JPH0731256B2 - Electronic device with pressure sensor - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to an electronic device with a pressure sensor used as an altimeter or a depth gauge.

[Conventional example and its problems] Conventionally, a small electronic device has been proposed that measures atmospheric pressure or water pressure using a pressure sensor, obtains a vertical distance, that is, altitude or water depth from the measurement result, and displays it. ing.

However, this kind only displays the altitude or water depth at the measuring point, for example during mountain climbing or skin diving, already climbing to the target altitude (generally the summit altitude) or the target water depth or Information such as whether or not the player is diving, that is, the achievement rate is not displayed, and in order to obtain it for pace distribution or the like, the user needs to calculate from the displayed current altitude and the target altitude.

[Object of the Invention] The present invention has been made in view of the circumstances as described above, and in order to eliminate the effort of calculating the achievement rate described above, the achievement rate for a target altitude or water depth is automatically calculated by a simple operation. It is an object of the present invention to provide an electronic device with a pressure sensor having a function of displaying as.

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention calculates the vertical distance calculating means using a pressure sensor, a storage means for storing the vertical distance of a target point, and the vertical distance calculating means. The gist is that the achievement rate calculated by displaying the achievement rate calculated from the vertical distance of the local point and the vertical distance of the target point from the storage means is provided.

[Embodiment] The present invention will be specifically described below based on an embodiment shown in the drawings. In this embodiment, the present invention is applied to a so-called analog / digital electronic wrist watch with a pressure sensor (the time is displayed in a digit as well as a pointer).

Structure FIG. 2 is an external view of this embodiment. Reference numeral 1 in the figure is a watch case, and a pressure sensor 2 is provided in the watch case 1. In this case, a circular opening is formed in the lower portion of the upper surface of the watch case 1, and the circular opening is attached to the upper surface of the pressure sensor 2 so as to be exposed. A display unit 3 having hands and a liquid crystal display device 4 is arranged on the front surface of the watch case 1, and the liquid crystal display device 4 displays time, altitude, water depth, the achievement rate, and the like. Further, the present embodiment, push button switches shown in S ₄ from S ₁ is provided in addition to crown switch S _5.

FIG. 1 is a block circuit diagram of this embodiment. In the figure, reference numeral 6 is an oscillator circuit, and this output is frequency-divided by a frequency divider circuit 7 into a 1 P / S signal, which is then given to an AND gate 14, a time counting circuit 8 and a step motor drive circuit 9. The step motor drive circuit 9 receives the 1P / S signal, drives the step motor 10, and the rotational force of the step motor 10 moves the pointer 12 via the train wheel mechanism 11. The time counting circuit 8 has a second, minute and hour counter, counts the 1P / S signal and supplies time information to the CPU 21.

The CPU 21 is a circuit that executes various processes according to a microprogram stored in advance based on a switch input signal from the switch unit 17, and when switching from the time display mode to the pressure gauge mode (this embodiment is The liquid crystal display device 4 has two modes, a time display mode for displaying time data and a pressure gauge mode that functions as a pressure gauge.), And sends a signal a to the RS flip-flop 13.
By setting this, the AND gate 14 is opened,
The 1P / S signal from the frequency dividing circuit 7 is introduced as a timing signal for pressure measurement, and conversely, when switching from the pressure gauge mode to the clock mode, the signal b is sent to the RS flip-flop 13 and this is sent. And gate by resetting
14 is closed and the above 1P / S signal input is prohibited. Also, C
The PU 21 sends the operation command signal c to the pressure sensor 2 and the analog-digital conversion circuit 15 in synchronization with the introduced 1 P / S signal to operate them, and at this time, the pressure sensor 2 is installed by this device. The analog / digital conversion circuit 15 detects the pressure (atmospheric pressure or water pressure) at the specified point.
Converts this detected pressure into a digital value in kg / cm ² and sends it to the CPU 21. In this embodiment, when the digital amount is 1.033 kg / cm ² (1 atm) or less, it automatically functions as an altimeter, and when it is 1.033 kg / cm ² or more, it automatically functions as a water pressure meter. To do.

