JPH06102059A - Electronic depth gauge - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to provide an electronic depth gauge that can display the entire diving profile consisting of data that changes over a wide range and can also display subtle data changes in the diving profile. [Structure] The microcomputer 1 controls the scale of the graph display on the display unit 15 according to the value of the dive data to be displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic depth gauge suitable for a diver to carry with him during diving and confirm his own diving profile.

[0002]

2. Description of the Related Art Conventionally, an electronic depth gauge has been widely put into practical use, which is used by a diver for attaching to a wrist like a wristwatch during diving to obtain his / her own diving profile and avoid decompression sickness. By the way, this kind of electronic water depth meter generally allocates the measured diving time and the corresponding water depth to two axes orthogonal to each other (that is, the X axis and the Y axis) to determine the relationship between them, that is, the diving profile. A display for displaying a graph is used for display on the display unit.

[0003]

However, in the electronic water depth gauge as described above, in order to display all the data that may change in a wide range on the limited small display surface, the display is made. The scale is increased (that is, the range of values represented by one graph display body is also increased) and the display scale is fixed. Therefore, for example, if the data such as the water depth slightly changes, it is displayed at the same level as the previous data, and it is not possible to represent a subtle change in the data. The present invention has been made in view of the above circumstances, and provides an electronic water depth gauge that can display the entire diving profile consisting of data that changes in a wide range and can also display subtle data changes in the diving profile. With the goal.

[0004]

According to the present invention, in order to achieve the above object, the scale of the graph display on the display unit is changed according to the value of the display data.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings. FIG. 1 shows the circuit configuration of this embodiment. That is, the present embodiment has a configuration in which the CPU 1 is mainly connected to other circuit portions. The CPU 1 is a circuit unit that processes and processes the sent data, sends the data, and sends a signal to control other circuit units.

The oscillation circuit 2 is a circuit which constantly sends a signal of a constant frequency. The frequency dividing circuit 3 is a circuit that divides the signal from the oscillation circuit 2 to a predetermined frequency and sends it to the total clock circuit 4 and the AND gate 6. The total clock number circuit 4 counts the signal from the frequency dividing circuit 3 to obtain the current time, sends this to the CPU 1, and outputs the current time to the CPU 3.
It is a circuit that sends a 30-second signal, which is a measurement timing signal such as water pressure, to the CPU 1 every 0 second.

The RS flip-flop 5 is a circuit which receives a set signal or a reset signal from the CPU 1 to enter a set state or a reset state, and outputs an output Q in the set state. The AND gate 6 is opened by the output Q from the RS flip-flop 5 to generate the frequency dividing circuit 3
Is a circuit for giving a signal of a predetermined frequency from the dive time counting circuit 7. The dive time counting circuit 7 counts the above signals sent through the AND gate 6 to measure the elapsed time, sends the measured elapsed time to the CPU 1 as the dive time, and receives the clear signal from the CPU 1. It is a circuit unit that clears the measured elapsed time.

The RAM 8 has a configuration described later, and the CPU 1
The data from the CPU 1 is stored under the control of
It is a circuit unit that sends the stored data to the CPU 1. The ROM 9 fixedly stores programs for various kinds of processing as an electronic water depth gauge and so-called decompression tables created by the US Navy, etc.
This is a circuit unit for sending to PU1. The pressure sensor 10, the amplification circuit 11, and the A / D conversion circuit 12 are circuit units that are activated by receiving an activation signal from the CPU 1.
0 sends out the analog electric signal of the level according to water pressure to the amplifier circuit 11, and the amplifier circuit 11 amplifies this analog electric signal and gives it to the A / D conversion circuit 12, and the A / D conversion circuit 12 carries out this amplification. The converted analog electric signal is converted into a digital electric signal and given to the CPU 1.

The switch unit 13 is a circuit which includes various switches and which sends a switch input corresponding to the switch to the CPU 1 when any of these switches is operated. The display drive circuit 14 drives the display unit 15 to drive the CPU 1
It is a circuit that displays various data sent from. The display unit 15 displays the diving profile as shown in FIG. 8 for explaining the display process.
5a and digital display 1 for digitally displaying the dive time etc.
5b, and the graph display unit 15a is provided with square graph display bodies 16 arranged in a matrix of 30 in the vertical direction and 40 in the horizontal direction. Numerical indicators for indicating the scales of the vertical axis and the horizontal axis are provided on the left side and the upper side of the.

