JPH0720267A - Timepiece - Google Patents

Abstract

PURPOSE:To allow the display of time at an arbitrary time unit exceeding 24 hours by displaying a time unit added with 24 as a current time when a measured time is later than 0 a.m. but earlier than an upper limit set time along with the date of previous day. CONSTITUTION:A CPU 3 performs time measuring processing based on a timing signal generated from a frequency division/timing circuit 2 and displays 7 an updated time. When the display mode is 12/24 hours, a key K1 at a key input section 8 is turned to switch the display mode from 12/24 hours to 30 hours. If the current time is later than 0 a.m. but earlier than 6 a.m., the numeric value of time unit representative of current time in a time register is added with 24 and displayed 7 as 25 o'clock 35min, for example. At the same time, 1 is subtracted from the current date in a date register and displayed 7. This constitution eliminates the need of time conversion thus preventing error in the observed time caused by conversion miss.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a 12-hour system or a 24-hour system.
The present invention relates to a clock that can display time in a time unit other than the time system.

[0002]

2. Description of the Related Art The time display method is usually
There is a 12-hour system display that divides into morning and afternoon such as what time in the afternoon, and a 24-hour system that displays the time between am and pm, such as 14:00 after 13:00 and 15:00. . In general daily life, the 12-hour system is often used, but the timetable for transportation such as railways is 2
A four-hour display is often used.

However, astronomers and amateur astronomers
When performing astronomical observations, the observations are usually made between sunset and dawn. Therefore, for astronomical observers, midnight is often in the middle of observation, and the date is often two days. For this reason, when recording observation data, astronomical observers date the observation status and record it together with the time. For example, when recording the observation situation at 1 am on June 10, June 9 The date and time are recorded at 25:00 on June 9th, in order to record the observations from the above.

That is, the observation was made at 11:56 pm on June 9, and the next observation time was 1:25 am on June 10.
If it is a minute, if the date and time displayed on the clock are used as they are, the date will be recorded over two days, such as June 9th and June 10th. , The time record is also 11:56 pm (or 2
3:56) and 1:25 am, which makes it difficult to understand the passage of time. Therefore, in the case of astronomical observation, the date and time should not be recorded at 1:25 am on June 10th.
The date and time are recorded at 5:25. In this way, the astronomical observer is dawn (6 am
The observation time is recorded in a 30-hour system for 6 hours up to the time.

[0005]

However, at the present time,
Some commercially available clocks have a 12-hour display or a display that can be selectively switched between a 12-hour system and a 24-hour system, but both have a date display function at midnight. Things change the date and time is 1 am
After the hour, the 12-hour system or the 24-hour system is displayed again.

For this reason, astronomical observers, for example, June 10
When recording the observation result at 1 am on the day, it is the current situation that the observer himself converts the clock display into a 30-hour system and records it as 25:00 on June 9. Thus, when the observer is in the dark at midnight or busy during observation, 3
Converting to the 0-hour system also causes a mistake in conversion. Errors in time due to such conversion errors not only reduce the reliability of the observation data themselves, but are not recognized as new discoveries due to time recording errors even when important observations such as the discovery of new comets are made. In some cases, it was necessary to be very careful when converting the time.

An object of the present invention is to provide a timepiece capable of displaying the 30-hour system normally used for astronomical observation and also capable of displaying the time not only in the 30-hour system but also in any time unit exceeding 24 hours. It is to be.

[0008]

A first aspect of the present invention comprises a clocking means for clocking a reference signal to obtain time information, and a display means for displaying the clocked time information by the clocking means in a 30-hour system. ing.

A second aspect of the invention is a clocking means for clocking a reference signal to obtain time information and date information, and an upper limit of the time when the time information clocked by the clocking means is displayed in a time unit exceeding 24 hours. When the time information obtained by the setting means for setting the value and the time measuring means exceeds midnight and is less than or equal to the upper limit value set by the setting means, the time unit of the time information is 2
The time display means for displaying the value obtained by adding 4 as the current time and the date display means for displaying the date of the previous day when the time display for more than 24 hours are being performed are provided.

[0010]

In the first invention, when the astronomical observation continues from sunset until the dawn of the next day, when the observation record after midnight is taken, for example, 1:35 am is displayed as 25:35. Therefore, the observation time can be recorded without converting the time.

Further, according to the second invention, the time can be displayed in an arbitrary time unit exceeding 24 hours. Further, when the time exceeding 24 hours is displayed, the date of the previous day is displayed. Therefore, for example, when recording the observation time and date, the user sets the date and time to the time and date of a predetermined time system. The burden on the user is reduced without the need for conversion.

For example, when it is desired to record the time until 4 am as a continuous time, if the time setting means sets 4 o'clock, the time between midnight and 4 am The time obtained by adding 24 to the hourly numerical value at that time is displayed. Further, if the date at that time is June 10, the date of June 9 of the previous day is displayed.
Therefore, it is possible to display the date and time in time units that match the scheduled time of observation or measurement.

