Vehicle transportation management method and system

Abstract

The invention discloses a vehicle transportation management method and system. The method comprises the following steps that S1, background electromagnetic pulses of a current area are collected through a vehicle-mounted terminal; a background electromagnetic environment of a strong electromagnetic pulse interference area is used as a communication channel, that is, the interference environment itself is used as the communication channel, and an artificially modulated pulse interval mode is associated with statistical characteristics of background pulses by establishing a pulse interval characteristic baseline. The length of the long interval and the length of the short interval are integral multiples of an interval value corresponding to a probability density function peak value in the pulse interval characteristic baseline, so that the instruction signal can be fused into an environment background to avoid interference and can be identified through law difference. Compared with the problem that a traditional communication mode is completely invalid under strong interference, the method realizes transmission of the emergency instruction under the strong electromagnetic pulse interference environment, so that a communication command vehicle can still be established under the conditions of strong electromagnetic pulse interference and communication link interruption.

Description

Technical Field

[0001] This invention relates to the field of vehicle transportation management technology, and in particular to a vehicle transportation management method and system. Background Technology

[0002] In the current vehicle transportation management system, the interaction between the dispatch center and the vehicle-mounted terminal mainly relies on conventional wireless communication technologies, including but not limited to 4G / 5G cellular communication, satellite communication, and short-range radio communication. These communication methods can achieve stable data transmission under normal electromagnetic conditions, supporting real-time interaction of conventional multi-byte commands such as route adjustments, cargo status inquiries, and speed limit notifications. They can also support real-time interaction of basic single-byte emergency commands such as emergency stops, acceleration for hazard avoidance, and direction corrections. This is the core technological support for ensuring vehicle transportation efficiency and driving safety.

[0003] When vehicles travel into areas of strong electromagnetic pulse (EMI), existing communication technologies face the technical bottleneck of complete link disruption. On the one hand, some technologies attempt to combat interference by increasing the transmission power of communication equipment and enhancing the sensitivity of the receiver. However, in EMI environments, the intensity of interference signals often far exceeds the effective power of conventional communication signals. Even with increased transmission power, the signal will still be interfered with, making effective demodulation impossible. On the other hand, while existing anti-interference communication modules, such as frequency-hopping and spread-spectrum communication modules, can maintain communication in weak interference environments, they rely on preset frequency band resources and communication protocols. In scenarios of full-band interference caused by strong EMI, their anti-interference capabilities completely fail. Strong EMI interference originates from the instantaneous high-current radiation of high-power electrical equipment such as high-voltage electric arc furnaces, high-frequency electromagnetic radiation from large broadcast antenna transmitters, or sudden electromagnetic events. Its characteristics include high interference signal intensity and wide spectrum coverage, which can directly overwhelm the effective frequency band of conventional communication signals, causing the signal transmission link between the dispatch center and the vehicle to completely fail. Specifically, the vehicle cannot receive any instructions sent by the dispatch center, resulting in communication interruption and inability to command vehicles in areas of strong EMI. Summary of the Invention

[0004] To alleviate the technical problem in the background art where the vehicle-mounted terminal cannot receive any instructions sent by the dispatch center when strong electromagnetic pulse interference is present, the present invention proposes a vehicle transportation management method and system.

[0005] The present invention proposes a vehicle transportation management method, comprising the following steps: S1. Collect background electromagnetic pulses in the current area via the vehicle-mounted terminal; S2. Based on the background electromagnetic pulse, generate a pulse interval characteristic baseline at the dispatch center; S3. Obtain the instruction library, construct a mapping mechanism, extract emergency instructions from the instruction library to form an emergency instruction set, and assign a unique pulse interval mode to each emergency instruction in the emergency instruction set. S4. When the vehicle-mounted terminal is in a strong electromagnetic pulse interference area and the communication link is interrupted, the first instruction set to be transmitted in the dispatch center is obtained; the first instruction set to be transmitted obtains the emergency instruction set to be transmitted through the mapping mechanism; the emergency instruction set to be transmitted obtains the corresponding pulse interval mode through the mapping mechanism; the dispatch center generates an electromagnetic pulse signal that matches the pulse interval mode by controlling the closing and opening of the switch of its associated high-power load, and transmits the electromagnetic pulse signal to the strong electromagnetic pulse interference area where the vehicle-mounted terminal is located. S5. The vehicle-mounted terminal continuously collects electromagnetic pulse signals from areas with strong electromagnetic pulse interference to form a real-time pulse interval sequence; it then matches the real-time pulse interval sequence with the pulse interval pattern in the mapping mechanism; if the match is successful, it generates an emergency command corresponding to the pulse interval pattern.

[0006] Preferably, in S1, the background electromagnetic pulse of the current area is collected by the vehicle-mounted terminal, as follows: Within a preset time period, the background electromagnetic pulse of the current area is collected by the wideband electromagnetic pulse sensor on the vehicle. Wideband electromagnetic pulse sensors include ultra-wideband antennas and magnetic ring sensors; If no background electromagnetic pulse is detected within a unit of time, it is determined that there is no usable background pulse in the current area; the method of this application will not be started within the preset time period, and the broadband electromagnetic pulse sensor will be restarted to collect the background electromagnetic pulse of the current area when the next time period arrives. If background electromagnetic pulses are detected within a unit of time, mark the arrival time of each background electromagnetic pulse; The background electromagnetic pulse and its arrival time are transmitted to the dispatch center. The vehicle-mounted terminal can transmit the background electromagnetic pulse and its arrival time to the dispatch center via existing communication links such as 4G or 5G.

