JPS63121779A - Electronic clock with pressure sensor - Google Patents

Abstract

PURPOSE:To calculate and display arrival forecasting time at an objective position by measuring and storing a vertical distance from a reference point and the time required for the movement by using a pressure sensor. CONSTITUTION:An oscillation frequency 6 obtained from an oscillation circuit 6 is divided into 1P/S by a frequency divider 7, a motor 10 is driven by a step motor driving circuit 9, a stylus 12 is driven, and time information is applied from time counting circuit 8 to a CPU21. The CPU21 sets a FF13 by a signal (a) on the basis of switch input from a switch part 17, opens an AND gate 14 to input the 1P/S as a manometer synchronizing signal and switches the operation mode to a clock mode by a signal (b). The pressure sensor 2 detects the pressure of the current position by a signal (c), an A/D converter 15 A/D converts the signal and the CPU21 acts as an altimeter or a depth-measuring meter based on one atmospheric pressure. Under control by the CPU21, information is written/read out in/from a RAM20, and at the time of detecting a set altitude or a set water depth difference, an alarm is generated from a buzzer 19. The vertical distance from the reference point and the time required for the movement are measured and stored by operating the switch part 17, an arrival time at an object point is calculated by the CPU21 and displayed on a liquid crystal display device 4. Consequently, a convenient clock capable of omitting user's mental calculation can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electronic timepiece with a pressure sensor that has additional functions as an altimeter and a depth meter.

[Conventional examples and their problems] Wristwatches have been proposed that have a function of measuring atmospheric pressure or water pressure with a pressure sensor, obtaining altitude or water depth from the measurement results, and displaying the results.

However, this kind of information only displays the altitude or water depth of the local point, the time required to reach the local point, etc., and the target point (for example, In order to know the expected time of arrival at the summit (when climbing a mountain), the user must calculate it by themselves using mental calculations, etc. based on the altitude of the local point and the time required to reach the local point. It was annoying and inconvenient.

[Purpose of the Invention] The present invention has been made in view of the above-mentioned circumstances, and it is possible to know the expected time of arrival at a target point by a very simple operation without requiring the user to perform mental calculations on his/her own. The present invention aims to provide an electronic timepiece with a pressure sensor that can be used.

[Key Points of the Invention] A timekeeping means for obtaining the current time, a vertical distance calculation means for calculating the vertical distance from a reference point to the local point using a pressure sensor, and a timer for calculating the vertical distance from the reference point to the local point. A measuring means for measuring time and a storage means for storing the vertical distance to a preset target point are provided, and the current time, vertical distance to the current point, time, and vertical distance to the target point from each of the above means are provided. The gist is that the estimated time of arrival at the target point is calculated based on the information and displayed.

[Example] The present invention will be specifically described below based on an example shown in the drawings. In this embodiment, the present invention is applied to an analog/digital electronic wristwatch (which displays the time digitally in addition to the hands).

Figure 2 is an external view of this embodiment. 1 in the figure is a watch case, and a pressure sensor 2 is provided in this watch case l. In this case, a circular opening is formed on the lower side of the upper surface of the watch case 1, and the pressure sensor 2 is attached to the opening so that the upper surface of the pressure sensor 2 is exposed. A display section 3 having hands and a liquid crystal display device 4 is disposed on the front surface of the watch case 1, and the liquid crystal display device 4 displays the time, altitude, water depth, the estimated time of arrival, and the like. In addition, in this example,
In addition to the crown switch S5, push button switches indicated by S1 to S4 are provided.

FIG. 1 is a block circuit diagram of this embodiment.

In the figure, 6 is an oscillation circuit, and this output is sent to the frequency dividing circuit 7 at 1'/s.
After being frequency-divided into signals, the signal is applied to an analogue gamer 14, a time counter circuit 8, and a step motor drive circuit 9. The step motor drive circuit 9 receives the IP/s signal and drives the step motor 10, and the rotational force of the step motor 10 moves the pointer 12 via the wheel train mechanism 11. The time counting circuit 8 has second, minute, and hour counters, counts the IP/s signal, and supplies time information to the CPU 21.