The RAM 20 is for writing / reading data under the control of the CPU 21, and has various registers described later. The buzzer circuit 19 is a circuit that emits a buzzer sound under the control of the CPU 21 when a preset high temperature difference or water depth difference is detected. The liquid crystal display device 4 is a device for displaying the data sent from the CPU 21, and displays the current time in the time display mode, while displaying the altitude, the water depth, the achievement rate, etc. in the pressure gauge mode.

FIG. 3 shows the main structure of the RAM 20. The register P is a register that stores the pressure (atmospheric pressure or water pressure) measured at each measurement timing in the pressure gauge mode, and the register P ₀ is a point serving as a reference of altitude or water depth (hereinafter referred to as a reference point). The register P ₁ is a register for storing the pressure at, and the register P ₁ is a register for storing the relative altitude or water depth (hereinafter, referred to as relative altitude or relative water depth) of the local point with respect to the reference point. The memory AL is a register that sets a certain altitude or water depth (hereinafter referred to as an ascent / descent alarm distance) so that a buzzer sounds when a certain altitude or water depth change occurs. The register P ₂ is a register that stores the relative altitude or the like (relative altitude or relative water depth) at that point each time there is a change in the altitude or water depth by only the above-described elevation alarm distance. The memory TM is a memory that memorizes the elapsed time from the time when the measurement of altitude etc. is started, and the register X is a target relative altitude (for example, the height from the above-mentioned reference point to the summit when climbing a mountain). ) Or a target relative water depth (for example, the depth to the seabed during skin diving). The values set in the memory or register are in units of kg / cm ² when the pressure is used and m when the distance is used.

Mode flag M is erected when the pressure gauge mode, a flag is lowered when the time display mode, the flag F _P
Is a flag that is set when the present embodiment functions as a depth gauge in the pressure gauge mode and is lowered when it functions as an altimeter. The state counter N is a ternary counter, and when the value is 0, a measurement state for displaying measurement data such as atmospheric pressure and water pressure is designated on the liquid crystal display device 4, and when 1 is a constant value such as achievement rate. Specify the memo display state to display the processed data, and when it is 2, target relative altitude (target relative altitude or target relative water depth)
Specify the set state to set. Further, the display counter A designates the data type to be displayed in the measurement state (that is, when the state counter N is 0), and the display counter B is displayed in the memo display state (that is, when the state counter N is 1). The display counter C specifies the settable data type in the set state (that is, when the state counter N is 2).

Operation Next, the operation of this embodiment will be described. FIG. 4 is a general flow chart showing the outline of the operation. That is,
It is determined whether or not there is a switch input from the switch unit 17 or a 1P / S signal which is a timing signal for pressure measurement (step S1). If neither is present, a display process for displaying time on the liquid crystal display device 4 (step S3). ) Is executed, and the process returns to step S1. However, if the switch input is detected in step S1, the corresponding switch process (step S2) is executed, and if the 1P / S signal is detected, the measurement process for measuring atmospheric pressure or water pressure ( Step
S4) is executed and then the measured data etc. are displayed on the liquid crystal display device 4.
The display processing (step S3) displayed in step S3 is performed and the process returns to step S1.

FIGS. 5, 6, and 7 are flowcharts showing the above switch processing (step S2), measurement processing (step S4), and display processing (step S3) in detail, and FIG. 7 shows a transition of display on the liquid crystal display device 4 accompanying a switch operation. The operation when each switch is operated will be described below.

(1) Operation at the time of initial operation It is assumed that the liquid crystal display device 4 is in the time display mode as shown in FIG. 8A and the current time (10:58:59) is displayed. Here, when operating the push button switch S _3, and detects that a switch input in step S1 of FIG. 4, the switch processing i.e. the fifth step S2
Enters the flow chart of FIG, the switch input is detected that is by push button switch S ₃ at step S10, to confirm that it is still time display mode (step S11), and sets a mode flag M thereon Switch to pressure gauge mode (step S12). The operation command signal c is sent to the pressure sensor 2 and the analog / digital conversion circuit 15.
Is sent, the pressure at the local point is measured, and this is set in the register P ₀ as the initial pressure, that is, the pressure at the reference point (step S13). Further, the signal a is issued, the RS flip-flop 13 is set, and the introduction of the 1P / S signal which is the pressure measurement timing signal is started (step S14). Further, the state counter N is set to 0 to specify the measurement state, and the display counter A is set to 0 to specify the relative altitude display state (the state displaying the relative altitude or the relative water depth) (step S15). That is, when the time display mode is switched to the pressure gauge mode, the relative altitude display state of the measurement state is automatically designated. Then step S1
At 6, the register P ₂ and the memory TM are initialized.

