Quantum navigation positioning device and method

Abstract

A quantum navigation and positioning device and method belongs to the field of data processing technology, and includes: a controller that receives and pre-processes photon information of entangled photon pairs; and a controller that executes a quantum navigation and positioning algorithm. The controller applies a Kalman filter algorithm to the data collected by the photon detector to perform denoising processing, thereby improving the quality and availability of the data collected by the photon detector and preparing for subsequent quantum navigation and positioning calculations. The photon detector operates in a low-temperature environment, and the temperature range of the low-temperature environment is 2K to 3K. The use of a low-temperature environment can reduce the noise of the photon detector and provide a guarantee for obtaining high-quality photon measurement data. This effectively avoids the defects of the prior art in that the photon detectors used for quantum navigation and positioning are often interfered with by noise, resulting in poor detection performance, and the photon detectors are also interfered with by noise during the transmission of their collected data to the controller for quantum navigation and positioning, which is not conducive to the effect of quantum navigation and positioning.

Description

Technical Field

[0001] The present invention belongs to the field of data processing technology, and specifically relates to a quantum navigation positioning device and method. Background Art

[0002] Quantum navigation and positioning can be used in GPS blind spots such as geological exploration hundreds of meters underground, deep-sea diving, and urban canyons. Quantum navigation can achieve centimeter-level positioning. For example, a drone equipped with a quantum magnetometer can achieve an accuracy of 10 centimeters in a satellite-denied environment.

[0003] As mentioned in the prior art solution with patent publication number "CN114397667B", the application of quantum navigation and positioning is becoming more and more extensive.

[0004] However, the current quantum navigation positioning method still has the following defects:

[0005] 1. Photon detectors used for quantum navigation and positioning are often interfered with by noise, resulting in poor detection performance;

[0006] 2. The photon detector will also be interfered by noise when transmitting the collected data to the controller for quantum navigation positioning, which will be detrimental to the effect of quantum navigation positioning. Summary of the Invention

[0007] To address the defects in the prior art, the present invention proposes a quantum navigation and positioning device and method, which effectively avoids the defects in the prior art that the photon detectors used for quantum navigation and positioning are often interfered with by noise, resulting in poor detection performance, and the photon detectors are also interfered with by noise when transmitting the collected data to the controller for quantum navigation and positioning, which is not conducive to the effect of quantum navigation and positioning.

[0008] The present invention utilizes the following technical solutions.

[0009] A quantum navigation positioning method, comprising:

[0010] Step 1: The controller receives and pre-processes the photon information of the entangled photon pair;

[0011] Step 2: The controller executes the quantum navigation positioning algorithm.

[0012] Furthermore, step 1 specifically includes:

[0013] Step 1-1: The photon detector obtains the arrival time difference and polarization angle of the incoming entangled photon pair. The arrival time difference of the entangled photon pair is the absolute value of the difference between the times when the two photons of the entangled photon pair arrive at the photon detector;

[0014] Step 1-2: The photon detector transmits the arrival time difference and polarization angle of the entangled photon pair to the controller. The arrival time difference and polarization angle of the entangled photon pair are the data collected by the photon detector;

[0015] Step 1-3: The controller uses the Kalman filter algorithm to perform denoising on the data collected by the photon detector.

[0016] Furthermore, step 2 specifically includes:

[0017] Step 2-1: Construct the following quantum navigation positioning formula:

[0018]

[0019] in is the distance from the local location to the destination, is the speed of light, is the arrival time difference of the entangled photon pair, is the polarization angle;

[0020] Step 2-2: Execute the quantum navigation positioning formula to obtain the distance from the local location to the destination, thereby achieving the purpose of quantum navigation positioning.

[0021] Furthermore, the photon detector operates in a low temperature environment, and the temperature range of the low temperature environment is 2K to 3K.

[0022] Furthermore, the method for generating entangled photon pairs is: placing a quantum emitter in an optical microcavity, and utilizing the interaction between the optical microcavity and the emitter to generate entangled photon pairs.

