JP2005263115A - Information processing device for divers, method for controlling information processing device for divers, control program and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To more exactly reproduce diving information including internal body nitrogen amount after finishing diving from log data recorded in a dive computer at the time of the diving. <P>SOLUTION: A diving starting time internal body nitrogen partial pressure storing part of the dive computer for reproducing a changed state of internal body nitrogen amount at the time of the diving after the diving stores starting time internal body nitrogen partial pressure to be internal body nitrogen partial pressure when starting the diving. A water depth data storing part 89 stores water depths at the time of the diving as profile data in time series. A respiration nitrogen recomputing part 90 recomputes respiration nitrogen partial pressure at the time of the diving based on the profile data. An internal body nitrogen partial pressure computing part 88 reproduces the internal body nitrogen partial pressure at the time of the diving by recomputing the internal body nitrogen partial pressure based on the recomputed respiration nitrogen partial pressure and the starting time internal body nitrogen partial pressure. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an information processing apparatus for divers, a control method for the information processing apparatus for divers, a control program, and a recording medium, and more particularly to a technique for reproducing diving information that reproduces information during diving after diving.

Conventionally, in scuba diving, it is customary to write various diving information on a recording sheet called a log book at the end of diving.
In addition, an information processing apparatus for divers (hereinafter referred to as a dive computer) for recording information described in a log book on behalf of a diver who is a user and assisting the diver is known.
Some dive computers collect diving logs and store them in a memory (for example, see Patent Document 1).

In a conventional dive computer, diving date, diving start time, end time, FO2 (oxygen concentration), water depth data during the diving period, and the like are recorded as log data. However, since the memory area of the log data is limited, only log information similar to that described in the log book is recorded in the memory area.
In recent years, with the spread of personal computers, diving log data is transferred to personal computers, and the personal computer's own diving history is confirmed on the personal computer. It has come to be used for reflection. In addition, a dive computer called a profile mode that displays water depth data at regular intervals during diving has also become widespread.
Japanese Patent Laid-Open No. 3-264811

By the way, in the default state where the amount of nitrogen in the body (partial nitrogen partial pressure) has completely adapted to the water pressure before the start of diving, and the initial amount of nitrogen in the body (nitrogen partial pressure at the start of diving) is the default state, It was possible to reproduce diving information including the amount of nitrogen in the body on a dive computer or a personal computer from log data corresponding to the same log information described in the log book.
However, there is a problem that the diving information (particularly the amount of nitrogen in the body) may not be completely reproduced only by the log information described in the conventional log book.

In other words, when the initial body nitrogen amount (PGT) at the start of diving changes due to atmospheric pressure fluctuations before the start of diving, the initial nitrogen amount cannot be obtained, and complete diving information cannot be obtained. Because it ends up.
Therefore, the purpose of this patent is to control the diver's information processing device and divers' information processing device that can more accurately reproduce diving information including the amount of nitrogen in the body after the dive from the log data recorded in the dive computer during diving. To provide a method, a control program, and a recording medium.

In order to solve the above problems, an information processing device for divers that reproduces the state of change in the amount of nitrogen in the body after diving is a storage of the amount of nitrogen at the start that stores the amount of nitrogen in the body that is the amount of nitrogen in the body at the start of diving And a body nitrogen amount recalculation unit for recalculating the body nitrogen amount at the time of diving based on profile data in which the body nitrogen amount at the start time and the water depth at the time of diving are stored in time series. It is a feature.
According to the above configuration, the start-time nitrogen amount storage unit stores the start-time body nitrogen amount that is the amount of nitrogen in the body at the start of diving.
The in-body nitrogen amount recalculation unit recalculates the in-body nitrogen amount during diving based on profile data in which the in-body nitrogen amount at the start and the water depth during diving are stored in time series.

An information processing apparatus for divers that reproduces the state of change in the amount of nitrogen in the body after diving is based on the atmospheric pressure history storage unit that stores an atmospheric pressure history that is a history of changes in atmospheric pressure until the start of diving, and the atmospheric pressure history. A starting nitrogen amount calculation unit for calculating a starting nitrogen amount, which is the amount of nitrogen in the body at the start of diving, and profile data in which the starting nitrogen amount and the water depth during diving are stored in time series And a body nitrogen amount recalculation unit that recalculates the body nitrogen amount during the diving.
According to the above configuration, the atmospheric pressure history storage unit stores an atmospheric pressure history that is a history of changes in atmospheric pressure until the start of diving.
The starting nitrogen amount calculation unit calculates the starting nitrogen amount in the body, which is the amount of nitrogen in the body at the start of diving, based on the atmospheric pressure history.
As a result, the in-body nitrogen amount recalculation unit recalculates the in-body nitrogen amount during diving based on the profile data in which the in-body nitrogen amount at start time and the water depth during diving are stored in time series.

In these cases, a display unit may be provided that reproduces and displays the change in the amount of nitrogen in the body during the diving in a time series based on the amount of nitrogen in the body after the recalculation.
The amount of nitrogen in the body may be processed as a partial pressure of nitrogen in the body.
In addition, the control method of the information processing apparatus for divers that reproduces the state of change in the amount of nitrogen in the body during diving after diving includes a starting nitrogen amount storage process for storing the amount of nitrogen in the body at the start, which is the amount of nitrogen in the body at the start of diving. A body nitrogen amount recalculation process for recalculating the body nitrogen amount at the time of diving based on profile data in which the body nitrogen amount at the start time and the water depth at the time of diving are stored in a time series. Yes.

In addition, the control method of the information processing device for divers that reproduces the change state of the amount of nitrogen in the body after diving after diving includes an atmospheric pressure history storing process for storing an atmospheric pressure history that is a history of atmospheric pressure change until the start of diving, and the atmospheric pressure Based on the history, the starting nitrogen amount calculation process for calculating the starting body nitrogen amount which is the body nitrogen amount at the start of the diving, and the profile in which the starting body nitrogen amount and the water depth at the time of diving are stored in time series A body nitrogen amount recalculation process for recalculating the body nitrogen amount at the time of diving based on data.
In addition, the control program for controlling the information processing apparatus for divers that reproduces the change state of the amount of nitrogen in the body at the time of diving with a computer stores the amount of nitrogen in the body at the start, which is the amount of nitrogen in the body at the start of diving, It is characterized in that the amount of nitrogen in the body at the time of diving is recalculated based on profile data in which the amount of nitrogen in the body at the start and the depth of water at the time of diving are stored in time series.

