JP4548019B2 - Information processing apparatus for divers, control method for information processing apparatus for divers, control program - Google Patents

Description

The present invention, diver's information processing apparatus, a control method, a control program.

  KEN LOYST et al., “DIVE COMPUTERS A CONSUMER'S GUIDE TO HISTORY, THEORY & PERFORMANCE '” Watersport It is described in detail in Publishing Inc. (1991). The literature on the theory is detailed in “Decompression-Decompression Sickness” by A.A.Buhlmann, Springer, Berlin (1984). Both of these documents suggest that the inert gas dissolved in the body by diving causes decompression sickness. Here, from the viewpoint of more reliably preventing decompression sickness, calculations based on the following formula described in “Decompression-Decompression Sickness” by A.A.Buhlmann, Springer, Berlin (1984), pp. 14 are also being studied.

Pigt (tE) = Pigt (t0)
+ {PIig-Pigt (t0)}
X {1-exp (-ktE)}
In this equation, Pigt (tE) is the body inert gas partial pressure after tE time, Pigt (t0) is the body inert gas partial pressure at time t0, PIig is the inert gas partial pressure of respiratory air, and k is It is a constant determined by the half-saturation time.
According to this equation, when Pigt (t0) <PIig, the body inert gas partial pressure Pigt (tE) increases, that is, absorbs the inert gas, and when Pigt (t0)> PIig, the body inert gas partial pressure is increased. Pigt (tE) decreases, that is, the inert gas is discharged.

  That is, the absorption / extraction of the inert gas into the body is determined by the magnitude relationship between the partial pressure of the inert gas in the body and the inert gas of breathing air, regardless of ascent and descent. Therefore, if the amount of inert gas in the body is grasped from this magnitude relationship, the time required for the amount of inert gas in the body to return to the normal state after diving is completed, that is, the time to be taken on the water surface until the next diving. Thus, the diver can be protected from decompression sickness, and the number of dives that have been considered twice a day can be increased depending on the diving history. From the viewpoint of preventing decompression sickness, it is also important to keep the ascent rate on the water surface.

Therefore, a conventional dive computer has information (= safety ensuring information) necessary to ensure the diver's safety with a certain algorithm, for example, the time until the inert gas accumulated excessively in the body is discharged. And a safe ascent rate is obtained and displayed on a display unit such as a liquid crystal display panel (see, for example, Patent Document 1).
When performing such calculations, personal behavior and biological information are also important parameters, taking into account changes in pressure caused by altitude changes when moving by airplane for diving, and taking into account the individual's pulse rate. It is carried out. In this case, a dive computer that can always be worn on the arm has been proposed from the viewpoint of constantly grasping a change in altitude accompanying the movement of the user, a pulse, and the like.

Also, as other dive computers, in order to use several tanks with different mixing ratios while switching in water, not only nitrogen but also a lot of information such as oxygen and helium is calculated and displayed, and simulation Many convenient functions such as are now being adopted.
In such a dive computer, since such complicated calculations are performed, the current consumption increases in the internal calculation part, and it is necessary to enlarge the battery, and in order to display a lot of important information in an easy-to-see manner, A display device may be used.
As a result, the size of the dive computer used for such applications has become larger.
By the way, in diving, in particular, professional diving, it is generally performed to prepare a back-up device for use equipment.
In this respect, dive computers are no exception, and divers are generally used so that they can be backed up together using a small dive computer that can be always mounted and a large and large dive computer. .
JP 10-338193 A

In this case, since a small dive computer can always be worn on an arm or the like, it is possible to constantly monitor the use environment of a diver who is a user regardless of whether it is on land or underwater, and can provide information in accordance with the user's behavior. However, since the device is small, the amount of information and functions that can be displayed are limited.
On the other hand, in the case of a large dive computer having a large display device, it cannot be always installed, so for example, when moving by airplane, it is put in the cargo compartment, and the user is Information will continue to be collected in different environments (eg, low temperature, low pressure environments).

