Object identification and situation monitoring system based on radio frequency perception
Through the drone launch, RF tag feedback and control end analysis of the RF perception system, the problem of enemy identification in the training scenario is solved, accurate identity and location monitoring is achieved in the dark environment, preventing enemy infiltration, and improving the safety and accuracy of simulation training.
Patent Information
- Application Number
- CN202510709370.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-29
- Publication Date
- 2025-08-08
AI Technical Summary
In the existing training scenarios, it is difficult to accurately identify and easily imitate in dark environments, resulting in enemy personnel being easily penetrated and penetrated.
The object recognition and situation monitoring system based on radio frequency perception is adopted. The signal is transmitted through the antenna on the drone transmitter, and the RF tag receives and feedbacks the signal. The control terminal analyzes the signal to judge the identity and position. Combined with high-gain directional antenna and phased array antenna technology to improve the signal coverage, use encrypted passwords to distinguish between enemies and enemies, and fuses the RF tag when an abnormality is detected by the pulse sensor.
Accurate enemy-to-me recognition in the dark environment is achieved, preventing enemy personnel from interspersing and penetrating, and improving the information accuracy and security of simulated training scenarios.
Smart Images
Figure CN120454743A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of intelligent technology, and in particular to an object recognition and situation monitoring system based on radio frequency sensing. Background Art
[0002] In training scenarios, friend-or-foe (FF) identification at a training ground requires the ability to accurately and promptly identify friendly and enemy personnel, and can also be used to assess the situation on the training ground. For example, during current shooting training, different colored tape is often tied around helmets, arms, legs, and other locations to distinguish between participants on both sides. For example, red tape indicates enemy personnel, while blue and yellow tape indicate friendly personnel. This method can facilitate friend-or-foe identification through video reconnaissance to a certain extent, but it also has significant drawbacks. For example, during a raid in darkness, relying solely on tape color can make it difficult to identify friend or foe. Furthermore, this method of tying colored tape is easily imitated, making it easy for enemy personnel to infiltrate. Summary of the Invention
[0003] The present application provides an object recognition and situation monitoring system based on radio frequency sensing to solve the existing inconveniences.
[0004] In a first aspect, the present application provides an object recognition and situation monitoring system based on radio frequency sensing, including a transmitter, a user terminal, and a control terminal, wherein:
[0005] The transmitting end includes a first antenna for transmitting a first signal;
[0006] The user terminal is configured to receive the first signal and feed back a preset second signal to the first antenna when worn by the user;
[0007] The first antenna of the transmitting end is further used to receive the second signal and forward it to the control end;
[0008] The control terminal is used to receive and analyze the second signal and determine the identity of the user terminal.
[0009] In the present application, a first signal is transmitted by the first antenna of the transmitting end, the first signal is received by the user end and a preset second signal is fed back to the first antenna when the user wears it, the first antenna of the transmitting end receives the second signal and forwards it to the control end, the control end receives and parses the second signal and determines the identity of the user end. The transmitting end can initiate a signal instruction, the receiving end feeds back a preset second signal according to the signal instruction, the transmitting end receives and transmits the second signal to the control end, and the identity of the user end is known by parsing the second signal, thereby replacing the traditional method of tying different colored tapes on the helmet, arms, legs and other positions to distinguish different simulated combatants, and realizing radio frequency perception and identification of personnel identity.
[0010] Usually, the transmitting end can be a drone located at a fixed position above the simulated battlefield, and the position of the drone is confirmed by GPS or Beidou navigation system. The first antenna of the drone transmits a first signal (electromagnetic signal). The user end can usually be set as a radio frequency tag, which is worn on the helmet of the simulated combatant to facilitate signal reception. The radio frequency tag is activated after receiving the electromagnetic wave, and its internal receiving antenna will obtain the radio wave signal. Under the action of the changing high-frequency electromagnetic field, the coupling antenna generates an induced current inside its coil according to the Faraday electromagnetic induction principle. The preset second signal carried by the radio frequency tag is fed back through the induced current, and the first antenna can receive the second signal. The second signal is sent to the control end through the communication connection between the transmitting end and the control end. After analysis, the identity of the user end can be determined. The control end can usually be set in the central control room indoors, so that the command center can know the situation of the simulated combatants and facilitate scheduling and control.
