Direction finding system for navigation interference detection

Abstract

A direction finding system for navigation interference detection relates to the technical field of navigation communication and comprises a shell, a cover plate and an interface module, an antenna is mounted at the top of the shell, a receiver is arranged in the shell, an input end of the receiver is electrically connected with a north finder and a duplexer respectively, an output end of the receiver is electrically connected with a switch, the duplexer is electrically connected with the antenna, and the antenna is electrically connected with the cover plate. The north seeker, the switch and the receiver are correspondingly and electrically connected with the power supply; the bottom of the shell is correspondingly and hermetically connected with the cover plate, the bottom surface of the cover plate is provided with an interface module, the interface module is provided with a power supply input interface electrically connected with a power supply and a network interface electrically connected with a switch, and the bottom of the interface module is provided with a connector for mounting a tripod; the direction finding system has high portability and stability.

Description

Technical Field

[0001] The utility model relates to the technical field of navigation communication, in particular to a direction finding system for navigation interference detection. Background Art

[0002] In recent years, with the proposal and gradual implementation of the concept of navigation warfare, the application of GPSBD system faces great challenges, and satellite navigation jamming technology develops rapidly. Satellite navigation signals have weak strength, open signal modulation methods, and some navigation data can be predicted, resulting in the navigation system being generally very fragile and easily interfered by virtual signals. QPS interference is a false navigation or timing signal generated by a virtual device that is similar to a real navigation signal. Through strategies, the target receiver mistakes the virtual navigation timing signal for a real signal. Therefore, the importance of resisting satellite navigation interference is increasing, and interference detection is a key system for navigation, control, and direction finding in the process of resisting satellite navigation interference. The direction finding system of interference detection is a signal used to detect the direction of the antenna.

[0003] At present, the direction-finding and positioning systems with anti-interference detection are mostly fixed chassis, terminals, and vehicle-mounted equipment, which are basically installed and used separately. They realize direction-finding and positioning by receiving the environmental signal of the target device to detect and identify the virtual signal. The receiving signal adopts a directional antenna and a compass installed on a fixed platform to receive the environmental navigation signal. The receiver demodulates the frequency-converted modulated signal to the upper computer software to parse the virtual signal direction, so as to realize the detection and direction-finding and positioning function of the virtual navigation signal.

[0004] At present, the direction-finding system for interference detection generally adopts traditional fixed chassis, such as terminal, vehicle-mounted and other structural forms, and is basically installed and used separately. In some special cases, the antenna and receiver are used separately, which has limitations in application scenarios and environmental conditions. For example, in places with harsh environmental conditions, high altitudes and inconvenient for vehicles to pass, the equipment cannot be reached, cannot be used or is inconvenient to use. In addition, when the direction-finding system is maintained, some components fail and need to be disassembled on a fixed platform before they can be taken back to the company for repair, causing a lot of inconvenience and time costs.

[0005] Chinese patent (CN112462184A) discloses a portable directional test antenna and a method of using the same. Although it has high monitoring sensitivity, is compact and light, is easy to store, and has strong mobility, it improves the ability of a single person in a measurement and control station to quickly and autonomously monitor and locate electromagnetic interference sources, and plays a certain role in electromagnetic interference investigation and protection, but for the interference detection system, it is not necessary to frequently change the elevation angle of the antenna, and the azimuth-pitch combination structure in the antenna has a certain lack of stability because it has more rotating parts;

[0006] Therefore, we propose a direction finding system with high portability and stability. Utility Model Content

[0007] In order to overcome the deficiencies in the background technology, the utility model discloses a direction finding system for navigation interference detection.

[0008] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0009] A direction-finding system for navigation interference detection comprises a housing, a cover plate and an interface module, wherein an antenna is installed on the top of the housing, a receiver is arranged in the housing, an input end of the receiver is electrically connected to a north compass and a duplexer respectively, an output end of the receiver is electrically connected to a switch, the duplexer is electrically connected to the antenna, and the north compass, the switch and the receiver are all electrically connected to a power supply correspondingly;

[0010] The bottom of the shell is sealed and connected to the cover plate accordingly. The bottom surface of the cover plate is provided with an interface module. The interface module is provided with a power input interface electrically connected to the power supply and a network interface electrically connected to the switch. The bottom of the interface module is provided with a connecting connector for installing a tripod.