[0013]

EXAMPLES Examples of the present invention will be described below. Figure 1
It is a figure which shows the structure of the digital timepiece of 1st Example of this invention. The oscillator 1 generates a clock signal of a fixed cycle, and the frequency dividing / timing circuit 2 divides the clock signal and outputs a timing signal serving as a reference for timekeeping and a timing signal for controlling the operation of each part of the circuit to the CPU 3.

The CPU 3 executes key processing, time counting processing, etc. in accordance with a control program stored in the ROM 4, stores the counted time data in the RAM 5, and
The time data is output to the display drive circuit 6 to display the current time on the display unit 7.

Although not shown in the figure, the key input unit 8 is a K1 key for switching the display mode of the 12/24 hour system and the display mode of the 30 hour system, and 12 hours in the display mode of the 12/24 hour system. It has a K2 key and the like for switching between the time display of the 24-hour system and the time display of the 24-hour system.

Next, FIG. 2 is a diagram showing the structure of the storage area of the RAM 5. The mode setting unit 51 includes a register M that stores a numerical value indicating whether the display mode is the 12/24 hour display mode or the 30 hour display mode. When the display mode is the 12/24 hour display mode, the register M is used. "0" is set in M, and "1" is set in the register M in the 30-hour display mode.

The 12-hour / 24-hour setting unit 52
In the 24-hour display mode, it comprises a register N that stores a numerical value indicating whether it is a 12-hour display or a 24-hour display. When the 12-hour display is used, "0" is stored in the register N for 24 hours. When the control is displayed, "1" is set in the register N.

The date register 54 is a register for storing the current date, and the time register 55 is a register for storing the current time. The display register 56 is a register that stores display data to be displayed on the display unit 7.

Next, the overall processing operation of the digital timepiece of this embodiment will be described with reference to the flowchart of FIG. When the CPU 3 is in the normal halt state and receives the timing signal for timekeeping, the CPU 3 executes the timekeeping process of step S1 to update the time. Further, the display process of step S2 is executed to display the updated time.

On the other hand, if any key input is detected, the key processing of step S3 is executed. FIG. 4 is a flowchart showing the key processing of step S3. First,
In step S11, it is determined whether or not the key K1 for setting the mode is input. When the key K1 is input, it is determined in the next step S12 whether or not the value of the register M of the RAM 5 is "0", and the key K1 is operated in the display mode of 12/24 hour system with M = 0. Then, in the next step S13, "1" is set in the register M and 30
Switch to the time display mode.

When M = 1 in the determination in step S12, that is, in the 30-hour display mode, the key K1
When is operated, the process proceeds to step S14 and "0" is set in the register M to switch to the 12/24 hour display mode.

On the other hand, if the key K1 for mode setting has not been operated, the process proceeds to step S15, and it is determined whether or not the key K2 for switching between the 12-hour display and the 24-hour display is input. If the key K2 is input, it is determined in the next step S16 whether the register M of the RAM 5 is "0".

When M = 0 in this determination, it is further determined in step S17 whether the value of the register N is "0",
If N = 0, it means that the key K2 has been operated in the display state of the 12-hour system. In this case, the process proceeds to step S18 and "1" is set in the register N to switch the display to the 24-hour system. At this time, if N = 1, it means that the key K2 is operated in the 24-hour display state. In this case, the process proceeds to step S19 and "0" is set in the register N to set the 12-hour system. Switch to the display of.

If it is determined in step S15 that the key K2 is not entered, the process proceeds to step S20 and another key process is executed. By this key processing, the key K1 is operated to switch between the 12 / 24-hour display mode and the 30-hour display mode, and further the key K2 is operated to switch between the 12-hour display and the 24-hour display. Can be switched.

Next, the processing contents of the display processing in step S2 of FIG. 3 will be described with reference to the flowchart of FIG.
First, it is determined in step S21 of FIG. 5 whether M is 0, and if M = 0, it is determined in the next step S22 whether N is 0. When M = 0 and N = 0,
Proceeding to step S23, the time is displayed in a 12-hour system. When N = 1, the process proceeds to step S24, and the time is displayed in a 24-hour system.

If M = 1 in the determination in step S21, the current time of the time register 55 is past midnight,
And it is judged whether it is before 6:00 am (S25). If the current time is past midnight and before 6 am, step S2
The process proceeds to step 6 and displays the time obtained by adding "24" to the numerical value of the current time of the time register 55 in units of hours. Further, in step S27, the date obtained by subtracting "1" from the current date in the date register 54 is displayed on the display unit 7.

As a result, for example, if the current time is 2:30 am on June 10, 24 hours is added to the numerical value at that time.
The time when 26 is added, that is, 26:30 is displayed on the display unit 7 as the current time, and the date from June 10 to 1
June 9 minus the date is displayed.

When the present time is after 6:00 am in the determination in step S25, the process proceeds to step S24 and the 24-hour display is performed. In this case, if the current time is 6:40, 6:40 is displayed as it is.

FIG. 6 shows a 12-hour system, a 24-hour system and a 30-hour system.
It is a figure which shows an example of the display state of time system. The figure (a) is 1
Shown below is an example of a 2-hour display. June 10, 1993,
Thursday (TH), 1:23:45 is displayed. In this case, nothing is displayed on the 24-hour / 30-hour display unit 13 in the upper left corner of the time display unit 12. When the key K2 is pressed in the 12-hour system display state, the display is switched to the 24-hour system shown in FIG. 8B, and the 24-hour / 30-hour display unit 13 provided at the upper left corner of the time display unit 24 is displayed. A display indicating that it is a time display, for example, "24" is displayed.

