JP2808684B2 - Electronic depth gauge - Google Patents

Description

Description: TECHNICAL FIELD [0001] The present invention relates to an electronic water depth gauge that measures diving data such as water depth using a pressure sensor.

[Prior art and its problems] Conventionally, the depth is calculated from the pressure detected by the pressure sensor at the time of diving, the maximum depth, the diving data such as the average depth from the start of diving is automatically stored in the memory, and after the diving ends An electronic depth gauge capable of reading and displaying such diving data has been considered.

By using a water depth gauge having this memory function, diving data of a plurality of dives is stored in a memory, and the diving data can be easily attached by reading and displaying the diving data later.

In these depth gauges, the storage capacity of the memory is generally limited, so when multiple dives are performed and all data is written to the memory area, old diving data is erased in order, and new diving data is stored in the memory. It is configured to memorize.

In the above-described conventional depth gauge, even when diving for a short time due to diving, for example, when diving to a certain depth or more,
The dive data measured at that time is stored in the memory, and if the memory area is full at that time, the dive data is deleted in order from the oldest dive data. For this reason, there has been a problem that if the dive is repeated several times, diving data such as scuba diving which needs to be read later is deleted.

[Object of the invention]

An object of the present invention is to provide an electronic depth gauge capable of reliably storing diving data required for diving recording and the like.

[Gist of the invention]

According to the present invention, when the dive time measured by the timing means is equal to or more than a predetermined value, the dive data calculated from the pressure detected by the pressure sensor is stored in the storage means, and the dive data having a short dive time is stored. Since it is not stored in the means, it is possible to prevent the dive data already stored from being carelessly erased.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a circuit configuration diagram of an electronic wristwatch with a depth gauge according to one embodiment of the present invention.

In FIG. 1, an oscillation circuit 1 is a circuit that generates a clock signal having a constant period, and outputs the generated clock signal to a frequency dividing circuit 2. The frequency dividing circuit 2 divides the clock signal to generate a signal of, for example, 1 Hz and outputs the signal to the clock counting circuit 3 and an AND gate 9 described later.

The clock counting circuit 3 is a circuit that counts the 1 Hz signal and counts the current time.
In addition to outputting to the CPU 5, a day carry signal is output to the date counting circuit 4 after counting 24 hours. Further, the clock counting circuit 3 creates a 1/3 Hz measurement timing signal and outputs it to the AND gate 7.

The date counting circuit 4 is a circuit for counting the date by counting the date carry signal.
Output to

The CPU 5 is a central processing unit that controls the entire circuit,
For example, the current time and date are updated based on the time data T and the date data D from the clock circuit 3 and the date counter circuit 4, and based on the measurement timing signal of か ら Hz from the clock circuit 3. The water depth is measured by driving a pressure sensor 12 and the like described later at intervals of 3 seconds.

Flip-flop 6 is a circuit for storing whether it is set to depth gauge mode, set by a signal from the CPU5 accordance with the operation of the mode switch S _M, not shown, or is reset. For example, when switched to the depth gauge mode by operating the switch S _M, the flip-flop 7 the signal from CPU5 becomes a set state,
The Q output signal goes high and the AND gate 7 opens. Thereby, the measurement timing signal of 1/3 Hz from the clock circuit 3 is given to the CPU 5 via the AND gate 7,
Based on the measurement timing signal, the CPU 5 instructs the start of water depth measurement.

The flip-flop 8 is a circuit for storing whether or not the water depth is 1 m or more. The flip-flop 8 is set by a signal from the CPU 5 when the water depth is 1 m or more, and is reset when the water depth is less than 1 m. When the flip-flop 8 is set, the AND gate 9
Opens, and a 1 Hz signal from the frequency dividing circuit 2 is given to the timer 10.

The timer 10 is a circuit for counting the time signal of 1 Hz from the frequency dividing circuit 2 and counting the dive time. The timer 10 outputs the measured dive time ST to the CPU 5 and, if it measures 3 minutes from the start of the dive, 3 times. The minute carry signal is output to the latch circuit 11.

