Double-frequency positioning system and electric vehicle

Abstract

The utility model relates to the technical field of positioning systems, and provides a double-frequency positioning system and an electric vehicle. The dual-frequency positioning system comprises a dual-frequency single-layer ceramic antenna and a dual-frequency receiving unit, the dual-frequency single-layer ceramic antenna has a first wave band and a second wave band, and the frequency of the first wave band is different from that of the second wave band; and the dual-frequency receiving unit is electrically connected with the dual-frequency single-layer ceramic antenna, and the dual-frequency receiving unit is used for receiving and demodulating a signal of the dual-frequency single-layer ceramic antenna. According to the dual-frequency positioning system, the dual-frequency laminated ceramic antenna is replaced by the dual-frequency single-layer ceramic antenna, so that the complexity of the antenna is reduced, the cost of the antenna is reduced, and the applicability of the dual-frequency positioning system is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning systems, in particular to a dual-frequency positioning system and an electric vehicle. Background Art

[0002] Currently widely used dual-frequency positioning antennas typically utilize dual-frequency multilayer ceramic antennas (common thickness combinations include 25254 and 35354). In this antenna, two ceramics receive signals in the L1 and L5 frequency bands, respectively. The received signals are processed by two bridges, filtered, and combined. The combined signals are connected to the central control system's dual-frequency Global Navigation Satellite System (GNSS) via SMA or IPEX connectors, enabling dual-frequency single-point or dual-frequency RTK positioning. This positioning method can provide relatively accurate positioning information in practical applications, but its high hardware cost has limited its widespread application in certain fields. Utility Model Content

[0003] The utility model provides a dual-frequency positioning system and an electric vehicle, which are used to solve the defect of high cost of the dual-frequency positioning system in the prior art.

[0004] The utility model provides a dual-frequency positioning system, comprising: a dual-frequency single-layer ceramic antenna and a dual-frequency receiving unit, the dual-frequency single-layer ceramic antenna having a first band and a second band, the first band and the second band having different frequencies; the dual-frequency receiving unit is electrically connected to the dual-frequency single-layer ceramic antenna, and the dual-frequency receiving unit is used to receive and demodulate the signal of the dual-frequency single-layer ceramic antenna.

[0005] According to a dual-frequency positioning system provided by the utility model, the dual-frequency single-layer ceramic antenna includes: a passive antenna and an electric bridge, the passive antenna is electrically connected to the electric bridge; the passive antenna has a silver paste surface, the center position of the silver paste surface is coupled with the first band, and the area outside the center position of the silver paste surface is coupled with the second band.

[0006] According to a dual-frequency positioning system provided by the present invention, it also includes a central control board, and the passive antenna, the electric bridge and the dual-frequency receiving unit are all arranged on the central control board.

[0007] According to a dual-frequency positioning system provided by the present invention, it also includes a reflective circuit board, the passive antenna and the electric bridge are arranged on the reflective circuit board, and the reflective circuit board is arranged on the central control board.

[0008] According to a dual-frequency positioning system provided by the present invention, the dual-frequency receiving unit includes: a first filter, a first band path, a second band path and a dual-frequency positioning module; the first filter is electrically connected to the dual-frequency single-layer ceramic antenna, and the two ends of the first band path are electrically connected to the first filter and the dual-frequency positioning module respectively; the two ends of the second band path are electrically connected to the first filter and the dual-frequency positioning module respectively.

[0009] According to a dual-frequency positioning system provided by the present invention, the first band path includes: a first low-noise amplifier and a second filter, the first low-noise amplifier is electrically connected to the first filter, and the second filter is electrically connected to the first low-noise amplifier and the dual-frequency positioning module.

[0010] According to a dual-frequency positioning system provided by the present invention, the second band path includes: a second low-noise amplifier and a third filter, the second low-noise amplifier is electrically connected to the first filter, and the third filter is electrically connected to the second low-noise amplifier and the dual-frequency positioning module.

[0011] According to a dual-frequency positioning system provided by the present invention, the dual-frequency positioning module is an unpackaged structure.

[0012] According to a dual-frequency positioning system provided by the present invention, the dual-frequency positioning module includes: a dual-frequency RTK positioning chip, an active crystal oscillator and a resistor-capacitor-inductor device. The dual-frequency RTK positioning chip, the active crystal oscillator and the resistor-capacitor-inductor device are all arranged on the central control board; the dual-frequency RTK positioning chip is electrically connected to the first band path and the second band path, and the active crystal oscillator and the resistor-capacitor-inductor device are both electrically connected to the dual-frequency RTK positioning chip.

