JPH0254196A - Diver's watch - Google Patents

Abstract

PURPOSE:To avoid the danger of caisson disease of a diver by indicating a no-pressure-reduction dive possible time at each dive water depth while showing a pressure reduction instruction according to a pressure reduction table in the case where dive is performed in excess of the no-pressure-reduction possible time. CONSTITUTION:A CPU measures a dive time 14 and a rest time 15 on the water surface on the basis of the output of a diaphragm semiconductor pressure sensor 11. At the dive of first time, a no-pressure-reduction possible time in accordance with respective water depths is searched to indicate in an LCD 16 according to a pressure reduction table stored in a ROM of the CPU. In the case where repeating dive is performed on and after the second time, the remaining nitrogen is calculated from each data of maximum water depth, dividing time and rest time on the water surface at the prior dive to find a no-pressure-reduction dive possible time at next dive and the calculated time is indicated 16. In the case where dive is performed in excess of the no-pressure- reduction time, necessary pressure reduction depth and pressure reduction stop time is searched to indicate 16 this. A diver can prevent caisson disease if he manages pressure reduction according to the indication.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a diver's watch having water depth measuring means.

[Prior art] A conventional diver's watch is disclosed in Japanese Patent Application Laid-Open No. 62-21031.
As described in , a semiconductor pressure sensor unit is built into the watch case to measure water depth and diving time, and this is displayed within the watch to allow Goober to understand the diving situation and ensure safe diving. It was designed to allow diving.

[Problems to be Solved by the Invention] However, although the above-mentioned conventional technology can measure water depth and diving time, this alone poses a risk of water leak disease.

Since human ancestors were born on earth approximately 1.5 million years ago, humans have adapted physiologically and lived without any functional problems by living in a world with an atmospheric pressure of 1 atmosphere. However, when climbing mountains or flying in an airplane, the atmospheric pressure drops, which can lead to various disorders, and these main medical conditions are thought to be caused by decompression.Furthermore, diving If the decompression is too rapid during surfacing after performing this procedure, there is a risk of a disease called diving disease. It can be said that it is a disease that develops as a result of the imbalance between pressure and pressure.

Therefore, the purpose of the present invention is to eliminate the risk of such diving diseases and to perform safe diving.The purpose of this invention is to shorten the possible diving time (including reflex diving) within the no-decompression range. This will notify the diver and eliminate the danger of diving disease, and if the diver dives beyond the possible diving time within the no-decompression range, a decompression instruction will be given based on the decompression table and the diver will be informed. This is to protect against the danger of water sickness.

[Means for Solving the Problems 1] The diver's watch of the present invention displays the possible no-decompression diving time at each diving depth, and when diving exceeds the possible no-decompression diving time, the diver's watch of the present invention displays ( It is characterized by issuing a pressure reduction instruction.

[Function] According to the configuration of the present invention, the possible no-decompression diving time during the first dive is 1, as shown in FIG.
The initial value of the decompression table storage means 6 is displayed on the display means 4, and the possible non-decompression diving time from the second time onwards is displayed on the depth measuring means t.
The calculating means 7 corrects the values in the pressure reduction table based on the previous data from the in-water time measuring means 2 and the water surface rest time measuring means 3, and displays them on the display means 4. In addition, if you dive beyond the no-decompression diving time, the decompression table storage means 6 will display
The decompression tTffi means 8 searches for the decompression stop depth and decompression stop time and displays them on the display means 4.

[Embodiment] FIG. 2 is a block diagram of a diver's watch showing an embodiment of the present invention.

In the present invention, as shown in FIG. 2, as a water depth measuring means,
A diaphragm type semiconductor pressure sensor 11 is used, and this output signal is converted into a digital value through an A/D converter 12, passed through a CPU 13, and displayed on an LCD 14 or the like.

Further, based on the output from the diaphragm type semiconductor pressure sensor 11, the CPU 13 measures the diving time if the water depth is being measured, and the water surface rest time if there is no swerving, and displays the result as 1.

Next, when displaying the available no-decompression diving time, first search for the available no-decompression diving time according to each water depth from the decompression table stored in the ROM in the CPU 13 or the external ROM. For repeated dives from the second time onward, the amount of residual nitrogen is calculated from the maximum water depth (or water depth), dive time, and surface rest time data of the previous dive, and the amount of residual nitrogen is calculated for the next dive without decompression. Find the possible time and display it on the LCD l4 etc. to alert the dialer.