[0023] Furthermore, during the execution of the quantum navigation positioning method, fault detection is also performed on the photon detector, and the fault detection method includes:

[0024] Step 3: During the execution of the quantum navigation positioning method, data collection and preprocessing are performed on the photon detector;

[0025] Step 4: Extract features from the voltage and current data of the filtered photon detector;

[0026] Step 5: Perform fault judgment on the photon detector based on the eigenvalues ​​obtained by feature extraction, that is, set corresponding reasonable thresholds for each eigenvalue in advance. When there is a eigenvalue obtained by feature extraction that exceeds its corresponding reasonable threshold, it is judged that the photon detector has a fault.

[0027] Furthermore, step 3 specifically includes:

[0028] Step 3-1: During the execution of the quantum navigation positioning method, a voltage sensor and a current sensor connected to the controller are used to respectively collect voltage data and current data of the photon detector in real time and transmit them to the controller;

[0029] Step 3-2: The controller performs filtering processing on the collected voltage data and current data of the photon detector.

[0030] Furthermore, step 4 specifically includes:

[0031] Step 4-1: Calculate the effective value, average value, and peak value of the voltage data and current data of the photon detector after filtering;

[0032] Step 4-2: Analyze the harmonic content and spectral distribution of the voltage and current data of the photon detector after filtering;

[0033] Step 4-3: Calculate the phase difference and power factor of the voltage data and current data of the photon detector after filtering. The effective value, average value, peak value, harmonic content, spectrum distribution phase difference, and power factor of the voltage data and current data of the photon detector after filtering are the characteristic values ​​obtained by feature extraction.

[0034] Furthermore, step 4-1 specifically includes:

[0035] The voltage data of the photon detector after filtering is defined as , the current data of the photon detector after filtering is , is the sampling time, and the sampling time interval is , the number of voltage data of the photon detector after filtering or the current data of the photon detector after filtering is ;

[0036] The voltage RMS value of the photon detector voltage data after filtering ;

[0037] The effective current value of the current data of the photon detector after filtering ;

[0038] The average value of the voltage data of the filtered photon detectors is the average value of the voltage data of all filtered photon detectors;

[0039] The average value of the current data of the filtered photon detectors is the average value of the current data of all filtered photon detectors;

[0040] The peak value of the voltage data of the photon detector after filtering is the maximum value of the voltage data of all the photon detectors after filtering;

[0041] The peak value of the current data of the photon detector after filtering is the maximum value of the current data of all the photon detectors after filtering.

[0042] Furthermore, step 4-2 specifically includes:

[0043] Step 4-2-1: Perform fast Fourier transform (FFT) on the voltage data and current data of the photon detector after filtering;

[0044] Step 4-2-2: Perform harmonic analysis on the filtered voltage and current data of the photon detector.

[0045] Furthermore, step 4-2-1 specifically includes:

[0046] Step 4-2-1-1: Perform windowing on the voltage and current data of the photon detector after filtering;

[0047] Step 4-2-1-2: Apply fast Fourier transform (FFT) to convert the time domain signals of the voltage data and current data of the filtered photon detector into frequency domain signals, thereby obtaining the frequency spectrum distribution of the voltage data and current data of the filtered photon detector.

[0048] Furthermore, step 4-2-2 specifically includes:

[0049] Step 4-2-2-1: Determine the fundamental frequency and the frequencies of each harmonic based on the Fast Fourier Transform (FFT) calculation results;

[0050] Step 4-2-2-2: Apply the Fourier series expansion method to calculate the amplitude and phase of each harmonic.

[0051] Step 4-2-2-3: Get the harmonic content. The harmonic content is the ratio of the harmonic amplitude to the fundamental amplitude.

[0052] Furthermore, the Fast Fourier Transform FFT includes:

[0053] Define the first A voltage signal or a current signal is , the length is , after fast Fourier transform FFT, we get .

[0054] The formula for Fast Fourier Transform FFT is: ,in , is the length of the voltage signal or current signal, is the first obtained after fast Fourier transform FFT values;

[0055] Harmonic amplitude ;

[0056] Harmonic Phase ;

[0057] Harmonic content: , is the fundamental amplitude.

