inputting simulation parameters of target magnetic impurity particles, calculating target driving current, introducing a medium correction coefficient to perform reverse correction on the target driving current, and solving actual driving current; actual driving current is applied to the current dipole array of the selected level, and a simulated magnetic field is generated; an analog magnetic field signal is extracted based on a phase-locked amplification technology and is used for magnetic field signal inversion verification or sensitivity calibration. According to the method, the magnetic moment generated by the current dipole is equivalent to the excitation moment of the magnetic impurities, the medium correction coefficient k is introduced to carry out reverse correction on the target driving current, the actual driving current is solved, and the magnitude mapping relation from the magnetic impurity particle parameters to the actual driving current is established; and the accuracy and reliability of sensitivity calibration of the quantum detection equipment are improved.

The invention discloses a traveling wave microwave light quantum detection method and system and a superconducting quantum circuit, and the method comprises the steps: building a three-level dimer coupled wQED system model; based on the system model, obtaining an equation set containing the input and output relation of the system model and a photon detection efficiency expression; acquiring a key parameter group based on the equation set and the photon detection efficiency expression; and adjusting the structure and the coupling relationship of the system model according to the key parameter group, and realizing traveling wave microwave light quantum detection based on the adjusted system model. In the invention, the brand-new three-level dimer coupled wQED system model is provided, and the structure and the coupling relationship are adjusted under the condition of reasonably setting a key parameter group, so that large-bandwidth high-efficiency detection is realized in principle by using the number of atoms which is far less than that of atoms in a traditional scheme; the physical resources are greatly saved, and the complexity of the system is simplified.

This application relates to the field of quantum nondestructive testing technology, and discloses a quantum detection device and a xenon atom-based eddy current detection method. The quantum detection device includes an interconnected eddy current probe and a quantum measurement device. The quantum measurement device includes a xenon atom gas chamber for measuring the magnetic field strength of a target eddy current magnetic field. It acquires the target eddy current magnetic field of the target object, measures the magnetic field strength of the target eddy current magnetic field, and obtains the magnetic field strength distribution along the surface of the target object. Based on the magnetic field strength distribution, it detects thickness changes in the target object to obtain the weak point detection result. Its beneficial effect is that by measuring the eddy current magnetic field generated by the target object through a xenon atom gas chamber, it effectively utilizes the characteristics of xenon atoms—long coherence time and extremely low resonance frequency—thereby maintaining high sensitivity to capture weak magnetic fields at extremely low frequencies and obtaining a detection penetration depth far exceeding that of traditional sensors, achieving high-precision nondestructive testing of minute thickness differences inside the target object.

The application discloses a crude oil water content analysis method and device. The method comprises the following steps: obtaining low, medium and high energy level light quantum detection data of a penetrating crude oil sample; calculating photoelectric effect cross section coefficients of low and medium energy levels, simultaneously solving oil, gas and water phase fractions and calculating a first mixed density; combining Compton reaction cross section coefficient of high energy level data to calculate a second mixed density; comparing the deviation of the two mixed densities, if the deviation is greater than a preset threshold, the detection time is automatically extended for re-measurement; if the deviation is still greater than the preset threshold, it is determined that the sample is in a gas-containing or non-full-liquid state, the high energy level calculation result is actively removed, and only the low and medium energy level data are used to solve the phase fraction and normalized output the final water content. The application innovatively introduces a density deviation check and a dynamic delay mechanism, effectively distinguishes and separates the gas phase interference, and realizes non-contact and high-precision automatic water content detection.

The application relates to the technical field of spectral analysis, and discloses a fluorescence spectral analysis device and method based on a solid-state electron spin ensemble, wherein the spectral analysis device comprises a laser modulation unit, a confocal unit and a fluorescence processing unit; the laser modulation unit comprises a laser, a Griesinger-Taylor prism, an acousto-optic modulator, a beam expander, a collimating lens, a spatial light modulator, a spatial filter and a half-wave plate which are sequentially arranged; the confocal unit comprises a dichroic mirror, a focusing lens, a diamond and a microwave antenna which are sequentially arranged; the diamond has a solid-state electron spin NV color center; and the fluorescence processing unit comprises a filter group, a sleeve lens, a lens, a linear polarizer, a Bertin lens and a camera which are sequentially arranged. The application distinguishes the fluorescence generated by different axial NV color centers from the fluorescence level, and provides a thought and method for the miniaturization and bias magnetic field removal of a quantum detection device of the NV color center.