FIG. 2 shows the structure of the RAM 8. As shown in FIG. 2, the RAM 8 is composed of a dive recording section DM and a register section RA. The dive recording unit DM is composed of 240 rows to which row addresses 1 to 240 are respectively given, and in each row, the water depth, the dive time, and the degree of ascent of the ascending speed obtained at the same measurement timing are stored. A memory, a dive time memory, and a flying speed flag are provided. For example, in the row of row address 1, the water depth memory MA ₁ , the dive time memory MB ₁ , the ascending speed flag MC
₂ , and the depth memory M in the row of row address 239
A ₂₃₉ , dive time memory MB ₂₃₉ , ascent speed flag MC
₂₃₉ is provided.

In the register unit RA, the mode register M is a register for designating a mode. When 0 is set, the mode register M designates a clock mode for displaying the present time from the total clock circuit 4 on the display unit 15. When 1 is set, an electronic water depth meter is used to specify the measurement mode in which the water depth is measured every 30 seconds and the result is recorded in the dive recording unit DM, and when 2 is set. Specifies the read mode when the data recorded in the diving recording section DM in the above measurement mode is displayed on the display section 15 for confirmation. The display mode register N is a register for designating the display mode of the graph display unit 15a in the measurement mode, and when 0 is set, the relationship between the dive time from the dive start and the water depth is displayed as a whole, When 1 is set, the one closest to the current point in the relationship between the dive time and the water depth is displayed in close-up, and when 2 is set, the proper decompression profile for ascent is displayed.

The water depth register D is a register in which the water depth obtained every 30 seconds is sequentially set. The maximum water depth register DA is a register in which the deepest water depth in this dive is set. The water depth axis scale register A is a register for designating the vertical axis direction of the graph display portion 15a, that is, the scale of the water depth, and when 1, 2, 3, 4 are set, the entire length of the vertical axis, that is, the full scale. Is designated as 15, 30, 60, 120 m. The time axis scale register B is a register for designating the scale of the horizontal axis direction of the graph display unit 15a, that is, the diving time, and when 1, 2, 3, and 4 are set, the entire length of the horizontal axis, that is, full scale, respectively. The scale is specified to be 20, 40, 80, 120 minutes.

The stored data set number register I is a register in which the number of data sets recorded in the diving recording section DM, that is, the row address of the row having the largest row address among the rows in which data has already been stored is set. Is. The diving flag SF is a flag whose set value is 1 only while diving is performed in the measurement mode. The long-time dive flag OF has a set value of 1 when the number of measurements such as water depth every 30 seconds exceeds 240 and data has already been stored in all the rows of the dive recording unit DM. It is a flag that becomes.

Next, the operation of this embodiment configured as described above will be described. FIG. 3 is a general flowchart showing an outline of the operation of this embodiment. FIG. 4 shows FIG.
5 is a detailed flowchart of the switch process of step S9 of FIG. 5, FIG. 5 is a detailed flowchart of the measurement process of step S11 of FIG. 3, and FIG.
7 is a flowchart showing in detail the scale determination processing in step S57, and FIG. 7 is a flowchart showing in detail the display processing in step S12 in FIG. Furthermore, FIG.
9 is a diagram showing a display example on the display unit 15, and FIGS.
3 is a diagram showing a display example on the graph display unit 15a. The operation in various states will be described below with reference to these drawings.

(A) Operation in clock mode For example, if the value of the mode register M is 0 and the clock mode is set, the switch operation is not performed unless the switch is operated. Then, it is determined that the value of the mode register M is not 1, that is, that the mode is not the measurement mode, and the process proceeds to step S12, that is, the display process of FIG. 7. At step S80, the value of the mode register M is 0 and the clock mode is set. The digital display unit 15 of the display unit 15 in step S81.
The current time sent from the total clock circuit 4 is displayed in b and the process returns to step S1 in FIG.