[0011] This RF signal feedback and analysis allows for accurate understanding of the simulated combatant's situation and improves the accuracy of simulated intelligence. To ensure accurate transmission and reception of the primary signal over distances of several kilometers or even tens of kilometers, high-gain directional antennas or phased array antenna technology can be used to enhance signal coverage. The aerial perspective of the UAV platform can be used to optimize the signal radiation path, minimizing signal attenuation caused by obstructions. Power amplifiers can also be used to enhance the strength of the transmitted signal. To ensure accurate feedback and reception of the secondary signal over distances of several kilometers or even tens of kilometers, a frequency-modulated continuous wave (FMCW) reflection communication protocol can be used to achieve long-distance information feedback at the user end through tag reflection. Combined with a distributed receiving antenna array, tag reflection signals can be received simultaneously at different locations, improving signal coverage and robustness. The control end, equipped with a highly sensitive receiver-demodulator chip or software-defined radio platform, can identify and analyze the reflected secondary signal under low signal-to-noise ratio conditions, enabling accurate identification and status of remote users.
[0012] In some embodiments, the first antennas are spaced apart, and the number is greater than or equal to 3. The second signal includes the user's location information. After knowing the identity information of the user terminal, for complex simulation exercise scenarios, the location information of the simulated exhibitors is equally important. Therefore, a number greater than or equal to 3 first antennas spaced apart can be set, and electromagnetic wave signals are sent at three different positions through three antennas. After being received by the user terminal, the second signal fed back by the user terminal will carry the response delay or reflected signal strength information between each transmitting source. After the transmitting terminal receives multiple second signals from the same tag, the control terminal can calculate the two-dimensional or three-dimensional coordinate position of the user terminal through three-point ranging or three-sided positioning algorithm based on methods such as signal arrival time difference or received signal strength indication, combined with the fixed spatial coordinates of each antenna, thereby determining the position of the user terminal.
[0013] In some embodiments, the location information of the user terminal is obtained according to the three-point ranging method through the second signal received by the three first antennas set at intervals. According to the positioning principle, the three first antennas set at intervals can determine the location coordinates of the user terminal. This is because the coordinates of the drone are known, and the coordinates of the three antennas on the drone are known. Therefore, the relative position relationship between each first antenna and the user terminal can be inferred by the order of receiving the second signal or the arrival time difference. By comparing the time difference of the three antennas receiving the feedback signal of the same tag, combined with the three-point positioning algorithm, the control end can establish a nonlinear ranging equation group and calculate the actual coordinate position of the user terminal in space. The coordinates of the user terminal can know the actual coordinates of the user terminal according to the order of the second signals fed back, and then determine the actual position of the user terminal.
[0014] In some embodiments, the second signal includes an encryption password and a user code. Typically, a simulated combat scenario involves both friendly and enemy personnel. To further distinguish between friendly and enemy personnel and avoid confusion and undercover operations, an encryption password is added to the second signal. This encrypts friendly personnel, distinguishes friendly and enemy personnel, and prevents the enemy from reading friendly personnel information.
[0015] In some embodiments, the control terminal decrypts the encrypted password to parse the user code and obtain the user's identity. The encrypted password can be processed using symmetric encryption or hash encryption. When obtaining the EPC code, the encrypted password must first be decrypted to obtain the user information. The EPC code corresponding to the second signal can be 96 bits long, with the encrypted password occupying 48 bits and the user information occupying 48 bits.
[0016] In some embodiments, the object code includes at least one of the object's name, rank, and queue number. To further accurately grasp the identity information of the user terminal, at least one of the object's name, rank, and queue number can be carried in the second signal to enable more refined monitoring.
[0017] In some embodiments, the user terminal includes a radio frequency tag, a fuse, a single chip microcomputer, and a pulse sensor, wherein:
[0018] The fuse is connected in series with the radio frequency tag;
[0019] The pulse sensor is used to monitor the user's pulse signal;
[0020] The single chip microcomputer is connected in series with the pulse sensor and is used to drive the fuse to blow when the pulse sensor cannot detect the pulse signal, so that the radio frequency tag becomes invalid and no longer feeds back the preset second signal.