[0013] The utility model also provides an electric vehicle, comprising a vehicle body and the dual-frequency positioning system as described above, wherein the dual-frequency positioning system is arranged on the vehicle body.

[0014] The dual-frequency positioning system provided by the present invention reduces the complexity of the antenna by replacing the dual-frequency stacked ceramic antenna with a dual-frequency single-layer ceramic antenna, thereby reducing the cost of the antenna and enhancing the applicability of the dual-frequency positioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural diagram of the dual-frequency positioning system provided by the utility model.

[0017] Reference numerals:

[0018] 1. Dual-frequency single-layer ceramic antenna; 2. First filter; 11. Passive antenna; 12. Bridge; 31. First low-noise amplifier; 32. Second filter; 41. Second low-noise amplifier; 42. Third filter; 51. Dual-frequency RTK positioning chip; 52. Active crystal oscillator; 53. Resistor, capacitor, and inductor components. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] The following combination Figure 1 The present invention describes a dual-frequency positioning system and an electric vehicle.

[0021] like Figure 1 As shown, an embodiment of the present invention provides a dual-frequency positioning system, including a dual-frequency single-layer ceramic antenna 1 and a dual-frequency receiving unit. The dual-frequency single-layer ceramic antenna 1 has a first band and a second band, and the first band and the second band have different frequencies. The dual-frequency receiving unit is electrically connected to the dual-frequency single-layer ceramic antenna 1 and is used to receive and demodulate the signal of the dual-frequency single-layer ceramic antenna 1.

[0022] Specifically, in this embodiment, the dual-frequency stacked ceramic antenna commonly used in the prior art is replaced with a dual-frequency single-layer ceramic antenna 1. In the dual-frequency single-layer ceramic antenna 1, the silver paste surface at the center is coupled with the first band, and the surrounding silver paste surfaces are coupled with the second band to meet the needs of dual-frequency positioning. By setting the dual-frequency stacked ceramic antenna as a dual-frequency single-layer ceramic antenna 1, the complexity of the antenna can be reduced, thereby reducing the cost of the antenna. In this embodiment, the dual-frequency single-layer ceramic antenna 1 has two bands, wherein the first band adopts the L1 band and the second band adopts the L5 band. The dual-frequency single-layer ceramic antenna 1 sends the received dual-frequency satellite signal to the dual-frequency receiving unit, and the dual-frequency receiving unit processes the received dual-frequency satellite signal to enable the positioning system to locate and navigate more accurately. In this embodiment, the dual-frequency single-layer ceramic antenna 1 and the dual-frequency receiving unit are electrically connected via an IPEX coaxial cable.

[0023] The dual-frequency positioning system provided by the embodiment of the present invention reduces the complexity of the antenna by replacing the dual-frequency stacked ceramic antenna with a dual-frequency single-layer ceramic antenna, thereby reducing the cost of the antenna and enhancing the applicability of the dual-frequency positioning system.

[0024] like Figure 1 As shown, in an embodiment of the present invention, a dual-band single-layer ceramic antenna 1 includes a passive antenna 11 and a bridge 12, which are electrically connected to each other. The passive antenna 11 has a silver paste surface, the center of which is coupled to the first band, and the area outside the center of the silver paste surface is coupled to the second band.

[0025] Specifically, in the prior art, dual-band stacked ceramic antennas are active antennas. In this embodiment, the dual-band single-layer ceramic antenna 1 is configured as a combination of a passive antenna 11 and a bridge 12. This change not only significantly reduces antenna cost but also shortens the length of the IPEX coaxial cable, effectively reducing line loss and improving satellite signal transmission efficiency and stability. Passive antenna 11 receives dual-band satellite signals, which are then phase-adjusted by bridge 12 and transmitted via the IPEX coaxial cable to the dual-band receiving unit.

[0026] In an embodiment of the present invention, the dual-frequency positioning system further includes a central control board, on which the passive antenna 11, the bridge 12, and the dual-frequency receiving unit are all mounted. Placing the passive antenna 11 and the bridge 12 directly on the central control board reduces line losses, further reducing the cost of the dual-frequency positioning system.