[0011] Preferably, the antenna is configured as a six-array antenna, and any antenna is electrically connected to the receiver via a duplexer.

[0012] Preferably, a fan electrically connected to a power source is provided in the housing.

[0013] Preferably, a PCB board is provided in the shell, wherein the receiver and the duplexer, as well as the receiver and the compass are electrically connected via the PCB board.

[0014] Preferably, the connection joint comprises a flange A, a damping shaft and a flange B, wherein the flange A is mounted on the bottom surface of the interface module by bolts, and a through hole is provided in the middle of the flange A;

[0015] The shaft head end of the damping shaft is in clearance with the through hole, and the shaft tail end of the damping shaft is provided with a plurality of mounting blocks, and the mounting blocks are provided with screw holes for connecting with the tripod;

[0016] A plurality of insertion holes are arranged in the middle of the flange B, and the plurality of insertion holes correspond to the plurality of mounting blocks one by one. The flange B is connected to the flange A correspondingly through bolts.

[0017] Preferably, an extension block is fixedly provided between the damping shaft and the flange B, and the other end of the extension block is provided with a screw hole for connecting with a tripod.

[0018] Preferably, the interface module is provided with a switch capable of controlling the on and off of the power supply.

[0019] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0020] The utility model discloses a direction finding system for navigation interference detection.

[0021] 1. By integrating the receiver, compass, duplexer, power supply and switch in the housing, the volume of the housing can be reduced, thereby improving the portability of the system;

[0022] 2. The housing and the cover are detachable. When the direction finding system fails, the cover can be removed to inspect the receiver, compass, duplexer, power supply and switch in the housing, making the inspection process faster and more convenient.

[0023] 3. The damping shaft in the connecting joint can provide stable support, so that the direction finding system is more stable after being connected to the tripod. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A structural schematic diagram of the utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure of part A in the middle;

[0026] Figure 3 A schematic diagram of the electrical connections of the equipment in the housing.

[0027] In the figure: 1. housing; 2. antenna; 3. receiver; 4. compass; 5. duplexer; 6. switch; 7. power supply; 8. cover; 9. interface module; 91. power input interface; 92. network interface; 93 switch; 10. connecting connector; 101. flange A; 102. damping shaft; 103. flange B; 104. mounting block; 105. extension block; 11. fan; 12. PCB board. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" and the like indicating directions or positional relationships, they are only corresponding to the drawings of the present invention, for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction:

[0029] Embodiment 1 is:

[0030] Combined with Figure 1-3The direction-finding system for navigation interference detection comprises a shell 1, a cover plate 8 and an interface module 9. An antenna 2 is installed on the top of the shell 1. The antenna 2 is detachably connected, and the connection between the antenna 2 and the shell 1 can be a threaded connection. After the shell of the antenna 2 is screwed into the screw hole on the top of the shell 1, the antenna 2 and the receiver 3 are also connected accordingly; a receiver 3 is arranged in the shell 1, and the input end of the receiver 3 is electrically connected to the compass 4 and the duplexer 5 respectively, and the output end of the receiver 3 is electrically connected to the switch 6. The duplexer 5 is electrically connected to the antenna 2, and the compass 4, the switch 6 and the receiver 3 are all electrically connected to the power supply 7 accordingly;

[0031] The satellite signal is received by the antenna 2, and after being filtered by the duplexer 5, it is transmitted to the receiver 3, and the receiver 3 then integrates the data of the compass 4, processes the satellite signal, and finally outputs it from the network interface of the interface module 9 through the switch 6. In addition, the power supply 7 can supply power to the compass 4, the switch 6 and the receiver 3;

[0032] The bottom of the housing 1 is open, and a cover plate 8 is provided at the opening, that is, the bottom of the housing 1 is sealed and connected to the cover plate 8, and an interface module 9 is provided on the bottom surface of the cover plate 8. The interface module 9 is provided with a power input interface 91 electrically connected to the power supply 7, and a network interface 92 electrically connected to the switch 6. The bottom of the interface module 9 is provided with a connection connector 10 for installing a tripod;

[0033] The power input interface 91 is electrically connected to the output end of the external power supply for connecting the external power supply. The AC power then enters the power supply 7 for rectification and voltage reduction, and then supplies power to the corresponding equipment. The network interface 92 enables data exchange between the external host computer and the switch 6.

