Dual-Sensor Object Detection with Time-Window Verification
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Solution Overview
Problem
Current security surveillance systems often misjudge the presence of objects, leading to inaccurate detection and unnecessary power dissipation due to reliance on single detection mechanisms.
Innovation Solution
An object detection apparatus and method utilizing a cooperative detecting mechanism between an image sensor and an infrared sensor, where a time counting process is initialized upon detection of either sensor's signal, generating an object detection signal only when the other sensor's signal is detected within a predetermined time period, thereby reducing misjudgment and power dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single detection mechanism (image sensor or infrared sensor) is used, then the device complexity is reduced, but the detection accuracy deteriorates due to misjudgment
Solution Approach 1:
The patent combines image sensor detection and infrared sensor detection into a unified detection system. The motion detection circuit processes image signals while the infrared control circuit processes infrared signals, and both circuits work together to confirm object presence, thereby improving detection accuracy without requiring separate independent systems.
Solution Approach 2:
The confirming circuit acts as an intermediary that coordinates between the motion detection circuit and infrared control circuit. It initializes a time counting process when one sensor detects an object and verifies the other sensor's detection within a predetermined time period, serving as a mediator that integrates both detection mechanisms.
2Measurement precision
If dual-sensor detection is implemented, then the detection accuracy is improved, but the power consumption increases due to continuous monitoring
Solution Approach 1:
The system implements periodic action by initializing the time counting process only when one sensor detects an object, rather than continuously monitoring both sensors simultaneously. The confirming circuit checks for the other sensor's signal within a predetermined time period after initialization, reducing power consumption while maintaining detection accuracy.
Solution Approach 2:
The detection system is self-regulating through the time counting mechanism. When one sensor detects an object, the system automatically initiates verification with the other sensor within a predetermined time period. If the other sensor does not detect within this period, the system concludes no object is present, eliminating the need for continuous dual-sensor monitoring and reducing power consumption.
3Reliability
If continuous monitoring of both sensors is performed, then the detection reliability is improved, but the loss of energy increases
Solution Approach 1:
The confirming circuit performs preliminary action by initializing the time counting process when one sensor detects an object. This preliminary initialization allows the system to then verify the other sensor's detection within a predetermined time period, ensuring reliable detection while avoiding continuous monitoring and the associated energy loss.
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 approach significantly reduces misjudgment and avoids unnecessary power dissipation by confirming object presence through dual-sensor detection, enhancing the accuracy and efficiency of the surveillance system.
Implementation Method 1
A motion detection circuit 110 is configured to detect an image signal IS received from an image sensor 140 to generate an image detection signal IDS when an image variation is detected
Implementation Method 2
an infrared control circuit 120 is configured to detect an infrared signal FS received from an infrared sensor 150 to generate an infrared detection signal FDS when an infrared energy variation is detected
Data Source
AI summary
The present disclosure discloses an object detection method used in an object detection apparatus that includes the steps outlined below. An image signal received from an image sensor is detected to generate an image detection signal when an image variation is detected. An infrared signal received from an infrared sensor is detected to generate an infrared detection signal when an infrared energy variation is detected. A time counting process is initialized when the image detection signal is generated. An object detection signal is generated when the infrared detection signal is generated within a predetermined time period after the time counting process is initialized. A detection distance of the image sensor is larger than a detection distance of the infrared sensor.