Abstract
A shock sensor is provided in which the shocking of a vessel or casing causes a relative movement between a body of fluid contained therein and detection means, resulting in detection in a very short period and with good response of the shock by the detection means in the form of an electrical signal. Either structural or electrical threshold presetting means can be provided to allow detection of only those shocks in excess of a given value. To permit detection of shocks applied from a plurality of directions, the passageway for the fluid can be branched into such directions, with detection means located in a common fluid passage. Damping means can also be provided to suppress noises arising from external vibrations or for imparting a sharply falling trailing edge to the detection signal. Detection means can be constructed to produce a voltage according to Fleming's rule of right hand by arranging for a conductive liquid to move upon shocking in a direction perpendicular to a magnetic field, or to produce an electrical signal by utilizing a change in the electrostatic capacitance or an electromagnetic induction.
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