In addition, a control program for controlling the information processing apparatus for divers that reproduces the change state of the amount of nitrogen in the body at the time of diving with a computer stores an atmospheric pressure history that is a history of atmospheric pressure change until the start of diving, Based on the atmospheric pressure history, the amount of nitrogen in the body at the start, which is the amount of nitrogen in the body at the start of diving, is calculated, and the amount of nitrogen in the body at start and the depth of water at the time of diving are stored in time series based on the profile data It is characterized by recalculating the amount of nitrogen in the body during diving.
In these cases, a change in the amount of nitrogen in the body during the diving may be reproduced and displayed in time series based on the amount of nitrogen in the body after the recalculation.
It is also possible to record each control program on a computer-readable recording medium.

  According to the present invention, diving information including the amount of nitrogen in the body can be more accurately reproduced from the data recorded in the dive computer at the time of diving after completion of diving.

Next, preferred embodiments of the present invention will be described with reference to the drawings.
[1] First Embodiment [1.1] Usage Mode FIG. 1 is a usage mode diagram of the dive computer according to the embodiment.
The diving equipment 100 includes a cylinder unit 1 having a plurality of cylinders 1A and 1B, a switching valve / regulator 2, a water depth / residual pressure gauge 3, and a dive computer 4.

[1.2] Configuration of Dive Computer FIG. 2 is an external front view of the dive computer according to the embodiment.
FIG. 3 is a schematic block diagram of the dive computer.
The dive computer 4 calculates and displays the diver's depth and diving time during diving and measures the amount of inert gas (mainly nitrogen gas) accumulated in the body during diving. It is configured to display safety information such as the time until the nitrogen accumulated in the body is discharged in the state of rising from the water.
In the dive computer 4, arm bands 4B and 4C are connected to the disk-shaped device body 4A in the vertical direction of the drawing, respectively, and the arm bands 4B and 4C are used by being attached to the user's arm in the same manner as a wristwatch. It is like that.

In the apparatus main body 4A2, the upper case and the lower case are fixed by a method such as screwing in a completely watertight state, and various electronic components (not shown) are incorporated. A display unit 10 having a liquid crystal display panel 11 is provided on the front side of the apparatus main body 2 in the drawing.
Further, an operation unit 5 for selecting / switching various operation modes in the dive computer 4 is formed on the lower side of the apparatus main body 2, and the operation unit 5 has two push button type switches A and B. ing. A diving operation monitoring switch 30 using a continuity sensor used to determine whether or not diving has been started is configured on the left side of the apparatus main body 2 in the drawing. This diving operation monitoring switch 30 has electrodes 30A and 30B provided on the front side of the apparatus main body 2 in the drawing, and the resistance between the electrodes 30A and 30B is established between the electrodes 30A and 30B by seawater or the like. It is determined that the water has entered when the value becomes smaller. However, the diving operation monitoring switch 30 is only used for detecting that water has entered and for shifting the operation mode of the dive computer 4 to the diving mode, and detects that the diving has actually started. Is not used for That is, there are cases where the arm of the user wearing the dive computer 4 has just been immersed in seawater, and it is not preferable to determine that diving has started in such a state.

For this reason, in this dive computer, when the water pressure (water depth) exceeds a certain value by the pressure sensor built in the apparatus main body 4A, more specifically, when the water pressure becomes 1.5 [m] or more in the water depth. It is considered that the diving has been completed when the water pressure is less than 1.5 [m] at the water depth.
As shown in FIG. 3, the dive computer 4 is roughly classified into an operation unit 5 for performing various operations, a display unit 10 for displaying various information, a diving operation monitoring switch 30, an alarm sound from a buzzer, and the like. A sounding device 37 that performs notification to the user by vibration, a control unit 50 that controls the entire dive computer, a pressure measuring unit 61 that measures atmospheric pressure or water pressure, and a timekeeping unit that performs various timing processes 68 and a temperature measuring unit 80 for measuring the ambient temperature of the diver.

The display unit 10 includes a liquid crystal display panel 11 for displaying various types of information and a liquid crystal driver 12 for driving the liquid crystal display panel 11.
The control unit 50 is connected to the switches A and B (= the operation unit 5), the diving operation monitoring switch 30, the sound reporting device 37, and the vibration generating device 38, and controls the entire device, and a CPU 51 under the control of the CPU 51. The control circuit 52 for controlling the liquid crystal driver 12 to cause the liquid crystal display panel 11 to perform display corresponding to each operation mode, or for performing processing in each operation mode in the time counter 33 described later, a control program, and A ROM 53 that stores control data and a RAM 54 that temporarily stores various data are provided.

  The pressure measurement unit 61 needs to measure and display the water depth (water pressure) in the dive computer 4 and calculate the amount of inert gas (mainly nitrogen gas) accumulated in the user's body from the water depth and diving time. Therefore, atmospheric pressure and water pressure are measured. The pressure measuring unit 61 controls the pressure sensor 34 constituted by a semiconductor pressure sensor, an amplification circuit 35 for amplifying the output signal of the pressure sensor 34, and analog / digital conversion of the output signal of the amplification circuit 35, and controls And an A / D conversion circuit 36 that outputs to the unit 50.

In the dive computer 4, the time measuring unit 68 outputs a clock signal having a predetermined frequency, and divides the clock signal from the oscillation circuit 31 in order to measure the normal time and monitor the dive time. And a time counter 33 that performs time-counting processing in units of one second based on the output signal of the frequency dividing circuit 32.
The temperature measuring unit 70 detects the temperature, an amplification circuit 72 for amplifying the output signal of the temperature sensor 71, and analog / digital conversion of the output signal of the amplification circuit 72, and sends it to the control unit 50. And an A / D conversion circuit 73 for outputting.

Next, the configuration of the display unit will be described in detail with reference to FIG.
The display surface 11A of the liquid crystal display panel 11 constituting the display unit 10 is configured with seven display areas. In the present embodiment, an example in which the display surface 11A is circular has been described, but the display surface 11A is not limited to a circular shape, and may be another shape such as an elliptical shape, a track shape, or a polygonal shape.
Of the display surface 11A, the first display area 111 located on the upper left side of the drawing is the largest among the display areas, and includes various types such as a diving mode, a surface mode (time display mode), a planning mode, and a log mode. In the operation mode, the current water depth, current month date, water depth rank, and diving date (log number) are displayed.