[0021] In the simulated training ground, due to the possibility of being captured, when a simulated combatant on one's side is captured by the enemy, it is necessary to know the capture situation in a timely manner. At this time, the helmet and the pulse sensor can be removed so that the pulse sensor can no longer detect the pulse signal. The microcontroller drives the fuse to blow, making the radio frequency tag invalid and no longer feedback the preset second signal. That is, the first antenna cannot receive the second signal of the captured person. The captured person can be marked or deleted, making the information of the simulated battlefield more accurate.
[0022] Specifically, the pulse sensor can detect the heart rate and pulse of active people in real time, and the single-chip microcomputer collects the data in real time; if the active person is offline and the pulse cannot be detected, the single-chip microcomputer drives the fuse to blow, interrupting the antenna of the RFID tag (the fuse destroys the tag antenna, the tag loses its function, and cannot communicate normally). At this time, the first antenna mounted on the drone cannot read the second signal fed back by the corresponding RFID tag.
[0023] It should be noted that when the RFID tag is not worn on the user, that is, before it is used, and no pulse signal can be detected, it is necessary to reduce unnecessary RFID tag fusing. This can be controlled by combining an initialization delay judgment mechanism with a double trigger judgment. Specifically, the initialization delay mechanism: within a set time window (such as within 30 seconds) after the RFID tag is first activated, the microcontroller is in an observation state and does not immediately determine whether the absence of the pulse signal is abnormal, so as to avoid false triggering and fusing due to the tag not being worn or starting slowly. Double trigger mechanism: Only when the pulse signal is not detected for multiple consecutive cycles (such as 3 heartbeat cycles) after the delay time, and the tag has detected the attached state (for example, through a temperature sensor or a capacitive touch sensor to determine whether it is close to the human body), the fuse blowing instruction is activated, thereby effectively distinguishing between "not worn" and "abnormal state".
[0024] It should be noted that the microcontroller uses a built-in micropower supply to provide energy to drive the fuse. The control signal output by the microcontroller turns on the power tube, causing the energy stored in the micropower supply (such as a button cell or thin-film battery) to flow through the fuse at a high current. This generates heat in a short period of time, burning its conductive path and causing the fuse to operate. This physically cuts off the RFID tag antenna loop, rendering the tag inoperable and no longer feeding back the second signal.
[0025] In some embodiments, the transmitting end further includes a radio frequency identification reader / writer for reading the second signal, and the radio frequency identification reader / writer includes a coupling module, a transceiver module, a control module, and an interface module, wherein:
[0026] The coupling module is used to provide energy and timing to form a first signal;
[0027] The transceiver module is used to send a first signal to the user end and receive a second signal fed back by the user end, specifically, transmit a radio frequency excitation signal through the first antenna and receive the second signal fed back by the radio frequency tag of the user end;
[0028] The control module is used to perform modulation and demodulation, protocol analysis and pre-identification processing on the received second signal;
[0029] The interface module is used to transmit the processed second signal to the control end through a communication link for further analysis, for example, transmitting the processed data to the control end system through wired or wireless communication (such as serial port, Ethernet or wireless module).
[0030] The RFID reader can be used to read and write the second signal received by the first antenna, complete the data connection from the user-end RFID tag to the control end, realize identity recognition, status collection and tag activation and other operations, and provide data support for subsequent analysis and management of the control end.
[0031] In some embodiments, the control terminal includes a processor and a memory, wherein:
[0032] The processor is used to decrypt and parse the second signal to extract the identity code and location information of the user terminal, and perform situation judgment and identity identification based on the analysis results. Specifically, the processor decrypts and parses the received second signal to extract the user identity code, location information and status indication, and performs tasks such as identity matching, situation map annotation, target classification and behavior analysis;
[0033] The memory is used to store a preset user identity database, a location mapping algorithm, and a data processing program for parsing the second signal. Specifically, it stores the identity recognition algorithm program, the tag information database, the training personnel files, the location information mapping rules, and the historical exercise records, supporting the processor to perform real-time query and decision analysis.