An entanglement-assisted multistatic quantum radar detection technique employs the integrated entangled source shared among multiple transmitters and performing transmit side optical phase conjugation. EA receivers are based on classical homodyne detection schemes. The EA multistatic radar detection technique is evaluated against bistatic radar EA detection scheme and various coherent states-based quantum detection schemes (the optimum quantum detector. Helstrom threshold detector, and random phase optimum quantum detector). The EA multistatic target detection probability is significantly better than that of corresponding bistatic radar EA detection techniques. coherent states-based quantum detection techniques. and the classical radar detection schemes. When both scattered signal photon channels and idler channels are noisy and lossy, the scheme significantly outperforms the EA bistatic radar scheme.

The application discloses a method for measuring position of a point light source by using spatial mode decomposition multiplexing, and the principle of the method is based on orthogonal projection measurement in quantum detection theory. The method converts direct measurement of distribution of light intensity of the point light source in a coordinate space into measurement of weights of each Hermite-Gaussian mode. In the specific operation, only the complex conjugate of the complex amplitude of each Hermite-Gaussian mode needs to be encoded into a computer hologram. By replacing different computer holograms, the photon number at the optical axis of the first-order diffraction light is recorded, and then the weights of the to-be-measured light field in each Hermite-Gaussian mode can be obtained after normalization. Compared with the traditional measurement, only one pixel is needed to achieve optimal measurement.

The invention provides a high-efficiency quantum detection device and method based on an area array detector, and is applied to the technical field of quantum light detection. A single-path photon signal is guided to a detection area through an optical coupling unit, and an array detection unit realizes multi-path parallel detection; and the signal synchronization processing unit performs independent delay adjustment and synthesis on multiple paths of electric signals, so that the technical problems of non-uniform spatial distribution of single-path photon signals, difficulty in multi-pixel electric signal management synchronization, signal distortion caused by response time difference and the like are effectively solved. The device has the advantages that the problems of spatial distribution of single-path photon signals, management synchronization of multi-pixel electric signals, response time difference compensation and the like are effectively solved, and the overall detection efficiency and the time resolution are remarkably improved.

The application provides a real-time entropy evaluation post-processing quantum random number generation method. The quality of random numbers determines the privacy and security of a communication system. Quantum detection is inevitable in the quantum random number generation process, which will introduce side information. Therefore, the quantum noise entropy content of the system must be strictly evaluated, and the random numbers must be post-processed by using a security information theory extractor. The application proposes to reconstruct the quantum state phase space distribution in real time in a continuous variable quantum random number generation scheme and measure the deviation from the ideal value. If the deviation reaches the rejudgment threshold, the entropy evaluation is updated in real time, so as to adjust the size of the post-processing matrix in real time. The seed used to construct the random extractor is also updated in real time. On this basis, the information theory security generalized hash post-processing of multiple quantum random numbers is realized in parallel. The application provides a cost-intensive and expandable random number real-time entropy evaluation post-processing scheme, which can effectively improve the actual security and practicability of the quantum random number generator.

The application discloses a kind of travelling wave microwave light quantum detection method, system and a superconducting quantum circuit, wherein the travelling wave microwave light quantum detection method includes: establishing three-level dimer coupling wQED system model;Based on system model, obtain the equation set containing system model input-output relationship and photon detection efficiency expression;Based on equation set and photon detection efficiency expression, obtain key parameter group;According to key parameter group, adjust the structure and coupling relationship of system model, realize the detection of travelling wave microwave light quantum based on adjusted system model.In the present application, this kind of brand-new three-level dimer coupling wQED system model is proposed, under the condition of reasonable setting key parameter group, adjust its structure and coupling relationship, and then realize high-efficiency detection with far less than the number of atoms of traditional scheme in principle to realize large bandwidth, greatly save physical resources, simplify the complexity of system.

