HRV Detection Module for Driver Safety Monitoring
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Solution Overview
Problem
Current safe driving systems lack the ability to detect a driver's physiological state, particularly heart rate variability (HRV), which is crucial in preventing accidents caused by factors like drunk driving, fatigue, or emotional distress, and do not have anti-theft features to prevent unauthorized vehicle use.
Innovation Solution
A safe driving system equipped with a HRV detecting module that sends warning messages and alerts authorities if the driver's HRV falls within abnormal ranges, integrating with a display interface, wireless communication, and a control button to initiate emergency messages, and utilizing biometric HRV patterns for vehicle authorization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ADAS is installed to monitor road conditions and assist driving, then driving safety is improved through object detection and warning systems, but the system cannot detect the driver's physiological state, so safety is compromised when the driver is drunk, fatigued, or under emotional distress
Solution Approach 1:
The patent introduces an intermediary device (mobile phone or portable electronic device) that serves as a bridge between the driver and the vehicle's safety system. This intermediary contains the HRV detection module and communicates with the vehicle's ADAS, enabling physiological state monitoring without requiring direct integration into the vehicle's core system. The intermediary device detects HRV through the driver's personal device and transmits this information to the vehicle's safety system, thus resolving the information gap about driver state.
Solution Approach 2:
The patent leverages the universality of personal mobile devices that drivers already carry. These devices serve multiple functions: they are used for communication, navigation, and now also for HRV-based physiological state detection. By utilizing an existing universal device rather than requiring a dedicated detection device, the system achieves multi-functionality and reduces additional hardware requirements while still capturing critical physiological information.
2Object-affected harmful factors
If traditional driving safety systems are used, then basic road safety monitoring is achieved, but they lack the capability to prevent accidents caused by driver physiological states such as drunk driving, drug abuse, or fatigue
Solution Approach 1:
The patent uses a personal portable electronic device as an intermediary that already exists in the driver's possession. This intermediary contains the HRV detection module and serves as the primary sensing device. By using this intermediary rather than installing complex detection equipment in the vehicle, the system avoids increasing vehicle system complexity while still achieving the goal of detecting harmful physiological states.
Solution Approach 2:
The patent replaces potential mechanical or complex sensor-based detection systems with a photoplethysmography (PPG) based optical detection method. The HRV detection module uses light absorption changes in blood to measure heart rate variability, substituting complex mechanical sensors with simpler optical sensors that can be integrated into existing personal devices. This reduces overall system complexity while maintaining detection accuracy.
3Reliability
If HRV detection module is integrated into the vehicle system, then driver physiological state can be monitored, but the system complexity and cost increase significantly
Solution Approach 1:
The patent positions the personal portable electronic device as an intermediary that houses the HRV detection module. This intermediary already contains necessary processing power, display capabilities, and communication functions. By placing the detection module in this intermediary rather than integrating it directly into the vehicle's complex systems, the patent reduces integration complexity while maintaining detection reliability through the use of established PPG technology.
Solution Approach 2:
The patent utilizes the existing hardware and software infrastructure of personal mobile devices as a copy of a suitable detection platform. Rather than designing and manufacturing a completely new integrated vehicle system, the patent adapts and utilizes the already-optimized hardware in personal devices for HRV detection. This copying approach reduces development complexity and leverages existing reliable components.
4Reliability
If the system monitors HRV continuously, then driver safety can be ensured by detecting abnormal states, but energy consumption and user distraction increase
Solution Approach 1:
The patent implements periodic HRV monitoring rather than continuous monitoring. The system checks the driver's physiological state at regular intervals (e.g., every few minutes or at key driving moments) rather than continuously. This periodic approach maintains safety monitoring reliability by detecting significant physiological changes while significantly reducing energy consumption compared to continuous monitoring. The system can adjust the monitoring frequency based on detected HRV trends.
Solution Approach 2:
The patent leverages the personal portable electronic device's existing power management and processing capabilities to handle the HRV detection and analysis. The device uses its own battery and processing power rather than requiring a separate power source and processing unit in the vehicle. This self-service approach reduces the overall energy burden on the vehicle system while maintaining continuous monitoring capability through the driver's personal device.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively prevents traffic accidents by monitoring and responding to abnormal HRV levels, ensuring the driver's safety and preventing unauthorized vehicle use, thereby enhancing traffic safety and security.
Implementation Method 1
HRV is the degree to which the frequency of heart beats varies over a time interval
Implementation Method 2
the module 'SFH 7050—Photo Plethysmoraphy (PPG) Sensor' manufactured by Osram
Data Source
AI summary
A safe driving system having function of detecting heart rate variability is disclosed. The safe driving system having function of detecting heart rate variability mainly includes a detection display unit and a main control host. The detection display unit includes: a HRV detecting module, a display interface module, a first internal wireless communication module, a control button, a first processor, a power module and a voice management module comprising a microphone and an amplifier. The main control host includes: a mobile communication module, a satellite navigation system module, a second internal wireless communication module, a records preserving module, a second processor, a vehicle power module, a secondary power module, a power management module and an alarm module. The safe driving system having function of detecting heart rate variability is able to prevent the vehicle's driver from traffic accidents jeopardizing traffic safety due to drinking, taking drug, fatigue or an emergency occurred while driving.