G PHYSICS
G01 MEASURING; TESTING
G01P MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
15/00 Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
G01P15/02 by making use of inertia forces; using solid seismic masses
G01P15/08 with conversion into electric or magnetic values