This invention relates to a velocity measurement device based on the transient electromagnetic induction transparency effect. It utilizes two probe beams and two coupling beams to excite atoms in an atomic antenna to the Rydberg state. The probe beams are modulated into pulsed lasers to obtain the transient electromagnetic induction transparency signal of the Rydberg atoms. A first radio frequency signal source radiates electromagnetic waves to illuminate the target object; the reflected electromagnetic waves and the local oscillator electromagnetic waves radiated by a second radio frequency signal source simultaneously act on the Rydberg atoms at near-resonance. The velocity of the target object is measured by quantum precision measurement of the difference frequency signal generated by the interference of the two electromagnetic waves. Compared to traditional Rydberg atomic antennas, this invention's velocity measurement device based on the transient electromagnetic induction transparency effect can achieve velocity measurement of moving targets based on ultra-wideband, miniaturized quantum detection, thus expanding the functionality of Rydberg atomic antennas.

The invention discloses an air connection hybrid transmission method, device and equipment based on a private cloud quantum link, a medium and a product. Comprising the following steps: sending a quantum detection message containing a quantum entanglement pair to a private cloud transmission chain network, and determining a target quantum transmission link according to a feedback result of the quantum detection message; detecting a transmission quality parameter of the target quantum transmission link, and if the transmission quality parameter meets a preset data transmission requirement, constraining a transmission time parameter of the target quantum transmission link; if the transmission quality parameter does not meet the preset data transmission requirement, determining a target quantum route of an idle link in the private cloud transmission chain network; and transmitting the to-be-transmitted data through the target quantum transmission link or the target quantum route by adopting an air-connection hybrid transmission mode combining a classical channel and quantum transmission. According to the technical scheme, the private cloud data transmission stability and continuity are improved, the data security is guaranteed, the end-to-end delay is reduced, and the transmission efficiency is improved.

The invention discloses a miRNA (micro Ribonucleic Acid) quantum detection method based on plasmon enhancement. The method comprises the following steps: modifying gold nanocubes on the surface of a fluorescent nano-diamond to generate the nano-diamond with a local surface plasmon resonance enhancement effect; the preparation method comprises the following steps: preparing a plasmon enhanced nano-diamond probe and a silicon dioxide microsphere probe, and hybridizing target miRNA to form a sandwich structure compound; injecting the compound into a micro-fluidic chip with a micro-column array structure, so as to entrap and enrich the compound with the sandwich structure, and filtering to remove the uncombined plasmon enhanced nano-diamond probe; the compound is subjected to fluorescence signal detection, and quantum signal detection is combined, so that qualitative or quantitative analysis of the target miRNA is realized. The background of the free probe is reduced through microfluidic filtration, the detection repeatability is improved, the nanodiamond reading signal intensity is improved by combining plasmon enhancement, and the method has the advantages of being high in sensitivity, high in specificity, convenient to operate, suitable for trace sample detection and the like.

The invention discloses a quantum enhancement detection method and device based on dual-class heterodyne partition displacement, and the method comprises the steps: designing a hybrid quantum receiver based on a binary phase shift keying signal under the condition that a transmitting end uses a QPSK modulation signal, and deducing the error probability of the hybrid quantum receiver. The method has good detection performance, and can be practically used in a quantum detection system under the condition of considering the influence of the detection efficiency and quantum efficiency of the photon number detector.

This document discloses a method and a system for creating a state of health (SOH) prediction model for a battery. The method comprises receiving a data set containing gas emission data from at least one quantum detection (QD) sensor and performance data from at least one battery cell. It then processes the data set to derive at least one feature indicating the battery's performance and to predict the concentration states of at least one type of gas and at least one parameter. Furthermore, it involves creating an SOH prediction model to predict the deterioration of at least one component of at least one battery cell based on the processed data set and to calculate the SOH of the battery cell in association with the deterioration of at least one component.The creation process includes training the SOH prediction model to correlate the concentration of at least one type of gas and at least one battery parameter based on the derived at least one feature and predicted states.

