Radar acquisition system and method
By integrating the phase-locked loop, signal transceiver module and signal processing module into a single PCB board, the problem of large size and poor stability of the split radar acquisition system is solved, and volume reduction, stability improvement and power consumption reduction are achieved, and the complex marine environment is adapted to.
Patent Information
- Application Number
- CN202510576096.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2025-07-04
AI Technical Summary
The existing split radar acquisition system is large in size and occupies a large amount of cabin space, which is not conducive to the deployment of the ship's narrow environment, and has poor stability and environmental adaptability.
The phase-locked loop, signal transceiver module and signal processing module are integrated on a single PCB board to form an integrated radar acquisition system, including SAW resonant circuit, DDS chip, phase-locked loop, low-noise amplifier, analog-to-digital converter and FPGA, to realize integrated signal processing.
The overall volume of the radar acquisition system is reduced to 1/3 of the existing solution, the system stability and environmental adaptability are improved, the power consumption is reduced to one-half of the existing solution, and adapted to high humidity and salt spray environments.
Smart Images
Figure CN120254766A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of ship navigation, and particularly to a radar acquisition system and method. Background Art
[0002] The radar acquisition system on a ship is a core component of ship navigation and safety. By real-time detection, data processing, and intelligent early warning, it helps crew members cope with complex marine environments and reduce the risk of human operation, and is an indispensable part of navigation technology.
[0003] Currently, the existing navigation radar acquisition systems usually adopt a split design, including multiple circuit boards such as an independent frequency synthesizer module, a transmitter, a receiver, and a signal processor. Complex cables are usually used to connect between each module.
[0004] However, the existing radar acquisition systems with split design usually have a large volume. The stacking of multiple module circuit boards will occupy a large amount of space in the cabin, which is not conducive to the deployment in the narrow environment of the ship, thus restricting the overall layout of the ship. Summary of the Invention
[0005] In order to help solve the problem that the radar acquisition system with split design usually has a large volume, and the stacking of multiple module circuit boards will occupy a large amount of space in the cabin, which is not conducive to the deployment in the narrow environment of the ship, this application provides a radar acquisition system and method.
[0006] In a first aspect, this application provides a radar acquisition system, adopting the following technical solution: a high-frequency signal generation module, a signal transceiver integrated module, and a digital signal processing module;
[0007] The high-frequency signal generation module is used to generate a reference signal and generate a radio frequency signal according to the reference signal;
[0008] The signal transceiver integrated module is communicatively connected to the high-frequency signal generation module, and is used to receive the radio frequency signal, complete the reception of the echo signal after the transmission and reflection of the radio frequency signal, and generate an intermediate frequency signal according to the radio frequency signal and the echo signal;
[0009] The digital signal processing module is communicatively connected to the signal transceiver integrated module, and is used to receive the intermediate frequency signal and extract the target parameters to be processed according to the intermediate frequency signal.
[0010] In a specific feasible implementation, the high-frequency signal generation module includes a SAW resonance circuit, a DDS chip, and a phase-locked loop;
[0011] The SAW resonance circuit is used to generate a reference signal;
[0012] The DDS chip is communicatively connected to the SAW resonant circuit, and is configured to receive the reference signal and generate a reference signal for the phase-locked loop;
[0013] The phase-locked loop is communicatively connected to the DDS chip, and is configured to receive the reference signal and generate a radio frequency signal based on the reference signal.
[0014] In a specific feasible implementation, the signal transceiver integrated module includes a transmitting link, a transmitting antenna, a receiving antenna, a receiving link, and a mixer;
[0015] The transmitting link is communicatively connected to the high-frequency signal generation module, and is configured to receive the radio frequency signal, amplify and filter the radio frequency signal, and generate an amplified radio frequency signal;
[0016] The transmitting antenna is communicatively connected to the transmitting link, and is configured to transmit the amplified radio frequency signal to the target surface;
[0017] The receiving antenna is configured to receive the echo signal reflected by the target surface;
[0018] The receiving link is communicatively connected to the receiving antenna, and is configured to receive the echo signal, amplify and filter the echo signal, and generate an amplified echo signal;
[0019] The mixer is communicatively connected to the transmitting link and the receiving link, and is configured to receive the amplified radio frequency signal and the amplified echo signal, and mix the amplified radio frequency signal and the amplified echo signal to generate an intermediate frequency signal.
[0020] In a specific feasible implementation, the low-noise amplifiers are used for the transmitting link and the receiving link.