After the above switch processing (step S2 in FIG. 4), the display processing (step S3 in FIG. 4, that is, the flowchart in FIG. 7) is started, and it is confirmed that the pressure gauge mode is already set (step D1). Then, it is confirmed that the measurement state is designated (step D3), and further that the relative altitude display state is designated (step D4), and the contents of the register P ₁ , that is, the relative altitude and the like are displayed on the liquid crystal. Display device 4
Is displayed on the screen (step D5). However, in this case, since the initial operation is in progress at the reference point, there is still no difference in altitude or water depth, and the relative altitude is 0. Then step D6
Then, the process of blinking the triangular mark on the right end portion of the display panel of the liquid crystal display device 4 is performed, and it is displayed that the measurement state is set.

After the above processing, the set state is set in order to set the target relative altitude or the target relative water depth.
As shown in the figure, the push button switch S ₂ is operated. At this time, the operation is detected in step S32 of FIG. 5, the state counter N is set to 2 (step S33), the set state is designated by this, and the display counter C is set to 0 (step S34). ), This specifies the target relative altitude set state. That is, when the measurement state is switched to the set state, the target altitude set state is set. Next, enter the display process (flowchart in FIG. 7), step D3
After going through step 1 and D32, the process goes to step D33, where a triangle mark is lit on the right end of the display panel of the liquid crystal display device 4, and SE is placed above it.
It is shown that the process of displaying the letter T is performed and the set state is set (see FIG. 8 (h)).

Here, the push button switch S ₁ designates a digit and the push button switch S ₄ designates a numerical value of the designated digit (by a so-called set-and-select method) to set a target relative altitude or a target relative water depth. However, at this time, in step S55, after confirming that the target relative altitude is set, the process proceeds to step S56, and the process of setting the target relative altitude and the like related to the setting operation in the register X is executed. Then, in the subsequent display processing, the target relative altitude set in the register X is displayed on the liquid crystal display device 4 (step D32). For example, if 300 m is set as the target relative altitude, the liquid crystal display device 4 will be
A display as shown in FIG.

Next, the elevation alarm set state is set in order to set the elevation alarm distance, and in this case, the push button switch S ₂ is operated as shown in FIG. At this time, the operation is detected in step S50, and an increment process for incrementing the display counter C by 1 is executed to change the value from 0 to 1, whereby the up / down alarm is set (step S51). After that, it is confirmed that the value of the display counter C is not 2 (step S52), the display processing is started, and it is further confirmed that the value of the display counter C is 1 in step D31.
After that, in step D35, the aforementioned triangular mark is lit up and the characters of SET are displayed.

Here, although the lift alarm distance is set by the set-and-select method of operating the push button switches S ₁ and S ₄ ,
In this case, since the value of the display counter C has already become 1, the process proceeds from step S55 to step S57, and the raising / lowering alarm setting process of writing the set value in the memory AL is executed. Then, after that, the display processing is started, and the set up / down alarm distance and the like are displayed (steps D34 and D35).

After the above initial setting is completed, the set state is returned to the measurement state. In this case, the push button switch S ₂ is operated as shown in FIG. At this time, the operation is performed in step S50.
In step S51, the display counter C is incremented by 1 and the value is set to 2 (step S51). After step S52, the process proceeds to step S53 to set the state counter N to 0 to set the measurement state. After that, display processing starts,
At step D3, it is confirmed that the measurement state has already been reached, and after steps D4 and D5, the process proceeds to step D6, where the above-mentioned triangular mark blinks and the display state before switching to the set state is restored.

With the above initial operations, the setting of basic data for calculating the achievement rate etc. is completed, and it can be used as an altimeter or water depth gauge.

