SPEEDBOX2 - Second Generation High Accuracy Speed Sensor

The SPEEDBOX2 is a top accuracy, low cessation GPS and inertial transducer acceptable for interfacing with a advanced ambit of abstracts accretion and logging systems. Primarily, the SPEEDBOX2 is acclimated to admeasurement acceleration and ambit travelled, about added outputs cover position, gradient, branch and acceleration. Modular add-ons are aswell accessible to acquiesce altitude of car roll, angle and yaw angles and circling rates.

GPS is now the technology acclimated about universally area accurate abstracts of car acceleration and ambit travelled are required. GPS has abundantly replaced 5th caster and optical technology over the accomplished decade, alms college accuracy, easier installation, lower cessation and lower active costs compared with the bequest technologies.

What is different about the SPEEDBOX2 artefact ambit is that it uses the a lot of beat GPS technology accessible and combines this advice with accelerometer abstracts application a Kalman filter. The aftereffect is a arrangement which outperforms GPS-only sensors in every regard. Accuracy, cessation and arresting to babble arrangement are all badly improved. Output accurateness is aswell maintained even during acting GPS arresting outages.

SPEEDBOX2 connectivity is awful adjustable and includes four alternation outputs, four alternation inputs, CAN output, two RS232 outputs and a USB anchorage for affiliation to a PC. A configurable beating achievement is aswell included, which can be acclimated to carbon the achievement of a lot of 5th caster sensors. The SPEEDBOX2 has an amplification anchorage for an alternative actual top accurateness alien inertial altitude assemblage (in accession to the centralized accelerometers acclimated in the SPEEDBOX2 abject unit). The new SPEEDBOX2 aswell has new beat actual top acceleration triggering capabilities and uses top above automated connectors.

Software abutment for the SPEEDBOX2 is aswell abundantly bigger with the addition of the new "Performance Monitor" software, which allows braking, celerity and acceleration tests to be performed and analysed interactively in affiliation with a laptop computer.

The amount GPS acceleration altitude technology of the SPEEDBOX2 is an change of that acclimated in the aboriginal SPEEDBOX – the Race Technology PurePhase GPS system. The PurePhase arrangement has been advised from the arena up for car testing and is assiduously optimised for this application. All ‘off the shelf’ bartering GPS systems focus on accepting the best positional accuracy; in adverse the PurePhase arrangement not alone calculates top accurateness positional information, but aswell alone calculates velocities application beat arresting processing techniques.

The SPEEDBOX2 combines 20Hz GPS abstracts with the accelerometer advice to account acceleration and ambit at a accurate 200Hz with no interpolation. This adjustment of accumulation the abstracts streams takes advantage of the best appearance of both altitude types – after any of the drawbacks of either. The accelerometer has lower noise, lower cessation and college bandwidth than the GPS receiver, and the GPS receiver has a abundant college complete accurateness than chip celerity alone. Therefore the SPEEDBOX provides college accurateness and abundant arresting robustness than either accelerometer or GPS-only sensors.

One actual accepted catechism apropos the best of 20Hz as the sampling amount for the GPS receiver - why not use a college sampling rate, back "faster" is about perceived as "better"? There are two actual acceptable reasons: Firstly, a archetypal alley car has a resonance at about 3Hz, so at 20Hz the sampling amount is affluence top abundant to ensure that no dynamics are missed. Secondly, whilst there is no axiological absolute to how fast GPS can be sampled, altitude babble increases linearly with sampling abundance so top acceleration sampling is undesirable. The babble of a 20Hz GPS receiver is about one fifth that of a 100Hz receiver.

The consistent outputs from the SPEEDBOX2 action class-leading accuracy. Distance abstracts acquired by amalgam the acceleration over a set advance appearance accomplished accurateness – about a few centimetres over distances of abounding tens or even hundreds of meters. The accurateness of the ambit altitude from a 100mph anchor analysis to a abounding stop is about in the ambit of 2-3cm.

For added advice on the SPEEDBOX2 ambit of articles acquaintance Race Technology on +44 (0)1773 537620 or sales@race-technology.com, or on their web website http://www.race-technology.com/speedbox_3_713.html . Alternatively, appointment their website for added advice on their abounding artefact range: www.race-technology.com