[0021] In a specific feasible implementation, the digital signal processing module includes an analog-to-digital converter and an FPGA;
[0022] The analog-to-digital converter is communicatively connected to the signal transceiver integrated module, and is configured to receive the intermediate frequency signal and convert the intermediate frequency signal into a corresponding digital signal;
[0023] The FPGA is communicatively connected to the analog-to-digital converter, and is configured to receive the converted digital signal, and extract target parameters to be processed through a target detection algorithm based on the digital signal.
[0024] In a specific feasible implementation, the frequency range of the radio frequency signal is 9.3 GHz to 9.5 GHz.
[0025] In a specific feasible implementation, the frequency of the reference signal is 1 GHz; the frequency of the reference signal of the phase-locked loop is 65 MHz.
[0026] In a specific feasible implementation, the transmission power of the radio frequency amplified signal is 23 dbm.
[0027] In a second aspect, the present application provides a radar acquisition method, adopting the following technical solution: The method is applied to a radar acquisition system, and the method includes:
[0028] Generate an original reference signal through a SAW resonance circuit, and generate a reference signal according to the reference signal;
[0029] Generate a radio frequency signal through a phase-locked loop according to the reference signal, and transmit the radio frequency signal to the target surface;
[0030] When receiving the echo signal reflected from the target surface, mix the radio frequency signal and the echo signal to generate an intermediate frequency signal;
[0031] According to the intermediate frequency signal, adopt a target detection algorithm to extract the target parameters in the intermediate frequency signal.
[0032] In a specific feasible implementation, the extracting the target parameters in the intermediate frequency signal according to the intermediate frequency signal by adopting a target detection algorithm includes:
[0033] Convert the intermediate frequency signal into a corresponding digital signal;
[0034] Adopt the target detection algorithm to extract the target parameters in the digital signal.
[0035] In summary, the present application has the following beneficial technical effects:
[0036] 1. By integrating the phase-locked loop (PLL) loop, the signal transceiver module, and the signal processing module, the overall volume of the radar acquisition system is reduced, and the volume can be reduced to 1 / 3 of the existing solution, which is beneficial to the overall layout of the ship environment;
[0037] 2. Through the integrated system design, 70% of the external interfaces can be reduced, avoiding the noise and signal attenuation introduced by multi-level interfaces, thereby improving the stability of the system;
[0038] 3. The integrated design can improve the adaptability of the system in different environments and can adapt to high humidity and salt spray environments;
[0039] 4. Reduce power consumption, and the power consumption can be reduced to one-half of the existing solution to optimize energy efficiency. Description of the Drawings
[0040] Figure 1 It is a schematic diagram of the radar acquisition system in the embodiments of the present application;
[0041] Figure 2 It is a flowchart of the radar acquisition method in the embodiments of the present application. Specific Embodiments
[0042] The following Figure 1 - Figure 2 further describes the present application in detail.
[0043] The embodiments of the present application disclose a radar acquisition system. This radar acquisition system integrates three major modules, namely a phase-locked loop system (i.e., a frequency synthesis module), a signal transceiver module, and a signal processing module, on a single PCB board, thereby reducing the overall volume of the radar acquisition system and being conducive to the overall layout of the ship.
[0044] The radar acquisition system on a ship is a core component of ship navigation and safety. By real-time detection, data processing, and intelligent early warning, it helps the crew to cope with complex marine environments and reduce the risk of human operation, and is an essential part of navigation technology. Currently, the existing navigation radar acquisition systems usually adopt a split design, including multiple boards such as an independent frequency synthesis module, a transmitter, a receiver, and a signal processor, and complex cables are usually used to connect between the various modules.
[0045] However, the existing radar acquisition systems with a split design are usually large in volume. The stacking of multiple module boards will occupy a large amount of space in the cabin, which is not conducive to the deployment in the narrow environment of the ship, resulting in limited overall layout of the ship. Moreover, discrete devices have insufficient anti-vibration and temperature drift capabilities and are difficult to meet the requirements of marine working conditions, resulting in poor environmental adaptability of the radar acquisition system. Secondly, long-distance signal transmission is vulnerable to electromagnetic interference, and multi-stage interfaces introduce noise and signal attenuation, resulting in poor stability of the radar acquisition system. In addition, the decentralized architecture requires independent debugging and maintenance, and the complexity of fault troubleshooting is high, which may lead to an increase in the maintenance cost of the system. Therefore, in order to help optimize the overall design of the radar acquisition system, make the radar acquisition system better adapt to the overall layout of the ship, and improve the performance of the radar acquisition system, the present application provides a radar acquisition system.
