JP3106317B2 - Diving information management device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention monitors the working environment of a diving worker and the pressure in an air cylinder, performs various displays and alarms, and records the working environment. The present invention relates to a type information management device.

(Prior Art) Conventionally, this type of device has used two types of devices, a device for managing information such as a no-decompression limit time, a decompression water depth, and a decompression time, and a device for displaying the air pressure in a cylinder.

In addition, there is a device that incorporates the above two functions into one casing. However, a high-pressure hose is used between the cylinder connection part and the information display part, and the high pressure is transmitted to the information display part. Although various data could be displayed, various data could not be recorded.

(Problems to be Solved by the Invention) Due to the structure of the conventional device, the high-pressure hose is easily caught in a reef, a hull, or the like by a wave or a tidal current during a dive work, and is easily displayed. When the part is hooked on a reef or the like, a large stress is suddenly applied to the joint between the bose and the cylinder. Pressure fatigue caused by the application of cylinder air pressure is superimposed on the damage and strain generated due to these, and cracks and ruptures occur frequently. The air pressure inside this cylinder is
Since the pressure is 200 kg / cm ² or more, when the high-pressure hose ruptures, it is extremely dangerous, and there is a problem that the life of a diver is affected in water.

In addition, warning display is performed by two kinds of hearing and sight,
Even if the alarm is detected by hearing, when confirming the content of the alarm by visual display, it is performed either by blinking the LCD or turning on the LED only, so the LED in the water with relatively high brightness
The display is difficult to confirm due to a decrease in contrast due to extraneous light. Further, the LCD display in dark water at night or the like has a disadvantage that a light source is required for confirmation, and it is difficult to confirm the contents of the alarm smoothly.

Also, when a diving disorder was caused, the process was only a diver's memory, so there were many vague points, and it was not possible not only to take appropriate measures but also to investigate the cause of the accident.

(Means for Solving the Problems) In order to solve these drawbacks, the present invention provides an information management device for diving work. (1) Divers according to the diving process in the past, the current water depth, and the dive time up to the present (2) Means for recording the working environment data and air pressure data in the cylinder by means of an electric cable from the cylinder joint to the information display part, (3) When issuing a warning alarm Means for generating two or more kinds of outputs in a complementary manner, and for transmitting the recording data to an external general-purpose computer wirelessly using an optical communication system by using a light emitting means. An object of the present invention is to provide a portable information management device for improving security. Hereinafter, embodiments will be described in detail with reference to the drawings.

(Embodiment) FIG. 1 shows an embodiment of the present invention, wherein 1 is a cylinder connecting portion, 101 is a pressure sensor for measuring air pressure in the cylinder, 3 is an information display portion,
2 is an electric cable having a flexible and tough structure,
The connection between the cylinder coupling part (1) and the information display part (3) is made. 301 is a pressure sensor for measuring water depth, 302 is a pressure sensor interface circuit, 303 is a temperature sensor for measuring water temperature, 304
Is a temperature sensor interface circuit, 305 is a set switch, 306 is an event switch, 307 is a foot / meter selection strap for selecting a unit system, 310 is a one-chip microcomputer, 311 A / D converter, 312 PRO
M, 313 PRAM, 314 CPU, 315 input port, 316 timer counter, 317 input / output port, 318 output port, 320 is external data RAM, 330 is LCD display, 340 is alarm A ceramic buzzer 350 is a data output and alarm LED. In FIG. 2, reference numeral 330 denotes an LCD display unit, and reference numerals 331 to 339 denote display contents.

The operation of this device is performed by a one-chip microcomputer (31
0) is controlled by a program stored in the PROM (312). The description will be made in the following order.

(B) When waiting for operation on land, the timer counter (316)
The other circuits of the one-chip microcomputer (310), the water depth measurement pressure sensor (301), and the pressure sensor interface circuit (30)
2) intermittently drive to monitor the pressure applied to the pressure sensor (301) and input the information of the set switch (305).

When the water pressure ON is detected via the pressure sensor (301), the state automatically shifts from the operation standby state to the non-decompression diving measurement state. Water pressure ON is not detected via the pressure sensor (301),
When the CPU (314) detects the ON information of the set switch (305) via the input port (315), it enters a diving standby state.

(B) In the dive standby state, the unit system is determined by inputting the state of the foot / meter selection strap (307) via the input port (315). The following description is based on the assumption that the metric system has been selected. (331) of the LCD display (330) is "DEPTH",
0m blinks and drives the temperature sensor (303) and the temperature sensor interface circuit (304), and displays the current temperature (33
Display in 6). The A / D converter (31) drives the pressure sensor (101) and the pressure sensor interface circuit (302).
1) Display the air cylinder internal pressure value input via (339) as “AIR” and the unit as “bar”.

