Presence Sensor Pixel Matrix Background Refresh for Enclosed Pixels
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Solution Overview
Problem
Existing methods for updating background information of pixel matrices in presence sensors fail to effectively update the background temperatures when pixels indicating presence are completely surrounded by other pixels indicating presence, leading to incomplete updating and reduced sensor sensitivity.
Innovation Solution
A method that updates the background information of pixel matrices by sequentially processing pixels indicative of presence, using the temperature values of adjacent pixels not indicating presence and previously updated background temperatures to calculate new background values, ensuring all pixels are updated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the background information is updated using only adjacent pixels not indicating presence, then the updating process is simple, but the updating is incomplete when pixels are completely surrounded by presence-indicating pixels
Solution Approach 1:
The patent applies preliminary action by first identifying and updating pixels that have at least one adjacent pixel not indicating presence, then using these updated pixels as a basis for subsequently updating other pixels that indicate presence. This staged approach ensures that even pixels completely surrounded by presence-indicating pixels can eventually be updated through the iterative process.
Solution Approach 2:
The patent introduces a temporal dimension to the updating process by performing multiple sequential updates. Instead of attempting to update all pixels simultaneously in a single pass, the method performs iterative updates where pixels are updated in stages, allowing information to propagate through the pixel matrix over time until all pixels have been updated.
2Reliability
If multiple iterative updates are performed to ensure complete background updating, then the completeness of updating is improved, but the processing time increases
Solution Approach 1:
The patent segments the pixel matrix into different groups based on their update status. Pixels are divided into those that have been updated and those that remain to be updated. This segmentation allows the system to efficiently track progress and terminate the iterative process as soon as all pixels have been updated, avoiding unnecessary additional iterations.
Solution Approach 2:
The patent implements feedback by continuously monitoring which pixels have been updated and using this information to determine whether further iterations are necessary. The system feeds back the update status to control the continuation of the iterative process, stopping when all pixels have been successfully updated, thus optimizing processing time.
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
This method ensures complete updating of background temperatures in the pixel matrix, enhancing sensor sensitivity by accurately distinguishing between human presence and other heat-emitting elements.
Implementation Method 1
they detect thermal radiation in their surroundings, that is, in their detection area. If thermal radiation is detected in the detection area, for example, caused by a person approaching the presence detector, the presence detector converts the radiation into a measurable electric signal
Data Source
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AI summary
The disclosure refers to methods and systems for updating background information of a pixel matrix generated by presence sensors. The pixel matrix comprises background information of a presence detection field covered by the presence sensor. The method comprises: a) detecting a first set of pixels comprising pixels indicative of presence having adjacent pixels not being indicative of presence; b) for each particular pixel of the first set of pixels, updating (102) a temperature value of the background of the particular pixel of the first set of pixels; c) detecting a second set of pixels comprising pixels indicative of presence that have adjacent pixels previously updated; d) for each particular pixel of the second set of pixels, updating (104) a temperature value of the background of the particular pixel of the second set of pixels; and, e) executing steps c) and d) until there are no more pixels indicative of presence to be updated.