Infrared intrusion detection system (IRIDS)
| DWPI Title: Infrared (IR) intrusion detection system for intrusion detection sensing, has computer that generates output signal in response to detecting movement of object above predetermined threshold |
| Abstract: A system and method for intrusion detection includes an imager directed towards an object in an interior space. The imager is in data communication with a computer. The computer is arranged to process digital three-dimensional image data received from the imager and programmed to execute a change detection algorithm in response to the processed three-dimensional data to determine movement of the object. The computer generates an alarm output in response to detecting movement of the object above a predetermined threshold. The method includes providing an imager directed towards an object in an interior space; receiving Time of Flight signals by the imager; processing digital three-dimensional image data received from the imager; and executing a change detection algorithm in response to the processed three-dimensional data to determine movement of the object. |
| Use: System for infrared intrusion detectionfor used in security field in industry, energy, aerospace and united states government facilities. Can also be used in door entry detection. |
| Advantage: The IRIDS provides improved performance over passive infrared (PIR) with respect to nuisance alarm, without a loss in detection performance. The system is low cost and open source nature of the available software development tools that enable software developer tools for point cloud imagers. No custom hardware is needed to attach the sensor to the door resulting in easy installation and calibration for high security doors. No visible light image is created by the IRIDS, a useful feature in classified environments. A reliable algorithm can differentiate movement associated with door vibration from movement caused when opening a door. |
| Novelty: The system has an imager directed towards an object in an interior space. A computer is configured to process (106) digital three-dimensional image data received from the imager. A change detection algorithm is executed (108) in response to the processed three-dimensional data to determine movement of the object. An output signal is generated in response to detecting movement of the object above a predetermined threshold. The change detection algorithm comprises a first phase and a second phase. The first phase is configured to gather a base-line data, and the second phase to detect an alarm condition. The first phase is configured to continually approximate a depth of each pixel on a sensor using an exponential smoothing approach, calculates a maximum deviation of the respective frame from exponentially smoothed depth measurement, and generates an estimated convolved error between a scene movement and noise within the sensor associated with a respective pixel. |
| Filed: 8/8/2019 |
| Application Number: US16535236A |
| Tech ID: SD 13441.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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