An IFF system

Abstract

The utility model relates to the technical field of friend-or-foe identification, and more specifically, to an friend-or-foe identification system, including a transmitting end, which is used to transmit a friend-or-foe identification signal that is invisible to the naked eye, and to transmit a ranging and positioning signal. When the friend-or-foe identification signal is transmitted, it will be reflected back when encountering an obstacle. The obstacle is defined as a reflection target, and the reflected signal is defined as a reflection signal. The transmitting end performs ranging and positioning on the reflection target according to the transmission signal; a responding end, which is used to receive the signal, and respond when it is identified as an enemy or friendly signal, and locate the transmitting target; and an observing end, which is used to observe the response state of the responding end to the friend-or-foe identification signal. The purpose of the utility model is to overcome the problem that the existing friend-or-foe identification system exposes itself while completing the friend-or-foe identification, and to provide a portable friend-or-foe identification system that can perform friend-or-foe identification and is not easy to expose itself and is miniaturized and lightweight.

Description

Technical Field

[0001] The utility model relates to the technical field of friend-or-foe identification, and more specifically, to a friend-or-foe identification system. Background Art

[0002] The friend-or-foe identification system is one of the important means of military confrontation in the modern information battlefield. It can greatly enhance the accuracy of combat command and control and the coordination between various combat units, significantly speed up the system response speed, and reduce the probability of accidental injury. The friend-or-foe identification system usually needs to make a comprehensive judgment on the attributes and types of the detected targets based on the battlefield environment, target parameters, target characteristics and other data obtained by various detection sensors, and integrate relevant battlefield notifications and other information to determine the attributes and types of the targets. As an identification system for a single soldier, it becomes a single-soldier friend-or-foe identification system, which can be used to help soldiers quickly and accurately identify enemy and friendly targets on the battlefield. The single-soldier friend-or-foe identification system usually includes a variety of sensors and equipment, such as helmets, infrared sights, binoculars, nylon bulletproof vests, combat boots, parachuting equipment, assault rifles, blasting tubes, etc. In addition, it also includes wearable radio stations, portable communication equipment, and masks that reflect its nuclear, biological and chemical protection capabilities.

[0003] The prior art discloses a multifunctional strobe light for helmets, which is used in dim light or at night. While the strobe signal light for helmets completes friendly identification, it also causes the soldier's own position to be exposed to the enemy, which is not conducive to concealment. The working mode of this equipment is not conducive to use on the battlefield. Utility Model Content

[0004] The utility model aims to overcome the problem that the existing friend-or-foe identification system exposes itself while completing friend-or-foe identification, and to provide a portable friend-or-foe identification system which can perform friend-or-foe identification without exposing itself and has the advantages of miniaturization and lightness.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A friend-or-foe identification system includes a transmitting end for transmitting a friend-or-foe identification signal invisible to the naked eye, and transmitting a ranging and positioning signal. When the friend-or-foe identification signal is transmitted, it will be reflected back when encountering an obstacle. The obstacle is defined as a reflection target, and the reflected signal is defined as a reflection signal. The transmitting end performs ranging and positioning on the reflection target according to the transmission signal; a responding end for receiving the signal, responding when identifying it as a friendly signal, and positioning the transmitting target; and an observing end for observing the response state of the responding end to the friend-or-foe identification signal.

