Radar-Triggered PTZ Camera Surveillance Storage
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Solution Overview
Problem
Current network video recorder (NVR) and digital video recorder (DVR) systems face challenges in accurately detecting movement, especially in outdoor environments due to natural phenomena like tree shaking, and often store excessive image data without meaningful triggers, leading to inefficient data storage and time-consuming searches.
Innovation Solution
An apparatus and method that utilize a radar sensor to detect object location and generate camera control signals for PTZ (pan-tilt-zoom) camera control, storing surveillance images with location and time information only when an object intrudes into a preset area, allowing for efficient image storage and rapid search functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image data is continuously recorded without an outside trigger, then complete surveillance coverage is achieved, but data storage space requirement increases to terabyte level
Solution Approach 1:
The system performs preliminary action by pre-defining multiple preset areas in advance before surveillance begins. These preset areas are established beforehand as trigger zones, allowing the system to wait for objects to enter these predefined regions rather than continuously recording all areas. This preliminary setup enables selective recording only when objects intrude into specific zones, significantly reducing storage requirements while maintaining surveillance effectiveness.
2Quantity of substance
If movement detection is performed by analyzing image data, then trigger-based recording is enabled, but detection accuracy deteriorates due to natural phenomena like tree shaking
Solution Approach 1:
The patent replaces the mechanical/optical-based movement detection system (image analysis) with an electromagnetic wave-based detection system (radar). The radar sensor uses electromagnetic waves to detect object movement and generate trigger signals, eliminating the problem of false detection caused by natural phenomena like tree shaking. This substitution maintains trigger-based recording benefits while achieving accurate movement detection regardless of environmental conditions.
3Quantity of substance
If PIR sensor or dual sensor is used for trigger input, then recording trigger capability is provided, but malfunction frequency increases according to surrounding environment
Solution Approach 1:
The patent changes the detection parameter from thermal/infrared-based sensing (PIR sensor) or dual-sensor detection to radar-based electromagnetic wave detection. This parameter change makes the detection system immune to environmental factors that cause PIR sensor malfunctions, such as temperature variations and humidity. The radar sensor operates with different physical principles that are not affected by the same environmental conditions, thereby improving reliability while maintaining selective recording capabilities.
4Reliability
If massive amount of image data is stored due to poor trigger information, then surveillance coverage is maintained, but searching for meaningful information becomes time consuming
Solution Approach 1:
The system extracts only the meaningful portions of surveillance data by using radar-generated trigger signals to initiate recording only when objects of interest enter preset areas. Instead of storing all captured images, the system extracts and stores only those images associated with triggered events. This extraction approach significantly reduces the total data volume while ensuring that stored images contain meaningful information, thereby reducing search time without compromising surveillance effectiveness.
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 reduces unnecessary data storage, enhances movement detection accuracy, and enables fast image retrieval by using radar sensor information as triggers, optimizing storage and search processes in surveillance systems.
Implementation Method 1
location information about an object detected by a radar sensor
Data Source
AI summary
An apparatus and method of storing and searching for an image are provided. The apparatus includes: a first signal processor which receives location information about an object detected by a sensor, generates and transmits a camera control signal to a camera based on the location information so that the camera performs a surveillance in a direction according to the camera control signal, and receives from the sensor an alarm signal notifying an intrusion of the object into a preset area; a second signal processor which receives a surveillance image of the intruding object received from the surveillance of the camera; and a control unit which stores the surveillance image in a storage unit.