To ensure that in the event of a fr

To ensure that in the event of a frontal AZT crash there is no unwanted crash detection, it is necessary that the structure in which the sensor is attached (typically, and hereinafter for the following paragraphs, the frontend) does not suffer displacement relative to the non-deformed region of the vehicle body during the time when the decrease in speed is most significant. To meet the above requirement, it must be ensured that for any Y-section, the frontend has at least 130 mm of air with respect to the AZT barrier in its initial position. Air is understood as any region of space that will occupy a null space in X with the advancement of the AZT barrier before causing displacement of the frontend. It is not necessary that the lower region of the frontend meet this requirement if it is achieved that its displacement does not cause a displacement in the upper region of the frontend. In particular, a minimum of 130mm of air is required between the bumper and the frontend (typically 80mm between the bumper and the bumper cross member, and 50mm between the bumper cross member and the frontend). If collapsible elements are used to comply with the above requirements, it is necessary to guarantee that their real behavior corresponds to the behavior observed in the finite element simulations through the checks deemed appropriate. Compliance with the above requirements by breaks occurring in areas not specifically designed to break is considered invalid The minimum X position for the UFS is determined based on the maximum intrusion of the AZT barrier. The maximum X position for the UFS is determined based on the ODB 40 km /h crash dynamics. The parts of the vehicle involved in transmitting signals to the sensor determine the sensor's ability to discriminate load cases. The geometric and mechanical properties of these parts can have positive or negative effects on this discrimination capacity. For this reason, to ensure the correct operation of the sensor, both the sensor environment and the parts involved in signal transmission must be taken into account. In the event that the sensors are positioned in a Y coordinate where not all the barriers for which crash must be detected are found, it must be ensured that the structure in which the sensor is fixed is such that all barriers coincide with she in some Y coordinate. To ensure a sufficient quality of the signal in the sensor, it is necessary that the sensor remains correctly attached to the structure in which it is fixed, and this to the vehicle body, at least until the moment in which a crash is detected. In particular, the breakage of the part to which the sensor is fixed, the separation of the sensor fixing area from the part and the sensor from its fixing area should be avoided. It must be ensured that the sensor does not suffer collisions during the relevant measurement time. For this, a deformation space of 50 mm free from collision with other elements must be ensured. The elements that move together with the sensor during its