[0046] Referring to Figure 1 , the radar acquisition system includes a high-frequency signal generation module 101, a signal transceiver integrated module 102, and a digital signal processing module 103.
[0047] The high-frequency signal generation module 101 is used to generate a reference signal and generate a radio frequency signal based on the reference signal, so as to generate a highly stable radar carrier signal. The signal transceiver integrated module 120 is communicatively connected to the high-frequency signal generation module 101, and is used to receive the radio frequency signal, complete the transmission of the radio frequency signal and the reception of the echo signal after reflection, and generate an intermediate frequency signal according to the radio frequency signal and the echo signal. The digital signal processing module 103 is communicatively connected to the signal transceiver integrated module 102, and is used to receive the intermediate frequency signal and extract the target parameters to be processed according to the intermediate frequency signal.
[0048] The high-frequency signal generation module 101 includes a SAW resonance circuit, a DDS chip, and a phase-locked loop. The SAW resonance circuit is used to generate a reference signal. Specifically, the SAW resonance circuit generates a 1 GHz reference signal through fifth-harmonic amplification, combined with a local oscillator and mixing. The DDS chip is communicatively connected to the SAW resonance circuit and is used to receive the reference signal and generate a reference signal for the phase-locked loop. Specifically, the DDS chip directly performs digital frequency synthesis to generate a reference signal for the phase-locked loop (PLL). Among them, the frequency of the reference signal is about 65 MHz, and the model of the DDS chip is AD9910. The phase-locked loop (PLL) is communicatively connected to the DDS chip and is used to receive the reference signal and generate a radio frequency signal according to the reference signal. Specifically, the PLL loop includes devices such as a phase detector (ADF4002), a VCO (HMC429), and a mixer (HMC213). The reference signal passes through the PLL loop and generates a radio frequency signal of 9.3 GHz to 9.5 GHz through frequency multiplication.
[0049] The signal transceiver integrated module 102 includes a transmitting link, a transmitting antenna, a receiving antenna, a receiving link, and a mixer. The transmitting link is communicatively connected to the high-frequency signal generation module, and is configured to receive a radio frequency signal, and perform amplification and filtering processing on the radio frequency signal to generate a radio frequency amplified signal. Specifically, the transmitting link uses a low-noise amplifier (LAN), and through the cascaded amplification of the low-noise amplifier, the signal power is amplified, and the transmitting power of the radio frequency signal is increased to 23 dbm. The transmitting antenna is communicatively connected to the transmitting link, and is configured to transmit the radio frequency amplified signal to the target surface. The receiving antenna is configured to receive the echo signal reflected by the target surface. Specifically, after the transmitted radio frequency amplified signal is reflected by the target object, the receiving antenna captures the echo signal. The receiving link is communicatively connected to the receiving antenna, and is configured to receive the echo signal, and perform amplification and filtering processing on the echo signal to generate an echo amplified signal. Specifically, the receiving link uses a low-noise amplifier (LAN), and through the cascaded amplification of the low-noise amplifier, the echo signal is amplified. The mixer is communicatively connected to the transmitting link and the receiving link, and is configured to receive the radio frequency amplified signal and the echo amplified signal, and perform mixing processing on the radio frequency amplified signal and the echo amplified signal to generate an intermediate frequency signal. Considering that the signal frequency that can be detected by the analog-to-digital converter (ADC) is limited, and the high-frequency signal ADC is difficult to detect, therefore, the high-frequency signal needs to be converted into a low-frequency signal before it can be transmitted to the ADC for processing. Since both the radio frequency signal and the echo signal are high-frequency signals and are difficult for the ADC to process, the radio frequency signal and the echo signal are converted into intermediate frequency signals through the mixer, so as to facilitate the subsequent signal processing by the ADC.
[0050] The digital signal processing module 103 includes an analog-to-digital converter and an FPGA. The analog-to-digital converter is communicatively connected to the signal transceiver integrated module, and is configured to receive the intermediate frequency signal and convert the intermediate frequency signal into a corresponding digital signal. The FPGA is communicatively connected to the analog-to-digital converter, and is configured to receive the converted digital signal, and extract the target parameters to be processed through the target detection algorithm according to the digital signal, where the target parameters can be speed, distance, azimuth, etc. After obtaining the corresponding target parameters, they can be uploaded to the display and control terminal through Ethernet. Among them, the FPGA supports algorithm dynamic loading and can adapt to the requirements of multiple scenarios such as collision avoidance and meteorology.
