| 摘要 |
<p>PURPOSE:To detect passage right above a sensor part without reference to whether a shock sound is large or not by finding the angle between lines connecting a point right above a shock sensor part, and the shock sensor part and a moving body from directional components of X, Y, and Z by an arithmetic circuit. CONSTITUTION:As a ship 15 approaches, the composite component of X-axial and Y-axial components VSX and VSY detected by X-axial and Y-axial shock sensors 1 and 2 decreases and a Z-axial component VSZ detected by a Z-axial shock sensor 3 increases, so that the angle phi becomes small. The respective outputs of the shock sensor 4 are amplified and converted by A/D converters 7 and 9 into digital data with each control signal from a control circuit 11 and the digital data are inputted to the arithmetic circuit part 5. The arithmetic circuit 10 performs arithmetic based upon an equation according to the control signal outputted by the control circuit 11. The calculated angle phi is sent out to the comparator 12 of an output circuit part 6. The set angle phiS of an angle setting means 14 and the calculated angle phiare compared digitally. A set angle phiS is set within a harm range wherein the ship 15 is damaged in consideration the depth Z where the shock sensor part 4 is installed and the amount of explosion powder. When the calculated angle phi becomes smaller than the set angle phiS, the comparator 12 sends out an output and an output circuit 13 generates an output signal.</p> |
