Mmw radar solution for terrain awareness in UAVs ("1+2" solution) Aimed at the flight environment of plant protection UAVs, Nanoradar has launched a millimeter-wave radar solution for terrain awareness in unmanned aerial vehicle ("1 +2" solution). It adopts one NRA24 altimeter radar sensor and two SP25T radar sensors for obstacle avoidance, with the advantages of high integration, anti-interference, good stability, long distance measurement, accurate height measurement, small size, light weight, easy to install and all-day and all-weather working. Performance characteristics for "1+2"solution Electrical performance for "1+2" system Working voltage Power consumption Refresh rate Modulation mode Work frequency 5~32VDC 6W@12VDC 50Hz FMCW 24.00~24.20GHz Working temperature -40~+85 Storage temperature -60~+125 Detection performance Forward/backward side Altimeter Detected 20m 30m Range accuracy 0.1m 0.02m horizontal 56 28 5 Single target
System composition System block diagram is as shown above. The data fusion module utilizes SPI interface to read forward and backward detection radar SP25T and the altimeter NRA24 and realizes the data fusion, and then through the UART, CAN interface to transmit the data to the UAV flight control system. Also users can directly connect SP25T and NRA24 radar for data collection and integration. "1 + 2"solution adopts 1 NRA24 mmw radar sensor and 2 SP25T mmw radar sensors developed by Nanoradar. Based on this solution, UAV customers can quickly build their own flight platform, and design different UAV-aware system suitable for their application scenarios. Installation Millimeter-wave terrain-awareness radar in UAVs adopts standard modular for the distributed installation, which is easy to assemble around the body of the UAV. The installation diagram is as shown below.
SP25T specifications Parameters Conditions Minimum value Typical value Maximum value Unit Transmitted power(eirp) Output adjustable System characteristics 20 dbm Refresh rate 30 Hz Power consumption Velocity-measurement accuracy Velocity-measurement accuracy @5V DC 25 1.20 1.32 1.45 W and velocity-measurement performance @0 dbsm 0.1 40 m -70 70 m/s Multi-target tracking characteristics ±0.1 m ±1.2 m/s 5 pcs Range resolution 0.75 m Velocity resolution 2.4 m/s Beam width horizontal Antenna performances 56 deg 37 deg
Sidelobe level vertical horizontal vertical Other characteristics -22 db -16 db Working voltage 5 12 32 V Working current @12V/25 100 110 120 ma Weight 9( excl. the shell ) g NRA24 specifications Parameters Conditions Minimum value Transmitted power (EIRP) System characteristics Typical value Maximum value Unit Output adjustable 13 24 dbm Refresh rate 50 Hz Power consumption @5V DC 25 1.4 1.6 1.8 W Accuracy performance @0 dbsm 0.1 50 m Multi-target tracking characteristics ±0.02 m 1 pcs Range resolution 0.75 m Beam width/tx Beam width/rx horizontal vertical horizontal vertical Antenna performances 28 deg 18 deg 27 deg 17 deg
Other characteristics Working voltage 4 5 6 V Working current @5V/25 320 350 380 ma Weight 22(excl. the shell) Dimension 92x63x6(L*W*H) mm g