| 摘要 |
PURPOSE:To cope with various display forms, by placing a member for generating the voltage corresponding to a pressed point, by pressing, in accordance with the recording surface, and also energizing a circuit for converting the generated voltage to depth. CONSTITUTION:In accordance with recording paper 1 on which a sea surface line 2, a shoal of fish 3 and a sea bottom 4 are recorded, a member 5 for generating the voltage corresponding to a pressed point is provided. As for this member 5, voltage E (V) is applied between both ends in the long width direction of a conductive rubber sheet 6, and an electrode 7 having a lead 8 forms a microscopic space and is provided so as to be opposed to said sheet 6. Therefore, when a point P is pressed down in order to derive the depth of the shoal of fish 3, voltage generated by this pressure is A/D-converted 13, and an obtained output value is dealt with as information of a position where the shoal of fish 3 in the effective recording paper width is displayed. Said output value is converted 14 to distance information in accordance with a range signal received by being interlocked with a range switch 10. Also, this distance information is added and counted 15 in accordance with a shift signal received by being interlocked with a shift switch 11, and the depth is derived and displayed 9. |