When the key K1 is operated in the display state of the 12-hour display or the 24-hour display, the display is switched to the 30-hour display. In this case, as shown in FIG. 7C, the time display section 12 displays 25:23:45, and the 24-hour / 30-hour display section 13 displays a 30-hour system. "30" indicating that is displayed, and the date displayed in this case is one day ago, June 9, 1993.
It will be the day. Here, the expression of 30 hour system was used, but since it switches at 6 o'clock, in reality,
Although it is a time display up to 29 hours 59 minutes 59 seconds ...
For the sake of convenience, the expression of 30 hour system is used.

By operating the key K1 in this manner, 30
Time display can be done, so from sunset to the next day's dawn 6
In the case of performing astronomical observation until the time, the time display when recording observation data after midnight is automatically displayed as a 30-hour time by simply switching the mode. be able to. Therefore, the observer does not need to convert the time by himself, the displayed time of the displayed 30-hour system can be recorded as the observation time as it is, and an accurate time can be recorded.

In the first embodiment, the case where the time display is limited to 30 hours has been described. However, the time display is not limited to this, and the user can arbitrarily select how many hours are displayed. You may be able to set it.

FIG. 7 is a diagram showing a storage area of the RAM 5 of the second embodiment of the present invention in which the user can arbitrarily set how many hours are displayed. In this case, R
The AM 5 is provided with a set time storage unit 53 that stores a set time (upper limit value of time) that determines how many hours the time is displayed. In the set time storage unit 53, the scheduled observation end time and the like set by the user is stored as the set time.

The display process in the second embodiment will be described below with reference to FIG.
This will be described with reference to the flowchart in FIG. First, in step S31 of FIG. 8, it is determined whether or not the value of the register M is 0. If M = 0, the process proceeds to step S32 and the register N
It is determined whether the value of is 0. If N = 0 in this determination, the process proceeds to step S33 to display the 12-hour time, and if N = 1, the process proceeds to step S34 to display the 24-hour time.

If M = 1 in the determination in step S31, the process proceeds to step S35, and it is determined whether or not the current time is past midnight and before the set time stored in the set time storage unit 53. To do.

If the current time is past midnight and before the set time, the time obtained by adding "24" to the numerical value of the current time in hour units is displayed on the display unit 7 in step S36. Further, in the next step S37, the date obtained by subtracting "1" from the current date is displayed on the display unit 7. For example, if the user has set 4:30 as the set time in the set time storage unit 53 of the RAM 5 and the current time is 2:30 am, since it is before the set time, the time of the current time is set. 26:30, which is the unit value "2" plus "24", is displayed as the current time. The current date is June 1
If it was 0th day, June 9th, which is 1 subtracted from that date
The day is displayed as the current date.

When it is determined in step S35 that the current time exceeds the set time in the set time storage unit 53, the process proceeds to step S34 described above, and the 24-hour display is performed.

As described above, by allowing the user to arbitrarily set the set time, when the observation end time is known in advance, it is possible to display the time according to the scheduled end time.

[0039]

According to the present invention, since the time can be displayed in the 30-hour system, the observer records the 30-hour system date and time displayed on the clock as the observation date and time during astronomical observation. be able to. Therefore, the time conversion work conventionally performed by an observer becomes unnecessary, and it is possible to prevent erroneous recording of the observation time due to a conversion error.
In addition, since it is possible to arbitrarily set the time after 24 o'clock and the continuous time display continued at 24 o'clock, it is possible to perform observation or display the time according to the scheduled measurement end time.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a digital timepiece according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a storage area of a RAM shown in FIG.

FIG. 3 is a flowchart showing the overall operation of the first embodiment.

FIG. 4 is a flowchart of key processing.

FIG. 5 is a flowchart of display processing.

FIG. 6 is a diagram showing an example of time display.

FIG. 7 is a diagram showing a storage area of a RAM according to a second embodiment of the present invention.

FIG. 8 is a flowchart of the display process of the second embodiment.

[Explanation of symbols]

 5 ... RAM K1, K2 ... keys 51 ... mode setting section 52 ... 12 hours / 24 hours setting section 53 ... setting time storage section

Claims (2)

[Claims] 1. A timepiece comprising: a time measuring means for measuring a reference signal to obtain time information; and a display means for displaying the time information obtained by the time measuring means in a 30-hour system. 2. A time measuring means for obtaining a time information and a date information by measuring a reference signal, and an upper limit value of the time when the time information measured by the time measuring means is displayed in a time unit exceeding 24 hours. A value obtained by adding 24 to the time unit of the time information when the time information obtained by the setting means and the time measuring means exceeds midnight and is less than or equal to the upper limit value set by the setting means. A time display means for displaying as a time unit of the current time, and a date display means for displaying the date of the previous day when the current time is displayed in a time unit exceeding 24 hours.