Portable GNSS (Global Navigation Satellite System) interference checking equipment

Abstract

The utility model discloses a portable GNSS interference checking device, which comprises a signal acquisition device, a spectrum analysis device and an intelligent terminal, the signal acquisition device is used for acquiring external radio signals; the signal acquisition device comprises an omnidirectional antenna, a directional antenna, an electric holder and a driving control panel; the directional antenna is installed on the electric holder. The spectrum analysis device is electrically connected with the signal acquisition device and is used for performing spectrum analysis on the external radio signal and generating a spectrogram; the intelligent terminal is electrically connected with the spectrum analysis device and is used for displaying the spectrogram; the intelligent terminal is also in communication connection with the signal acquisition device and is used for generating a control instruction and sending the control instruction to the signal acquisition device; according to the utility model, the electric holder is driven by the driving control panel so as to drive the directional antenna to rotate and scan, and the direction with the strongest interference signal can be quickly locked by combining the control of the intelligent terminal on the direction of the directional antenna and the visualization of the spectral analysis result, so that the positioning efficiency of the GNSS interference source is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of radio signal monitoring technology, and in particular to a portable GNSS interference detection device. Background Technology

[0002] Global Navigation Satellite System (GNSS), as a crucial infrastructure of modern society, provides high-precision positioning, navigation, and timing services to various industries. However, the inherent vulnerabilities of GNSS signals (such as low signal strength and susceptibility to interference), the openness of civilian frequency bands, and the increasingly complex electromagnetic environment pose serious threats of interference and deception. These threats directly impact the safety and efficiency of various industries. Simultaneously, the widespread adoption of e-commerce has lowered the barrier to entry for GNSS jammers, leading to their widespread abuse in multiple illegal sectors. These jammers are characterized by their high degree of concealment, miniaturization, and mobility, increasing the difficulty of location and posing a significant challenge to detection techniques.

[0003] Currently, GNSS interference troubleshooting mainly relies on traditional handheld spectrum analyzers. While these devices offer basic portability, they exhibit a series of functional limitations in practical applications. First, the antenna design of traditional devices is not optimized for the GNSSL1 band, resulting in a large size and numerous inconveniences when used inside vehicles. For example, the antenna needs to extend from the window to avoid the metal shielding effect, posing safety hazards and limiting the diversity of signal direction. Furthermore, the protection level is insufficient to meet the needs of high-speed mobile vehicle scenarios. Second, when troubleshooting interference, traditional handheld spectrum analyzers rely on manual carrying, requiring repeated alternating operations of "vehicle movement - foot detection," which is inefficient and time-consuming. Moreover, because they can only detect discrete signal points, they cannot continuously track dynamic interference sources, easily missing interference sources and failing to achieve comprehensive continuous monitoring along the entire route.

[0004] Furthermore, traditional equipment typically employs a closed system, supporting only local data storage and unable to synchronize to the cloud or cross-platform software in real time, resulting in low efficiency of collaborative analysis during multi-party joint investigations. Simultaneously, the lack of direction identification, networking, and remote control modules prevents the implementation of advanced investigation functions such as multi-point joint positioning and remote real-time monitoring, limiting its applicability in complex scenarios. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention provides a portable GNSS interference investigation device to solve the problems of low efficiency, insufficient accuracy and large functional limitations in the GNSS interference source location of the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a portable GNSS interference troubleshooting device, comprising:

[0008] Signal acquisition device, used to collect external radio signals;

[0009] A spectrum analysis device, electrically connected to a signal acquisition device, is used to perform spectrum analysis on the external radio signals and generate a spectrum diagram.

[0010] The intelligent terminal is communicatively connected to both the spectrum analysis device and the signal acquisition device to display the spectrum diagram transmitted by the spectrum analysis device; it is also used to generate control commands and send them to the signal acquisition device.

[0011] The signal acquisition device includes an omnidirectional antenna, a directional antenna, a motorized pan-tilt unit, and a drive control board; the output terminals of the omnidirectional antenna and the directional antenna are electrically connected to the input terminal of the spectrum analysis device, respectively.

[0012] The directional antenna is mounted on the motorized pan-tilt unit; the input terminal of the drive control board is communicatively connected to the output terminal of the smart terminal, and the output terminal of the drive control board is electrically connected to the motorized pan-tilt unit, so as to drive the motorized pan-tilt unit to rotate according to the control command sent by the smart terminal, thereby adjusting the direction of the directional antenna.

