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
24
Li-SOCl2 3.6v 7.2ah
dimensions
weight
7.6cm×7.6cm×5.6cm
0.3kg
3
environment IP67
operating temp -40℃ to 85℃
humidity ≤95%
2 Repeater
2.1 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-RP Repeater. In cases where one or more installed wireless
vehicle detectors are out of range of the nearest access point, one or more repeaters
can be used to provide a two-way relay between the out-of-range detectors and the
access point. As many as two repeaters operating in tandem can be installed between a
detector and the access point. To simplify its deployment, a repeater is
battery-powered and thus requires no wires or cabling. A repeater extends the range
and coverage of an installation’s access point. Mounted by the roadside on a pole or
other structure, the repeater must be positioned so that both the detectors to be
supported by the repeater and the communicating repeater or access point are within
view ant within range.
2.2 Appearance
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2.3 Interface
The repeater has no external interface, only have a 3.6v built-in battery interface.
2.4 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 Li-SOCl2 3.6v 7.2ah
dimensions 11.5cm×7.5cm×16cm
environment IP67
operating temp -40 to 85℃℃
humidity ≤95%
405-2480MHz
2
5
3 Access Point
3.1 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 Access Point is an intelligent device operating under the Linux operating
system that maintains two-way wireless links to a vehicle detection system’s detectors
and repeaters, establishes overall time synchronization, transmits configuration
commands and message acknowledgements, and receives and processes data from the
detectors. The access point then uses either wired or wireless connections (or both) to
replay the detection data to a roadside traffic controller or remote server, traffic
management system, or other vehicle detection applications.
An access point uses a single cable to support 10Base-T Ethernet
communications as well as DC power input and, in some versions, serial
communications to the contact closure card that furnishes the interface to standard
traffic controllers.
3.2 Appearance
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3.3 Interface
The access point has only one network interface, which contains the
communication mode: RS485 and Ethernet.
The interface pins are defined as follows:
1 LAN_TX+
2 LAN_TX-
3 LAN_RX+
4 RS485+
5 RS485-
6 LAN_RX-
7 GND
8 +48V
The device board has two network interfaces (RS485 interface and Ethernet
interface).
RS485 interface pin is defined as follows:
1 RS485+
2 RS485-
3
4 GND
5
6
7
8 +48V
Ethernet interface pin is defined as follows:
1 LAN_TX+
2 LAN_TX-
3 LAN_RX+
4 GND
5 GND
7
6 LAN_RX-
7 +48V
8 +48V
3.4 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 POE
dimensions 15cm×7.5cm×20cm
environment IP67
operating temp -40 to 85℃℃
humidity ≤95%
405-2480MHz
2
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Federal Communications Commission (FCC) Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired operation.
Note: This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications. However, there is
no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
●Reorient or relocate the receiving antenna.
●Increase the separation between the equipment and receiver.
●Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
●Consult the dealer or an experienced radio/TV technician for help.
Warning: Changes or modifications made to this device not expressly approved by Wuxi
Wintrans Information Technology Co., Ltd may void the FCC authorization to operate this
device.
Note: The manufacturer is not responsible for any radio or TV interference caused by
unauthorized modifications to this equipment. Such modifications could void the user’s
authority to operate the equipment.
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