A radar turntable control mechanism

Abstract

The utility model discloses a radar turntable control mechanism, which relates to the field of turntable control technology, including a single-sided two-dimensional phased array radar, wherein a two-dimensional phased array antenna is arranged inside the single-sided two-dimensional phased array radar, wherein the two-dimensional phased array antenna signal is connected to an up / down frequency conversion module, wherein the up / down frequency conversion module signal is connected to a signal processing module, wherein a turntable is connected to the bottom of the single-sided two-dimensional phased array radar, wherein the signal processing module is electrically connected to an RS485 communication module, and wherein the signal processing module drives the turntable to rotate through the RS485 communication module. The utility model can realize 0~360° all-round and blind-angle-free monitoring of the surrounding environment, and it can ensure that no potential obstacles or targets are missed.

Description

Technical Field

[0001] The utility model relates to the technical field of radar turntable control, in particular to a radar turntable control mechanism. Background Art

[0002] As the country gradually opens up low-altitude airspace, drones have also gradually developed and are widely used in the fields of intelligent traffic monitoring, aerial imaging, etc., playing a positive role. Due to the lack of unified industry standards, a large number of drones are flying without supervision, which has become a prominent problem in air traffic control. Drones can appear from any direction in the air when flying, so the radar's ability to detect in all directions is of great significance for the monitoring of drones.

[0003] A Chinese patent with announcement number CN215526092U discloses a drive control system for an aircraft radar turntable. The technical solution disclosed in the patent document is as follows: the servo controller is connected to the servo valve, solenoid valve, rotary transformer, and Hall sensor respectively; the solenoid valve is connected to the conversion valve and the oil filter; the servo valve is connected to the conversion valve; the conversion valve is connected to the hydraulic motor; the hydraulic motor is connected to the primary reducer, the reduction box, and the rotary transformer in sequence; the Hall sensor is fixed to the reduction box; two oil replenishment valves are added between the conversion valve and the hydraulic motor, and the two oil replenishment valves are reversely connected to the return oil; two safety valves are added between the conversion valve and the hydraulic motor, one safety valve controls the hydraulic oil output from the conversion valve to the hydraulic motor, and the other safety valve controls the hydraulic oil output from the hydraulic motor to the conversion valve. In order to solve the problem that the existing mechanism cannot accurately control the uniform speed and fixed point of the radar turntable, the servo controller of the prior art is composed of a DSP module and an FPGA monitoring module, so as to ensure the safety of the system from one failure and have high reliability. The hydraulic motor adopts a radial piston design, and after the first-level deceleration of the planetary reducer and the second-level deceleration of the gearbox, it can achieve low-speed and high-torque output, compact structure and light weight; the rotary transformer adopts a dual-channel design with high precision, and through the hardware decoding of the servo controller, the speed and angle of the turntable can be accurately controlled. However, there is still a problem that the flying objects appearing in 0°~360° cannot be accurately scanned in the radar turntable control. Utility Model Content

[0004] The utility model aims to provide a radar turntable control mechanism to solve the problem that flying objects appearing in the range of 0° to 360° cannot be accurately scanned.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A radar turntable control mechanism comprises a single-sided two-dimensional phased array radar, wherein a two-dimensional phased array antenna is arranged inside the single-sided two-dimensional phased array radar, signals of the two-dimensional phased array antenna are connected to up and down frequency conversion modules, signals of the up and down frequency conversion modules are connected to signal processing modules, a turntable is connected to the bottom of the single-sided two-dimensional phased array radar, the signal processing module is electrically connected to an RS485 communication module, and the signal processing module drives the turntable to rotate through the RS485 communication module.

[0007] A further improvement of the technical solution of the utility model is that the single-sided two-dimensional phased array radar signal is connected to the display and control module, so as to facilitate the user to observe the collected data.

[0008] A further improvement of the technical solution of the utility model is that the chip used in the signal processing module is an FPGA chip, and the up-down frequency conversion module is composed of a frequency synthesizer and a mixer. Thus, the signal frequency can be flexibly adjusted.

[0009] A further improvement of the technical solution of the utility model is that the chip of the RS485 communication module adopts a MAX3485 chip.

[0010] A further improvement of the technical solution of the utility model is that the display and control module is composed of a display and a control interface, thereby providing intuitive information display for users.

[0011] A further improvement of the technical solution of the utility model is that the single-sided two-dimensional phased array radar is composed of an antenna and a T / R (transmit / receive) module.

