JPH0550688B2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to an electronic depth gauge.

[Background of the invention]

In general, decompression sickness for divers is not a problem when diving to a depth of less than 10 meters, but when the depth exceeds 12 meters, Daver recommends following a decompression chart to return to atmospheric pressure. For example, the U.S. Navy's standard decompression table is currently widely used, and the water depth is 36 m.
(120 feet) and dwell time (the time from the time the diver starts going under the water to when he or she starts to ascend to the surface) is 50 minutes, the diver must first ascend to the decompression point at 6 m (20 feet). It will remain at that depth for 15 minutes, then rise to the next 3m (10 feet) decompression point, and remain at that depth for 31 minutes before surfacing.

In such a case, the diver uses an electronic wristwatch with a stopwatch and memorizes the contents of the decompression table or records them in a notebook or the like before diving, and then starts diving. When the decompression point on the decompression table is reached, the stopwatch starts clocking, the decompression time corresponding to that decompression point is measured, and as the decompression time elapses, the robot ascends to the next decompression point. I have to.

However, as mentioned above, relying on people's memories or records in notebooks is prone to errors, and measuring decompression time with a stopwatch requires frequent switch operations. Especially when there are many depressurization points, the switch operation becomes troublesome.

[Purpose of the invention]

This invention was made against the background of the above-mentioned circumstances, and its purpose is to provide an electronic depth gauge that allows divers to easily and reliably manage their time according to a decompression table. .

[Key points of the invention]

In order to achieve the above-mentioned object, this invention
When the switch is operated, the decompression data in the decompression data storage means is selected and specified according to the measured water depth and diving time, and when the selected decompression depth is reached, a notification is given, and from this arrival, the selected decompression time is specified. After , it is determined whether or not there is next decompression data, and if there is next decompression data, the next decompression data is selected and specified, and based on the next decompression data,
The gist of this system is that the detection of reaching the decompression water depth, the notification, the detection of elapsed decompression time, and the determination of the presence or absence of the next decompression data are repeatedly performed.

〔Example〕

Hereinafter, the present invention will be specifically described based on an embodiment shown in the drawings. FIG. 1 is a block circuit diagram of an electronic wristwatch with a depth gauge equipped with an electronic depth gauge of the present invention, and the ROM (read-on memory) 1 is
Stores microprograms that control all operations of this electronic wristwatch, and microinstructions OP, AD,
Outputs DA and NA in parallel. The microinstruction OP is applied to the operation decoder, and the operation decoder outputs various control signals bu, a, b, c, d, etc. in response. In addition, the microinstruction AD is applied to RAM (random access memory) 3 and ROM4 as address data, and the microinstruction DA
is applied to the calculation unit 5 as data. Furthermore, the microinstruction NA is applied to the address section 6 as the next address data of ROM1, and in response, the address section 6 outputs address data for reading the microinstruction necessary for the next process from ROM1 and supplies it to ROM1. do.

RAM3 has various registers that will be described later.
It is used in various processes such as time measurement processing and water depth function processing performed by the calculation unit 5, and executes data writing and reading operations. Also, ROM4 is
As will be described later, the contents of the decompression table are stored as data for each bottom depth (deepest depth during diving). Therefore, RAM3 and ROM
The data read from 4 is supplied to a calculation section 5. The calculation unit 5 is also supplied with water depth data detected by the pressure sensor 7 or input data output from the switch input unit 8 corresponding to the operation switch, and the calculation unit 5 performs the various calculations described above. The result data is supplied to the RAM 3 and the display unit 9. Note that the control signals a, b, c,
d, the corresponding display section 9, calculation section 5, and switch input section 8 are applied to the pressure sensor 7 to control its operation.

The oscillation circuit 10 constantly oscillates a reference clock signal of, for example, 32.768 Hz, and supplies it to the frequency dividing circuit 11.
Then, a 16 Hz signal is output from the frequency dividing circuit 11 and given to the address section 6. Accordingly, the time measurement process is executed once every 1/46 seconds. Further, the frequency dividing circuit 11 outputs a predetermined frequency signal to the operation decoder 2,
The control signal bu output from the operation decoder 2 is given to the buzzer drive circuit 12,
An alarm sound is generated from the buzzer 13.

The RAM 3 is configured as shown in FIG.
That is, RAM3 has T, ST, TM, M,
It is equipped with N, Y, PS registers, etc. Here, the T register stores time data obtained from timekeeping processing, the ST register stores time data from stopwatch processing, and the TM register stores time data from timer processing.
In this embodiment, the timekeeping operation of the stopwatch process is automatically started when diving starts, and automatically stopped when the diver ascends to the water surface. The timer process is a subtraction tire that subtracts preset time data (decompression time in the decompression table) one second at a time. On the other hand, M
The registers store mode designation data for the basic watch mode and diving mode, and the N register is a register that stores various mode designation data for underwater depth function processing. Further, the Y register stores the depth corresponding to the decompression point in the decompression table, and the PS register stores the preset depth (planned bottom depth) that is preset before the start of diving.