[0007] The transmitting end of the utility model can be a transmitter, the responding end can be a transponder, and the observing end can be a sight or night vision equipment that can identify enemy and friend signals at a long distance; the transmitting enemy and friend identification signal that is invisible to the naked eye can be a near-infrared laser; the transmitter can be fixed on the gun rail through a gun clip; the transponder can be fixed on the top or rear of the soldier's helmet through Velcro or screw buckles, or it can be fixed on a motor vehicle or a ship through a strong magnetic seat; the transmitter, transponder and sight can be configured to the same soldier who needs to actively identify the target at the same time, or the transponder can be configured only for soldiers who do not need to actively identify the target according to the needs of the battlefield environment; soldiers equipped with transmitters must also be equipped with sights or night vision equipment. That is, in the utility model, the responding end can be used alone, but the transmitting end must be used together with the observing end. On the battlefield, the soldier at the transmitting end aims at the target as needed and turns on the "identification" button to transmit a laser pulse signal that can be identified by friendly forces. The soldier observes whether the infrared signal is fed back through the sight or night vision equipment. When the infrared signal is fed back immediately, the target is determined to be a friendly force. When the infrared signal is not fed back, the target is determined to be an enemy force, and the soldier can aim and shoot quickly. The responding end detects the identifiable pulse signal and other unidentifiable near-infrared signals. When the identifiable pulse signal emitted by the friendly force is detected, the responding end immediately feeds back the infrared signal; when the unidentifiable pulse signal emitted by the enemy is detected, the infrared signal is not fed back. The responding end soldier can respond quickly and counterattack in time. Here, the responding end defines all the identifiable pulse signals detected by non-friendly forces as unidentifiable pulse signals emitted by the enemy; when the identifiable pulse signals emitted by the friendly force and the unidentifiable pulse signals emitted by the enemy are detected at the same time, the responding end can know the direction of the enemy, so that the responding end soldier can respond quickly and launch a counterattack against the enemy in time. The friend-or-foe identification system of the utility model is suitable for combat environments with dim light or at night, but is not suitable for combat environments with strong light during the day.

[0008] Furthermore, the friend-or-foe identification signal invisible to the naked eye is a near-infrared laser, and the observation end is a near-infrared low-light night vision sight or near-infrared night vision equipment. The observation end is arranged on one side of the transmitting end, so that the transmitting end user can observe the response state of the responding end to the near-infrared band laser signal.

[0009] Furthermore, the transmitting end includes a friend-or-foe signal transmitting module for transmitting a friend-or-foe identification signal that is invisible to the naked eye; a ranging module for measuring distance based on the reflected signal; a first azimuth identification module for determining the position of the reflecting target; a first positioning module for determining the position of the transmitting end itself; the responding end includes: a signal receiving module for receiving the reflected signal; a signal feedback module for transmitting a response signal when the received signal is identified as a friendly signal; a second azimuth identification module for determining the position of the transmitting target; a second positioning module for determining the position of the responding end itself; the first azimuth identification module can obtain information from the second positioning module, and the second azimuth identification module can obtain information from the first positioning module; the observing end includes night vision equipment for identifying the response signal of the responding end. Among them, the enemy and friend signal transmission module is a laser transmission module, which is configured to emit infrared laser signals that are invisible to the naked eye; corresponding to the enemy and friend signal transmission module at the transmitting end is the signal receiving module at the responding end, which is used to receive the enemy and friend signals emitted from the enemy and friend signal transmission module; if the signal receiving module identifies that it is a friendly signal, the signal feedback module is used to transmit a feedback signal to notify the observation end. Generally, the observation end and the transmitting end can be the same end, indicating the friendly identity; the ranging module is for the transmitting end to measure the target within a certain range, especially the distance of the reflective target reflected by the infrared laser signal emitted by the transmitting end after being reflected by an obstacle. The reflective target can be the responding end of the friendly force or the enemy; the first direction identification module is used for the transmitting end to identify the direction and position of the reflective target; preferably, the first direction identification module is an electronic compass structure, which measures the magnetic field strength of the geomagnetic north pole according to the internal magnetometer and then performs signal processing to determine the direction and the direction between the determined target and the transmitting end. The second orientation recognition module is used by the responder to identify the direction and position of the transmitting target. Similarly, the transmitting target here may be a friendly transmitter or an enemy transmitter. The first positioning module of the transmitting end is used to locate the transmitting end itself, so that the responder can identify the position of the transmitting end. The second positioning module of the responder is used to locate the responder itself, so that the transmitting end can identify the position of the responder. The night vision equipment of the observation end can facilitate the transmitter to identify the enemy and the friend. The responder can identify the enemy and the friend alone, but the transmitter needs to be used in conjunction with the observation end to distinguish between the enemy and the friend.