(B) Operation in measurement mode To switch from the timepiece mode to the measurement mode, the mode switch SM is operated. At this time, step S1 of FIG.
In step S2, it is determined that the switch operated is the mode switch SM, and in step S3, it is determined that the value of the mode register M is 0 and the watch mode is set. After that, the process proceeds to step S4 and the value of the mode register M is set to 1 to set the measurement mode. After that, the process proceeds to step S10, the value of the mode register M is already 1 and it is determined that the mode is in the measurement mode, and the process proceeds to step S11, that is, the measurement process of FIG. After the measurement process is completed, step S12 of FIG. 3, that is, the display process of FIG. 7 is executed, and then the process returns to step S1. Hereinafter, unless there is a switch operation, the above-described measurement processing is executed in step S11 via steps S1 and S10. In step S12, the measurement result and the like are displayed on the display unit 15, and the operation of returning to step S1 is repeated.

The above measurement process (FIG. 5) will be described in detail below. First, in step S35, the total clock number circuits 4 to 3
It is determined every 30 seconds whether the 30-second signal sent as the measurement timing signal is sent. If it has not been sent, this measurement process is terminated, but if a 30-second signal has been sent, the process proceeds to step S36. In this step S36, the pressure sensor 10, the amplifier circuit 11, A /
A start signal is sent to the D conversion circuit 12 to detect the pressure, and in the next step S37, the water depth is calculated from the detected pressure, and the calculated water depth is set in the water depth register D. The calculation of the water depth in this case is based on the calculation method that has been conventionally performed with a water depth gauge.

After calculating the water depth, the process proceeds to step S38, and it is determined whether the calculated water depth is 1.5 m or more. When the water depth is 1.5 m or more, it is determined that diving is being performed, the process proceeds to step S39, and it is determined whether the value of the diving flag SF is 0. If it is 0 immediately after the dive is started, step S40 is performed. Then this submersible flag SF
The value of is set to 1 and the start of diving is stored. Next, in step S41, a set signal is sent to the RS flip-flop 5 to set it, the AND gate 6 is opened, and a signal of a predetermined frequency from the frequency dividing circuit 3 is sent to the dive time counting circuit 7 to count the dive time. The measurement of the dive time by the circuit 7 is started. After finishing the process of step S41,
Proceeding to step S42, an initial setting process for clearing the previous diving data stored in the diving recording section DM and further clearing the maximum water depth register DA is executed. Next, in step S43, 0 is set in the storage data set number register I, and it is stored that all the data in the dive recording section DM have been cleared.

As described above, the diving flag SF is set to 0 after the processing of step S43 is completed or in step S39.
Instead, when it is determined that it is not immediately after the start of the dive, it is determined in step S44 whether the value of the long-time dive flag OF is 0, and the value of the long-time dive flag OF is 0.
If it is, the process proceeds to the next step S45, and the value of the storage data set number register I is increased by 1 and then step S45.
At 46, it is determined whether or not the value of the storage data set number register I exceeds 240 by the processing of step S45, that is, whether or not the data is already stored in all the rows of the dive recording unit DM, and the data is stored. If the value of the data set number register I exceeds 240 and is 241, the process proceeds from step S46 to step S47, the value of the long-time dive flag OF is set to 1, and the value of the stored data set number register I is set to 240 in step S48. I will return to.

When the process of step S48 is completed, or when it is determined in step S44 that the value of the long-time dive flag OF has already become 1 instead of 0 (that is, all of the dive recording units DM have the same value). (When data is stored in the row), the process proceeds to step S49, and the stored contents of the water depth memory, the dive time memory, and the ascent velocity flag of each row of the dive recording unit DM are stored in the corresponding memory of the row whose row address is smaller by one. The data is shifted and stored. For example, the content stored in the water depth memory of the row at the row address 240 is the row address 2
It is stored in the water depth memory of the 39th row or the like. This step S4
When the processing of 9 is completed or when it is determined in step S46 that the value of the stored data set number register I does not exceed 240, the process proceeds to step S50 and the water depth related to the current measurement set in the water depth register D is reached. Is stored in the water depth memory MA _I designated by the storage data set number register I. Next, in step S51, the dive time from the dive time counting circuit 7 is stored in the dive time memory MB _I designated by the storage data set number register I. Then, in step S52, 1 is set from the value of the storage data set number register I.
Stored in the depth memory MA _I specified by the value of the stored data set number register I water depth according to the measurement of the last time stored in the depth memory MA _I-1 which is designated (30 seconds before) by the subtracted value The water depth related to the current measurement is reduced, and the difference exceeds the preset dangerous rising water depth (that is, the flying distance in the 30 seconds between the previous measurement and the current measurement is dangerous enough to cause decompression sickness). What?)
To judge. Then, when the difference is greater than the danger increase water depth, at step S53 in order to store the fact, but is set to 1 ascent rate flag MC _I specified by the stored data sets the number of register I, on the other hand, when not exceed dangerous increase depth, in order to store the fact in step S54, 0 is set to the floating speed flag MC _I. After finishing the process of step S53 or S54, the process proceeds to step S55, where the water depth set in the water depth register D is the maximum water depth register D.
It is judged whether the water depth is deeper than the deepest water depth set in A, and if it is deep, the operation proceeds to step S56, where the water depth of the water depth register D is the maximum water depth register DA.
After updating the water depth in step S57, the process proceeds to step S57, but when it is determined in step S55 that the water depth related to the current measurement of the water depth register D is not deeper, the process directly goes from step S55 to step S57. move on.

