VAD Health Test Using Internal Luminosity Sensor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hazard warning devices, such as visual alarm devices, face challenges in verifying the health of light sources like LEDs due to environmental conditions and degradation over time, making it difficult to ensure correct brightness and flash duration, especially in uncontrolled environments.
Innovation Solution
A hazard detection system with a visual alarm device (VAD) controller that includes a luminosity sensor to perform health tests on light sources, monitoring parameters like luminous intensity and profile, and communicating results, which can be triggered by events like alarm conditions or manual button depression, and autonomously initiated periodically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual checking with a lux meter is used to verify strobe health, then measurement of brightness and duration is possible, but environmental conditions make comparative measurements challenging and unreliable
Solution Approach 1:
The patent introduces an intermediary photodetector element within the VAD that indirectly measures the light source output by detecting the light reflected or emitted from the strobe. This intermediary measurement approach eliminates the need for direct environmental comparison with external lux meters, as the photodetector provides internal reference measurements that are independent of external environmental conditions.
Solution Approach 2:
The system implements feedback by continuously monitoring the light source output through the photodetector and comparing it against stored baseline characteristics. The controller adjusts or alerts based on the deviation from expected performance, creating a closed-loop system that maintains measurement reliability regardless of external environmental variations.
2Duration of action of stationary object
If LED light sources are used in VAD, then energy efficiency and longevity are improved, but the LED degrades over device lifetime making verification difficult
Solution Approach 1:
The patent applies preliminary action by storing baseline light output characteristics of the LED during manufacturing or initial operation. These pre-established reference values enable continuous comparison throughout the device lifetime, allowing the system to detect degradation trends before they compromise safety functionality, thus maintaining reliability over extended operation.
Solution Approach 2:
The photodetector continuously monitors LED output and feeds this information back to the controller, which compares current performance against the stored baseline. This feedback mechanism enables real-time detection of LED degradation, allowing for maintenance alerts or system adjustments that maintain reliable operation throughout the extended device lifetime.
3Measurement precision
If manual checking of each individual device is performed, then verification of strobe health is possible, but the process is time-consuming and labor-intensive
Solution Approach 1:
The VAD performs self-verification by incorporating the photodetector and control logic within the device itself. Each device autonomously monitors its own light source health and communicates status to the central system, eliminating the need for manual inspection of each individual device while maintaining precise verification capabilities.
Solution Approach 2:
The photodetector serves multiple functions: it acts as both a safety verification element and a diagnostic monitoring tool. The same hardware infrastructure supports both individual device verification and fleet-wide monitoring, reducing overall time and resource requirements compared to dedicated manual checking processes.
4Measurement precision
If environmental conditions are controlled for strobe checking, then measurement accuracy improves, but the complexity and cost of the checking process increases
Solution Approach 1:
The photodetector acts as an intermediary that performs measurements internally within the device environment, eliminating the need to create or control external test environments. This internal measurement approach achieves accurate readings without requiring complex environmental control infrastructure.
Solution Approach 2:
The patent extracts the measurement function from the external environment and relocates it to the internal device environment. By taking out the dependency on controlled external conditions and performing measurements internally with the photodetector, the system achieves measurement precision without the complexity of environmental control.
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
Ensures consistent and reliable operation of light sources by detecting faults and communicating alerts, ensuring the light sources meet threshold requirements and maintaining output during emergencies, thereby enhancing the reliability of hazard warning systems.
Implementation Method 1
the VAD also includes a photodetector element
Data Source
AI summary
Disclosed is a hazard detection system having: a visual alarm device (VAD) including a VAD controller which is an electronic controller, the VAD controller controlling a plurality of implements within the VAD including a light source, and a luminosity sensor with which the VAD controller is configured to perform a VAD health test to confirm that a plurality of parameters of the light source meet or exceed threshold requirements, the plurality of parameters including luminous intensity and luminous profile, wherein the VAD is configured to perform steps including: monitoring for a trigger event to perform the VAD health test, the trigger event including the occurrence of an alarm a condition; activating the light source upon determining that the trigger event has occurred; monitoring the plurality of parameters to determine whether the light source meets or exceeds threshold requirements, and communicating an outcome of the VAD health test.