[0007] Preferably, in S2, a pulse interval characteristic baseline is generated at the dispatch center based on the background electromagnetic pulse, as follows: In the dispatch center, the difference in arrival time between adjacent background electromagnetic pulses is obtained as the interval value to generate a background electromagnetic pulse interval sequence; Perform probability distribution statistics on the background pulse interval sequence to obtain the mean and variance of the interval values. Use the probability density function to obtain the interval value corresponding to the peak value of the probability density function and the interval range within the preset confidence interval for the background pulse interval sequence. The pulse interval characteristic baseline is formed by combining the mean, variance, and peak value of the probability density function of the interval value with the interval range within the preset confidence interval.

[0008] Preferably, in step S3, an instruction library is acquired, a mapping mechanism is constructed, emergency instructions are extracted from the instruction library to form an emergency instruction set, and a unique pulse interval pattern is assigned to each emergency instruction in the emergency instruction set, as follows: Obtain the instruction library, which includes a regular multi-byte instruction set and a basic single-byte instruction set; Basic single-byte instructions include emergency stop, acceleration, deceleration, and change of direction; According to preset rules, basic single-byte instructions are extracted from the basic single-byte instruction set as emergency instructions to form an emergency instruction set. For regular multibyte instructions in the regular multibyte instruction set, Chinese word segmentation technology is used to segment each regular multibyte instruction to obtain the segmentation results of the regular multibyte instructions, forming a segmentation result set; if there are English or structured instructions in the regular multibyte instructions, the English or structured instructions are segmented by combining space segmentation with regular expression matching. Stop words are obtained by pre-setting a stop word list, and stop words in the segmentation results of regular multi-byte instructions in the segmentation result set are deleted to obtain keyword instructions, forming a keyword instruction set; The keyword instructions in the keyword instruction set and the emergency instructions in the emergency instruction set are converted into vectors using a word vector model to obtain the keyword instruction vector corresponding to the keyword instruction and the emergency instruction vector corresponding to the emergency instruction. Obtain the cosine similarity between the keyword instruction vector and the emergency instruction vector. When the cosine similarity is greater than or equal to a preset threshold, establish a mapping between the keyword instruction corresponding to the keyword instruction vector and the emergency instruction corresponding to the emergency instruction vector to form the first mapping table. A second mapping table is formed by establishing a mapping between the keyword instructions in the first mapping table and their corresponding regular multibyte instructions. Each emergency command in the emergency command set is assigned a unique pulse interval pattern, and a mapping is established between the emergency command and the pulse interval pattern to form a third mapping table; the third mapping table is then transmitted to the vehicle terminal.

[0009] Preferably, in S3, the pulse interval pattern is a sequence of alternating long and short intervals, wherein the lengths of the long and short intervals are integer multiples of the interval values ​​corresponding to the peak values ​​of the probability density function in the pulse interval characteristic baseline.

[0010] Preferably, in S4, when the vehicle-mounted terminal is in a strong electromagnetic pulse interference area and the communication link is interrupted, the first instruction set to be transmitted in the dispatch center is obtained; the first instruction set to be transmitted obtains the emergency instruction set to be transmitted through a mapping mechanism, as follows: When the vehicle-mounted terminal is in a strong electromagnetic pulse interference area and the communication link is interrupted, it acquires the first set of instructions to be transmitted from the dispatch center. For clarity, the communication link interruption here refers to a regular communication link interruption, such as a 4G or 5G signal communication link interruption. Based on the emergency instruction set, emergency instructions are directly selected from the first instruction set to be transmitted as the first emergency instruction to be transmitted. Extract regular multi-byte instructions from the first instruction set to be transmitted to form the second instruction set to be transmitted; According to the second mapping table, the keyword instructions corresponding to the regular multi-byte instructions are selected from the second set of instructions to be transmitted. Then, according to the first mapping table, the emergency instructions corresponding to the keyword instructions are obtained as the second emergency instructions to be transmitted. The first emergency instruction to be transmitted and the second emergency instruction to be transmitted are arranged in the order of the first instruction set to be transmitted to form an emergency instruction set to be transmitted.