In step S57, that is, in the scale determination process of FIG. 6, first, the deepest water depth set in the maximum water depth register DA in step S65, that is, the deepest water depth obtained by the previous measurements is 15 m. Less than,
15m over 30m, 30m over 60m, 6
It is judged which one is over 0m. When it is 15 m or less, the procedure goes to step S66, and 1 is set in the water depth axis scale register A so that the depth scale full scale is set to 15 m. Set 2 to the depth axis scale register A to make it 30 m,
If it exceeds 60 m and is less than 60 m, proceed to step S68 and set 3 in the depth axis scale register A to set the full scale of the depth axis to 60 m. If it exceeds 60 m, proceed to step S69 and set the full scale of the depth axis. 4 is set in the depth axis scale register A so as to be 120 m. After the processing of any of the above steps S66 to S69 is completed, the dive time of the dive time counting circuit 7 is 20 minutes or less, 20 minutes or less.
40 minutes or less over 40 minutes, 80 minutes or more over 40 minutes, 80
Determine if it is over minutes. When it is 20 minutes or less, the process proceeds to step S71, and 1 is set in the time axis scale register B so that the full scale of the time axis is 20 minutes. When it is more than 20 minutes and 40 minutes or less, the process proceeds to step S72 and the time axis Set 2 to the time axis scale register B to set the full scale to 40 minutes, and if it exceeds 40 minutes and is 80 minutes or less, proceed to step S73 and set to the time axis scale register B to set the time axis full scale to 80 minutes. 3 is set, and when it exceeds 80 minutes, the process proceeds to step S74 and 4 is set in the time axis scale register B so that the full scale of the time axis is 120 minutes.

After the scale determination process of step S57 of FIG. 6 or FIG. 5 is finished, the measurement process of FIG. 5 is finished and the process proceeds to step S12 of FIG. 3, that is, the display process of FIG.

Note that steps S60 to S62 in FIG. 5 are the processes performed when the user finishes diving and ascends. That is, when the water surface has risen and the water depth is no more than 1.5 m, it is confirmed in step S60 that the value of the dive flag SF is 1, and in step S61 the value of the dive flag SF is set to 0.
Then, the RS flip-flop 5 is reset in step S62, and the measurement of the dive time by the dive time counting circuit 7 is stopped.