The second display area 112 is located on the right side of the first display area 111 in the drawing. In the diving mode, the surface mode (time display mode), the planning mode, and the log mode, the diving time, the current time, and no decompression diving are possible. The time and dive start time (dive time) are displayed.
The third display area 113 is located on the lower side of the first display area 111 in the drawing. In the diving mode, the surface mode (time display mode), the planning mode, and the log mode, respectively, the maximum water depth, the body nitrogen discharge time, The safety level and maximum water depth (average water depth) are displayed.
The fourth display area 114 is located on the right side of the third display area 113 in the drawing. In the diving mode, the surface mode (time display mode), the planning mode, and the log mode, the no-decompression dive time, the water surface rest time, The temperature and the dive end time (maximum depth water temperature) are displayed.

The fifth display area 115 is located on the lower side of the third display area 113 in the drawing, and the power supply capacity out warning display section 104 for displaying power out of capacity and the altitude rank for displaying the altitude rank to which the user's current altitude belongs. A display unit 103 is provided.
The sixth display area 116 is located on the lower left side of the drawing on the display surface 11A, and the amount of nitrogen in the body is displayed in a graph.
The seventh display area 117 is located on the right side of the sixth display area 116 in the drawing. When the diving mode is in a reduced pressure diving state, nitrogen gas (inert gas) tends to be absorbed or discharged. An area indicating whether there is an up / down arrow in the figure, an area displaying “SLOW” for instructing deceleration as one of the ascent warnings when the ascent speed is too high, and diving And an area for displaying “DECO” for warning that decompression diving must be performed.

[1.3] Functional configuration of the dive computer according to the first embodiment when the nitrogen amount is calculated FIG. 4 is a functional configuration block diagram for realizing the nitrogen amount calculating function of the dive computer.
Next, a functional configuration for calculating the amount of nitrogen accumulated in the diver in the dive computer will be described with reference to the block diagram of FIG.
As shown in FIG. 4, the dive computer includes a timekeeping unit 68, a display unit 10, and a pressure measurement unit 61, a respiratory nitrogen partial pressure measuring unit 81, a respiratory nitrogen partial pressure storage unit 82, a comparison unit 83, a half-saturation. Time selection unit 84, body nitrogen partial pressure calculation unit 85, body nitrogen partial pressure storage unit 86, body nitrogen partial pressure storage unit 87 at the start of diving, body nitrogen partial pressure recalculation unit 88, water depth data storage unit 89, and respiratory air nitrogen A recalculator 90 is provided. These can be realized by each component shown in FIG. 3 and software executed by the CPU 51, ROM 53, and RAM 54. However, the present invention is not limited to this, and it is also possible to realize only a logic circuit that is hardware, or a combination of a logic circuit, a processing circuit including a CPU, and software.

The respiratory nitrogen partial pressure measuring unit 81 calculates a respiratory nitrogen partial pressure PIN2 (t), which will be described later, based on the water pressure P (t) at the current time t that is the measurement result of the pressure measuring unit 61.
Thus, the respiratory air nitrogen partial pressure storage unit 82 stores the nitrogen partial pressure PIN2 (t) of the respiratory air measured by the respiratory air nitrogen partial pressure measurement unit 81.
On the other hand, the half-saturation time selector 84 outputs the half-saturation time TH used when calculating the partial nitrogen pressure in the body to the partial nitrogen pressure calculator 85. The body nitrogen partial pressure calculation unit 85 calculates a body nitrogen partial pressure PGT (t), which will be described later, for each tissue site having different nitrogen absorption / extraction rates. The body nitrogen partial pressure storage unit 86 stores the body nitrogen partial pressure PGT (t) calculated by the body nitrogen partial pressure calculation unit 85.
As a result, the comparison unit 83 compares the respiratory air nitrogen partial pressure PIN2 (t) and the body nitrogen partial pressure PGT (t), and varies the half-saturation time TH based on the comparison result.

Further, the in-vivo nitrogen partial pressure storage unit 87 at the start of diving stores the initial in-vivo nitrogen partial pressure PGTini for all compartments (internal tissues) at the start of diving. The water depth data storage unit 89 stores the water depth data obtained by converting the water pressure, which is the measurement result of the pressure measuring unit 61, into the water depth value as profile data in time series at every predetermined timing during diving. The breathing air nitrogen recalculation unit 90 recalculates the partial pressure of nitrogen in the breathing air along each time axis based on the water depth value corresponding to the water depth data stored in the water depth data storage unit 89.
As a result, the in-vivo nitrogen partial pressure recalculation unit 88 outputs the initial in-vivo nitrogen partial pressure PGTini stored in the in-vivo nitrogen partial pressure storage unit 87 and the breathing nitrogen recalculation unit 90 during diving. By recalculating the body nitrogen partial pressure during diving based on the respiratory nitrogen partial pressure along the time axis, the change in the body nitrogen partial pressure during diving is reproduced and displayed on the display unit 10.

[1.4] (Re) calculation method of nitrogen partial pressure in the body of the first embodiment Next, a specific calculation method of nitrogen partial pressure in the body will be described. Regarding the calculation method of the partial pressure of nitrogen in the dive computer 4 of this embodiment, for example, “DIVE COMPUTERS A CONSUMER'S GUIDE TO HISTORY, THEORY &” by KEN LOYST et al.
PERFORMANCE ”Watersport Publishing Inc. (1991),“ Decompression-Decompression Sickness ”by AABuhlmann (especially page 14), Springer, Berlin (1984). In addition, the calculation method of the nitrogen partial pressure shown here is only an example, and various other methods can be used.
First, the pressure measuring unit 61 outputs the water pressure P (t) corresponding to the time t. Here, P (t) means absolute pressure including atmospheric pressure.
The respiratory nitrogen partial pressure measuring unit 81 calculates a respiratory nitrogen partial pressure PIN2 (t) corresponding to the air that the diver is breathing based on the water pressure P (t) output from the pressure measuring unit 61. ,Output.

Here, the respiratory nitrogen partial pressure PIN2 (t) is calculated by the following formula using the water pressure P (t).
PIN2 (t) = 0.79 × P (t) [bar] (1)
In addition, “0.79” in the equation (1) is a numerical value indicating the ratio of nitrogen in the air. The respiratory air nitrogen partial pressure storage unit 82 stores the value of the respiratory air nitrogen partial pressure PIN2 (t) calculated by the respiratory air nitrogen partial pressure measurement unit 81 as shown in the equation (1).
The internal nitrogen partial pressure calculation unit 85 calculates the internal nitrogen partial pressure for each compartment (internal tissue) having a different nitrogen absorption / extraction rate.

