Wistron NeWeb RI03 Users manual

Blind Spot Warning (BSW) and Rear Cross Traffic Alert (RCTA) specification

Model Name: UMD-RI03, UMD-RI03 –L, UMD-RI03 -R

Version: V01

2018/2/21

Jimmy JW Chang

Contents

1 Scope ...................................................................................................................................................... 3

2 Terms and definitions ............................................................................................................................ 3

3 Reference ............................................................................................................................................... 3

4 General description ................................................................................................................................ 4

4.1 System introduction ....................................................................................................................... 4

4.2 System diagram ............................................................................................................................. 4

4.3 Hardware Block Diagram .............................................................................................................. 4

4.3.1 Right and left side Sensor .............................................................................................................. 4

4.3.2 ECU control box ............................................................................................................................ 5

4.4 Software Implementat io n ............................................................................................................... 5

4.5 Software Block Diagram ............................................................................................................... 5

5 System Function Description ................................................................................................................. 6

5.1 Function definition ......................................................................................................................... 6

5.1.1 BSW function ................................................................................................................................ 6

5.1.2 RCTA function ............................................................................................................................... 7

5.2 Connecter pin define ...................................................................................................................... 8

6 Technical specification ........................................................................................................................ 10

6.1 Basic parameters: ......................................................................................................................... 10

6.2 Performance parameters: ............................................................................................................. 10

6.3 Field of View (FoV) ..................................................................................................................... 11

6.4 Detection target ............................................................................................................................ 11

6.5 The false alert rate and detection rate .......................................................................................... 11

7 Mechanical requirements ..................................................................................................................... 12

7.1 Weight .......................................................................................................................................... 12

7.2 Sensor size ................................................................................................................................... 12

7.3 Installation ................................................................................................................................... 13

8 System Function Design ...................................................................................................................... 15

8.1 BSW warning ............................................................................................................................... 15

8.2 RCTA warning ............................................................................................................................. 15

8.3 Self diagnostics ............................................................................................................................ 15

9 Design Verification .............................................................................................................................. 16

9.1 Environmental T e st ...................................................................................................................... 16

9.2 Performance test .......................................................................................................................... 16

10 Federal Communications Commission (FCC) Statement ............................................................ 17

1 Scope

This document describ es the system dev el op men t of sm all for m factor (SFF) blind spot warning (BSW). This is includes technical s pecification, system function design requirements, mechanical design/ installation, software interface/communication and test verification.

2 Terms and definitions

 BSW (Blind spot warning):This system assists drivers in driving safely by detecting and

warning them of the presence of other vehicles in the blind spot area

 RCTA (Rear cross traffic alert): This function assists driver in rear gear by detecting and

warning them of other vehicle driving from side of rear.

 24GHz ISM Band (Industrial scientific medical radio): It is radio bands (portions of the

radio spectrum) reserved internationally for the use of radio frequency (RF) energy for industrial, scientific and medical purposes other than telecommunications. T he frequency bandwidth 24~24.25 GHz can be used for worldwide radar application. We also call this is Narrow Band Radar, which is different from ultra wide band radar.

 FOV (Field of view): The maximum azimuth angle that radar system can detect the

target vehicle.

3 Reference

 ISO 17387  ES-X82010  ISO16750

Sensor(Left) Sensor (R)

IGN GND

ECU with Buzzer

Private CAN

IGN

GND

Speed

IND_R/L

Rear light

ILL

LED_R

4 General description

4.1 System introduction

This system is composed of two 24 GHz narrow-band sensors. Its intended function is for blind spot warning (BSW) to assist driver for the driving safety.

4.2 System diagram

The system includes a master sensor and a slave sensor. Two sensors are communicated by “Private CAN”. The external interface is to connect with ignition power (IGN, 12V) and CAN message of vehicle information. The communication interface between two sensors is CAN (Private CAN). The information transmitted through this CAN relates to vehicle data, sensor position setup data, warning parameter setup data and normal warning data output. ECU will transfer the vehicle data to sensors and control the HMI warning output.

4.3 Hardware Block Diagr a m

4.3.1 Right and left side Sensor

It is composed of RF tuner and DSP. It includes one Vehicle CAN (optional) and one Private CAN.

4.3.2 ECU control box

Ii is mainly composited by the MCU. It have radar conversion information 、HMI output an d Gyro simulated the hardware of Yaw rate(Reserved) .

4.4 Software Implementation

 MPLAB IDE V8.86  Matlab 2012b

The software design process is mainly for detection, tracking and warning. It also provides self-diagnosis.

4.5 Software Block Diagram

The right and left sensor software structure shows below. The communication between right and left sensor is through CAN, which is Private CAN.

Right side Blind zone

0.5m

Center of the car

Left side Blind zone

0.5m

5 System Function Description

5.1 Function definition

5.1.1 BSW function

BSW system is designed for monitoring adjacent lane and providing warning. The warning zone definition is below.  The warning distance of passenger vehicle is 7m behind the rear of subject vehicle.

(Normal driving behavior for overtaking)

 There is non-warning zone at side of vehicle 0.5m.  The warning width may be adjusted by subject vehicle speed.  The activation speed of system is 10km/h.

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