[0058] Furthermore, step 4-3 specifically includes:

[0059] Step 4-3-1: Perform zero-crossing detection on the voltage signal and current signal of the photon detector after filtering;

[0060] Step 4-3-2: Calculate the phase difference between the voltage signal and the current signal of the photon detector after filtering. That is, calculate the angle value of the phase difference based on the zero-crossing time difference and the sampling period.

[0061] Step 4-3-3: Calculate the power factor of the voltage signal and current signal of the filtered photon detector, that is, calculate the power factor using the power factor formula based on the calculated phase difference.

[0062] Furthermore, step 4-3-1 specifically includes:

[0063] Step 4-3-1-1: Detect the zero-crossing points of the voltage signal and current signal of the filtered photon detector respectively;

[0064] Step 4-3-1-2: Record the timestamp of the zero-crossing point;

[0065] Step 4-3-1-3: Calculate the difference between the timestamps of the zero-crossing points to obtain the zero-point time difference, which is a preliminary estimate of the phase difference.

[0066] Furthermore, the algorithm formula of step 4-3 is:

[0067] The timestamp of the zero-crossing point of the voltage signal of the photon detector after filtering is defined as , the timestamp of the current signal of the photon detector after filtering is , the sampling period is , then the phase difference for:

[0068] ;

[0069] Power Factor for: .

[0070] A quantum navigation and positioning device, comprising:

[0071] A photon detector is provided locally, and an entangled photon pair generating device is provided at the destination to be quantum navigation positioned, with the photon detector and the entangled photon pair generating device being arranged facing each other;

[0072] The photon detector is connected to the controller;

[0073] The entangled photon pair generating device is used to transmit the generated entangled photon pair to the optical detector;

[0074] The optical detector is used to transmit the arrival time difference and polarization angle of the obtained entangled photon pair to the controller. The arrival time difference and polarization angle of the entangled photon pair are the data collected by the photon detector;

[0075] The modules running on the controller include:

[0076] A receiving module, which is used to receive and pre-process photon information of entangled photon pairs;

[0077] An execution module is used to execute the quantum navigation positioning algorithm.

[0078] Furthermore, the entangled photon pair generating device includes an optical microcavity, which is used to place the quantum emitter.

[0079] Furthermore, the photon detector is a superconducting nanowire single photon detector.

[0080] The beneficial effects of the present invention are that, compared with the prior art, the technical effects of the present invention include:

[0081] The controller of the present invention receives and pre-processes the photon information of the entangled photon pairs; the controller executes the quantum navigation positioning algorithm. The controller uses the Kalman filter algorithm to perform denoising on the data collected by the photon detector, thereby improving the quality and availability of the data collected by the photon detector and preparing for subsequent quantum navigation positioning calculations. The photon detector operates in a low-temperature environment, and the temperature range of the low-temperature environment is 2K to 3K. The use of a low-temperature environment can reduce the noise of the photon detector, providing a guarantee for obtaining high-quality photon measurement data. Efficient calculation from photon measurement data to precise position information is achieved. Advanced photon detector technology is applied to improve measurement accuracy and sensitivity. It can more accurately capture the subtle features of the photon pair, providing a more reliable data basis for navigation and positioning. By fully utilizing the characteristics of quantum physics, the limitations of traditional navigation and positioning methods are broken through, and the accuracy of quantum navigation and positioning is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0082] Figure 1 is a flow chart of the quantum navigation positioning method described in the present invention;

[0083] Figure 2 This is a partial structural diagram of the quantum navigation and positioning device described in the present invention. DETAILED DESCRIPTION

[0084] To make the objectives, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely express the technical solutions of the present invention. The embodiments expressed in this application are only some embodiments of the present invention, not all embodiments. Based on the spirit of the present invention, other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0085] like Figure 1 As shown, the quantum navigation positioning method described in the present invention includes:

[0086] The quantum navigation positioning method of the present invention ensures the ultra-high precision and stability of the photon detector to accurately capture tiny changes in photon signals, and processes and analyzes complex photon pair information, overcoming the influence of noise and interference, and providing a corresponding positioning algorithm to achieve fast and accurate navigation positioning calculations.

