Vehicle Passenger IR Checking with Distance-Based Intensity Control
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Solution Overview
Problem
Infrared radiation used for vehicle passenger checks can cause health impairments, particularly eye injuries due to high intensity, and existing methods for controlling intensity or distance measurement are inadequate.
Innovation Solution
A method using visible light pulses and an optical camera to determine distance, adjusting infrared radiation intensity based on distance, and employing multiple infrared sources to maintain total energy input below safe limits, thereby protecting the passenger from excessive radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high intensity infrared radiation is used for passenger checking, then monitoring accuracy is improved, but health safety deteriorates due to tissue damage and eye injury risks
Solution Approach 1:
The patent applies dynamics by making the infrared radiation intensity adjustable rather than fixed. The control unit dynamically adapts the intensity based on detected parameters such as pupil distance, enabling the system to optimize monitoring accuracy while preventing excessive exposure that could cause tissue damage or eye injuries.
Solution Approach 2:
The patent changes the parameter of radiation intensity from a constant high value to a variable parameter. By modifying the intensity parameter according to measured distances and safety thresholds, the system achieves both accurate monitoring and health protection simultaneously.
2Reliability
If infrared radiation intensity is increased to improve detection capability, then detection performance is improved, but eye safety deteriorates due to thermal radiation damage
Solution Approach 1:
The patent implements feedback by using the control unit to continuously monitor detection parameters and adjust the infrared radiation intensity accordingly. The system measures pupil distance and other parameters, then feeds this information back to modulate the radiation intensity, ensuring detection performance is maintained while eye safety is protected through automatic intensity regulation.
Solution Approach 2:
The system transitions from static high-intensity radiation to dynamic intensity control. The radiation intensity is adjusted in real-time based on feedback from distance measurements, allowing the system to maintain reliable detection while preventing thermal damage to eyes.
3Measurement precision
If distance measurement uses infrared radiation, then measurement capability is improved, but harmful exposure increases due to additional infrared light usage
Solution Approach 1:
The patent applies universality by using the infrared radiation source for multiple functions: both for the primary passenger monitoring task and for distance measurement. This eliminates the need for separate measurement systems that would increase overall exposure, as the same controlled infrared source serves dual purposes.
Solution Approach 2:
The system merges the distance measurement function with the passenger monitoring function by using the same infrared radiation source and control mechanism. This combination reduces total harmful exposure compared to using separate independent systems, while maintaining both measurement capabilities.
4Duration of action of moving object
If continuous infrared radiation is used for monitoring, then monitoring coverage is improved, but energy exposure increases causing potential tissue damage
Solution Approach 1:
The patent applies periodic action by using pulsed or intermittently activated infrared radiation instead of continuous emission. The radiation is delivered in controlled bursts or at regulated intervals, maintaining adequate monitoring coverage over time while significantly reducing the cumulative energy exposure that could cause tissue damage.
Solution Approach 2:
The system dynamically controls the temporal pattern of radiation delivery, switching from continuous to intermittent operation. This dynamic time-based control allows the system to maintain monitoring effectiveness while limiting total energy exposure to safe levels.
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
Effectively protects vehicle passengers from infrared radiation hazards by ensuring safe intensity levels and precise distance measurement, preventing eye strain and ensuring accurate passenger monitoring without disturbance.
Implementation Method 1
the light source puts out light pulses and the camera detects the light of the light pulses reflected back from the person
Implementation Method 2
the vehicle passenger is exposed to infrared radiation, which carries the risk, if the intensity of the infrared radiation is too high, of damaging tissues, first and foremost the eyes may be injured by thermal radiation
Data Source
AI summary
A method for performing a checking of a person, such as a vehicle passenger, by way of infrared radiation involves determining the distance between a source of infrared radiation and the person by way of light according to a distance definition and setting the intensity of the infrared radiation in dependence on the distance as determined.