The ROM 4 is configured as shown in FIGS. 3 and 4. In other words, ROM4 has a decompression table for 20 feet of bottom depth, a decompression table for 40 feet...
A 120-foot decompression table is memorized. In addition,
The decompression table used here is the standard decompression table of U.S. Shipping. For example, the 120-foot decompression table is based on the bottom dwell time (in minutes) and the decompression point (in feet), as shown in Figure 4. The decompression time (in minutes) is stored. That is, for a bottom residence time of 15 minutes, 10 feet of the first vacuum point indicates "0 minutes," in other words, infinite pressure, and for a bottom residence time of 20 minutes, the pressure will be "2 minutes" at 10 feet of the first vacuum point. Indicates that depressurization is required. It should be noted that as the bottom residence time increases, the number of pressure reduction points increases accordingly, and from 480 minutes onwards, pressure must be reduced from the seventh pressure reduction point 70 feet.

Next, the operation of the above embodiment will be explained with reference to FIGS. 5 to 7. First, an overview of the overall operation will be explained with reference to the general flow shown in FIG. This general flow is executed every time a 16 Hz signal is output from the frequency dividing circuit 11, that is, every 1/16 second. First, in step _S1 , a time measurement process is executed, and the calculation unit 6 calculates the current time data by performing a predetermined calculation on the previous data in the T register of the RAM 3, and then calculates the calculated time. Data is written to the T register in RAM3.

Next, proceed to step _S2 , and as a result of the time measurement process,
The presence or absence of second carry is checked, and if there is second carry, a process for determining whether the stopwatch is counting (step S ₃ ) or the timer is counting (step S ₅ ) is executed. As a result, if the stopwatch is in progress, stopwatch processing (step
S ₄ ) is executed and the data in the ST register of RAM3 is added for 1 second. Also, if the timer is counting, timer processing (step _S6 ) is executed,
The data in the TM register in RAM3 is added for 1 second.

If there is no second carry, the process proceeds to step _S7 , and a process for determining whether the basic watch mode is the diving mode is executed based on the data in the M register of the RAM 3. Here, it is found that if the data in the M register is "0", the basic clock mode is set, and if it is "1", the diving mode is set. Therefore, when the mode changeover switch (see Fig. 7a) _S3 is operated while the basic watch mode or diving mode is set, this is detected (step _S8 or _S9 ).
The process proceeds to steps S ₁₀ and S ₁₁ , and M of RAM3 is
The data in the register is rewritten and the mode is switched. When the basic clock mode is switched to diving mode, the process proceeds to step _S12 , where the N register of RAM 3 is set to "1", thereby specifying the first mode among the various underwater depth processing modes. . After that, water depth function processing (steps) is performed according to the flow described below.
_S13 ), followed by display processing (step ₁₄ ). As a result, the processing of this general flow is completed, and the processing for starting other processing (not shown) is completed.
It becomes HALT state.

On the other hand, when the determination in steps _S7 and _S9 is "NO", in other words, when the mode selector switch _S3 is not operated in diving mode,
Proceeding to step _S13 , water depth function processing is performed.
Also, when the determination is ``YES'' in step S <sub>7</sub> and ``NO'' in step S ₈ , in other words, when the mode selector switch S ₃ is not operated in the basic watch mode, and ``NO'' is determined in step S ₇ . ”, “YES” in step S ₉ , in other words, when mode selector switch S ₃ is operated in diving mode,
The process then proceeds to step _S14 , where display processing is executed.

With this mode switching, the display state of the display section 9 becomes as shown in FIGS. 7a and 7b. Here, FIG. 7a shows the display state in the basic clock mode, and FIG. 7b shows the display state in the basic clock mode.
indicates the display state in diving mode, and the mode is switched cyclically each time the mode changeover switch _S3 is operated.

Next, the specific contents of the water depth function processing in step _S13 will be explained with reference to the flowchart of FIG. That is, first, when entering the water depth function processing flow, step _S1 is executed and RAM3 is
It is determined whether the data in the N register is "1" or not, but since the first depth processing mode is specified at the time of switching from basic watch mode to diving mode, proceed to the next step _S2. depth detection processing is executed. This depth detection process determines the diving depth S according to the water pressure acting on the pressure sensor 7.
(in feet), this depth S
Whether the value of is "0" in the next step _S3 , that is,
It is determined whether or not diving has started. Before the start of diving, the depth S is "0", so the water depth function processing ends.