[0011] Preferably, in S4, the emergency command set to be transmitted obtains the corresponding pulse interval pattern through a mapping mechanism; according to the pulse interval pattern corresponding to the emergency command set to be transmitted, the dispatch center generates an electromagnetic pulse signal matching the pulse interval pattern by controlling the closing and opening of the switches of its associated high-power loads, and transmits the electromagnetic pulse signal to the strong electromagnetic pulse interference area where the vehicle is located, as follows: Based on the formation of the third mapping table, each first emergency instruction to be transmitted and each second emergency instruction to be transmitted in the set of emergency instructions to be transmitted are mapped to a unique pulse interval pattern, forming a pulse interval pattern set. According to the order of pulse interval patterns in the pulse interval pattern set, the dispatch center generates electromagnetic pulse signals that match the pulse interval patterns by controlling the closing and opening of the switches of the associated high-power loads, and sends the electromagnetic pulse signals to the strong electromagnetic pulse interference area where the vehicle is located. High-power loads include high-voltage electric arc furnaces, large transformers, or broadcast antenna transmitters. The electromagnetic pulse signal that matches the pulse interval pattern is generated as follows: Based on the pulse interval pattern, a load control timing signal is generated. The load control timing signal includes two types of parameters: switch closing duration and switch opening interval. The closing duration is a fixed value to ensure the generation of a recognizable electromagnetic pulse. The opening interval strictly matches the long interval value and short interval value in the pulse interval pattern. The load control timing signal is sent to the control switch connected to the high-power load. By controlling the closing and opening of the switch of the high-power load, an electromagnetic pulse signal is radiated. As an explanation, a high-power load will radiate an electromagnetic pulse due to the strong current change when the switch is closed, but will not generate an electromagnetic pulse when the switch is open. The dispatch center and the control switch of the high-power load are physically connected or have a preset control authorization protocol.

[0012] Preferably, in S5, the vehicle-mounted terminal continuously collects electromagnetic pulse signals from the strong electromagnetic pulse interference area to form a real-time pulse interval sequence, as follows: By setting an intensity threshold, the vehicle-mounted terminal continuously collects electromagnetic pulse signals greater than or equal to the intensity threshold in the strong electromagnetic pulse interference area through a broadband electromagnetic pulse sensor, and marks the arrival time of each electromagnetic pulse signal. Record the time interval between adjacent electromagnetic pulse signals to form a real-time pulse interval sequence; As an explanation: The electromagnetic pulse signal is much larger than the background electromagnetic pulse in the strong electromagnetic pulse interference zone of the vehicle. Therefore, setting an intensity threshold can block most of the background electromagnetic pulse, which can greatly alleviate the interference of the background electromagnetic pulse.

[0013] Preferably, in step S5, the real-time pulse interval sequence is matched with the pulse interval pattern in the mapping mechanism; if the match is successful, an emergency command corresponding to the pulse interval pattern is generated, as follows: The similarity between the real-time pulse interval sequence and each pulse interval pattern in the third mapping table is calculated using a normalized cross-correlation algorithm. The pulse interval pattern with the highest similarity and exceeding a preset threshold is identified as a successfully matched pulse interval pattern. Emergency commands corresponding to the successfully matched pulse interval patterns are generated based on the third mapping table.

[0014] A vehicle transportation management system, comprising: Background electromagnetic pulse acquisition module: Acquires background electromagnetic pulses in the current area via a vehicle-mounted terminal; Pulse interval characteristic baseline generation module: Generates pulse interval characteristic baseline at the dispatch center based on background electromagnetic pulse; Mapping Mechanism and Pulse Interval Pattern Generation Module: Acquires the instruction library, constructs the mapping mechanism, extracts emergency instructions from the instruction library to form an emergency instruction set, and assigns a unique pulse interval pattern to each emergency instruction in the emergency instruction set. Electromagnetic pulse signal generation module: When the vehicle-mounted terminal is in a strong electromagnetic pulse interference area and the communication link is interrupted, it obtains the first instruction set to be transmitted from the dispatch center; the first instruction set to be transmitted obtains the emergency instruction set to be transmitted through a mapping mechanism; the emergency instruction set to be transmitted obtains the corresponding pulse interval pattern through a mapping mechanism; the dispatch center generates an electromagnetic pulse signal that matches the pulse interval pattern by controlling the closing and opening of the switches of its associated high-power loads, and transmits the electromagnetic pulse signal to the strong electromagnetic pulse interference area where the vehicle-mounted terminal is located. Emergency command generation module: The vehicle-mounted terminal continuously collects electromagnetic pulse signals from areas with strong electromagnetic pulse interference to form a real-time pulse interval sequence; it matches the real-time pulse interval sequence with the pulse interval pattern in the mapping mechanism; if the match is successful, it generates an emergency command corresponding to the pulse interval pattern.

[0015] The vehicle transportation management method and system proposed in this invention have the following beneficial technical effects: 1. This application utilizes the background electromagnetic environment of a strong electromagnetic pulse (ESP) interference zone as a communication channel, that is, the interference environment itself serves as the communication channel. By establishing a pulse interval characteristic baseline, the artificially modulated pulse interval pattern is correlated with the statistical characteristics of the background pulse. Specifically, the lengths of long and short intervals are integer multiples of the interval values ​​corresponding to the peak values ​​of the probability density function in the pulse interval characteristic baseline. This allows the command signal to both blend into the environmental background to avoid interference and be identified through regular differences. Compared to the problem of traditional communication methods completely failing under strong interference, this method enables the transmission of emergency commands in a strong EMP interference environment. It allows communication to be established for command vehicles even when strong EMP interference and communication links are interrupted, alleviating the technical problem of vehicles being unable to command due to communication interruptions in strong EMP interference zones.