[0087] Step 1: The controller receives and pre-processes the photon information of the entangled photon pair;

[0088] In a preferred but non-limiting embodiment of the present invention, step 1 specifically comprises:

[0089] Step 1-1: The photon detector obtains the arrival time difference and polarization angle of the incoming entangled photon pair. The arrival time difference of the entangled photon pair is the absolute value of the difference between the times when the two photons of the entangled photon pair arrive at the photon detector;

[0090] Step 1-2: The photon detector transmits the arrival time difference and polarization angle of the entangled photon pair to the controller. The arrival time difference and polarization angle of the entangled photon pair are the data collected by the photon detector; the data collected by the photon detector is also the photon information of the entangled photon pair.

[0091] Step 1-3: The controller uses the Kalman filter algorithm to perform denoising on the data collected by the photon detector.

[0092] The controller uses the Kalman filter algorithm to denoise the data collected by the photon detector, which improves the quality and availability of the data collected by the photon detector and prepares for subsequent quantum navigation positioning calculations.

[0093] Step 2: The controller executes the quantum navigation positioning algorithm.

[0094] In a preferred but non-limiting embodiment of the present invention, step 2 specifically comprises:

[0095] Step 2-1: Based on the Bell inequality of quantum entanglement, construct the following quantum navigation positioning formula:

[0096]

[0097] in is the distance from the local location to the destination, is the speed of light, is the arrival time difference of the entangled photon pair, is the polarization angle.

[0098] Step 2-2: Execute the quantum navigation positioning formula to obtain the distance from the local location to the destination, thereby achieving the purpose of quantum navigation positioning.

[0099] Step 2 achieves efficient calculations from photon measurement data to precise position information. Advanced photon detector technology improves measurement accuracy and sensitivity. This allows for more accurate capture of subtle characteristics of photon pairs, providing a more reliable data foundation for navigation and positioning. By fully leveraging the properties of quantum physics, this method overcomes the limitations of traditional navigation and positioning methods and improves the accuracy of quantum navigation and positioning.

[0100] In a preferred but non-limiting embodiment of the present invention, the photon detector operates in a cryogenic environment, wherein the temperature of the cryogenic environment ranges from 2 K to 3 K. The use of a cryogenic environment can reduce noise in the photon detector, thereby ensuring the acquisition of high-quality photon measurement data.

[0101] In a preferred but non-limiting embodiment of the present invention, the method for generating entangled photon pairs is: placing a quantum emitter (such as a single atom or quantum dot) in an optical microcavity, and utilizing the interaction between the optical microcavity and the emitter to generate entangled photon pairs.

[0102] In addition, if a photon detector fails during the execution of the quantum navigation positioning method, the quantum navigation positioning method cannot be performed normally. However, there is currently no method for detecting whether a photon detector has failed.

[0103] As an improvement, in a preferred but non-limiting embodiment of the present invention, during the execution of the quantum navigation positioning method, fault detection is also performed on the photon detector, and the fault detection method includes:

[0104] Accurately acquire the voltage and current data of the photon detector and ensure its accuracy and real-time performance. Identify fault characteristics from complex voltage and current changes to avoid misjudgment. Establish effective judgment criteria and thresholds to adapt to photon detectors of different models and operating conditions. The corresponding fault detection methods are as follows:

[0105] Step 3: During the execution of the quantum navigation positioning method, data collection and preprocessing are performed on the photon detector;

[0106] In a preferred but non-limiting embodiment of the present invention, step 3 specifically comprises:

[0107] Step 3-1: During the execution of the quantum navigation positioning method, a high-precision voltage sensor and current sensor connected to the controller are used to respectively collect voltage data and current data of the photon detector in real time and transmit them to the controller;

[0108] The starting sampling moment, sampling time and sampling frequency of the voltage data and current data of the photon detector are the same.