Next, the display processing in this measurement mode will be described.
This will be described with reference to FIG. In this display process, first,
After step S80, go to step S85
Judge that the value of M is 1 and it is in measurement mode,
In step S86, the value of the display mode register N becomes 0.
Determine if And when it is 0,
In step S87, the digital display section 15b of the display section 15 is displayed.
The water depth in the water depth register D is displayed.
When diving from the dive time counting circuit 7 on the digital display section 15b
Display the distance. Then, in step S89, the depth axis scale
Depending on the value of the register A
The reference depth scale is displayed on the vertical axis of the indicator 15a, and step S
90, the value of the time axis scale register B is 1 to 4
When it is 1 by judging whether it is a deviation value
Is step S91, and when it is 2, step S9
If it is 3, 3 then go to step S95, then 4
If so, proceed to step S97. Time scale
If the value of the register B is 1 and the process proceeds to step S91.
As for the water depth memory MA of the dive recording unit DM₁~ MA₄₀In
Each stored water depth is displayed in the graph display section 15a.
The rough display body 16 is displayed in each column, and the next step S92 is performed.
Flying speed flag MC of the forward dive recording unit DM₁~ MC₄₀To
When 1 is set, the corresponding water depth is displayed.
Switch the column of the graph display body 16 shown to blinking display.
Get If the value of time axis scale register B is 2,
If you proceed from step S90 to step S93, dive recording
Water depth memory MA₁~ MA₈₀Water remembered in
For the depth, calculate the average of two from the previous one.
(Ie, water depth memory MA₁And MA₂Average depth of water,
Depth memory MA₃And MA_FourAverage water depth, water depth memory MA
_FiveAnd MA₆Of the water depth of the
The average water depth is displayed on the graph display unit 15a.
Display in 16 columns, then proceed to step S94
Upper speed flag MC₁~ MC₈₀If 1 is set to
Shows the average water depth between the corresponding water depth and other water depths.
Switch the column of the graph display body 16 shown to blinking display.
Get If the value of time axis scale register B is 3, the above step
If you proceed from step S90 to step S95, note the water depth.
Re-MA₁~ MA₁₆₀Regarding the water depth stored in
From each one, calculate the average of four (ie
Memory MA₁~ MA_FourAverage water depth, water depth memory MA_Five~
MA₈Average water depth, water depth memory MA₉~ MA₁₂The depth of water
Calculate the average, .....), and calculate each average water depth obtained.
Displayed in each column of the graph display body 16 of the graph display unit 15a
Then, the process proceeds to step S96, and the floating speed flag MC
₁~ MC₁₆₀Corresponds to when 1 is set to
Shows the average water depth between the water depth and the other three water depths
The column of the graph display body 16 is switched to blinking display. time
If the value of axis scale register B is 4 and the above step S90
From step S97 to the depth memory MA₁~
MA₂₄₀About the water depth remembered in
Sequentially, an average of 6 each is calculated (that is, the depth memory M
A₁~ MA₆Average water depth, water depth memory MA₇~ MA₁₂of
Average depth, depth memory MA ₁₃~ MA₁₈Average depth of water,
……… is calculated) and the average water depths obtained are
In each column of the graph display body 16 of the display unit 15a,
Then, the process proceeds to step S98, and the floating speed flag MC₁~ M
C₂₄₀When 1 is set to, it corresponds
Above showing the average depth of water depth and the other 5 depths
The column of the graph display body 16 is switched to blinking display.

Steps S92, S94, S96, S
When any of the processes of 98 is completed, step S9
9, the value of the long-time dive flag OF is judged to be 0,
When it is 0, the process proceeds to step S100 and the reference time scale is displayed on the time axis, that is, the horizontal axis of the graph display unit 15a according to the value of the time axis scale register B (that is, as described above, the time axis scale register). The value of B is 1,
In case of 2, 3 and 4, the full scale is 20, 4 respectively.
Display the reference time scale at 0, 80, 120 minutes). On the other hand, when it is determined in step S99 that the value of the long-time dive flag OF is not 0 but already 1, the process proceeds to step S101, and the dive time memory MB ₂₄₀
The standard dive in which the time (only the minute digit is rounded down to the nearest 30 seconds) stored in is the full scale scale on the horizontal axis, and the leftmost minimum time scale is 120 minutes before the above time. Execute the time scale display process.

