A logistics tracking query method based on Beidou

Abstract

The present invention discloses a Beidou-based logistics tracking and query method, which relates to the field of logistics tracking and query technology, and includes the following steps: obtaining multiple data information when a Beidou satellite positioning terminal performs logistics tracking and query, wherein the multiple data information includes the communication quality index between the Beidou satellite positioning terminal and the Beidou satellite system and the receiving signal characteristics of the satellite signal during the transmission and reception process, and after obtaining, analyzing and processing the communication quality index and the receiving signal characteristics. The present invention can detect the positioning anomaly of the Beidou satellite positioning terminal in real time by controlling the positioning accuracy of the Beidou satellite positioning terminal during logistics tracking and query. Once the anomaly occurs, the real-time monitoring system can issue an alarm in time to notify relevant staff, so that logistics companies can take measures quickly to avoid inaccurate location information causing loss, delay or damage of goods.

Description

Technical Field

[0001] The present invention relates to the technical field of logistics tracking and query, and in particular to a Beidou-based logistics tracking and query method. Background Art

[0002] Beidou-based logistics tracking and query refers to the use of the Beidou satellite navigation system to monitor and query the real-time location of goods in logistics transportation. The Beidou satellite system has the characteristics of global coverage, high precision, and high reliability, and can provide accurate location information. In the field of logistics, by integrating Beidou satellite technology, it is possible to track and query the real-time location, operating status and other information of goods during transportation, providing logistics companies with accurate management and monitoring methods, and improving transportation efficiency and service quality.

[0003] This Beidou-based logistics tracking and query system usually includes Beidou positioning equipment installed on transportation vehicles or goods and logistics management software for receiving, processing and displaying location information. Through this system, logistics companies can understand the location, route, transportation speed and other information of goods in real time, discover and solve potential transportation problems in advance, and better plan and optimize the logistics transportation process. The application of this technology not only improves the efficiency and visual management level of logistics transportation, but also provides more accurate information support for all links of the supply chain, promoting the development of the overall logistics industry.

[0004] Beidou satellite positioning terminal is a hardware device specially designed to obtain Beidou satellite navigation signals and calculate the location of the device. In Beidou-based logistics tracking and inquiry, the main function of Beidou satellite positioning terminal is to accurately calculate and locate the geographical coordinates of transportation tools or goods by receiving Beidou satellite signals. This is achieved through the built-in Beidou satellite navigation chip, which can analyze satellite signals and use triangulation and other technologies to ensure high accuracy and real-time location information.

[0005] Through the data transmission module, the Beidou satellite positioning terminal transmits the acquired location information to the logistics management center. This provides logistics companies with the ability to monitor and manage the transportation process in real time, enabling them to track the location, operating status and overall transportation progress of goods at any time. Such real-time information feedback helps logistics companies plan routes more effectively, predict arrival times, reduce risks in transportation, and improve overall transportation efficiency. Therefore, the Beidou satellite positioning terminal plays a key role in the Beidou-based logistics tracking system, providing the logistics industry with accurate and reliable location information, thereby optimizing the logistics management process.

[0006] The prior art has the following deficiencies:

[0007] When tracking and inquiring logistics through Beidou satellite positioning terminals, existing technologies are unable to promptly detect abnormalities in the positioning accuracy of Beidou satellite positioning terminals. When this happens, inaccurate location information may cause the goods to be lost or damaged during transportation, because it is difficult for logistics companies to accurately track the real-time location of the goods, which will cause economic losses and customer complaints, and reduce the reliability of logistics services. Secondly, erroneous positioning information may lead to incorrect transportation route planning, increasing transportation time and costs, which may lead to cargo delays, especially for time-sensitive goods such as fresh food or pharmaceuticals, the consequences are more serious.

[0008] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention

[0009] The purpose of the present invention is to provide a Beidou-based logistics tracking and query method, which introduces a real-time monitoring system, combines the communication quality index between the Beidou satellite positioning terminal and the Beidou satellite system and the receiving signal characteristics of the satellite signal, and comprehensively analyzes the packet delay change rate, signal-to-noise ratio and signal amplitude to generate a positioning anomaly index. The positioning accuracy of the Beidou satellite positioning terminal during logistics tracking and query is controlled in real time through the positioning anomaly index, and the positioning anomaly of the Beidou satellite positioning terminal can be discovered in real time. Once the anomaly occurs, the real-time monitoring system can issue an alarm in time to notify relevant staff, so that logistics companies can take measures quickly to avoid inaccurate location information causing loss, delay or damage of goods, so as to solve the problems in the above-mentioned background technology.

[0010] In order to achieve the above object, the present invention provides the following technical solution: a Beidou-based logistics tracking query method, comprising the following steps:

[0011] Acquire multiple data information when the Beidou satellite positioning terminal performs logistics tracking query, where multiple data information includes the communication quality index between the Beidou satellite positioning terminal and the Beidou satellite system and the receiving signal characteristics of the satellite signal during the transmission and reception process. After acquisition, analyze and process the communication quality index and the receiving signal characteristics;

[0012] Comprehensively analyze the processed communication quality indicators between the Beidou satellite positioning terminal and the Beidou satellite system and the received signal characteristics after processing during the transmission and reception of satellite signals to generate a positioning anomaly index;

[0013] Compare and analyze the positioning anomaly index generated by the Beidou satellite positioning terminal when querying logistics tracking with the pre-set positioning anomaly index reference threshold to determine whether there is an anomaly when the Beidou satellite positioning terminal queries logistics tracking;

[0014] When an abnormality occurs in the logistics tracking query process of the Beidou satellite positioning terminal, an analysis set is established based on several positioning abnormality indexes subsequently generated by the Beidou satellite positioning terminal for the logistics tracking query, and a comprehensive analysis is performed to grade the severity of the abnormality.