[0012] A further improvement of the technical solution of the utility model is that the turntable is driven by a stepper motor. The stepper motor can achieve very precise position control through precise stepping control.

[0013] The utility model has the following beneficial effects: 1. Through the composition of a single-sided two-dimensional phased array radar and a turntable, the radar scanning area is controlled by the TWS mode. The scanning area is a set range, so as to achieve the range of radar detection, thereby automatically judging the working state of the control turntable, and adjusting the radar scanning speed according to different scene environments. The control command is sent through the RS485 communication module to accurately control the stepper motor of the turntable to move in the horizontal direction. The turntable drives the antenna to scan the azimuth of 0~360°, and can receive control signals to adjust the speed and rotation direction. The angular position information can be reported in real time, thereby realizing all-round and blind-angle-free monitoring of the surrounding environment from 0~360°, which is crucial for scenes with high safety requirements. It can ensure that no potential obstacles or targets are missed, and the position and direction of the target can be determined more accurately. Through 360° coverage, more data can be provided to calculate the precise position of the target, and the blind spots caused by the angle limitation of the sensor are avoided. Only detection within a specific angle range will lead to blind spots, making it impossible to detect targets outside the range, thereby increasing the risk.

[0014] 2. Through the two-dimensional phased array antenna and signal processing module, the two-dimensional phased array antenna transmits a linear frequency modulated pulse signal into the air. When the transmitting beam encounters a moving target and generates an echo, a frequency difference will be generated between the echo frequency and the transmitting signal frequency. When the radar is in the receiving state, the signal radiated from the two-dimensional phased array antenna surface encounters the target and is reflected back to the antenna surface. When the target is discovered by the two-dimensional phased array signal processing TWS technology, the RS485 communication module is used to control the scanning and stopping of the turntable, so that the phased array radar using TWS technology can give full play to the agile change capability of the phased array antenna beam, thereby improving the radar's detection performance and tracking continuity performance. The radar turntable mechanism is designed to be more compact, highly integrated, and low cost, to achieve monitoring of the entire airspace. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a principle block diagram of the single-sided two-dimensional phased array radar of the utility model;

[0016] Figure 2 This is a flow chart of controlling the turntable of the utility model. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] like Figure 1 As shown, a radar turntable control mechanism includes a single-sided two-dimensional phased array radar, a two-dimensional phased array antenna, an up and down frequency conversion module, a signal processing module, a display and control module, a turntable, and an RS485 communication module.

[0019] The radar first rotates the single-sided two-dimensional phased array radar through a turntable, and the two-dimensional phased array antenna transmits a linear frequency modulation pulse signal into the air. When the transmission beam encounters a moving target and generates an echo, the echo frequency and the transmission signal frequency will produce a frequency difference, that is, the Doppler frequency. When the radar is in the receiving state, the signal radiated by the two-dimensional phased array antenna array encounters the target and is reflected back to the antenna array. After passing through the up and down frequency conversion module, it is sent to the radar signal processing, the target information is parsed, and the terminal software processes the radar data and displays the processed target data on the software interface. The target is discovered through the two-dimensional phased array signal processing TWS technology, and the RS485 communication module is used to control the scanning and stopping of the turntable.

[0020] The signal processing module of the radar adopts Xilinx FPGA chip, which can complete the functions of receiving echo signal processing, collecting and feeding back the working status of the turntable, receiving and distributing control instructions, etc. At the same time, the radar signal processing module can also provide the current radar reception and transmission, turntable angle, and phased array antenna status to the display and control module. The operator can intuitively obtain the status information related to the radar and turntable on the display and control module.

[0021] The display and control module can realize data processing, display and control of radar results, and can set the working status of the receiving and sending, turntable and software of radar signal processing of single-sided two-dimensional phased array radar.

[0022] The signal processing module can control the working mode, working state, horizontal angle, and rotation speed of the turntable in real time. The radar scanning area can be controlled through the TWS mode. The scanning area is a set range and also the detection range of the radar, so that the working state of the turntable can be automatically determined and the radar scanning speed can be adjusted according to different scene environments. The process steps for controlling the rotation of the turntable are as follows:

[0023] Step 1: Turn on the radar and enter TWS mode 1. Use the turntable to rotate 360° for mechanical scanning. By configuring the phase and amplitude of all array elements, electronic scanning of the pitch area 0~N° is achieved.

[0024] Step 2: If there is a target, enter TWS mode 2, the turntable stops rotating, and the phase and amplitude of all array elements are configured with the target as the center to scan the range of -45°~45° in azimuth and 0~N° in pitch.

