Microwave Sensor Lighting Self-Test for False Trigger Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Microwave sensing modules in lighting devices are prone to self-excitation due to ripple interference or environmental factors, leading to erroneous detection signals and malfunctioning of object detection functions, causing unnecessary activation even when no moving object is detected.
Innovation Solution
The lighting device incorporates a communication module, memory module, microwave sensing module, control module, and light-emitting module, with an aging table and suspect count to self-test for self-excitation, adjusting sensitivity or deactivating the microwave sensing module when self-excitation occurs, ensuring accurate detection signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the microwave sensing module is used to detect moving objects, then the lighting device can activate upon detecting objects in target areas, but the microwave sensing module is prone to self-excitation due to ripple interference or environmental factors, leading to erroneous detection signals and malfunctioning
Solution Approach 1:
The patent applies preliminary action by recording trigger records in an aging table before making detection decisions. The control module checks the aging table to verify whether trigger records exist within a preset time interval before activating the lighting device, preventing self-excitation errors from causing false activations
Solution Approach 2:
The patent implements feedback by having the control module continuously monitor and verify detection signals against historical data in the aging table. When a detection signal is received, the system checks whether similar triggers occurred recently, and only activates the lighting device if the current trigger is validated as legitimate, creating a feedback loop that filters erroneous signals
2Ease of operation
If the lighting device activates upon erroneous detection signals, then the lighting device may activate even when no moving object is detected, but this causes unnecessary energy consumption and system malfunction
Solution Approach 1:
The system performs preliminary verification by checking the aging table for existing trigger records before activating the lighting device. This preliminary check prevents unnecessary activation when no moving object is detected, avoiding wasted energy consumption
Solution Approach 2:
The control module uses feedback from the aging table to validate detection signals. By comparing current detection signals with historical trigger records, the system determines whether activation is necessary, preventing energy waste from false positives
3Measurement precision
If the microwave sensing module operates with high sensitivity, then the object detection function can detect moving objects accurately, but the module becomes more susceptible to self-excitation from ripple interference or environmental factors
Solution Approach 1:
The patent applies preliminary action by establishing a verification mechanism using the aging table before responding to detection signals. The control module checks whether trigger records exist within the preset time interval, providing a preliminary filter that prevents high-sensitivity detection from triggering on interference rather than actual objects
Solution Approach 2:
The system implements feedback by continuously monitoring detection signals against historical data. The control module uses the aging table to provide feedback on whether similar triggers have occurred recently, allowing the system to distinguish between legitimate high-sensitivity detections and false positives from interference
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 self-testing mechanism enhances precision and prevents faulty lighting devices from affecting the group sensing function, ensuring normal operation of the lighting system and broader applications in intelligent systems without significant cost increase.
Implementation Method 1
a microwave sensing module, a control module, and a light-emitting module; The microwave sensing module detects a moving object and generates a detection signal
Data Source
AI summary
The present invention provides a lighting device and the self-testing method thereof. The lighting device includes a communication module, a memory module, a microwave sensing module, a control module, and a light-emitting module. The memory module is connected to the communication module and stores an aging table and a suspect count. The microwave sensing module detects a moving object and generates a detection signal. The control module is connected to the communication module, the microwave sensing module, and the memory module. The light-emitting module is connected to the control module. The control module checks the aging table when the microwave sensing module generates the detection signal, and sets the suspect count to an initial value when determining that a preset number of the trigger records exist within a time window. The control module generates the activation signal to activate the light-emitting module, and broadcasts the activation signal.