[0010] Further, the friend-enemy signal transmitting module includes a first light transmitting module and a first gear adjustment switch, wherein the first gear adjustment switch is in communication connection with the first light transmitting module; the signal feedback module includes a second light transmitting module and a second gear adjustment switch, wherein the second gear adjustment switch is in communication connection with the second light transmitting module. The first light transmitting module is used to transmit laser or infrared light for friend-enemy identification; the second light transmitting module is also used to transmit laser or infrared light as a feedback signal; the first gear adjustment switch and the second gear adjustment switch are respectively used to adjust the frequency of the light emitted by the first light transmitting module and the second light transmitting module as a mark for friend-enemy identification; when the two are adjusted to the same frequency, they can be sensed and identified to distinguish whether they are friend-enemy. Preferably, the near-infrared lasers emitted by the first light transmitting module and the second light transmitting module are both near-infrared lasers with a wavelength of 940nm and nearby. When the gear selected by the second gear adjustment switch on the responding end of the observation end is consistent with the gear selected by the first gear adjustment switch on the transmitting end, the response signal (continuously flashing infrared light with a certain regularity) can be observed.

[0011] Furthermore, the signal receiving module includes a plurality of photosensitive detection modules arranged in different directions. Arranging photosensitive detection modules in a plurality of different directions can facilitate the signal receiving module to detect light signals emitted from different directions, thereby facilitating the reception and identification of friend or foe.

[0012] Furthermore, the plurality of photosensitive detection modules are evenly distributed along the circumference of the response end. With such an arrangement, the photosensitive detection modules can fully detect light signals from different directions to avoid omissions.

[0013] Furthermore, the transmitting end also includes a calibration module for calibrating the emission direction of the first light emitting module. Preferably, the calibration module is an optical axis adjustment mechanism for adjusting and calibrating the optical axis of the laser emitting module in four directions: up, down, left, and right, so that the transmitting end has both laser emission and laser aiming functions.

[0014] Furthermore, the first positioning module and the second positioning module both contain a SIM card that can be used to determine the geographic location. The SIM card can be used to determine the geographic location of the transmitter and the responder, and can be independently tracked and located by the background device, so that teammates can accurately obtain each other's location.

[0015] Furthermore, the transmitting end and / or the responding end both include a display module for displaying the other party's position and / or a voice prompt module for prompting the other party's position. Preferably, the display module is a text display screen, which is used to display the distance and position between the target object and the transmitting end through the ranging module and the electronic compass structure. The voice prompt module is used to prompt the friendly force's position through voice (headphone voice) when the signal feedback module responds as a friendly force and instantly transmits the agreed near-infrared light signal, and prompts the enemy force's position through voice when the response is an enemy. The principle is that after receiving the corresponding processed signal, the power amplifier IC plays a pre-recorded audio file, such as "Attention, left front, attention...", etc.

[0016] Furthermore, the transponder also includes a vibration warning module, which is used to provide a vibration warning when an enemy signal is identified. The vibration warning module is used to provide a warning when the photosensitive detection module receives a laser signal. The transmitting end can emit multiple near-infrared laser signals of different frequencies. The receiver identifies different signal frequencies through an infrared receiver, and the near-infrared laser signal frequency is agreed upon by teammates to determine whether it is a friendly signal, and then make corresponding prompts. When it is not identified as a friendly signal, the transponder automatically identifies it as a friendly agreed near-infrared laser signal that is not emitted by the aforementioned transmitter. The vibration warning module provides an instant vibration warning. The principle is that the vibration device is a small motor / DC motor. When the signal is processed, the module will vibrate through the centrifugal force of rotation after power is turned on to prompt the transponder user to pay attention to safety and quickly hide.