Therefore, before the start of diving, the planned bottom depth is preset. In this case, the preset operation is as shown in Figure 7a in diving mode.
This is done by operating switches S ₁ , S ₂ , and S ₃ shown in FIG. First, operate switch _S2 to set it to preset mode. In this preset mode, switch _S3 is operated to select a digit to be set, and switch _S1 is then operated to increment the contents of the selected set digit. As a result, the planned bottom depth is preset in the PS register of RAM3. Assuming that a bottom depth of 120 feet is preset here, this value is digitally displayed on the display section 9 as shown in FIG. 7c.

After presetting the planned bottom depth in this way, when diving is started, water pressure acts on the pressure sensor 7, so that the corresponding depth S is detected. As a result, "NO" is determined in step _S3 of FIG. 6, and the process proceeds to step _S4 , where the timekeeping operation of the stopwatch is automatically started. Subsequently, "2" is set in the N register of the RAM 3, and the second water depth processing mode is designated.

In this second water depth processing mode, when entering the flow shown in Figure 6, the process proceeds from step _S1 to step _S6 , where it is determined whether the content of the N register is "2" or not. is "YES", and the same depth detection process (step _S2 ) as above is performed.
After step _S7 ) is executed, the process proceeds to step _S8 , where the detected depth S is compared with the preset depth in the PS register of the RAM 3, and it is determined whether the diver has reached the preset depth. If the preset depth has not yet been reached, the water depth function processing ends at this point, but once the preset depth has been reached, the process proceeds to step _S9 , where the operation decoder 2 outputs the control signal bu, which causes Then, the buzzer 13 is activated to generate an alarm sound, notifying the diver that the diver has reached a depth of 120 feet. Next, the process moves to step _S10 , where "3" is set in the N register and the third depth processing mode is designated. Note that the stopwatch continues to measure time at this point, and the diving time from the start of the dive until reaching the preset depth (120 feet) is approximately 70 feet.
As shown in Figure c, the dive time in seconds (2 minutes 49 seconds) is displayed along with the symbol mark "COMPRESS" at the bottom of the display 7, and the dive time in minutes is displayed at the top of the display 7. The dive time (002 minutes) is displayed.

Next, when the flow shown in Fig. 6 is entered while the third water depth processing mode is set, the setting state of that mode is detected in step _S11 , and the process proceeds to step _S12 , where switch _S1 is turned on. It can be checked whether it has been manipulated or not. In this case, switch S ₁ is operated when starting to ascend toward the water surface. If switch S ₁ is not operated, the water depth function processing will end at that point, but if switch S ₁ is not operated, If so, the process of shifting to the fourth water depth processing mode (step _S13 ) is executed.

Next, when the flow shown in FIG. 6 is entered in a state where the fourth water depth processing mode is set, the mode setting state is detected in step _S14 , and the process proceeds to step _S15 . Here, the depth decompression table (120 feet) in ROM4 is set according to the preset depth (120 feet) set in the PS register of RAM3.
feet decompression table) is specified, and the stop watch time (residence time) in the ST register is specified.
When 50 minutes, the first decompression time (15)
is read from ROM3 and set in the TM register of RAM3, and the depth of the first decompression point (20 feet) is read and set in the Y register of RAM3. Next, proceed to step S16 and proceed to step _S16 .
Processing for specifying the second water depth processing mode is executed. In addition, Fig. 7d shows the display state at this time, and the first depressurization time (15
minute 00 seconds) is the symbol mark “DECOMPRESS”
displayed with.

Next, when the flow shown in FIG. 6 is entered in a state where the fifth water depth processing mode is set, the setting state of that mode is detected in step _S17 , and the process proceeds to step _S18 , where the process proceeds to the above-mentioned step S. Depth detection processing similar to _{step 2} is executed, and the detected depth S obtained thereby is compared with the contents of the Y register of RAM 3 to determine whether or not the first decompression point has been reached in step _S19. be judged. If the first decompression point is not reached, the diver continues to ascend, and when the diver reaches the first decompression point of 20 feet, the diver proceeds to step _S20 , where an audible alarm is generated.
An announcement is made that the diver has stopped ascending. Next, the process proceeds to step _S21 , where a timer operation is started to subtract the decompression time (15 minutes 00 seconds) preset in the TM register of the RAM 3 by 11 minutes. after that,
Processing for shifting to the sixth water depth processing mode (step _S22 ) is executed. Figure 7e shows the display state at this time, and the first decompression point (20 feet)
For example, it is clearly shown that the remaining pressure reduction time is "14 minutes and 50 seconds."