[0015] Preferably, the communication quality indicators between the Beidou satellite positioning terminal and the Beidou satellite system include packet delay change rate information and signal-to-noise ratio information. After acquisition, the packet delay change rate information and the signal-to-noise ratio information are processed respectively to generate a packet delay change rate variation coefficient and a signal-to-noise ratio depression coefficient; the receiving signal characteristics of the satellite signal during the transmission and reception process include signal amplitude information of the Beidou satellite positioning terminal receiving signal. After acquisition, the signal amplitude information is processed to generate a signal amplitude outlier coefficient.

[0016] Preferably, the logic for obtaining the packet delay change rate coefficient is as follows:

[0017] Obtain the actual packet delay change rate at different times during the T period when data is transmitted between the Beidou satellite positioning terminal and the Beidou satellite system, and calibrate the actual packet delay change rate as ζζ 封包 x , x represents the number of the actual packet delay change rate at different times during the T period when data is transmitted between the Beidou satellite positioning terminal and the Beidou satellite system, x=1, 2, 3, 4, ..., p, p is a positive integer;

[0018] The packet delay change rate discrete value is calculated by the actual packet delay change rate obtained during the T period when data is transmitted between the Beidou satellite positioning terminal and the Beidou satellite system, and the packet delay change rate discrete value is calibrated as ζζ 封包 离散 ,but: In the formula,

[0019] By packet delay variation rate discrete value ζζ 封包 离散 Calculate the packet delay change rate coefficient, the calculation expression is: In the formula, ζζ 封包 Indicates the coefficient of variation of packet delay rate.

[0020] Preferably, the logic for obtaining the signal-to-noise ratio depression coefficient is as follows:

[0021] Get the real-time signal-to-noise ratio in the T period when the Beidou satellite positioning terminal receives the satellite signal, and use the function λλ to convert the real-time signal-to-noise ratio into a time series 信噪比 (t) indicates;

[0022] The real-time signal-to-noise ratio obtained during the T period when the Beidou satellite positioning terminal receives the satellite signal is compared and analyzed with the signal-to-noise ratio reference value, and the signal-to-noise ratio depression coefficient is calculated. The calculation expression is: [t x , t y ] represents the period of time when the Beidou satellite positioning terminal receives satellite signals and is lower than the reference value of the signal-to-noise ratio within the T period, t x <t y ,λλ 信噪比 Represents the signal-to-noise ratio depression coefficient.

[0023] Preferably, the logic of obtaining the signal amplitude outlier coefficient is as follows:

[0024] Get the best signal amplitude range when the Beidou satellite positioning terminal receives satellite signals, and calibrate the best signal amplitude range as ΦΦ 幅度 min ~ΦΦ 幅度 max ;

[0025] Obtain several real-time signal amplitudes within the T period when the Beidou satellite positioning terminal receives satellite signals, and calibrate the real-time signal amplitude as ΦΦ 幅度 y , y represents the number of real-time signal amplitudes obtained within the T period when the Beidou satellite positioning terminal receives the satellite signal, y=1, 2, 3, 4, ..., q, q is a positive integer;

[0026] Calculate the signal amplitude outlier coefficient. The expression is: In the formula, ΦΦ 幅度 y′ Indicates the real-time signal amplitude that is not within the optimal signal amplitude range obtained within the T period when the Beidou satellite positioning terminal receives the satellite signal. y' indicates the number of the real-time signal amplitude that is not within the optimal signal amplitude range obtained within the T period when the Beidou satellite positioning terminal receives the satellite signal. y'=1, 2, 3, 4, ..., q', q' is a positive integer, ΦΦ 幅度 represents the signal amplitude outlier coefficient,

[0027] Preferably, the packet delay change rate coefficient ζζ generated after processing between the Beidou satellite positioning terminal and the Beidou satellite system 封包 , signal-to-noise ratio depression coefficient λ 信噪比 And the signal amplitude outlier coefficient ΦΦ generated after the satellite signal is processed during transmission and reception 幅度 Perform comprehensive analysis to generate the positioning anomaly index Ω 定位 , based on the formula:

[0028]

[0029] , where r 1 、r 2 、r 3 They are the packet delay change rate coefficient ζζ 封包 , signal-to-noise ratio depression coefficient λ 信噪比 and the signal amplitude outlier coefficient ΦΦ 幅度 The preset proportionality factor, and r 1 、r 2 、r 3 Both are greater than 0.

[0030] Preferably, the positioning anomaly index generated by the Beidou satellite positioning terminal during logistics tracking query is compared with a preset positioning anomaly index reference threshold value for mutual analysis, and the result of the comparison analysis is as follows:

[0031] If the positioning abnormality index is greater than or equal to the positioning abnormality index reference threshold, an abnormal signal is generated, and an abnormal prompt is issued for the abnormal signal to inform relevant staff;

[0032] If the positioning anomaly index is less than the positioning anomaly index reference threshold, a normal signal is generated, no prompt is issued for the normal signal, and the logistics continues to be tracked and queried through the Beidou satellite positioning terminal.