[0034] Through the collaborative work of the processor and memory, the control end can receive second signal data from multiple user ends in real time, realize dynamic identity recognition and location tracking, and provide refined command support for simulation exercises. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0036] Figure 1Schematic diagram of an object recognition and situation monitoring system based on radio frequency sensing according to an embodiment of the present application.
[0037] Figure 2 This is a simulation scene diagram of an object recognition and situation monitoring system based on radio frequency sensing according to an embodiment of the present application.
[0038] Figure 3 This is a three-point ranging simulation diagram of an object recognition and situation monitoring system based on radio frequency sensing in one embodiment of the present application.
[0039] Figure 4 This is a schematic diagram of a receiving end of an object recognition and situation monitoring system based on radio frequency sensing according to an embodiment of the present application. DETAILED DESCRIPTION
[0040] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of this application without making any creative efforts shall fall within the scope of protection of this application.
[0041] In training scenarios, friend-or-foe (FF) identification at a training ground requires the ability to accurately and promptly identify friendly and enemy personnel, and can also be used to assess the situation on the training ground. For example, during current shooting training, different colored tape is often tied around helmets, arms, legs, and other areas to distinguish between participants on both sides. For example, red tape indicates enemy personnel, while blue and yellow tape indicate friendly personnel. This method can facilitate friend-or-foe identification through video reconnaissance to a certain extent, but it also has significant drawbacks. For example, during a raid in darkness, relying solely on the color of the tape makes it difficult to identify friend or foe. Furthermore, this method of tying colored tape is easily imitated, making it easy for enemy personnel to infiltrate.
[0042] In view of this, the present application provides an object recognition and situation monitoring system based on radio frequency sensing to solve the existing inconveniences.
[0043] First, as Figure 1 and Figure 2 As shown, the present application provides an object recognition and situation monitoring system based on radio frequency sensing, including a transmitter, a user terminal and a control terminal, wherein:
[0044] The transmitting end includes a first antenna for transmitting a first signal;
[0045] The user terminal is configured to receive the first signal and feed back a preset second signal to the first antenna when worn by the user;
[0046] The first antenna of the transmitting end is further used to receive the second signal and forward it to the control end;
[0047] The control terminal is used to receive and analyze the second signal and determine the identity of the user terminal.
[0048] In the present application, a first signal is transmitted by the first antenna of the transmitting end, the first signal is received by the user end and a preset second signal is fed back to the first antenna when the user wears it, the first antenna of the transmitting end receives the second signal and forwards it to the control end, the control end receives and parses the second signal and determines the identity of the user end. The transmitting end can initiate a signal instruction, the receiving end feeds back a preset second signal according to the signal instruction, the transmitting end receives and transmits the second signal to the control end, and the identity of the user end is known by parsing the second signal, thereby replacing the traditional method of tying different colored tapes on the helmet, arms, legs and other positions to distinguish different simulated combatants, and realizing radio frequency perception and identification of personnel identity.
[0049] Usually, the transmitting end can be a drone located at a fixed position above the simulated battlefield, and the position of the drone is confirmed by GPS or Beidou navigation system. The first antenna of the drone transmits a first signal (electromagnetic signal). The user end can usually be set as a radio frequency tag, which is worn on the helmet of the simulated combatant to facilitate signal reception. The radio frequency tag is activated after receiving the electromagnetic wave, and its internal receiving antenna will obtain the radio wave signal. Under the action of the changing high-frequency electromagnetic field, the coupling antenna generates an induced current inside its coil according to the Faraday electromagnetic induction principle. The preset second signal carried by the radio frequency tag is fed back through the induced current, and the first antenna can receive the second signal. The second signal is sent to the control end through the communication connection between the transmitting end and the control end. After analysis, the identity of the user end can be determined. The control end can usually be set in the central control room indoors, so that the command center can know the situation of the simulated combatants and facilitate scheduling and control.