(2) Measurement operation When the transfer of the measurement point is started in the above-mentioned state, that is, when the device is carried and the mountain climbing or the skin diving is started, the measurement process is executed every one second (step S4). And the following operation is performed in the display process (step S3). That is, first, the operation command signal c is sent to the pressure sensor 2 and the analog-digital conversion circuit 15,
These are operated to measure the momentary pressure (atmospheric pressure or water pressure), and the measurement result, that is, the pressure at the site point is set in the register P (step M1).
And the pressure set in this register P is 1.033 kg / cm ²
It is determined whether the pressure is lower or higher than (1 atm), and it is determined whether this device is currently used as an altimeter or a water depth meter (step M2). When the value of the register P is 1.03 or less and it is determined that the register P is used as an altimeter, the flag F _P is lowered (step M3) and the process proceeds to step M4. This step M4
Then, the value of the register P and the atmospheric pressure of the reference point previously set in the register P ₀ are read out, the calculation according to the following formula is executed, and the height from the reference point to the local point is calculated. ,
That is, the process of obtaining the relative altitude and storing it in the register P ₁ is performed.

Relative altitude (m) = 18410.0 × (log1013.25-logP ′) where P ′ = 9.80665 × 10 ² × (A + 1.033−B) A = Atmospheric pressure at the local point (kg / cm ² ) B = Atmospheric pressure at the reference point (Kg / cm ² ) On the other hand, if it is determined in step M2 that the water gauge is used as a depth gauge, a flag F _P is set (step M5), and the process proceeds to step M6. In this step M6, the value of the register P and the value of the register P ₀ are read out, the calculation according to the following formula is executed to obtain the depth from the reference point to the local point, that is, the relative water depth, and this is registered in the register. Processing for storing in P ₁ is performed.

However, A = water pressure at the local point (kg / cm ² ), B = water pressure at the reference point (kg / cm ² ), step M4 is the step M7 after the process of M6 is completed.
Then, the fact that one second has elapsed from the previous measurement timing is recorded in the memory TM, and the routine proceeds to step M8. In step M8, whether there was a further movement up or down the alarm distance from when there was an up / down alarm (buzzer sound), that is, ascent / descent only for the elevation alarm distance (when used as an altimeter) or diving / floating ( If it is used as a water depth gauge), it is determined. If there is such a movement, whether it is due to climbing or diving (that is, movement away from the reference point) or descending or ascent (that is, movement toward the reference point). Judged (Step M1
9). In the case of climbing or diving, the value of the register P ₂ is updated with a value obtained by adding the ascent / descent alarm distance to the value so far (step M12), and then the buzzer circuit 19 for notifying that such a movement has occurred. A raising / lowering alarm process for generating the sound A is executed (step M13). On the other hand, if it is determined in step M19 that the movement is due to descending or ascending, the value of the register P ₂ is updated with the value obtained by subtracting the ascent / descent alarm distance from the value so far (step M10), Buzzer circuit to notify that there was a move
An up / down alarm process that causes the sound B to be generated at 19 is executed (step M11).

After the above process, the display process is started, and the process proceeds to Step D5 through Steps D3 and 4 to display the relative altitude or the relative water depth of the local point set in the register P ₁ on the liquid crystal display device 4, and further Processing for blinking the triangular mark is performed (step D6). FIG. 8B is a display example at this time.

(3) In the condition of displaying altitude display changes in measurement condition relative, when operating the push button switch S _4, as shown in FIG. 8, the absolute height is displayed.

At this time, the above-described operation is detected in step S22, and the increment processing for incrementing the display counter A by 1 is executed (step S23), and the value is set to 1. Then, after confirming that the value of the display counter A is 1 in step S24, it is determined in step S25 whether or not this device is currently used as a depth gauge. When it is used as an altimeter instead of as a depth gauge, it is confirmed in step S27 that the value of the display counter A has not reached 3, and the display processing is started. Further, in step S25, when it is used as a depth gauge, the value of the display counter A is set to 0.
Therefore, forcibly set to 2 and avoid setting to 1. That is, when used as a depth gauge, the absolute depth is not displayed.

It is judged that it is used as an altimeter, and the display counter A
When the display value is maintained with the value of 1 being detected, it is detected in step D4 and the process proceeds to step D7, where the absolute pressure at that point (above sea level) is calculated from the atmospheric pressure at the local point stored in the register P.
Is calculated, then the calculation result is displayed on the liquid crystal display device 4 (step D8), and the above-mentioned blinking process of the triangular mark is performed (step D9). For example, when the sea level at the local point is 1681 meters, the display is as shown in FIG. 8 (c).