For example, taking one compartment as an example, the partial nitrogen pressure PGT (tE) absorbed / extracted by the dive time t = t0 to tE is the partial nitrogen pressure PGT (tGT) at the start of calculation (= t0). t0) is calculated by the following equation.
PGT (tE) = PGT (t0)
+ {PIN2 (t0) -PGT (t0)}
X {1-exp (-K (tE-t0) / HT)} (2)
Here, K is a constant obtained experimentally, and HT is the time required for nitrogen to dissolve in each compartment and reach half of the saturation state (hereinafter referred to as half-saturation time). is there. As will be described later, the half-saturation time HT is variable depending on the magnitudes of PGT (t0) and PIN2 (t0). Note that the measurement of time such as time t0 and time tE is managed by the time measuring unit 68 shown in FIG.

The in-vivo nitrogen partial pressure calculation unit 85 repeatedly executes the calculation of the in-vivo nitrogen partial pressure PGT (t) as described above at a predetermined sampling period tE. At this time, the in-vivo nitrogen partial pressure PGT (t) calculated for each sampling period is supplied to the in-vivo nitrogen partial pressure storage unit 86 and also supplied to the comparison unit 83 as PGT (t0). This means that PGT (tE) at the previous sampling is used as PGT (t0) in the equation.
At the start of diving, the initial nitrogen partial pressure PGTini = PGT (t0) is supplied to the in-vivo nitrogen partial pressure storage unit 87 when diving is started.

Prior to the above calculation, the comparison unit 83 calculates the respiratory nitrogen partial pressure PIN2 (t0) stored in the respiratory nitrogen partial pressure storage unit 82 and the PGT (t0) supplied from the body nitrogen partial pressure storage unit 86. ) And the comparison result is output to the half-saturation time selector 84. The half-saturation time selection unit 84 stores two types of half-saturation times HT (half-saturation times HT1 and HT2 described later) that the in-vivo nitrogen partial pressure calculation unit 85 should use for partial pressure calculation. Accordingly, the half-saturation time HT1 or HT2 is selected as the half-saturation time HT and is output to the in-vivo nitrogen partial pressure calculation unit 85.
The body nitrogen partial pressure calculator 85 uses the half-saturation time HT1 or HT2 selected by the half-saturation time selector 84 to calculate the body nitrogen partial pressure PGT (tE) at time t = tE by the following equation. .

(A) When PGT (t0)> PIN2 (t0) PGT (tE) = PGT (t0) + {PIN2 (t0) -PGT (t0)}
X {1-exp (-K (tE-t0) / HT1)} (3)
(B) When PGT (t0) <PIN2 (t0) PGT (tE) = PGT (t0) + {PIN2 (t0) -PGT (t0)}
X {1-exp (-K (tE-t0) / HT2)} (3 ')
In the above equations (3) and (3 ′), HT2 <HT1. When PGT (t0) = PIN2 (t0), the half-saturation time HT is preferably determined as follows:
HT = (HT1 + HT2) / 2 (4)

Here, the reason why the half-saturation time HT is different between PGT (t0)> PIN2 (t0) and PGT (t0) <PIN2 (t0) will be described.
First, when PGT (t0)> PIN2 (t0), nitrogen is discharged from the body. Conversely, when PGT (t0) <PIN2 (t0), nitrogen is absorbed into the body. is there. That is, since the discharge of nitrogen takes longer than the absorption of nitrogen, the half-saturation time HT1 when nitrogen is discharged is set longer than the half-saturation time HT2 when nitrogen is absorbed. Thus, by using different half-saturation times HT at the time of excretion and absorption, the simulation of the amount of nitrogen in the body can be performed more strictly.

Therefore, based on the nitrogen partial pressure obtained by the in-vivo nitrogen partial pressure calculation unit 85, a more accurate value can be calculated when obtaining the no-decompression dive possible time and the in-vivo nitrogen discharge time as described later. It becomes possible. The in-vivo nitrogen partial pressure calculation unit 85 can obtain the latest in-vivo nitrogen partial pressure for the diver who is diving by calculating the in-vivo nitrogen partial pressure PGT (t) as described above.
Similarly, when recalculating the in-vivo nitrogen partial pressure on land after diving, the in-vivo nitrogen partial pressure recalculating unit 88 stores the initial in-vivo nitrogen partial pressure stored in the in-vivo nitrogen partial pressure storage unit 87 at the time of diving. Based on the pressure PGTini, the respiratory air nitrogen partial pressure output along the time axis during diving and the expressions (3) and (3 ′) output from the respiratory air nitrogen recalculating unit 90, By recalculating the in-vivo nitrogen partial pressure at the time of diving by the same method, the change in the in-vivo nitrogen partial pressure at the time of diving is reproduced and displayed on the display unit 10.

[1.5] Calculation method of non-decompression diving possible time and body nitrogen excretion time The body nitrogen partial pressure PGT (tE) obtained as described above and t = calculated by the respiratory nitrogen partial pressure measuring unit 81 Based on the partial pressure of respiratory air nitrogen PIN2 (tE) at tE, the non-decompressible diving possible time and the body nitrogen excretion time are calculated as follows.
The no-decompression dive possible time is calculated by obtaining (tE-t0) when PGT (tE) calculated in the equation becomes Ptol indicating the allowable supersaturated nitrogen amount of each tissue. At this time, since the present time is considered to be t0, the in-vivo nitrogen partial pressure PGT (tE) obtained by the in-vivo nitrogen partial pressure calculation unit 85 is used as PGT (t0) in the equation, and respiratory nitrogen is used as PIN2 (t0). The respiratory nitrogen partial pressure PIN2 (tE) calculated by the partial pressure measuring unit 81 is used.

That is,
tE−t0 = −HT × (ln (1-f)) / K (5)
However,
f = (Ptol-PGT (tE)) / (PIN2 (tE) -PGT (tE)). By this formula, all the decompression-free diving time in each tissue is calculated, and the smallest value among them is the no-decompression diving time to be obtained. The no-decompression diving possible time calculated in this way is displayed in a diving mode as described later.

Next, a method for calculating the in-body nitrogen excretion time until the in-vivo nitrogen is exhausted after the surface of the water floats will be described.
To calculate the body nitrogen excretion time, the above-mentioned PGT (tE) = PGT (t0) + {PIN2 (t0) -PGT (t0)}
X {1-exp (-K (tE-t0) / HT)} (6)
, When the surface of the water surface is t0
PGT (tE) = 0
What is necessary is just to obtain tE which becomes.