[0016] 2. This application establishes a mapping mechanism through three mapping tables. When the vehicle-mounted terminal is subjected to strong electromagnetic pulse interference and the communication link is interrupted, for the first set of instructions to be transmitted that cannot be transmitted further in the dispatch center, according to the emergency instruction set, emergency instructions are directly selected from the first set of instructions to be transmitted as the first emergency instructions to be transmitted. Regular multi-byte instructions are extracted from the first set of instructions to be transmitted to form the second set of instructions to be transmitted. According to the second mapping table, keyword instructions corresponding to regular multi-byte instructions are selected from the second set of instructions to be transmitted. Then, according to the first mapping table, emergency instructions corresponding to keyword instructions are obtained as the second emergency instructions to be transmitted. The first and second emergency instructions to be transmitted are sorted according to the order in the first set of instructions to be transmitted to form the emergency instruction set to be transmitted. This realizes the conversion of regular multi-byte instructions to emergency instructions, simplifies the complexity of transmitted instructions, and ensures the priority of emergency instructions. Attached Figure Description

[0017] Figure 1 This is a flowchart of a vehicle transportation management method according to the present invention; Figure 2 This is a schematic diagram of a vehicle transportation management system according to the present invention. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] like Figure 1 The vehicle transportation management method shown includes the following steps: S1. Collect background electromagnetic pulses in the current area via the vehicle-mounted terminal; S2. Based on the background electromagnetic pulse, generate a pulse interval characteristic baseline at the dispatch center; S3. Obtain the instruction library, construct a mapping mechanism, extract emergency instructions from the instruction library to form an emergency instruction set, and assign a unique pulse interval mode to each emergency instruction in the emergency instruction set. S4. When the vehicle-mounted terminal is in a strong electromagnetic pulse interference area and the communication link is interrupted, the first instruction set to be transmitted in the dispatch center is obtained; the first instruction set to be transmitted obtains the emergency instruction set to be transmitted through the mapping mechanism; the emergency instruction set to be transmitted obtains the corresponding pulse interval mode through the mapping mechanism; the dispatch center generates an electromagnetic pulse signal that matches the pulse interval mode by controlling the closing and opening of the switch of its associated high-power load, and transmits the electromagnetic pulse signal to the strong electromagnetic pulse interference area where the vehicle-mounted terminal is located. S5. The vehicle-mounted terminal continuously collects electromagnetic pulse signals from areas with strong electromagnetic pulse interference to form a real-time pulse interval sequence; it then matches the real-time pulse interval sequence with the pulse interval pattern in the mapping mechanism; if the match is successful, it generates an emergency command corresponding to the pulse interval pattern.