The latch circuit 11 is a circuit for storing whether or not the dive time is 3 minutes or more. When the dive time becomes 3 minutes or more and the carry signal is output from the timer 10 for 3 minutes, the carry signal is latched and the dive time is latched. Notify CPU5 that has exceeded 3 minutes.

The timer 10 and the latch circuit 11 are supplied with a clear signal from the CPU 5 at the start of measurement, and are cleared to their initial states.

The pressure sensor 12 is a sensor that detects the pressure at the diving point, and outputs an analog pressure signal corresponding to the pressure to the amplifier circuit 13. The amplification circuit 13 amplifies the analog output signal to a predetermined signal level and outputs the signal to the A / D conversion circuit 14. A
The / D conversion circuit 14 is a circuit that converts an analog pressure signal into a digital pressure signal, and outputs the converted pressure signal to the CPU 5.

These pressure sensor 12, amplifying circuit 13, and A / D conversion circuit 1
4 operates in accordance with the drive signal of 3 seconds period given from the CPU 5 to measure the water depth.

Switch unit 15, illustrated non Although mode switch S _M for switching the operation mode, the read mode of dive data, read switch S _P output for reading the data stored sequentially, time correction manipulated during time correction switch And outputs operation signals of these switches to the CPU 5.

The RAM 16 is a memory for writing and reading under the control of the CPU 5, and has various registers for storing measured diving data and the like.

 FIG. 2 is a diagram showing a configuration of the RAM 16.

In FIG. 2, a register H is a register for storing a measured water depth, a register AT is a register for storing the number of times the water depth has been measured since the start of diving, and a register AH stores an integrated value of the measured water depth. Register.

The register AV is a register for storing the average water depth in one dive, the register MAX is a register for storing the maximum water depth, the register ENT is a register for storing the descent time, and the register EX is for storing the ascent time. It is a register.

The register M is a mode register for storing a numerical value corresponding to the operation mode.
Is stored in the depth measurement mode, and M = 2 is stored in the dive data reading mode.

The register F _S is a register that is set to “1” when the water depth becomes 1 m or more.

Register F _T is set to "1" when the depth is not less than 1 m, a register that depth is reset to "0" when it becomes less than 1 m.

For example, the register F _S and F _T are set when depth diving is started it is equal to or greater than 1 m. When these registers are set, the measurement of the water depth and the measurement of the dive time are started by the measurement processing described later. In addition, when the water depth rises from the dive state to become less than 1 m and the register _FT is reset, the measurement of the water depth is continued, but the timing of the dive time is stopped.

Further, in the above RAM16 is provided with five memory M ₁ ~M ₅ for storing diving data, the most recent dive data is stored in the first memory M _1, 5 th memory M from the second or less descent time in ₂ ~M _5, new dive data of the date is stored in the order. When data is written to all of these five memories, the oldest data is stored in the next measurement.
Th dive data in the memory M ₅ is erased, the memory M ₁ ~M ₄
Are sequentially shifted to the next memory, and the latest dive data is written to the _first memory M1.

Register M _IST provided in each memory M ₁ ~M ₅ is a register for storing the dive time, the register M _IINT is a register for storing a descent time, the register M _IEX is a register for storing a floating time The register M _IMAX is a register that stores the maximum water depth, the register M _IAV is a register that stores the average water depth, and the register M _ID is a register that stores the date when the dive was performed.

Furthermore, the register P is a pointer to one of the five memory M ₁ ~M _5, is sequentially incremented each time the readout switch S _P is operated.

Returning to FIG. 1, the display drive circuit 17 is a circuit that converts diving data and the like output from the CPU 5 into display signals for driving the display elements of the display unit 18. The display unit 18 is composed of, for example, a liquid crystal display, and displays diving data such as current time, water depth, diving time, and the like according to a display signal from the display driving circuit 17.

 FIG. 3 is a configuration diagram of the display unit 18. As shown in FIG.

As shown in the figure, the display section 18 is provided with six segment display sections A to F.

The descent time is displayed on the segment display section B on the upper left side of the display section 18, and the maximum water depth is displayed on the segment display section D on the right side thereof.

