Rate of ascent monitor using piezoelectric transducer

Details Rate of ascent monitor using piezoelectric transducer Rate of ascent monitor using piezoelectric transducer

1987-11-23

1989-04-11

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310330, 310337, 310324, 310319, 738651, 367134, H01L 4108

Patent

active

048209538

ABSTRACT:
A rate of ascent monitor for drivers uses a sound transducer with velocity characteristics, preferably a diaphragm type piezoelectric transducer, to sense rate of pressure change, and a threshold detector connected to the transducer to drive an indicator providing a warning of an excessive rate of ascent. A second threshold detector can be used to discriminate between descending and ascending motion. The device can be a compact wrist mounted unit.

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patent: 4193010 (1980-03-01), Kompanek
patent: 4563758 (1986-01-01), Paternostro
patent: 4583484 (1986-04-01), Freund
patent: 4589283 (1986-05-01), Morrison, Jr.
patent: 4604737 (1986-08-01), Hoffman
patent: 4658358 (1987-04-01), Leach et al.

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