JPH049545Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Technical field of invention] The present invention relates to an electronic pressure measuring device.

[Prior Art] Recently, it has been considered to provide an electronic wristwatch with a pressure sensor to measure and display the depth during diving.

[Problems with the prior art] However, since the above-mentioned electronic watch with a depth gauge only displays the water depth, it is not suitable for so-called underwater diving, where the user continuously moves to a plurality of predetermined points by diving, for example. When used for navigation, it was only possible to know the water depth at the current location while moving.

However, when moving between predetermined points one after another by diving, such as underwater navigation, it is important to know not only the depth of the water at each point, but also how long it takes to travel between the predetermined points. I would also like to know about Katsutaka.

In such cases, it is generally necessary to use a stopwatch other than a pressure gauge to start at the starting point and take a lap or stop at each destination point, which is cumbersome. .

In addition, especially in underwater navigation under the sea, the water depth, or water pressure, changes depending on the ebb and flow of the tide, so even if the course is the same, travel time can vary greatly depending on the time of travel. is necessary data for underwater navigators,
With conventional pressure gauges, it was not possible to obtain such data.

[Purpose of the invention] The invention was developed against the background of the above-mentioned circumstances, and its purpose is to easily determine the travel time between predetermined points from the relationship between pressure data and time at any plurality of points. , you can understand the situation during the movement,
The object of the present invention is to obtain an electronic pressure measuring device that can easily compare and contrast water depth and travel time.

[Key points of the invention] In order to achieve the above object, a storage means capable of storing a plurality of pieces of pressure data together with time information is provided, and each time a switch is operated, the pressure data and time information at that point are sequentially stored. The key point is that a plurality of pieces of pressure data stored in the system can be sequentially switched and displayed together with their time information.

[Embodiment] An embodiment in which the electronic pressure measuring device of the present invention is incorporated into an electronic wristwatch will be described below with reference to the drawings.

First, the basic clock circuit includes an oscillator 1 that generates a reference clock signal, a frequency divider circuit 2 that divides the frequency of the reference clock signal generated from the oscillator 1 to obtain a 1Hz signal, and a frequency divider circuit 2 that generates a 1Hz signal. The clock count circuit 3 obtains time information by counting 1Hz signals, and the hour and minute time information obtained by the clock count circuit 3 is sent to the time display section of the display device 5 via a display switching circuit 4. 5c and displayed.

The pressure measuring device also includes a sensor 6 that detects the magnitude of pressure, and a detection signal from this sensor 6 is converted into a digital signal via an A/D (analog/digital) converter 7, and a latch 8 detects the pressure. It is latched sequentially as data. The pressure data from this latch 8 is displayed as current pressure data _A1 on the pressure display section 5a via the display switching circuit 9 and the unit converter 10.

The pressure data from the latch 8 is the pressure data area 1 of the RAM (random access memory) 11.
When a write signal from the AND gate 13 is applied, the data is written to the specified address of the address counter 12 among the addresses 1a. At the same time, time data from the counting circuit 3 is also written to the time data area 11b at the same address. The RAM 11 to which this writing is performed has storage areas numbered 1 to 5, and can store up to five pressures at any given time. The pressure data and time data read from this RAM 11 are stored in the display switching circuit 9 as stored pressure data A ₂ and stored time data T ₂ .
is displayed on the pressure display section 5a and the time display section 5c via the unit converter 10 and display switching circuit 4.

In Fig. 1, _S1 is the mode for writing pressure data to RAM11, and the mode for writing pressure data to RAM11.
This is a read/write changeover switch that switches between reading and writing modes.When this read/write changeover switch _S1 is turned on, one pulse is given from the one shot circuit 14 to the TFF (trigger flip-flop) 15, and its Q output and output can be inverted. and the Q output of TFF15 is “1” (binary level).
When the output is "1", the read mode is entered, and when the output is "1", the write mode is entered. Also,
The Q output of the TFF 15 is given to one input terminal of the AND gate 16, and when the Q output is "1", the switch _S1 is operated, and the above one shot circuit 1
When one pulse is output from 4, this output is applied as a clear signal to the RAM 11 via the AND gate 16, and is also applied to the address counter 12 of the RAM 11 as a clear signal. Further, the output is given to one input terminal of the AND gate 13.