Therefore, since the data collected by the two dive computers are different, the subsequent calculation results are also different, and there is a problem that the diver who is the user feels uncomfortable.
Accordingly, an object of the present invention is to provide an information processing apparatus for divers capable of presenting a calculation result without any sense of incongruity to a diver who is a user, with almost the same calculation conditions in a plurality of dive computers used as backup equipment, and its control the method is to provide a control program.

In order to solve the above-described problem, a biological information measuring unit that measures a user's biological information and external biological information data that is measured and stored by the external information processing device from the external information processing device are stored. An information receiving unit for receiving, storing the measured biological information as biological information data, a biological information storage unit for storing the external biological information data , and diving based on the biological information data and the external biological information data A safety information presenting unit that generates and presents safety information, which is information for ensuring the safety of the diver, is sometimes provided to a diver who is a user.
According to the said structure, a biometric information measurement part measures a user's biometric information, and outputs it to a biometric information storage part.
The biological information storage unit stores the measured biological information as biological information data.
The safety information presenting unit generates and presents safety information, which is information for ensuring the safety of the diver, to the diver who is the user during diving based on the biological information data.

The divers information processing apparatus includes a biometric information measuring unit that measures the biometric information of the user, and external biometric information that is biometric information data measured and stored by the external information processing apparatus from the external information processing apparatus. Based on an information receiving unit that receives data, the measured biological information as biological information data, a biological information storage unit that stores the external biological information data, the biological information data, and the external biological information data And a safety information presentation unit that generates and presents safety information, which is information for ensuring the safety of the diver, for a diver who is a user during diving.

According to the above configuration, the biological information measuring unit measures the user's biological information and outputs it to the biological information storage unit.
The information receiving unit receives external biometric information data, which is biometric information data measured and stored by the external information processing apparatus, from the external information processing apparatus.
As a result, the biological information storage unit stores the measured biological information as biological information data and also stores external biological information data.
And the safety information presenting unit is safety information that is information for ensuring the safety of the diver with respect to the diver who is the user at the time of diving based on the biometric information data and the external biometric information data stored in the biometric information storage unit. Is generated and presented.

In this case, when the external biometric information is received, information that replaces the portion corresponding to the external biometric information in the biometric information data stored in the biometric information storage unit with the received external biometric information. An updating unit may be provided.
Further, the information updating unit performs the replacement after confirming that the external biometric information data transmitted by the external information processing apparatus matches the external biometric information data actually received. May be.

  Further, the control method of the information processing apparatus for divers includes a biological information measurement process for measuring the biological information of the user, and external information that is stored and stored by the external information processing apparatus from the external information processing apparatus. An information receiving process for receiving biometric information, a biometric information storing process for storing the measured biometric information and storing the external biometric information, and a user during diving based on the biometric information and the external biometric information And a safety information presenting process for generating and presenting safety information, which is information for ensuring the safety of the diver, to the diver.

  The control program for controlling the information processing apparatus for divers by a computer causes the biological information of the user to be measured, the measured biological information is stored, and the diver who is the user at the time of diving is based on the biological information. , Safety information that is information for ensuring the safety of the diver is generated, presented, and the stored biometric information is transmitted to an external information processing apparatus.

The control program for controlling the information processing apparatus for divers by a computer is the biological information that is measured by the external information processing apparatus and stored by the external information processing apparatus by measuring the user's biological information. The external biometric information is received, the measured biometric information is stored, the external biometric information is stored, and the diver's safety against the diver who is the user at the time of diving based on the biometric information and the external biometric information It is characterized by generating and presenting safety information, which is information for ensuring the security.
In this case, when the external biometric information is received, a portion of the stored biometric information corresponding to the external biometric information may be replaced with the received external biometric information.
Further, the replacement may be performed after confirming that the external biometric information transmitted by the external information processing apparatus matches the external biometric information actually received.
The control programs may be recorded on a computer-readable recording medium.

Next, preferred embodiments of the present invention will be described with reference to the drawings.
[1] First Embodiment FIG. 1 is a diagram showing how diving equipment is used when the information processing apparatus for divers of the embodiment is used.
The diving equipment 100 is roughly divided into a tank unit 1 having a plurality of tanks 1A and 1B, a switching valve / regulator 2, a water depth / residual pressure gauge 3, and a small divers information processing apparatus (hereinafter referred to as a dive computer). 4A and a large dive computer 4B.