The application relates to the technical field of quantum precision measurement, and is a kind of quantum detection system and detection method, which is used for detecting a to-be-measured microwave field generated by an external microwave radiation device, and comprises a quantum probe, a light source, a bias magnetic field module, a fluorescence detection module and a data processing module; the present scheme utilizes the corresponding relationship among diamond NV color centers, microwaves, light and magnetic fields, and designs a quantum microwave detection method and system capable of measuring external microwave fields; the quantum precision measurement technology can be used to realize accurate measurement of the microwave field; by arranging the bias magnetic field module, the energy level splitting degree of the diamond NV color center can be adjusted, and the resonance frequency of the diamond NV color center can be changed, so that the measurable frequency range of the diamond NV color center is expanded, and the applicability of the device is improved.

This invention provides an overvoltage quantum detection system and method for Rydberg atom antenna combined electrical appliances, relating to the field of overvoltage condition detection technology for power equipment. The detection system includes: a main control device, a transmission optical fiber, and multiple overvoltage Rydberg sensors; wherein, the main control device is used to generate detection and coupling lasers; the transmission optical fiber connects the main control device and the overvoltage Rydberg sensors, and is used to transmit the detection and coupling lasers; the multiple overvoltage Rydberg sensors are arranged in a three-half wiring configuration at each T-shaped connection point of the combined electrical appliance under test, and are used to sense the internal electric field signal of the combined electrical appliance under test based on the electromagnetically induced transparency effect of Rydberg atoms and the Autler-Townes splitting phenomenon; the main control device is also used to determine the fault location of the combined electrical appliance under overvoltage conditions based on the internal electric field signal sensed by the multiple overvoltage Rydberg sensors and the sensing time. This invention improves the accuracy of overvoltage fault location.

This invention relates to an electromagnetic field scanning system for diamond NV centers based on heterodyne detection, belonging to the field of microwave quantum detection technology. It includes a laser pumping module, a fluorescence collection module, a microwave pumping module, a magnetic field control module, and a scanning detection module. The laser pumping module generates a laser to excite the diamond NV centers to emit fluorescence signals. The microwave pumping module generates an injection microwave signal and a reference microwave signal with similar frequencies. The injection microwave signal is injected into the microwave radiation device under test to generate the microwave signal to be measured. The reference microwave signal and the microwave signal to be measured generate a heterodyne mixing signal. The magnetic field control module applies a static magnetic field to the diamond, enabling the diamond NV centers to resonate with the microwave signal to be measured and emit fluorescence response signals. The fluorescence collection module collects the fluorescence signal and obtains the spectrum, which is sent to the control unit. The control unit calculates the microwave signal to be measured based on the spectrum information. This invention solves the problem of the lack of a system solution for applying heterodyne detection to the detection of diamond NV centers in the prior art.

The utility model discloses a partial discharge quantum detection system, which relates to the technical field of discharge detection, and comprises a quantum capture assembly, a signal conversion assembly connected with the signal output end of the quantum capture assembly, and a data analysis processing assembly connected with the signal output end of the signal conversion assembly, the signal conversion assembly converts quantum signals of the quantum capture assembly into detection signals, and the data analysis and processing assembly analyzes and processes the detection signals output by the signal conversion assembly. The diamond NV color center quantum sensor has the beneficial effects that the characteristics of quantum entanglement, quantum superposition and the like in the diamond NV color center quantum sensor are utilized, measurement data with higher precision can be provided, and particularly, the spin state of the NV color center in the diamond NV color center quantum sensor is controlled through microwave pulses emitted by the microwave generator, so that the measurement accuracy is improved. And then high-sensitivity magnetic field measurement is realized by utilizing the principle that the electron spin energy level of the diamond NV color center generates Zeeman splitting under the action of an external magnetic field.