[0050] This RF signal feedback and analysis allows for accurate understanding of the simulated combatant's situation and improves the accuracy of simulated intelligence. To ensure accurate transmission and reception of the primary signal over distances of several kilometers or even tens of kilometers, high-gain directional antennas or phased array antenna technology can be used to enhance signal coverage. The aerial perspective of the UAV platform can be used to optimize the signal radiation path, minimizing signal attenuation caused by obstructions. Power amplifiers can also be used to enhance the strength of the transmitted signal. To ensure accurate feedback and reception of the secondary signal over distances of several kilometers or even tens of kilometers, a frequency-modulated continuous wave (FMCW) reflection communication protocol can be used to achieve long-distance information feedback at the user end through tag reflection. This, combined with a multi-point distributed receiving antenna array, allows simultaneous reception of tag reflection signals from different locations, improving signal coverage and robustness. A highly sensitive receiver-demodulator chip or software-defined radio platform on the control end can identify and analyze the reflected secondary signal under low signal-to-noise ratio conditions, enabling accurate identification and status of remote users.
[0051] In combination with the first aspect, in some embodiments provided in the present application, the first antennas are arranged at intervals, and the number is greater than or equal to 3. The second signal includes the user's location information. After knowing the identity information of the user terminal, for complex simulation exercise scenarios, the location information of the simulated exhibitors is equally important. Therefore, a number greater than or equal to 3 first antennas arranged at intervals can be set, and electromagnetic wave signals can be sent at three different positions through three antennas. After being received by the user terminal, the second signal fed back by the user terminal will carry the response delay or reflected signal strength information between each transmitting source. After the transmitting terminal receives multiple second signals from the same tag, the control terminal can calculate the two-dimensional or three-dimensional coordinate position of the user terminal through three-point ranging or three-sided positioning algorithm based on methods such as signal arrival time difference or received signal strength indication, combined with the fixed spatial coordinates of each antenna, thereby determining the position of the user terminal.
[0052] In combination with the first aspect, in some embodiments provided in this application, such as Figure 3 As shown, the second signal received by the three first antennas at intervals is used to obtain the location information of the user terminal based on the three-point ranging method. According to the positioning principle, the three first antennas at intervals can determine the location coordinates of the user terminal. This is because the coordinates of the drone are known, and the coordinates of the three antennas on the drone are also known. Therefore, the relative position relationship between each first antenna and the user terminal can be inferred by the order of receiving the second signal or the arrival time difference. By comparing the time difference of the three antennas receiving the feedback signal of the same tag, combined with the three-point positioning algorithm, the control end can establish a nonlinear ranging equation group and calculate the actual coordinate position of the user terminal in space. The coordinates of the user terminal can be known based on the order of the second signals fed back, thereby determining the actual coordinates of the user terminal.
[0053] In conjunction with the first aspect, in some embodiments provided herein, the second signal includes an encrypted password and a user code. Typically, a simulated combat scenario involves both friendly and enemy personnel. To further distinguish between friendly and enemy personnel and avoid confusion and undercover operations, adding an encrypted password to the second signal can encrypt friendly personnel, distinguishing between friendly and enemy personnel and preventing the enemy from reading friendly personnel information.
[0054] In conjunction with the first aspect, in some embodiments provided herein, the control terminal decrypts the encrypted password to parse the user code and obtain the user terminal's identity. The encrypted password can be processed using symmetric encryption or hash encryption. When obtaining the EPC code, the encrypted password must first be decrypted to obtain the user information. The EPC code corresponding to the second signal can be 96 bits long, with the encrypted password occupying 48 bits and the user information occupying 48 bits.
[0055] In conjunction with the first aspect, in some embodiments provided herein, the object code includes at least one of the object's name, rank, and queue number. To further accurately determine the identity of the user, the second signal may include at least one of the object's name, rank, and queue number, enabling more refined monitoring.
[0056] In combination with the first aspect, in some embodiments provided in this application, such as Figure 4 As shown, the user terminal includes a radio frequency tag, a fuse, a single chip microcomputer and a pulse sensor, wherein:
[0057] The fuse is connected in series with the radio frequency tag;
[0058] The pulse sensor is used to monitor the user's pulse signal;
[0059] The single chip microcomputer is connected in series with the pulse sensor and is used to drive the fuse to blow when the pulse sensor cannot detect the pulse signal, so that the radio frequency tag becomes invalid and no longer feeds back the preset second signal.