[0017] Furthermore, the transmitting end includes a transmitting end controller for controlling each module of the transmitting end, and the transmitting end controller is in communication connection with the enemy and friend signal transmitting module, the ranging module, and the first azimuth identification module; the responding end includes a responding end controller for controlling each module of the responding end, and the responding end controller is in communication connection with the signal receiving module, the signal feedback module, and the second azimuth identification module. The transmitting end controller is used to uniformly control each module of the transmitting end to achieve orderly coordination; the responding end controller is used to uniformly control each module of the responding end to achieve orderly coordination.

[0018] Furthermore, the transmitting end includes a first shell, which is used to provide installation space for each module of the transmitting end, and the enemy and friend signal transmitting module, the distance measuring module, and the first direction identification module are all installed in the first shell; the answering end includes a second shell, which is used to provide installation space for each module of the answering end, and the signal receiving module, the signal feedback module, and the second direction identification module are all installed in the second shell. The first shell is used to place and fix the first light emitting module, the distance measuring module, the first direction identification module, the first positioning module, the display module, the transmitting end controller, the first gear adjustment switch, and the calibration module; the second shell is used to integrate and fix multiple photosensitive detection modules, the second light emitting module, the vibration warning module, the voice prompt module, the second direction identification module, the second positioning module, and the second gear adjustment switch arranged in different directions.

[0019] The beneficial effects of the utility model are:

[0020] (1) The IFF system of the utility model uses near-infrared laser of a predetermined frequency as the IFF signal, which is relatively concealed and invisible to the naked eye. It can conceal itself while transmitting the signal;

[0021] (2) In addition to emitting identifiable near-infrared laser signals, the transmitter in the friend-or-foe identification system of the present invention can also accurately measure the distance and direction of the reflecting target and display the position, thereby providing reliable friend-or-foe position information to friendly forces and background equipment, facilitating the organization to respond and make decisions quickly;

[0022] (3) In the friend-or-foe identification system of the utility model, the transponder provides signal feedback to the friendly forces relatively quickly and timely, and it is not easy to expose the target and be tracked;

[0023] (4) In the friend-or-foe identification system of the present invention, the transponder can obtain the real-time direction of friendly or enemy forces through earphone voice prompts when being searched, sighted, and tracked by near-infrared laser signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The utility model is a structural diagram of a friend-or-foe identification system.

[0025] Figure 2 The utility model is a schematic diagram of a friend-or-foe identification system.

[0026] Figure 3 It is a structural diagram of the first direction of the transmitting end of the utility model.

[0027] Figure 4 It is a structural diagram of the second direction of the transmitting end of the utility model.

[0028] Figure 5 It is a structural diagram of the third direction of the transmitting end of the utility model.

[0029] Figure 6 yes Figure 5 Structural diagram after removing the outer cover.

[0030] Figure 7 It is a structural diagram of the first direction of the response end of the utility model.

[0031] Figure 8 This is a structural diagram of the answering end of the utility model in the second direction, with the outer cover and the window removed.

[0032] Fig. 9 yes Figure 7 Structural diagram after removing the outer cover.

[0033] Fig.10 It is a structural diagram of another implementation scheme of the answering end after removing the outer cover.

[0034] The illustrations are as follows:

[0035] 1. Transmitter; 11. Friend-enemy signal transmitting module; 111. First light transmitting module; 112. First gear adjustment switch; 12. Distance measuring module; 13. First orientation recognition module; 14. First positioning module; 15. Calibration module; 16. Display module; 17. Transmitter controller; 18. First shell; 2. Response end; 21. Signal receiving module; 211. Left front photosensitive detection module; 212. Left rear photosensitive detection module; 213. Right front photosensitive detection module; 214. Right rear photosensitive detection module; 215. Top photosensitive detection module; 22. Signal feedback module; 221. Second light transmitting module; 222. Second gear adjustment switch; 23. Second orientation recognition module; 24. Second positioning module; 25. Voice prompt module; 26. Vibration warning module; 27. Response end controller; 28. Second shell; 3. Observation end. DETAILED DESCRIPTION