Maximum water depth The maximum water depth of the register DA is 29 m.
, The value of the water depth scale register A is 2, the diving time from the dive time counting circuit 7 is 39 minutes, the value of the time axis scale register B is 2, and the water depth register D
When the current depth of water is 3.2 m, the above steps S87 to S90, S93, S94, S99, S10 are performed.
The processing of 0 is performed (the full scale on the water depth axis of the graph display section 15a is 30 m, the full scale on the time axis is 40 minutes), and the display on the display section 15 is as shown in FIG. 8, for example. Note that FIG. 9 is an enlarged view of the display of the graph display unit 15a in FIG. In the display example above, 1 is set for any ascent rate flag in the processing of step S94.
Although the display was not switched to the blinking display because was not set, for example, a dive similar to the above example was performed, but the ascent did not occur at the time of 24 minutes and 26 minutes. If the ascending speed flags corresponding to the two are set rapidly, the above step S94 is executed.
By the processing of, the column of the corresponding graph display body 16 becomes a blinking display, and becomes, for example, as shown in FIG.
In the figure, the graph display body 16 with a slant line indicates that it is a blinking display). Also, maximum water depth register D
When the maximum water depth of A is 52 m, the value of the depth axis scale register A is 3, and the dive time from the dive time counting circuit 7 is 78 minutes and the value of the time axis scale register B is 3, Steps S87 to S90, S95, S
96, S99, S100 are performed (that is, the depth scale full scale of the graph display unit 15a is 60 m, the time scale full scale is 80 minutes), and the graph display unit 1
The display of 5a is as shown in FIG. 11, for example. Then, when the value of the display mode register N is set to 1 by a switch operation described later in order to confirm the last dive profile in detail when the dive time reaches 70 minutes, the steps S105 to S107 and S111 are performed. The processes from S113 to S113 are performed, and the dive profile before the dive time of 70 minutes is enlarged on the graph display unit 15a.
The display of 5a is as shown in FIG. 12, for example.

The above display operation is performed when it is determined that 0 is set in the display mode register N in step S86. However, there is a switch operation such as the switch SA, and a switch which will be described later is accompanied therewith. When 1 is set in the display mode register N in the process (step S9 of FIG. 3, that is, FIG. 4), and that effect is detected in step S105, the process proceeds to step S106, where the depth axis of the depth axis The reference water depth scale on the vertical axis of the graph display unit 15a is displayed. Next, in step S107, it is determined whether or not the value of the storage data set number register I is 40 or less (that is, the depth data of the diving recording section DM is 40 or less). Using each column of the display body 16, the water depth memory MA
Display the water depth of _{1 to} MA _{40 in} a graph. Then step S
At 109, 1 out of the floating speed flags MC _{1 to} MC ₄₀
The column of the graph display body 16 displaying the water depth corresponding to that set to is switched to the blinking display, and in the next step S110, the value of the time axis scale register B is set as the time axis scale of the graph display section 15a. When the value is 1, that is, the full scale is 20 minutes, the standard diving time scale is displayed.

On the other hand, when it is determined in step S107 that the value of the storage data set number register I is not 40 or less, that is, the depth data or the like stored in the dive recording unit DM is already 41 or more. If it is determined that the value of the stored data set number register I is subtracted from 39, the depth memory MA _I-39 is designated by the value of the stored data set number register I _The 40 water depth data stored in _I is displayed by using each column of the graph display body 16 of the graph display unit 15a. Next, in step S112, the floating speed flag MC corresponding to the water depth data related to the above display.
_I-39 to MC 1 is what is set when the _I is a graph display 1 that displays the water depth corresponding thereto
Switch column 6 to blinking display. And step S113
Then, as a scale of the time axis of the graph display unit 15a, the diving time of the diving time memory designated by the value of the stored data set number register I is set to full scale, and the time 120 minutes before this is set as the start time. The dive time scale is displayed.

In addition, when the value of the display mode register N is set to 2 by a switch operation to be described later, in order to confirm an appropriate ascending process capable of avoiding decompression sickness when ascending after diving in this measurement mode. Advances from step S105 to step S115 in the display processing, and the RAM 8
Based on the above data, proper decompression process data is obtained from the ROM 9 and displayed on the graph display section 15a as shown in FIG. 13, for example. In the figure, the column of the graph display body 16 on the leftmost side is indicated by a slanting line, and this blinking display is performed to show that the water depth at that time is displayed. .

Next, in this measurement mode, a switch process when a switch operation is performed for changing the value of the display mode register N to switch the display of the display section 15 as described above will be described. When the switch operation is performed, it is detected in step S1 of FIG. 3, and the process proceeds to step S9, that is, the switch process of FIG. 4 through step S2. In this switch processing, first, in step S1, it is confirmed that the value of the mode register M is 1 and the measurement mode is set. Then, step S21
Then, it is determined whether the operated switch is the switch SA. If it is the switch SA, it is determined in step S22 whether the value of the display mode register N is 0. If it is 0, further step S23 is performed. Determines whether the value of the time axis scale register B is other than 1 (that is, the dive time exceeds 20 minutes), and if the dive time is other than 1 and the dive time already exceeds 20 minutes, display in step S24. The value of the mode register N is set to 1, but when it is determined in step S23 that the value of the time axis scale register B is 1, the switch process is terminated without changing the value of the display mode register N. On the other hand, when it is determined in step S22 that the value of the display mode register N is not 0, the value of the display mode register N is reset to 0 in step S25.