[0060] In the simulated training ground, due to the possibility of being captured, when a simulated combatant on one's side is captured by the enemy, it is necessary to know the capture situation in a timely manner. At this time, the helmet and the pulse sensor can be removed so that the pulse sensor can no longer detect the pulse signal. The microcontroller drives the fuse to blow, making the radio frequency tag invalid and no longer feedback the preset second signal. That is, the first antenna cannot receive the second signal of the captured person. The captured person can be marked or deleted, making the information of the simulated battlefield more accurate.
[0061] Specifically, the pulse sensor can detect the heart rate and pulse of active people in real time, and the single-chip microcomputer collects the data in real time; if the active person is offline and the pulse cannot be detected, the single-chip microcomputer drives the fuse to blow, interrupting the antenna of the RFID tag (the fuse destroys the tag antenna, the tag loses its function, and cannot communicate normally). At this time, the first antenna mounted on the drone cannot read the second signal fed back by the corresponding RFID tag.
[0062] It should be noted that when the RFID tag is not worn on the user, that is, before it is used, and no pulse signal can be detected, it is necessary to reduce unnecessary RFID tag fusing. This can be controlled by combining an initialization delay judgment mechanism with a double trigger judgment. Specifically, the initialization delay mechanism: within a set time window (such as within 30 seconds) after the RFID tag is first activated, the microcontroller is in an observation state and does not immediately determine whether the absence of the pulse signal is abnormal, so as to avoid false triggering and fusing due to the tag not being worn or starting slowly. Double trigger mechanism: Only when the pulse signal is not detected for multiple consecutive cycles (such as 3 heartbeat cycles) after the delay time, and the tag has detected the attached state (for example, through a temperature sensor or a capacitive touch sensor to determine whether it is close to the human body), the fuse blowing instruction is activated, thereby effectively distinguishing between "not worn" and "abnormal state".
[0063] It should be noted that the microcontroller uses a built-in micropower supply to provide energy to drive the fuse. The control signal output by the microcontroller turns on the power tube, causing the energy stored in the micropower supply (such as a button cell or thin-film battery) to flow through the fuse at a high current. This generates heat in a short period of time, burning its conductive path and causing the fuse to operate. This physically cuts off the RFID tag antenna loop, rendering the tag inoperable and no longer feeding back the second signal.
[0064] In combination with the first aspect, in some embodiments provided herein, the transmitting end further includes a radio frequency identification reader / writer for reading the second signal, the radio frequency identification reader / writer including a coupling module, a transceiver module, a control module, and an interface module, wherein:
[0065] The coupling module is used to provide energy and timing to form a first signal;
[0066] The transceiver module is used to send a first signal to the user end and receive a second signal fed back by the user end, specifically, transmit a radio frequency excitation signal through the first antenna and receive the second signal fed back by the radio frequency tag of the user end;
[0067] The control module is used to perform modulation and demodulation, protocol analysis and pre-identification processing on the received second signal;
[0068] The interface module is used to transmit the processed second signal to the control end through a communication link for further analysis, for example, transmitting the processed data to the control end system through wired or wireless communication (such as serial port, Ethernet or wireless module).
[0069] The RFID reader can be used to read and write the second signal received by the first antenna, complete the data connection from the user-end RFID tag to the control end, realize identity recognition, status collection and tag activation and other operations, and provide data support for subsequent analysis and management of the control end.
[0070] In combination with the first aspect, in some embodiments provided in this application, the control end includes a processor and a memory, wherein:
[0071] The processor is used to decrypt and parse the second signal to extract the identity code and location information of the user terminal, and perform situation judgment and identity identification based on the analysis results. Specifically, the processor decrypts and parses the received second signal to extract the user identity code, location information and status indication, and performs tasks such as identity matching, situation map annotation, target classification and behavior analysis;
[0072] The memory is used to store a preset user identity database, a location mapping algorithm, and a data processing program for parsing the second signal. Specifically, it stores the identity recognition algorithm program, the tag information database, the training personnel files, the location information mapping rules, and the historical exercise records, supporting the processor to perform real-time query and decision analysis.