Next, the operation of displaying the local pressure on the liquid crystal display device 4 will be described. At this time, as shown in FIG. 8, the push button switch S ₄ is further operated in the display state of the absolute altitude. In this case, perform the operation in step S2.
In step S23, the display counter A is incremented by 1 (step S23).
After 24, the process proceeds to step S27. Further, as described above, when used as a water depth meter, the value of the display counter A does not become 1 but the display counter A is 0 and the push button switch S ₄ is pressed while the relative water depth is being displayed. The display counter A becomes 2 only by operating once. Step S27
Leading to. As described above, when the display counter A is set to 2 and the process reaches step S27, the display process is started in any case, and the process proceeds from step D4 to step D10. Then, in this step D10, it is judged whether it is used as an altimeter or a water depth meter, and when it is used as an altimeter, the pressure at the local point set in the register P is set in millibar (mb). A process for converting to atmospheric pressure is performed, the result is displayed on the liquid crystal display device 4 (steps D11 and D12), and further, the process for blinking the above-mentioned triangular mark on the right end of the liquid crystal display device 4 is executed ( Step D15). FIG. 8 (d) shows a display example at this time. On the other hand, when used as a depth gauge,
The water pressure (kg / cm ² ) set in the register P is displayed on the liquid crystal display device 4 (step D14), and the triangular mark blinks (step D15).

Such as described above, in the state of the pressure display, operating the pushbutton switch S _4, as shown in FIG. 8, returns to the display state of the relative altitude and the like. In this case, detects the operation of the push button switch S ₄ in step S22, executes the increment processing of +1 to the display counter A, and 3 the value of the display counter A (step S23), step S28 through steps S24, S27 Then, the value of the display counter A is set to 0. After that, the display processing is started, and the process proceeds to steps D4, D5, D6, and the relative altitude and the like and the triangular mark are displayed in blinking.

As described above, in the measurement state, each time the push button switch S ₄ is operated, the measurement data at the local point is sequentially and cyclically displayed on the liquid crystal display device 4.

(4) Switching to memo display state When climbing or diving (that is, except when descending or ascending)
In the memo display state in which the effective information is provided, it is possible to switch only from the above-mentioned measurement state, and this switching is performed by operating the push button switch S ₁ as shown in FIG. In this case, the operation is detected in step S30, the state counter N is set to 1 (step S31), and then the process proceeds to the display process. Then, in step D20, after confirming that the value of the state counter N has already become 1, the process proceeds to step D21 and is distributed to various processes according to the value of the display counter B. Now, by the previous process. If the display counter B is set to 0, the step
Proceed to D22, divide the value of register P _{1 by} the value of register X, and multiply the result by 100 to obtain the achievement rate that indicates what percentage of the target altitude or water depth is currently reached. , This is displayed on the liquid crystal display device 4 (step D2
3) Then, the triangle mark is turned on (step D24). FIG. 8 (e) is a display example in this case.

(5) Display change in memo display state If the push button switch S ₄ is operated in the above-mentioned state, that is, in the state where the achievement rate is displayed on the liquid crystal display device 4, as shown in FIG. Liquid crystal display 4
Is displayed in. In this case, the operation is detected in step S41, the value of the display counter B is set to 1 (step S42), it is confirmed in step D21, and the process proceeds to step D25. In this step, the remaining altitude etc. is calculated by subtracting the relative altitude of the local point set in the register P ₁ from the target relative altitude etc. set in the register X. Next, the calculation result is displayed and the triangular mark is lit up (steps D26 and D27). FIG. 8 (f) is a display example in this case, and displays that the remaining altitude is 227 meters.

In the above display state, the push button switch S ₄
When is operated, the estimated arrival time is displayed on the liquid crystal display device 4, as shown in FIG. In this case, the operation is detected in step S41, the value of the display counter B is set to 2 (step S42), and the display process is started via step S43.
It is detected at D21 that the value of the display counter B is already 2, and the process proceeds to step D28. In this step, register the value of P ₁ divided by the value of the memory TM, until it calculates the average speed of the register P ₁ from the value of register X
Calculate the remaining altitude etc. by subtracting the value of and dividing the latter by the former,
The time required to climb (or dive) the remaining altitude is calculated and added to the current time from the time counting circuit 8 to obtain the estimated arrival time. Then, the estimated time of arrival and the lighting of the triangular mark are displayed (step D2).
6, D27). FIG. 8 (g) shows a display example in this case.
It shows that the estimated arrival time is 1:18.

