Equipment for real-time acquisition and calibration of satellite signals
By designing a device that includes a data processing module and a satellite signal transceiver module, and utilizing a high-performance transceiver and FPGA chip to process satellite signals, the problems of GPS signal loss and data tampering are solved, and accurate positioning and data calibration are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2026-04-03
AI Technical Summary
The GPS modules in existing vehicle driving recorders are easily affected by the external environment, resulting in signal loss, and the data is easily tampered with, making it impossible to accurately detect the trajectory and verify the authenticity of the recorded data.
Design a device that includes a data processing module, a satellite signal transceiver module, a FAKRA connector, and a USB connector. Utilize an AD9361 transceiver for distortion-free data sampling and FPGA chip processing, perform split mixing and filtering, and combine an FIR filter and unpacking module to achieve the acquisition and calibration of GPS and BeiDou baseband signals.
It improves the positioning accuracy of satellite signals, ensures the accuracy of data transmission, and enables the detection of the integrity of recording equipment and the authenticity of data during annual inspections, preventing tampering.
Smart Images
Figure CN224081815U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of communication equipment, specifically relating to a device for real-time acquisition and calibration of satellite signals. Background Technology
[0002] Satellite positioning equipment is an essential accessory for car dashcams, enabling them to accurately determine your current location in real time via satellite. Although existing vehicle dashcams also have GPS modules, in actual use, environmental factors such as cloud cover, tunnels, and insufficient signal coverage in remote areas can cause GPS signal loss, making evidence collection impossible. Furthermore, GPS data on the dashcam is easily tampered with, leading to falsified data transmission. Summary of the Invention
[0003] Purpose of the utility model: The technical problem to be solved by this utility model is to provide a device for real-time acquisition and calibration of satellite signals, which is used to detect whether the vehicle trajectory recording device has been replaced or whether the recorded data has been tampered with during annual inspection.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] A device for real-time acquisition and calibration of satellite signals includes a housing, and a data processing module, a satellite signal transceiver module, a FAKRA connector, and a USB connector, which are connected by circuitry within the housing; the satellite signal transceiver module is mounted on the bottom of the data processing module; the FAKRA connector and the USB connector are respectively located at both ends of the data processing module.
[0006] Furthermore, the data processing module includes a circuit board, a processing chip, a display screen, buttons, and clips; the processing chip and the display screen are respectively disposed on the upper surface of the circuit board; the buttons are a group disposed in the middle of the upper surface of the circuit board; the clips are located at the bottom of the circuit board, and the satellite signal transceiver module is installed at the bottom of the circuit board by means of clips and screws.
[0007] Specifically, the satellite signal transceiver module includes a transceiver circuit board for satellite signals, and a connector and screw holes disposed on the top of the transceiver circuit board; the connector engages with a snap fastener on the bottom of the circuit board, and the transceiver circuit board is fixed to the circuit board by a screw passing through the screw hole.
[0008] Furthermore, the transceiver board includes a satellite signal transmission link and a satellite signal reception link;
[0009] The receiving link uses the ADC of the transceiver AD9361 to perform lossless data sampling and then enters the FPGA chip to obtain positioning signal data. The data is then packaged into a specified data frame format by the Packet module and transmitted to the data center via Ethernet through the backplane.
[0010] The receiving link receives data from the baseboard, restores the positioning signal data through the depacket module, converts it into an analog signal through the DAC of the transceiver AD9361, and mixes it to the specified navigation frequency to realize signal restoration.
[0011] Furthermore, in the receiving link, the data entering the FPGA chip is divided into two paths, which are mixed and then filtered and extracted by an FIR filter to obtain the baseband signals of GPS and BeiDou.
[0012] In the receiving link, the baseband signals of GPS and BeiDou are restored by the depacket module. The baseband signals are then processed by interpolation, filtering, and baseband mixing to obtain the combined baseband signals of GPS and BeiDou.
[0013] Specifically, the housing includes an upper shell, a middle frame, and a lower cover; the middle frame surrounds the outside of the data processing module and encapsulates the data processing module through the upper shell and the lower cover; the middle frame is connected to the upper shell and the lower cover by plastic snap-fit and is fixed with screws.
