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MR76 77GHz MMW Radar User Manual

MR76(v1.1)2020-3-10

Hunan Nanoradar Science and Technology Co., Ltd

14

4.2 CAN Interface

The CAN interface allows the notebook or PC to communicate USB with the device via a USBCAN
converter. The interface pins of the CAN interface are defined as follows:

Table 4 Pin definition

Pin

Definition

Range

8

POWER IN(Brown)

6

～

32V DC

5

GND(Black)

-

4

CAN_H(Yellow)

0

～

3.3V DC

3

CAN_L(Blue)

0

～

3.3V DC

4.3 Test and Use

Nanoradar Provide NSM_77 Tools test software to acquire the target information with visual and direct
data. This tool can help the user understand or evaluate the performance of the radar sensor.
Download the NSM_77 Tools installation package, user manual, and USBCAN box driver from
Nanoradar official website: http://www.nanoradar.cn/. Install and configure the test software according
to the manual.
1)The radar should be tested according to the the pic3.1 installation instruction when you test the
product functions.
2) NSM_77 Tools utilizes the USB2CAN adapter shown in figure 7 to communicate with SR73F. Other
types of USB2CAN adapters are not supported at this time. The shipping list doesn’t include USB2CAN
adapters by default. Customers can get it from Nanoradar customer service to obtain CAN adapter
purchase link or buy it directly from Nanoradar.

Test steps as below

：

1) Test tools and software are as the following table,

Summary of Contents for MR76

Page 1: ...MR76 77GHz MMW Radar User Manual MR76 v1 1 2020 3 10 Hunan Nanoradar Science and Technology Co Ltd 1 MR76 77GHz MMW Radar User Manual 湖南纳雷科技有限公司 Hunan Nanoradar Science and Technology Co Ltd ...

Page 2: ... to change without notice Please read this manual carefully before using this product Once used it is deemed to have recognized and 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 i...

Page 3: ...r User Manual MR76 v1 1 2020 3 10 Hunan Nanoradar Science and Technology Co Ltd 3 Version history Date Version Version description 2018 11 20 1 0 The 1st version of user manual on MR76 2020 3 10 1 1 Content add and revise ...

Page 4: ...hicle 8 a Thickness 12 b Spraying 12 c Alignment 13 3 Electrical Conditions 13 3 1 Cable Connection 13 3 2 CAN Interface 14 3 3 Test and Use 14 4 Influence on Human Health 16 5 Technical Parameter 18 5 1 The Field of View FoV 18 5 2 Cable Connection 19 6 Interfaces 20 6 1 CAN interface 20 6 2 Input Signals Possible Dynamic Parameters 21 7 Device Dimensions 21 7 1 Dimensions 21 8 Notes on Safety an...

Page 5: ...plication examples The MR76 77GHz millimeter wave radar is suitable for applications such as special vehicles collision avoidance and automotive forward collision avoidance Other atypical applications are as follows A Distance Monitoring Warning Distance monitoring with warning message if the distance to the preceding object is too close B Detection and tracking of people vehicles animals and equi...

Page 6: ...ence Figure1 FMCW radar block diagram Taking the sawtooth frequency modulated continuous wave as an example to briefly introduce the radar s ranging velocity measurement principle As shown in Figure 1 1 blue is the transmitting signal frequency yellow is the receiving signal frequency the sweep period is T the sweep bandwidth is B the transmitted signal is transmitted through the target and the ec...

Page 7: ... short range mode Distance Resolution spot target none tracking 0 68m ability to separate targets and objects 1 5 2 x resolution Distance Accuracy spot target none tracking 0 30m FOV 45 16dB Angle Resolution spot target none tracking 0 1 middle mode 0 3 0 1 45 short mode Velocity Range 200km h 300km h leaving object approximation Velocity Resolution spot target none tracking 1 23km h Velocity Accu...

Page 8: ...tion 3 1 Mounting on Vehicle Radar Mounting For front rear detection and related applications the MR76 is mounted at a height of 0 4 to 1 5 m from the ground and the radar antenna faces directly in front The installation specification is shown in MR76 Dual beams mid range and short range work simultaneously and can not be switched The detected targets are output in order of distance or RCS By defa...

Page 9: ... Ltd 9 Figure 3 and Figure 4 Figure 3 Radar vertical installation instruction Figure 4 Radar horizontal installation instruction 3 2 Radar direction description The beam width of the MR76 antenna is horizontal 90 short distance 8 middle distance and elevation angle 14 The direction is as follows ...

Page 10: ...e first is that the radar wave cannot completely penetrate the radome due to the reflection loss and the loss of the medium will reduce the power of the radar signal The second is that the distortion of the antenna beam causes the radar detection area to change which may cause the radar to be interfered by the backward target The third is that the radome will deteriorate the standing wave of the r...

