| 摘要 |
PURPOSE:To rapidly and accurately discriminate tide time, by accurately displaying the tide time corresponding to a calender or a region in a digital system while issuing an alarm in cooperation with clock function when the tide time is coincided with the present time. CONSTITUTION:An electronic tide meter is constituted of a calender display part 1, a time display part 2, a high tide display part 3, an ebb tide display part 4, a region display part 5, a tidal ratio display part 6 and an alarm 7 while an electronic circuit, which consists of an oscillation circuit 8, a time measuring circuit 9, an alarm memory apparatus 10, a calender memory apparatus 11, a coincidence judge circuit 12, a tidal data memory apparatus 15 and an operation circuit 17, is provided. Date and place informations from the calender memory apparatus 11 and the tidal data from the tidal data memory apparatus 15 are inputted to the operation circuit 17 to operate a tidal ratio. Because the alarm 7 is operated when the tidal ratio preset to an initial data memory apparatus 18 is coincided with that of present time, tide time can be known rapidly and accurately. |
