Testing and calibrating instrument
AssigneeVolkswagenwerk Aktiengesellschaft
InventorUlrich Wittkowski
Life of this patent
Estimating the term…
Abstract
A testing and calibrating instrument for acceleration sensors in which a pendular hammer and a pendular anvil are pivotally mounted on a support. An acceleration sensor which is to be tested and calibrated, as well as a standard acceleration sensor of known characteristics, are attached to the anvil at the level of the impact point at which the hammer strikes the anvil, the hammer and anvil being so dimensioned and positioned with respect to each other that the impact point lies at least approximately at the level of a nodal point of bending oscillations which arise in the anvil when the same is struck by the hammer.
Claims9
A testing and calibrating instrument comprising, in combination:
- a. support means;
- b. a pendular hammer mounted on and suspended from said support means for pivotal movement in a given plane;
- c. an elongated pendular anvil mounted on said support means for pivotal movement in at least approximately the same plane, the length of said anvil extending generally downwardly from the point where it is suspended from said support means, said anvil being rigid throughout its length and said hammer and anvil being dimensioned and positioned with respect to each other such that said hammer strikes said anvil at a given impact point which lies at least approximately at the level of a nodal point of bending oscillations which arise in said anvil when the same is struck by said hammer;
- and
- d. means for attaching a test acceleration sensor as well as a standard acceleration sensor to said anvil at the level of said impact point.
Dependencies are inferred from the claim text.