遥测系统

VBOX 产品之间的无线通讯经常成为客户测试要求中的重要部分。它可以通过蓝牙连接至平板 PC,从而输出活动数据;可传输 DGPS 校正消息至活动的 VBOX 设备,以获取高位置精度;或在 VBOX 之间交换车辆安全系统开发期间露天道路测试的 GPS 测量结果。

选择正确的遥测系统时,通常需要与您的 VBOX 经销商讨论确定哪些设备最适合您的应用 – 关于范围和带宽,以及监管无线电信号传输的本地法律。

DGNSS RTK Base Station

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VBOX Telemetry Radios

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VBOX Bluetooth Module

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VBOX NTRIP Modem

Posted in 遥测系统

NTRIP Modem RLACS250The VBOX NTRIP Modem allows a VBOX 3i RTK to receive positional correction data via Network RTK, without having to use a VBOX Base Station.

Correction messages received via the RTK network can be an advantage if testing is conducted tens of kilometres away from the base station, over large changes in elevation or where topographical obstacles could get in the way.

If RTK coverage is available, the VBOX NTRIP Modem allows for vehicle testing that requires high positional accuracy – such as when validating critical safety systems like AEB/ACC - to be conducted where a VBOX Base Station cannot be deployed.

What is Network RTK?

Network RTK utilises one or more Continuous Operating Reference Stations (CORS) to provide RTK data to a GNSS Rover, usually via mobile internet.

The most common method of Network RTK involves a two-way communication link which allows the roving vehicle to send its position to a service provider that is monitoring satellite observations from several reference stations around a country.

What is NTRIP?

Most network RTK systems are internet based and utilise a protocol called NTRIP (Networked Transport of RTCM via Internet Protocol). A constant internet connection is required to receive corrections, which can be done via a cellular modem, such as VBOX NTRIP, or a smart phone.

How does it work?

The VBOX NTRIP Modem enables the roving VBOX unit to send its position to the stations within the network – just as it would to a single VBOX Base Station. The NTRIP service provider will then calculate the appropriate corrections for the VBOX’s location based on the data from nearby reference stations. This correction information is then returned to the VBOX in the same RTCM format as is used for a single fixed base station.

In order to use this type of correction you have to register and subscribe to a cellular data plan with your local NTRIP provider, such as Topnet in the UK and Germany, Swepos in Sweden or Unavco in the USA.

 

RTK network

Please see RACELOGIC Support for information on modem setup and configuration.

Specification

Power Input: 7 V DC to 24 V DC
Power Consumption: 12 V DC: 75 mA; 18 V DC: 50 mA
Antenna Connection: FME M 50 Ω antenna connector
Size (L x W x H): 76 mm x 56 mm x 25 mm
Weight: 100 g (2.5 oz)
Extended Temperature Range: -40 °C to +75 °C
Bands: Quad-Band (850/9000/1800/1900 MHz), Five Bands UMTS (WCDMA/FDD) 800, 850, 900, 1900 and 2100 MHz

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