초록 ▼

A shock detector for measuring intermittent shock events comprises a mechanical delay line to supply delayed output motion in response to input motion along an input axis. A transducer converts the delayed output motion to an electrical signal representative of the delayed output motion. The transdu

A shock detector for measuring intermittent shock events comprises a mechanical delay line to supply delayed output motion in response to input motion along an input axis. A transducer converts the delayed output motion to an electrical signal representative of the delayed output motion. The transducer is generally in a respective inactive state to reduce the power consumption of the shock detector. A relatively low power motion sensor, such as low power accelerometer or tilt actuated switch, is employed for switching the transducer to a respective active state in response to the input motion thereby allowing the shock detector to measure any intermittent shock event regardless of the generally inactive state of the transducer.

대표청구항 ▼

A power-conserving shock detector for measuring shock events, comprising; a mechanical delay line to supply delayed output motion in response to input motion along a predetermined input motion axis; a transducer mechanically coupled to said mechanical delay line for converting the delayed output mot

A power-conserving shock detector for measuring shock events, comprising; a mechanical delay line to supply delayed output motion in response to input motion along a predetermined input motion axis; a transducer mechanically coupled to said mechanical delay line for converting the delayed output motion to an electrical output signal representative of said delayed motion, said transducer being generally in a respective inactive state to reduce the power consumption of said shock detector; an accelerometer to produce a substantially accurate acceleration output signal after a predetermined stabilization time passes upon said accelerometer being turned on, said accelerometer being periodically activated to have a predetermined duty cycle sufficient to further reduce power consumption therein; and a timer for producing an output signal at periodic intervals, said timer being coupled to said accelerometer for activating said accelerometer in accordance with said duty cycle and for switching said transducer to a respective active state thereby allowing said transducer to measure at least an initial portion of the shock event and allowing said accelerometer to accurately measure any remaining portion of the shock event.