[0033] Preferably, when the Beidou satellite positioning terminal generates an abnormal signal in the logistics tracking query process, a plurality of positioning abnormality indexes subsequently generated by the Beidou satellite positioning terminal for the logistics tracking query are used to establish an analysis set, and the analysis set is calibrated as L, then L = {Ω 定位 k}={Ω 定位 1 ,Ω 定位 2 ,Ω 定位 3 ,…,Ω 定位 Q}, Q is a positive integer;

[0034] The positioning anomaly indexes in the analysis set are compared with the positioning anomaly index reference thresholds respectively, and the positioning anomaly index greater than or equal to the positioning anomaly index reference threshold is calibrated as Ω 定位 u , u represents the number of the positioning anomaly index greater than or equal to the positioning anomaly index reference threshold in the analysis set, u = 1, 2, 3, 4, ..., s, s is a positive integer;

[0035] Calculate the severity index of the Beidou satellite positioning terminal for logistics tracking query, and mark the severity index as F x ,but: In the formula, Ω定位 参考 Indicates the reference threshold of the positioning anomaly index.

[0036] Preferably, the severity index F generated in the data set is x Compare with the preset gradient reference thresholds P1 and P2, where P1 is less than P2, and generate the following situation:

[0037] If the severity index F x If it is greater than or equal to P2, a high-risk level signal is generated, and a high-risk warning prompt is issued for the high-risk level signal;

[0038] If the severity index F x If it is greater than or equal to P1 and less than P2, a medium risk level signal is generated and a medium risk warning is issued for the medium risk level signal;

[0039] If the severity index F x If it is less than P1, a low risk level signal is generated and no early warning is issued for the low risk level signal.

[0040] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0041] The present invention introduces a real-time monitoring system, combines the communication quality index between the Beidou satellite positioning terminal and the Beidou satellite system and the receiving signal characteristics of the satellite signal, comprehensively analyzes the packet delay change rate, the signal-to-noise ratio and the signal amplitude to generate a positioning anomaly index, and controls the positioning accuracy of the Beidou satellite positioning terminal in real time when performing logistics tracking and query through the positioning anomaly index, and can detect the positioning anomaly of the Beidou satellite positioning terminal in real time. Once an anomaly occurs, the real-time monitoring system can issue an alarm in time to notify relevant staff, so that logistics companies can take measures quickly to avoid the loss, delay or damage of goods caused by inaccurate location information;

[0042] The present invention establishes an analysis set of severity indexes, conducts a comprehensive assessment of the operating status of the Beidou satellite positioning terminal, introduces a gradient reference threshold, and can classify abnormal situations. The severity of the abnormality can be learned from high, medium and low risk level signals. This graded early warning system enables logistics companies to carry out maintenance management in a targeted manner, providing emergency maintenance for high risk levels, regular maintenance for medium risk levels, and monitoring low risk level abnormal situations without emergency processing, thereby reducing unnecessary operational burdens. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0044] Figure 1 The present invention is a method flow chart of a Beidou-based logistics tracking and query method. DETAILED DESCRIPTION

[0045] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of the present disclosure will be more comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art.

[0046] The present invention provides Figure 1 A Beidou-based logistics tracking query method is shown, comprising the following steps:

[0047] Acquire multiple data information when the Beidou satellite positioning terminal performs logistics tracking query, where multiple data information includes the communication quality index between the Beidou satellite positioning terminal and the Beidou satellite system and the receiving signal characteristics of the satellite signal during the transmission and reception process. After acquisition, analyze and process the communication quality index and the receiving signal characteristics;

[0048] The communication quality indicators between the Beidou satellite positioning terminal and the Beidou satellite system include packet delay change rate information and signal-to-noise ratio information. After acquisition, the packet delay change rate information and signal-to-noise ratio information are processed respectively to generate packet delay change rate variation coefficient and signal-to-noise ratio depression coefficient;

[0049] The packet delay change rate refers to the rate of change of the time delay between the sending and receiving of data packets during data transmission between the Beidou satellite positioning terminal and the Beidou satellite system in Beidou-based logistics tracking queries. This parameter reflects the real-time nature of data transmission. Abnormal fluctuations in the packet delay change rate may indicate a change in the data transmission rate, which may affect the logistics tracking system's acquisition and processing of real-time location information.

[0050] The signal-to-noise ratio is a parameter that describes the relationship between the satellite signal received by the Beidou satellite positioning terminal and the background noise. In logistics tracking queries, a high signal-to-noise ratio usually means a clear and stable satellite signal, which helps to accurately analyze and locate. A low signal-to-noise ratio may cause signal distortion or interference, affecting the Beidou satellite positioning terminal's accurate acquisition of location information. Therefore, maintaining an appropriate signal-to-noise ratio level is an important factor in ensuring the reliable operation of the logistics tracking system.