[0025] Step 3: If no target exists, the radar enters TWS Mode 1.

[0026] This enables all-round, 0~360° monitoring of the surrounding environment without blind spots, which is crucial for scenarios with high safety requirements. It ensures that no potential obstacles or targets are missed, and the position and direction of the target can be determined more accurately. Through 360° coverage, more data can be provided to calculate the precise position of the target, and blind spots caused by sensor angle limitations can be avoided.

[0027] In Example 1, the chip used in the signal processing module is an FPGA chip, the up and down frequency conversion module is composed of a frequency synthesizer and a mixer, the RS485 communication module uses a MAX3485 chip, the display and control module is composed of a display and a control interface, the two-dimensional phased array is composed of an antenna and a T / R (transmit / receive) module, the turntable is driven by a stepper motor, and the turntable interacts with the signal processing module through the RS485 communication module, receives the turntable control command of the signal processing module, and outputs the current angle information.

[0028] Furthermore, the radar turntable control mechanism of the utility model adopts TWS to control the turntable, which can accurately judge the state, and the detection performance can well search for targets and control the turntable. It has the characteristics of rich equipment interfaces and stable performance, easy installation, and reduces the overall cost of the module. The turntable part can control the working mode of the turntable in real time, and can adjust the radar scanning speed according to different scene environments, and scan and stop the turntable at the same time. According to the two TWS modes in the signal processing board, the stepper motor of the turntable is precisely controlled by the RS485 communication module and moves in the horizontal direction, so that the entire airspace can be monitored, which greatly improves the working ability and work efficiency of the radar. At the same time, it has the function of whole machine status monitoring, which can quickly locate and troubleshoot faults.

[0029] The advantages of the utility model are: 1) It can realize 0~360° all-round monitoring of the surrounding environment without blind spots, which can ensure that no potential obstacles or targets are missed. 2) The signal radiated by the two-dimensional phased array antenna array is reflected back to the antenna array after encountering the target, and is sent to the radar signal processing module for signal processing after passing through the up and down frequency conversion module, and the target information is parsed. The radar data is processed through the terminal software, and the processed target data is displayed on the software interface. 3) It can complete the functions of receiving echo signal processing, collecting and feedback of the turntable working status, and receiving and distributing control instructions. At the same time, the radar signal processing module can also send the current radar transceiver, turntable angle, and phased array antenna status to the display and control module. The operator can intuitively obtain the status information related to the radar and turntable on the display and control module. 4) The single-sided two-dimensional phased array radar signal processing can be set for transceiver, turntable and the working status of the software itself. 5) The working mode, working status, horizontal angle, and rotation speed of the turntable can be controlled. The radar scanning area can be controlled through the TWS mode. The scanning area can be a set range or a radar detection range. The working status of the turntable can be automatically determined and controlled, and the radar scanning speed can be adjusted according to different scene environments.

[0030] Those skilled in the art should be aware that the protection scheme of the present utility model is not limited to the above-mentioned embodiments, and various arrangements, combinations and transformations can be made on the basis of the above-mentioned embodiments. Without violating the spirit of the present utility model, various transformations of the present utility model fall within the protection scope of the present utility model.

Claims

1. A radar turntable control mechanism, comprising a single-sided two-dimensional phased array radar, characterized in that: A two-dimensional phased array antenna is arranged inside the single-sided two-dimensional phased array radar, the two-dimensional phased array antenna signal is connected to the up and down frequency conversion module, the up and down frequency conversion module signal is connected to the signal processing module, a turntable is connected to the bottom of the single-sided two-dimensional phased array radar, the signal processing module is electrically connected to the RS485 communication module, and the signal processing module drives the turntable to rotate through the RS485 communication module.

2. A radar turntable control mechanism according to claim 1, characterized in that: The single-sided two-dimensional phased array radar signal is connected to the display and control module.

3. A radar turntable control mechanism according to claim 1, characterized in that: The chip used in the signal processing module is an FPGA chip, and the up-down frequency conversion module is composed of a frequency synthesizer and a mixer.

4. A radar turntable control mechanism according to claim 1, characterized in that: The chip of the RS485 communication module adopts the MAX3485 chip.

5. A radar turntable control mechanism according to claim 2, characterized in that: The display and control module consists of a display and a control interface.

6. A radar turntable control mechanism according to claim 1, characterized in that: The single-sided two-dimensional phased array radar consists of an antenna and a T / R module.

7. A radar turntable control mechanism according to claim 1, characterized in that: The turntable is driven by a stepping motor.

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