[0034] It should be noted that the shell 1 and the cover plate 8 are sealed and connected by bolts and are detachable. Therefore, when a fault occurs in the direction finding system, the cover plate 8 can be removed to repair the receiver 3, compass 4, duplexer 5, power supply 7 and switch 6 in the shell 1, making the repair process faster and more convenient.

[0035] Embodiment 2 is:

[0036] On the basis of Example 1, the antenna 2 is set as a six-array antenna, and any antenna is electrically connected to the receiver 3 through a duplexer 5, and the distribution of the six-array antenna is as follows: four antenna elements form a square matrix, and the remaining two antenna elements are located on the extension lines of the two intersecting sides of the square matrix, and the side length of the square is λ, the length of the intersection of the antenna array element on the extension line and the square is 2λ. The arrangement of the six-array antenna can occupy a smaller space while ensuring the accuracy of the antenna array.

[0037] Embodiment 3 is:

[0038] On the basis of Example 1, a fan 11 electrically connected to the power supply 7 is provided in the shell 1, and the fan 11 can dissipate heat and cool the equipment in the object, thereby ensuring that the equipment in the shell 1 can operate stably and improving the smoothness of the operation of this lateral system.

[0039] Embodiment 4 is:

[0040] On the basis of Example 1, a PCB board 12 is provided in the shell 1, wherein the receiver 3 and the duplexer 5, as well as the receiver 3 and the compass 4 are electrically connected through the PCB board 12, that is, the input end of the receiver, the output end of the duplexer 5, and the input end of the compass 4 are all soldered to the corresponding solder points on the PCB board 12, and the PCB board 12 has its own copper wire, which can be used for electrical conduction and signal transmission, thereby eliminating complex cable connections and further reducing the space occupied by the equipment in the shell 1.

[0041] Embodiment 5 is:

[0042] On the basis of Example 1, the connection joint 10 comprises a flange A101, a damping shaft 102 and a flange B103, wherein the flange A101 is mounted on the bottom surface of the interface module 9 by bolts, and a through hole is provided in the middle of the flange A101;

[0043] The shaft head end of the damping shaft 102 is fitted with a clearance in the through hole, and the shaft tail end of the damping shaft 102 is provided with a plurality of mounting blocks 104, and the mounting blocks 104 are provided with screw holes for connecting with the tripod;

[0044] The flange B103 is provided with a plurality of plug holes in the middle thereof, and the plurality of plug holes correspond to the plurality of mounting blocks 104 one by one, and the flange B103 is connected to the flange A101 correspondingly by bolts;

[0045] That is, flange B103 and flange A101 fix the damping shaft 102 therebetween, and when installing the tripod, after the fixing bolts are passed through the mounting plate on the top of the tripod, they are screwed into the screw holes of the corresponding mounting blocks 104, and after a plurality of fixing bolts are screwed into the corresponding screw holes, the installation of the tripod is completed, and under the limitation of flange A101 and flange B103, the firmness of the tripod is greatly improved; in addition, it should be noted that while the damping shaft 102 is fitted with the clearance between the shaft head end and the through hole, it can also be connected to the flange A101 with reinforcing bolts, so as to further improve the firmness of the connection between the damping shaft 102 and the flange A101, so that the damping shaft 102 can better exert its own performance, thereby improving the stability of the overall direction finding equipment when placed on the ground after the tripod is installed.