[0051] It should be noted that in actual applications, the phase-locked loop, the signal transceiver module, and the signal processing module are integrated on a 6-layer PCB, and the size of the PCB ≤ 300 mm × 150 mm. The radar acquisition system includes a power supply design and a heat dissipation design. The distributed power management can control the voltage ripple of the core components within ±2%, and the design of the metal substrate heat conduction combined with the heat dissipation fins enables the system operating temperature range to be -40°C to +70°C.
[0052] Refer to Figure 1, in the embodiment of the present application, the signal flow is as follows: First, a reference signal is generated by a SAW resonance circuit. The reference signal is input to a DDS chip after amplification and filtering, and a reference signal of the PLL is generated through digital frequency synthesis. After the reference signal enters the PLL loop, a radio frequency signal of 9.3 GHz to 9.5 GHz is output. The radio frequency signal is amplified and filtered by a low-noise amplifier and then output through a transmitting antenna to be transmitted to a target object. At the same time, the radio frequency signal is coupled as the local oscillator signal of the receiver and transmitted to a mixer. The target object reflects the signal, which is captured by the receiving antenna to obtain an echo signal. After being amplified and filtered by the low-noise amplifier, the radio frequency amplified signal and the echo amplified signal are input to the mixer for mixing processing to generate an intermediate frequency signal. Among them, the low-noise amplifier can improve the receiving sensitivity. The intermediate frequency signal is transmitted to an ADC to be converted into a corresponding digital signal. Finally, the converted digital signal is transmitted to an FPGA for algorithm processing of target detection, so as to extract target parameters to be processed, which can be parameters such as speed, distance, and azimuth.
[0053] In this solution, by integrating the phase-locked loop (PLL) loop, the signal transceiver module, and the signal processing module, the overall volume of the radar acquisition system can be reduced, and the volume can be reduced to 1 / 3 of the existing solution, which is beneficial to the overall layout of the ship environment. At the same time, through the integrated system design, 70% of the external interfaces can be reduced, avoiding the noise and signal attenuation introduced by multiple interfaces, thereby improving the stability of the system. In addition, the integrated design can improve the adaptability of the system in different environments and can adapt to high-humidity and salt-fog environments. Moreover, the power consumption can be reduced, and the power consumption can be reduced to one-half of the existing solution to optimize the energy efficiency.
[0054] Based on the above system, the embodiment of the present application also discloses a radar acquisition method.
[0055] Refer to Figure 2 , the method includes the following steps:
[0056] S10, generate an original reference signal through a SAW resonance circuit and generate a reference signal according to the reference signal.
[0057] Specifically, a reference signal is generated through a SAW resonance circuit. The frequency of the reference signal is 1 GHz. The reference signal is transmitted to a DDS chip, and a reference signal of the phase-locked loop (PLL) is generated through digital frequency synthesis. The frequency of the reference signal of the phase-locked loop (PLL) is 65 MHz.
[0058] S20, generate a radio frequency signal through a phase-locked loop according to the reference signal and transmit the radio frequency signal to the target surface.
[0059] Specifically, the phase-locked loop generates a radio frequency signal in the range of 9.3 GHz to 9.5 GHz based on a reference signal. After cascaded amplification by a low-noise amplifier, the transmission power is increased to 23 dbm and transmitted to the target object through a transmitting antenna.
[0060] S30, when receiving the echo signal reflected back from the target surface, mix the radio frequency signal and the echo signal to generate an intermediate frequency signal.
[0061] Specifically, after being reflected by the target object, the radio frequency signal is captured by the receiving antenna. When receiving the echo signal reflected back from the target surface, after amplification and filtering by a low-noise amplifier, mix the echo signal with the signal coupled from the transmitting signal to obtain an intermediate frequency signal.
[0062] S40, according to the intermediate frequency signal, adopt a target detection algorithm to extract the target parameters in the intermediate frequency signal.
[0063] Specifically, first convert the intermediate frequency signal into a corresponding digital signal, and then adopt a target detection algorithm to extract the target parameters in the digital signal. Among them, the target parameters can be parameters such as the speed, distance, and azimuth of the target object.
