GPS Simulation

Posted in Applications

“We believe that many companies in the GPS Industry could enjoy huge benefits from using a simulator; our goal is to make this fact known, and then show that the process isn’t difficult or expensive.”

Visit www.labsat.co.uk for more information on our GPS simulator range.

Why simulate GNSS signals?

GPSDuring the development and testing of electronic systems incorporating global navigation satellite systems such as GPS, Galileo, BeiDou or GLONASS, it is very useful to have position, velocity and time data being fed into the system under test, to evaluate how well the system operates.

Static GPS Testing

If you are interested only in static tests, then you can use a live antenna to provide the feed to the GPS engine. The disadvantage of this method is that the signal changes all the time, so you can't reproduce the same conditions twice.

By using GPS simulation you get the same signal strengths, satellite numbers, atmospheric effects and UTC time whenever the test is run, making benchmarking and testing much more consistent.

Dynamic GPS Testing

If your application involves moving the system under test, to assess it in a dynamic environment, then normally you would need to fit your electronics to the target vehicle or aircraft, and test in the field. This is expensive and time consuming, and conditions change each time the procedure is run.

By using a GPS simulator with a dynamic scenario, you can replay the moving data directly into the GPS engine under test as many times as you like.

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How to make GNSS testing realistic yet repeatable

If you have a very specific dynamic test, you have several options:
  • Record from a live antenna, using a GPS RF Recorder
  • Create the scenario artificially using a user defined trajectory and then replay through a GPS RF Replay unit
  • Use a dedicated full constellation simulator
With these methods, the GPS data is identical every time the test is run - including all of the signal strengths, the number of satellites in view, the time of the test, and the exact path taken by the vehicle.

You save a lot of time, expense, and inaccuracies by testing on the bench rather than taking the system out in the field each time!

What GPS simulators are available?

There are three types of simulator:

  • GPS engine simulators
  • RF signal record/replay simulators
  • Full constellation simulators

GPS Engine Simulators

GPS engine simulators are the most basic option, and generate the same output as a GPS / GLONASS engine, normally in the form of a serial NMEA type message. To use this kind of simulator, the GNSS engine is removed completely from the target system and the signals are injected into the rest of the circuit. These are used mainly by system integrators who are not interested in the performance of the GNSS engine itself. These simulators are generally software, and output data on a serial port.

LabSat3-SatNavGPS RF Record / Replay systems

RF record/replay systems, such as RACELOGIC’s LabSat, sample the RF signal from a live GPS/GLONASS/Galileo/BeiDou/QZSS antenna(s) at a very high rate and store this to a hard drive digitally. This data can then be replayed directly into the RF front end of a GPS/GLONASS/Galileo/BeiDou/QZSS engine, faithfully reproducing the original signal.

Full Constellation Simulators

SatGenv2-Screen-montageFull constellation simulators, such as RACELOGIC’s SatGen software, generate all satellite signals from scratch. This is combined with a user defined trajectory file to create an artificial GPS signal. This can be done in real time using dedicated (but expensive) hardware, or processed offline on a normal PC which then creates a data file which can be replayed using a more simple record/replay system.

How to record, replay, and simulate GNSS Signals

LabSat is an RF Record/Replay system, which will capture real world, realistic data, and play it back as many times as required for testing. RACELOGIC also produce the SatGen simulation software, which has the ability to create a full constellation scenario, and then replay it using LabSat.

Who can benefit from a GNSS recorder, replayer, and simulator?

LabSat is designed for GPS chipset test and development, GNSS system integrators across industries as diverse as automotive, defence, marine, and government. Manufacturers of GNSS devices even use LabSat at events to demonstrate their products to end users, and in the testing of faulty units.

The ability for LabSat to integrate with RACELOGIC’s Video VBOX offers video synchronisation alongside the GNSS data, while the use of external modules allows external data to be recorded from a variety of sources, offering many testing possibilities.

LabSat is now used by leading OEM and mobile device companies such as Bosch, Garmin, Nokia, RIM, and Thales to test their devices in real world yet repeatable conditions. Have a look at some of LabSat’s users (Customer Profiles tab).

Find out more about LabSat by contacting us or reading more on our product page.

Visit www.labsat.co.uk for more information on our GPS simulator range.

VBOX Automotive

Posted in Applications

Automotive-Testing-with-VBOX-gps-test-equipment

"We believe that the continuous improvement in high accuracy GPS can solve many of the difficult measurement problems facing automotive test engineers today, without being either difficult to use or expensive."

Visit www.vboxautomotive.co.uk for more information on VBOX Automotive products.

It takes many years for a new car design to go from the drawing board to production. The test and validation phase is vitally important, and feeds back into the design process to improve performance, reliability, fuel economy, comfort and safety.

Vehicle testing involves putting every system on the vehicle through a demanding set of routines under many different environmental conditions. This is to simulate every kind of use likely to be experienced over the life of the car. During these tests, the vehicle is monitored by a staggering array of sensors which are logged and analysed afterwards by specialised teams of test and development engineers.

The quality of the sensors used in this process is paramount, as the costs of operating and testing a prototype vehicle, often in a foreign country, are very high. If new sensor technology comes along it takes a long time before the engineers trust the results.

Why do most test departments use VBOX GPS data loggers?

VBOX-ADAS-Test-Equipment-In-car-setupBefore 2002, automotive companies used fifth wheels, radar sensors, microwave sensors and optical systems to provide speed and distance measurements during proving ground testing. Whilst these sensors gave good levels of accuracy in perfect conditions, they suffered on snow, loose, uneven and wet surfaces. They often took a long time to fit, and were vulnerable to damage.