FIG. 2 is an external front view of the small dive computer according to the embodiment.
The dive computer 4A 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 4A, arm bands 6A and 6B are connected to a disk-shaped device main body 5 in the vertical direction of the drawing, and the arm bands 6A and 6B are used by being attached to a user's arm in the same manner as a wristwatch. It is like that.
The apparatus main body 5 has an upper case and a lower case fixed in a completely watertight state by a method such as screwing, and incorporates various electronic components (not shown). A display section 10 having a liquid crystal display panel 11 is provided on the front side of the apparatus main body 5 in the drawing.

  Further, an operation unit 15 for selecting / switching various operation modes in the dive computer 4A is formed on the lower side of the apparatus body 5 in the drawing, and the operation unit 15 includes two push button type switches A and B. ing. A diving operation switch 30 using a continuity sensor used for determining whether or not diving has been started is configured on the left side of the apparatus main body 5 in the drawing. The diving operation monitoring switch 30 has electrodes 30A and 30B provided on the front side of the apparatus main body 5 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 switch 30 is only used to detect that water has entered and to shift the operation mode of the dive computer 4A to the diving mode, and to detect that the diving has actually started. It is not used for. That is, there are cases where the arm of the user wearing the dive computer 4A is simply immersed in seawater, and it is not preferable to determine that diving has started in such a state.

For this reason, in the dive computer 4A, the water pressure (water depth) is equal to or greater than a certain value by the pressure sensor built in the apparatus main body 5, more specifically, the water pressure is equal to or greater than 1.5 [m] as the water depth. In this case, it is considered that the dive has started, and when the water pressure is less than 1.5 [m] at the water depth, it is considered that the dive has been completed.
Next, the configuration of the display unit will be described in detail with reference to FIG.
A display surface 11A of the liquid crystal display panel 11 constituting the display unit 10 is configured by eight 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, 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 decompression-free 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 in the display area 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 or not (up and down arrows are shown in the figure), an area displaying “SLOW” for instructing deceleration as one of the ascent warnings when the ascending speed is too high, and diving And an area for displaying “DECO” for warning that decompression diving must be performed.
The eighth display area 118 is located on the right side of the second display area 112 and the fourth display area 114 in the drawing, and the ascent speed is displayed in a graph by nine segments. For example, the ascent speed is ascending in the current water depth area. When the upper limit speed is exceeded, all nine segments are blinking to notify the diver that the upper limit speed of levitation in the current water depth has been exceeded.

FIG. 3 is an external front view of the large dive computer according to the embodiment. In FIG. 3, the same parts as those in FIG. 2 are denoted by the same reference numerals, and detailed description thereof is omitted.
As with the dive computer 4A, the dive computer 4B calculates and displays the diver's depth and dive time during diving, and measures the amount of inert gas (mainly nitrogen gas) accumulated in the body during diving. From this measurement result, it is configured to display safety ensuring information such as the time until the nitrogen accumulated in the body is exhausted in a state of rising from the water after diving.
The dive computer 4B is different from the dive computer 4A in appearance in that the oxygen mixing ratio is set to any value in the region adjacent to the lower side of the drawing with respect to the third display region 113 and the fourth display region 114. The eighth display area 118 and the ninth display area 119 in which information for protecting the diver from oxygen sickness (oxygen poisoning) is displayed are provided.