[0073] Through the collaborative work of the processor and memory, the control end can receive second signal data from multiple user ends in real time, realize dynamic identity recognition and location tracking, and provide refined command support for simulation exercises.
[0074] To sum up, the first signal is transmitted by the first antenna of the transmitting end, the first signal is received by the user end and a preset second signal is fed back to the first antenna when worn by the user, the first antenna of the transmitting end receives the second signal and forwards it to the control end, the control end receives and parses the second signal and determines the identity of the user end. The transmitting end can initiate a signal instruction, the receiving end feeds back a preset second signal according to the signal instruction, the transmitting end receives and transmits the second signal to the control end, and the control end parses the second signal to know the identity of the user end, thereby replacing the traditional method of tying different colored tapes on helmets, arms, legs, etc. to distinguish different simulated combatants, and realizing radio frequency perception and identification of personnel identity.
[0075] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.
[0076] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.
[0077] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.
[0078] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.
[0079] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of the present application.
[0080] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. An object recognition and situation monitoring system based on radio frequency sensing, characterized in that: It includes the transmitter, user and control terminals, including: The transmitting end includes a first antenna for transmitting a first signal; The user terminal is configured to receive the first signal and feed back a preset second signal to the first antenna when worn by the user; The first antenna of the transmitting end is further used to receive the second signal and forward it to the control end; The control terminal is used to receive and analyze the second signal and determine the identity of the user terminal.
2. The object recognition and situation monitoring system based on radio frequency sensing according to claim 1, characterized in that: The first antennas are arranged at intervals, and the number is greater than or equal to 3.
3. The object recognition and situation monitoring system based on radio frequency sensing according to claim 2, characterized in that: The second signal includes location information of the user.
4. The object recognition and situation monitoring system based on radio frequency sensing according to claim 3, characterized in that: The location information of the user terminal is obtained according to the three-point ranging method by receiving the second signal of the first antennas arranged at intervals.
5. The object recognition and situation monitoring system based on radio frequency sensing according to claim 1, characterized in that: The second signal includes an encrypted password and a user code.
6. The object recognition and situation monitoring system based on radio frequency sensing according to claim 5, characterized in that: The control terminal parses the user code by deciphering the encrypted password to obtain the user terminal identity.
7. The object recognition and situation monitoring system based on radio frequency sensing according to claim 6, characterized in that: The object code includes at least one of the object's name, rank, and queue number.
8. The object recognition and situation monitoring system based on radio frequency sensing according to claim 1, characterized in that: The user terminal includes a radio frequency tag, a fuse, a single chip microcomputer and a pulse sensor, wherein: The fuse is connected in series with the radio frequency tag; The pulse sensor is used to monitor the user's pulse signal; The single chip microcomputer is connected in series with the pulse sensor and is used to drive the fuse to blow when the pulse sensor cannot detect the pulse signal, so that the radio frequency tag becomes invalid and no longer feeds back the preset second signal.
9. The object recognition and situation monitoring system based on radio frequency sensing according to claim 1, characterized in that: The transmitting end further includes a radio frequency identification reader / writer for reading the second signal, and the radio frequency identification reader / writer includes a coupling module, a transceiver module, a control module, and an interface module, wherein: The coupling module is used to provide energy and timing to form a first signal; The transceiver module is used to send a first signal to the user terminal and receive a second signal fed back by the user terminal; The control module is used to perform modulation and demodulation, protocol analysis and pre-identification processing on the received second signal; The interface module is used to transmit the processed second signal to the control end through a communication link for further analysis.
10. The object recognition and situation monitoring system based on radio frequency sensing according to claim 1, characterized in that: The control terminal includes a processor and a memory, wherein: The processor is configured to decrypt and parse the second signal to extract the identity code and location information of the user terminal, and perform situation determination and identity identification based on the parsing result; The memory is used to store a preset user identity database, a location mapping algorithm, and a data processing program for parsing the second signal.