S ₂ is a set switch that stores up to five pressure values at that time when turned on in the write mode, and displays the stored pressure values in _sequence in the read mode. One pulse is given to the address counter 12, and the RAM 11
The designated address is incremented and one pulse is also given to the one shot circuit 18, and the one pulse output of this one shot circuit 18 is given to the RAM 11 as a write signal via the AND gate 13 in the write mode.

_S3 is a maximum and minimum value measuring switch for measuring the maximum and minimum values of pressure within a certain period of time from the _first turn on to the next turn on.
One pulse is given to , and its Q output is "1"
Each can be inverted to "0" (low state of binary logic level), and when this Q output becomes "1", the "1" output sends an operation command signal to the minimum value comparator 21 and maximum comparator 22. given as.

_S4 is a time set switch for setting the time when pressure measurement is to be performed at the current time or a desired time.When this switch _S4 is turned on, one pulse is given from the one shot circuit 23 to the setting circuit 24, and this setting Measurement time area 25b of the counting circuit 3 and measurement register 25 from the circuit 24
A correction signal is given to the measurement time, and the measurement time is set.

S ₅ displays the contents of the display device 5 as the current time and pressure (a mode), the time at which the set switch S ₂ was operated and the pressure at that time (b mode), the measurement time and the pressure at that time (c mode), This is a display changeover switch that switches between the maximum pressure and the current time (d mode) and the minimum pressure and the current time (e mode). When this switch _S5 is turned on, a single pulse is sent from the one shot circuit 26 to the circulation type counter 27. The display switching signals a to e are sequentially output to the display switching circuits 9 and 4, data is selected, and display switching is performed. This switching signal a
The switching signals a and c of -e are also applied to the setting circuit 24, and the switching of the output of the correction signal is controlled when setting the time.

_S6 is a unit changeover switch that switches the pressure values displayed on the pressure display section 5a and unit display section 5b of the display device 5 into water depth (m), water pressure (Kg/cm ² ), and altitude (m). When this switch _S6 is turned on, one pulse is given from the one-shot circuit 28 to the ternary circulation type counter 29, and unit switching signals of 0 to 2 are sequentially output to the unit converter 10, and the pressure data is converted into water depth, water pressure, The altitude is converted into the corresponding numerical data and displayed on the pressure display section 15a, and the same unit switching signal is also output to the unit display section 5b of the display device 5 to display the corresponding units of m and Kg/ ^cm2. It will be done.

Measurement time area 25b of the measurement register 25
The measurement time data T ₃ preset in 2 is given to the matching circuit 30 together with the current time data from the counting circuit 3. When the current time matches the measurement time, the matching circuit 30 outputs a matching signal and the AND gate 31 is applied as an opening signal to the latch 8, and the pressure data from the latch 8 is applied to the pressure area 25 of the measurement register 25 via the opened AND gate 31.
preset to a. This timer register 25
Pressure data A ₃ and time data T ₃ from the above are also displayed on the pressure display section 5a and the time display section 5c via the display switching circuits 9, 4, etc.

The maximum value comparator 22, which is driven when the maximum and minimum value measuring switch _S3 is turned on, receives the maximum pressure data _A4 from the maximum pressure area 32a of the maximum value register 32, and the current pressure data from the latch 8.
When the current pressure data _A1 becomes larger than the maximum pressure data _A4 , _the maximum value comparator 22 outputs a rewrite signal and the AND gate 33,
34 as an opening signal. The pressure data from the latch 8 and the time data from the counting circuit 3 are transferred to the maximum pressure area 32a of the maximum value register 32 through the opened AND gates 33 and 34.
and maximum time area 32b, respectively. The maximum pressure data A ₄ and maximum time data T ₄ from the maximum value register 32 are also displayed on the display device 19 via the display switching circuits 9, 4, etc.

The minimum value comparator 21, which is driven when the maximum/minimum value measuring switch _S3 is turned on, receives the minimum pressure data _A5 from the minimum pressure area 35a of the minimum value register 35, and the current pressure data from the latch 8.
When the current pressure data _A1 becomes larger than the minimum pressure data _A5 , _the minimum value comparator 21 outputs a rewrite signal and the AND gate 36,
37 as an opening signal. The pressure data from the latch 8 and the time data from the counting circuit 3 are transferred to the minimum pressure area 35a of the minimum value register 35 through the opened AND gates 36 and 37.
and the minimum time area 35b, respectively. The minimum pressure data A ₅ and minimum time data T ₅ from the minimum value register 35 are also displayed on the display device 5 via the display switching circuits 9, 4, etc.

Next, the operation of this embodiment will be described.

