User's Manual

1608 4th Street Suite 200 Berkeley CA 94710
|
www.sensysnetworks.com/resources
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P 510.548.4620 F 510.548.8264
Functions / Features (cont.)
Relay of sensor data (cont.)
• Via IP connectivity (wired or wireless) to trac
management systems, upstream servers, etc.
Processing of sensor data
• Per-lane or per-vehicle data
• Data binning over selectable time intervals
• Data ltering (e.g., adaptive holdover)
Storage of sensor data
• Data buering (event caching)
• Data storage (processed data)
Master timebase for all supported wireless sensors
• Common clock for sensor timestamps
• Can be synchronized to NIST timing signals
Radio signal quality measurements
• Receive Signal Strength Indicator (RSSI, in dBm)
• Link Quality Index (LQI, gure of merit 40-99)
Firmware upgrades
• Upgrades via IP connectivity or via local PC connection
• Delivers upgrades to all other Sensys Networks devices
Simple installation
• Any roadside location that provides adequate signal
coverage to sensors/repeaters
• No special requirements regarding setback or mounting
stability
Enclosure
• Robust protection against outside environment
• Cable connects straight to board, removing one bulkhead
connection on the outside of enclosure
Software Compatibility
• Requires TracDOT software 2.12.7 or later
FlexAP
The Sensys Networks VDS240 Wireless Vehicle Detection System
uses pavement-mounted magnetometer or MicroRadar
®
sensors
to detect the presence and movement of vehicles and bicycles. The
magnetometer and MicroRadar
®
sensors are wireless, transmitting their
detection data in real-time via low-power radio technology to a nearby
Sensys Networks access point that then relays the data to one or more
local or remote trac management controllers and systems.
The Sensys Networks FlexAP is an intelligent device operating under
the Linux operating system that maintains two-way wireless links to
a vehicle detection system’s sensors and repeaters, establishes overall
time synchronization, transmits conguration commands and message
acknowledgements, and receives and processes data from the sensors.
The FlexAP then relays the sensor detection data to a roadside trac
controller or remote server, trac management system, or other vehicle
detection application.
The FlexAP is the second generation of Sensys Networks access points
and replaces the AP240. The FlexAP includes a higher sensitivity
radio for more robust wireless links and more processing and memory
capacity for additional applications. The FlexAP is housed in a robust
enclosure that provides excellent protection against the environment.
Types of FlexAPs. A FlexAP uses a single cable to support
10/100Base-T Ethernet communications and, in some versions,
serial communications to the contact closure card that furnishes the
interface to standard trac controllers.
FLEX-AP-S, FLEX-AP-ES
• RJ45 port supports serial interface to Contact Closure card
(CC card) for relay of vehicle detection output via the EX cards or
FlexConnect SDLC link
• Supports Ethernet interface for eld conguration (via Sensys
Networks AccessBox)
• Statistics processing of sensor detection data only in FLEX-AP-ES
• 48VDC power input from CC card via RJ45 port
FLEX-AP-D, FLEX-AP-ED
• RJ45 port supports Power-over-Ethernet (PoE) interface for relay
of detection data directly to controller
• Supports eld conguration over the Ethernet interface
• Statistics processing of sensor detection data only in FLEX-AP-ED
• 48VDC power input from PoE interface (adapter required)
Functions / Features
Sensys Networks radio communications
• To/from wireless sensors
• To/from repeaters
Relay of sensor data
• Via contact closure signals, FlexConnect SDLC link, or Ethernet
interface to trac controller