However, in the exponential function as in the above formula, PGT (tE) = 0 is not obtained unless tE is infinite. For convenience, the in-vivo nitrogen excretion time tZ for each tissue is calculated using the following formula. ing.
tZ = −HT × ln (1-f) / K (7)
here,
f = (Pde−PIN2) / (0.79−PIN2)
It is. Further, HT is the half-saturation time described above, and Pde is a nitrogen partial pressure (hereinafter referred to as allowable nitrogen partial pressure) regarded as residual nitrogen discharge for each tissue, and these are all known values. PIN2 is the nitrogen partial pressure in each tissue when the surface of the water floats, and is a value calculated by the in-vivo nitrogen partial pressure calculation unit 85. TZ is calculated for each tissue by the above formula, and the largest value among them is the body nitrogen excretion time. The in-vivo nitrogen excretion time calculated in this way is displayed in the surface mode as described later.

[1.6] Operation of the First Embodiment Next, the operation of the dive computer 4 having the above configuration will be described.
FIG. 5 is a diagram schematically showing transition of the display screen in various operation modes of the dive computer.
As shown in FIG. 5, the operation modes of the dive computer 4 include a time mode ST1, a surface mode ST2, a planning mode ST3, a setting mode ST4, a diving mode ST5, a log mode ST6, and a nitrogen amount calculation profile mode ST7.
Hereinafter, various operation modes will be described. Note that the processing in these various operation modes is executed by the control / arithmetic unit 9 as described above.

[1.6.1] Time Mode Time mode ST1 is an operation mode when the switch is not operated and the partial pressure of nitrogen in the body is in an equilibrium state and is carried on land. In this time mode, the liquid crystal display panel 11 displays the current date, current time, and altitude rank as shown in FIG. When the altitude rank = 0, the altitude rank display is not performed. Specifically, in FIG. 5, it means that the current date is December 5 and the current time is 10:06, and in particular, the current time is indicated by a flashing colon (:). To inform the user that the current time is displayed.
When the switch A is pressed in the time mode ST1, the mode is shifted to the planning mode ST3. When the switch B is pressed, the log mode ST6 is entered. Further, when the switch B is continuously pressed for a predetermined time (for example, 5 seconds) while the switch A is being pressed from the planning mode ST3, the mode is shifted to the setting mode ST4.

[1.6.2] Surface mode Surface mode ST2 is a mode for carrying on land until 48 hours have passed since the last dive, and the dive computer 4 is in a conductive state during the dive after the end of the previous dive. When the diving operation monitoring switch 30 according to the above is in an insulated state, the mode automatically shifts to the surface mode ST2. In the surface mode ST2, in addition to the current date and time, current time and altitude rank displayed in the time mode ST1, the in-vivo nitrogen discharge time is displayed in a countdown manner. However, when the time to be displayed as the body nitrogen excretion time reaches 0 hour 00 minutes, the display is not performed thereafter. Further, in the surface mode ST2, the elapsed time after the end of diving is displayed as the water surface pause time. This water surface downtime 202 starts in the diving mode to be described later, and the next point where the water depth is shallower than 1.5 meters is counted as the end of the dive. Become. Accordingly, in the dive computer 4, the surface mode ST2 is set on land until 48 hours have elapsed after the dive is completed, and thereafter, the mode is shifted to the time mode ST1.

Specifically, in the surface mode ST2 shown in FIG. 5, it is displayed that the water surface rest time is 1 hour and 13 minutes, that is, 1 hour and 13 minutes have passed since the end of diving. In addition, it is displayed that the amount of nitrogen absorbed in the body by diving performed so far is equivalent to 4 marks in the body nitrogen graph, and from this state until excess nitrogen in the body is exhausted and the state of equilibrium is reached The time, that is, the body's nitrogen excretion time is 10 hours and 55 minutes.
When the switch A is pressed in the surface mode ST2, as shown in FIG. 5, the mode is shifted to the planning mode ST3. When the switch B is pressed, the log mode ST6 is entered. Further, when the switch B is continuously pressed for a predetermined time (for example, 5 seconds) while the switch A is being pressed from the planning mode ST3, the mode is shifted to the setting mode ST4.

[1.6.3] Planning Mode The planning mode ST3 is an operation mode in which the maximum depth of the next dive to be performed and a guide for the dive time can be input before the dive. In this planning mode ST3, the water depth rank, the no-decompression diving possible time, the water surface pause time, and the body nitrogen graph are displayed. The display of the rank of the water depth rank changes sequentially every predetermined time. Each depth rank is, for example, 9m, 12m, 15m, 18m, 21m, 24m, 27m, 30m, 33m, 36m, 39m, 42m, 45m, 48m, and the display is switched every 5 seconds. Has been. In this case, if the mode is shifted from the time mode ST1 to the planning mode ST3, there is no excessive nitrogen accumulation in the body due to past diving, that is, the planning mark for the first diving, so the display mark of the in-vivo nitrogen graph is 0. More specifically, as shown in FIG. 5 (see reference ST3), when the water depth is 15 m, the non-decompression dive possible time = 66 minutes is displayed. This means that decompression diving is possible up to less than 66 minutes at a depth of 12 to 15 m.

On the other hand, if the mode is shifted from the surface mode ST2 to the planning mode ST3, as shown in FIG. 5, the plan is repetitive diving planning in which excessive nitrogen accumulation in the body is caused by past diving. Four marks are displayed. For example, when the water depth is 15 m, a non-decompression dive time = 45 minutes is displayed. This means that decompression diving is possible up to less than 45 minutes at a water depth of 12 m or more and 15 m or less.
When the switch A is pressed while the water depth rank is sequentially displayed from 9 m to 48 m in the planning mode ST3, as shown in FIG. 5, the mode is shifted to the surface mode ST2. Further, after the water depth rank is displayed as 48 m, the mode automatically shifts to the time mode ST1 or the surface mode ST2. Thus, when there is no switch operation for a predetermined period, it automatically shifts to the surface mode ST2 or the time mode ST1, so that it is not necessary to perform the switch operation each time, which is convenient for divers. When the switch B is pressed, the log mode ST6 is entered.