[0027] Furthermore, the dual-frequency positioning system also includes a reflective circuit board, on which the passive antenna 11 and the bridge 12 are mounted, and which is then mounted on the central control board. Placing the passive antenna 11 and the bridge 12 on the reflective circuit board significantly increases the strength of received satellite signals. Furthermore, the reflective circuit board also blocks interference signals from the central control board, thereby improving the quality and stability of satellite signals.

[0028] like Figure 1 As shown, in an embodiment of the present invention, the dual-frequency receiving unit includes: a first filter 2, a first band path, a second band path, and a dual-frequency positioning module. The first filter 2 is electrically connected to the dual-frequency single-layer ceramic antenna 1. The two ends of the first band path are electrically connected to the first filter 2 and the dual-frequency positioning module, respectively. The two ends of the second band path are electrically connected to the first filter 2 and the dual-frequency positioning module, respectively.

[0029] Specifically, the first filter 2 is used to filter satellite signals in the first and second bands. The first band path is used to amplify and filter the satellite signals in the first band before transmitting them to the dual-frequency positioning module. Correspondingly, the second band path is used to amplify and filter the satellite signals in the second band before transmitting them to the dual-frequency positioning module.

[0030] Furthermore, if Figure 1 As shown, the first band path includes: a first low noise amplifier 31 and a second filter 32 . The first low noise amplifier 31 is electrically connected to the first filter 2 , and the second filter 32 is electrically connected to the first low noise amplifier 31 .

[0031] Specifically, after the dual-frequency signal is filtered by the first filter 2, the satellite signal of the first band is amplified by the first low-noise amplifier 31, filtered by the second filter 32, and then transmitted to the dual-frequency positioning module.

[0032] Correspondingly, the second band path includes: a second low noise amplifier 41 and a third filter 42 . The second low noise amplifier 41 is electrically connected to the first filter 2 , and the third filter 42 is electrically connected to the second low noise amplifier 41 .

[0033] Specifically, after the dual-frequency signal is filtered by the first filter 2, the satellite signal of the second band is amplified by the second low-noise amplifier 41, filtered by the third filter 42, and then transmitted to the dual-frequency positioning module.

[0034] Furthermore, in an embodiment of the present invention, the dual-frequency positioning module is an unpackaged structure to reduce the cost of packaging, thereby further reducing the cost of the dual-frequency positioning system.

[0035] like Figure 1 As shown, the dual-frequency positioning module includes a dual-frequency RTK positioning chip 51, an active crystal oscillator 52, and a resistor-capacitor-inductor (RCI) device 53. These components are all located on the central control board. The dual-frequency RTK positioning chip 51 is electrically connected to the second filter 32 and the third filter 42. The active crystal oscillator 52 and the RCI device 53 are also electrically connected to the dual-frequency RTK positioning chip 51.

[0036] In this embodiment, the dual-frequency positioning module is not packaged, and the dual-frequency RTK positioning chip 51, active crystal oscillator 52 and resistor-capacitor-inductor device 53 are directly set on the central control board, which can reduce the packaging links and additional components, significantly reduce the cost, and enhance the system integration and reliability.

[0037] The dual-frequency positioning system provided by the embodiment of the present invention reduces the complexity of the antenna and thus reduces the cost of the antenna by replacing the dual-frequency stacked ceramic antenna with a dual-frequency single-layer ceramic antenna; shortens the outgoing line length of the IPEX coaxial cable by setting the dual-frequency single-layer ceramic antenna as a passive antenna, effectively reduces line loss, and further reduces the cost of the dual-frequency positioning system; and reduces the packaging cost and additional components by not encapsulating the dual-frequency positioning module, thereby significantly reducing the cost of the dual-frequency positioning system and making it easier to promote and apply.

[0038] An embodiment of the present utility model further provides an electric vehicle, comprising a vehicle body and a dual-frequency positioning system. The dual-frequency positioning system is arranged on the vehicle body to provide navigation for the electric vehicle.

[0039] Specifically, in this embodiment, the dual-frequency positioning system includes a dual-frequency single-layer ceramic antenna 1 and a dual-frequency receiving unit. The dual-frequency single-layer ceramic antenna 1 has a first band and a second band, and the first band and the second band have different frequencies. The dual-frequency receiving unit is electrically connected to the dual-frequency single-layer ceramic antenna 1 and is used to receive and demodulate the signals from the dual-frequency single-layer ceramic antenna 1.