[0013] Optionally, an antenna selector may also be included;

[0014] The input terminal of the antenna selector is electrically connected to the output terminals of the directional antenna and the omnidirectional antenna, respectively. The output terminal of the antenna selector is electrically connected to the input terminal of the spectrum analysis device, which is used to switch the radio signals received by the directional antenna and the omnidirectional antenna and transmit the selected signal to the spectrum analysis device.

[0015] Optionally, the electric gimbal includes a support frame, a servo motor, a transmission component, a bearing, and a fixing assembly;

[0016] The bearing is located inside the support frame, with its outer ring connected to the support frame and its inner ring connected to the transmission component. The servo motor is connected to the support frame, and its output shaft is connected to the bottom end of the transmission component to drive the transmission component to rotate. The fixing component is located at the top of the transmission component and is fixedly connected to the directional antenna.

[0017] Optionally, the signal acquisition device further includes a power supply module; the output terminal of the power supply module is electrically connected to the input terminal of the drive control board to supply power to the drive control board.

[0018] Optionally, the signal acquisition device further includes a protective housing, wherein the directional antenna, the electric pan-tilt unit and the drive control board are all located inside the protective housing, and the omnidirectional antenna is located outside the protective housing;

[0019] The protective shell includes a base and a cover, which covers the base.

[0020] Optionally, the electric gimbal also includes a mounting plate, and the support frame is fixedly connected to the base via the mounting plate;

[0021] The signal acquisition device also includes an antenna connection plate, and the omnidirectional antenna is fixedly connected to the base through the antenna connection plate.

[0022] Optionally, the signal acquisition device may further include several magnetic components;

[0023] The magnetic components are all located at the bottom of the base to magnetically attach the signal acquisition device to the surface of various vehicles or metal objects.

[0024] Optionally, the antenna selector has a built-in bandpass filter to isolate noise from non-GNSS L1 bands.

[0025] Optionally, the smart terminal is a mobile device that supports wireless communication protocols.

[0026] The beneficial effects of the embodiments provided by this utility model include:

[0027] This invention drives an electric pan-tilt unit via a drive control board to rotate and scan a directional antenna. Combined with the control of the directional antenna's direction by a smart terminal and the visualization of spectrum analysis results, it can quickly pinpoint the location of the strongest interference signal, significantly improving the positioning efficiency of GNSS interference sources.

[0028] This invention combines an omnidirectional antenna with a directional antenna, which can meet the needs of both wide-area search and precise positioning, reduce the risk of missed detection, and improve the positioning accuracy of GNSS interference sources. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these drawings.

[0030] Figure 1 A structural block diagram of a portable GNSS interference detection device according to an embodiment of this specification is shown;

[0031] Figure 2A three-dimensional structural diagram of one side of the signal acquisition device according to an embodiment of this specification is shown;

[0032] Figure 3 A three-dimensional structural diagram of the signal acquisition device in the embodiments of this specification is shown on the other side;

[0033] Figure 4 A top view of the signal acquisition device in an embodiment of this specification is shown;

[0034] Figure 5 A bottom view of the signal acquisition device in an embodiment of this specification is shown;

[0035] Figure 6 A schematic diagram of the protective shell structure in the signal acquisition device in the embodiments of this specification is shown;

[0036] Figure 7 Examples of this specification are shown. Figure 2 Details at point A Figure 1 ;

[0037] Figure 8 Examples of this specification are shown. Figure 2 Details at point A Figure 2 ;

[0038] Figure 9 Examples of this specification are shown. Figure 2 Details at point A Figure 3 ;

[0039] Among them, 1 is an electric pan-tilt head; 101 is a support frame; 102 is a bearing; 103 is a transmission component; 104 is a servo motor; 105 is a motor mounting plate; 106 is a mounting plate; 107 is a first fixing component; 108 is a second fixing component; 109 is a mounting hole; 2 is a directional antenna; 201 is a signal transmission line; 3 is an omnidirectional antenna; 4 is a base; 5 is a cover component; 6 is a magnetic component; and 7 is an antenna connection plate. Detailed Implementation

[0040] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] Example 1

[0043] like Figures 1-9 As shown, this embodiment provides a portable GNSS interference investigation device, including a signal acquisition device, a spectrum analysis device, and a smart terminal;

[0044] In some embodiments, the output terminal of the signal acquisition device is electrically connected to the input terminal of the spectrum analysis device to acquire external radio signals and transmit the external radio signals to the spectrum analysis device.