[0020] This application presents a vehicle command transmission method based on electromagnetic pulse feature recognition, which is applied between the dispatch center and the vehicle terminal. In an optional embodiment, in S1, the background electromagnetic pulse of the current area is collected by the vehicle-mounted terminal, as follows: Within a preset time period, the background electromagnetic pulse of the current area is collected by the wideband electromagnetic pulse sensor on the vehicle. Wideband electromagnetic pulse sensors include ultra-wideband antennas and magnetic ring sensors; If no background electromagnetic pulse is detected within a unit of time, it is determined that there is no usable background pulse in the current area; the method of this application will not be started within the preset time period, and the broadband electromagnetic pulse sensor will be restarted to collect the background electromagnetic pulse of the current area when the next time period arrives. If background electromagnetic pulses are detected within a unit of time, mark the arrival time of each background electromagnetic pulse; The background electromagnetic pulse and its arrival time are transmitted to the dispatch center. The vehicle-mounted terminal can transmit the background electromagnetic pulse and its arrival time to the dispatch center via existing communication links such as 4G or 5G. In an optional embodiment, in S2, a pulse interval characteristic baseline is generated at the dispatch center based on the background electromagnetic pulse, as follows: In the dispatch center, the difference in arrival time between adjacent background electromagnetic pulses is obtained as the interval value to generate a background electromagnetic pulse interval sequence; Perform probability distribution statistics on the background pulse interval sequence to obtain the mean and variance of the interval values. Use the probability density function to obtain the interval value corresponding to the peak value of the probability density function and the interval range within the preset confidence interval for the background pulse interval sequence. The pulse interval characteristic baseline is formed by combining the mean, variance, and peak value of the probability density function of the interval value with the interval range within a preset confidence interval. In an optional embodiment, the preset confidence interval is a 95% confidence interval; In an optional embodiment, in S3, an instruction library is acquired, a mapping mechanism is constructed, emergency instructions are extracted from the instruction library to form an emergency instruction set, and a unique pulse interval pattern is assigned to each emergency instruction in the emergency instruction set, as follows: Obtain the instruction library, which includes a regular multi-byte instruction set and a basic single-byte instruction set; Basic single-byte instructions include emergency stop, acceleration, deceleration, and change of direction; According to preset rules, basic single-byte instructions are extracted from the basic single-byte instruction set as emergency instructions to form an emergency instruction set. For regular multibyte instructions in the regular multibyte instruction set, Chinese word segmentation technology is used to segment each regular multibyte instruction to obtain the segmentation results of the regular multibyte instructions, forming a segmentation result set; if there are English or structured instructions in the regular multibyte instructions, the English or structured instructions are segmented by combining space segmentation with regular expression matching. Stop words are obtained by pre-setting a stop word list, and stop words in the segmentation results of regular multi-byte instructions in the segmentation result set are deleted to obtain keyword instructions, forming a keyword instruction set; The keyword instructions in the keyword instruction set and the emergency instructions in the emergency instruction set are converted into vectors using a word vector model to obtain the keyword instruction vector corresponding to the keyword instruction and the emergency instruction vector corresponding to the emergency instruction. Obtain the cosine similarity between the keyword instruction vector and the emergency instruction vector. When the cosine similarity is greater than or equal to a preset threshold, establish a mapping between the keyword instruction corresponding to the keyword instruction vector and the emergency instruction corresponding to the emergency instruction vector to form the first mapping table. A second mapping table is formed by establishing a mapping between the keyword instructions in the first mapping table and their corresponding regular multibyte instructions. Each emergency command in the emergency command set is assigned a unique pulse interval pattern, and a mapping is established between the emergency command and the pulse interval pattern to form a third mapping table; the third mapping table is then transmitted to the vehicle terminal. In an optional embodiment, in S3, the pulse interval pattern is a sequence of alternating long and short intervals, wherein the lengths of the long and short intervals are integer multiples of the interval values ​​corresponding to the peak values ​​of the probability density function in the pulse interval characteristic baseline. As an explanation: The pulse interval pattern uses the interval value corresponding to the peak value of the probability density function in the pulse interval characteristic baseline as the reference unit. Each emergency command is assigned a unique long interval multiple and short interval multiple. The long interval multiple is not equal to the short interval multiple to ensure that long and short intervals can be distinguished. The uniqueness of the pulse interval pattern can be ensured by the combination of the number of intervals and the multiple. For example, even if two emergency commands have the same long interval multiple and short interval multiple, they can be distinguished by the number of intervals, such as 3 and 5. If the number of intervals is the same, they can be distinguished by different combinations of long interval multiple and short interval multiple. In an optional embodiment, in S4, when the vehicle-mounted terminal is in a strong electromagnetic pulse interference area and the communication link is interrupted, the first instruction set to be transmitted in the dispatch center is obtained; the first instruction set to be transmitted obtains the emergency instruction set to be transmitted through a mapping mechanism, as follows: When the vehicle-mounted terminal is in a strong electromagnetic pulse interference area and the communication link is interrupted, it acquires the first set of instructions to be transmitted from the dispatch center. For clarity, the communication link interruption here refers to a regular communication link interruption, such as a 4G or 5G signal communication link interruption. Based on the emergency instruction set, emergency instructions are directly selected from the first instruction set to be transmitted as the first emergency instruction to be transmitted. Extract regular multi-byte instructions from the first instruction set to be transmitted to form the second instruction set to be transmitted; According to the second mapping table, the keyword instructions corresponding to the regular multi-byte instructions are selected from the second set of instructions to be transmitted. Then, according to the first mapping table, the emergency instructions corresponding to the keyword instructions are obtained as the second emergency instructions to be transmitted. The first emergency instruction to be transmitted and the second emergency instruction to be transmitted are arranged in the order of the first instruction set to be transmitted to form an emergency instruction set to be transmitted; As an explanation, the regular multi-byte instructions and basic single-byte instructions in the first instruction set to be transmitted are arranged in the order in which the instructions were sent when they are acquired; In an optional embodiment, in S4, the emergency command set to be transmitted obtains the corresponding pulse interval pattern through a mapping mechanism; according to the pulse interval pattern corresponding to the emergency command set to be transmitted, the dispatch center generates an electromagnetic pulse signal matching the pulse interval pattern by controlling the closing and opening of the switches of its associated high-power loads, and transmits the electromagnetic pulse signal to the strong electromagnetic pulse interference area where the vehicle is located, as follows: Based on the formation of the third mapping table, each first emergency instruction to be transmitted and each second emergency instruction to be transmitted in the set of emergency instructions to be transmitted are mapped to a unique pulse interval pattern, forming a pulse interval pattern set. According to the order of pulse interval patterns in the pulse interval pattern set, the dispatch center controls the closing and opening of the switches of the associated high-power loads to generate electromagnetic pulse signals with specific interval sequences that match the pulse interval patterns, and sends the electromagnetic pulse signals to the strong electromagnetic pulse interference area where the vehicle is located. High-power loads include high-voltage electric arc furnaces, large transformers, or broadcast antenna transmitters. This application establishes a mapping mechanism through three mapping tables. When the vehicle-mounted terminal is subjected to strong electromagnetic pulse interference and the communication link is interrupted, for the first set of instructions to be transmitted that cannot be transmitted further in the dispatch center, according to the emergency instruction set, emergency instructions are directly selected from the first set of instructions to be transmitted as the first emergency instructions to be transmitted. Regular multi-byte instructions are extracted from the first set of instructions to be transmitted to form the second set of instructions to be transmitted. According to the second mapping table, keyword instructions corresponding to regular multi-byte instructions are selected from the second set of instructions to be transmitted. Then, according to the first mapping table, emergency instructions corresponding to keyword instructions are obtained as the second emergency instructions to be transmitted. The first and second emergency instructions to be transmitted are sorted according to the order in the first set of instructions to be transmitted to form the emergency instruction set to be transmitted. This realizes the conversion of regular multi-byte instructions to emergency instructions, simplifies the complexity of transmitted instructions, and ensures the priority of emergency instructions.