In the segment display section C on the left side of the center, the depth of the dive point is displayed together with the character "DEPTH" when diving, and the ascent time is displayed together with the character "EX" when diving is completed.

The average water depth is displayed on the segment display section E on the right side.

In the lower segment display section A, the dive time is displayed together with the character "BOTTOM TIME" in the depth gauge mode, and the current time is displayed in the clock mode.

Further, the date of the current day is displayed on the lower segment display section F in the clock mode and the depth gauge mode,
In the read mode, the dive date of the displayed dive data is displayed.

Next, the operation of the embodiment having the above configuration will be described with reference to the flowcharts of FIGS.

FIG. 4 is a flowchart for explaining the overall operation of the embodiment.

First, in step S1 of FIG. 4, it is determined whether any switch has been operated.

When any switch is operated, a switch process in the next step S2 is executed.

Hereinafter, the contents of the switch processing will be described with reference to the flowchart of FIG.

First, in step ST1 of FIG. 5, that is operated to determine whether the mode changeover switch S _M.

When the mode changeover switch _SM is operated, it is determined whether the value of the mode register M is "0", "1", or "2" in the next step ST2.

When M = 0, that is, when the switch _SM is operated in the clock mode, the process proceeds to step ST3, where "1" is set in the mode register M and the mode is switched to the depth gauge mode. Then, in the next step ST4, the flip-flop 6 is set, and a measurement timing signal having a period of 3 seconds is given to the CPU 5.

In step ST5, each register H of the RAM 16
AT, AV, MAX, ENT, EX, F S, the F _T clear, further clears the timer 10 and the latch circuit 11.

Thus, when the mode is switched to the depth gauge mode, each register storing the measured depth, the number of measurements, the average depth, and the like is cleared, and the measurement of the depth by the pressure sensor 12 is started.

On the other hand, if M = 1 in the determination in step ST2, that is, if the switch _SM is operated in the depth gauge mode, the process proceeds to step ST6, where the mode register M is set to "2" to switch to the reading mode. And step
In ST7, the flip-flop is reset to stop measuring the water depth.

Further, in step ST8, the pointer P is set to "1".
And designate the _first memory M1.

Thereafter, in step ST9, it is determined whether or not the dive time of the current dive measured by the timer 10 is 3 minutes or more.

If dive time is 3 minutes or more, at the next step ST10, the memory M ₅ diving data stored in the memory M ₄
, The diving data stored in the memory M ₃ sequentially transfers the data of each memory M ₁ ~M ₄ and so ... in the memory M ₄ to the next memory, freeing the head of the memory M _1.

Then, in step ST11, the current dive time ST stored in the timer 10 is stored in the register _M1ST .

In step ST12, the descent time of the register ENT is stored in the register _M1ENT . In step ST13, the ascent time of the register _EX is stored in the register _M1EX .

In step ST14, the maximum water depth of the register _MAX is stored in the register _M1MAX.
The average water depth of V is stored in the register _M1AV .

Further, in step ST16, the date D of the day is stored in the register _M1D as the dive date.

On the other hand, in the determination in step ST9, the dive time ST is 3
If less than a minute, the memory of the dive data measured at that time M ₁
Is not stored.

That is, when the dive time of one dive is 3 minutes or more, the registers ST, EN
Diving data stored in T, EX, etc. is the first memory M
Stored in _1, when the dive time is less than 3 minutes, dive data at that time in the memory M ₁ not stored.

Accordingly, dive data when diving short time, such as skin diver is not stored in the memory M _1, dive data that needs to put diving recording can be prevented from being erased from the memory.

On the other hand, if M = 2 in the determination in step ST2, that is, if the switch _SM is operated in the read mode, the process proceeds to step ST17, where "0" is set in the mode register M, the mode is switched to the design mode, and the switch processing is completed. I do.

8 is a diagram showing an example of a display state when performing mode switching by operating the switch S _M described above.

When the switch _SM is operated in the clock mode (M = 0) shown in FIG. 8 (1), the mode is switched to the depth gauge mode, and the registers are initialized as shown in FIG. “0” is displayed in F as an initial state.