[0051] When tracking and querying logistics through Beidou satellite positioning terminals, the large fluctuations in the packet delay change rate may cause many problems in Beidou-based logistics tracking, thereby affecting the positioning accuracy of Beidou satellite positioning terminals, increasing the risk of problems during transportation of goods, and possibly causing delays in goods. The following is a detailed explanation:

[0052] Real-time performance is impaired: The large fluctuation of packet delay change rate directly affects the timeliness of data transmission. If the packet delay is unstable, the logistics tracking system cannot obtain the real-time location information of the goods in time, resulting in delayed monitoring of the goods transportation status, which may cause goods delays.

[0053] Decreased positioning accuracy: Changes in packet delay will interfere with the Beidou satellite positioning terminal's acquisition of satellite signal timestamps, which in turn affects positioning accuracy. Decreased positioning accuracy may lead to erroneous location information and increase uncertainty in cargo transportation route planning.

[0054] Incorrect route planning: Abnormal positioning accuracy will affect the system's accurate calculation of the transportation route, especially when the packet delay fluctuates greatly, which may cause the system to incorrectly plan the transportation route, increase the distance and time of cargo transportation, and thus cause cargo delays.

[0055] Increased risk of cargo loss and damage: Abnormal positioning accuracy may lead to inaccurate monitoring of the real-time status of cargo, increasing the risk of cargo loss or damage during transportation. Cargo loss and damage may result in additional costs and decreased customer satisfaction.

[0056] The logic for obtaining the packet delay change rate coefficient is as follows:

[0057] Obtain the actual packet delay change rate at different times during the T period when data is transmitted between the Beidou satellite positioning terminal and the Beidou satellite system, and calibrate the actual packet delay change rate as ζζ 封包 x , x represents the number of the actual packet delay change rate at different times during the T period when data is transmitted between the Beidou satellite positioning terminal and the Beidou satellite system, x=1, 2, 3, 4, ..., p, p is a positive integer;

[0058] It should be noted that network diagnostic tools, such as the ping command, can be used to measure the round-trip delay of data transmission at different times. By continuously executing the ping command, the delay information of the packet can be obtained in real time, thereby calculating the packet delay change rate;

[0059] The packet delay change rate discrete value is calculated by the actual packet delay change rate obtained during the T period when data is transmitted between the Beidou satellite positioning terminal and the Beidou satellite system, and the packet delay change rate discrete value is calibrated as ζζ 封包 离散 ,but: In the formula,

[0060] By packet delay variation rate discrete value ζζ 封包 离散 Calculate the packet delay change rate coefficient, the calculation expression is: In the formula, ζζ 封包 Indicates the coefficient of variation of packet delay rate.

[0061] From the calculation expression of the packet delay change rate coefficient, it can be seen that the larger the performance value of the packet delay change rate coefficient generated within the T period when data is transmitted between the Beidou satellite positioning terminal and the Beidou satellite system, the greater the risk of abnormal positioning accuracy of the Beidou satellite positioning terminal. Conversely, the smaller the risk of abnormal positioning accuracy of the Beidou satellite positioning terminal.

[0062] When tracking and querying logistics through Beidou satellite positioning terminals, the signal-to-noise ratio when the Beidou satellite positioning terminal receives satellite signals is relatively low, which may have many impacts on the Beidou-based logistics tracking system, thereby increasing the risks in the cargo transportation process and may cause cargo delays. The following is a detailed explanation:

[0063] Decreased positioning accuracy: A low signal-to-noise ratio usually indicates that the received satellite signal is relatively weak and susceptible to interference or distortion. This may cause the Beidou satellite positioning terminal to erroneously analyze the satellite signal during the positioning process, thus affecting the accuracy of positioning and causing a decrease in positioning accuracy.

[0064] Inaccurate location information: Under low signal-to-noise ratio conditions, the weakness of satellite signals may cause the Beidou satellite positioning terminal to be unable to accurately distinguish between valid signals and noise. This may lead to inaccurate interpretation of the location information provided by the logistics tracking system and increase the uncertainty of cargo transportation route planning.

[0065] Increased risk of signal loss: When the signal-to-noise ratio is low, the satellite signal is easily masked by interference in the environment, resulting in the receiver being unable to properly interpret the signal. This increases the risk of losing the satellite signal and may cause the Beidou satellite positioning terminal to lose its lock on the satellite, making it unable to provide accurate location information.

[0066] Mis-navigation and incorrect routing: Due to the low signal-to-noise ratio that may lead to insufficient positioning accuracy, the logistics tracking system may misunderstand the actual location of the goods, resulting in incorrect transportation route planning. This may extend the transportation time of the goods, increase costs, and even cause delays.

[0067] The logic for obtaining the signal-to-noise ratio depression coefficient is as follows:

[0068] Get the real-time signal-to-noise ratio in the T period when the Beidou satellite positioning terminal receives the satellite signal, and use the function λλ to convert the real-time signal-to-noise ratio into a time series 信噪比 (t) indicates;

[0069] It should be noted that professional satellite signal monitoring tools, such as satellite signal analyzers or satellite signal testers, can directly measure and display the signal-to-noise ratio of satellite signals. These tools usually provide more detailed and accurate signal quality information and are suitable for high-precision monitoring and analysis needs.