In this state, when the water pressure ON is detected via the pressure sensor (301), the state automatically shifts to the non-decompression diving measurement state. When the CPU (314) detects the ON information of the event switch (306) via the input port (315), it enters the previous dive data display state, and when it detects the ON information of the set switch (305), it enters the dive plan display state.

(C) In the previous dive data display state, the external data RAM (3
The dive data recorded in (20) is searched, and the past data is searched from the latest data every time the event switch (306) is turned on, and (33) of the LCD display (330) is searched.
1) Set “MAXDEPTH” to the maximum water depth and (333) to “DAT
The dive month and day are displayed as "E", the dive time is displayed as (DIVE) in (335), the water temperature at the maximum depth value is displayed in (336), and the dive start time is displayed as (ENTER) in (339). In this way, the past diving history is easily understood.

(D) When entering the no-decompression diving measurement state, the year, month, day, and time data that transits to this state are recorded in the external data RAM (320), and the pressure sensor interface circuit ( 302), pressurized through A / D converter (311) and display the maximum water depth within a certain sampling period on LCD
"DEPTH" is displayed on (331) of the display section (330).

The current absolute pressure Pa is obtained based on the obtained water depth value, and the following equation (1) is calculated from this Pa to obtain the partial pressure value P of air or inert gas in each half-saturation time tissue.

P = P _i + (P _a −P _i ) (1−e ^{ln0.5 × (t / HT)} )
_[ATM] ... (1) where P _i is air or an inert gas partial pressure value each half saturation time tissue is already accepted.

HT is the half-saturation time of each half-saturation time tissue, and t is a fixed sampling period.

The obtained maximum water depth D within a certain sampling period and the air or inert gas partial pressure value P at each saturation time tissue previously obtained.
From Equation (2), the no-decompression limit time t _LIM at the current water depth is obtained.

Here, M ₀ is a partial pressure value of the non-decompression limit air or the inert gas in each half-saturation time tissue. For all the half-saturation time tissues, calculate t _LIM of equation (2), set the minimum time as the no-decompression limit time, turn on LIMIT (332) on the LCD display (330), and display the no-decompression limit time. I do. The water temperature obtained from the output of the temperature sensor (303) is shown in (336) of the LCD display (330), and the air pressure in the cylinder obtained from the pressure sensor (101) is shown in (339).
Then, the dive time from the time when the water pressure ON is detected to the present is displayed in (335). This operation is repeated at a fixed sampling cycle, and the display data is updated successively.
Record at (320). This recording is continued until the water pressure OFF is detected.

(E) When the decompression diving limit is exceeded, the decompression diving measurement state is entered. In this state, the CPU (314) sends the output port (31
8) intermittently sound the ceramic buzzer (340) via
In addition, the data output and warning LED (350) flashes at a slow cycle to notify the diver that the no-decompression limit has been exceeded.

Generally partial pressure value P of each half saturation time tissue in air or an inert gas, safely flying possible depth Dc, between the partial pressure value M ₀ when being securely stay on the water, P = M ₀ It is known that there is a relationship of + a × Dc / 10 (3). (3) By transforming the equation Here, a is a constant in each half-saturation time structure. This equation (4) is calculated for all the half-saturation time tissues in the decompression diving state, and the deepest water depth value among them is the water depth that can safely float.

By normalizing the safe ascending water depth to 3m slap, the optimum decompression stop water depth can be obtained. In normalization, it is a condition that the normalized decompression water depth is deeper than a safe floating depth before normalization.

Let Ds be the optimal decompression stop water depth obtained in this way.
In order to determine the decompression stop time at Ds, it is necessary to know to what value the partial pressure of air or inert gas in the tissue must be depressurized. From the equation (3), the partial pressure value P _D of air or inert gas that can float to the next decompression stop water depth Ds-3 [m] is P _D = M ₀ + (a × (Ds−3) / 10) (5) It can be obtained by calculating this equation.

From the obtained P _D and the current half-saturation time partial pressure value P of the air or inert gas in the tissue, the decompression stop time t _{s at the} optimum depressurized water depth Ds can be obtained by the following equation (6).

Equation (6) is calculated for all the half-saturation time tissues that require decompression, and the maximum value of the decompression stop time t _s is the decompression stop time. The optimum decompression stop water depth and decompression stop time obtained in this way are displayed on the LCD display (330) at (333) as “DEC”.
Tell diver by displaying the Ps [m] t _s as.