The CPU 21 is a circuit that executes various processes according to a pre-stored microprogram based on a switch input signal from the switch unit 17, and when switching from time display mode to pressure gauge mode (in this embodiment, It has two modes: a time display mode in which time data is displayed on the liquid crystal display device 4, and a pressure gauge mode in which it functions as a pressure gauge.), the signal a is sent to the RS flip-flop 13, and this is By setting and gate 14
The 1'/s signal from the frequency divider circuit 7 is introduced as a timing signal for pressure measurement, and conversely, when switching from pressure gauge mode to clock mode, the signal S is sent to the RS flip flop 13. By resetting this, the controller 14 is closed and the input of the 1'/s signal is prohibited. In addition, the CPU 21 is the introduced l'
In synchronization with the /s signal, the operation command signal C is sent to the pressure sensor 2 and the analog-to-digital conversion circuit 15 to operate them. (atmospheric pressure or water pressure),
The analog/digital conversion circuit 15 converts this detected pressure into k
After converting into a digital quantity with units of g/c 2, C
Send to PU21. In this example, the digital amount is 1.033 kg/c+12. (1 atm) or lower, it automatically functions as an altimeter, and vice versa.
When it is over kg/cm2, it automatically functions as a water pressure gauge.

The RAM 20 is used to write and read data under the control of the CPU 21, and is provided with various registers to be described later. The buzzer circuit 19 operates under the control of the CPU 21 when a preset altitude difference or water depth difference is detected.
This is a circuit that emits a buzzer sound. The liquid crystal display device 4 is a CP
It is a device that displays data sent from U21,
In the time display mode, the current time is displayed, while in the pressure gauge mode, the altitude, water depth, estimated time of arrival, etc. are displayed.

FIG. 3 shows the main configuration 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.

is a register that stores the pressure at a point that is a reference point for altitude or water depth (hereinafter referred to as a reference point), and register P1 is a register that stores the pressure at a point that is a reference point for altitude or water depth (hereinafter referred to as a reference point). This is a register that stores the water depth (denoted as water depth). The memory AL is a register in which a certain altitude or water depth (hereinafter referred to as elevation alarm distance) is set so that a buzzer sounds to notify you whenever there is a change in altitude or water depth. The register P2 is a register that stores the relative altitude, etc. (relative altitude or relative water depth) of the point every time there is a change in altitude or water depth by the above-mentioned elevation alarm distance. Memory TM
is a memory that stores the elapsed time from the time when measurement of altitude etc. is started moment by moment, and is a register or target relative altitude (for example, the height from the reference point to the mountaintop when climbing) or This register is used to set the target relative water depth (for example, the depth to the seabed during skin diving). The values set in the above memory or register are as follows:
For pressure, the unit is kg/c@2, and for distance, the unit is m.

The mode flag M is a flag that is set up in the pressure gauge mode and taken down in the time display mode, and the flag FP
is a flag that is set when this embodiment is functioning as a depth gauge in the pressure gauge mode, and is lowered when it is functioning as an altimeter. The status counter N is a ternary counter, and when the value is O, it specifies the measurement status to display measurement data such as atmospheric pressure and water pressure on the liquid crystal display 4, and when it is 1, it specifies the measurement status such as the expected arrival time, etc. Specify the memo display state to display the data processed, and select 2.
In this case, specify the setting state for setting the target relative altitude, etc. (target relative altitude or target relative water depth). In addition, the display counter A specifies the measurement data type to be displayed in the measurement state (that is, when the state counter N is O),
The display counter B specifies the type of data to be displayed in the memo display state (i.e., when the status counter N is 1), and the display counter C specifies the data type to be displayed in the memo display state (i.e., when the status counter N is 2). Specify species.

Operation Next, the operation of this embodiment will be explained. FIG. 4 is a general flowchart showing an outline of the operation. That is,
It is determined whether there is a switch input from the switch unit 17 or an l'/s signal which is a timing signal for pressure measurement (
Step S1), if there is none, a display process (step 33) for displaying the time on the liquid crystal display device 4 is executed, and the process returns to step S1. However, step S1
If a switch input is detected, the corresponding switch process (step 32) is executed, and if an IP/s signal is detected, a measurement process (step S4) for measuring atmospheric pressure or water pressure is executed. Display processing (step S3) is executed and then displays measurement data etc. on the liquid crystal display device 4.
) is performed and the process returns to step Sl.

5, 6, and 7 are flowcharts showing the above switch processing (step S2), measurement processing (step S4), and display processing (step S3), respectively, and FIG. It shows the transition of the display on the liquid crystal display device 4 as the switch is operated. The operation when operating each switch will be explained below.