[0070] The real-time signal-to-noise ratio obtained during the T period when the Beidou satellite positioning terminal receives the satellite signal is compared and analyzed with the signal-to-noise ratio reference value, and the signal-to-noise ratio depression coefficient is calculated. The calculation expression is: [t x , t y ] represents the period of time when the Beidou satellite positioning terminal receives satellite signals and is lower than the reference value of the signal-to-noise ratio within the T period, t x <t y ,λλ 信噪比 It indicates the signal-to-noise ratio depression coefficient;

[0071] It should be noted that manufacturers of Beidou satellite positioning terminals usually provide detailed equipment documents and specification sheets, which contain the performance parameters of the equipment, including reference values ​​of the signal-to-noise ratio. Relevant information can be found in these documents;

[0072] From the calculation expression of the signal-to-noise ratio depression coefficient, it can be seen that the larger the performance value of the signal-to-noise ratio depression coefficient generated within the T period when the Beidou satellite positioning terminal receives the satellite signal, the greater the hidden danger of abnormal positioning accuracy of the Beidou satellite positioning terminal. Conversely, the smaller the hidden danger of abnormal positioning accuracy of the Beidou satellite positioning terminal.

[0073] The receiving signal characteristics of the satellite signal during the transmission and reception process include the signal amplitude information of the Beidou satellite positioning terminal receiving the signal. After acquisition, the signal amplitude information is processed to generate the signal amplitude outlier coefficient.

[0074] When conducting logistics tracking inquiries based on Beidou satellite positioning terminals, the signal amplitude of the satellite signal during transmission and reception indicates the strength of the satellite signal, which is usually measured in decibels (dB), reflecting the strength of the signal. For Beidou satellite positioning terminals, this is the relative strength of the satellite signal perceived by the receiving end. In logistics tracking, by monitoring the amplitude of the satellite signal, the communication quality between the device and the satellite can be evaluated, thereby judging the accuracy and real-time nature of the location information. The stability of the signal amplitude indicates that the communication connection between the device and the satellite is good, which helps to ensure the timely update and accurate transmission of logistics information, and provide reliable location data support for logistics management. Therefore, monitoring the signal amplitude plays an important role in the logistics tracking query process, and provides key technical support for achieving accurate location tracking and information query.

[0075] When tracking and inquiring about logistics through Beidou satellite positioning terminals, the signal amplitude received by the Beidou satellite positioning terminals is too large or too small, which may cause a series of problems, thus affecting the normal operation of the logistics tracking system and may cause cargo delays. The following is a detailed explanation:

[0076] Too large signal amplitude: If the satellite signal amplitude is too large, it may cause overload or saturation at the receiving end, affecting the accuracy of signal analysis. This may cause the Beidou satellite positioning terminal to be unable to correctly analyze the satellite signal, resulting in reduced positioning accuracy, which may lead to incorrect cargo location information, and further lead to incorrect transportation route planning and possible cargo delays.

[0077] Too small signal amplitude: A signal amplitude that is too small may indicate insufficient signal strength and is easily affected by environmental noise and interference. This will cause the Beidou satellite positioning terminal to be unable to stably receive satellite signals, thus affecting the accuracy of positioning. In extreme cases, it may lead to the loss of satellite signals, unable to provide valid location information, and increase the risk of cargo loss and route planning errors.

[0078] Positioning error: Abnormal signal amplitude may increase the error when the Beidou satellite positioning terminal calculates the position, resulting in a significant difference between the actual position and the position reported by the system. This may lead to incorrect transportation route planning and increase the possibility of damage or delay of goods during transportation.

[0079] Reduced system stability: Abnormal fluctuations in signal amplitude may cause reduced system stability of Beidou satellite positioning terminals. System instability may cause equipment failure, positioning interruption and other problems, which in turn affect the real-time and accuracy of logistics tracking and increase the risk of cargo delays.

[0080] Increased costs: Since signal anomalies may lead to inaccurate positioning, the system needs to go through additional corrections and adjustments to ensure accurate logistics information. This may lead to increased maintenance costs, and due to incorrect transportation route planning, transportation time is extended, increasing transportation costs.

[0081] The logic of obtaining the signal amplitude outlier coefficient is as follows:

[0082] Get the best signal amplitude range when the Beidou satellite positioning terminal receives satellite signals, and calibrate the best signal amplitude range as ΦΦ 幅度 min ~ΦΦ 幅度 max ;

[0083] It should be noted that manufacturers usually provide information about signal quality, including the optimal signal amplitude range, in the device's user manual, technical specification sheet, or other relevant documents. You can carefully consult the device documentation to obtain this key information.

[0084] Obtain several real-time signal amplitudes within the T period when the Beidou satellite positioning terminal receives satellite signals, and calibrate the real-time signal amplitude as ΦΦ 幅度 y , y represents the number of real-time signal amplitudes obtained within the T period when the Beidou satellite positioning terminal receives the satellite signal, y=1, 2, 3, 4, ..., q, q is a positive integer;

[0085] It should be noted that the use of professional satellite signal monitoring instruments is a common way to obtain real-time signal amplitude. These instruments are usually equipped with highly sensitive antennas and signal receivers, which can monitor and display the strength of received satellite signals in real time;

[0086] Calculate the signal amplitude outlier coefficient. The expression is: In the formula, ΦΦ 幅度 y′ Indicates the real-time signal amplitude that is not within the optimal signal amplitude range obtained within the T period when the Beidou satellite positioning terminal receives the satellite signal. y' indicates the number of the real-time signal amplitude that is not within the optimal signal amplitude range obtained within the T period when the Beidou satellite positioning terminal receives the satellite signal. y'=1, 2, 3, 4, ..., q', q' is a positive integer, ΦΦ 幅度 represents the signal amplitude outlier coefficient,

[0087] From the calculation expression of the signal amplitude outlier coefficient, it can be seen that the larger the performance value of the signal amplitude outlier coefficient generated within the T period when the Beidou satellite positioning terminal receives the satellite signal, the greater the hidden danger of abnormal positioning accuracy of the Beidou satellite positioning terminal. Conversely, the smaller the hidden danger of abnormal positioning accuracy of the Beidou satellite positioning terminal.