[0045] The output of the spectrum analysis device is communicatively connected to the input of the smart terminal to analyze the external radio signals sent by the signal receiving device, generate a spectrum diagram, and send the spectrum diagram to the mobile terminal for display.

[0046] The output of the smart terminal is communicatively connected to the input of the signal acquisition device to generate control commands and send them to the signal acquisition device.

[0047] In this embodiment, the output terminal of the smart terminal is connected to the input terminal of the spectrum analysis device to adjust and control the relevant parameters of the spectrum analysis device; wherein, the relevant parameters include frequency band parameters, resolution bandwidth, scanning speed, attenuation parameters (attenuation amount of internal attenuator) and amplitude parameters (including reference level and attenuation range).

[0048] For example, the signal acquisition device includes an omnidirectional antenna 3, a directional antenna 2, an electric pan-tilt unit 1, a power module, and a drive control board; wherein, the directional antenna 2 is mounted on the electric pan-tilt unit 1 to move the directional antenna 2 via the electric pan-tilt unit 1.

[0049] Specifically, the outputs of the omnidirectional antenna 3 and the directional antenna 2 are electrically connected to the input of the spectrum analysis device, respectively; the input of the drive control board is communicatively connected to the output of the smart terminal, and the output of the drive control board is electrically connected to the motorized pan-tilt unit 1, which is used to drive the motorized pan-tilt unit 1 to rotate according to the control commands sent by the smart terminal, so as to adjust the direction of the directional antenna 2; the output of the power module is electrically connected to the input of the drive control board, which is used to supply power to the drive control board.

[0050] In some embodiments, any two of the signal acquisition device, spectrum analysis device, and smart terminal can transmit data and send instructions via electrical or communication connections to adapt to flexible communication needs in different application scenarios, achieve collaborative work between different devices, and improve the overall performance of the equipment.

[0051] For example, GNSS interference troubleshooting equipment also includes an antenna selector;

[0052] Specifically, the input terminal of the antenna selector is electrically connected to the output terminals of the directional antenna 2 and the omnidirectional antenna 3, respectively, and the output terminal of the antenna selector is electrically connected to the input terminal of the spectrum analysis device, so as to switch the radio signals received by the directional antenna 2 and the omnidirectional antenna 3 and transmit the selected signal to the spectrum analysis device.

[0053] In some embodiments, the antenna selector has a built-in bandpass filter to isolate noise in non-GNSSL1 frequency bands. Users can adjust the center frequency and passband width of the bandpass filter according to their needs to adjust the bandpass filter's ability to suppress signals in different frequency bands.

[0054] In some embodiments, the output of the smart terminal is communicatively connected to the input of the antenna controller, so as to remotely control the antenna controller to switch antenna electrical signals through the smart terminal.

[0055] For example, the electric gimbal 1 includes a support frame 101, a servo motor 104, a transmission component 103, a bearing 102, and a fixing assembly; wherein the bearing 102 is located inside the support frame 101;

[0056] Specifically, the support frame 101 and the transmission component 103 are connected through the bearing 102. The outer ring of the bearing 102 is connected to the support frame 101, and the inner ring of the bearing 102 is connected to the transmission component 103. The servo motor 104 is connected to the support frame 101, and the output shaft of the servo motor 104 is connected to the bottom end of the transmission component 103 to drive the transmission component 103 to rotate.

[0057] Specifically, the fixing components include a first fixing member 107 and a second fixing member 108. The first fixing member 107 is connected to the top end of the transmission member 103. Both the first fixing member 107 and the second fixing member 108 are provided with several fixing holes, and the first fixing member 107 and the second fixing member 108 are bolted together through the fixing holes. The second fixing member 108 is also provided with a mounting hole 109. The directional antenna 2 is fixed to the second fixing member 108 through the mounting hole 109, and the signal transmission line 201 of the directional antenna 2 passes through the mounting hole 109 and is connected to the antenna selector.

[0058] In this embodiment, the servo motor 104 uses a magnetic encoder, supports closed-loop control, can provide driving torque, and can provide real-time feedback of information such as angle and speed.

