Motion Detection Device with Image Capture Mode Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motion detection systems face issues with false alarms and inefficiencies in energy usage and reaction time due to delays in image capture and exposure adjustments after detecting unusual temperature variations.
Innovation Solution
A motion detection device with an image capturing unit and operating processor that switches between sleep and wakeup modes to capture low-quality images for initial analysis, actuating an external host, and then transitions to high-quality image capture and recording when an object is confirmed, thereby reducing start-up time and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the passive detector detects temperature variation and triggers the external host and image detection device, then the system can detect unusual states, but the image detection device captures monitoring images at a later time due to wakeup periods and exposure adjustment periods, causing delayed reaction
Solution Approach 1:
The image detection device performs exposure adjustment in advance during low frame rate periods before actual motion detection occurs. This preliminary action ensures that when motion is detected and the device needs to capture images, the exposure parameters are already optimized, eliminating the delay caused by exposure adjustment during the wakeup period and enabling immediate reaction without compromising image quality
Solution Approach 2:
The system dynamically adjusts the frame rate of the image detection device between low frame rate and high frame rate modes. During normal periods, it operates at low frame rate to perform preliminary exposure adjustment and save energy. When motion is detected, it switches to high frame rate for immediate high-quality image capture, thus resolving the contradiction between quick reaction and detection accuracy
2Loss of time
If the image detection device operates continuously at high frame rate to capture monitoring images immediately, then the reaction time is reduced, but the energy consumption increases significantly
Solution Approach 1:
The image detection device operates periodically at low frame rate to capture background images and perform exposure adjustment, then switches to high frame rate only when motion is detected. This periodic operation pattern reduces energy consumption significantly compared to continuous high frame rate operation, while still enabling quick reaction when needed
Solution Approach 2:
The system performs exposure adjustment and background image capture in advance during low frame rate operation. This preliminary action prepares the system for immediate high-quality image capture when motion is detected, reducing start-up time without requiring continuous high power operation
3Loss of energy
If the system waits for the external host to wake up and complete exposure adjustments before capturing images, then energy is saved, but the monitoring video cannot be recorded right after detection
Solution Approach 1:
The image detection device performs exposure adjustment in advance during low frame rate operation before the external host needs to wake up. This preliminary action ensures that when motion is detected and the external host wakes up, the exposure parameters are already optimized and the device can immediately capture and record high-quality monitoring videos without waiting
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 solution effectively prevents false alarms and enhances energy economy by allowing immediate reaction to detected events without waiting for the external host to wake up or complete exposure adjustments, ensuring accurate image analysis and timely recording of monitoring videos.
Implementation Method 1
an image capturing unit and an operating processor. The operating processor is electrically connected with the image capturing unit
Data Source
AI summary
A motion detection device is matched with a passive detector utilized to detect an object and to accordingly generate a triggering signal. The motion detection device includes an image capturing unit and an operating processor. The operating processor is electrically connected with the image capturing unit, the operating processor is adapted to switch the image capturing unit from a sleep mode to a wakeup mode for motion detection while being triggered by the triggering signal, and further to optionally actuate an external host in accordance with an analysis result of the motion detection. A motion detection method applied to the motion detection device includes receiving the triggering signal, switching the image capturing unit to the wakeup mode for capturing the first monitoring image, analyzing the first monitoring image to determine existence of the object, and actuating the external host in accordance with an analysis result of the first monitoring image.