[0088] Comprehensively analyze the processed communication quality indicators between the Beidou satellite positioning terminal and the Beidou satellite system and the received signal characteristics after processing during the transmission and reception of satellite signals to generate a positioning anomaly index;

[0089] The packet delay change rate coefficient ζζ generated after processing between the Beidou satellite positioning terminal and the Beidou satellite system 封包 , signal-to-noise ratio depression coefficient λ 信噪比 And the signal amplitude outlier coefficient ΦΦ generated after the satellite signal is processed during transmission and reception 幅度 Perform comprehensive analysis to generate the positioning anomaly index Ω 定位 , based on the formula:

[0090]

[0091] , where r 1 、r 2 、r 3 They are the packet delay change rate coefficient ζζ 封包 , signal-to-noise ratio depression coefficient λ 信噪比 and the signal amplitude outlier coefficient ΦΦ 幅度 The preset proportionality factor, and r 1 、r 2 、r 3 All are greater than 0;

[0092] It can be seen from the calculation formula that the larger the packet delay change rate coefficient, the larger the signal-to-noise ratio depression coefficient, and the larger the signal amplitude outlier coefficient generated by the Beidou satellite positioning terminal in the T period when the logistics tracking query is performed, the greater the positioning anomaly index Ω generated by the Beidou satellite positioning terminal in the T period when the logistics tracking query is performed. 定位 The larger the performance value, the greater the risk of abnormal positioning accuracy of the Beidou satellite positioning terminal. Conversely, the smaller the risk of abnormal positioning accuracy of the Beidou satellite positioning terminal.

[0093] Compare and analyze the positioning anomaly index generated by the Beidou satellite positioning terminal when querying logistics tracking with the pre-set positioning anomaly index reference threshold to determine whether there is an anomaly when the Beidou satellite positioning terminal queries logistics tracking;

[0094] The positioning anomaly index generated by the Beidou satellite positioning terminal during logistics tracking query is compared with the pre-set positioning anomaly index reference threshold. The results of the comparison analysis are as follows:

[0095] If the positioning anomaly index is greater than or equal to the positioning anomaly index reference threshold, an abnormal signal is generated, and an abnormal prompt is issued for the abnormal signal to inform relevant staff. When the Beidou satellite positioning terminal generates an abnormal signal for logistics tracking query, it indicates that the positioning accuracy of the Beidou satellite positioning terminal for logistics tracking query is abnormal, and timely maintenance is required to ensure that the Beidou satellite positioning terminal can track and query logistics efficiently;

[0096] If the positioning anomaly index is less than the positioning anomaly index reference threshold, a normal signal is generated, no prompt is issued for the normal signal, and the logistics continues to be tracked and queried through the Beidou satellite positioning terminal. When the Beidou satellite positioning terminal generates a normal signal for logistics tracking and query, it indicates that the Beidou satellite positioning terminal can efficiently track and query the logistics.

[0097] When there is an abnormality in the logistics tracking query process of the Beidou satellite positioning terminal, a number of positioning abnormality indexes subsequently generated by the Beidou satellite positioning terminal for the logistics tracking query are established into an analysis set for comprehensive analysis, and the severity of the abnormality is graded;

[0098] When the Beidou satellite positioning terminal generates an abnormal signal during the logistics tracking query process, a number of positioning abnormality indexes subsequently generated by the Beidou satellite positioning terminal for the logistics tracking query are established as an analysis set, and the analysis set is calibrated as L, then L = {Ω 定位 k}={Ω 定位 1 ,Ω 定位 2 ,Ω 定位 3 ,…,Ω 定位 Q}, Q is a positive integer;

[0099] The positioning anomaly indexes in the analysis set are compared with the positioning anomaly index reference thresholds respectively, and the positioning anomaly index greater than or equal to the positioning anomaly index reference threshold is calibrated as Ω 定位 u , u represents the number of the positioning anomaly index greater than or equal to the positioning anomaly index reference threshold in the analysis set, u = 1, 2, 3, 4, ..., s, s is a positive integer;

[0100] Calculate the severity index of the Beidou satellite positioning terminal for logistics tracking query, and mark the severity index as F x ,but: In the formula, Ω 定位参考 Indicates the reference threshold of the positioning anomaly index;

[0101] From the calculation formula of the severity index generated in the analysis set, it can be seen that the greater the performance value of the risk level generated in the analysis set, the more serious the positioning accuracy anomaly of the Beidou satellite positioning terminal in the logistics tracking query process is, and vice versa, the less serious the positioning accuracy anomaly of the Beidou satellite positioning terminal in the logistics tracking query process is;

