Device and method for measuring accelerations for a passenger protection system in a vehicle
0 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is a device for measuring accelerations for a vehicle passenger protection system, whereby a first and second acceleration sensor with a first or second sensitivity direction are fitted in relation to a prespecified main direction of measurement, which form a first or second transverse projection in their projection onto a first or second transverse direction which is aligned vertically to the main direction of measurement, together with suitable evaluation devices for evaluating the processed first and second measuring signals. The first and second transverse projection of the first and second sensitivity directions run parallel to each other, and the first and second main projection of the first and second sensitivity direction run antiparallel to each other. Furthermore, the evaluation of the measured values provided by the sensors is conducted in such a manner that at least a partial error compensation results when the reference value changes in relation to the first and the second signal. Preferably, the evaluation is conducted in such a way dependant on the alignment of the first and second sensitivity direction that the error compensation is at a maximum level when the first and second reference value is changed.
8 Citations
38 Claims
-
1-19. -19. (canceled)
-
20. A device (10) for measuring accelerations for a vehicle passenger protection system, the device being adapted to a prespecified main direction of measurement (20) and comprising:
-
at least one first acceleration sensor (12) with a first sensitivity direction (14), which forms a first main projection (22) onto the main direction of measurement (20), and a first transverse projection (32) onto a transverse direction (30) which is aligned vertically to the main direction of measurement (20), and a first evaluation channel for processing a first measuring signal from the first acceleration sensor in relation to a first reference value (R1);
a second acceleration sensor (16) with a second sensitivity direction (18), which forms a second main projection (24) onto the main direction of measurement (20), and a second transverse projection (34) onto the transverse direction (30), and a second evaluation channel for processing a second measuring signal from the second acceleration sensor in relation to a second reference value (R2); and
evaluation devices for evaluating at least the first processed measuring signal (F1) and the second processed measuring signal (F2), and, at least partially, a trigger signal for the passenger protection system, which is generated based on the first measuring signal and the second measuring signal;
wherein the first and second transverse projections (32, 24) in the first and second sensitivity directions (14, 18) are aligned parallel to each other, and the first and second main projection (22, 24) in the first and second sensitivity directions (14, 18) are aligned antiparallel to each other; and
the evaluation is conducted in such a manner that at least a partial error compensation results when the first or second reference value (R1 or R2) in the first or second evaluation channel changes. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
-
-
32. A procedure for measuring accelerations for a vehicle passenger protection system comprising:
-
i) determining a main direction of measurement (20) in relation to a forwards direction (26) of a vehicle;
ii) providing a first acceleration sensor (12) with a first sensitivity direction (14), which forms a first main projection (22) onto the main direction of measurement (20), and a first transverse projection (32) onto a transverse direction (30) which is aligned vertically to the main direction of measurement (20);
iii) providing a second acceleration sensor (26) with a second sensitivity direction (18), which forms a second main projection (24) onto the main direction of measurement (20), and a second transverse projection (24) onto a transverse direction (30), wherein the first and second transverse projection (32, 24) of the first and second sensitivity direction (14, 18) are parallel to each other, and the first and second main projection (22, 24) of the first and second sensitivity direction (14, 18) are antiparallel to each other;
iv) processing a first measuring signal from the first acceleration sensor (12) to form a first processed signal (F1) in relation to a first reference value (R1) in a first evaluation channel for processing the first signal from the first acceleration sensor (12);
v) processing a second measuring signal from the second acceleration sensor (16) to form a second processed signal (F2) in relation to a second reference value (R2) in a second evaluation channel for processing a second signal from the second acceleration sensor (16); and
vi) evaluating the first and second processed signal (F1 and F2) in relation to a corresponding first and second initial threshold (T1 and T2), so that at least a partial error compensation results when the first and second reference values (R1 and R2) in the first and second evaluation channel change. - View Dependent Claims (33, 34, 35, 36, 37, 38)
-
Specification