[0036] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0037] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0039] Example 1

[0040] like Figures 1 to 9 The figure shows an embodiment 1 of an enemy identification system of the utility model, which includes a transmitting end 1, which is used to transmit an enemy friend identification signal that is invisible to the naked eye, and transmit a ranging and positioning signal. When the enemy friend identification signal is transmitted, it will be reflected back when encountering an obstacle. The obstacle is defined as a reflection target, and the reflected signal is defined as a reflection signal. The transmitting end 1 performs ranging and positioning on the reflection target according to the transmission signal; a responding end 2 is used to receive the signal, and respond when it is identified as a friendly signal, and locate the transmitting target; an observing end 3 is used to observe the response status of the responding end 2 to the enemy friend identification signal.

[0041] Specifically, the friend-or-foe identification signal that is invisible to the naked eye is a near-infrared laser, and the observation end 3 is a near-infrared low-light night vision sight or a near-infrared night vision equipment.

[0042] The transmitter 1 sends a signal, and the observation end 3 is used to observe whether there is a response signal feedback. If there is a response feedback signal, it is identified as an enemy or a friendly force; while identifying, the transmitter 1 can quickly obtain the location information of the target and the distance between it and the transmitter, so that the transmitter 1 can prepare for combat. The response end 2 can detect and identify laser signals of different frequencies. When it is identified as a friendly signal, it will immediately send a feedback signal to indicate the identity of the friendly force. When the identified optical signal is an enemy signal, it can quickly respond by hiding or fighting; while detecting the optical signal, the response end 2 can also know the direction of the enemy.

[0043] The transmitting end 1 includes a friend-enemy signal transmitting module 11 for transmitting a friend-enemy identification signal invisible to the naked eye; a distance measuring module 12 for measuring the distance according to the reflected signal; a first azimuth identification module 13 for determining the position of the reflecting target; a first positioning module 14 for determining the position of the transmitting end 1 itself; the responding end 2 includes a signal receiving module 21 for receiving the reflected signal; a signal feedback module 22 for transmitting a response signal when the received signal is identified as a friendly signal; a second azimuth identification module 23 for determining the position of the transmitting target; a second positioning module 24 for determining the position of the responding end 2 itself; the first azimuth identification module 13 can obtain information from the second positioning module 24, and the second azimuth identification module 23 can obtain information from the first positioning module 14; the observing end 3 includes night vision equipment for identifying the response signal of the responding end 2. Preferably, both the first positioning module 14 and the second positioning module 24 contain a SIM card that can be used to determine the geographic location. Specifically, the friend-enemy signal transmitting module 11 includes a first light transmitting module 111 and a first gear adjustment switch 112, and the first gear adjustment switch 112 is communicatively connected to the first light transmitting module 111; the signal feedback module 22 includes a second light transmitting module 221 and a second gear adjustment switch 222, and the second gear adjustment switch 222 is communicatively connected to the second light transmitting module 221. Further, the signal receiving module 21 includes a plurality of photosensitive detection modules arranged in different directions. Furthermore, the plurality of photosensitive detection modules include a left front photosensitive detection module 211, a left rear photosensitive detection module 212, a right front photosensitive detection module 213, a right rear photosensitive detection module 214, and a photosensitive detection module 215 directly above; each photosensitive detection module is evenly distributed along the circumference of the response end 2. The left front photosensitive detection module 211 refers to a photosensitive detection module set at the left front, i.e., -45 degrees, when the transponder is in a horizontal direction. The left rear photosensitive detection module 212 refers to a photosensitive detection module set at the left rear, i.e., -135 degrees, when the transponder is in a horizontal direction. The right front photosensitive detection module 213 refers to a photosensitive detection module set at the right front, i.e., 45 degrees, when the transponder is in a horizontal direction. The right rear photosensitive detection module 214 refers to a photosensitive detection module set at the right rear, i.e., 135 degrees, when the transponder is in a horizontal direction. The top photosensitive detection module 215 refers to a photosensitive detection module set at the top when the transponder is in a horizontal direction. The photosensitive detection modules in 5 directions correspond one by one to the signal detection window set on the transponder. Each photosensitive detection module has a sensing detection function and corresponds to an infrared light signal within a three-dimensional space range of 90 degrees in front of the window. Preferably, the photosensitive detection module is a near-infrared wide-spectrum photodetector used to detect near-infrared light signals, which can detect near-infrared light signals of 940nm and nearby wavelengths. The first gear adjustment switch 112 and / or the second gear adjustment switch 222 can be set to adjust the laser signal to different gears of "1", "2", "3", "4", "5", "6", "7", and "0", and also have a shutdown function.Preferably, the photosensitive detection module also has the function of identifying the position of the transmitting target, so the photosensitive detection module can replace the second position identification module 23.