[0040] In this embodiment, the dual-frequency stacked ceramic antenna commonly used in the prior art is replaced with a dual-frequency single-layer ceramic antenna 1. In the dual-frequency single-layer ceramic antenna 1, the silver paste surface at the center is coupled with the first band, and the surrounding silver paste surfaces are coupled with the second band to meet the needs of dual-frequency positioning. By setting the dual-frequency stacked ceramic antenna as a dual-frequency single-layer ceramic antenna 1, the complexity of the antenna can be reduced, thereby reducing the cost of the antenna. In this embodiment, the dual-frequency single-layer ceramic antenna 1 has two bands, wherein the first band adopts the L1 band and the second band adopts the L5 band. The dual-frequency single-layer ceramic antenna 1 sends the received satellite signal to the dual-frequency receiving unit, and the dual-frequency receiving unit processes the received satellite signals of the two bands to enable the positioning system to locate and navigate more accurately. In this embodiment, the dual-frequency single-layer ceramic antenna 1 and the dual-frequency receiving unit are electrically connected via an IPEX coaxial cable.

[0041] Optionally, the electric vehicle can be a shared electric vehicle. By reducing the manufacturing cost of the dual-frequency positioning system, the manufacturing cost of the shared electric vehicle can be further reduced, thereby facilitating the widespread promotion and application of shared electric vehicles.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A dual-frequency positioning system, characterized in that: include: A dual-frequency single-layer ceramic antenna and a dual-frequency receiving unit, wherein the dual-frequency single-layer ceramic antenna has a first band and a second band, and the first band and the second band have different frequencies; The dual-frequency receiving unit is electrically connected to the dual-frequency single-layer ceramic antenna, and is used to receive and demodulate signals from the dual-frequency single-layer ceramic antenna.

2. The dual-frequency positioning system according to claim 1, characterized in that: The dual-band single-layer ceramic antenna includes: a passive antenna and an electric bridge, wherein the passive antenna is electrically connected to the electric bridge; The passive antenna has a silver paste surface, the center position of the silver paste surface is coupled to the first band, and the area outside the center position of the silver paste surface is coupled to the second band.

3. The dual-frequency positioning system according to claim 2, characterized in that: It also includes a central control board, on which the passive antenna, the electric bridge and the dual-frequency receiving unit are all arranged.

4. The dual-frequency positioning system according to claim 3, characterized in that: It also includes a reflective circuit board, the passive antenna and the electric bridge are arranged on the reflective circuit board, and the reflective circuit board is arranged on the central control board.

5. The dual-frequency positioning system according to claim 3, characterized in that: The dual-frequency receiving unit includes: a first filter, a first band path, a second band path and a dual-frequency positioning module; The first filter is electrically connected to the dual-frequency single-layer ceramic antenna, and both ends of the first band path are electrically connected to the first filter and the dual-frequency positioning module respectively; Two ends of the second band path are electrically connected to the first filter and the dual-frequency positioning module respectively.

6. The dual-frequency positioning system according to claim 5, characterized in that: The first band path includes: a first low noise amplifier and a second filter, the first low noise amplifier is electrically connected to the first filter, and the second filter is electrically connected to the first low noise amplifier and the dual-frequency positioning module.

7. The dual-frequency positioning system according to claim 5, characterized in that: The second band path includes: a second low noise amplifier and a third filter. The second low noise amplifier is electrically connected to the first filter. The third filter is electrically connected to the second low noise amplifier and the dual-frequency positioning module.

8. The dual-frequency positioning system according to claim 5, characterized in that: The dual-frequency positioning module is an unpackaged structure.

9. The dual-frequency positioning system according to claim 8, characterized in that: The dual-frequency positioning module includes: a dual-frequency RTK positioning chip, an active crystal oscillator and a resistor-capacitor-sensor device, and the dual-frequency RTK positioning chip, the active crystal oscillator and the resistor-capacitor-sensor device are all arranged on the central control board; The dual-frequency RTK positioning chip is electrically connected to the first band path and the second band path, and the active crystal oscillator and the resistance-capacitance-inductance device are both electrically connected to the dual-frequency RTK positioning chip.

10. An electric vehicle, characterized in that: The vehicle comprises a vehicle body and the dual-frequency positioning system according to any one of claims 1 to 9, wherein the dual-frequency positioning system is arranged on the vehicle body.

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