[0109] Step 3-2: The controller filters the collected voltage data and current data of the photon detector to remove interference signals.

[0110] Step 3 provides reliable raw data for fault diagnosis of the photon detector.

[0111] Step 4: Extract features from the voltage and current data of the filtered photon detector;

[0112] In a preferred but non-limiting embodiment of the present invention, step 4 specifically comprises:

[0113] Step 4-1: Calculate the statistical characteristics of the voltage data and current data of the photon detector after filtering, such as the effective value, average value, and peak value;

[0114] In a preferred but non-limiting embodiment of the present invention, step 4-1 specifically comprises:

[0115] The voltage data of the photon detector after filtering is defined as , the current data of the photon detector after filtering is , is the sampling time, and the sampling time interval is , the number of voltage data of the photon detector after filtering or the current data of the photon detector after filtering is ;

[0116] The voltage RMS value of the photon detector voltage data after filtering ;

[0117] The effective current value of the current data of the photon detector after filtering ;

[0118] The average value of the voltage data of the filtered photon detectors is the average value of the voltage data of all filtered photon detectors;

[0119] The average value of the current data of the filtered photon detectors is the average value of the current data of all filtered photon detectors;

[0120] The peak value of the voltage data of the photon detector after filtering is the maximum value of the voltage data of all the photon detectors after filtering;

[0121] The peak value of the current data of the photon detector after filtering is the maximum value of the current data of all the photon detectors after filtering.

[0122] Step 4-2: Analyze the harmonic content and spectral distribution of the voltage and current data of the photon detector after filtering;

[0123] In a preferred but non-limiting embodiment of the present invention, step 4-2 specifically comprises:

[0124] Accurately separate and extract the harmonic components in voltage and current. Process a large amount of sampled data (filtered voltage and current data from the photon detector) to obtain a precise spectrum distribution. Adapt to harmonic signals of different frequencies and amplitudes. The specific steps are as follows:

[0125] Step 4-2-1: Perform fast Fourier transform (FFT) on the voltage data and current data of the photon detector after filtering;

[0126] In a preferred but non-limiting embodiment of the present invention, step 4-2-1 specifically includes:

[0127] Step 4-2-1-1: Perform windowing processing on the voltage data and current data of the photon detector after filtering, such as Hanning window, Henning window, etc., to reduce spectrum leakage;

[0128] Step 4-2-1-2: Apply fast Fourier transform (FFT) to convert the time domain signals of the voltage data and current data of the filtered photon detector into frequency domain signals, thereby obtaining the frequency spectrum distribution of the voltage data and current data of the filtered photon detector.

[0129] Step 4-2-1 efficiently converts the voltage data and current data of the filtered photon detector from the time domain to the frequency domain to obtain the spectrum distribution.

[0130] Step 4-2-2: Perform harmonic analysis on the filtered voltage and current data of the photon detector.

[0131] In a preferred but non-limiting embodiment of the present invention, step 4-2-2 specifically includes:

[0132] Step 4-2-2-1: Determine the fundamental frequency and the frequencies of each harmonic based on the Fast Fourier Transform (FFT) calculation results;

[0133] Step 4-2-2-2: Apply the Fourier series expansion method to calculate the amplitude and phase of each harmonic.

[0134] Step 4-2-2-3: Get the harmonic content. The harmonic content is the ratio of the harmonic amplitude to the fundamental amplitude.

[0135] Step 4-2-2 quantitatively evaluates the harmonic components in the voltage data and current data of the photon detector after filtering.

[0136] In a preferred but non-limiting embodiment of the present invention, the Fast Fourier Transform FFT comprises:

[0137] Define the first A voltage signal or a current signal is , the length is , after fast Fourier transform FFT, we get .

[0138] The formula for Fast Fourier Transform FFT is: ,in , is the length of the voltage signal or current signal, is the first obtained after fast Fourier transform FFT values;

[0139] Harmonic amplitude ;

[0140] Harmonic Phase ;

[0141] Harmonic content: , is the fundamental amplitude.