Next, a functional outline configuration of the dive computer will be described.
In this case, since the dive computer 4A and the dive computer 4B have the same configuration, the dive computer 4A will be described.
FIG. 4 is a schematic configuration block diagram of a small dive computer.
As shown in FIG. 4, the dive computer 4A is roughly divided into an operation unit 15 for performing various operations, a display unit 10 for displaying various information, and an external information processing apparatus (in the embodiment, the dive computer 4B). A calculation data transmission unit 26 for transmitting various data (calculation data and various command data), a calculation data receiving unit 27 for receiving various data (calculation data) from an external information processing apparatus (for example, the dive computer 4B). , A diving operation monitoring switch 30, a sounding device 37 for notifying the user by an alarm sound such as a buzzer, a vibration generating device 38 for notifying the user by vibration, a control unit 50 for controlling the entire dive computer, an atmospheric pressure or a water pressure. A pressure measuring unit 61 for measuring and a time measuring unit 68 for performing various time measuring processes are provided.
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 calculation data transmission unit 26 is configured as a wireless transmission circuit, and sends various data (calculation data and various command data) to any external information processing apparatus using radio waves, ultrasonic waves, or light (such as infrared rays). Send. The calculation data transmitting unit 26 transmits command data for verification as necessary for important data such as calculation data received by the calculation data receiving unit 27 described later, and receives it from an external information processing apparatus. To confirm that there is no error in the processed data.
On the other hand, the calculation data receiving unit 27 is configured as a wireless receiving circuit, and uses any one of radio waves, ultrasonic waves, and light (infrared rays, etc.) with an external information processing apparatus (for example, the dive computer 4B). To receive various data (calculation data).
The control unit 50 is connected to the switches A and B (= the operation unit 15), the diving operation monitoring switch 30, the sound reporting device 37, and the vibration generating device 38, and also controls the CPU 51 for controlling the entire device, and 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 It comprises a ROM 53 that stores control data, and a RAM 54 that functions as a biological information storage unit and temporarily stores various data.

  Further, the pressure measuring unit 61 needs to calculate the amount of inert gas (mainly nitrogen gas amount) accumulated in the user's body from the water depth and diving time in the dive computer 4A. Measuring. The pressure measuring unit 61 performs analog / digital conversion of the output signal of the pressure sensor 34 constituted by a semiconductor pressure sensor, the amplification circuit 35 for amplifying the output signal of the pressure sensor 34, and the amplification circuit 35, And an A / D conversion circuit 36 that outputs to the control unit 50. In the dive computer 1, the time measuring unit 68 outputs a clock signal having a predetermined frequency and divides the clock signal from the oscillation circuit 29 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 28.

FIG. 5 is a functional block diagram of the control unit 50.
The control unit 50 functions as an ascent rate measurement unit 75 that measures the ascent rate (depth change rate) during ascent based on the pressure (water depth) measurement result of the pressure measurement unit 61 and the measurement result of the timing unit 68.
Moreover, the control part 50 is 1.5 [m] (for the diving end determination) from the timing when the pressure measured by the pressure measuring part 61 becomes deeper than 1.5 [m] (the water depth value for the diving start determination) as the water depth value. A diving result record for storing and holding the diving results (diving date, diving time, maximum water depth, etc.) in the RAM 54 as one diving period (diving operation) until the timing when it becomes less than (water depth value). It functions as the part 78. Further, the control unit 50 sets the ascending speed upper limit value (which is set in plural depending on the depth) in which the actual ascending speed is stored in advance in the ascending speed upper limit value storage unit 76 based on the measurement result of the ascending speed measuring unit 75. If it exceeds, a warning is displayed on the display unit 10, or functions as a rising speed violation warning unit 77 that warns the user that the rising speed is violated via the sound report device 37 and the vibration generator 38. .

  In the above configuration, the diving result recording unit 78 is 1.5 [m] from the timing when the water depth value corresponding to the measurement result of the pressure measuring unit 61 becomes deeper than 1.5 [m] (water depth value for diving start determination). If the diving time, which is the time until the timing when it becomes less than (the diving end determination water depth value), is less than 3 minutes, the diving performed during this time is not treated as a single dive, and the diving result during that time is not Not recorded. This is because the diving result recording unit 78 records and holds the diving results as a predetermined number (for example, 10) of log data, and when diving more than a predetermined number, the oldest data is recorded. This is because, since the configuration of deleting in order is adopted, an important dive result is deleted when a configuration of recording a short dive such as a natural dive is also recorded. In addition, the diving result recording unit 78 causes the ascending speed violation warning unit 77 to issue a rising speed violation when a plurality of warnings are issued consecutively in one dive, for example, two or more consecutive warnings. It is configured to record the fact that there was a dive, and in the log mode that reproduces the log data, when the dive result is reproduced and displayed, the reproduction that the ascent rate violation occurred during the dive, It will be displayed.