The invention discloses a partial discharge characteristic spectrum construction method and device based on a quantum detection technology, equipment and a storage medium. The method comprises the following steps: acquiring quantum detection signal data of to-be-detected high-voltage equipment through a preset light quantum sensor; performing feature extraction on the quantum detection signal data to obtain corresponding partial discharge feature information; classifying and marking the partial discharge feature information based on a preset defect type to obtain classified and marked partial discharge feature information; and constructing a partial discharge characteristic spectrum database according to the classified and labeled partial discharge characteristic information. According to the method, the quantum detection signal data generated by partial discharge can be accurately acquired in different scenes by using the light quantum sensor, and defect type labeling is carried out, so that the diversity of feature samples in the constructed partial discharge feature spectrum database is ensured, and rich data support is provided for subsequent state recognition and fault diagnosis of high-voltage equipment.

The invention provides an optical time domain reflection system based on single photon detection and a measurement method, and relates to the technical field of optical fiber sensing and quantum detection. According to the optical time domain reflection system based on single photon detection, a 1310 nm wave band pulse light source module is selected to provide a high-performance detection light source, a high-sensitivity single photon detector is adapted, and a wave band optical circulator reduces the insertion loss of a device; the single-photon-level detection sensitivity of the single-photon detector greatly improves the capturing capability of the optical time domain reflection system for weak backward Rayleigh scattering signals, and even in a long-distance transmission scene, weak optical signals after attenuation can still be effectively recognized, and the dynamic range of the optical time domain reflection system is remarkably widened; the narrow pulse detection light design is combined with the high time resolution characteristic of the time-to-digital converter, the photon arrival time and the corresponding optical fiber spatial position can be accurately positioned, the inherent contradiction between the dynamic range and the spatial resolution of a traditional OTDR is broken, and collaborative optimization of the two is achieved.

The application discloses a discharge detection method for insulators based on a ternary color space, and has the characteristics that the method comprises the following steps: collecting abnormal discharge of insulators by using a four-channel light quantum detection device to obtain four-channel spectral data; extracting RGB spectral features from RGB band spectral data in the four-channel spectral data respectively, and performing principal component analysis on full-band spectral data in the four-channel spectral data based on the RGB spectral features to obtain three principal components; calculating the correlation between the principal components and the RGB spectral features by using the load of the RGB spectral features in each principal component to obtain correlation coefficients; implementing adjustment on the RGB band spectral data collected by the RGB spectral channel through the correlation coefficients to update the RGB band spectral data, and detecting the discharge type of the insulators based on spectral features in the RGB spectral data.

The invention relates to the technical field of quantum precision measurement, and discloses fluorescent nano-diamond nitrogen vacancy color center-based in-situ active oxygen quantum detection equipment, which comprises a to-be-detected sample coupling module, an integrated laser module, a scanning confocal light path, an integrated circuit module and a data processing module. The to-be-tested sample coupling module is used for bearing samples in different forms; an acousto-optic modulator is arranged in the integrated laser module, and the integrated laser module is used for generating first-order diffraction light in a continuous wave mode and a pulse mode; the scanning confocal light path performs sample positioning and in-situ scanning by using a three-dimensional piezoelectric nano displacement table, and collects NV color center fluorescence; the integrated circuit module and the data processing module cooperatively execute an all-optical detection pulse sequence, double-index fitting is performed on a fluorescence-free evolution attenuation curve, and the spin depolarization time inversion active oxygen concentration of an internal color center is extracted. According to the invention, the influence of sample drift is effectively overcome, and high-spatial-resolution active oxygen in-situ quantitative detection is realized.