[0142] In step 4-2, the windowing function is selected based on the signal characteristics, such as the Henning window for signals with sudden changes. This effectively reduces spectral leakage and improves the accuracy of harmonic analysis. Deep learning-based features are combined to automatically extract harmonic features, complementing traditional algorithms. This adapts to complex and changing harmonic patterns, improving the adaptability and accuracy of analysis.

[0143] Step 4-3: Calculate the phase difference and power factor of the voltage data and current data of the photon detector after filtering. The effective value, average value, peak value, harmonic content, spectrum distribution phase difference, and power factor of the voltage data and current data of the photon detector after filtering are the characteristic values ​​obtained by feature extraction.

[0144] In a preferred but non-limiting embodiment of the present invention, step 4-3 specifically comprises:

[0145] Accurately measure the phase information of the filtered photon detector's voltage and current data to avoid the accumulation of measurement errors. Process the filtered photon detector's voltage and current signals of different frequencies and waveforms to ensure the versatility of the calculation method. The main steps are as follows:

[0146] Step 4-3-1: Perform zero-crossing detection on the voltage signal and current signal of the photon detector after filtering;

[0147] In a preferred but non-limiting embodiment of the present invention, step 4-3-1 specifically includes:

[0148] Step 4-3-1-1: Detect the zero-crossing points of the voltage signal and current signal of the filtered photon detector respectively;

[0149] Step 4-3-1-2: Record the timestamp of the zero-crossing point;

[0150] Step 4-3-1-3: Calculate the difference between the timestamps of the zero-crossing points to obtain the zero-point time difference, which is a preliminary estimate of the phase difference.

[0151] Step 4-3-1 obtains key information of phase difference through zero-crossing detection.

[0152] Step 4-3-2: Calculate the phase difference between the voltage signal and the current signal of the photon detector after filtering. That is, calculate the angle value of the phase difference based on the zero-crossing time difference and the sampling period.

[0153] Step 4-3-3: Calculate the power factor of the voltage signal and current signal of the filtered photon detector, that is, calculate the power factor using the power factor formula based on the calculated phase difference.

[0154] Step 4-3-3 accurately calculates the power factor, which provides an important indicator for evaluating the performance of the photon detector.

[0155] In a preferred but non-limiting embodiment of the present invention, the algorithm formula of step 4-3 is:

[0156] The timestamp of the zero-crossing point of the voltage signal of the photon detector after filtering is defined as , the timestamp of the current signal of the photon detector after filtering is , the sampling period is , then the phase difference for:

[0157] ;

[0158] Power Factor for: .

[0159] Step 4-3 is adaptable to different types of voltage and current signals, improving the versatility and reliability of the calculation method.

[0160] Step 4 extracts key features that can reflect the working status of the photon detector from the raw data.

[0161] Step 5: Perform fault judgment on the photon detector based on the eigenvalues ​​obtained by feature extraction, that is, set corresponding reasonable thresholds for each eigenvalue in advance according to specific requirements. When a eigenvalue obtained by feature extraction exceeds its corresponding reasonable threshold, it is judged that the photon detector has a fault.

[0162] Combining multiple characteristic values ​​of voltage and current for fault diagnosis instead of relying on a single characteristic can more comprehensively reflect the working status of the photon detector and reduce the possibility of misjudgment.

[0163] like Figure 2 As shown, the quantum navigation and positioning device of the present invention includes:

[0164] A photon detector is provided locally, and an entangled photon pair generating device is provided at the destination to be quantum navigation positioned, with the photon detector and the entangled photon pair generating device being arranged facing each other;

[0165] The photon detector is connected to a controller; the controller can be a PLC or an industrial computer.

[0166] The entangled photon pair generating device is used to transmit the generated entangled photon pair to the optical detector;

[0167] The optical detector is used to transmit the arrival time difference and polarization angle of the obtained entangled photon pair to the controller. The arrival time difference and polarization angle of the entangled photon pair are the data collected by the photon detector; the data collected by the photon detector is also the photon information of the entangled photon pair.

