Radar Sensor Positioning via Overlapping Detection Zones
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Solution Overview
Problem
Existing motion detection systems, particularly those using radar sensors, are limited in their ability to determine the position of objects within a surveillance area, especially at short distances, and lack simplicity in setup and division of monitored areas into inclusion and exclusion zones.
Innovation Solution
A method and monitoring device utilizing at least two presence or motion sensors arranged at a horizontal distance to receive impulse radar signals, with overlapping detection areas, allowing for position determination within the surveillance area by comparing distance values to stored distance value groups to define inclusion and exclusion areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radar systems are used for distance determination, then position determination capability is improved, but the systems are complex and not suitable for simple building installations
Solution Approach 1:
The surveillance area is segmented into multiple detection zones (first, second, third detection zones) with different sensitivity levels. This allows the system to achieve accurate position determination by comparing signal strengths across multiple zones while keeping each individual sensor simple.
Solution Approach 2:
The patent introduces a spatial dimension to position determination by creating overlapping detection zones at different locations. Instead of using complex radar systems, it uses multiple simple sensors arranged in space, utilizing the spatial dimension to achieve accurate object positioning through signal strength comparison.
2Reliability
If motion detection devices are used to detect movements, then movement detection capability is improved, but the devices cannot determine the position of objects within the surveillance area
Solution Approach 1:
The surveillance area is divided into multiple detection zones with different sensitivity levels. By segmenting the area and using multiple sensors, the system achieves both reliable movement detection and position determination through signal strength comparison across zones.
Solution Approach 2:
The patent uses signal strength as an intermediary parameter to link movement detection with position determination. The varying signal strengths from multiple sensors serve as a mediator that provides positional information without requiring complex radar systems.
3Reliability
If UWB receivers operating at low frequencies are used, then reception capability is improved, but the resolution is not sufficient for position determination applications
Solution Approach 1:
Instead of using a single high-frequency UWB receiver, the system segments the detection task across multiple low-frequency receivers. By comparing signals from multiple receivers, the system achieves sufficient resolution for position determination while maintaining the reliability of low-frequency signal reception.
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
Enables accurate position determination of objects within the surveillance area, suitable for building installations, with simplified setup and operation, allowing for effective monitoring of containment areas and exclusion zones, and efficient actuator control based on object size and movement.
Implementation Method 1
A method and monitoring device are proposed, in particular for use in connection with building installations, with which position determination of an object within a surveillance area can be carried out at short distances
Implementation Method 2
generating and transmitting a radar signal, receiving a signal (received signal) reflected from an object located in the detection range
Implementation Method 3
The sensors are aligned in such a way that their detection area at least partially overlaps with the area which can be detected by both sensors
Data Source
Figure 1~2
Figure 3
AI summary
The method involves generating and transmitting pulse radar signal. An in-detection range of reflected signal is received and evaluated with respect to distance from sensors. The sensors (6,6-1) are aligned and partially overlapped in detectable range for receiving pulse radar signal within assigned detection area (1). The detection area is divided into confinement area (8) and exclusion area by providing boundary (9) at specific location from sensors. A monitoring device located in detection area monitors inside and outside of confinement area and exclusion area. An independent claim is included for a monitoring device.