Shock isolation system for an inertial sensor arrangement
The shock isolation system for an inertial sensor arrangement, on the one hand, causes an advantageous moment of inertia by the special arrangement of the individual sensors, especially of the gyroscope used. On the other hand, an advantageous long interval of the required shock-absorbing components (“shock mounts”) is provided by the use of several tubular shells. A measurement device with this inertial sensor arrangement thus achieves improved accuracy and reliability.
1. Shock-isolating holding device for an inertial sensor arrangement, comprising:
a hollow cylindrical outer shell,
shock reducing shock mounts which are arranged in a coaxial array in the outer shell, and
a sensor platform of essentially hollow cylindrical shape which is attached coaxially within the outer shell by means of the shock mounts; and
three inertial sensors;
wherein at least two of the three inertial sensors have axes which are arranged on the sensor platform at an angle that is offset from a longitudinal axis of the hollow cylindrical outer shell, the angle at which the axes of each of the inertial sensors is arranged being different from that at which the axes of the other two inertial sensors are arranged and
wherein each of the shock reducing shock mounts is obliquely angled relative to the longitudinal axis of the hollow cylindrical outer shell.
2. Shock-isolating holding device for an inertial sensor arrangement as claimed in claim 1 , wherein the shock reducing shock mounts have centers which define corner points of an elongated prism with an area that has a diameter which is a maximum of 50% of the length of the prism.
3. Shock-isolating arrangement of inertial sensors, according to claim 1 , further comprising:
a housing in which the inertial sensors are mounted in a straight line one after the another and are rigidly connected to one another.
4. Shock-isolating arrangement of inertial sensors as claimed in claim 3 , wherein the inertial sensors are ring laser gyroscopes.
5. Shock-isolating arrangement of inertial sensors as claimed in claim 3 , wherein the inertial sensors are connected in a progressive manner with connecting or carrier elements.
6. Shock-isolating arrangement of inertial sensors as claimed in claim 3 , wherein the inertial sensors comprise a centrally arranged inertial sensor for determining roll angle changes, and inertial sensors located laterally thereof for determining yaw angle changes or pitch angle changes.
7. Shock-isolating arrangement of inertial sensors as claimed in claim 3 , wherein the inertial sensors are arranged such that effective moments of inertia of the masses of the inertial sensors, as compared to compliance of the shock reducing shock mounts by which the inertial sensors are attached assume values that are as large as possible.
8. Shock-isolating arrangement of inertial sensors as claimed in claim 3 , wherein the inertial sensors are held in recesses of mounting elements, said mounting elements comprise a first mounting element for holding a gyroscope which detects mainly rolling revolutions around a lengthwise axis of the housing, a second mounting element that is flanged onto the first mounting element and a third mounting element which is, in turn, attached to second mounting element.
9. Shock-isolating arrangement of inertial sensors as claimed in claim 3 , wherein the housing comprises a cylindrical outer shell and the initial sensors are located in the sensor platform of essentially hollow cylindrical shape which is attached coaxially within the cylindrical outer shell by means of the shock reducing shock mounts.