Next, the operation of the first embodiment will be described.
FIG. 6 is a processing sequence diagram of the dive computer. The processing sequence diagram of FIG. 6 is for the case where operation data is transmitted from the small dive computer 4A that is always worn by the user to the large dive computer 4B.
In this case, it is assumed that the user moves on an airplane with the dive computer 4A mounted, and the dive computer 4B is accommodated in the cargo compartment of the airplane and moved.
The dive computer 4A, which is the transmission side information processing apparatus, operates the switch B to change the operation mode to the information transfer mode (step S401).
On the other hand, also in the dive computer 4B, the operation mode is changed to the operation data reception mode by operating the switch B (step S404).
In this calculation data reception mode, transmission data from the dive computer 4A can be received at any time.
Therefore, the user operates switch B of dive computer 4A to start transmission of calculation data corresponding to safety information (step S402).
In this case, the calculation data as safety information transmitted from the dive computer 4A relates to the amount of gas accumulated in the user's body caused by an altitude change obtained by the user always wearing the dive computer 4A. It is data.

For example, in the case of transmitting calculation data corresponding to the amount of nitrogen gas in the body, all the compartments calculated by the dive computer (referred to as each part of the diver's body classified into a plurality of parts. The amount of nitrogen gas is transmitted for each of the 12 parts.
As an example, assuming that the unit is msw converted to water pressure, if the altitude rank is 0 (for example, the altitude value corresponding to the altitude is equal to or less than 800 [m]), the user has sufficiently adapted to adapt. If so, all of the calculation data corresponding to 7.9 msw are transmitted to the compartments 1 to 12.
After that, the dive computer 4A continues the calculation based on the calculation data so far (step S403).
On the other hand, the dive computer 4B receives the transmitted calculation data (step S405), and rewrites the calculation data calculated based on the data collected by itself (step S406).

Here, the calculation data is rewritten for the following reason.
Since the dive computer 4A is worn by the user, even when boarding an airplane and getting down on the ground, pressure management is performed in the cabin, so it can adapt to the state of altitude rank = 0 relatively quickly. It is possible. On the other hand, since the dive computer 4B is housed in the cargo compartment where pressure management is not performed, for example, it is determined that the altitude rank is 3 (for example, the altitude value corresponding to the altitude is equal to or higher than 6000 [m]). Therefore, it is far from the environment where the user is placed, and even if the calculation is continued in this state, a correct calculation result cannot be obtained.

Therefore, in the present embodiment, the calculation data is rewritten to that of the dive computer 4A because the environment in which the user is placed is also reproduced in the dive computer 4B.
As a result, the dive computer 4B continues the new calculation based on the calculation data rewritten by the control unit 50 (step S407). That is, the control unit 50 calculates the decompression from the water depth corresponding to the water depth data, and obtains the non-decompression diving possible time.

Here, a specific example of decompression calculation will be described.
The control unit 50 includes a respiratory nitrogen partial pressure calculation function, a respiratory nitrogen partial pressure storage function, a comparison function, a half-saturation time selection function, a body nitrogen partial pressure calculation function, a body nitrogen partial pressure storage function, and a body nitrogen partial pressure discharge time. A derivation function and a dive time derivation function are realized.
These can be realized by each component shown in FIG. 4 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 function 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, which is the measurement result of the pressure measuring unit 61.

