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Chapter 1
RTMS Options
The standard RTMS G4 Model K4 offers the following:
•
K-band (24.125 GHz)
•
Low Voltage Power 12-24V AC or DC
•
8MB Internal Data Storage Memory
•
RS-232/485 Serial Interfaces
RTMS may be ordered with the following data communication options:
•
Bluetooth Setup Wireless Interface
•
Additional RS-232/422 Serial Interface
•
Integrated Digital Spread Spectrum (DSS) Transceiver
•
Integrated Cellular Modem: CDMA/GPRS/WiFi
•
Integrated TCP/IP Ethernet Interface
•
Integrated NTCIP 1209 Communications Protocol Module
•
Integrated IP Video Camera
•
Contact Closure for 8 and 16 Zones
The following power options are available:
•
115V AC
Introduction to the RTMS
The RTMS G4 (Remote Traffic Microwave Sensor — 4th Generation) is a true RADAR
device, designed for traffic sensing applications. It measures the distance to objects in the path
of its microwave beam. The ranging capability allows the RTMS to detect stationary and
moving vehicles in multiple detection zones. When pointed onto a roadway, the RTMS
microwave beam projects an oval footprint. Its range is divided into multiple micro-slices, in
which vehicles are detected.
The RTMS receives reflected signals from all surfaces within its beam—pavement, barriers,
vehicles and trees. It maintains a background signal level from fixed objects in each micro-
slice. Vehicles are detected when their reflected signal exceeds the background level in their
micro-slice by a certain threshold level. If that detection is part of a defined zone, its contact
(optional) is closed during the detection time to indicate detection and internal counters are
incremented. Statistical measurements are available through two ports, including optional IP
and Radio modems.
G4 User Manual
About the G4 System
© 2009 ISS Canada.
1-5
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