[0064] In the solution of this application, by integrating modules, the system volume is reduced. At the same time, in practical applications, the local oscillator signal is shared through time-division multiplexing technology to reduce phase noise; and the algorithm of the FPGA can be dynamically loaded and can adapt to various application scenarios, thereby improving the performance of the radar acquisition system.
[0065] Figure 2 It is a schematic flowchart of the radar acquisition method in an embodiment. It should be understood that although Figure 2 the steps in the flowchart are displayed in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows; unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders; and Figure 2 at least a part of the steps in
[0066] may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least a part of other steps or sub-steps or stages of other steps. This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.
Claims
1. A radar acquisition system, characterized in that: The system includes: a high-frequency signal generation module, a signal transceiver integrated module, and a digital signal processing module; The high-frequency signal generation module is used to generate a reference signal and generate a radio frequency signal according to the reference signal; The signal transceiver integrated module is communicatively connected to the high-frequency signal generation module, and is used to receive the radio frequency signal, complete the reception of the echo signal after the transmission and reflection of the radio frequency signal, and generate an intermediate frequency signal according to the radio frequency signal and the echo signal; The digital signal processing module is communicatively connected to the signal transceiver integrated module, and is used to receive the intermediate frequency signal and extract target parameters to be processed according to the intermediate frequency signal.
2. The radar acquisition system according to claim 1, wherein: The high-frequency signal generation module includes a SAW resonance circuit, a DDS chip, and a phase-locked loop; The SAW resonance circuit is used to generate a reference signal; The DDS chip is communicatively connected to the SAW resonance circuit, and is used to receive the reference signal and generate a reference signal for the phase-locked loop; The phase-locked loop is communicatively connected to the DDS chip, and is used to receive the reference signal and generate a radio frequency signal according to the reference signal.
3. The radar acquisition system according to claim 1, characterized in that: The signal transceiver integrated module includes a transmitting link, a transmitting antenna, a receiving antenna, a receiving link, and a mixer; The transmitting link is communicatively connected to the high-frequency signal generation module, and is used to receive the radio frequency signal, amplify and filter the radio frequency signal, and generate a radio frequency amplified signal; The transmitting antenna is communicatively connected to the transmitting link, and is used to transmit the radio frequency amplified signal to the target surface; The receiving antenna is used to receive the echo signal reflected by the target surface; The receiving link is communicatively connected to the receiving antenna, and is used to receive the echo signal, amplify and filter the echo signal, and generate an echo amplified signal; The mixer is communicatively connected to the transmitting link and the receiving link, and is used to receive the radio frequency amplified signal and the echo amplified signal, and perform mixing processing on the radio frequency amplified signal and the echo amplified signal to generate an intermediate frequency signal.
4. The radar acquisition system according to claim 3, characterized in that: The low-noise amplifiers are used in the transmitting link and the receiving link.
5. The radar acquisition system according to claim 1, characterized in that: The digital signal processing module includes an analog-to-digital converter and an FPGA; The analog-to-digital converter is communicatively connected to the signal transceiver integrated module, and is used to receive the intermediate frequency signal and convert the intermediate frequency signal into a corresponding digital signal; The FPGA is communicatively connected to the analog-to-digital converter, and is used to receive the converted digital signal and extract target parameters to be processed through a target detection algorithm according to the digital signal.
6. The radar acquisition system according to claim 1, characterized in that: The frequency range of the radio frequency signal is 9.3 GHz to 9.5 GHz.
7. The radar acquisition system according to claim 2, characterized in that: The frequency of the reference signal is 1 GHz; the frequency of the reference signal of the phase-locked loop is 65 MHz.
8. The radar acquisition system according to claim 3, characterized in that: The transmission power of the radio frequency amplified signal is 23 dbm.
9. A radar acquisition method, characterized in that: The method is applied to a radar acquisition system, and the method includes: Generating an original reference signal through a SAW resonance circuit and generating a reference signal according to the reference signal; Generating a radio frequency signal through a phase-locked loop according to the reference signal and transmitting the radio frequency signal to the target surface; When receiving the echo signal reflected from the target surface, mixing the radio frequency signal and the echo signal to generate an intermediate frequency signal; According to the intermediate frequency signal, using a target detection algorithm to extract target parameters in the intermediate frequency signal.
10. The method according to claim 9, characterized in that: The extracting target parameters in the intermediate frequency signal according to the intermediate frequency signal by using a target detection algorithm includes: Converting the intermediate frequency signal into a corresponding digital signal; Using the target detection algorithm to extract the target parameters in the digital signal.