[0102] The severity index F generated in the data set x Compare with the preset gradient reference thresholds P1 and P2, where P1 is less than P2, and generate the following situation:

[0103] If the severity index F x If it is greater than or equal to P2, a high-risk level signal is generated, and a high-risk warning prompt is issued for the high-risk level signal. When the Beidou satellite positioning terminal generates a high-risk level signal for the logistics tracking query process, it indicates that the Beidou satellite positioning terminal has a continuous and serious positioning accuracy anomaly in the logistics tracking query process, and the Beidou satellite positioning terminal needs to be maintained and managed in time;

[0104] If the severity index F x If it is greater than or equal to P1 and less than P2, a medium risk level signal is generated, and a medium risk warning prompt is issued for the medium risk level signal. When the Beidou satellite positioning terminal generates a medium risk level signal for the logistics tracking query process, it indicates that the Beidou satellite positioning terminal has unstable positioning accuracy during the logistics tracking query process, and the Beidou satellite positioning terminal needs to be maintained and managed in time;

[0105] If the severity index F x If it is less than P1, a low-risk level signal is generated, and no early warning is issued for the low-risk level signal. When the Beidou satellite positioning terminal generates a low-risk level signal for the logistics tracking query process, it indicates that the Beidou satellite positioning terminal may have only experienced sudden positioning accuracy abnormalities in the logistics tracking query process, and no early warning is required in this case.

[0106] The present invention introduces a real-time monitoring system, combines the communication quality index between the Beidou satellite positioning terminal and the Beidou satellite system and the receiving signal characteristics of the satellite signal, comprehensively analyzes the packet delay change rate, the signal-to-noise ratio and the signal amplitude to generate a positioning anomaly index, and controls the positioning accuracy of the Beidou satellite positioning terminal in real time when performing logistics tracking and query through the positioning anomaly index, and can detect the positioning anomaly of the Beidou satellite positioning terminal in real time. Once an anomaly occurs, the real-time monitoring system can issue an alarm in time to notify relevant staff, so that logistics companies can take measures quickly to avoid the loss, delay or damage of goods caused by inaccurate location information;

[0107] The present invention establishes an analysis set of severity indexes, conducts a comprehensive assessment of the operating status of the Beidou satellite positioning terminal, introduces a gradient reference threshold, and can classify abnormal situations. The severity of the abnormality can be learned from high, medium and low risk level signals. This graded early warning system enables logistics companies to carry out maintenance management in a targeted manner, providing emergency maintenance for high risk levels, regular maintenance for medium risk levels, and monitoring low risk level abnormal situations without emergency processing, thereby reducing unnecessary operational burdens.

[0108] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0109] The above embodiments can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

