Radar-Based Intruder Detection for a Rob

Radar-Based Intruder Detection for a Robotic Security System : 

Radar-Based Intruder Detection for a Robotic Security System Submitted By M.Neranjana And A.S.Kaleel Ibrahim Department of Applied Science Muthayammal Engineering College

Abstract : 

Abstract The Mobile Detection Assessment and Response System, Exterior (MDARS-E) provides an automated robotic security capability for storage yards, petroleum tank farms, rail yards, and arsenals. The system equipped with intrusion detection, barrier assessment, and inventory assessment subsystems. The system can detect a crawling, walking, or running intruder at a distance of 100 meters, even in darkness or the presence of smoke, fog, dust, and precipitation. It simultaneously minimizing the number of nuisance alarms.

Introduction : 

Introduction This system has two layers 1)First Layer : The primary layer utilizes an infrared/vision- based (FLIR) system, which provides high angular resolution of a suspected intruder location within a scene. 2) Second Layer : A long-range broad-area radar sensor, is thus optimally positioned to confirm the presence of any valid moving target, effectively eliminating nuisance alarms.

REQUIREMENTS : 

REQUIREMENTS 1.Have a desired probability of detection (Pd) no less than 0.95 for level A (Maximum Level Security) and B (Advanced Level) facilities, and 0.90 for level C (Intermediate Level) and D (Basic Level) facilities. 2.Detect the motion of a human intruder when the MDARS-E platform is stationary 3. Have a nuisance alarm rate (NAR) and false alarm rate (FAR) not to exceed one per MDARS-E platform per shift. 4.Have an image-assessment capability to penetrate smoke, fog, dust, and precipitation.

INTRUDER DETECTION : 

INTRUDER DETECTION It is to reliably indicate the presence of an actual intruder, while minimizing the number of false and nuisance alarms reported to the system operator. It periodically stops at randomly selected locations to search for intruders, performing a step-and-stare function Once stabilized, the vision system searches for any motion within its field-of-view. If no motion is detected, the turret is repositioned so that the vision system can look at the adjacent wedge-shaped sector for motion If motion is detected, a track file is started that describes the location of the potential threat, its pixel geometry, and its persistence.

USER INTERFACE : 

USER INTERFACE The system is designed to run automatically with minimal human oversight. When an IDS alarm is reported, an audible synthesized-speech announcement is made to capture the user’s attention. This information, along with an intruder icon, is posted in the Status Window

WHY RADAR FOR INTRUDER DETECTION? : 

WHY RADAR FOR INTRUDER DETECTION? Existing detection has inability to sense through smoke, dust, fog, and haze. Microwave energy, widely used in military surveillance radar, navigational equipment. Ideal for long-distance sensing which minimize atmospheric attenuation and blocking by precipitation and other adverse weather conditions. Returning energy reflected from a target is detected and processed to determine round-trip distance as a function of elapsed propagation time.

Block Diagram : 

Block Diagram Doppler Radar Front End Processing Electronic Radar Ping Radar Returns Run Halt Intruder Report Tring out Tring in q I Ref Each interval sampled for a single ping thus represents a range bin corresponding to a specific target distance.

MDARS MILLIMETER PULSED-DOPPLER RADAR : 

MDARS MILLIMETER PULSED-DOPPLER RADAR Each of the velocity spectrums are normalized so that peaks from one range bin can be compared against peaks in another when searching for the largest Doppler radar return. The radar system sequences through each antenna, collecting 2048 samples for each of the 30 range bins per antenna. A throughput rate of 100 milliseconds per antenna can be sustained by the processing electronics.

MDARS MILLIMETER PULSED-DOPPLER RADAR : 

MDARS MILLIMETER PULSED-DOPPLER RADAR The Doppler pulse was sized to spread over multiple range bins to ensure that a moving target anywhere. The quantity VC is the speed of light, FSS is the sampling frequency of the radar signal, and their quotient is divided by 2 due to the round trip path followed by the transmitted signal. Each returning Doppler pulse is sampled 30 times in order to achieve a maximum detectable range of 375 feet

Slide 12: 

Block Diagram of Radar processing electronics

Intruder’s location identification : 

Intruder’s location identification

CONCLUSION : 

CONCLUSION The radar system has performed well in measuring the velocity and distance to targets and detecting target motion, both radial and tangential to the radar antenna. It is possible to positively detect a human crawling even in a tangential fashion at a distance of 100 meters. It can work effectively even in darkness or the presence of smoke, fog, dust, and precipitation.

Thank You… : 

Thank You…