[0044] As an improved solution of this embodiment, the transmitting end 1 further includes a calibration module 15, which is used to calibrate the emission direction of the first light emitting module 111. Preferably, the calibration module 15 is an optical axis adjustment mechanism, which is used to adjust and calibrate the optical axis of the laser emitting module in four directions: up, down, left, and right, so that the transmitting end 1 has both laser emission and laser aiming functions.

[0045] As an improved solution of this embodiment, the transmitting end 1 includes a transmitting end controller 17, which is used to control the various modules of the transmitting end 1. The transmitting end controller 17 is communicatively connected with the enemy and friend signal transmitting module 11, the ranging module 12, and the first azimuth identification module 13; the answering end 2 includes an answering end controller 27, which is used to control the various modules of the answering end 2. The answering end controller 27 is communicatively connected with the signal receiving module 21, the signal feedback module 22, and the second azimuth identification module 23. The transmitting end controller 17 is used to uniformly control the various modules of the transmitting end 1 to achieve orderly coordination; the answering end controller 27 is used to uniformly control the various modules of the answering end 2 to achieve orderly coordination. Preferably, the answering end controller 27 is integrated on the second gear adjustment switch 222. When the second gear adjustment switch 222 is turned to zero, each module can be turned off.

[0046] As an improved solution of this embodiment, the transmitting end 1 includes a first housing 18, which is used to provide installation space for each module of the transmitting end 1, and the enemy and friend signal transmitting module 11, the distance measuring module 12, and the first azimuth identification module 13 are all installed in the first housing 18; the answering end 2 includes a second housing 28, which is used to provide installation space for each module of the answering end 2, and the signal receiving module 21, the signal feedback module 22, and the second azimuth identification module 23 are all installed in the second housing 27. The first housing 18 is used to place and fix the first light emitting module 111, the distance measuring module 12, the first azimuth identification module 13, the first positioning module 14, the transmitting end controller 17, the first gear adjustment switch 112, and the calibration module 15; the second housing 28 is used to integrate and fix multiple photosensitive detection modules arranged in different directions, the second light emitting module 221, the second azimuth identification module 23, the second positioning module 24, and the second gear adjustment switch 222.

[0047] Within the knowledge of those skilled in the art, both the transmitting end 1 and the responding end 2 include a power source, preferably a mobile power source, such as a battery, to achieve a portable function.

[0048] Example 2

[0049] This embodiment is an embodiment 2 of an identification friend or foe system. This embodiment is similar to the embodiment 1, except that the transmitting end 1 and / or the responding end 2 both include a display module 16 for displaying the position of the other party and / or a voice prompt module 25 for prompting the position of the other party. Fig.10 The structure diagram shown is that the answering terminal 2 is additionally provided with a voice prompt module 25 .

[0050] Preferably, the display module 16 is a text display screen, which is used to display the distance and direction between the target object and the transmitting end 1 through the distance measurement module 12 and the electronic compass structure. The voice prompt module 25 is used to prompt the friendly army's direction through voice (earphone voice) when the signal feedback module 22 responds as friendly army and instantly transmits the agreed near-infrared light signal, and prompts the enemy army's direction through voice when responding as enemy army. The principle is that after receiving the corresponding processed signal, the power amplifier IC plays a pre-recorded audio file, such as "Attention, left front, attention...", etc.