[0021] The electromagnetic pulse signal that matches the pulse interval pattern is generated as follows: Based on the pulse interval pattern, a load control timing signal is generated. The load control timing signal includes two types of parameters: switch closing duration and switch opening interval. The closing duration is a fixed value to ensure the generation of a recognizable electromagnetic pulse. The opening interval strictly matches the long interval value and short interval value in the pulse interval pattern. The load control timing signal is sent to the control switch connected to the high-power load. By controlling the closing and opening of the switch of the high-power load, an electromagnetic pulse signal is radiated. As an explanation, a high-power load will radiate an electromagnetic pulse due to the strong current change when the switch is closed, but will not generate an electromagnetic pulse when the switch is open. The dispatch center has a physical connection or a preset control authorization protocol with the control switch of the high-power load; In an optional embodiment, in S5, the vehicle-mounted terminal continuously collects electromagnetic pulse signals from the strong electromagnetic pulse interference area to form a real-time pulse interval sequence, as follows: By setting an intensity threshold, the vehicle-mounted terminal continuously collects electromagnetic pulse signals greater than or equal to the intensity threshold in the strong electromagnetic pulse interference area through a broadband electromagnetic pulse sensor, and marks the arrival time of each electromagnetic pulse signal. Record the time interval between adjacent electromagnetic pulse signals to form a real-time pulse interval sequence; As an explanation: The electromagnetic pulse signal is much larger than the background electromagnetic pulse in the strong electromagnetic pulse interference zone of the vehicle. Therefore, setting the intensity threshold can block most of the background electromagnetic pulse, which can greatly reduce the interference of the background electromagnetic pulse. In an optional embodiment, in S5, the real-time pulse interval sequence is matched with the pulse interval pattern in the mapping mechanism; if the match is successful, an emergency command corresponding to the pulse interval pattern is generated, as follows: The similarity between the real-time pulse interval sequence and each pulse interval pattern in the third mapping table is calculated using a normalized cross-correlation algorithm. The pulse interval pattern with the highest similarity and exceeding a preset threshold is identified as a successfully matched pulse interval pattern. Emergency commands corresponding to the successfully matched pulse interval patterns are generated based on the third mapping table.

[0022] As an explanation, the vehicle-mounted unit is equipped with an embedded processing unit such as an MCU or a dedicated vehicle CPU, a data storage device, and a wideband electromagnetic pulse sensor. The embedded processing unit has real-time computing capabilities and can complete the data processing work of generating real-time pulse interval sequences, matching real-time pulse interval sequences with the third mapping table, and generating emergency commands. The storage device is used to store the third mapping table and the pulse interval characteristic baseline. The dispatch center is equipped with server-level processing modules such as multi-core CPUs for data processing.

[0023] As an explanation, if the match is successful in S5 of this application, the emergency command corresponding to the pulse interval mode is generated at the vehicle terminal, rather than being transmitted to the vehicle terminal through the dispatch center. This application utilizes the background electromagnetic environment of a strong electromagnetic pulse (ESP) interference zone as a communication channel, that is, the interference environment itself serves as the communication channel. By establishing a pulse interval characteristic baseline, the artificially modulated pulse interval pattern is correlated with the statistical characteristics of the background pulse. Specifically, the lengths of long and short intervals are integer multiples of the interval values ​​corresponding to the peak values ​​of the probability density function in the pulse interval characteristic baseline. This allows the command signal to both blend into the environmental background to avoid interference and be identified through regular differences. Compared to the problem of traditional communication methods completely failing under strong interference, this method enables the transmission of emergency commands in a strong EMP interference environment. It allows communication to be established for command vehicles even when strong EMP interference and communication links are interrupted, alleviating the technical problem of vehicles being unable to command due to communication interruptions in strong EMP interference zones.

[0024] like Figure 2 The vehicle transportation management system shown includes: Background electromagnetic pulse acquisition module: Acquires background electromagnetic pulses in the current area via a vehicle-mounted terminal; Pulse interval characteristic baseline generation module: Generates pulse interval characteristic baseline at the dispatch center based on background electromagnetic pulse; Mapping Mechanism and Pulse Interval Pattern Generation Module: Acquires the instruction library, constructs the mapping mechanism, extracts emergency instructions from the instruction library to form an emergency instruction set, and assigns a unique pulse interval pattern to each emergency instruction in the emergency instruction set. Electromagnetic pulse signal generation module: When the vehicle-mounted terminal is in a strong electromagnetic pulse interference area and the communication link is interrupted, it obtains the first instruction set to be transmitted from the dispatch center; the first instruction set to be transmitted obtains the emergency instruction set to be transmitted through a mapping mechanism; the emergency instruction set to be transmitted obtains the corresponding pulse interval pattern through a mapping mechanism; the dispatch center generates an electromagnetic pulse signal that matches the pulse interval pattern by controlling the closing and opening of the switches of its associated high-power loads, and transmits the electromagnetic pulse signal to the strong electromagnetic pulse interference area where the vehicle-mounted terminal is located. Emergency command generation module: The vehicle-mounted terminal continuously collects electromagnetic pulse signals from areas with strong electromagnetic pulse interference to form a real-time pulse interval sequence; it matches the real-time pulse interval sequence with the pulse interval pattern in the mapping mechanism; if the match is successful, it generates an emergency command corresponding to the pulse interval pattern.

[0025] For clarification, "acquisition" in this application refers to obtaining the required content or data using existing technical means.