[0059] In some embodiments, a motor fixing plate 105 is provided on the support frame 101 and spaced apart from the transmission member 103; the motor fixing plate 105 is provided with a motor mounting hole, and the servo motor 104 is installed in the motor mounting hole.

[0060] In some embodiments, the signal acquisition device further includes a protective housing, wherein the directional antenna 2, the electric pan-tilt unit 1 and the drive control board are all located inside the protective housing, and the omnidirectional antenna 3 is located outside the protective housing;

[0061] Specifically, the protective shell includes a base 4 and a cover 5, with the cover 5 covering the top of the base 4; both the base 4 and the cover 5 are provided with threaded holes, and the base 4 and the cover 5 are fixed by bolts.

[0062] In some embodiments, the electric gimbal 1 further includes a mounting plate 106, and the support frame 101 is fixedly connected to the base 4 via the mounting plate 106.

[0063] In some embodiments, the signal acquisition device further includes an antenna connection plate 7, and the omnidirectional antenna 3 is fixedly connected to the base 4 through the antenna connection plate 7.

[0064] In this embodiment, both the base 4 and the cover 5 are made of fiberglass, which can ensure that the signal acquisition device can receive external signals normally without being affected; and can effectively resist wind resistance, preventing the antenna inside the signal acquisition device from being disturbed when the vehicle is fixed on the vehicle due to the high speed of the vehicle.

[0065] In some embodiments, the signal acquisition device further includes a plurality of magnetic components 6; the plurality of magnetic components 6 are all disposed at the bottom end of the base 4, for magnetically adsorbing and fixing the signal acquisition device to the surface of various vehicles, and enabling quick disassembly and installation.

[0066] In some embodiments, the signal acquisition device can also be attached to a tripod or antenna mast by magnetic attachment 6 to enable long-term real-time signal monitoring of key areas;

[0067] In this embodiment, multiple signal acquisition devices are set up and fixed in different areas using tripods to conduct multi-regional fixed-point monitoring, so as to achieve multi-regional joint positioning and investigation of GNSS interference signals.

[0068] In some embodiments, the smart terminal is a mobile device that supports a wireless communication protocol; wherein, the mobile device includes a mobile phone, a laptop computer, or a tablet computer.

[0069] It should be noted that in this embodiment, the directional antenna 2 can be controlled by a smart terminal to track interference signals by switching working modes in order to obtain the current position coordinates of the interference signals. The working modes include a precise directional mode that adjusts the antenna direction point by point, and an automatic cruise mode that automatically rotates and scans at a preset speed.

[0070] In some embodiments, the smart terminal is also connected to a cloud platform to upload monitoring data from the smart terminal to the cloud platform for storage and analysis; at the same time, the cloud platform analyzes and processes the monitoring data and sends the analysis results to the smart terminal; wherein, the monitoring data includes a spectrum diagram and the current location coordinates of the interference signal.

[0071] In this embodiment, the cloud platform also provides data support for collaborative analysis, remote control, and generation of interference heatmaps for multiple smart terminals;

[0072] Specifically, the smart terminal receives the analysis results sent by the cloud platform and, in conjunction with the Gaode / Baidu Map API or the Civil Aviation ADS-B system, can display the detection location in real time and generate an interference heat map.

[0073] In some embodiments, the omnidirectional antenna 3 is a pointer-type omnidirectional antenna 3 with a frequency band of 1500-1610 MHz and a gain of 5dBi. The omnidirectional antenna 3 is mainly used for fast scanning; the directional antenna 2 is a Yagi directional antenna 2 with a frequency band of 1550-1610 MHz and a gain of 11.5dBi. It is mainly used for precise positioning.

[0074] In some embodiments, the drive control board provides a WiFi hotspot, allowing multiple smart terminals to access it. The smart terminals can log in to a specified IP address through a browser to open the control interface and perform operations.

[0075] In some embodiments, the spectrum analysis device employs the TinySA Ultra portable spectrum analysis module, which is responsible for performing spectrum analysis on the received radio signals and generating a spectrum diagram.

[0076] In some embodiments, the power module includes an inverter and a power adapter for converting different types of power into electrical energy suitable for use by the signal acquisition device.