[1.6.4] Setting mode Setting mode ST4 is an operation mode for setting on / off of a warning alarm and setting of a safety level, in addition to setting of the current month and day and current time. In this setting mode ST4, in addition to the current date, current year, and current time, a safety level (not shown), alarm on / off (not shown), and altitude rank (not shown) are displayed. . Among these display items, the safety level can be selected from two levels: a level for performing normal decompression calculation and a level for performing decompression calculation on the premise that the vehicle moves to a place of an altitude rank that is one rank higher after diving. Is possible. In addition, when there is excessive nitrogen accumulation in the body due to past diving, a body nitrogen graph is also displayed.

  The alarm on / off is a function for setting whether or not various warning alarms are sounded from the notification device 13. If the alarm is set to off, the alarm does not sound. This is because an apparatus that needs to avoid battery exhaustion as much as possible, such as an information processing apparatus for divers, can avoid power consumption due to an alarm and inadvertent battery exhaustion, which is convenient. Note that the alarm may be turned on when the ascent rate is violated or during decompression diving.

  In this setting mode ST4, each time the switch A is pressed, the setting items are switched in the order of hour, second, minute, year, month, day, safety level, alarm on / off, and the display of the setting target portion flashes. At this time, the value or character of the setting item changes when the switch B is pressed, and the value or character of the setting item changes quickly when the switch B is held down. Further, when the switch A is pressed while the alarm on / off is blinking, the mode returns to the surface mode ST2 or the time mode ST1. Further, when the switches A and B are pressed at the same time while the alarm ON / OFF is blinking, the flow shifts to the nitrogen amount calculation profile mode ST7. Furthermore, if neither of the switches A and B is operated for a predetermined period (for example, 1 to 2 minutes), the mode automatically returns to the surface mode ST2 or the time mode ST1.

[1.6.5] Diving mode The diving mode ST5 is an operation mode during diving, and includes a no-decompression diving mode ST51, a current time display mode ST52, and a decompression diving display mode ST53.
In the no-decompression diving mode ST51, information necessary for diving such as the current water depth, diving time, maximum water depth, no-decompression diving possible time, body nitrogen graph, altitude rank, and the like is displayed.
In the case of the above-described example, in the no-decompression diving mode ST51 shown in FIG. 5, 12 minutes have passed since the start of diving, and the diver is currently located at a depth of 15.0 m. It is displayed that no decompression diving can be continued for another 42 minutes. Further, it is displayed that the maximum water depth up to now is 20.0 m, and further that the current amount of nitrogen in the body is at a level where four marks in the body nitrogen graph 203 are lit.

  In this diving mode ST5, since the rapid ascent causes decompression sickness, the ascent speed monitoring means works. That is, the current ascent rate is calculated every predetermined time (for example, every 6 seconds), and the calculated ascent rate is compared with the ascent rate upper limit value corresponding to the current water depth. If it is faster, the alarm device 13 issues an alarm sound (a rising speed violation warning alarm) at a frequency of 4 [kHz] for 3 seconds and displays “SLOW” on the liquid crystal display panel 11 so as to reduce the rising speed. And the display of the current water depth are alternately displayed at a predetermined cycle (for example, a cycle of 1 second) to issue a rising speed violation warning. Further, the vibration generator 38 warns the diver that the ascent rate is violated. Then, when the ascent speed drops to a normal level, the ascent speed violation warning is stopped.

  Further, in the diving mode ST5, when the switch B is pressed, the current time display mode ST52 is shifted and the current time and the current water temperature are displayed only while the switch A is kept pressed. Specifically, in the current time display mode ST52 shown in FIG. 5, it is displayed that the current time is 10:18 and the current water temperature is 23 [° C.]. As described above, when there is a switch operation to that effect in the diving mode ST5, the current time and the current water temperature are displayed only for a predetermined period, so that normally only data necessary for diving is displayed in a small display screen. Even if configured, it is convenient because the current time and the like can be displayed as necessary. In addition, in the diving mode ST5 as described above, since the switch operation is used for switching the display, it is possible to display information that the diver wants to know at an appropriate timing.

  Further, when the water surface ascends to a depth of less than 1.5 m in the diving mode ST5, it is considered that the diving is completed, and the diving operation monitoring switch 30 is in an insulated state due to diving and becoming conductive. At the time, the mode automatically shifts to the surface mode ST2. In addition, from the time when the water depth becomes 1.5 m or more to the time when the water depth becomes less than 1.5 m again, the diving operation during this period (diving date, diving time, maximum water depth, etc.) Are stored in the RAM 54. At the same time, if there are two or more consecutive ascent speed violation warnings during the current dive, this is also included in the diving result.

The dive computer of this embodiment is configured on the premise of no decompression diving, but when it is necessary to perform decompression diving, an alarm to that effect is turned on and the diver is notified and the operation mode is set. The process proceeds to the decompression diving display mode ST53.
In the decompression diving display mode ST53, the current water depth, diving time, body nitrogen graph, altitude rank, decompression stop depth, decompression stop time, and total ascent time are displayed. Specifically, in the decompression diving display mode ST53 shown in FIG. 5, it is displayed that 24 minutes have elapsed from the start of diving and the water depth is 29.5 m. Further, since the amount of nitrogen in the body exceeds the maximum allowable value and is dangerous, an instruction is displayed to ascend to a depth of 3 m while maintaining a safe ascent rate, and to stop decompression for 1 minute there. The diver floats after stopping the decompression based on the display content as described above, and while the decompression is being performed, the downward arrow indicates that the amount of nitrogen in the body is decreasing.

  In the above description, the method of storing the water temperature in the log (diving history) has been described, but the water temperature may be stored in the profile. The profile information basically leaves the water depth at a set time interval or every specified time interval. In other words, it is used to confirm what diving pattern was performed after diving and to refer to it as subsequent diving information. By storing the water temperature at the same time, the pattern of temperature change can be grasped simultaneously with the diving pattern. .

[1.6.6] Log Mode The log mode ST6 is a function for storing and displaying various data when diving at a depth of more than 1.5 m for 3 minutes or more in the diving mode ST5. Such diving data is sequentially stored as log data for each diving, and a predetermined number (for example, 10 times) of diving log data is stored and held. Here, when diving more than the maximum storage number, the oldest data is deleted in order from the old data, and the latest log data is always stored. Note that even when diving more than the maximum number of memories, it is possible to configure so that a part of the log data is retained without being deleted by setting in advance.

