With changing times, there has been tremendous development and advancement of technologies in terms of Vehicle detection. With the implementation of such advanced systems, the traffic movements become smoother and effective resulting in lesser waiting time at a junction. The Traffic controller needs vehicle detectors to provide accurate information about the prevailing traffic conditions in real time and this makes the roles of various Vehicle Detection Sensors very vital.
There are wide ranges of Sensors available as of date, most commonly used one are as follows:
THE SENSYS NETWORKS VDS240 WIRELESS VEHICLE DETECTION SYSTEM
uses wireless magneto-resistive sensors to detect the presence and movement of vehicles. The sensors – installed in holes cored in the roadway and covered with epoxy – transmit detection data in real-time via low-power radio technology to a nearby Sensys Networks access point. Vehicle detections are further relayed to a traffic signal controller, remote traffic management center, or other system.
The FlexMag Flush and Deep sensor
developed by Sensys Networks utilizes the next generation of RF chipsets and circuitry. The FlexMag Flush sensors are installed flush with the roadway surface in plastic shells. The plastic shells enable the removal and replacement of sensors during roadway milling operations. The FlexMag Deep sensors are installed without plastic shells at depth of up to 4.25 inches (10.8 cm) from the roadway surface to the top of the sensor. Sensors installed at these depths do not have to be removed and replaced during most roadway milling operations. In typical traffic management applications, a sensor is placed in the middle of a traffic lane to detect the presence and passage of vehicles. Vehicle speeds and length are measured by two sensors installed in the same lane with the exact distance between them configured in software. The recommended distance between sensors depends on the range of expected speeds to be measured: for typical freeway applications, a separation of 20 to 24 feet (6.1 to 7.3 meters) is recommended; for typical arterial applications, a separation of 10 to 12 feet (3.1 to 3.7 meters) is preferred.
Advanced Magnetometer-Based Vehicle Detection
The state-of-the-art magneto-resistive sensing devices in each wireless sensor measure the x-, y-, and z-axis components of the Earth’s magnetic field at a 128 Hz sampling rate. As vehicles come within range, changes in the x, y, or z axes of the measured magnetic field become apparent. When no vehicles are present, sensors continually measure the background magnetic field to estimate a reference. Each sensor automatically self-calibrates to the local environment, and to any long- term variations of the local magnetic field, by allowing this reference value to change over time.
Overview
Flexible, dependable, low-cost, the Sensys Networks wireless vehicle detection system uses magneto-resistive wireless sensors to detect vehicle presence and movement. Virtually maintenance free, our FlexMag sensors install in minutes, and deploy in a matter of hours, transmitting real-time data for a variety of traffic management applications.
FEATURES
- Wireless in-pavement or below bridge deck installation
- Longer expected life than your average loop
- Impervious to weather
- Rapid installation and deployment reduces road closures and worker exposure
- Patented, ultra-low “NanoPower” communications protocol
- Superior accuracy, dependability, and extensibility
- Universal platform for all traffic detection applications
- Self-calibrating, self-tuning
- Re-usable and remotely upgradeable
- Easily deployed in complex configurations
- Capable of over 300 million detections
- Ability to enable temperature reporting
● New digital radio chipsets for better RF performance and range
● Larger batteries and reduced power consumptions yield longer expected life in all conditions and for all applications
● Sampling rate: 32/128 Hz
● Reliable 2-way radio communications with Sensys Networks gateways
TRAFFIC RADAR SENSORS:-
smartmicro sensors for intersection applications (stop bar and advance detection), highway applications (counting and classification), enforcement applications (speed and red light) and for smart cities.
smartmicro offers robust 4D/UHD radars for traffic management applications, that work in adverse conditions, almost unaffected by weather. One single sensor provides Cartesian coordinates, velocity vector, range and azimuth angle simultaneously for all traffic objects within the field of view. smartmicro technology features most advanced multi-lane and multi-object tracking. The sensors achieve highest detection performance, excellent counting accuracy and classification of moving and stopped traffic – no matter if the road is straight or curved.