[0026] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0027] In the embodiments provided by this invention, it should be understood that the disclosed system or method can be implemented in other ways. For example, the embodiments of the invention described above are merely illustrative; for instance, the division of modules is only a logical functional division, and there may be other division methods in actual implementation.

[0028] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0029] Furthermore, the functional modules in the various embodiments of the present invention can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated module can be implemented in hardware or in the form of hardware plus software functional modules.

[0030] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the basic characteristics of the present invention.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A vehicle transportation management method, characterized in that, Includes the following steps: S1. Collect background electromagnetic pulses in the current area via the vehicle-mounted terminal; S2. Based on the background electromagnetic pulse, generate a pulse interval characteristic baseline at the dispatch center; S3. Obtain the instruction library, construct a mapping mechanism, extract emergency instructions from the instruction library to form an emergency instruction set, and assign a unique pulse interval mode to each emergency instruction in the emergency instruction set. S4. When the vehicle-mounted terminal is in a strong electromagnetic pulse interference area and the communication link is interrupted, the first instruction set to be transmitted in the dispatch center is obtained; the first instruction set to be transmitted obtains the emergency instruction set to be transmitted through the mapping mechanism; the emergency instruction set to be transmitted obtains the corresponding pulse interval mode through the mapping mechanism; the dispatch center generates an electromagnetic pulse signal that matches the pulse interval mode by controlling the closing and opening of the switch of its associated high-power load, and transmits the electromagnetic pulse signal to the strong electromagnetic pulse interference area where the vehicle-mounted terminal is located. S5. The vehicle-mounted terminal continuously collects electromagnetic pulse signals from areas with strong electromagnetic pulse interference to form a real-time pulse interval sequence; it then matches the real-time pulse interval sequence with the pulse interval pattern in the mapping mechanism; if the match is successful, it generates an emergency command corresponding to the pulse interval pattern.

2. The vehicle transportation management method according to claim 1, characterized in that, In S1, the background electromagnetic pulse of the current area is collected via the vehicle-mounted terminal, as follows: Within a preset time period, the background electromagnetic pulse of the current area is collected by the wideband electromagnetic pulse sensor on the vehicle. If no background electromagnetic pulse is detected within a unit of time, it is determined that there is no usable background pulse in the current area; If background electromagnetic pulses are detected within a unit of time, mark the arrival time of each background electromagnetic pulse; The background electromagnetic pulse and its arrival time are transmitted to the dispatch center.

3. The vehicle transportation management method according to claim 2, characterized in that, In S2, based on the background electromagnetic pulse, a pulse interval characteristic baseline is generated at the dispatch center, as follows: In the dispatch center, the difference in arrival time between adjacent background electromagnetic pulses is obtained as the interval value to generate a background electromagnetic pulse interval sequence; Perform probability distribution statistics on the background pulse interval sequence to obtain the mean and variance of the interval values. Use the probability density function to obtain the interval value corresponding to the peak value of the probability density function and the interval range within the preset confidence interval for the background pulse interval sequence. The pulse interval characteristic baseline is formed by combining the mean, variance, and peak value of the probability density function of the interval value with the interval range within the preset confidence interval.

4. The vehicle transportation management method according to claim 3, characterized in that, In S3, the instruction library is acquired, a mapping mechanism is constructed, emergency instructions are extracted from the instruction library to form an emergency instruction set, and a unique pulse interval pattern is assigned to each emergency instruction in the emergency instruction set, as follows: Obtain the instruction library, which includes a regular multi-byte instruction set and a basic single-byte instruction set; According to preset rules, basic single-byte instructions are extracted from the basic single-byte instruction set as emergency instructions to form an emergency instruction set. For each regular multi-byte instruction in the regular multi-byte instruction set, Chinese word segmentation technology is used to segment each regular multi-byte instruction to obtain the segmentation results of the regular multi-byte instructions, forming a segmentation result set; Stop words are obtained by pre-setting a stop word list, and stop words in the segmentation results of regular multi-byte instructions in the segmentation result set are deleted to obtain keyword instructions, forming a keyword instruction set; The keyword instructions in the keyword instruction set and the emergency instructions in the emergency instruction set are converted into vectors using a word vector model to obtain the keyword instruction vector corresponding to the keyword instruction and the emergency instruction vector corresponding to the emergency instruction. Obtain the cosine similarity between the keyword instruction vector and the emergency instruction vector. When the cosine similarity is greater than or equal to a preset threshold, establish a mapping between the keyword instruction corresponding to the keyword instruction vector and the emergency instruction corresponding to the emergency instruction vector to form the first mapping table. A second mapping table is formed by establishing a mapping between the keyword instructions in the first mapping table and their corresponding regular multibyte instructions. Each emergency command in the emergency command set is assigned a unique pulse interval pattern, and a mapping is established between the emergency command and the pulse interval pattern to form a third mapping table; the third mapping table is then transmitted to the vehicle terminal.

5. The vehicle transportation management method according to claim 4, characterized in that, In S3, the pulse interval pattern is a sequence of alternating long and short intervals, where the lengths of the long and short intervals are integer multiples of the interval values ​​corresponding to the peak values ​​of the probability density function in the pulse interval characteristic baseline.

