Wistron NeWeb RT05 24GHz Rader BSD+RCTA sensor system User Manual BSD RCTA System Specification
Wistron NeWeb Corporation 24GHz Rader BSD+RCTA sensor system BSD RCTA System Specification
User Manual
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| Document ID | 3197800 |
| Application ID | MY/YXZQFf+IhCjWwvW4p6g== |
| Document Description | User Manual |
| Short Term Confidential | No |
| Permanent Confidential | No |
| Supercede | No |
| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 43.23kB (540346 bits) |
| Date Submitted | 2016-11-16 00:00:00 |
| Date Available | 2016-11-17 00:00:00 |
| Creation Date | 2017-12-17 20:52:35 |
| Producing Software | GPL Ghostscript 9.18 |
| Document Lastmod | 2017-12-17 20:52:35 |
| Document Title | BSD+RCTA System Specification |
| Document Creator | Microsoft® Office Word 2007 |
| Document Author: | Nancy Wu |
BSD+RCTA System Specification Project: RT05 2016/11/15 WNC Nancy Wu FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. 1 HISTORY ............................................................................................................................................................... 3 SCOPE ................................................................................................................................................................ 4 SYSTEM DESCRIPTION .................................................................................................................................. 5 3.1 SYSTEM INTRODUCE ............................................................................................................................................... 5 3.2 SYSTEM DIAGRAM .................................................................................................................................................. 5 3.3 SUB- SYSTEM DESCRIPTION ................................................................................................................................... 5 3.3.1 BSD function ................................................................................................................................................ 5 3.3.2 RCTA (Rear Cross Traffic Alert) ................................................................................................................ 6 TECHNICAL REQUIREMENT .......................................................................................................................... 7 4.1 BASIC PARAMETER .................................................................................................................................................. 7 4.2 RADAR PERFORMANCE ........................................................................................................................................... 7 FUNCTION REQUIREMENT ............................................................................................................................ 8 5.1 DETECTION ............................................................................................................................................................. 8 5.2 WARNING ................................................................................................................................................................ 8 5.2.1 Blind zone define of BSD system ............................................................................................................. 8 5.2.2 Parameter of BSD system ......................................................................................................................... 9 5.2.3 RCTA zone of RCTA system ................................................................................................................... 11 5.2.4 Parameter of RCTA system ..................................................................................................................... 12 5.3 SELF DIAGNOSTIC ................................................................................................................................................. 12 MECHANICAL REQUIREMENT .................................................................................................................... 13 6.1 W EIGHT ................................................................................................................................................................. 13 6.2 THE SIZE OF SENSOR ............................................................................................................................................ 13 6.3 INSTALLATION ........................................................................................................................................................ 14 CONNECTER INTERFACE ............................................................................................................................ 15 7.1 CONNECTER.......................................................................................................................................................... 15 7.2 PIN DEFINE ............................................................................................................................................................ 15 1 History Version# Reviser Date 0.1 Nancy 2016.11.15 Description of the revision Reviewer First release 2 Scope This document describes system introduce, technical requirement, function requirement, mechanism, installation, connecter interface, CAN communication and environment requirement. 3 System description 3.1 System Introduce Two 24 GHz narrow band sensors compose this system. Two major functions are included which are BSD (Blind spot detection)and RCTA (Rear cross traffic Alert). 