[0168] The modules running on the controller include:

[0169] A receiving module, which is used to receive and pre-process photon information of entangled photon pairs;

[0170] An execution module is used to execute the quantum navigation positioning algorithm.

[0171] In a preferred but non-limiting embodiment of the present invention, the device for generating entangled photon pairs includes an optical microcavity with a high quality factor, and the optical microcavity is used to place a quantum emitter.

[0172] The entangled photon pair generating device can enhance the interaction between photons and matter, and improve the generation efficiency and entanglement quality of entangled photon pairs.

[0173] In a preferred but non-limiting embodiment of the present invention, the photon detector is a superconducting nanowire single photon detector.

[0174] The beneficial effects of the present invention are that, compared with the prior art, the technical effects of the present invention include:

[0175] The controller of the present invention receives and pre-processes the photon information of the entangled photon pairs; the controller executes the quantum navigation positioning algorithm. The controller uses the Kalman filter algorithm to perform denoising on the data collected by the photon detector, thereby improving the quality and availability of the data collected by the photon detector and preparing for subsequent quantum navigation positioning calculations. The photon detector operates in a low-temperature environment, and the temperature range of the low-temperature environment is 2K to 3K. The use of a low-temperature environment can reduce the noise of the photon detector, providing a guarantee for obtaining high-quality photon measurement data. Efficient calculation from photon measurement data to precise position information is achieved. Advanced photon detector technology is applied to improve measurement accuracy and sensitivity. It can more accurately capture the subtle features of the photon pair, providing a more reliable data basis for navigation and positioning. By fully utilizing the characteristics of quantum physics, the limitations of traditional navigation and positioning methods are broken through, and the accuracy of quantum navigation and positioning is improved.

[0176] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not deviate from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A quantum navigation positioning method, characterized in that: include: Step 1: The controller receives and pre-processes the photon information of the entangled photon pair; Step 2: The controller executes the quantum navigation positioning algorithm; Step 2 specifically includes: Step 2-1: Construct the following quantum navigation positioning formula: in is the distance from the local location to the destination, is the speed of light, is the arrival time difference of the entangled photon pair, is the polarization angle; Step 2-2: Execute the quantum navigation positioning formula to obtain the distance from the local location to the destination, thereby achieving the purpose of quantum navigation positioning.

2. The quantum navigation positioning method according to claim 1, characterized in that: Step 1 specifically includes: Step 1-1: The photon detector obtains the arrival time difference and polarization angle of the incoming entangled photon pair. The arrival time difference of the entangled photon pair is the absolute value of the difference between the times when the two photons of the entangled photon pair arrive at the photon detector; Step 1-2: The photon detector transmits the arrival time difference and polarization angle of the entangled photon pair to the controller. The arrival time difference and polarization angle of the entangled photon pair are the data collected by the photon detector; Step 1-3: The controller uses the Kalman filter algorithm to perform denoising on the data collected by the photon detector.

3. The quantum navigation positioning method according to claim 2, characterized in that: The photon detector works in a cryogenic environment, and the temperature range of the cryogenic environment is 2K to 3K; The method for generating entangled photon pairs is: placing a quantum emitter in an optical microcavity, and utilizing the interaction between the optical microcavity and the emitter to generate entangled photon pairs.

4. The quantum navigation positioning method according to claim 3, characterized in that: During the execution of the quantum navigation positioning method, fault detection is also performed on the photon detector, and the fault detection method includes: Step 3: During the execution of the quantum navigation positioning method, data collection and preprocessing are performed on the photon detector; Step 4: Extract features from the voltage and current data of the filtered photon detector; Step 5: Perform fault judgment on the photon detector based on the eigenvalues ​​obtained by feature extraction, that is, set corresponding reasonable thresholds for each eigenvalue in advance. When there is a eigenvalue obtained by feature extraction that exceeds its corresponding reasonable threshold, it is judged that the photon detector has a fault.

