The Critical Importance of Recalibrating ADAS Systems When Replacing a Windshield


Advanced Driver Assistance Systems ADAS (Advanced Driver Assistance Systems, for the acronym in English) are one of the greatest advancements in the car in terms of safety. These systems are becoming more common and the European Union is making their introduction step-by-step mandatory. In cars homologated from July 6 this year
will be required automatic emergency braking, lane change assistant, intelligent speed assistant, drowsiness, rear view camera, and distraction and drowsiness alerts.

ADAS systems need “eyes” that see what is happening around the car and collect this information to reliably recognize the environment and act accordingly. Those “eyes” are cameras and sensors, most of which are installed on the windshield. If it replaces a windshield,
you need to remove the cameras of the broken glass and mount them on the new one. Once installed, these systems must be recalibrated to ensure they operate with maximum accuracy and provide the correct information.

These systems must continue to function accurately throughout the life of the vehicle because they can eventually take control of the car, and because the driver trusts them and waits for their response to warn them of
a risky situation or intervene.

One of the proposals made by the International Automobile Federation (FIA) to the European Parliament with the aim of maximizing the benefits of ADAS systems before their mandatory implementation is to “ensure transparent calibration processes so that ADAS systems maintain their effectiveness over time.” of time”. And it’s that most common reason why
ADAS systems malfunctions is because their cameras and sensors have not been recalibrated when certain repairs require it, or because the operation was not performed correctly.

It is therefore important that the sensors of these systems are recalibrated after an accident or a broken windscreen, so that they continue to provide the correct information and the safety systems can perform a reliable recognition of the vehicle’s environment, for example to detect other cars, pedestrians, signs, roads… Even the FIA ​​has stated that “ensuring transparent maintenance and calibration processes so that ADAS systems
maintain their effectiveness over time» is one of the keys to the future success of this technology.

ADAS systems can suffer serious failures because their cameras and sensors have not been recalibrated, or that operation has not been performed properly, after a windshield has been replaced.

The Belron Group has conducted tests in the United Kingdom with the MIRA Institute to assess the effects of poor calibration and degradation of the
performance of the braking system AEB automatic emergency alert when the calibration of the windshield-mounted camera deviated from the manufacturer’s specifications.

For this test, Belron Technical designed a test protocol similar to the Euro NCAP static and dynamic tests for the AEB system. In it, the tested car was launched at 50 km/h against a static obstacle, with an overlap of 100%, -50% and +50%; and later against
a dynamic obstacle driving at 20 km/h in the same direction as the tested vehicle, with the same overlaps.

The MIRA Institute’s tests show that when the cameras fail due to poor recalibration, the car is unable to perform
reliable recognition of the environment and the safety systems fail, which could cause a collision or collision because the system does not correctly calculate the distances or the required braking power.

Replacing a windscreen is an increasingly complex operation. When a new one is installed, the cameras and sensors of the ADAS systems must be recalibrated so that they provide accurate information to the security systems. This recalibration should be performed by professionals with the training, experience, methodology,
adequate facilities and technology; because incorrect recalibration can cause serious failure of a vehicle’s safety systems.

Carglass is the leading expert in ADAS system recalibration in Spain. We are the only automotive glass specialist with the technology to recalibrate these driver assistance systems in 100% of the national territory. In addition, the company’s constant commitment to technological innovation has made Carglass the only specialist capable of recalibrating practically 100% of the models on the market, even if they were recently launched.

The Carglass technical team has the appropriate training to perform an accurate recalibration of the ADAS technology. Carglass has the facilities, tools, technology and methodology (Belron Technical has integrated this process into the Belron Way of Fitting technical manual which is followed by all Group glass specialists worldwide)
recalibrate correctly. In addition, it continuously invests in its technological update and services, integrating the latest technologies.

The Belron Group carried out almost 2 million recalibrations in 2021. In Spain, 16% of cars whose windscreen was replaced by Carglass Spain had to recalibrate the cameras of their ADAS systems, a percentage far from the 31% in Norway for being the oldest in the Spanish fleet. That yes, as it assures
Neil Rogers, General Manager of Carglass Spain“the difference is only in the speed curve of the implementation of these systems, because we know that in the future 100% of cars will be equipped with them and their sensors will have to be recalibrated when a windscreen is replaced”.

Source: La Verdad


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