[0014] Furthermore, the housing also includes a metal cover plate; the metal cover plate is fitted into the top perforated window of the upper housing, and the metal cover plate is fixed to the lower cover by screws around its perimeter.
[0015] Furthermore, the metal cover plate has a screen mounting window and a keycap mounting window; a screen protective plate is installed at the top of the screen mounting window; keycaps are installed at the keycap mounting window, and the keycaps are connected to a set of keys below them.
[0016] Furthermore, a wireless charging coil and a battery are provided inside the lower cover, and a magnetic shielding sheet is provided between the wireless charging coil and the battery. The battery is connected to the circuit board above through a circuit.
[0017] Furthermore, a mobile signal antenna and a wireless transmission antenna are also provided inside the lower cover. Beneficial effects
[0018] (1) This utility model device can use the same GPS antenna in the same location as the vehicle recorder to control the variables in the detection process, and the built-in network module of this handheld device can exchange data with the cloud data center and perform two-way verification, thereby accurately calibrating the GPS positioning. This device can be used during annual inspections to accurately detect whether the vehicle recorder has been replaced or whether the recorded data has been tampered with.
[0019] (2) The data entering the FPGA from the satellite signal transceiver module of this utility model is divided into two paths, which are mixed and then filtered and extracted by the FIR filter to obtain the baseband signals of GPS and Beidou, thereby reducing the data transmission bandwidth and improving the positioning accuracy. Attached Figure Description
[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.
[0021] Figure 1 This is an overall structural appearance drawing of the device of this utility model.
[0022] Figure 2 These are exploded images of the components of the device of this utility model.
[0023] Figure 3 This is a structural diagram of the data processing module in the device.
[0024] Figure 4 This is a schematic diagram of the satellite signal transceiver module.
[0025] Figure 5 This is a schematic diagram of the satellite signal transmission and reception links in the transceiver circuit board.
[0026] Figure 6 This is a circuit diagram of the receiving link in a satellite signal transceiver module.
[0027] Figure 7 This is a circuit diagram of the transmission link in the satellite signal transceiver module.
[0028] Figure 8 This is a schematic diagram of the metal cover plate.
[0029] The reference numerals in the attached figures represent:
[0030] 10-Housing; 20-Data processing module; 30-Satellite signal transceiver module; 40-FAKRA connector; 50-USB connector; 60-Magnetic shielding sheet; 70-Battery; 80-Mobile signal antenna; 90-Wireless transmission antenna;
[0031] 101-Top shell; 102-Middle frame; 103-Bottom cover; 104-Metal cover plate; 105-Screen mounting window; 106-Keycap mounting window; 107-Screen protective plate; 108-Keycap; 109-Wireless charging coil;
[0032] 201 - Circuit board; 202 - Processing chip; 203 - Display screen; 204 - Buttons; 205 - Clips;
[0033] 301 - Transceiver circuit board; 302 - Connector; 303 - Screw hole. Detailed Implementation
[0034] The present invention can be better understood from the following embodiments.
[0035] The structures, proportions, and sizes shown in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, terms such as "upper," "lower," "front," "rear," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.
[0036] like Figure 1 and Figure 2 As shown, the device for real-time acquisition and calibration of satellite signals according to this utility model includes a housing 10, and a data processing module 20, a satellite signal transceiver module 30, a FAKRA connector 40, and a USB connector 50, which are connected by circuitry within the housing; the satellite signal transceiver module 30 is installed at the bottom of the data processing module 20; the FAKRA connector 40 and the USB connector 50 are respectively located at both ends of the data processing module 20.
[0037] Among them, combined Figure 3 As shown, the data processing module 20 includes a circuit board 201, a processing chip 202, a display screen 203, buttons 204, and clips 205; the processing chip 202 and the display screen 203 are respectively disposed on the upper surface of the circuit board 201; the buttons 204 are a group and are disposed in the middle of the upper surface of the circuit board 201; the clips 205 are located at the bottom of the circuit board 201, and the satellite signal transceiver module 30 is installed at the bottom of the circuit board 201 by means of the clips 205 and screws.
[0038] like Figure 4 As shown, the satellite signal transceiver module 30 includes a transceiver circuit board 301 for satellite signals, and a connector 302 and a screw hole 303 disposed on the top of the transceiver circuit board 301; the connector 302 cooperates with the buckle 205 at the bottom of the circuit board 201, and the transceiver circuit board 301 is fixed to the circuit board 201 by a screw passing through the screw hole 303.