Thus, the respiratory nitrogen partial pressure storage function stores the respiratory partial nitrogen pressure PIN2 (t) calculated by the respiratory nitrogen partial pressure calculation function.
On the other hand, the half-saturation time selection function selects the half-saturation time HT to be used when calculating the partial pressure of nitrogen in the body, and the later-described internal body for each tissue site where the absorption / extraction rate of nitrogen is different. The nitrogen partial pressure PGT (t) is calculated.
As a result, the internal nitrogen partial pressure PGT (t) calculated by the internal nitrogen partial pressure calculation function is stored by the internal nitrogen partial pressure storage function.
As a result, the comparison function compares the respiratory nitrogen partial pressure PIN2 (t) and the body nitrogen partial pressure PGT (t), and varies the half-saturation time HT based on the comparison result.
Next, a specific method for calculating the nitrogen partial pressure in the body will be described. Regarding the calculation method of the partial pressure of nitrogen in the dive computer 1 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.
Based on the water pressure P (t) output from the pressure measuring unit 61, the respiratory air nitrogen partial pressure PIN2 (t) corresponding to the air that the diver is breathing is calculated by the respiratory air nitrogen partial pressure calculation function. 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 function stores the value of the respiratory air nitrogen partial pressure PIN2 (t) calculated by the respiratory air nitrogen partial pressure calculation function as shown in equation (1).
Next, the body nitrogen partial pressure is calculated for each body tissue having a different nitrogen absorption / extraction rate by the body nitrogen partial pressure calculation function.

For example, taking one tissue as an example, the in-vivo nitrogen partial pressure PGT (tE) absorbed / extracted by the dive time t = t0 to tE is the in-body nitrogen partial pressure PGT (t0 at the start of calculation (= t0 time)). ) As follows: In addition, since it shall be staying at the same water depth during the dive time t = t0 to tE,
PIN2 (t0) = PIN2 (tE)
It becomes.
PGT (tE) = PGT (t0)
+ {PIN2 (t0) -PGT (t0)}
X {1-exp (-K (tE-t0) / HT)} (2)
The half-saturation time HT here is a process in which the body nitrogen partial pressure PGT (tE) reaches the respiratory nitrogen partial pressure PIN2 (tE) under the water depth from the body nitrogen partial pressure PGT (t0) at time t0. This is the time required to reach half of the body nitrogen partial pressure PGT (t0) and the respiratory nitrogen partial pressure PIN2 (tE).
That is, the body nitrogen partial pressure PGT (tE) is
PGT (tE) = {PGT (t0) + PIN2 (tE)} / 2
It is time to become. And this half-saturation time HT is a numerical value which changes with each structure | tissue.
As will be described later, the half-saturation time HT is variable depending on the magnitudes of PGT (t0) and PIN2 (t0). Measurement of time such as time t0 and time tE is managed by the time measuring unit 68 shown in FIG.

The body nitrogen amount calculation function repeatedly executes the calculation of the body nitrogen partial pressure PGT (t) as described above at a predetermined sampling period tE. At this time, the in-vivo nitrogen partial pressure PGT (tE) calculated for each sampling period by the equation is transferred to the in-body nitrogen discharge time deriving function and the dive possible time deriving function, and the comparison function and in-body nitrogen partial pressure discharging time deriving function Delivered as PGT (t0). This means that the PGT (tE) at the previous sampling is used as the PGT (t0) in the equation.
Prior to the above calculation, by the comparison function, the respiratory nitrogen partial pressure PIN2 (t0) stored by the respiratory nitrogen partial pressure storage function and the PGT (t0) stored by the body nitrogen partial pressure storage function are calculated. And the comparison result is passed to the half-saturation time selection function. The half-saturation time selection function stores two types of half-saturation time HT (half-saturation time HT1 and HT2 to be described later) that the body nitrogen partial pressure calculation function should use for partial pressure calculation, and according to the comparison result by the comparison function The half-saturation time HT1 or HT2 is selected and handed over to the body nitrogen partial pressure calculation function.

The body nitrogen partial pressure calculation function calculates the body nitrogen partial pressure PGT (tE) at time t = tE by the following equation using the half saturation time HT1 or HT2 selected by the half saturation time selection function.
(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.
If PGT (t0) = PIN2 (t0),
PGT (tE) = PGT (t0) (4)
It becomes.

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. Moreover, the control part 50 can grasp | ascertain the newest partial nitrogen pressure in a body about the diver who is diving by calculating the partial nitrogen pressure PGT (t) in the above.