[0051] Example 3

[0052] This embodiment is another embodiment of an enemy identification system. This embodiment is similar to the embodiment 1, except that the response end 2 further includes a vibration warning module 26 for performing a vibration warning when an enemy signal is identified.

[0053] The vibration warning module 26 is used to issue an early warning when the photosensitive detection module receives a laser signal. The transmitting end 1 can emit multiple near-infrared laser signals of different frequencies. The responding end 2 identifies different signal frequencies through the signal receiving module 21, and determines whether it is a friendly signal through the agreement of the near-infrared laser signal frequency among teammates, and then makes corresponding prompts. When it is not identified as a friendly signal, the transponder automatically identifies it as a friendly agreed near-infrared laser signal that is not emitted by the aforementioned transmitter. The vibration warning module 26 immediately vibrates and warns. Its principle is that the vibration device is a small motor / DC motor. When the signal is processed, the module will vibrate through the centrifugal force of rotation after power is turned on to remind the transponder user to pay attention to safety and quickly hide.

[0054] How the IFF system works

[0055] The transmitter can be fixed to the gun rail through a gun clip; the transponder can be fixed on the top or rear of the soldier's helmet through Velcro or screw clips, or it can be fixed on a motor vehicle or ship through a strong magnetic base; the transmitter, transponder and near-infrared low-light level night vision sight can be configured at the same time for the same soldier who needs to actively identify the target, or the transponder can be configured only for soldiers who do not need to actively identify the target according to the needs of the battlefield environment; soldiers equipped with a transmitter must also be equipped with a near-infrared low-light level night vision sight.

[0056] On the battlefield, the soldier at the transmitting end 1 aims at the target and turns on the "identification" button to transmit a laser pulse signal that can be identified by friendly forces as needed (that is, the gear selected by the second gear adjustment switch 222 on the friendly force's answering end 2 is consistent with the gear selected by the first gear adjustment switch 112 on the transmitting end 1), and observes whether an infrared signal is fed back through the near-infrared low-light night vision sight (flashing 3 times within 1 second). When an infrared signal is fed back immediately, the target is determined to be a friendly force, and when no infrared signal is fed back, the target is determined to be an enemy, and the soldier can quickly aim and shoot.

[0057] The answering end 2 can detect recognizable pulse signals (i.e., the gear selected by the second gear adjustment switch 222 on the friendly answering end 2 is consistent with the gear selected by the first gear adjustment switch 112 on the transmitting end 1) and other unrecognizable near-infrared signals through the wide-spectrum photosensitive detector in the answering end window. When a recognizable pulse signal emitted by a friendly army is detected, the answering end 2 immediately feeds back an infrared signal, and prompts the friendly army's direction through the earphone voice without vibrating for warning; when an unrecognizable pulse signal emitted by the enemy army is detected, an immediate vibration warning is given, and the enemy's direction is prompted through the earphone voice without feeding back an infrared signal, so that the soldiers at the answering end 2 can react quickly and counterattack in time; when both the recognizable pulse signal emitted by the friendly army and the unrecognizable pulse signal emitted by the enemy army are detected at the same time, the answering end 2 immediately vibrates for warning and feeds back an infrared signal, and prompts the enemy's direction through the earphone voice without prompting the friendly army's direction, so that the soldiers at the answering end react quickly and counterattack the enemy in time.