When the switch _SM is operated again in the depth gauge mode, the mode becomes the diving data reading mode as shown in FIG. 3C, and the newest diving data stored in the _first memory M1 is displayed.

In this case, the latest dive data is the dive data on the dive day May 20, and the dive time “10 minutes 56 seconds” and the maximum water depth “18.7
m ”and average water depth“ 8.8 m ”.

In the determination of step ST1 of FIG. 5, that is operated unless the switch S _M, the value of the advance mode register M to step ST18 to determine whether "2".

When there was a M = 2, in the next step ST19, it is determined whether the operation of the readout switch S _P. If the operation has been the switch S _P, the next step ST20
In increments the pointer P, then advancing the read address of the memory M _I.

Thereafter, in step ST21, it is determined whether or not the value of the pointer P has become "6". If P = 6,
This is the time when the pointer is further advanced after the reading of the diving data from the _fifth memory M5 is completed. In the next step ST22, the pointer P is set to "1" and the read address is returned to the head.

 If P <6, the process ends.

By these processes, the pointer P is sequentially advanced each time the switch _SP is operated, and the memory is processed by the display process described later.
The diving data stored in M _{1 to} M ₅ are sequentially displayed.

FIG. 9 is a diagram showing an example of a display state when the above-mentioned switch _SP is operated.

When switched to the read mode as described above,
First, the latest dive data stored in the _first memory M1, that is, the dive data of "May 20" is displayed (No. 9).
Figure (1).

When the switch _SP is operated in this state, the pointer P is advanced, and as shown in FIG. 9 (2), the dive data of "May 7" stored in the _second memory M2 is read out. Are displayed on the display unit 18. Hereinafter, displayed is read out dive data of the next memory every time to operate the switch S _P, 5 th to the next memory M _5, again the first memory M ₁
Is displayed.

If M is not equal to 2 in the determination in step ST18 in FIG. 5, it means that another switch for time adjustment or the like has been operated in the clock mode, and the process proceeds to step ST23 to execute a corresponding switch process.

When the switch process is completed as described above, the process proceeds to step S3 in FIG. 4 to determine whether the value of the mode register M is "1".

If the depth gauge mode is M = 1, in the next step S4, it is determined whether or not a measurement timing signal is input, and it is determined whether or not the measurement timing is every three seconds.

When the measurement timing signal is being input, the measurement processing of the next step S5 is executed.

Hereinafter, the contents of the measurement processing will be described with reference to the flowchart of FIG.

First, in step ST31 of FIG.
2. The A / D conversion circuit 14 and the like are driven, and the water depth data measured at that time is stored in the register H of the RAM 16.

Then, in the next step ST32, it is determined whether or not the water depth calculated from the pressure measured by the pressure sensor 12 is 1 m or more.

When the water depth is not less than 1m further register F _S is in the next step ST3 to determine whether "0".

When the water depth is 1 m or more and F _S = 0, it is when diving is started and the water depth reaches 1 m for the first time, and the next step ST34
The current time T at that time is stored in the register ENT as the descent time. Then, "1" is set in order to store the fact that the water depth is greater than or equal to 1m to register F _s.

Then, at the next step ST36, the register F _T to determine whether "0". When the vehicle reaches the point at the depth of 1 m for the first time, the register F _T has been reset to “0”. Therefore, the process proceeds to the next step ST38, where “1” is set in the register F _T and the fact that the dive is 1 m or more is stored. .

Further, in step ST39, the flip-flop 8
Is set to start measuring the dive time in the timer 10, and the process proceeds to the next step ST40.

On the other hand, if you have already reached a point at a depth of 1m or more,
Since the register F _S and the register F _T is set to "1", for each measurement timing of every 3 seconds, the process proceeds to step ST40 through step ST33 and ST36 described above.

In step ST40, in order to store that the water depth measurement has been performed once, the measurement number register AT is incremented, and the result is stored in the register AT.

In the next step ST41, the water depth data of the register H measured this time is added to the register AH storing the integrated value of the water depth data, and the result is stored in the register AH as a new integrated value of the water depth data.