(1) Operation at initial operation Assume that the time display mode is currently on as shown in FIG. 8(a), and the current time (10 minutes, 58 minutes, 59 seconds) is displayed on the liquid crystal display device 4. If the pushbutton switch S3 is operated here, the switch input is detected in step S1 of FIG. 4, and the switch processing of step S2, that is, the flowchart of FIG. It is detected that the button switch S3 is activated, and it is confirmed that the mode is still in the time display mode (Step 511). Thereafter, the mode flag M is set and the mode is switched to the pressure gauge mode (Step S12). and pressure sensor 2 and analog/digital conversion circuit 1
Send the operation command signal C to 5, measure the pressure at the local point,
This is set in the register Po as the initial pressure, that is, the pressure at the reference point (step 513). Further, the signal a is generated, the RS flip-flop 13 is set, and the introduction of the 1'/s signal, which is the pressure measurement timing signal, is started (step 514). Furthermore, O is added to the status counter N.
is set to designate the measurement state, and the display counter A is set to 0 to designate the relative altitude display state (a state in which relative altitude or relative water depth is displayed) l (step S15). That is, when switched from time display mode to pressure gauge mode.

The relative altitude display state of the measurement state will be automatically specified. Next, in step 316, register P2 and memory TM are initialized.

After the above switch processing (step 32 in Fig. 4), enter the display processing (step S3 in Fig. 4, that is, the flowchart in Fig. 7), and confirm that the pressure gauge mode is already in step D1). Next, confirm that the measurement state is specified (Step D3), and further confirm that the relative altitude display state is specified (Step D4), and display the contents of the register PI, that is, the relative altitude, etc. (Step D5).

However, in this case, since the initial operation at the reference point is still in progress, there is no altitude difference or water depth difference yet, and the relative altitude etc. will be 0. Thereafter, the process proceeds to step D6, where a process is performed to flash a triangular mark at the right end of the display panel of the liquid crystal display device 4, indicating that the measurement state is in progress.

After the above processing, the target relative altitude or target relative water depth is set to the set state, but in this case, the 8th
Operate the pushbutton switch S2 as shown in the figure. At this time, the operation is detected in step S32 of FIG. 5, the state counter N is set to 2 (step 533), the set state is designated, and the display counter C is set to 0 (step 534). , thereby specifying the target relative altitude set state. That is, when there is a change from the measurement state to the set state, the target relative altitude set state is entered. Next, the display process (flow chart in FIG. 7) is entered, and the process goes through steps 031 and D32 to step D33, where a triangular mark is lit at the right end of the display panel of the liquid crystal display device 4, and the characters SET are displayed above it. This shows that the processing has been performed and the set state is reached (Fig. 8 (h)
)reference).

Here, the target relative altitude or target relative depth is set by specifying a digit with the pushbutton switch S1 and specifying the numerical value of the specified digit with the pushbutton switch S4 (using the so-called set-and-select method). At this time, after confirming that the target relative altitude is set in step S55, the process proceeds to step S56, where a process of setting the target relative altitude, etc. related to the setting operation in the register X is executed. Then, in the subsequent display processing, register
The target relative altitude, etc. set in , are displayed on the liquid crystal display device 4 (step D32). For example, if 300 m is now set as the target relative altitude, a display as shown in FIG. 8(h) will be displayed on the liquid crystal display device 4.

Next, in order to set the above-mentioned lift alarm distance, the lift alarm is set, but in this case, the push button switch S2 is operated as shown in FIG. 8.At this time, the operation is detected in step S50, The display counter C is incremented by +1 to change from 0 to -l, thereby setting the up/down alarm set state (step 551).
). After that, confirm that the value of the display counter C is not 2 (step 552), and enter display processing (step 031).
Then, it is further confirmed that the value of the display counter C is 1, and after passing through step D34, in step D35, the aforementioned triangular mark is lit and the characters SET are displayed.

Here, the elevation alarm distance is set by the set-and-select method by operating the pushbutton switch Sl, 34, but in this case, since the value of the display counter C is already 1, the process advances from step S55 to step S57.
Lifting alarm setting processing is executed to write the set value into the memory AL.

Then, "display processing begins, and the set elevation alarm distance, etc. is displayed (steps D34 and D35).
.

After the above initial settings are completed, the set state is returned to the measurement state, but in this case, the push button switch S2 is operated as shown in FIG. At this time, the operation is performed in step s5.
0 is detected, the display counter C is incremented by 1, and the value is set to 2 (step 551), and the process proceeds to step 353 via step S52, where the state counter N is set to 0 and the measurement state is set. do. After that, the display process starts, and it is confirmed in step D3 that it is already in the measurement state, and then the process goes to step D through steps D4 and D5.
The process proceeds to step 6, where the triangular mark described above is decremented, and the display returns to the state before switching to the set state.