[0110] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0111] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0112] In the several embodiments provided in the present application, it should be understood that the disclosed systems and methods can be implemented in other ways. For example, the embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0113] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0114] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0115] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A Beidou-based logistics tracking and query method, characterized in that: The following steps are involved: Acquire multiple data information when the Beidou satellite positioning terminal performs logistics tracking query, where multiple data information includes the communication quality index between the Beidou satellite positioning terminal and the Beidou satellite system and the receiving signal characteristics of the satellite signal during the transmission and reception process. After acquisition, analyze and process the communication quality index and the receiving signal characteristics; Comprehensively analyze the processed communication quality indicators between the Beidou satellite positioning terminal and the Beidou satellite system and the received signal characteristics after processing during the transmission and reception of satellite signals to generate a positioning anomaly index; Compare and analyze the positioning anomaly index generated by the Beidou satellite positioning terminal when querying logistics tracking with the pre-set positioning anomaly index reference threshold to determine whether there is an anomaly when the Beidou satellite positioning terminal queries logistics tracking; When there is an abnormality in the logistics tracking query process of the Beidou satellite positioning terminal, a number of positioning abnormality indexes subsequently generated by the Beidou satellite positioning terminal for the logistics tracking query are established into an analysis set for comprehensive analysis, and the severity of the abnormality is graded; The communication quality indicators between the Beidou satellite positioning terminal and the Beidou satellite system include packet delay change rate information and signal-to-noise ratio information. After acquisition, the packet delay change rate information and the signal-to-noise ratio information are processed respectively to generate a packet delay change rate variation coefficient and a signal-to-noise ratio depression coefficient; the receiving signal characteristics of the satellite signal during the transmission and reception process include the signal amplitude information of the Beidou satellite positioning terminal receiving signal. After acquisition, the signal amplitude information is processed to generate a signal amplitude outlier coefficient; The logic for obtaining the packet delay change rate coefficient is as follows: Obtain the actual packet delay change rate at different times during the T period when data is transmitted between the Beidou satellite positioning terminal and the Beidou satellite system, and calibrate the actual packet delay change rate as ζζ 封包 x , x represents the number of the actual packet delay change rate at different times during the T period when data is transmitted between the Beidou satellite positioning terminal and the Beidou satellite system, x=1, 2, 3, 4, ..., p, p is a positive integer; The packet delay change rate discrete value is calculated by the actual packet delay change rate obtained during the T period when data is transmitted between the Beidou satellite positioning terminal and the Beidou satellite system, and the packet delay change rate discrete value is calibrated as ζζ 封包 离散 ,but: In the formula, By packet delay variation rate discrete value ζζ 封包 离散 Calculate the packet delay change rate coefficient, the calculation expression is: In the formula, ζζ 封包 Indicates the coefficient of variation of packet delay rate; The logic for obtaining the signal-to-noise ratio depression coefficient is as follows: Get the real-time signal-to-noise ratio in the T period when the Beidou satellite positioning terminal receives the satellite signal, and use the function λλ to convert the real-time signal-to-noise ratio into a time series 信噪比 (t) indicates; The real-time signal-to-noise ratio obtained during the T period when the Beidou satellite positioning terminal receives the satellite signal is compared and analyzed with the signal-to-noise ratio reference value, and the signal-to-noise ratio depression coefficient is calculated. The calculation expression is: [t x , t y ] represents the period of time when the Beidou satellite positioning terminal receives satellite signals and is lower than the reference value of the signal-to-noise ratio within the T period, t x <t y ,λλ 信噪比 It indicates the signal-to-noise ratio depression coefficient; The logic of obtaining the signal amplitude outlier coefficient is as follows: Get the best signal amplitude range when the Beidou satellite positioning terminal receives satellite signals, and calibrate the best signal amplitude range as ΦΦ 幅度 min ~ΦΦ 幅度 max ; Obtain several real-time signal amplitudes within the T period when the Beidou satellite positioning terminal receives satellite signals, and calibrate the real-time signal amplitude as ΦΦ 幅度 y , y represents the number of real-time signal amplitudes obtained within the T period when the Beidou satellite positioning terminal receives the satellite signal, y=1, 2, 3, 4, ..., q, q is a positive integer; Calculate the signal amplitude outlier coefficient. The expression is: In the formula, ΦΦ 幅度 y′ Indicates the real-time signal amplitude that is not within the optimal signal amplitude range obtained within the T period when the Beidou satellite positioning terminal receives the satellite signal. y' indicates the number of the real-time signal amplitude that is not within the optimal signal amplitude range obtained within the T period when the Beidou satellite positioning terminal receives the satellite signal. y'=1, 2, 3, 4, ..., q', q' is a positive integer, ΦΦ 幅度 represents the signal amplitude outlier coefficient, The packet delay change rate coefficient ζζ generated after processing between the Beidou satellite positioning terminal and the Beidou satellite system 封包 , signal-to-noise ratio depression coefficient λλ 信噪比 And the signal amplitude outlier coefficient φφ generated after the satellite signal is processed during transmission and reception 幅度 Perform comprehensive analysis to generate the positioning anomaly index Ω 定位 , based on the formula: ， Where r1, r2, and r3 are the packet delay change rate coefficients ζζ 封包 , signal-to-noise ratio depression coefficient λ 信噪比 and the signal amplitude outlier coefficient ΦΦ 幅度 The preset proportional coefficient, and r1, r2, and r3 are all greater than 0.

2. According to a Beidou-based logistics tracking and query method according to claim 1, it is characterized in that: The positioning anomaly index generated by the Beidou satellite positioning terminal during logistics tracking query is compared with the pre-set positioning anomaly index reference threshold. The results of the comparison analysis are as follows: If the positioning abnormality index is greater than or equal to the positioning abnormality index reference threshold, an abnormal signal is generated, and an abnormal prompt is issued for the abnormal signal to inform relevant staff; If the positioning anomaly index is less than the positioning anomaly index reference threshold, a normal signal is generated, no prompt is issued for the normal signal, and the logistics continues to be tracked and queried through the Beidou satellite positioning terminal.

3. According to a Beidou-based logistics tracking and query method according to claim 2, it is characterized in that: When the Beidou satellite positioning terminal generates an abnormal signal during the logistics tracking query process, a number of positioning abnormality indexes subsequently generated by the Beidou satellite positioning terminal for the logistics tracking query are established as an analysis set, and the analysis set is calibrated as L, then L = {Ω 定位 k }={Ω 定位 1.Ω 定位 2.Ω 定位 3. ..., Ω 定位 Q }, Q is a positive integer; The positioning anomaly indexes in the analysis set are compared with the positioning anomaly index reference thresholds respectively, and the positioning anomaly index greater than or equal to the positioning anomaly index reference threshold is calibrated as Ω 定位 u , u represents the number of the positioning anomaly index greater than or equal to the positioning anomaly index reference threshold in the analysis set, u = 1, 2, 3, 4, ..., s, s is a positive integer; Calculate the severity index of the Beidou satellite positioning terminal for logistics tracking query, and mark the severity index as F x ,but: In the formula, Ω 定位 参考 Indicates the reference threshold of the positioning anomaly index.

4. A Beidou-based logistics tracking and query method according to claim 3, characterized in that: The severity index F generated in the data set x Compare with the preset gradient reference thresholds P1 and P2, where P1 is less than P2, and generate the following situation: If the severity index F x If it is greater than or equal to P2, a high-risk level signal is generated, and a high-risk warning prompt is issued for the high-risk level signal; If the severity index F x If it is greater than or equal to P1 and less than P2, a medium risk level signal is generated and a medium risk warning is issued for the medium risk level signal; If the severity index F x If it is less than P1, a low risk level signal is generated and no early warning is issued for the low risk level signal.

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