In step ST42, the integrated value AH of the water depth data is measured
The average water depth is obtained by dividing by AT, and the result is stored in the register AV as average water depth data.

Further, in the next step ST43, the water depth data of the register H is compared with the maximum water depth data of the register MAX, and it is determined whether or not the water depth data H measured this time is larger than the maximum value MAX of the water depth data measured so far.

If it exceeds the maximum water depth, in the next step ST44,
The water depth data H measured this time is stored in the register MAX as the maximum water depth data. If H <MAX at this time, the process is terminated without rewriting the maximum water depth data in the register MAX.

On the other hand, the water depth measured in the determination of step ST32 is
If it is less than 1 m, the register F _T proceeds to step ST45 to determine whether "1".

When F _T = 0, it is when the water depth has not yet reached 1 m since the start of diving, and the processing is terminated and the water depth measurement is continued.

When F _T = 1, it means that the vehicle once dive to a depth of 1 m or more and then ascends to a point less than 1 m in depth. In the next step ST46, the register F _T is reset to “0”.

In the next step ST47, the flip-flop 8 is reset to stop the timer 10 from counting the dive time.

Further, in step ST48, the current time T at that time is stored in the register EX as the ascent time.

By these processes, it is switched to the depth gauge mode, first measurement of the water depth is started and the measured water depth is more than 1 m, "1" is set in the register F _S and F _T,
The timing of the dive time starts automatically. When the surface rises from that state and the water depth becomes less than 1 m, the register _FT is reset to “0” and the counting of the dive time is stopped.

At this time, the data stored in the registers AT, AH, MAX, etc. is saved as it is. Then, as described above, switching from the depth gauge mode to the reading mode is performed. If the dive time at that time is 3 minutes or more, the data of each register is stored in the _first memory M1. Further, when the dive is performed again to a point at a depth of 1 m or more in the depth gauge mode, the measurement of the dive time is restarted, and the depth data thereafter is stored in the registers.

When the measurement process is completed as described above, the display process in step S6 in FIG. 4 is executed.

Hereinafter, the contents of the display processing will be described with reference to the flowchart of FIG.

First, in step ST51 in FIG. 7, it is determined whether the value of the mode register M is "0", "1", or "2".

In the clock mode where M = 0, the process proceeds to step ST52 to display the current time data T from the clock counting circuit 3 on the display unit A.

Further, in the next step ST53, the date counting circuit 4
Is displayed on the display unit F.

On the other hand, in the determination of step ST51, if the depth gauge mode M = 1, the register F _T proceeds to step ST54 to determine whether "0".

When F _T = 1, that is, when the water depth is 1 m or more, step ST
The program proceeds to 55, where the water depth data in the register H is displayed on the display section C as the water depth at that point.

In the next step ST56, the time ST measured by the timer 10 is displayed on the display section A as the dive time at that time.

In step ST57, the descent time stored in the register ENT is displayed on the display section B.

In step ST58, the maximum water depth stored in the register MAX is displayed on the display unit D.

Further, in step ST59, the average water depth stored in the register AV is displayed on the display section E.

From these indications, the depth of the current point during the dive,
You can know the dive time, the maximum water depth so far, the average water depth, etc.

Also, if F _T = 0 in the determination of step ST54, that is, if the water depth is less than 1 m, the dive is finished after the dive is finished, or the dive is started and the water depth has not yet reached 1 m. The process proceeds to ST60 and displays the ascent time stored in the register EX on the display unit C.

At this time, as a result of ending the dive and ascending, if the water depth is less than 1 m, the ascent time of the register EX is displayed.If the water depth has not yet reached 1 m immediately after the start of the dive, the ascent time register Has been cleared to "0", "0" is displayed on the display section C.

Subsequent to step ST60, steps ST56 to ST59 described above are executed to display the dive time, dive time, maximum water depth, and average water depth stored in the registers ST, ENT, MAX, and AV.

At this time, if the dive is completed and the ascent is completed, the measured and calculated dive data is stored in each register, and the data is displayed on the display units C, A, B, D, and E. Is displayed.