[0039] In this embodiment, the transceiver board 301 includes a satellite signal transmission link and a reception link, such as... Figure 5 As shown.
[0040] The receiving link receives satellite signals from the test field. These signals are then sampled without distortion by the ADC of the AD9361 transceiver (a high-performance, highly integrated RF Agile Transceiver™ for 3G and 4G base station applications) before entering the FPGA chip. To reduce data transmission bandwidth, the data entering the FPGA is split into two paths, each mixed and then filtered and decimated by an FIR filter to obtain the GPS and BeiDou baseband signals. The data is then packaged into a specified data frame format by the Packet module and transmitted to the data center via Ethernet through the backplane.
[0041] The transmission link is used to reconstruct satellite signals from the test range. The transmitter receives data from the baseboard and uses the depacket module to reconstruct the GPS and BeiDou baseband signals. The baseband signals are processed through interpolation, filtering, and baseband mixing to obtain the combined GPS and BeiDou baseband signals. Finally, the AD9361 transceiver's DAC converts the signals into analog signals and mixes them to the specified navigation frequency, thus achieving signal reconstruction.
[0042] In some embodiments, in the receiving link, the data entering the FPGA chip is divided into two paths, which are then mixed and filtered and extracted by an FIR filter to obtain the baseband signals of GPS and BeiDou.
[0043] In the receiving link, the baseband signals of GPS and BeiDou are restored by the depacket module. The baseband signals are then processed by interpolation, filtering, and baseband mixing to obtain the combined baseband signals of GPS and BeiDou.
[0044] Figure 6This is a circuit diagram of the receiving link in the satellite signal transceiver module. The receiving link receives satellite signals from the test field, performs distortion-free data sampling through the AD9361 ADC, and then sends the data to the FPGA chip. To reduce data transmission bandwidth, the data entering the FPGA is split into two paths, which are then mixed and filtered and decimated by an FIR filter to obtain the baseband signals of GPS and BeiDou. The data is then packaged into a specified data frame format by the Packet module and transmitted to the data center via Ethernet through the backplane.
[0045] Figure 7 This is a circuit diagram of the transmit link in the satellite signal transceiver module. The transmit link is used to reconstruct the satellite signals from the test range. The transmitter receives data from the baseboard and uses the depacket module to reconstruct the GPS and BeiDou baseband signals. The baseband signals undergo interpolation, filtering, and baseband mixing to obtain the combined GPS and BeiDou baseband signals. Finally, the AD9361's DAC converts these signals into analog signals, which are then mixed to the specified navigation frequency to achieve signal reconstruction.
[0046] In this embodiment, the housing 10 includes an upper shell 101, a middle frame 102, and a lower cover 103. The middle frame 102 surrounds the data processing module 20 and encapsulates the data processing module 20 through the upper shell 101 and the lower cover 103. The middle frame 102 is connected to the upper shell 101 and the lower cover 103 by plastic snap-fit and fixed with screws. The plastic walls of the middle frame 102, the upper shell 101, and the lower cover 103 have steps and limiting strips for limiting movement. Through holes are provided at both ends of the middle frame 102 for fixing the FAKRA connector and the USB-C connector.
[0047] In some embodiments, the housing 10 further includes a metal cover plate 104; the metal cover plate 104 is fitted into the top hollow window of the upper housing 101, and the metal cover plate 104 is fixed to the lower cover 103 by screws around its perimeter.
[0048] like Figure 8 As shown, the metal cover plate 104 has a screen mounting window 105 and a keycap mounting window 106; a screen protective plate 107 is installed on the top of the screen mounting window 105; a keycap 108 is installed at the keycap mounting window 106, and the keycap 108 is connected to a set of buttons 204 below.
[0049] In some embodiments, a wireless charging coil 109 and a battery 70 are disposed inside the lower cover 103, a magnetic shielding sheet 60 is disposed between the wireless charging coil 109 and the battery 70, and the battery 70 is connected to the circuit board 201 above it via a circuit.
[0050] In some embodiments, the lower cover 103 is further provided with a mobile signal antenna 80 and a wireless transmission antenna 90.
