Satellite receiving unit with high dynamic positioning

Abstract

The utility model discloses a satellite receiving unit with high dynamic positioning, which comprises a satellite antenna assembly and a satellite receiver assembly. The satellite antenna assembly is connected with the satellite receiver assembly through a radio frequency line. The utility model solves the problems that the existing navigation receiver is easy to be interfered by impact vibration and interference signals and is poor in accuracy.

Description

Technical Field

[0001] The utility model belongs to the technical field of satellite navigation equipment, and in particular relates to a satellite receiving unit with high dynamic positioning. Background Art

[0002] As Beidou satellite navigation is gaining more and more attention in various fields, satellite navigation has gradually become the preferred positioning and navigation method for various aircraft. Satellite receiving units are mainly used on missiles, aircraft, ocean-going ships, survey and measurement platforms. They are receiving devices that can receive, track, transform and measure signals. They can output spatial position information and speed information in real time under high dynamic conditions, and can receive and process externally forwarded satellite ephemeris signals, meeting the technical requirements of high dynamic applications.

[0003] Existing navigation receiver products are used outdoors and are susceptible to impact and vibration, as well as interference from interference signals, which can cause reference time source deviations, seriously affecting the performance of the TDD system, making the receiving function and accuracy unstable and affecting accuracy. Utility Model Content

[0004] The utility model aims to provide a satellite receiving unit with high dynamic positioning, which solves the problem that the existing navigation receiver is susceptible to impact vibration, interference by interference signals and poor accuracy.

[0005] The technical solution adopted by the utility model is a satellite receiving unit with high dynamic positioning, which comprises a satellite antenna component and a satellite receiver component; the satellite antenna component and the satellite receiver component are connected by a radio frequency line.

[0006] The utility model is also characterized in that:

[0007] The satellite antenna assembly includes an antenna body, an antenna shield is arranged on the antenna body, the bottom of the antenna body is connected to the antenna base, the antenna body is fixed to the antenna base by screws, a low-noise amplifier board is arranged at the bottom of the antenna body, a welding hole is provided in the antenna base, the antenna body is connected to the low-noise amplifier board through the welding hole of the antenna base, a bottom cover is arranged on the bottom surface of the low-noise amplifier board, an antenna interface is arranged on the low-noise amplifier board, a plurality of vias are provided on the bottom cover, the antenna interface is connected to the radio frequency line, and the radio frequency line is led out through the via holes.

[0008] The antenna shielding cover is in the shape of a semi-ellipsoid with a small top and a large bottom. The antenna shielding cover is open at both ends. The top of the antenna shielding cover is connected to the top cover by threads. A step is provided on the circumferential outer wall of the antenna base. An external thread is provided on the outer surface of the step. An internal thread is provided on the inner wall of the bottom of the antenna shielding cover. The external thread and the internal thread are matched by threads to fix the antenna shielding cover on the antenna base. The bottom cover is fixed to the antenna base by screws.

[0009] The satellite receiver assembly includes a component board, a plurality of pads are arranged around the component board, a plurality of through holes are opened on the outer edge of the antenna base, the pads are inserted into the through holes, and the component board is fixed to the antenna base through the pads; the antenna base is connected to the base shell, the component board is located in the base shell, the base shell is made of metal material, the antenna shielding cover is tightly fitted to the base shell, and a potting material is used, and the arc surface of the outer wall of the base shell has a smooth transition with the bottom of the antenna shielding cover.

[0010] The component board includes a power module, a radio frequency module, a signal digital processing module, and a baseband module which are electrically connected to each other; the radio frequency module is connected to the radio frequency line in the satellite antenna assembly.

[0011] The power module supplies power to the component board and converts the power into the voltage required by each module; it performs gain control, frequency conversion, and analog-to-digital conversion on the analog signal; the signal digital processing module converts the analog digital signal into a digital frequency conversion signal through analog-to-digital conversion processing; the baseband module captures, tracks, bit synchronizes, frame synchronizes, and decodes the satellite signal, and sends the demodulated and observed data of each satellite to the PVT solution unit to realize position positioning solution.