These calculations are repeatedly updated successively at a constant sampling cycle of the decompression diving.

(F) During the decompression stop, compare the current water depth with the safe ascending depth, and if the diver ascends to a depth shallower than the safe ascent, turn on the ceramic buzzer (340) continuously. In addition to sounding, the data output and alarm LEDs blink at a high speed, and the LCD display (33
By blinking (333) of (0), the diver is notified that the decompression stop is abnormal.

Further, when the vacuum partial pressure value of at the air or inert gas slowly to half saturation time tissue gentle flying speed becomes less than M ₀ becomes unnecessary, and when the decompression stop is finished, The display on the LCD display unit (330) is returned to the no-decompression diving measurement state, each alarm is released, and the (no) non-decompression diving measurement processing is performed.

(G) During dive work, always monitor the descent and ascent speed. If you are descending at a speed of 22.5m or more per minute or ascending at a speed of 10m or more per minute, use a ceramic buzzer. (34
0) continuous sound, data output and warning LED blinking at high speed, and furthermore, blinking (334) "SLOWLY" on the LCD display (330) tells the diver that the descent and ascent speed is too fast. Notify and reduce speed.

(4) During diving work, the air pressure in the cylinder input via the pressure sensor (101), electric cable (2), pressure sensor interface circuit (302), and A / D converter (311) 50k
When g / cm ² or less, the CPU (314) intermittently sounds the ceramic buzzer (340) via the output port (318), and outputs data and an alarm LED (350), and furthermore, an LCD display (330). (339) blinks the air pressure value in the cylinder to notify the diver that the residual air pressure in the cylinder has decreased.

Performing the visual display of the alarm by two means, the blinking of the LCD and the blinking of the LED, is very effective when assuming any environment.

In other words, the LED alarm is enabled in dark water, and the contrast of LED is reduced by extraneous light in bright water, but the contrast of blinking of the other LCD is increased. An appropriate alarm display corresponding to the change can be obtained.

(I) When the water pressure OFF is detected by the pressure sensor (301), a water surface rest state is set.

At the water surface, the partial pressure of the air or inert gas in the tissue decreases for a half-saturation time. With the decrease in the partial pressure value, the partial pressure value of the air or the inert gas is calculated using the equation (1) at a constant sampling cycle. When the cylinder air pressure applied to the pressure sensor (101) is released, (339) of the LCD display (330) is displayed as "REAL" to indicate the current time, and (335) is displayed as "INTR". Displays the surface rest time from the ascent time.

In addition, special caution is required when boarding an airplane after performing diving work because the air pressure inside the airplane will decrease. Since the air pressure in the airplane there are things to be lower to the extent 0.8 [ATM], 0.8 and [ATM] even Tomareru secure the partial pressure value of each half-saturation time organization and P _F, time until the possible airplane boarding t _F can be obtained by the following equation (7).

Where P is the air or inert gas pressure in the current half-saturation time tissue. HT is the half-saturation time.

The obtained time t _F until the airplane can be boarded is displayed as “FLY NG” on (333) of the LCD display unit (330). This calculation is performed at a constant sampling cycle and the display is updated until the partial pressure value of the air or the inert gas of the tissue becomes a constant partial pressure value at 1 [ATM]. When the air or inert gas partial pressure value of the tissue for the half-saturation time reaches the constant partial pressure value of 1 [ATM], the operation automatically shifts to the operation standby state shown in (a). When the water pressure ON is detected via the pressure sensor (301) during the water surface rest state, the state automatically shifts to the non-decompression diving measurement state (d) and the above operation is repeated. Further, when the ON information of the event switch (306) is detected, the state transits to the previous dive data display state of (c), and the set switch (30)
When the ON information of 5) is submitted, the display transits to the diving plan display state.

(V) When the dive plan display mode is entered, the no-decompression limit time at the planned water depth is calculated based on the current air or inert gas partial pressure value of each half-saturation time tissue.

Assuming that the planned water depth is D _P , the no-decompression limit time t _{P at} the water depth D _P [m] is It can be obtained by calculating equation (8). t _P is calculated for each half-saturation time tissue, and the minimum time is defined as the no-decompression limit time, and (331) of the LCD display (330) is set to “DEPTH”, D _P [m] is set, and “LIMIT” of (332) is set. Turn it on, (333)
The no-decompression limit time is displayed, and “PLAN” of (338) is displayed as ON.