If the water depth has not reached 1 m immediately after the start of the dive, each register remains cleared to “0”, and “0” is displayed on the display units A, B, D and E.

On the other hand, if M = 2 in the determination in step ST51, that is, if the dive data read mode, the process proceeds to step ST61, and first, the register M designated by the pointer P at that time
_The ascent time stored in the _PEX is displayed on the display unit C.

Similarly, in the next step ST62, the dive time of the register _MPST specified by the pointer P is displayed on the display section A.

In step ST63, the descent time of the register M _PENT is displayed on the display section B.

In step ST64, the maximum water depth of the register _MPMAX is displayed on the display unit D.

In step ST65, and displays the average depth of the register M _PAV on the display unit E.

Further, in step ST66, and displays the dive date of register M _PD on the display unit F.

As a result, in the read mode, the pointer P
In dive data in the specified memory M _P is displayed on the display unit.

FIG. 10 and FIG. 11 are views showing examples of display in the clock mode and the depth gauge mode.

When the mode is switched from the clock mode shown in FIG. 10 (1) to the depth gauge mode, the measurement of the depth starts and the depth at that point is displayed. If the measured water depth is less than 1 m, the dive time is not measured, and only the water depth at that point is displayed on the display section C as shown in FIG. 10 (2).

Thereafter, when the water depth becomes 1 m or more, the time at that time is stored in the register ENT as the descent time, the flip-flop 8 is set, and the measurement of the dive time is started.

FIG. 10 (3) shows a display state at a water depth of 8.2 m, a descent time “10:58” on the display B, a maximum water depth “8.2 m” so far on the display D, and a display C. At that time, the water depth “8.2 m” at that time, the display E shows the average water depth “5.6 m”, and the display A shows the dive time “14 seconds”, respectively.

Also, as shown in Fig. 11 (1), after diving to a point at a depth of 18.4m, and ascending to a point at a depth of less than 1m,
As shown in FIG. 2B, the display unit C replaces the previously displayed water depth with a rising time, for example, “10:45”.
Is displayed.

As described above, according to the above embodiment, only when the diving time is equal to or longer than the predetermined time, the collected diving data is stored in the memory, so that the diving data such as scuba diving already stored in the memory is The dive data necessary for attaching a dive record can be reliably stored without being rewritten with newly collected dive data for a short dive such as a dive.

In the above embodiment, the water depth measurement is automatically started when the water depth becomes equal to or more than a certain water depth. However, the water depth measurement may be started when a switch or the like is operated.

Further, the electronic water depth gauge of the present invention is not limited to the electronic timepiece described in the embodiment, but may be incorporated in other electronic devices, and may be a device dedicated to water depth measurement.

〔The invention's effect〕

According to the present invention, since diving data when the diving time is less than the predetermined value is not stored in the memory, diving data such as scuba diving having a relatively long diving time can be preferentially stored in the memory. Also, it is possible to prevent diving data necessary for attaching a diving record from being erased from the memory.

[Brief description of the drawings]

1 is a circuit configuration diagram of an electronic wristwatch with a depth gauge according to an embodiment of the present invention; FIG. 2 is a configuration diagram of a RAM of FIG. 1; FIG. 3 is a configuration diagram of a display unit of FIG. Fig. 4 is a flowchart for explaining the overall processing of the embodiment, Fig. 5 is a flowchart for switch processing, Fig. 6 is a flowchart for measurement processing, Fig. 7 is a flowchart for display processing, Figs. FIG. 11 is a diagram illustrating an example of a display state according to the embodiment. 5 ... CPU, 6, 8 ... Flip-flop, 10 ... Timer, 12 ... Pressure sensor, 16 ... RAM.

Claims (1)

(57) [Claims] 1. A pressure sensor; diving data calculation means for obtaining diving data from pressure data detected by the pressure sensor; storage means for storing diving data; timing means for timing diving time; And a storage control means for storing the dive data obtained by the dive data calculation means in the storage means when the dive time measured in step (c) is equal to or longer than a predetermined value.