Wuxi Wintrans Information Technology WVD024 S User Manual

Manual

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1 Wir eless vehicle detector

1.1 Introduction

The Wintrans WVD024 Wireless Vehicle Detection System uses wireless

vehicle detectors to detect the presence and movement of vehicles. The detectors

Installed on the surface or in small holes cored in the roadway transmit detections data

in real-time via low-power radio technology to a nearby access point. Vehicle

detections are further relayed to a traffic signal controller, remote traffic management

center, or other system.

The WVD024-S wireless vehicle detector combine a magnetometer and a

low-power radio in a small, hardened plastic case suitable for installation directly in

the pavement. In typical traffic management application, a detector 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 detectors installed in the same lane with the exact

distance between them configured in software. The recommended distance between

detectors depends on the range of expected speeds to be measured: for typical freeway

applications, a separation of 20 to 24 feet is recommended; for typical arterial

applications, a separation of 10 to 12 feet is preferred. The magneto-resistive sensing

devices in each wireless detector measure the x-, y-, and z-axis components of the

Earth’s magnetic field at a 128Hz 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, detectors continually measure the background magnetic field

to estimate a reference. Each detector 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.

It provides information about the arrival and departure of front-end vehicles for

the access point (AP) or repeater (RP) of the Wintrans Wireless Vehicle Detection

System. It receives the commands such as the parameter modification, the system

upgrade from the AP or the RP.

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1.2 Appearance

1.3 Interface

The detector has no external interface, only have a 3.6v built-in battery

interface.

1.4 Technical Parameters

physical layer protocol IEEE 802.15.4PHY

over-the-air-protocol Wintrans NanoPower protocol

frequency band

frequency channels 16

frequency bandwidth 2MHz

transmit/receive bit rate 250 kbps

antenna type ceramic patch antenna

antenna field of view ±60°

typical receive sensitivity -101dBm

power supply

05-2480MHz

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Li-SOCl2 3.6v 7.2ah

dimensions

weight

7.6cm×7.6cm×5.6cm

0.3kg

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