However, if the Diper dives beyond the above-mentioned no-decompression diving time, there is a risk of diving disease if it floats up or rises, so depending on the diving situation, the R
From the pressure reduction table stored in OM or external ROM,
Search for the required decompression stop depth and decompression stop time,
By displaying this, the diver can manage decompression and prevent diving sickness. Also, just by displaying,
If it is insufficient to notify the dialer, an alarm l5. We are making effective use of these tools to ensure safer diving.

Next, the specifications will be explained with reference to the flowchart shown in FIG. 3 showing the present invention.

First, it detects whether the diver's watch is in diving mode. (31) If it is in another mode, different processing will be performed for each mode, but if it is in diving mode, the sensor will be energized, the water depth value will be reset to 0, pressure will be applied to the sensor, and the output will be output. Find out. (32) If there is an output from the sensor, it is determined that you are underwater, and it is checked whether it is a continuous dive (33). If it is the first dive, the output from the sensor is displayed as a water depth value. , Measure the diving time, calculate and display the possible no-decompression diving time from the maximum water depth value, (34, 35, 3
6).

If it is not the first dive but a continuous dive, the maximum depth value, dive time, and surface pause time from the previous dive are used to calculate and display the possible no-decompression diving time, as well as the depth value, ilJ water hour opening time display (37.3
8.39).

Next, compare whether the dive time exceeds the possible no-decompression diving time (42), and if it exceeds, display the decompression stop depth and decompression stop time, and wait until the decompression ends. Turn this around (43, 44).

In step 32, there is no output from the sensor,
If it is determined that you are on land, check whether it is suspended on the surface of the water ↓j
[Decline. In this case, if it is after diving, it is assumed that the surface pause is occurring (40), and the surface pause time is measured and displayed (
41).

Through the above processing steps, it becomes possible to display the no-decompression diving time and decompression management on the diver's watch.

[Effects of the Invention] As described above, the present invention automatically determines the possible no-decompression diving time based on the maximum water depth of 7'J (or water depth), diving time, and surface pause time in the previous dive. Because it calculates the parts that previously required the diver to rely on past experience and intuition, and every two dives,
Check the decompression table and calculate the possible no-decompression diving time.
With this in mind, I no longer go diving,
There is no longer any need to forget the no-decompression diving time during a dive, panic underwater, and review the dive table.
Safe diving becomes possible.

In addition, if the diver dives beyond the maximum no-decompression diving time, the decompression stop depth and decompression stop time should be displayed to encourage the diver to manage the decompression in order to prevent diving sickness. This makes it a diver's watch that takes into account not only the safety of sports divers, but also the safety of working divers.

The decompression table, which is the basis for decompression management, has different values depending on the country, so the contents of the decompression table must be changed depending on the country in which it is used.

Please note that the decompression table is just a standard value, so if you are overweight or have slightly less physical strength, such as a woman, you may want to take your own physical strength into account and use the values on the decompression table to be on the safe side. It is also effective to have functions that allow you to adjust the calculation results to suit your physical condition and move them around on the dive table.

Noh] 6...Decompression table storage means 7... No-decompression water discharge possible time calculation means 8... Decompression management means that's all

[Brief explanation of the drawing]

FIG. 1 is a diagram corresponding to claims of a diver's watch showing one embodiment of the present invention. FIG. 2 is a block diagram of the diver's watch of the present invention. FIG. 3 is a flowchart showing the operation of the diver's watch of the present invention. Applicant: Seiko Epson Co., Ltd. Agent, Patent Attorney 1 (Masayoshi Usa (1st name)) Depth measuring means Diving time measuring means Surface rest time measuring means Display means Control means (diving and clock machine)

Claims (1)

[Claims] In a diver's watch that has a water depth measuring means and a memory means for storing a decompression table, the possible no-decompression diving time is calculated based on data from the measuring means for measuring diving time, the measuring means for measuring surface rest time, and the water depth measuring means. A diver's watch, characterized in that it is equipped with a calculation means for calculating, a decompression management means for instructing decompression when diving exceeds the allowable no-decompression diving time, and a display means for displaying each of the above data simultaneously or in a switched manner.