In the above display state, the push button switch S ₄
When is operated, the display returns to the achievement rate display as shown in FIG. In this case, the operation is detected in step S41, the value of the display counter B is set to 3 (step S42), and it is further confirmed in step S43 that the value is 3, and then the value of the display counter B is set to 0 ( In step S44, display processing is started, and the achievement rate is calculated and displayed (steps D21 and D).
22, D23, D24).

As described above, in the memo display state, the push button switch S
Each time you operate ₄ , the achievement rate at that point, remaining altitude,
The expected arrival times are cyclically displayed on the liquid crystal display device 4 in sequence.
Is displayed in. The display data can be identified by a mark or the like indicating the unit.

(6) Switching from the memo display state to the measurement state This is performed by operating the push button switch S ₁ as shown in FIG. At this time, in step S45, the operation is detected and the state counter N is set to 0 (step S46).
Display processing is started, and display counter A is passed through steps D3 and D4.
Is assigned to various processes depending on the value of, and the result is displayed on the liquid crystal display device 4.

(7) Switching to time display mode As shown in FIG. 8, the pushbutton switch S ₃ is operated after the measurement state or the memo display state is set. In this case, in step S10, the operation is detected, it is confirmed in step S11 that the time display mode is not yet set, and further, it is confirmed that it is not in the set state, that is, in the measurement state or the memo display state ( In step S17), 0 is set in step M to set the time display mode (step S18). And R
A process for sending the signal b to the S flip-flop 13 and resetting it is carried out (step S19), and then a display process is carried out and a process for displaying the current time from the time counting circuit 8 on the liquid crystal display device 4 is executed. (Step D2).

When the switch operation is performed after switching to the time display mode, the corresponding process is performed in step S58, and the time after the process is displayed in step D2.

The present invention is not limited to the above embodiments, and various modifications can be applied without departing from the present invention.

[Effects of the Invention] As described above, the present invention has a vertical distance calculating means using a pressure sensor, a storage means for storing the vertical distance of a target point, and a field calculated by the vertical distance calculating means. The calculation means for calculating the current achievement rate from the vertical distance of the point and the vertical distance of the target point from the storage means is provided to display the calculated achievement rate. It is possible to provide an electronic device with a pressure sensor that can obtain the achievement rate at a target altitude or water depth by a simple operation.

[Brief description of drawings]

1 to 8 show an embodiment of the present invention, FIG. 1 is a block circuit diagram of this embodiment, FIG. 2 is an external view of this embodiment, and FIG. FIG. 4 is a diagram showing a partial configuration of RAM, FIG. 4 is a general flow chart showing an outline of the operation, FIG. 5 is a flow chart showing the switch process of FIG. 4 in detail, and FIG. 6 is a measurement process of FIG. 4 in detail. FIG. 7 is a flowchart showing in detail the display processing of FIG. 4, and FIG. 8 is a view showing the transition of the display accompanying the switch operation. 1 ... watch case, 2 ... pressure sensor, 3 ... display part,
4 ... Liquid crystal display device, 6 ... Oscillation circuit, 7 ... Dividing circuit, 8 ... Time counting circuit, 13 ... RS flip-flop, 14 ... AND gate, 15 ... Analog-digital conversion circuit, 17 ... Switch, 19 ... Buzzer circuit, 20 ...
... RAM, 21 ... CPU, M ... mode flag, N ... status counter, A, B, C ... display counter.

Claims (1)

[Claims] 1. A pressure sensor, a vertical distance calculating means for calculating a vertical distance from a reference point to a local point based on a pressure detected by the pressure sensor, and a storage means for storing a preset vertical distance of a target point. A calculation means for calculating the current achievement rate from the vertical distance of the local point calculated by the vertical distance calculation means and the vertical distance of the target point of the storage means, and a display for displaying the achievement rate calculated by this calculation means An electronic device with a pressure sensor, comprising: a control unit.