Based on the in-vivo nitrogen partial pressure PGT (tE) obtained as described above and the respiratory air nitrogen partial pressure PIN2 (tE) at t = tE calculated by the respiratory air nitrogen partial pressure calculation function, no decompression is performed. The dive 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-body nitrogen amount calculating function is used as PGT (t0) in the formula, and the respiratory air / nitrogen content is used as PIN2 (t0). The respiratory nitrogen partial pressure PIN2 (tE) calculated by the pressure calculation function 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 dive time to be obtained.

  As described above, according to the first embodiment, the dive computer that is always worn by the user and the relatively large dive computer for backup use the same data when actually used for diving. Since various calculations including the no-decompression diving possible time can be performed using, reliability is further improved.

[2] Second Embodiment Next, the operation of the second embodiment will be described.
FIG. 7 is a processing sequence diagram of the dive computer according to the second embodiment. The processing sequence diagram of FIG. 7 is for the case where operation data is transmitted from the small dive computer 4A that is always worn by the user to the large dive computer 4B.
In this case, it is assumed that the user moves on an airplane with the dive computer 4A mounted, and the dive computer 4B is accommodated in the cargo compartment of the airplane and moved.
The dive computer 4A, which is the transmission side information processing apparatus, operates the switch B to change the operation mode to the information transfer mode (step S501).

On the other hand, also in the dive computer 4B, the operation mode is changed to the operation data reception mode by operating the switch B (step S507).
In this calculation data reception mode, transmission data from the dive computer 4A can be received at any time.
Therefore, the user operates switch B of dive computer 4A to start transmission of calculation data corresponding to safety information (step S502).
Even in this case, similarly to the first embodiment, the calculation data as safety information transmitted from the dive computer 4A is caused by a change in altitude obtained by the user always wearing the dive computer 4A. This is data relating to the amount of gas accumulated in the user's body.

Further, the dive computer 4B receives the transmitted calculation data (step S508), and in order to verify whether the received data matches the transmission data transmitted by the dive computer 4A, the dive computer 4B dive the received data (reception contents). It transmits to the computer 4A (step S509). Then, the dive computer 4B shifts to a reception standby state (step S510).
As a result, the dive computer 4A receives the received data of the dive computer 4B sent back by the dive computer 4B (step S503), compares the transmitted data transmitted in step S502 with the received data received in step S503, and matches. It is determined whether or not (step S504).
If it is determined in step S504 that the transmission data transmitted in step S502 and the reception data received in step S503 do not match (step S504; No), the process proceeds to step S502 again, and data is retransmitted. I do.

If it is determined in step S504 that the transmission data transmitted in step S502 matches the reception data received in step S503 (step S504; Yes), the dive computer 4A indicates that both data match. , In this embodiment, “OK” data is transmitted to the dive computer 4B (step S505). After that, the dive computer 4A continues the new calculation based on the various data acquired by itself (step S506).
The dive computer 4B in the reception standby state determines whether or not the “OK” data described above has been received within a predetermined time after entering the reception standby state (step S511).
In the determination in step S511, if the above-mentioned “OK” data is not received within a predetermined time after entering the reception standby state (step S511; No), it is assumed that there is an error in the data received in step S508. Then, the process proceeds to S508 again, and calculation data from the dive computer 4A is received.

If it is determined in step S511 that the “OK” data described above has been received within a predetermined time after entering the reception standby state, the dive computer 4B determines that the operation data received in step S508 is the data collected by itself. The calculation data calculated based on this is rewritten (step S512). Here, the reason why the calculation data is rewritten is the same reason as in the first embodiment.
As a result, the dive computer 4B continues the new calculation based on the calculation data rewritten by the control unit 50 (step S513). That is, the control unit 50 calculates the decompression from the water depth corresponding to the water depth data, and obtains the non-decompression diving possible time.
As described above, according to the second embodiment, the dive computer that is always worn by the user and the relatively large dive computer for backup use the same data when actually used for diving. This makes it possible to perform various calculations including the no-decompression dive time, thus improving reliability and ensuring that the biometric information held by both dive computers is the same, further improving reliability. I can plan.