The invention relates to a quantum sealing detection device, which belongs to the technical field of quantum detection, is used for detecting a detected object I. The quantum sealing detection device comprises a tunable transmitter with an ionization cavity and an electron cavity, an air inlet unit, an ionization assembly, a Faraday cup assembly, a composite board and an air outlet assembly, an air inlet unit, wherein the tunable transmitter is provided with an air inlet pipe communicated with the air inlet unit; the ionization assembly is arranged in the tunable transmitter and is used for separating the ionization cavity and the electron cavity; the Faraday cup assembly is arranged on the tunable transmitter, and the tunable transmitter is provided with an air outlet pipe used for being communicated with the first measured object; the composite plate is in sealed connection with the Faraday cup assembly; and the air outlet assembly is communicated with the tested object 1. According to the invention, whether micro holes exist in the detected object can be judged through the quantum tunneling effect, so that the detected object can be detected.

The invention relates to the technical field of quantum nondestructive sensing, and provides a quantum detector which comprises a sensor, a magnetizer, a laser module, a microwave module, a second photodiode, a second filter and a data processing module. On the basis of the difference noise reduction principle of exciting light and photoinduced fluorescence, structural treatment is carried out around a small section of optical fiber connected with the diamond NV color center, and through the structural design of the tapered optical fiber, part of exciting light is converted by a photodiode in a short distance in the form of spatial light; and meanwhile, efficient acquisition of differential excitation light is realized through the design of a miniaturized and spatial light type light acquisition structural member, and development and application of an integrated and miniaturized sensor are promoted at the same time.

The utility model relates to a pulsed light output module and a single-photon detector calibration system, and belongs to the field of quantum detection. The pulse light output module included in the single-photon detector calibration system comprises the pulse laser, the continuous laser and the waveguide with the sum frequency characteristic, and after pulse light and continuous light are input into the waveguide at the same time, the needed pulse light is output by utilizing the sum frequency characteristic of the waveguide. By adjusting the wavelength of the continuous laser and changing the matching temperature of the waveguide, the wavelength of the output required pulsed light can be changed on the premise that the pulsed light is not changed, and compared with a single-wavelength pulse laser, the pulsed light output module has the advantages that the adjustable range of the wavelength of the pulsed light output by the pulsed light output module is wider; a large number of pulse lasers can be prevented from being adopted, and output of some pulse light with the wavelength not easy to achieve in engineering can be achieved. Therefore, the cost of the single-photon detector calibration system can be remarkably reduced, and the application range is widened.

The invention relates to a speed measuring device based on a transient electromagnetic induction transparency effect. Two beams of detection light and two beams of coupling light are utilized to excite atoms in an atomic antenna to a Rydberg state; modulating the detection light into pulse laser to obtain a transient electromagnetic induction transparent signal of Rydberg atoms; the first radio-frequency signal source radiates electromagnetic waves to irradiate a target object, signal electromagnetic waves reflected by the first radio-frequency signal source and local oscillation electromagnetic waves radiated by the second radio-frequency signal source simultaneously act on Rydberg atoms in a near-resonance mode, quantum precision measurement is carried out on difference frequency signals generated by interference of the two beams of electromagnetic waves, and speed measurement of the target object is achieved. Compared with a traditional Rydberg atom antenna, the speed measuring device based on the transient electromagnetic induction transparency effect can measure the speed of a moving target object on the basis of ultra-wideband and miniaturized quantum detection, and the function of the Rydberg atom antenna is expanded.

The invention belongs to the technical field of optical fiber sensing and light quantum detection, and particularly relates to an optical fiber length measuring device and method based on non-local intensity modulation. According to the non-local intensity modulation-based optical fiber length measuring device provided by the invention, the energy-time entangled light source, the circulator, the polarization controller, the intensity modulator and the single-photon detector are integrated, so that a system for measuring the length of the optical fiber at high precision is effectively constructed. According to the scheme, the characteristic of energy-time entanglement is successfully utilized, and the distance measurement precision in the optical fiber is improved. According to the invention, the quantum correlation characteristic of the energy-time entangled photon pair is utilized, the measurement sensitivity of the energy-time entangled photon pair can break through the limitation of time jitter of a detector in principle, and distributed sensing with long measurement distance and high spatial resolution is realized at the same time.