Active Reflected Wave Detector for Motion Detection Accuracy
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Solution Overview
Problem
Motion sensors, such as PIR detectors, often trigger false alarms when detecting motion, as they cannot identify the location or type of moving object within their field of view, leading to unnecessary camera activation and power consumption, especially in battery-powered systems.
Innovation Solution
The use of an active reflected wave detector, such as a radar sensor, is employed to improve detection criteria before performing actions like capturing images. This detector measures wave reflections to determine if a predetermined condition, such as the presence of an object or a human, is met within a specific area, thereby reducing false triggers and conserving power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a motion sensor is used to trigger camera capture, then motion detection capability is provided, but false triggers increase and power consumption increases
Solution Approach 1:
The system performs preliminary detection using the motion sensor to identify potential targets before activating the camera. This preliminary action filters out false triggers early in the detection process, ensuring that the power-intensive camera is only activated when motion is detected within the critical zone, thus resolving the contradiction between reliable detection and power consumption.
Solution Approach 2:
The processor acts as an intermediary between the motion sensor and camera, evaluating whether detected motion corresponds to a target within the critical zone before triggering camera capture. This intermediary evaluation layer prevents false triggers from directly activating the camera, thereby reducing unnecessary power consumption while maintaining detection reliability.
2Ease of operation
If a motion sensor is used to trigger camera capture, then motion detection is achieved, but false triggers occur due to inability to identify object location or type
Solution Approach 1:
The detection process is segmented into distinct stages: initial motion detection by the motion sensor, evaluation of whether the motion corresponds to a target within the critical zone by the processor, and camera capture only when conditions are met. This segmentation allows the system to maintain operational simplicity while improving detection accuracy through progressive filtering.
Solution Approach 2:
The system performs preliminary evaluation of detected motion to determine if it corresponds to a target within the critical zone before activating the camera. This preliminary action filters out false triggers caused by unrelated motion, thereby improving detection accuracy without significantly complicating the overall operation.
3Reliability
If the camera captures images frequently in response to motion, then detection coverage is improved, but power consumption increases
Solution Approach 1:
The system applies partial action by capturing images only for motions that meet the critical zone criteria, rather than capturing for all detected motions. This selective approach ensures adequate detection coverage for relevant targets while avoiding the energy waste of capturing images for false triggers or irrelevant motions.
Solution Approach 2:
The processor provides feedback control by evaluating each motion detection event and determining whether it warrants camera activation based on the critical zone criteria. This feedback mechanism ensures that camera capture occurs only when necessary for detection coverage, optimizing the balance between detection reliability and energy conservation.
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 integration of an active reflected wave detector enhances the accuracy of motion detection, reducing false triggers and ensuring that camera actions are only taken when necessary, thereby optimizing power usage and improving the efficiency of security systems.
Implementation Method 1
an active reflected wave detector that is operable to measure wave reflections from the environment
Data Source
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AI summary
An apparatus, method and system for detecting an object in an environment. The apparatus comprises: a processor (202), the processor coupled to an active reflected wave detector (206) that is operable to measure wave reflections from the environment. The processor is configured to: process measured wave reflection data to determine whether a predetermined condition is met, the measured wave reflection data accrued by the processor in response to the active reflected wave detector being activated in response to a motion sensor (204) detecting motion in said environment; and if the predetermined condition is met, perform at least one operation related to camera image data.