In the above description of the second embodiment, the received data is sent back as it is in step S509. However, an error check code such as a parity bit is added to the transmission data in advance, or a checksum method or CRC (Cyclic Redundancy Code) is used. It is also possible to configure the receiving side dive computer (dive computer 4B in the present embodiment) to request retransmission of data that is considered to have an error by using an error detection method such as a).
In the description of each of the embodiments described above, wireless communication is performed for transmission / reception of calculation data. However, it is also possible to configure to perform wired communication.
In the above description, the case where the control program for controlling the dive computer is stored in the ROM in advance has been described. However, the control program is recorded in advance on a recording medium such as various magnetic disks, optical disks, and memory cards, It is also possible to read and install from these recording media. 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.

  In the above description, the case where the dive computer is an arm-mounted type has been described. However, the present invention is not limited to this.

It is a use mode figure of diving equipment in the case of using the information processing apparatus for divers of an embodiment. It is an external appearance front view of the small dive computer of an embodiment. It is an external appearance front view of the large sized dive computer of an embodiment. It is a general | schematic block diagram of a dive computer. It is a functional block diagram of a control part. It is a processing sequence figure of the dive computer of a 1st embodiment. It is a processing sequence figure of the dive computer of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Dive computer, 15 ... Operation part, 10 ... Display part, 11 ... Liquid crystal display panel, 12 ... Liquid crystal driver, 27 ... Calculation data receiving part, 28 ... Calculation data transmission part, 30 ... Diving operation monitoring switch, 37 ... Information Sound device 38 ... Vibration generating device 41 ... Pressure sensor 42 ... Amplifying circuit 43 ... A / D conversion circuit 44 ... Controller 45 ... Timing circuit 46 ... Ultrasonic transmitter 47 ... Ultrasonic receiver 48 ... Demodulation circuit, 50 ... Control unit, 61 ... Pressure measurement unit, 68 ... Timekeeping unit.

Claims (7)

A biological information measuring unit for measuring the biological information of the user;
An information receiving unit that receives external biometric information data that is measured and stored by the external information processing device from an external information processing device;
A biological information storage unit that stores the measured biological information as biological information data, and stores the external biological information data ;
A safety information presenting unit that generates and presents safety information that is information for ensuring the safety of the diver for a diver who is a user based on the biometric information data and the external biometric information data ;
An information processing apparatus for divers, comprising: The information processing apparatus for divers according to claim 1,
When receiving the external biometric information, the biometric information data stored in the biometric information storage unit includes an information update unit that replaces a portion corresponding to the external biometric information with the received external biometric information. Divers information processing apparatus characterized by the above. The information processing apparatus for divers according to claim 2,
The information updating unit performs the replacement after confirming that the external biometric information data transmitted by the external information processing apparatus matches the external biometric information data actually received. Divers information processing equipment. A biological information measurement process for measuring the biological information of the user;
An information receiving process of receiving external biometric information, which is biometric information measured and stored by the external information processing apparatus, from an external information processing apparatus;
Storing the measured biological information, and storing the external biological information;
A safety information presentation process for generating and presenting safety information, which is information for ensuring the safety of the diver, for a diver who is a user at the time of diving based on the biological information and the external biological information,
A method for controlling an information processing apparatus for divers, comprising: In a control program for controlling an information processing apparatus for divers by a computer,
Measure the user's biological information,
The external information processing device measures and stores external biometric information that is stored and stored from the external information processing device,
Storing the measured biological information and storing the external biological information;
Based on the biometric information and the external biometric information, a diver who is a user at the time of diving generates and presents safety information that is information for ensuring the safety of the diver.
A control program characterized by that. The control program according to claim 5, wherein
When the external biometric information is received, of the stored biometric information, a portion corresponding to the external biometric information is replaced with the received external biometric information.
A control program characterized by that. The control program according to claim 6,
A control program for performing the replacement after confirming that the external biometric information transmitted by the external information processing apparatus matches the external biometric information actually received .

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