6. The vehicle transportation management method according to claim 4 or 5, characterized in that, In S4, when the vehicle-mounted terminal is in a strong electromagnetic pulse interference area and the communication link is interrupted, it obtains the first instruction set to be transmitted from the dispatch center; the first instruction set to be transmitted obtains the emergency instruction set to be transmitted through a mapping mechanism, as follows: When the vehicle-mounted terminal is in a strong electromagnetic pulse interference area and the communication link is interrupted, it acquires the first set of instructions to be transmitted from the dispatch center. Based on the emergency instruction set, emergency instructions are selected from the first instruction set to be transmitted as the first emergency instruction to be transmitted. Extract regular multi-byte instructions from the first instruction set to be transmitted to form the second instruction set to be transmitted; According to the second mapping table, the keyword instructions corresponding to the regular multi-byte instructions are selected from the second set of instructions to be transmitted. Then, according to the first mapping table, the emergency instructions corresponding to the keyword instructions are obtained as the second emergency instructions to be transmitted. The first emergency instruction to be transmitted and the second emergency instruction to be transmitted are arranged in the order of the first instruction set to be transmitted to form an emergency instruction set to be transmitted.

7. The vehicle transportation management method according to claim 6, characterized in that, In S4, the emergency command set to be transmitted obtains the corresponding pulse interval pattern through a mapping mechanism. Based on the pulse interval pattern corresponding to the emergency command set to be transmitted, the dispatch center generates an electromagnetic pulse signal matching the pulse interval pattern by controlling the closing and opening of the switches of its associated high-power loads, and transmits the electromagnetic pulse signal to the strong electromagnetic pulse interference area where the vehicle is located, as follows: Based on the formation of the third mapping table, each first emergency instruction to be transmitted and each second emergency instruction to be transmitted in the set of emergency instructions to be transmitted are mapped to a unique pulse interval pattern, forming a pulse interval pattern set. According to the order of pulse interval patterns in the pulse interval pattern set, the dispatch center generates electromagnetic pulse signals that match the pulse interval patterns by controlling the closing and opening of the switches of the associated high-power loads, and sends the electromagnetic pulse signals to the strong electromagnetic pulse interference area where the vehicle is located. The electromagnetic pulse signal that matches the pulse interval pattern is generated as follows: A load control timing signal is generated based on the pulse interval pattern; The load control timing signal is sent to the control switch connected to the high-power load. By controlling the opening and closing of the switch of the high-power load, an electromagnetic pulse signal is radiated.

8. The vehicle transportation management method according to claim 7, characterized in that, In S5, the vehicle-mounted unit continuously collects electromagnetic pulse signals from areas with strong electromagnetic pulse interference, forming a real-time pulse interval sequence, as follows: By setting an intensity threshold, the vehicle-mounted terminal continuously collects electromagnetic pulse signals greater than or equal to the intensity threshold in the strong electromagnetic pulse interference area through a broadband electromagnetic pulse sensor, and marks the arrival time of each electromagnetic pulse signal. The time interval between adjacent electromagnetic pulse signals is recorded to form a real-time pulse interval sequence.

9. The vehicle transportation management method according to claim 8, characterized in that, In S5, the real-time pulse interval sequence is matched with the pulse interval pattern in the mapping mechanism; if the match is successful, an emergency command corresponding to the pulse interval pattern is generated, as follows: The similarity between the real-time pulse interval sequence and each pulse interval pattern in the third mapping table is calculated by the normalized cross-correlation algorithm. The pulse interval pattern with the highest similarity and exceeding the preset information threshold is determined as the successfully matched pulse interval pattern. The emergency command corresponding to the successfully matched pulse interval pattern is generated based on the third mapping table.

10. A vehicle transport management system for using the vehicle transport management method according to any one of claims 1 to 9, characterized in that, include: Background electromagnetic pulse acquisition module: Acquires background electromagnetic pulses in the current area via a vehicle-mounted terminal; Pulse interval characteristic baseline generation module: Generates pulse interval characteristic baseline at the dispatch center based on background electromagnetic pulse; Mapping Mechanism and Pulse Interval Pattern Generation Module: Acquires the instruction library, constructs the mapping mechanism, extracts emergency instructions from the instruction library to form an emergency instruction set, and assigns a unique pulse interval pattern to each emergency instruction in the emergency instruction set. Electromagnetic pulse signal generation module: When the vehicle-mounted terminal is in a strong electromagnetic pulse interference area and the communication link is interrupted, it obtains the first instruction set to be transmitted from the dispatch center; the first instruction set to be transmitted obtains the emergency instruction set to be transmitted through a mapping mechanism; the emergency instruction set to be transmitted obtains the corresponding pulse interval pattern through a mapping mechanism; the dispatch center generates an electromagnetic pulse signal that matches the pulse interval pattern by controlling the closing and opening of the switches of its associated high-power loads, and transmits the electromagnetic pulse signal to the strong electromagnetic pulse interference area where the vehicle-mounted terminal is located. Emergency command generation module: The vehicle-mounted terminal continuously collects electromagnetic pulse signals from areas with strong electromagnetic pulse interference, forming a real-time pulse interval sequence; and matches the real-time pulse interval sequence with the pulse interval pattern in the mapping mechanism; If a match is successful, an emergency command corresponding to the pulse interval pattern will be generated.

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