D _P is the initial value is set to 9.0 [m], added increment of +3.0 [m] each time pushed the set switch, to calculate and display (8).

With this function, the diver can know the no-decompression limit time of the planned water depth at the present time on land, and can easily make a dive plan.

(L) On the water surface, by simultaneously turning on the set switch (305) and the event switch (306), the data recorded in the external data RAM (320) can be output to the output port (31).
8) Output to the data output and alarm LED (350) via.

The format of data to be output is start-stop synchronization type, 1 bit for start bit and 2 bits for stop bit. The output data includes the dive date, dive start time, ascent time, and the surface rest time from the previous dive time to the start of diving, and then water depth data and water temperature data recorded at fixed sampling intervals, and the air pressure in the cylinder. Output value data.

This output optical signal data is transmitted to a light receiving element and a simple RS-
It can be converted to an electrical signal by a 232C signal conversion circuit and transmitted to a general-purpose personal computer.

(ヲ) The A / D converter (311) constantly monitors the self-power supply voltage, and when the battery voltage drops, it informs the diver that the battery replacement time has arrived. Turn on the display of "LOW BATT".

The timer counter (316) creates the timing and clock functions required for program control.
(313) is used as a data work area during programming control, and the input / output port (317) is used to transfer data to the external data RAM (320) and the LCD display (330). .

In the present embodiment, the partial pressure value of the air or the inert gas is calculated based on the atmospheric pressure. However, the absolute water depth may be evaluated based on the absolute water depth of 10 m.

The ceramic buzzer (340) may be provided on the back of the information display unit (3) attached to the wrist to stimulate the skin.

(Effect of the Invention) By controlling the structure and software as described above, the high pressure hose is not used, so that cracks and rupture accidents of the high pressure hose, which have frequently occurred in the past, can be eliminated, and the diving work environment changes. This has the advantage that the safety of the diver can be significantly improved by providing a plurality of complements in each alarm function. In addition, there is an advantage that the use of environmental data and air pressure data in the cylinder recorded at the time of the occurrence of an accident helps the investigation of the cause of the accident.

[Brief description of the drawings]

FIG. 1 is a configuration diagram in an embodiment of the present invention, and FIG. 2 is a schematic diagram of a display unit in the embodiment. DESCRIPTION OF SYMBOLS 1 ... cylinder connection part, 101 ... pressure sensor, 2 ... electric cable, 3 ... information display part, 301 ... pressure sensor, 302
…… Pressure sensor interface circuit, 303 …… Temperature sensor, 304 …… Temperature sensor interface circuit, 305 …… Set switch, 306 …… Event switch, 307 …… Feet / meter selection strap, 310 …… 1 chip microcomputer, 311 …… A / D converter, 312 …… PRO
M, 313… PRAM, 314… CPU, 315… Input port, 316
…… Timer counter, 317… I / O port, 318… Output port, 320 …… External data RAM, 330 …… LCD display,
340: Ceramic buzzer, 350: LED for data output and alarm.

Claims (2)

(57) [Claims] 1. A dive work information management device for monitoring the pressure and working environment in an air cylinder, wherein: (a) the current depth of each half-saturated tissue of the human body based on the maximum water depth during a fixed sampling period; Means for calculating the partial pressure value of air or inert gas of the present invention, and (b) the present water depth and the current partial pressure value of air or inert gas in the half-saturation time organization of the above item (a). Means for sequentially updating and displaying the no-decompression limit time at the water depth; and (c) when the no-decompression limit time in the above item (b) is exceeded, detecting that the state has shifted to the decompression diving state, and paying attention to the diver. Means for prompting: (d) at the time of decompression diving, evaluate the partial pressure value of air or inert gas in each half-saturation time organization of the above item (a), and successively determine the optimum floating depth, decompression stop water depth and decompression stop time Means to calculate and display; Means for monitoring the depth and the partial pressure value of air or inert gas in each half-saturation time tissue of the above item (a), and alerting the diver when an abnormality is detected; (f) water depth value during descent or ascent Means for monitoring the speed of change and alerting the diver when the speed is determined to be excessive; (g) means for alerting the diver when the air pressure in the cylinder falls below a pressure set value; A dive work information management device, comprising: means for recording environmental data and air pressure value in a cylinder in a recording cycle; and means for transmitting the contents of diving work trace records to an external general-purpose computer. 2. An alarm means for a diver in the above items (e), (f), and (g), which corresponds to an alarm mode and is complementarily performed by a plurality of types of visible or audible elements. The information management device for diving work described in (1).