However, when the US Government switched off the deliberate scrambling of the GPS signal, RACELOGIC saw an opportunity to use satellite signals to measure speed and distance, without any of the downsides associated with the previous technologies.

When we first introduced GPS to the vehicle test departments of the major OEMS in 2002, the engineers responsible for speed and distance measurements spent a long time satisfying themselves that the results matched their existing fifth wheels, optical sensors and microwave sensors, which were traditionally used for this job.


Continental Automotive Systems

ContinentalContinental Automotive Systems are behind numerous innovations in driving safety, producing products for many global vehicle manufacturers. For the test and development of their ADAS products they needed a flexible system to help them quickly measure complex data with maximum accuracy.

Rob Cavanagh, Lead ADAS Engineer at Continental

"The VBOX ADAS system has proved very useful. We even use the system in client demos, which gives a great illustration of the accuracy of our systems against the VBOX benchmark... I especially like the system's ability to be installed into two vehicles, zero the distances out, and be up and testing in just 15 minutes."


VBOX-brake-testingAfter many tests by different interested companies, it turned out that the VBOX was in fact more accurate than any previous method, and quickly became a favoured instrument due to its size, ease of use and versatility. Since then, the RACELOGIC VBOX is in daily use in almost every single OEM Vehicle Test Department around the world both at proving grounds and on the road.

Brake testing is a very popular application for VBOX. For example, VBOX 3i accurately samples the speed and g-forces 100 times a second along with a brake trigger input which is scanned 100,000 times a second. Using in-house developed algorithms and advanced calibration techniques, the braking distance of a vehicle can now be measured to within ±1.8cm.

After many years of research and development that continues to this day, we believe we have the most accurate and reliable vehicle testing systems on the market.

Brake-test-screen-shot


MIRA Proving Ground

MiraMIRA (Motor Industry Research Association) are based in Warwickshire, UK, and are a leading independent provider of engineering development and research services to the worldwide automotive industry.

MIRA use a number of VBOX units to carry out brake testing on their own test track facility for many large automotive manufacturers. They have various types of dry and wet surfaces with varying levels of grip, and find that VBOX is the only technology which works consistently in all conditions.

Previously, MIRA had used fifth wheels, radar sensors, microwave sensors and optical sensors, but have now replaced all of these with VBOX systems.
http://www.mira.co.uk/

Visit www.vboxautomotive.co.uk for more information on VBOX Automotive products.

VBOX Motorsport

Posted in Applications

“We believe that some of the biggest performance gains can come from driver improvement, and our goal is to make this process as fun and intuitive as possible; removing all of the complexity whilst remaining affordable for all levels of motorsport.”

Black-Oled-Display-VBOX-Motorsport

RACELOGIC's have designed a whole range of motorsport products including data loggers, video loggers, lap timers and performace meters. Visit our separate website www.vboxmotorsport.co.uk for detailed product information.

All VBOX Motorsport systems come as standard with simple yet powerful software and support which will help you get the best out of yourself and your car. Whether you're a racing driver or team, racing coach, championship, or track day enthusiast, RACELOGIC have the system for you.

Why GPS data loggers?

GPS data loggers are ideally suited to motorsport due to their lightweight, small size and accuracy. Without fitting any other sensors, you can measure Speed, Track Position, Distance, Lap Time, Split Times, Predictive Lap Times, Lateral Acceleration, Longitudinal Acceleration and Height.

Who uses VBOX Motorsport products?

Professional Racing Drivers

Motorsports professionals (e.g. Anthony Davidson, Walter Rohrl, Sabine Schmitz) use the Video VBOX Pro to fine tune driving lines and lap times, compare vehicle set-ups, and synchronise data with video for race and testing analysis. For 2cm positional accuracy and high dynamic testing, teams and developers also use the VBOX range of professional data loggers.

Racing series

Race series like the Australian GT Series and championships use Video VBOX Pro and Lite to provide video evidence in case of disputes; promote closer, more exciting racing; and create publicity. Find out more.

Race-series-australian-GT

Race training schools and experiences

Numerous driving schools and experience companies (e.g. BMW, Silverstone, V8 Race) use Video VBOX with OLED displays to record onboard video and provide a training aid. Training centres use Video VBOX as an educational and promotional tool, whilst drive experience centres find that selling video to customers with a record of their laps and a camera showing their face is a valuable record of a driving experience, and a profitable revenue channel.

Coaches and Instructors

RACELOGIC's highly rated driver training software, Circuit Tools, together with Video VBOX has become a vital tool for racing instructors and coaches (e. g. Nigel Greensall, Anthony Dunn, Ben Elliot, Ben Clucas). Video VBOX helps to immediately identify areas for improvement, provide objective data to support instructor's comments, and offer the opportunity to hire, sell, and install systems in customer cars. Find out more.

Race-Instructor-Ben-Clucas

Racers and track day drivers

Video VBOX Lite offers a new dimension to video, and is becoming very popular on track days, with its ability to record video from several bullet cameras, and overlay GPS and vehicle data on the video with stunning graphics. Find out how to choose a video logging system.

Hamish Brandon racing in the MINI Challenge Zandvoort

If you don't require video, RACELOGIC offer compact performance meters, which have an integrated display. Using the same high accuracy GPS found in Video VBOX, PerformanceBox, DriftBox and VBOX Sport will record speed, track position, distance, lap times, split times, predictive lap times, lateral acceleration, longitudinal acceleration and height. They will even measure a vehicle's power, and in the case of DriftBox, drift angle.

VBOX-Motorsport-Group