This document explains the functional scenarios, system composition, interface requirements, etc. of the DMS system.
This functional specification provides a reference for the development of DMS systems and peripheral components.
| English abbreviations |
Full English name |
Chinese description |
| Driver Monitoring System |
driver monitoring system |
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| MPU: |
Micro Processor Unit |
microprocessor unit |
| IECU: |
Intelligent Electronic Control Unit |
Autonomous driving controller |
| LVDS: |
Low-Voltage Differential Signaling |
Low voltage differential signaling |
| HUD: |
Head Up Display |
heads up digital display |
| AR: |
Augmented Reality |
Augmented Reality |
| TPR: |
True Positive Rate |
The proportion of identifiable positive samples among all positive samples |
| FPR: |
False Positive Rate |
The proportion of negative samples misidentified as positive samples among all negative samples |
| CAN： |
Controller Area Network |
CAN network |
| LIN： |
Local Interconnect Network |
LIN network |
| TBD： |
To Be Defined |
To be determined |
| KL.15： |
Ignition Supply |
IGN powered |
| KL.30： |
Battery Positive |
battery power |
| BDCM： |
Body Domain Control Module |
body domain controller |
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- Design Basis
- Standards/ Regulations
- Design Basis
There are currently no regulatory requirements for DMS
N/A
The provisions in the following documents become provisions of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrigenda) or revisions do not apply to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. . For undated referenced documents, the latest edition applies to this standard.
Functional items of the VX1 driver monitoring system include the following:
- Driver fatigue monitoring: Identify the driver's eyes-closed state and yawning movements during driving, and provide fatigue warning for these two typical fatigue movements, and input them as activation conditions for the Pilot function of ADCM;
- Driver attention monitoring: detects whether the driver's attention range during driving is within the normal driving attention range. If it deviates from the normal driving attention range, an early warning will be issued to prompt the user to concentrate on driving, and it will be input as the pilot function activation condition of ADCM ;
- FaceID; the driver passively/actively applies for facial recognition after getting in the car, and outputs facial feature ID;
- From the time the device is powered on to the application loading, it will be completed within 10 seconds;
The DMS system consists of two parts: data collection and algorithm identification.
Data collection is completed by the cooperation of the camera and the infrared fill light module. The infrared fill light is responsible for ensuring that the image brightness of the data captured by the camera meets the requirements. The camera collects the driver's face and action posture information in real time and transmits the data to the DMS ECU through LVDS.
DMS ECU uses an algorithm model based on deep learning to process driver status data and calculate driver identity authentication results, eyes closed/yawning, driver head posture and visual field detection results.
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| Tyco |
1-1318772-3 |
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| Pin number |
Pin definition |
Function description |
| X2100.1 |
NC |
Reserve ETH_Positive |
| O_S_OUT3 |
Camera power output |
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| GND |
Systematically |
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| B_D_CAN1L |
CAN1 bus low bit of MCU |
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| X2100.5 |
NC |
NC |
| UBD |
System power input |
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| X2100.7 |
NC |
Reserve ETH_Negative |
| NC |
ReservedInputSwitch _ |
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| GND |
Systematically |
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| B_D_CAN1H |
CAN1 bus high bit of MCU |
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| NC |
Reserved HSD (10mA) |
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| I_S_WKUP |
Wake-up signal ( IGN ) |
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| Tyco |
2291392-3 |
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| Pin number |
Pin definition |
Function description |
| B_D_VEDIO_P |
50Ω同轴FAKRA连接器输入正极 |
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| X1900.2 |
GND |
地 |
| X1900.3 |
GND |
地 |
| X1900.4 |
GND |
地 |
| X1900.5 |
GND |
地 |
DMS各项功能描述及应用场景、输出信息描述如下表所示：
| 功能项 |
功能描述 |
输出信息 |
应用场景 |
| 电源管理 |
该功能定义：DMS的电源入口供电电压UBD在不同电压等级下的功能参数。 |
DMS电源状态 |
整车电源电压波动时，保护DMS控制器 |
| 状态转换机制 |
为满足整车静态功耗需求，所定义的实现功耗降低的功能逻辑。 |
DMS工作状态 |
降低整车静态时能耗 |
| 摄像头驱动 |
控制器提供单独一路供电给摄像头及补光灯 |
两路视频输出 |
一路输出给DMS一路给BDCM做情绪识别 |
| 红外LED驱动 |
DMS摄像头提供1路LED驱动，控制信号由DMS控制器和DMS摄像头共同控制。 |
红外补光 |
对驾驶员面部进行补光 |
| IDCM驾驶员疲劳预警 |
识别驾驶员眼睛及嘴部状态检测疲劳等级； 疲劳预警功能开关状态通过车机提供的IDCM_DSMSwitch信号接收，由DSM_FatigueFunction_St信号反馈当前DMS疲劳工作状态； |
输出疲劳等级（不疲劳、轻度疲劳、重度疲劳） |
驾车过程中对驾驶员进行疲劳监测并进行报警 |
| L3驾驶员疲劳检测 |
识别驾驶员眼睛及嘴部状态检测疲劳等级，同时输出疲劳置信度； |
输出疲劳等级（不疲劳、轻度疲劳、重度疲劳）及疲劳置信度 |
驾车过程中对驾驶员进行疲劳监测并并作为L3级别ADAS功能进行降级逻辑判断 |
| 驾驶员注意力监测 |
识别驾驶员头部及眼睛朝向检测驾驶员注意力，同时输出分心置信度 |
驾驶员注意力是否在正常驾驶范围内(Y or N)及注意力置信度 |
驾车过程中对驾驶员注意力进行监测并进行预警，并作为ADCM的Pilot功能激活条件输入 |
| 驾驶员兴趣点输出 |
识别驾驶员头部及眼睛朝向，输出驾驶员注视点位置 |
输出驾驶员兴趣点（Unknown、On Road、Off Road、Drivers Lap、Center Console） |
ADCM使用该信号做Pilot控制 |
| 驾驶员人头及人眼检测 |
输出是否能识别人头和人眼 |
输出是否能检测到人头或人头及人眼（未检测到人头、检测到人头、检测到人头及人眼） |
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| 驾驶员头部位置输出 |
输出驾驶员头部位置、朝向，作为HUD输入 |
输出头部X/Y/Z坐标、头部水平/垂直夹角 |
驾车过程中提供给ARHUD头部位置信息 |
| FACE ID |
人脸识别，输出人脸特征ID |
输出人脸特征ID |
驾驶员上车后被动/主动申请人脸识别 |
| 故障诊断 |
通过对输入图像以及内部运行参数进行评估，来实现故障的自诊断机制。 |
诊断信息 |
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| CANFD通讯功能 |
DMS与整车交互通讯 |
DMS功能状态及预警信号 |
整车网络交互 |
系统连接KL30常电和IGN硬线，系统上电后首先进行CAN、Ethernet、Camera等外设初始化，并打开电源电压采集控制端口S32V_UB_SW_EN，并连续采集5次电源电压，确定当前所处电源状态，根据当前电源电压状态进行各个功能配置。
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