Diving information processing device, control method for a diving information processing device, and a control program

Abstract

If the diving mode is erroneously entered while travelling at a high altitude, such as when flying in an airplane, the error is detected so that calculating tissue in/out-gassing of inert gases continues. The control unit 50 of the dive computer records the water depth corresponding to the pressure measured by the depth measuring unit 61 together with the elapsed time, determines if the user is moving in a low pressure region based on water entry detection by a water entry detection unit and the depth detected by the depth measuring unit 61, and if the user is determined to be travelling in a low pressure region cancels measuring the water depth, cancels the wrongly selected operating mode, and changes from the operating mode used when diving to an operating used when not diving.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows the face of a diving information processing device according to the present invention.

FIG. 2 is a block diagram of a dive computer according to a preferred embodiment of the invention.

FIG. 3 is a function block diagram of the safety information derivation unit;

FIG. 4 is a graph describing the tissue half-time of the dive computer.

FIG. 5 is a function block diagram describing the arrangement for determining the start and end of a dive, rapid ascent alarm, and measuring the surface resting time.

FIG. 6 describes the process for determining the beginning and end of a dive.

FIG. 7 describes the timing for measuring ascent speed and why the rapid ascent alarm is not emitted at shallow depths.

FIG. 8 is a flow chart of the different operating modes.

FIG. 9 describes a prior art process for determining the beginning and end of a dive.

FIG. 10 is a block diagram of the arrangement for determining whether to cancel the diving mode.

FIG. 11 describes the timing and content of the operation when the diving mode is enabled erroneously and the process for cancelling the diving mode.

Claims

1. A diving information processing device comprising: a pressure measuring unit for measuring ambient pressure;a timekeeping unit for measuring elapsed time;a water entry detection unit for detecting an in-water condition;a diving evaluation unit for determining that a diver is diving when an in-water condition is detected and the water depth corresponding to the pressure measured by the pressure measuring unit is deeper than a predetermined diving evaluation depth;a depth measuring unit for measuring the water depth corresponding to the pressure measured by the pressure measuring unit during a dive;a depth recording unit for recording the water depth and the elapsed time;a low pressure region evaluation unit for determining movement in a low pressure region where the pressure is lower than a predetermined atmospheric reference pressure based on water entry detection by the water entry detection unit and the pressure measured by the pressure measuring unit; anda depth measuring cancellation unit for cancelling depth measurement by the depth measuring unit when travel in a low pressure region is detected.

2. The diving information processing device described in claim 1, wherein: the low pressure region evaluation unit detects movement in a low pressure region if the water entry detection unit detects a not-in-water condition continuously for a predetermined time after the diving evaluation unit has determined that the diver is diving.

3. The diving information processing device described in claim 1 wherein: the water entry detection unit comprises detection electrodes for detecting conductivity through external water, and detects water entry when there is conductivity between the detection electrodes.

4. The diving information processing device described in claim 1 further comprising: a pressure measurement resetting unit for resetting the pressure measuring unit at a predetermined pressure measurement timing of the pressure measuring unit when not diving.

5. The diving information processing device described in claim 1 further comprising: a pressure measurement resetting unit for resetting the pressure measuring unit when a predetermined reset standby time passes after depth measurement is cancelled by the depth measuring cancellation unit.

6. The diving information processing device described in claim 4 or 5, wherein: the pressure measurement resetting unit measures the atmospheric reference pressure when resetting the pressure measuring unit.

7. The diving information processing device described in claim 5, further comprising: a standby time setting unit enabling the user to desirably set the reset standby time.

8. The diving information processing device described in claim 1 further comprising: a safety information derivation unit for calculating tissue absorption and tissue elimination of inert gas based on the pressure and the elapsed time.

9. The diving information processing device described in claim 1 further comprising: an operating unit enabling user operations; anda manual recording cancellation unit for cancelling recording by the depth recording unit when a specific operation is executed on the operating unit.

10. A control method for a diving information processing device comprising a pressure measuring unit for measuring ambient pressure, a timekeeping unit for measuring elapsed time, a water entry detection unit for detecting an in-water condition, a diving evaluation unit for determining that a diver is diving when an in-water condition is detected and the water depth corresponding to the pressure measured by the pressure measuring unit is deeper than a predetermined diving evaluation depth, and a safety information derivation unit for calculating tissue absorption/elimination of inert gas based on the pressure and the elapsed time while diving, the control method comprising: a diving evaluation step for determining that a diver is diving when an in-water condition is detected and the water depth corresponding to the pressure measured by the pressure measuring unit is deeper than a predetermined diving evaluation depth;a depth recording step for recording the water depth corresponding to the pressure measured by the pressure measuring unit together with the elapsed time during a dive;a high altitude movement evaluation step for detecting travel at a high altitude based on water entry detection by the water entry detection unit and the pressure measured by the pressure measuring unit; anda recording cancellation step for cancelling recording by the depth recording step when high altitude travel is detected.

11. A control program for controlling by means of a computer a diving information processing device comprising a pressure measuring unit for measuring ambient pressure, a timekeeping unit for measuring elapsed time, a water entry detection unit for detecting an in-water condition, a diving evaluation unit for determining that a diver is diving when an in-water condition is detected and the water depth corresponding to the pressure measured by the pressure measuring unit is deeper than a predetermined diving evaluation depth, and a safety information derivation unit for calculating tissue absorption/elimination of inert gas based on the pressure and the elapsed time while diving, the control program causing the diving information processing device to: determine that a diver is diving when an in-water condition is detected and the water depth corresponding to the pressure measured by the pressure measuring unit is deeper than a predetermined diving evaluation depth;record the water depth corresponding to the pressure measured by the pressure measuring unit together with the elapsed time during a dive;detect travel at a high altitude based on water entry detection by the water entry detection unit and the pressure measured by the pressure measuring unit; andcancel recording in the depth recording step when high altitude travel is detected.