When it is determined that the switch operated in step S21 is not the switch SA, it is determined in step S26 whether the switch SB is operated. When the switch SB is operated, it is determined in step S27 whether or not the value of the display mode register N is 0. If it is 0, the process proceeds to step S28, in which the data etc. of the dive recording section DM is used for ascending. If it is determined that the pressure reduction is required, the process proceeds to step S29 only when the pressure reduction is required, the value of the display mode register N is set to 2, and the display of the pressure reduction profile is instructed. On the other hand, when it is determined in step S27 that the value of the display mode register N is other than 0, the value of the display mode register N is reset to 0.

(C) Operation in the read mode When diving, the dive data stored in the dive recording section DM of the RAM 8 is displayed on the display section 15 for confirmation later.
The read mode is set. To switch to this mode, the mode switch SM is operated after switching to the measurement mode. At this time, the process proceeds to step S5 through steps S1 to S3 of FIG. 3, and it is confirmed that the value of the mode register M is 1 and the measurement mode is set, and the value of the diving flag SF is 0 in the next step S6. Then, it is confirmed that the vehicle is not under diving, and then the process proceeds to step S7 to set the value of the mode register M to 2 and the reading mode is set. After the reading mode is set in this way, the process proceeds to step S12, that is, the display process of FIG. 7 through step S10, and proceeds to the graph display process of step S116 through steps S80 and S85. This graph display processing is similar to the processing of steps S89 to S101 in the figure showing the display processing in the above-mentioned measurement mode (the processing surrounded by the dotted line in the figure), and the display as described above (see FIG. 9 to 11) are displayed on the graph display unit 15a.

[0033]

As described in detail above, the present invention relates to an electronic water depth gauge in which the scale of the graph display on the display unit is changed according to the value of the display data.
(EN) It is possible to provide an electronic depth gauge that can display the entire diving profile consisting of data that changes over a wide range and can display subtle data changes in the diving profile.

[Brief description of drawings]

FIG. 1 is a diagram showing a circuit configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a RAM shown in FIG.

FIG. 3 is a general flowchart showing an outline of the operation of the above embodiment.

FIG. 4 is a flowchart showing details of a switch process in FIG.

5 is a flowchart showing in detail the measurement process in FIG.

FIG. 6 is a flowchart showing details of scale determination processing in FIG.

7 is a flowchart showing in detail the display processing in FIG.

FIG. 8 is a diagram showing a display example of diving data on a display unit.

FIG. 9 is a diagram showing a display example on a graph display unit.

FIG. 10 is a diagram showing a display example on a graph display unit.

FIG. 11 is a diagram showing a display example on a graph display unit.

FIG. 12 is an example of a close-up display on the graph display unit.

FIG. 13 is a display example of a pressure reduction profile on a graph display unit.

[Explanation of symbols]

7 Dive time counting circuit 15a Graph display unit 15b Digital display unit 16 Graph display unit DM Dive recording unit RA register unit MA _{1 to} MA ₂₄₀ Depth memory MB _{1 to} MB ₂₄₀ Dive time memory MC _{1 to} MC ₂₄₀ Ascent velocity flag A Water depth axis Scale register B Time axis scale register M Mode register N Display mode register D Water depth register DA Maximum water depth register I Stored data set number register OF Long time diving flag SF Diving flag

Claims (1)

[Claims] 1. A water depth detecting means for obtaining water depth data, a diving time measuring means for measuring diving time data, and a diving time for diving based on the water depth data by the water depth detecting means and the diving data by the diving time measuring means. Graph display means for displaying a graph of the relationship with the water depth, and the scale of the graph of the relationship between the dive time and the water depth displayed by the graph display means is changed according to the value of the water depth data or the value of the dive time data. An electronic water depth gauge, comprising: a scale changing means.