With the above initial operations, the setting of the basic data for calculating the expected time of arrival, etc. is completed, and the device is ready to be used as an altimeter or depth meter.

(2) Measurement operation If you start relocating the measurement point in the above-mentioned state, that is, if you start mountain climbing or skin diving with this device in your possession, the measurement process is executed every second (step S4). In the display process (step 33), the following operations are performed. That is, first, an operation command signal C is sent to the pressure sensor 2 and the analog/digital conversion circuit 15 to cause them to operate, and the momentary pressure (atmospheric pressure or water pressure) is
is measured and the measurement result, that is, the pressure at the current point, is set in the register P (step M
l). Then, the pressure set in this register P is 1.0
It is determined whether it is lower or higher than 33 kg/cm2 (1 atm), and from this it is determined whether this device is currently being used as an altimeter or a depth meter (Step M2 ). The value of register P is 1.0
33 or less and it is determined that it is to be used as an altimeter, the process proceeds to step M3) where the flag FP is lowered and step M4. In this step M4, the value of the register P and the atmospheric pressure at the reference point previously set in the register Po are read out, and the calculation according to the following formula is executed to calculate the distance from the reference point to the current point. A process is performed to obtain the height, that is, the relative altitude, and to store it in the register PI.

Relative altitude (m) = 18410. OX (Jlogl
O13,25-standing ogP") However, P'= 9.80E185 X 102 X (
A+1.033-B) A=Atmospheric pressure at the local point (kg/
cm B=Atmospheric pressure at the reference point (kg/c+s2) On the other hand, if it is determined in step M2 that it is being used as a water depth gauge, a flag FP is set (step M5) and the process proceeds to step M6. In this step M6, the register P
and the value of the register PG are read out, and the calculation according to the following formula is performed to obtain the depth from the reference point to the current point, that is, the relative water depth, and this is stored in the register P1.

However, A = Water pressure at the local point (kg/cm2) B = Water pressure at the reference point (kg/cm2) Above step M4
Alternatively, after the process of M6 is completed, the process proceeds to step M7, and the memory T records the fact that one second has elapsed since the previous measurement timing.
The information is recorded in M and the process proceeds to step M8. In step M8,
Whether there has been further movement by the distance of the vertical alarm (buzzer sound) since the previous vertical alarm (buzzer sound), i.e., ascent/descent by the vertical alarm distance (if used as an altimeter) or diving/surfacing (if used as a depth gauge) (if any) has occurred. If such movement occurs, it will also be determined whether the movement is due to climbing or diving (i.e. movement away from the reference point) or descent or ascent (i.e. movement towards the reference point). Determined (step M19)
. In the case of climbing or diving, the value of register P2 is updated with the value obtained by adding the vertical alarm distance to the previous value (step M12), and then the buzzer circuit 19 is activated to notify that such movement has occurred. A lifting alarm process is executed to generate sound A (step M13). On the other hand, if it is determined in step M19 that the movement is by descent or ascent, the value of register P2 is updated with a value obtained by subtracting the vertical alarm distance from the previous value (step MIO
)l, and then a lifting alarm process is executed to cause the buzzer circuit 19 to generate a B sound to notify that such movement has occurred (step Mll).

After the above processing, a display process is entered, and the process proceeds through step D3.4 to step D5, where the relative altitude or relative water depth of the current point set in the register P is displayed on the liquid crystal display device 4, and furthermore, the A process of blinking the triangular mark is performed (step D6). FIG. 8(b) is an example of the display at this time.

(3) Display change in measurement state When the pushbutton switch S4 is operated while relative altitude is being displayed, absolute altitude is displayed as shown in FIG.

At this time, the above operation is detected in step S22, and an increment process is executed to increment the display counter A by 1 (step 523), and the value is set to 1. And step S
After confirming that the value of the display counter A is 1 in step S24, it is determined in step S25 whether this device is currently being used as a depth gauge. When used as an altimeter rather than a depth gauge, step S
At step 27, it is confirmed that the value of the display counter A has not reached 3, and display processing begins. Further, in step S25, when the device is used as a water depth gauge, the value of the display counter A is forcibly changed from O to 2 to avoid setting it to 1. That is, when used as a water depth gauge, absolute water depth is not displayed.