[0051] This device is used by traffic management departments for inspections. When a vehicle needs to be inspected, this device is placed near the vehicle's dashcam, using the same antenna in the same location to ensure consistency with the dashcam's usage scenario. The traffic management department assigns a test route to the driver, who drives on the designated route. After the test, the device uploads the GPS-detected route data to the cloud and compares it with the data from the vehicle's built-in dashcam to obtain a two-way inspection record, thus verifying whether the dashcam is functioning properly.
[0052] This utility model provides a concept and method for a device for real-time acquisition and calibration of satellite signals. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. All components not explicitly stated in this embodiment can be implemented using existing technology.
Claims
1. A device for real-time acquisition and calibration of satellite signals, characterized in that, The application relates to a satellite signal receiver, which comprises a shell (10) and a data processing module (20), a satellite signal transceiver module (30), a FAKRA connector (40) and a USB connector (50) which are connected by an electric circuit and arranged in the shell; the satellite signal transceiver module (30) is arranged at the bottom of the data processing module (20); the FAKRA connector (40) and the USB connector (50) are arranged at the two ends of the data processing module (20) respectively.
2. The apparatus for real-time acquisition and calibration of satellite signals according to claim 1, wherein, The data processing module (20) comprises a circuit board (201), a processing chip (202), a display screen (203), a key (204) and a buckle (205); the processing chip (202) and the display screen (203) are arranged on the upper surface of the circuit board (201); the key (204) is arranged on the middle part of the upper surface of the circuit board (201); the buckle (205) is arranged at the bottom of the circuit board (201), and the satellite signal transceiver module (30) is arranged at the bottom of the circuit board (201) through the buckle (205) and a screw.
3. The apparatus for real-time acquisition and calibration of satellite signals according to claim 2, wherein, The satellite signal transceiver module (30) comprises a transceiving circuit board (301) for satellite signals and a connector (302) and a screw hole (303) arranged at the top of the transceiving circuit board (301); the connector (302) is matched with the buckle (205) at the bottom of the circuit board (201), and the transceiving circuit board (301) and the circuit board (201) are fixed through the screw penetrating through the screw hole (303).
4. The apparatus for real-time acquisition and calibration of satellite signals according to claim 3, wherein, The transceiving circuit board (301) comprises a satellite signal transmitting link and a satellite signal receiving link.
5. The apparatus for real-time acquisition and calibration of satellite signals according to claim 4, wherein, In the receiving link, the data entering the FPGA chip is divided into two paths, is used for mixing and entering the FIR filter to realize filtering and extraction, and the baseband signals of GPS and Beidou are obtained.
6. The apparatus for real-time acquisition and calibration of satellite signals of claim 2, wherein, The shell (10) comprises an upper shell (101), a middle frame (102) and a lower cover (103); the middle frame (102) is surrounded outside the data processing module (20) and encapsulates the data processing module (20) through the upper shell (101) and the lower cover (103); the middle frame (102) is connected with the upper shell (101) and the lower cover (103) through a plastic buckle and is fixed through a screw.
7. The apparatus for real-time acquisition and calibration of satellite signals according to claim 6, wherein, The shell (10) further comprises a metal cover plate (104); the metal cover plate (104) is embedded in a hollow window at the top of the upper shell (101), and the metal cover plate (104) is fixed with the lower cover (103) through a screw around the metal cover plate (104).
8. The apparatus for real-time acquisition and calibration of satellite signals according to claim 7, wherein, A screen mounting window (105) and a key cap mounting window (106) are reserved on the metal cover plate (104); a screen protection plate (107) is arranged at the top of the screen mounting window (105); a key cap (108) is arranged at the key cap mounting window (106), and the key cap (108) is connected with a group of keys (204) below.
9. The apparatus for real-time acquisition and calibration of satellite signals of claim 6, wherein, The lower cover (103) is internally provided with a wireless charging coil (109) and a battery (70), a magnetic isolation sheet (60) is arranged between the wireless charging coil (109) and the battery (70), and the battery (70) is connected with the circuit board (201) above through a circuit.
10. The apparatus for real-time acquisition and calibration of satellite signals of claim 6, wherein, The lower cover (103) is further internally provided with a mobile signal antenna (80) and a wireless transmission antenna (90).