[0077] In summary, this embodiment uses an electric pan-tilt unit to drive the directional antenna to rotate and scan. Combined with the intelligent terminal's control of direction and visualization of spectrum analysis results, it can quickly pinpoint the location of the strongest interference signal, significantly improving the positioning efficiency of GNSS interference sources. Furthermore, by utilizing the combination of omnidirectional and directional antennas, it can achieve dual-mode switching of "wide-area monitoring and directional tracking," balancing the needs of large-scale search and precise positioning, and reducing the risk of missed detections.

[0078] This embodiment achieves large-scale dynamic coverage by real-time monitoring and generating interference heatmaps, solving the problems of low efficiency and numerous blind spots in traditional manual inspections. Furthermore, by adjusting the direction of the directional antenna and combining the spectrum peak and map coordinates, the interference source can be quickly located. This embodiment supports full automation from scanning to positioning and then to fixed-point monitoring, reducing the need for manual intervention. It is especially suitable for scenarios such as highways and complex electromagnetic environments in cities.

[0079] This embodiment employs a magnetic design, allowing the device to quickly attach to surfaces such as vehicles and metal supports, making it ideal for outdoor and vehicle-mounted mobile applications. Furthermore, compared to existing radio interference detection vehicles and related equipment, this embodiment offers advantages such as lighter weight, smaller size, targeted interference detection for specific frequency bands, and lower equipment cost.

Claims

1. A portable GNSS interference detection device, characterized in that, include: Signal acquisition device, used to collect external radio signals; A spectrum analysis device, electrically connected to a signal acquisition device, is used to perform spectrum analysis on the external radio signals and generate a spectrum diagram. The intelligent terminal is communicatively connected to both the spectrum analysis device and the signal acquisition device to display the spectrum diagram transmitted by the spectrum analysis device; it is also used to generate control commands and send them to the signal acquisition device. The signal acquisition device includes an omnidirectional antenna, a directional antenna, a motorized pan-tilt unit, and a drive control board; the output terminals of the omnidirectional antenna and the directional antenna are electrically connected to the input terminal of the spectrum analysis device, respectively. The directional antenna is mounted on the motorized pan-tilt unit; the input terminal of the drive control board is communicatively connected to the output terminal of the smart terminal, and the output terminal of the drive control board is electrically connected to the motorized pan-tilt unit, so as to drive the motorized pan-tilt unit to rotate according to the control command sent by the smart terminal, thereby adjusting the direction of the directional antenna.

2. The device according to claim 1, characterized in that, It also includes an antenna selector; The input terminal of the antenna selector is electrically connected to the output terminals of the directional antenna and the omnidirectional antenna, respectively. The output terminal of the antenna selector is electrically connected to the input terminal of the spectrum analysis device, which is used to switch the radio signals received by the directional antenna and the omnidirectional antenna and transmit the selected signal to the spectrum analysis device.

3. The device according to claim 1, characterized in that, The electric gimbal includes a support frame, a servo motor, a transmission component, bearings, and a fixing assembly. The bearing is located inside the support frame, with its outer ring connected to the support frame and its inner ring connected to the transmission component. The servo motor is connected to the support frame, and its output shaft is connected to the bottom end of the transmission component to drive the transmission component to rotate. The fixing component is located at the top of the transmission component and is fixedly connected to the directional antenna.

4. The device according to claim 1, characterized in that, The signal acquisition device also includes a power supply module; the output terminal of the power supply module is electrically connected to the input terminal of the drive control board to supply power to the drive control board.

5. The device according to claim 1 or 3, characterized in that, The signal acquisition device also includes a protective shell, with the directional antenna, electric pan-tilt unit and drive control board located inside the protective shell, and the omnidirectional antenna located outside the protective shell. The protective shell includes a base and a cover, which covers the base.

6. The device according to claim 3, characterized in that, The electric gimbal also includes a mounting plate, and the support frame is fixedly connected to the base via the mounting plate; The signal acquisition device also includes an antenna connection plate, and the omnidirectional antenna is fixedly connected to the base through the antenna connection plate.

7. The device according to claim 5, characterized in that, The signal acquisition device also includes several magnetic components; The magnetic components are all located at the bottom of the base to magnetically attach the signal acquisition device to the surface of various vehicles or metal objects.

8. The device according to claim 2, characterized in that, The antenna selector has a built-in bandpass filter to isolate noise in non-GNSS L1 bands.

9. The device according to claim 1, characterized in that, The smart terminal is a mobile device that supports wireless communication protocols.

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