Now, assume that the electronic pressure measuring device of this embodiment is used as a depth gauge during diving. First, turn on the unit changeover switch _S6 to output a unit changeover signal of "0" from the counter 29, and then
Change the display of b to "m" display, and press the display changeover switch S ₅
is turned on, the counter 27 switches the display switching circuit 9,
4 to output the display switching signal a. Then, the current pressure data _A1 , which is latched from the sensor 6 to the latch 8 via the A/D converter 7, is converted to water depth data by the unit converter 10 via the display switching circuit 9, and is displayed on the pressure display section 5a. be done. At the same time, the current time data _T1 from the counting circuit 3 is also displayed on the time display section 5c via the display switching circuit 4.
In this way, as shown in FIG. 2a, the current time and the pressure indicated by the water depth display are displayed moment by moment on the display device 5.

Therefore, when diving and measuring and memorizing the water depth at a predetermined point, the first step is to turn on the read/write switch.
Turn on _S1 to output one pulse from the one-shot circuit 14 to the address counter 12, clearing the address counter 12 to "0", and
When the Q output of TFF15 becomes "1", the above one pulse is sent through the AND gate 16 which is opened.
It also outputs to RAM11 and clears the contents of RAM11. At the same time, one pulse from the one-shot circuit 14 is also given to TFF15, and the Q output of TFF15 is inverted to "1", and the AND gate 1
3 to one input terminal.

In this state, for example, if you turn on the set switch _S2 at a depth of 7.5 m, the one shot circuit 17
One pulse is added to the address counter 12 from then on, and its contents are incremented by +1. Also, a write signal is given to the RAM 11 via the one-shot circuits 17 and 18 and the AND gate 13, and the pressure data corresponding to a water depth of 7.5 m from the latch 8 and the 3:10 p.m. The area 11a, 1 with the address "1" and the time data of the minute
1b. Then, if you operate the set switch _S2 further, the address counter 12
is incremented, a write signal is given to the RAM 11, and data is sequentially written from the next address onwards in the RAM 11, and up to five pieces of data can be stored.

To read and display the data set in this RAM 11, turn on the read/write switch _S1 again and the one shot circuit 14 will read out the data set in the RAM 11 and display it.
One pulse is applied to the output, the output is inverted to "0", the AND gate 13 is closed, and the write signal is
It is switched to the read state so that it is not applied to the RAM 11. And display changeover switch _S5
Turn on the display switching circuits 9 and 4 from the counter 27.
outputs the display switching signal b. Then, when the set switch S ₂ is turned on, the display switching circuit 9 displays the memory pressure data A ₂ indicating the pressure corresponding to a water depth of 7.5 meters read from address 1 of the RAM 11 and the memory time data T ₂ indicating 3:10 p.m. 4 and the like on the display device 5 as shown in FIG. 2b. Further, when the set switch _S2 is turned on, the address counter 12 is incremented, so that the memory pressure data _A2 and the memory time data _T2 of each address are switched and displayed one after another.

In this way, pressure data and time data that have been memorized can be recalled and displayed at any time, eliminating the need to memorize them or write them down in a notebook.

In addition, in order to automatically memorize the pressure data at a preset time, turn on the display changeover switch _S5 in advance, give the display changeover signal c from the counter 27 to the display changeover circuits 9 and 4, and display the measurement on the display device 5. Measurement time area 25b of register 25
, and then turn on the time set switch _S4 to apply a correction signal from the setting circuit 24 to the measurement time area 25b to preset a desired time, for example, 3:00 p.m. Then, this preset measurement time data _T3 of 3:00 pm is given to the coincidence circuit 30, and this coincidence circuit 30 has a counting circuit 3.
Since the current time data from the latch 8 is also given, when the current time coincides with 3:00 p.m., a coincidence signal is given to the AND gate 31 to open it, and the pressure data from the latch 8 at that time, for example, even if it is a pressure corresponding to a depth of 8 meters. The data is written in the pressure area 25a. In this way, pressure data at the measurement time can also be stored.

In order to read out and display this pressure data _A3 , the display changeover switch _S5 is turned on and a display changeover signal c is applied from the counter 27 to the display changeover circuits 9 and 4.
This allows the pressure data from the measurement register 25 to be
A ₃ and time data T ₃ are selectively outputted to the display device 5, and the timer time of 3:00 pm and the pressure at that time of 8.0 m are displayed as shown in FIG. 2c.