It is determined that it is being used as an altimeter, and the display counter A
When the value of is kept at 1 and the display process is entered, step D4
Detect it, proceed to step D7, calculate the absolute altitude (above sea level) at that point from the atmospheric pressure at the point stored in register P, and then display the calculation result on the liquid crystal display device 4 (step D8). , performs the triangular mark flashing process described above (step D9). For example, the local point above sea level is 1
When the distance is 681 meters, the display will be as shown in Figure 8 (C).

Next, the operation for displaying the pressure at the current point on the liquid crystal display device 4 will be explained. At this time, as shown in FIG. 8, the push button switch S4 is further operated in the absolute altitude display state. In this case, the operation is performed in step 3.
22, the display counter A is incremented by 1 (step 523), the value is set to 2, and the process proceeds to step S27 via step 324. In addition, as mentioned above, when used as a depth gauge, the display counter A
The value of is never 1, and the display counter A is O, indicating the relative water depth. By operating the pushbutton switch S4 once, the display counter A becomes 2, and the process proceeds to step 327. When the display counter A is set to 2 as described above and step S27 is reached, the display process begins in either case, and steps D4 to D1 are executed.
Go to 0. In step 010, it is determined whether the device is being used as an altimeter or a depth meter, and if it is being used as an altimeter, the pressure at the current point set in register P is set to millibar (m b ).
A process is performed to convert the unit into atmospheric pressure, and the result is displayed on the liquid crystal display device 4 (steps D11 and D12).
), and the process of blinking the triangular mark mentioned above at the right end of the liquid crystal display device 4 is further executed (step D15). 8th
Figure (d) shows an example of the display at this time. On the other hand,
When used as a depth gauge, the water pressure (kg/cm2) set in the register P is displayed on the liquid crystal display device 4 (step D14), and the triangular mark flashes (step D15).

When the pushbutton switch S4 is operated in the pressure display state as described above, the display returns to the display state of relative altitude, etc., as shown in FIG. In this case, the operation of the pushbutton switch S4 is detected in step S22, and the display counter A is increased by +1.
Execute the increment process to set the value of display counter A to 3 (Step 523), Step 324, S27
The process then proceeds to step 328, where the value of the display counter A is set to O. After that, display processing starts and steps D4, D5, and D
6, the relative altitude, etc. is displayed and the triangular mark is displayed blinking.

As described above, in the measurement state, each time the pushbutton switch S4 is operated, the measurement data at the current point is sequentially and cyclically displayed on the liquid crystal display device 4.

(4) Switching to memo display state When climbing or diving (i.e., excluding when descending and ascending)
It is possible to switch only from the above-mentioned measurement state to the memo display state which provides effective information, and this switching is performed by operating the push button switch S+, as shown in FIG. In this case, the operation is detected in step S30, and the status counter N is set to 1 (step 531).
After that, the process proceeds to display processing. And in step D20,
After confirming that the value of the status 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. is set, proceed to step D22, divide the value of register P1 by the value of register The achievement rate indicating whether or not the child is present is obtained and displayed on the liquid crystal display device 4 (step D23), and furthermore, the triangular mark is lit (step D24). FIG. 8(e) is a display example in this case.

(5) Display change in memo display state If you operate the push button switch S4 in the above state, that is, with the achievement rate displayed on the liquid crystal display 4, the remaining altitude or remaining water depth will be displayed as shown in Fig. 8. is the liquid crystal display device 4
will be displayed. In this case, the operation is detected in step S41, and the value of display counter B is set to 1 (step 542).
, it is confirmed in step D21, and the process proceeds to step D25.

In this step, the relative altitude, etc. of the current point set in the register P1 is subtracted from the target relative altitude, etc. set in the register X, to calculate the remaining altitude, etc. Then,
The calculation results are displayed and the triangular mark is lit (steps D26 and D27). FIG. 8(f) is a display example in this case, and shows that the remaining altitude is 227 meters.

In the above display state, the pushbutton switch S4
When operated, the expected arrival time is displayed on the liquid crystal display device 4, as shown in FIG. In this case, the operation is detected in step 341, the value of the display counter B is set to 2 (step 542), and display processing is entered via step S43.
In step D21, it is detected that the value of display counter B has already reached 2, and the process proceeds to step D28. In this step, the value of register P1 is divided by the value of memory TM to calculate the average speed up to that point, and the value of register P1 is subtracted from the value of register X to calculate the remaining altitude, etc., and the latter is divided by the former. Then, the time required to climb (or descend) the remaining altitude, etc. is calculated, and this is added to the current time from the time counting circuit 8 to obtain the expected arrival time. Next, the estimated arrival time is displayed and the triangular mark lights up (
Step 026, D27). FIG. 8(g) is a display example in this case, and shows that the expected arrival time is 1:18.