XCAM-P™ – PRESENCE DETECTION VIDEO SENSOR
XCam-p, an above-ground sensor for seamless replacement of inductive loops. XCam-p is a presence detection sensor designed to replace or expand upon inductive loops. Designed and optimized for intersections and on-ramps, XCam-p is an above-ground detector that eliminates constraints imposed by embedded loops upon installation and maintenance: lane closure, cutting road surface, etc.
XCam-p is IP addressable and can directy communicate over IP to Cross Traffic Signal Controller
XCam-p features a WDR (Wide Dynamic Range) CMOS sensor and an image optimization module to enhance detection performances in any lighting conditions. With low-power consumption and wireless capabilities (optional), XCam-p provides unrivaled seamless installation
Features & Technical Specifications
● Stop bar / Advanced / mid-block detection
● Ethernet and RS485 communications, IP addressable
● Color video streaming including OSD for detection zone status display
● PC based Configuration and monitoring tool: XCamMonitoring
● Fail-safe outputs
● Digital zoom
● Above-ground detector
● High accuracy in all weather and lighting conditions
● Digital zoom allows seamless installation on the field
● Minimum illumination 0.04 lux @ f/1.2
● Anti-blooming, zero smearing
● Signal to Noise ratio: >50dB
● Sun shield for hot climate anddirect sun exposure (option)
● Size: 132 x 254 x 124 mm
● Power consumption: 3W
● -34°C / +74°C
● Operating temperature: -34°C / +74°C
● Humidity: 0 to 95% RH, non-condensing
● Weight: 600g
● Output to Citilog XCom: Ethernet or RS485
● Citilog SDK: XML
● Other standard protocols DIASER, Modbus…
● Wireless communication module (option)
FLIR TRAFFIONE THERMAL VIDEO DETECTION
FLIR TrafiOne is an all-round detection sensor for traffic monitoring and dynamic traffic signal control. Offered in a compact and affordable package, the FLIR TrafiOne uses thermal imaging and Wi-Fi tracking technology to provide traffic engineers with high-resolution data on vehicles, bicycles and pedestrians at intersections and in urban environments.
FLIR TrafiOne helps traffic engineers to improve traffic flows, reduce vehicle idling time, monitor congestion, enhance safety for vulnerable road users, collect data and measure travel & delay times for different transport modes.
THERMAL IMAGING SENSOR
FLIR TrafiOne uses thermal imaging to detect the presence of pedestrians and bicyclists that are approaching or waiting at the curbside or walking on the crossing. Thermal imaging cameras can see in total darkness, through shadows and sun glare, and thus provide reliable traffic detection 24/7. FLIR TrafiOne is connected to the traffic signal controller via dry contact outputs or via TCP/IP network communication to allow for a more dynamic control of traffic signals based on presence or volume information.
WI-FI TRACKING
FLIR TrafiOne has optional Wi-Fi tracking technology that can be used to capture traffic flow data. By monitoring Wi-Fi Mac addresses of Wi-Fi enabled devices such as smartphones, TrafiOne can determine travel & route times along road segments. Via Wi-Fi signal strength information TrafiOne can also measure queue delay times at intersections.
FLIR CLOUD ANALYSIS
The information collected by TrafiOne can be accessed for further analysis by FLIR’s cloud-based analysis solution. Smart analytics transform the data into useful traffic insights, critical to understand the road network performance. Traffic engineers can use the user-friendly dashboard to generate reports and start taking measures where they are needed.
KEY BENEFITS
• ALL-IN-ONE SENSOR
• 24/7 DETECTION AND IN VARIOUS WEATHER CONDITIONS, NO NEED FOR ADDITIONAL LIGHTING
• LOW MAINTENANCE
• SIMPLE AND QUICK CONFIGURATION OVER SECURE WI-FI CONNECTION
• WI-FI MONITORING CAPABILITIES (OPTIONAL)
• VISUAL HD STREAM (OPTIONAL)