3.2 System Diagram Master Sensor IGN GND Private CAN ECU Slave Sensor ECU is built by customer. The communication interface between 2 sensors is CAN (Private CAN or sensor CAN). The information on this CAN is vehicle data, sensor position setup data, warning parameter setup data and normal warning data output. 3.3 Sub- system description 2 sub-systems are included which is BSD and RCTA 3.3.1 BSD function Blind Spot Detection (BSD) Radar sensor is designed for short range detection, the field of view is selected to cover the full blind spot warning zone, which is defined in the related ISO norms (ISO- 17387) corresponding to this application. 3.3.2 RCTA (Rear Cross Traffic Alert) The Rear Cross Traffic Alert (RCTA) system uses the same radar infrastructure used for detecting vehicles in the blind spot (Blind Spot Detection, BSD). Some serious accidents are happen when driver are reversing out of parking space (Refer to follow picture). The usual reason of these accidents is because drivers either fail to see a vehicle or cyclist approaching from the side or they see them too late. RCTA system provides assistance to the driver to prevent this. It is activating when the reverse gear is selected. 4 Technical requirement 4.1 Basic parameter Operation voltage range：9~16V Typical operation voltage: 12V Operation temperature：-30℃~+85℃ Maximum power consumption ：7W Operation frequency: 24GHZ (NB) Water proof: IP67 4.2 Radar performance Frequency : 24.075 – 24.225GHz (Left side) 24.065 – 24.215GHz (Right side) FOV : 120 degree range accuracy: 0.25m range resolution:1m velocity accuracy: 0.08 m/s Velocity resolution: 0.31 Angular accuracy):+- 1degree Maximum objects detection : 32 Cycle Time: 20.48ms m/s 5 Function requirement 5.1 Detection FOV is 120 degree. 120° 120° 30m 30m 5.2 Warning 5.2.1 Blind zone define of BSD system The warning zone definition is as follow, and it can be adjusted if needed. Right side blind zone 3.8~4.5m dynamic change 0.4m 2m 7m Center of the car 0.4m 2m 7m 3.8~4.5m dynamic change Left side blind zone 5.2.2 Parameter of BSD system Car Ys Xf Ys Alert Region Alert Region Xr Extend Alert Region Extend Alert Region Tracking Object Tracking Object Unit: meter(m) Parameter Description Default value Xf Forward length of Alert region 2m Xr Backward length of Alert region 7m Ys Alert ignore area 0.4m Thold_ToS Warning hold time when target overtaking subject 0.5sec Thold_SoT Warning hold time when subject overtaking target 0.5sec Vy_dynamic_alarm_min The velocity minimum gate for dynamic y distance 18m/s Vy_dynamic_alarm_max The velocity maximum gate for dynamic y distance 38.75m/s y_dynamic_alarm_min Minimum gate of dynamic y distance 3.8m y_dynamic_alarm_max Maximum gate of dynamic y distance 4.5m Alert width Variable Alert length after rear bumper Variable For Y: If relative speed of object Vy_dynamic_alarm_min then Y= y_dynamic_alarm_min If relative speed of object Vy_dynamic_alarm_max then Y= y_dynamic_alarm_max If Vy_dynamic_alarm_minXr then X=VT (Dynamic) 10 5.2.3 RCTA zone of RCTA system The RCTA zone definition is as follow, and it can be adjusted if needed. The moving target which is with Speed between2.5m/sec~15m/sec and enter left or right RCTA ZONE and have Potential collision TTC<2.0sec The maximum subject car speed is not over 15km/hr. 7m Typ. 30m base on TTC <2.0sec Center of the car RCTA Zone Typ. 30m base on TTC<2.0sec 11 5.2.4 Parameter of RCTA system Car Xcf Xcf Tracking Object Tracking Object Xcr Xcr Yc Yc Position of Tracking Object will fall into the potential collision Region (length is Xcf+Xcr, Width is Yc for each side) with TTC within 2sec Parameter Description Default value Forward length of potential collision area 3m Xcf Backward length of potential collision area 5m Xcr Width of each side (right or left) 0.8m Yc 2sec TTC_RCTA Alert TTC setting 5.3 Self diagnostic System will do self diagnostic during the boot up and operation. 12 6 Mechanical Requirement 6.1 Weight Weight of Signal sensor is 285g 6.2 The size of sensor 144*98*23±0.3 mm Outline is as follow: (L*W*H) 13 6.3 Installation There are 4 fix locations, please refer to follow: The master sensor is installed inside the rear bumper of left, and the connecter is down. The slave sensor is installed inside the rear bumper of right, and the connecter is down。 Please refer to follow Azimuth angle is 57 degree Elevation angle is 1~4 degree The height of sensor is 30~80 cm 14 7 Connecter interface 7.1 Connecter I/O connecter [16pin]: ACES: 50992-0161L-001 Wire connecter: Tyco 1438031-1 7.2 Pin define 8.2.1. Master sensor NO Signal Name I/O/P Description Note LED_L HMI LED for left side HMI LED_R HMI LED for right side HMI TURN_R IO Indicator signal for right side Vehicle data TURN_L IO Indicator signal for left side Vehicle data SPD IO Vehicle speed physical line Vehicle data VEHICLE_CAN_H IO Vehicle CAN bus Vehicle data GND Power Ground Ground V_IN Power Input Power --- IO --- --- 10 --- IO --- --- 11 BUZZER HMI Buzzer HMI 12 S_PRIVATE_CAN_L IO Sensor private CAN To slave sensor 13 S_PRIVATE_CAN_H IO Sensor private CAN To slave sensor 14 VEHICLE_CAN_L IO Vehicle CAN bus Vehicle data 15 GND Power Ground Ground 16 V_IN Power Input Power 15 8.2.2. Slave sensor NO Signal Name I/O/P Description Note --- IO --- --- --- IO --- --- --- IO --- --- --- IO --- --- --- IO --- --- --- IO --- --- GND Power Ground Ground V_IN Power Input Power --- IO --- --- 10 --- IO --- --- 11 --- IO --- --- 12 S_PRIVATE_CAN_L IO Sensor private CAN To Sensor 13 S_PRIVATE_CAN_H IO Sensor private CAN To Sensor 14 --- IO --- --- 15 --- IO --- --- 16 --- IO --- --- 16
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