In the above display state, the pushbutton switch S4
When you operate , the display returns to the achievement rate as shown in FIG. In this case, the operation is detected in step S41, the value of display counter B is set to 3 (step 542), and after confirming that it has become 3 in step S43, the value of display counter B is set to 0 ( Step 544), display processing is started, and the achievement rate is calculated and displayed (steps 021, D22, D23, D24).

As mentioned above, in the memo display state, the pushbutton switch S
Each time you operate 4, the achievement rate, remaining altitude,
The expected arrival time is displayed on the liquid crystal display 4 in sequence and cyclically.
will be displayed. It should be noted that these display data can be identified by marks or the like representing units.

(6) Switching from the memo display state to the measurement state is performed by operating the push button switch S1 as shown in FIG. At this time, in step S45, the operation is detected and the state counter N
After that, display processing is started, and through steps D3 and D4, various processing is performed according to the value of the display counter A, and the results are displayed on the liquid crystal display device 4.

(7) Switching to time display mode As shown in FIG. 8, set the measurement state or memo display state and operate the push button switch S3. In this case, step SIO detects the operation, step Sll confirms that the time display mode is not yet set, and further confirms that it is not in the set state, that is, in the measurement state or memo display state. 517), O in step M
to set the time display mode (step 518).
. A signal is then sent to the RS flip-flop 13 to reset it (step 319).
), then a display process is started and a process of displaying the current time from the time counting circuit 8 on the liquid crystal display device 4 is executed (step D2).

Note that when a switch operation is performed after switching to the time display mode, the corresponding process is performed in step 358, and the time after the process is displayed in step D2.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be modified and applied in various ways without departing from the scope of the present invention.

[Effects of the Invention] As explained in detail above, the present invention includes a timekeeping means for obtaining the current time, a vertical distance calculation means for calculating the vertical distance from a reference point to a local point using a pressure sensor, and a reference point. A measuring means for measuring the time required to travel from a point to a local point, and a storage means for storing the vertical distance to a preset target point are provided, and the current time and the vertical distance of the local point from each of the above means are provided. The estimated time of arrival at the target point is automatically calculated and displayed based on the time and vertical distance to the target point, so you can easily calculate the estimated time of arrival at the target point with just a simple operation. It is possible to provide an electronic timepiece with a pressure sensor that can detect pressure.

[Brief explanation of the drawing]

1 to 8 show one embodiment of the present invention, FIG. 1 is a block circuit diagram of this embodiment, FIG. 2 is a diagram showing the external appearance of this embodiment, and FIG. 3 is the same as that of FIG. 1. FIG. 4 is a general flowchart showing an overview of the operation; FIG. 5 is a flowchart showing the switch process in FIG. 4 in detail; FIG. 6 is a detailed flowchart showing the measurement process in FIG. 4. 7 is a flowchart showing the display processing in FIG. 4 in detail, and FIG. 8 is a diagram showing the transition of the display in response to switch operation. 1. Watch case, 2. ......Pressure sensor, 3...Display unit, 4...Liquid crystal display device, 6...Oscillation circuit, 7... Frequency division circuit ,
8...Time counting circuit, 13...RS flip-flop, 14...AND gate, 1
5... Analog-to-digital conversion circuit, 17.
...Switch section, 19...Buzzer circuit,
20...RAM, 21...CPU, M
...Mode flag, N...Status counter, A, B, C...Display counter. Patent Applicant Casio Computer Co., Ltd. Agent Patent Attorney −昭勺ζl）LN Figure 8

Claims (1)

[Claims] A clock means for obtaining the current time, a pressure sensor, a vertical distance calculation means for calculating the vertical distance from the reference point to the local point based on the detected pressure of the pressure sensor, and a pressure sensor for calculating the vertical distance from the reference point to the local point. a measuring means for measuring the time spent;
A storage means for storing the vertical distance to a preset target point, and an estimated time of arrival at the target point is calculated based on the current time, vertical distance to the current point, time, and vertical distance to the target point from each of the above means. What is claimed is: 1. An electronic timepiece with a pressure sensor, characterized in that the electronic timepiece is equipped with a calculation means for calculating the estimated time of arrival, and a display means for displaying the expected arrival time calculated by the calculation means.