[0012] The beneficial effects of the utility model are as follows: the satellite receiving unit of the utility model with high dynamic positioning adopts a double shielding design, the shielding effect is more reliable, the shielding property is optimal, the overall structure is firm and reliable, vibration-resistant, and hammer-resistant, so that the satellite receiving unit has better quality and higher accuracy, and the high dynamic positioning is more precise. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of a satellite antenna assembly of a satellite receiving unit with high dynamic positioning of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of a satellite receiver assembly of a satellite receiving unit with high dynamic positioning of the utility model;

[0015] Figure 3 It is a side view of a satellite receiving unit with high dynamic positioning of the utility model.

[0016] Figure 4 This is a signal processing diagram of the component board of the utility model.

[0017] In the figure, 1. antenna shielding cover, 2. antenna body, 3. antenna base, 4. low noise amplifier board, 5. bottom cover, 6. pad column, 7. component board, 8. base shell. DETAILED DESCRIPTION

[0018] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0019] Example 1

[0020] The utility model discloses a satellite receiving unit with high dynamic positioning, which comprises a satellite antenna component and a satellite receiver component. The satellite antenna component and the satellite receiver component are connected by a radio frequency line.

[0021] like Figure 1 As shown, the satellite antenna assembly includes an antenna body 2, an antenna shielding cover 1 is arranged on the antenna body 2, an antenna base 3 is sleeved on the bottom of the antenna body 2, the antenna body 2 is fixed to the antenna base 3 by screws, a low noise amplifier board 4 is arranged at the bottom of the antenna body 2, a welding hole is provided in the antenna base 3, the antenna body 2 is connected to the low noise amplifier board 4 through the welding hole of the antenna base 3, a bottom cover 5 is arranged on the bottom surface of the low noise amplifier board 4, an antenna interface is arranged on the low noise amplifier board 4, a plurality of vias are provided on the bottom cover 5, the antenna interface is connected to the radio frequency line, and the radio frequency line is led out through the via holes.

[0022] Example 2

[0023] The antenna shield 1 is in the shape of a semi-ellipsoid with a small top and a large bottom. The antenna shield 1 is open at both ends. The inner cavity of the antenna shield 1 can be wound to place a ring antenna. The top of the antenna shield 1 is connected to the top cover by a thread. The antenna body 2 is used to receive signals from the satellite through the top cover opening. The antenna shield 1 is used to shield interference signals. The antenna base 3 is provided with a step on the circumferential outer wall, and the outer surface of the step is provided with an external thread. The inner wall of the bottom of the antenna shield 1 is provided with an internal thread. The external thread and the internal thread are matched by threads. The antenna shield 1 is fixed to the antenna base 3, and the bottom cover 5 is fixed to the antenna base 3 by screws. The antenna base 3 is made of aluminum alloy material, which has better strength and stronger vibration and impact resistance.

[0024] Example 3

[0025] like Figure 2 As shown, the satellite receiver assembly includes a component plate 7, and a number of gaskets 6 are arranged around the component plate 7. A number of through holes are opened around the outer edge of the antenna base 3, and the gaskets 6 are inserted into the through holes. The component plate 7 is fixed to the antenna base 3 through the gaskets 6; the antenna base 3 is connected to the base shell 8, and the component plate 7 is located in the base shell 8. The base shell 8 is made of metal material. The antenna base 3 and the base shell 8 are optimized to leave enough material thickness required for the installation screws. Except for the necessary screw connection parts, the remaining parts are milled thin, and the antenna shielding cover 1 is tightly fitted with the base shell 8. The potting material is used, and the potting glue has the maximum effect of resisting the impact and vibration level. The arc surface of the outer wall of the base shell 8 smoothly transitions with the bottom of the antenna shielding cover 1, as shown in FIG. Figure 3 As shown, the antenna shielding cover 1 and the base shell 8 are inner cavity components for electromagnetic shielding, and the overall structure is firm, reliable, and resistant to vibration and hammering.

[0026] like Figure 4As shown, the component board 7 includes a power module, a radio frequency module, a signal digital processing module, and a baseband module that are electrically connected to each other; the power module supplies power to the component board 7 and converts the power into the voltage required by each module; the radio frequency module is connected to the radio frequency line in the satellite antenna assembly, and performs gain control, frequency conversion, and analog-to-digital conversion on the analog signal; the signal digital processing module converts the analog digital signal into a digital frequency conversion signal through analog-to-digital conversion processing; the baseband module captures, tracks, synchronizes bits, synchronizes frames, and decodes telegrams on satellite signals, and sends the demodulated and observed data of each satellite to the PVT solution unit to achieve position positioning solution.