  It is possible to shift to the log mode ST6 by pressing the switch B in the time mode ST1 or the surface mode ST2. In the log mode ST6, the log data has two mode screens that are switched every predetermined time (for example, 4 seconds). As shown in FIG. 5, in the first log mode ST61, the diving date, the average water depth, the diving start time, the diving end time, the altitude rank, and the body nitrogen graph at the time when the diving is completed are displayed. In the second log mode ST62, the log number indicating the number of dives on the day of diving, the maximum water depth, the diving time, the water temperature at the maximum water depth, the altitude rank, and the body nitrogen graph when the diving is finished Is displayed.

  Specifically, as shown in FIG. 5 (see reference ST6), in the second dive on December 5 in the state of altitude rank = 0, diving starts at 10:07 and 10:45. Is displayed, indicating that it was a 38-minute dive. In this diving, the average water depth is 14.6 m, the maximum water depth is 26.0 m, and the water temperature at the maximum water depth is 23 [° C]. This means that the gas was absorbed in the body.

As described above, in the log mode ST6 of the present embodiment, various information is displayed while automatically switching between the two mode screens, so that the amount of information that can be substantially displayed can be increased even if the display screen is small. Visibility does not decrease.
Further, in the log mode ST6, every time the switch B is pressed, the display is sequentially switched from the new data to the old data, and after the oldest log data is displayed, the mode shifts to the time mode ST1 or the surface mode ST2. Even in a state in which a part of all the log data has been displayed, it is possible to shift to the time mode ST1 or the surface mode ST2 by continuously pressing the switch B for 2 seconds or more. Further, even if neither of the switches A and B is operated for a predetermined time (1 to 2 minutes), the operation mode automatically returns to the surface mode ST2 or the time mode ST1. Therefore, it is not necessary for the diver to perform a switch operation, and usability is improved. Further, when the switch A is pressed, the mode shifts to the planning mode ST3.

[1.6.7] Nitrogen amount calculation profile mode It is possible to shift from the setting mode ST4 to this nitrogen amount calculation profile mode ST7 by simultaneously pressing the switches A and B (for example, for 5 seconds).
In this nitrogen amount calculation profile mode ST7, the diver after the diving finishes the initial nitrogen amount from the depth data stored in the depth data storage unit 89 based on the initial nitrogen amount recalculated or recorded. This mode recalculates the nitrogen partial pressure and confirms what kind of diving was being performed.

FIG. 6 is an explanatory diagram illustrating an example of a display screen in the nitrogen amount calculation profile mode ST7.
In this nitrogen amount calculation profile mode ST7, the partial nitrogen pressure in the diving is recalculated and reproduced.
That is, after shifting to the nitrogen amount calculation profile mode ST7, the initial nitrogen amount of the currently selected diving is read (loaded) from the RAM 54 functioning as the in-vivo nitrogen partial pressure storage unit 87 at the start of diving, so Recalculation is started by the CPU 51 functioning as the partial pressure recalculation unit 88.

As a result, dive time and diving depth data are automatically updated every predetermined time (for example, about 2 seconds), and the amount of nitrogen in the body and the infinite pressure dive time are recalculated accordingly, as if diving. As in the dive mode ST5, the nitrogen amount graph 701 and the infinite pressure dive possible time 702 are displayed in time series as time passes during diving.
Therefore, the user can easily check the fluctuation of the amount of nitrogen in the body (the partial pressure of nitrogen in the body) with the lapse of time during diving by looking at the display contents, and can grasp the diving situation in more detail.
In particular, it is possible to accurately grasp the initial amount of nitrogen in a diving where the initial amount of nitrogen in the body could not be grasped by boarding an airplane before the start of diving or by going over a ridge by car etc. The dive computer processing algorithm can be verified.

[2] Second embodiment [2.1] Functional configuration of the dive computer of the second embodiment when calculating the nitrogen amount Next, a functional configuration of the dive computer of the second embodiment when calculating the nitrogen amount will be described.
FIG. 7 is a functional configuration block diagram for realizing the nitrogen amount calculation function of the dive computer in the second embodiment.
Next, a functional configuration for calculating the amount of nitrogen accumulated in the diver in the dive computer will be described with reference to the block diagram of FIG. 7 differs from FIG. 4 in that, instead of the diving start body nitrogen partial pressure storage unit 87, the atmospheric pressure history storage unit 91 that stores the change history of the atmospheric pressure before the start of diving and the atmospheric pressure history storage unit 91 store them. Based on the change history of the atmospheric pressure, the initial in-vivo nitrogen partial pressure PGTini for all the compartments (body tissues) at the start of diving is calculated and output to the in-vivo nitrogen partial pressure recalculation unit 88. And a calculation unit 92. Since other parts are the same, detailed description is omitted.

  The atmospheric pressure history storage unit 91 and the diving start body nitrogen partial pressure calculation unit 92 can be realized by the components shown in FIG. 3 and software executed by the CPU 51, ROM 53, and RAM 54. However, the present invention is not limited to this, and it is also possible to realize only a logic circuit that is hardware, or a combination of a logic circuit, a processing circuit including a CPU, and software.

[2.2] Operation of Second Embodiment According to the above configuration, the atmospheric pressure history storage unit 91 stores an atmospheric pressure change history before the start of diving.
Based on the change history of the atmospheric pressure stored in the atmospheric pressure history storage unit 91, the in-vivo nitrogen partial pressure calculation unit 92 at the start of diving calculates the initial in-vivo nitrogen partial pressure PGTini for all compartments (internal tissues) at the start of diving. Output to the nitrogen partial pressure recalculator 88.
As a result, the in-vivo nitrogen partial pressure recalculation unit 88 outputs the initial in-vivo nitrogen partial pressure PGTini stored in the in-vivo nitrogen partial pressure storage unit 87 and the breathing nitrogen recalculation unit 90 during diving. By recalculating the body nitrogen partial pressure during diving based on the respiratory nitrogen partial pressure along the time axis, the change in the body nitrogen partial pressure during diving is reproduced and displayed on the display unit 10.

  Then, when recalculating the in-vivo nitrogen partial pressure on land after the diving is finished, the in-vivo nitrogen partial pressure recalculating unit 88 is based on the change history of the atmospheric pressure before the start of diving stored in the atmospheric pressure history storage unit 91. The initial nitrogen partial pressure PGTini calculated by the in-vivo nitrogen partial pressure calculating unit 92 at the start of diving, the respiratory nitrogen partial pressure along the time axis during diving output from the respiratory nitrogen recalculating unit 90, and (3 ) And (3 ') Based on the formula, the partial pressure of nitrogen in the body during diving is reproduced by recalculating the partial pressure of nitrogen in the body using the same method as the partial pressure calculator 85 in the body. And displayed on the display unit 10.