Furthermore, in order to automatically memorize the maximum pressure data and minimum pressure data within a certain period of time, first turn on the maximum and minimum value measurement switch _S3 at the beginning of the time to be measured, and then
The Q output of the TFF 20 is set to "1", and the minimum value comparator 21 and maximum value comparator 22 are operated. Then, the maximum value comparator 22 receives the pressure data from the maximum pressure area 32a of the maximum value register 32.
Start comparing A ₄ and the current pressure data A ₁ from latch 8, and if the current pressure data A ₁ is greater, then
A write signal is given to the AND gates 33 and 34 to open them, and the current pressure data A ₁ and current time data T ₁ at that time are written into the maximum value register 32.
In this way, if the current pressure data _A1 is still larger than the maximum pressure data _A4 previously written in the maximum value register 32, the larger pressure data is rewritten as the new maximum pressure data _A4 .

At the same time, the current pressure data A ₁ is also transferred between the minimum value comparator 21 and the minimum value register 35
If it is still smaller than the minimum pressure data _A5 previously written in the minimum value register 35, the smaller pressure data is rewritten as the new minimum pressure data _A5 .

Then, when the maximum/minimum value measurement switch _S3 is turned on again, the Q output of the TFF 20 becomes "0", so the comparison operations of the maximum value comparator 22 and the minimum value comparator 21 are stopped.

This maximum pressure data A ₄ and minimum pressure data A ₅
To read out and display , the display changeover switch S ₅ is turned on, and the counter 27 applies display changeover signals d and e to the display changeover circuits 9 and 4. When the signal d is given, the maximum pressure data A ₄ and the maximum time data T ₄ from the maximum value register 32 are selectively outputted to the display device 5, so that the maximum pressure is displayed as shown in d of FIG. The water depth value of 15 meters and the time when this maximum pressure was recorded, 2:38 p.m., are displayed. If the signal e is given, 0 m indicating the minimum pressure and the current time of 2:00 pm will be displayed in the same way as shown in e of FIG.

In this case, _the water pressure (Kg/
cm ² ) display, and can also be switched to altitude (m) display during mountain climbing or flight.

In the above embodiment, the pressure data to be stored is the one when the set switch _S2 is turned on, the one at the measurement time, and the maximum pressure and minimum pressure within a certain period of time. The average pressure may be stored by sampling and storing it at regular intervals and then dividing by the number of sampling times, or pressures having various other meanings may be stored.

In addition to water pressure and atmospheric pressure, the pressure to be measured is wind pressure,
It may also be water flow pressure, etc.

[Effects of the invention] As described above, the present invention makes it possible to easily memorize the water depth and arrival time of multiple points during a dive, so not only can the travel time between those points be known, but also the time of the journey. It allows you to easily compare and contrast water depth and travel time, and provides information on how long it will take to travel from a given point depending on the water pressure. Also, if you have stored multiple pieces of pressure data and you no longer know which pressure data corresponds to which point, for example, if you remember which point you were at at what time, you can From the time information, it is possible to know from which point the corresponding pressure data is the pressure data.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall circuit diagram of an electronic pressure measuring device, and Fig. 2 is a diagram of the electronic pressure measuring device, which is switched on and displayed on the display device 19 by sequentially turning on the display changeover switch _S5 . It is a figure showing an example of contents. 3... Counting circuit, 5... Display device, 5a...
...Pressure display section, 5b ... Unit display section, 6 ... Sensor, 11 ... RAM (random access memory), 21 ... Minimum value comparator, 22 ... Maximum value comparator, 25 ... Measurement register, 30 ... Matching circuit, 32 ... Maximum value register, 35 ... Minimum value register, S ₁ ... Read/write switch, S ₂ ... Set switch, S ₃ ... Maximum and minimum value measurement switch,
_S4 ...Time set switch, _S5 ...Display changeover switch, _S6 ...Unit changeover switch.

Claims (1)

[Scope of Claim for Utility Model Registration] Timekeeping means for obtaining current time information by counting reference clock signals, pressure data generation means for detecting pressure and outputting pressure data according to the pressure, and from this pressure data generation means Display means for displaying pressure data to be output; Storage means having a plurality of storage areas for storing pressure data and time information; Operation switch means; Each time a switch operation by the operation switch means is performed, the storage means is storage control means for sequentially storing pressure data output from the pressure data generation means and time information obtained by the time measurement means in respective storage areas; An electronic pressure measuring device comprising: display control means for simultaneously and sequentially switching and displaying pressure data and time information stored in the computer.