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NRA24 millimeter wave radar

User manual

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With check sum

)

Hunan Nanoradar Science and Technology Co., Ltd.

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Summary of Contents for NRA24

Page 1: ...NRA24 millimeter wave radar User manual With check sum Hunan Nanoradar Science and Technology Co Ltd ...

Page 2: ... accepted the content of this manual Please strictly follow the manual to install and use the product Any improper use may cause damage or injury and Nanoradar would not bear the corresponding loss and liability Product copyright is retained by Nanoradar Reproduction in any form shall not be done without permission The use of this product and manual shall not be pursued liability for the patent Ve...

Page 3: ... NRA24 configuration Sensor Configuration 5 5 2 NRA24 back Sensor Back 6 5 3 NRA24 system status Sensor Status 7 5 4 Targets output status Target Status 8 5 5 Target output information Target Info 8 6 Data parsing examples 10 7 Electrostatic protection 11 7 1 Electrostatic protection measures 11 7 2 Identification of electrostatic damages 11 8 Frequently asked questions FAQ 11 9 References 12 ...

Page 4: ...rformance which satisfies the application requirements in unmanned aircraft system UAS helicopters small airships and other field Dimensions 130 70 14 5 mm Weight 66g excluding line Figure 1 NRA24 outlook 2 Matters needing attention in use Much attention should be paid to the matters needing attention 1 The power pins shall be connected separately to 5 20V DC stabilized power supply 2 Fix the NRA2...

Page 5: ...3 TTL USART_RX white 0 3 3V DC 4 TTL USART_TX yellow 0 3 3V DC 4 2 Test and use NRA24 sensor data can be acquired and parsed by the MMW Radar general Management Tool testing software which is used to visually display the observation results The tool is helpful in the use of NRA24 sensor Fast debugging is UART interface debugging method First of all the millimeter wave radar general management tool...

Page 6: ...ply will result in the appearance of a number of fixed interference frequency components in the spectrum during the algorithm analysis which would have an impact on test results and result in the continuous target output in a certain fixed distance The TX and RX pins of the USB to TTL adapter need to be cross connected to the TX and RX pins of the NRA24 sensor 3 USB serial port adapter is connecte...

Page 7: ...th a default transmission rate of 115200 baud 8 bit data bit 1 stop bit no parity bit no flow control Starting with a start sequence and terminating with a termination sequence for each data message At each data cycle of NRA24 20ms the message for NRA24 system status and target output status would be output If the field of detected target numbers in message of the detected target output status is ...

Page 8: ...t Table 4 Definition of Message ID Num Message ID Message Name Comment 1 0x200 Sensor Configuration NRA24configuration 2 0x400 Sensor Back NRA24 back 3 0x60A Sensor Status NRA24 status 4 0x70B Target Status Target output status 5 0x70C Target Info Target output information Note The Message ID is represented by 2 bytes Byte2 is the low byte and Byte3 is the high byte For example the output of the N...

Page 9: ...t is meaningless If the R W are 1 that is writing parameters Parameter is defined according to DataType 5 2 NRA24 back Sensor Back After the PC or other MCU sends the configuration signal to NRA24 NRA24 will return the execution result The format is shown in the following table The start sequence 0xAAAA and the termination sequence 0x5555 have been omitted from the table Table 6 NRA24 back message...

Page 10: ...test 7f Save parameters Result 7 1 0 1 u1 0 fail to read 1 succeed to read Parameter 8 15 1 0 255 u8 Master Version 16 23 1 0 255 u8 Second Version 23 31 1 0 255 u8 Step Version Reserved 32 55 1 Check Sum 56 63 1 0 255 u8 The sum of lower eight bits of first seven bytes 5 3 NRA24 system status Sensor Status The NRA24 system status message format is shown in the following table The start sequence 0...

Page 11: ...k Sum 56 63 1 0 255 u8 The sum of lower eight bits of first seven bytes 5 5 Target output information Target Info The target output message format of NRA24 is shown in the following table The start sequence 0xAAAA and the termination sequence 0x5555 have been omitted from the table When the radar sensor works normally and detects the target it outputs the NRA24 system status message and then outpu...

Page 12: ...et Rcs RcsValue 0 5 50 Factory test retention value do not do output Range RangeHValue 256 RangeLValue 0 01 The original data unit of the radar output is cm and the unit of target distance after conversion is meters RollCount RollCountValue counter Check sum Check Sum check sum Verify whether there is an error in the data transmission The target reflection Radar Cross Section RCS the target range ...

Page 13: ...0x100 0x70C Data Payload 0x01 0xC8 0x07 0xD0 0x00 0x02 0xEE 0x90 End Sequence 0x5555 Each field of Data Payload is parsed as following Index 1 Rcs 0xC8 0 5 50 50 Range 0x07 0x100 0xD0 0 01 20 Rsvd1 0 RollCount 0x0 0xE0 5 0 Check sum 0x90 The sum of lower eight bits of first seven bytes 0x90 0xFF 0x290 0x290 0x01 0xC8 0x07 0xD0 0x00 0x02 0xEE Note The user needs to program to parse the sensor outpu...

Page 14: ...ic material is in direct contact with the corroded antenna structure which has a higher dielectric constant for the resonant frequency of the patch 7 2 Identification of electrostatic damages In general the following conditions indicate that the module has been subjected to electrostatic damage Radar continuously outputs non regular targets when there is no target in radar coverage When the DC val...

Page 15: ...which will it be subjected to the ground surface or water surface A NRA24 is millimeter wave radar with high range accuracy developed by Nanoradar In practical application if the height is less than 3m there would be great air flow below the plane and the vegetation is likely to be blown away so the reference point is the ground or water surface If the airplane reaches over 5m the airflow would no...

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