[0027] The working principle of the satellite receiving unit with high dynamic positioning of the utility model is that the antenna shielding cover 1 is used for electromagnetic shielding, and the base shell 8 is made of metal material to form a double shielding, the shielding effect is more reliable, and the shielding property is optimal; the satellite receiving unit with high dynamic positioning of the utility model adopts an anti-impact and vibration design as a whole to achieve the effects of reinforcement, impact resistance and improved electrical strength, and can achieve more than three high-intensity hammering, so that the satellite receiving unit has the maximum anti-impact and vibration magnitude effect, the lightest weight, and the smallest size, and can receive satellite signals and also achieve high-dynamic and precise positioning.

[0028] The working process of the satellite receiving unit with high dynamic positioning of the utility model is as follows: after the arrangement is completed, the antenna shielding cover 1 of the satellite antenna assembly removes noise through the antenna body 2 and the low noise amplifier board 4, and performs noise reduction, and extracts effective data signals from the weak signal transmitted from the antenna satellite, and then outputs the radio frequency signal of GPS L1 and BDSB1 frequency points output by the receiver receiving the antenna assembly through the signal amplification circuit of the signal digital processing module in the component board 7, and after signal conversion, baseband processing, PVT solution, the navigation information is output through the interface unit.

Claims

1. A satellite receiving unit with high dynamic positioning, characterized in that: It includes a satellite antenna assembly and a satellite receiver assembly; the satellite antenna assembly and the satellite receiver assembly are connected by a radio frequency line; The satellite antenna assembly comprises an antenna body (2), an antenna shielding cover (1) is arranged on the antenna body (2), the bottom of the antenna body (2) is sleeved with an antenna base (3), the antenna body (2) is fixed to the antenna base (3) by screws, a low noise amplifier board (4) is arranged at the bottom of the antenna body (2), a welding hole is provided on the antenna base (3), the antenna body (2) is connected to the low noise amplifier board (4) through the welding hole of the antenna base (3), a bottom cover (5) is arranged on the bottom surface of the low noise amplifier board (4), an antenna interface is arranged on the low noise amplifier board (4), a plurality of via holes are provided on the bottom cover (5), the antenna interface is connected to a radio frequency line, and the radio frequency line is led out through the via holes; The antenna shield (1) is in the shape of a semi-ellipsoid with a small top and a large bottom. The antenna shield (1) is open at both ends. The top of the antenna shield (1) is connected to the top cover by a thread. The circumferential outer wall of the antenna base (3) is provided with a step. The outer surface of the step is provided with an external thread. The inner wall of the bottom of the antenna shield (1) is provided with an internal thread. The external thread and the internal thread are matched by threads. The antenna shield (1) is fixed to the antenna base (3). The bottom cover (5) is fixed to the antenna base (3) by screws. The satellite receiver assembly comprises a component plate (7), a plurality of pad columns (6) are arranged on the circumference of the component plate (7), a plurality of through holes are provided on the circumferential outer edge of the antenna base (3), the pad columns (6) are sleeved in the through holes, and the component plate (7) is fixed on the antenna base (3) through the pad columns (6); the antenna base (3) is connected to a base shell (8), the component plate (7) is located in the base shell (8), the base shell (8) is made of metal material, the antenna shielding cover (1) and the base shell (8) are tightly fitted, a potting material is used, and the arc surface of the outer wall of the base shell (8) and the bottom of the antenna shielding cover (1) are smoothly transitioned.

2. The satellite receiving unit with high dynamic positioning according to claim 1, characterized in that: The component board (7) comprises a power module, a radio frequency module, a signal digital processing module, and a baseband module which are electrically connected to each other; the radio frequency module is connected to a radio frequency line in a satellite antenna assembly.

3. The satellite receiving unit with high dynamic positioning according to claim 2, characterized in that: The power supply module supplies power to the component board (7) and converts the power supply into the voltage required by each module; performs gain control, frequency conversion, and analog-to-digital conversion on the analog signal; the signal digital processing module converts the analog digital signal into a digital frequency conversion signal through analog-to-digital conversion processing; the baseband module captures, tracks, performs bit synchronization, frame synchronization, and telegram decoding processing on the satellite signal, and sends the obtained satellite demodulation and observation data to the PVT solution unit to realize position positioning solution.

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