[0058] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A friend-or-foe identification system, characterized in that: include: The transmitting end (1) is used to transmit a friend-or-foe identification signal that is invisible to the naked eye, and to transmit a distance measurement and positioning signal. When the friend-or-foe identification signal is transmitted, it will be reflected back when encountering an obstacle. The obstacle is defined as a reflection target, and the reflected signal is defined as a reflection signal. The transmitting end (1) performs distance measurement and positioning on the reflection target according to the transmission signal. The transmitting end (1) comprises: A friend-or-foe signal transmitting module (11), used for transmitting a friend-or-foe identification signal invisible to the naked eye; A distance measurement module (12), used for measuring the distance according to the reflected signal; A first position identification module (13), used for determining the position of a reflecting target; A first positioning module (14) is used to determine the position of the transmitting end (1); The transponder (2) is used to receive the signal, respond when it is identified as an enemy or friendly signal, and locate the transmitting target; The response end (2) comprises: A signal receiving module (21), used for receiving a reflected signal; A signal feedback module (22) transmits a response signal when identifying that the received signal is a friendly signal; A second position identification module (23) is used to determine the position of the launch target; A second positioning module (24) is used to determine the position of the responding end (2); The first position recognition module (13) can obtain information from the second positioning module (24), and the second position recognition module (23) can obtain information from the first positioning module (14); An observation terminal (3) is used to observe the response status of the response terminal (2) to the friend-or-foe identification signal; The observation end (3) comprises: Night vision equipment is used to identify the response signal of the answering end (2).

2. The friend-or-foe identification system according to claim 1, characterized in that: The friend-or-enemy signal transmission module (11) comprises a first light transmission module (111) and a first gear adjustment switch (112), wherein the first gear adjustment switch (112) is communicatively connected to the first light transmission module (111); the signal feedback module (22) comprises a second light transmission module (221) and a second gear adjustment switch (222), wherein the second gear adjustment switch (222) is communicatively connected to the second light transmission module (221).

3. The friend-or-foe identification system according to claim 2, characterized in that: The signal receiving module (21) comprises a plurality of photosensitive detection modules arranged in different directions.

4. The friend-or-foe identification system according to claim 3, characterized in that: The plurality of photosensitive detection modules are evenly distributed along the circumference of the response end (2).

5. The friend-or-foe identification system according to claim 2, characterized in that: The transmitting end (1) also includes a calibration module (15) for calibrating the emission direction of the first light emitting module (111).

6. The friend-or-foe identification system according to claim 1, characterized in that: The first positioning module (14) and the second positioning module (24) both contain a SIM card that can be used to determine the geographic location.

7. The friend-or-foe identification system according to any one of claims 1 to 6, characterized in that: The transmitting end (1) includes a display module (16) for displaying the other party's position, and / or the responding end (2) includes a display module (16) for displaying the other party's position and / or a voice prompting module (25) for prompting the other party's position.

8. The friend-or-foe identification system according to claim 7, characterized in that: The response end (2) also includes a vibration warning module (26) for providing a vibration warning when an enemy signal is identified.

9. The friend-or-foe identification system according to claim 1, characterized in that: The friend-or-foe identification signal invisible to the naked eye is a near-infrared laser, and the observation end (3) is a near-infrared low-light night vision sight or near-infrared night vision equipment.

10. The friend-or-foe identification system according to claim 1, characterized in that: The transmitting end (1) comprises a transmitting end controller (17) for controlling each module of the transmitting end (1), and the transmitting end controller (17) is communicatively connected to an enemy and friend signal transmitting module (11), a distance measuring module (12), and a first azimuth identification module (13); the responding end (2) comprises a responding end controller (27) for controlling each module of the responding end (2), and the responding end controller (27) is communicatively connected to a signal receiving module (21), a signal feedback module (22), and a second azimuth identification module (23).

11. The friend-or-foe identification system according to claim 1, characterized in that: The transmitting end (1) comprises a first housing (18) for providing installation space for each module of the transmitting end (1), and the friend-enemy signal transmitting module (11), the distance measuring module (12), and the first direction identification module (13) are all installed in the first housing (18); the responding end (2) comprises a second housing (28) for providing installation space for each module of the responding end (2), and the signal receiving module (21), the signal feedback module (22), and the second direction identification module (23) are all installed in the second housing (28).

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