[0046] Embodiment 6 is:

[0047] On the basis of Example 5, an extension block 105 is fixedly provided between the damping shaft 102 and the flange B, and the other end of the extension block 105 is provided with a screw hole for connecting with the tripod. In the case of this embodiment, when installing the tripod, the fixing bolt passes through the mounting plate on the top of the tripod and is not only screwed into the screw hole of the corresponding mounting block 104, but also screwed into the screw hole of the extension block 105, so that the mounting plate on the top of the tripod is fixed from the middle to the edge by the fixing bolt, thereby further improving the firmness of the tripod installation; and it should be noted that the number of the extension blocks 105 is at least two, and the plurality of extension blocks 105 are evenly arranged in a ring shape with the damping shaft 102 as the center, wherein the optimal number of the extension blocks 105 is three.

[0048] Embodiment 7 is:

[0049] On the basis of Example 1, a switch capable of controlling the on and off of the power supply 7 is provided in the interface module 9. By pressing or toggling the switch, the on and off of the power supply 7 can be controlled accordingly. Thus, when the direction finding device is not in use, by turning off the power supply 7, the energy consumption can be effectively reduced. Moreover, by turning off the power supply 7 before unplugging the external power supply line, the high voltage provided by the external power supply line can be prevented from damaging the power supply 7 or other equipment when the external power supply line is plugged in next time, thereby improving the safety of the direction finding device.

[0050] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the claims involved.

Claims

1. A direction finding system for navigation interference detection, characterized in that: The invention comprises a housing (1), a receiver (3), a compass (4), a duplexer (5), a switch (6), a power supply (7), a cover plate (8) and an interface module (9); an antenna (2) is installed on the top of the housing (1); a receiver (3) is arranged inside the housing (1); an input end of the receiver (3) is electrically connected to the compass (4) and the duplexer (5) respectively; an output end of the receiver (3) is electrically connected to the switch (6); the duplexer (5) is electrically connected to the antenna (2); and the receiver (3), the compass (4) and the switch (6) are all electrically connected to the power supply (7) accordingly; The bottom of the housing (1) is open, and a cover plate (8) is provided at the opening; an interface module (9) is provided on the bottom surface of the cover plate (8); the interface module (9) is provided with a power supply input interface (91) electrically connected to a power source (7), and a network interface (92) electrically connected to a switch (6); a connection connector (10) for mounting a tripod is provided at the bottom of the interface module (9).

2. The navigation interference detection direction finding system according to claim 1, characterized in that: The antenna (2) is configured as a six-array antenna, and any antenna is electrically connected to the receiver (3) via a duplexer (5).

3. The navigation interference detection direction finding system according to claim 1, characterized in that: A fan (11) electrically connected to a power source (7) is arranged in the housing (1).

4. The navigation interference detection direction finding system according to claim 1, characterized in that: A PCB board (12) is arranged inside the housing (1), wherein the receiver (3) and the duplexer (5), as well as the receiver (3) and the compass (4) are electrically connected via the PCB board (12).

5. The direction-finding system for navigation interference detection according to claim 1, characterized in that: The connecting joint (10) comprises a flange A (101), a damping shaft (102) and a flange B (103), wherein the flange A (101) is mounted on the bottom surface of the interface module (9) by means of bolts, and a through hole is provided in the middle of the flange A (101); the shaft head end of the damping shaft (102) is clearance-matched with the through hole, and the shaft tail end of the damping shaft (102) is provided with a plurality of mounting blocks (104), and the mounting blocks (104) are provided with screw holes for connecting with a tripod; The flange B (103) is provided with a plurality of insertion holes in the middle thereof, and the plurality of insertion holes are plugged into the plurality of mounting blocks (104) in a one-to-one correspondence, and the flange B (103) is correspondingly connected to the flange A (101) through bolts.

6. The direction-finding system for navigation interference detection as claimed in claim 5, characterized in that: An extension block (105) is fixedly provided between the damping shaft (102) and the flange B (103), and a screw hole for connecting with a tripod is provided at the other end of the extension block (105).

7. The direction-finding system for detecting navigation interference according to claim 1, characterized in that: The interface module (9) is provided with a switch (93) capable of controlling the on and off of the power source (7).

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