Page 11: ...4 Requirements for bumpers According to the radar sensor mounting position the distance between the radar sensor radome and the bumper should be large enough to reduce the effects of mechanical interference thermal geometry changes or mechanical stress In addition the distance from the radar to the bumper should be large enough to avoid continuous rain snow or mud blockage It is recommended that t...

Page 12: ...the attenuation In order to prevent distortion of the radar beam the bumper should be as flat and uniform as possible and any slight bending will have a great impact on the radar beam c Spraying In theory the bumper can be sprayed but detailed analysis and inspection should be carried out to avoid degrading the performance of the radar sensor In general bumpers are originally provided with a prime...

Page 13: ...nd the metal plate shall be within the range 0 8m a 2 m Requirements for the material of reflector plate Aluminum Iron Steel Requirements for the surface finish of the plate Flatness of surface shall be at least f 0 1 mm in each subarea of 80 mm x 80 mm Roughness RZ 50 is equal to 50 µm 4 Electrical Conditions 4 1 Cable Connection The MR76 connecting cable is with a length of 3 meters including th...

Page 14: ...nd or evaluate the performance of the radar sensor Download the NSM_77 Tools installation package user manual and USBCAN box driver from Nanoradar official website http www nanoradar cn Install and configure the test software according to the manual 1 The radar should be tested according to the the pic3 1 installation instruction when you test the product functions 2 NSM_77 Tools utilizes the USB2...

Page 15: ...e PC and SR73F radar sensor via USBCAN adapter and the connection diagram is as follow Figure 7 CANBUS connection and test diagram Note The test needs to use the USBCAN adapter shown in the figure below to communicate with the MR76 Nanoradar NSM_77 Tools does not support other types of USBCAN adapters The shipping list does not include the USBCAN adapter by default Customers can purchase the CAN a...

Page 16: ...s facing the moving target or the radar sensor has a slight motion relative to the target you can view the red triangle of the target indication on the UI interface and display the target distance R Figure 3 3 the target s radial distance to the radar is 2m 5 2m MR76 can detect the target within 170 meters If there is no red triangle indication there is no target in the detectable distance and the...

Page 17: ...th CFK sheet conductive The plastic material is in direct contact with the corroded antenna structure the effect of dielectric constant on the resonant frequency of the patch 5 2 Identify electrostatic damage In general the following two conditions indicate that the module has suffered electrostatic damage When there is no target object in the radar detection coverage the radar continuously output...

Page 18: ... as described in the mounting guideline section Within the FoV object detection for the different object classes is guaranteed in the limit as depicted in the data sheet chapter 7 Figure 10 MR76FoV Table 5 FoV Maximum detection range Maximum detection range for the far range Azimuth angle Passenger car Motorcycle Moped Pedestrian 10 dBsm 10m2 5 dBsm 3m2 0 dBsm 1m2 7 dBsm 0 2m2 0 170 130 90 70 9 12...

Page 19: ...he default installation direction should be that the radar interface is facing to the left The mounting orientation affects the position of the TX and RX antennas Because the TX and RX antennas have different apertures they are subject to different secondary surface structures For best performance the mounting location and cable connection direction shall be finalized after customer test evaluatio...

Page 20: ...00Kbit s Blue 7 NC Not available Not available 8 NC Not available Not available 8 Interfaces 8 1 CAN interface CAN is the abbreviation of Controller Area Network CAN It was developed by German BOSCH which is famous for developing and producing automotive electronics products and eventually became an international standard ISO 11898 In North America and Western Europe the CAN bus protocol has becom...

Page 21: ...mission medium can be twisted pair coaxial cable CAN bus is suitable for large data volume short distance communication or small data volume long distance communication in real time or case like multi master multi ordinary or each node is used in the same field Table 7 Line Specification Line length Max transfer rate Specific line resistance Cable cross section 0 40m 1Mbit s 70mΩ m 0 25 0 34mm2 40...

Page 22: ...med that this is the case The device should only be used by trained operators The person or owner responsible for the device must ensure that all operators understand and observe these safety notes If the MR76 is part of a system the system manufacturer is responsible for ensuring that the safety related aspects are heeded e g the operating manual labeling and instructions 10 1 Areas of responsibi...

Page 23: ...DAR as soon as a device or the equipment displays any safety defects The owner is responsible and has to confirm that the owner customer end customer and end user will add resp copy the following disclaimer and information incl the declaration of conformity in their own documentation resp manual MR76 77GHz MMW radar is allowed for the usage in research testing purposes 11 Common faults and solutio...

Page 24: ...1 2020 3 10 Hunan Nanoradar Science and Technology Co Ltd 24 Hunan Nanoradar Science and Technology Co Ltd Tel 0731 88939916 B7 Lugu Compark No 27 Wenxuan Rd E Mail sales nanoradar cn Hi tech District Changsha Hunan China URL www nanoradar cn ...

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