Next, when the flow shown in FIG. 6 is entered while the sixth water depth processing mode is set, the setting state of that mode is detected in step _S23 ,
Proceeding to step _S24 , it is determined that the content of the TM register in RAM3 is "0", that is, the decompression time (15 minutes 00 minutes) at the first decompression point has elapsed, and,
When that time has elapsed, an alarm sound is generated (step _S25 ) to prompt the diver to ascend. Note that FIG. 7f shows the display state at this time. Then, the process proceeds to step _S26 , where the decompression table in ROM 4 is searched to determine whether there is data (decompression time, depth) for the next decompression point, and if so, the process proceeds to step _S27 , where the The process to move to the second depth processing mode is executed, and if there is no
Proceeding to _S28 , processing for shifting to the seventh water depth processing mode is executed.

Now, if the bottom residence time is 50 minutes, the decompression time will be less than 10 feet deep, which is the second decompression point, as shown in Figure 4.
Since 31 minutes is set, the fourth depth processing mode is returned to and the above-mentioned step _S15 is executed. The display state at this time is as shown in FIG. 7g, and the second decompression time "31 minutes 00 seconds" is displayed. Subsequently, when the diver ascends to 10 feet in the fifth depth processing mode, the above-mentioned steps S ₂₀ and S ₂₂ are executed, and as a result, the diver is notified by an alarm sound that the ascent has stopped, and a timer operation is started, and the second decompression is started. Time is being subtracted. The display state at this time is as shown in FIG. 7h. In the sixth depth processing mode, when it is detected that the second decompression time of 31 minutes has elapsed, an alarm sound is generated to prompt the diver to ascend. FIG. 7i shows the display state at this time.

Therefore, in this case, answer "NO" at step _S26 .
Therefore, the process proceeds to the seventh water depth processing mode, and step _S29 is executed. Here, it is determined whether or not the detected depth S is "0", in other words, whether or not the diving has ended. When the dive is completed, the timekeeping operation of the stopwatch is stopped (step _S30 ), and then a process for returning to the first depth processing mode (step _S31 ) is executed.
Figure 7j shows the display state at this time, and the time obtained by the stopwatch's timing operation is the total diving time from the start to the end of the dive, which in this case is "098 minutes". This is made clear.

It should be noted that the present invention is not limited to the above-described embodiments, and can be modified and applied in various ways without departing from the scope of the present invention. For example, in the above embodiment, the alarm sound is generated when the decompression time has elapsed, but the alarm sound may be generated so that the sound pressure of the alarm sound increases in stages each time the decompression time decreases. . Further, the notification means is not limited to an alarm sound, and may be used, for example, to drive a diaphragm to transmit vibrations to the human body to notify the diver tactilely. Further, in the above embodiment, a subtraction timer is used as the timer for measuring the decompression time, but of course, an addition timer may be used.

〔Effect of the invention〕

As explained in detail above, when the switch is operated when starting decompression, decompression data is automatically selected and specified according to the measured water depth and diving time, and a notification is given when the person ascends to the decompression depth. After the required decompression time has elapsed, it is determined whether or not there is next decompression data, and if there is, the operation is repeated based on the next decompression data, so there is no need to preset any data for decompression. By simply operating the switch when starting decompression, you can ascend according to the decompression table, making it easy to manage the time for decompression.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a block circuit diagram of an electronic watch with a depth gauge, and FIG.
Figure 3 is a configuration diagram of the ROM shown in Figure 1, Figure 4 is a diagram showing the specific contents of the 120-foot decompression table stored in the ROM, Figure 5 is a diagram showing the specific contents of the 120-foot decompression table stored in the ROM, FIG. 6 is a flowchart showing the overall operation of the electronic timepiece, FIG. 6 is a flowchart showing specific details of water depth function processing, and FIG. 7 is a diagram showing various display states. 1...ROM, 2...operation decoder, 3
...RAM, 4...ROM, 5...calculation section, 7...pressure sensor, 13...buzzer.

Claims (1)

[Scope of Claims] 1 Water depth detection means for detecting water pressure to obtain measured water depth data; Diving time counting means for counting diving time; Decompression data for storing a plurality of decompression data consisting of decompression depth data and decompression time data. a storage means, an operation switch, and a control unit that corresponds to the measured water depth obtained by the water depth detection means and the diving time obtained by the diving time counting means among the plurality of decompression data when the operation switch is operated; a decompression data specifying means for specifying decompression data obtained by the decompression data; and detecting whether or not the measured water depth data obtained by the water depth detection means has reached the decompression water depth data of the decompression data specified by the decompression data designation means. a reduced pressure water depth detection means; a notification means for notifying that the reduced pressure water depth detection means has detected the arrival of the reduced pressure water depth data; a decompression detection means for detecting that a time corresponding to the decompression time data of the decompression data has elapsed; and the decompression end detection means detects whether or not there is next decompression data when the elapse of the decompression time is detected. a determining means for determining, when the determining means determines that there is the next decompression data, controlling the decompression data selection and designation means to select and designate the next data; and a control means for repeatedly operating the decompression water depth detection means, the notification means, and the decompression end detection means based on the pressure reduction.