[3] Effects of Embodiments As described above, according to each embodiment, diving information including the amount of nitrogen in the body can be more accurately reproduced from the data recorded in the dive computer at the time of diving, Changes in the amount of nitrogen in the body (partial nitrogen partial pressure) over time during diving can be easily confirmed, and the diving status can be grasped in more detail.
In addition, even when boarding an airplane before starting diving or crossing a ridge by car, the initial amount of nitrogen in the body can be accurately grasped, and the processing algorithm of the dive computer can be verified.

[4] Modified Example [4.1] First Modified Example In the above description, the case where a control program for controlling the dive computer is stored in the ROM in advance has been described. However, various magnetic disks, optical disks, and memories are used. It is also possible to record the control program in a recording medium such as a card in advance, read from the recording medium, and install it. It is also possible to provide a communication interface and download the control program via a network such as the Internet or LAN, and install and execute the program. By configuring in this way, it becomes possible to configure a dive computer having a higher function in terms of software and higher reliability.

[4.2] Second Modification In the above description, the dive computer is an arm-mounted type. However, the present invention is not limited to this, and the dive computer is embedded in a diving suit, a trunk-mounted type, or underwater. Variations such as a mask built-in type can be considered.

It is a use mode figure at the time of constituting the living body information monitoring device of an embodiment as an information processor for divers. It is a top view of the information processing apparatus for divers of this embodiment. It is a block diagram of the information processing apparatus for divers. It is a functional block diagram for realizing the nitrogen amount calculation function of the dive computer. It is a figure showing typically transition of a display screen in various operation modes of a dive computer. It is explanatory drawing of an example of the display screen in nitrogen amount calculation profile mode ST7. It is a functional block diagram for realizing the nitrogen amount calculation function of the dive computer of the second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 4 ... Dive computer (divers information processor), 5 ... Operation part, 10 ... Display part, 11 ... Liquid crystal display panel, 12 ... Liquid crystal driver, 30 ... Diving operation monitoring switch, 37 ... Sound report device, 38 ... Vibration generation Device 50... Controller 51 51 CPU 52 Control circuit 53 ROM 54 RAM 61 Pressure measuring unit 68 Time measuring unit 70 Acceleration unit 80 Temperature measuring unit 81 Breathing Pneumatic nitrogen partial pressure measuring unit, 82 ... Respiratory nitrogen partial pressure storage unit, 83 ... Comparison unit, 84 ... Semi-saturation time selection unit, 85 ... In-body nitrogen partial pressure calculation unit, 86 ... In-body nitrogen partial pressure storage unit, 87 ... Nitrogen partial pressure storage unit in body at start of diving, 88 ... Nitrogen partial pressure recalculation unit in body, 89 ... Water depth data storage unit, 90 ... Respiratory nitrogen recalculation unit, 91 ... Air pressure history storage unit, 92 ... Nitrogen in body at start of diving Partial pressure calculator

Claims (10)

An information processing device for divers that reproduces changes in the amount of nitrogen in the body during diving after diving,
A starting nitrogen amount storage unit for storing a starting nitrogen amount that is an amount of nitrogen in the body at the start of diving;
A body nitrogen amount recalculation unit for recalculating the body nitrogen amount at the time of diving based on profile data in which the body nitrogen amount at the start time and the water depth at the time of diving are stored in time series;
An information processing apparatus for divers, comprising: An information processing device for divers that reproduces changes in the amount of nitrogen in the body during diving after diving,
An atmospheric pressure history storage unit for storing an atmospheric pressure history that is a history of changes in atmospheric pressure until the start of diving;
Based on the atmospheric pressure history, a starting nitrogen amount calculating unit that calculates a starting nitrogen amount that is an in-body nitrogen amount at the start of the diving,
A body nitrogen amount recalculation unit for recalculating the body nitrogen amount at the time of diving based on profile data in which the body nitrogen amount at the start time and the water depth at the time of diving are stored in time series;
An information processing apparatus for divers, comprising: In the information processing apparatus for divers according to claim 1 or 2,
An information processing apparatus for divers, comprising: a display unit that reproduces and displays a change in the amount of nitrogen in the body during diving based on the amount of nitrogen in the body after the recalculation. In the information processing apparatus for divers in any one of Claims 1 thru | or 3,
The information processing apparatus for divers, wherein the body nitrogen amount is processed as a body nitrogen partial pressure. A control method for an information processing device for divers that reproduces the state of change in the amount of nitrogen in the body during diving after diving,
A starting nitrogen amount storage process for storing the starting body nitrogen amount, which is the amount of nitrogen in the body at the start of diving,
Recalculating the body nitrogen amount during the diving based on the profile data storing the body nitrogen amount at the start and the water depth during diving in time series; and
A method for controlling an information processing apparatus for divers, comprising: A control method for an information processing device for divers that reproduces the state of change in the amount of nitrogen in the body during diving after diving,
Atmospheric pressure history storage process for storing atmospheric pressure history, which is the history of atmospheric pressure change until the start of diving,
Based on the atmospheric pressure history, starting nitrogen amount calculation process to calculate the starting body nitrogen amount which is the body nitrogen amount at the start of the diving,
Recalculating the body nitrogen amount during the diving based on the profile data storing the body nitrogen amount at the start and the water depth during diving in time series; and
A method for controlling an information processing apparatus for divers, comprising: A control program for controlling an information processing device for divers that reproduces the state of change in the amount of nitrogen in the body during diving after diving by a computer,
Memorize the amount of nitrogen in the body that is the amount of nitrogen in the body at the start of diving,
Recalculating the body nitrogen amount at the time of diving based on profile data in which the body nitrogen amount at the start time and the water depth at the time of diving are stored in time series,
A control program characterized by that. A control program for controlling an information processing device for divers that reproduces the state of change in the amount of nitrogen in the body during diving after diving by a computer,
Store the atmospheric pressure history that is the history of atmospheric pressure change until the start of diving,
Based on the atmospheric pressure history, the amount of nitrogen in the body that is the amount of nitrogen in the body at the start of the diving is calculated,
Recalculating the body nitrogen amount at the time of diving based on profile data in which the body nitrogen amount at the start time and the water depth at the time of diving are stored in time series,
A control program characterized by that. In the control program according to claim 7 or 8,
A control program that reproduces and displays a change in the amount of nitrogen in the body during the diving in a time series based on the amount of nitrogen in the body after the recalculation. 10. A computer-readable recording medium on which the control program according to claim 7 is recorded.

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