5. The quantum navigation positioning method according to claim 4, characterized in that: Step 3 specifically includes: Step 3-1: During the execution of the quantum navigation positioning method, a voltage sensor and a current sensor connected to the controller are used to respectively collect voltage data and current data of the photon detector in real time and transmit them to the controller; Step 3-2: The controller filters the collected voltage data and current data of the photon detector; Step 4 specifically includes: Step 4-1: Calculate the effective value, average value, and peak value of the voltage data and current data of the photon detector after filtering; Step 4-2: Analyze the harmonic content and spectral distribution of the voltage and current data of the photon detector after filtering; Step 4-3: Calculate the phase difference and power factor of the voltage data and current data of the photon detector after filtering. The effective value, average value, peak value, harmonic content, spectral distribution phase difference, and power factor of the voltage data and current data of the photon detector after filtering are the characteristic values ​​obtained by feature extraction; Step 4-1 specifically includes: The voltage data of the photon detector after filtering is defined as , the current data of the photon detector after filtering is , is the sampling time, and the sampling time interval is , the number of voltage data of the photon detector after filtering or the current data of the photon detector after filtering is ; The voltage RMS value of the photon detector voltage data after filtering ; The effective current value of the current data of the photon detector after filtering ; The average value of the voltage data of the filtered photon detectors is the average value of the voltage data of all filtered photon detectors; The average value of the current data of the filtered photon detectors is the average value of the current data of all filtered photon detectors; The peak value of the voltage data of the photon detector after filtering is the maximum value of the voltage data of all the photon detectors after filtering; The peak value of the current data of the photon detector after filtering is the maximum value of the current data of all the photon detectors after filtering; Step 4-2 specifically includes: Step 4-2-1: Perform fast Fourier transform (FFT) on the voltage data and current data of the photon detector after filtering; Step 4-2-2: Perform harmonic analysis on the voltage data and current data of the photon detector after filtering; Step 4-2-1 specifically includes: Step 4-2-1-1: Perform windowing on the voltage and current data of the photon detector after filtering; Step 4-2-1-2: Apply Fast Fourier Transform (FFT) to convert the time domain signals of the voltage data and current data of the filtered photon detector into frequency domain signals, thereby obtaining the frequency spectrum distribution of the voltage data and current data of the filtered photon detector; Step 4-2-2 specifically includes: Step 4-2-2-1: Determine the fundamental frequency and the frequencies of each harmonic based on the Fast Fourier Transform (FFT) calculation results; Step 4-2-2-2: Apply the Fourier series expansion method to calculate the amplitude and phase of each harmonic; Step 4-2-2-3: Get the harmonic content. The harmonic content is the ratio of the harmonic amplitude to the fundamental amplitude.

6. The quantum navigation positioning method according to claim 5, characterized in that: Fast Fourier Transform FFT includes: The voltage signal or current signal of the photon detector after filtering is defined as , the length is , after performing fast Fourier transform FFT, we get ; The formula for Fast Fourier Transform FFT is: ,in ; Harmonic amplitude ; Harmonic Phase ; Harmonic content: , is the fundamental amplitude; Step 4-3 specifically includes: Step 4-3-1: Perform zero-crossing detection on the voltage signal and current signal of the photon detector after filtering; Step 4-3-2: Calculate the phase difference between the voltage signal and the current signal of the photon detector after filtering. That is, calculate the angle value of the phase difference based on the zero-crossing time difference and the sampling period. Step 4-3-3: Calculate the power factor of the voltage signal and current signal of the photon detector after filtering. That is, calculate the power factor using the power factor formula based on the calculated phase difference. Step 4-3-1 specifically includes: Step 4-3-1-1: Detect the zero-crossing points of the voltage signal and current signal of the filtered photon detector respectively; Step 4-3-1-2: Record the timestamp of the zero-crossing point; Step 4-3-1-3: Calculate the difference between the timestamps of the zero-crossing points to obtain the zero-point time difference, which is a preliminary estimate of the phase difference; The algorithm formula for step 4-3 is: The timestamp of the zero-crossing point of the voltage signal of the photon detector after filtering is defined as , the timestamp of the current signal of the photon detector after filtering is , the sampling period is , then the phase difference for: ； Power Factor for: .

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