JP4487585B2 - Electronic clock and control program - Google Patents

Description

  The present invention relates to an electronic timepiece, an electronic timepiece control method, a control program, and a recording medium, and more particularly to an electronic timepiece that performs time correction using a GPS receiver, an electronic timepiece control method, a control program, and a recording medium.

Conventionally, various methods for acquiring local time information of a destination in overseas travel using GPS positioning radio waves including high-accuracy time information from a GPS (Global Positioning System) satellite have been proposed (for example, Patent Document 1 and Patents). (Refer to Literature 2, Patent Literature 3, and Patent Literature 4)
JP 2003-114290 A JP-A-8-110230 JP 2003-161792 A JP 2003-139875 A

However, when obtaining the local time information at the destination, it is necessary for the user to consciously perform measurement by GPS, which is inconvenient.
In order to solve this problem, when considering a device that automatically performs measurement by GPS, it is preferable to shorten the measurement interval for performing measurement by GPS. The watch has a problem that the power consumption is too large to be put into practical use.
In addition, in order to reduce power consumption, when the measurement is performed once or twice a day, such as a radio clock, when moving by airplane, etc. Since it does not coincide with the time, there is a problem that the user has to manually instruct the measurement after all.
Accordingly, an object of the present invention is to provide an electronic timepiece and a control program that can automatically display the local time even when traveling by airplane and can reduce power consumption.

In order to solve the above problems, the aircraft is moved based on the pressure measurement unit that measures the pressure of the external gas at predetermined time intervals and the pressure difference that is the difference between the current measurement pressure and the previous measurement pressure. An aircraft movement discriminating unit that determines whether or not the vehicle is moving, a time information acquiring unit that receives GPS positioning radio waves from GPS satellites at predetermined reception intervals to acquire time information, and updates the time information; If it is determined that the time information is acquired, the time information acquisition unit acquires the time information, the time information is updated, it is determined that movement by an aircraft is performed , and If the current measured pressure is reduced from the measured pressure of the last time, with a, a reception interval control unit for a predetermined regular time interval shorter than the time interval reception interval in the time information acquisition unit It is characterized by a door.
According to the said structure, a pressure measurement part measures the pressure of external gas for every predetermined time interval.
The aircraft movement determination unit determines whether or not the aircraft is moving based on a pressure difference that is a difference between the current measurement pressure and the previous measurement pressure.
The time information acquisition unit receives GPS positioning radio waves from GPS satellites at predetermined reception intervals, acquires time information, and updates the time information.
As a result, when it is determined that the aircraft is moving, the update control unit causes the time information acquisition unit to acquire the time information and update the time information.
In parallel with these, the reception interval control unit determines that the aircraft movement determination unit has moved by the aircraft, and if the current measurement pressure is lower than the previous measurement pressure, The reception interval in the time information acquisition unit is set to a time interval shorter than a predetermined normal time interval.

In this case, the pre-Symbol reception interval control unit, it is determined that travel by aircraft have been made, and, if the current measured pressure is increased from the measured pressure of the last time, the time information acquisition unit The reception interval may be the normal time interval.

A computer controls an electronic timepiece that includes a pressure measuring unit that measures the pressure of an external gas and a GPS receiver that receives GPS positioning radio waves from GPS satellites at predetermined reception intervals and acquires time information. The control program for causing the pressure measurement unit to measure the pressure of the external gas at predetermined time intervals, and based on the pressure difference that is the difference between the current measurement pressure and the previous measurement pressure, movement by the aircraft is performed. It is determined whether or not it has been made, the GPS receiver is made to receive GPS positioning radio waves from GPS satellites at a predetermined reception interval, time information is acquired, time information is updated, and movement by an aircraft is made If it is determined, said to acquire the time information to the GPS receiver, to perform the updating of the time information, it is determined that travel by aircraft have been made, and, above this If the constant pressure is decreased from the measured pressure of the last time, to a time interval shorter than the reception interval spacing a predetermined normal time in the GPS receiver,
It is characterized by that .

In addition , when it is determined that the aircraft is moving and the current measurement pressure is higher than the previous measurement pressure, the reception interval at the GPS receiver is set to the normal time interval. It may be .

  According to the present invention, local time can be automatically displayed even when a small and portable electronic timepiece is worn or carried like a wristwatch type electronic timepiece and moved by airplane, and power consumption is reduced. Can be achieved.

Next, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external front view of a so-called dive computer which is an electronic timepiece according to an embodiment.
FIG. 2 is a schematic block diagram of the dive computer.
The dive computer 1 calculates and displays the diver's depth and diving time during diving and measures the amount of inert gas (mainly nitrogen gas) accumulated in the body during diving. It is configured to display the time until the nitrogen accumulated in the body is discharged in the state of rising from the water.
The dive computer 1 is connected to a disk-shaped device main body 2 in the vertical direction of the drawing, and is used by being attached to a user's arm by the arm bands 3 and 4 in the same manner as a wristwatch. It is like that.

In the apparatus main body 2, the upper case and the lower case are fixed in a completely watertight state by a screwing method or the like, and various electronic components (not shown) are incorporated. A display unit 10 having a liquid crystal display panel 11 is provided on the front side of the apparatus main body 2 in the drawing.
Further, an operation unit 5 for selecting / switching various operation modes in the dive computer 1 is formed on the lower side of the apparatus main body 2, and the operation unit 5 includes two push button type switches A and B. ing. A diving operation switch 30 using a continuity sensor used for determining whether or not diving has been started is configured on the left side of the apparatus main body 2 in the drawing. The diving operation monitoring switch 30 has electrodes 31 and 32 provided on the front side of the apparatus main body 2 in the drawing, and the resistance between the electrodes 31 and 32 is established between the electrodes 31 and 32 by seawater or the like. It is determined that the water has entered when the value becomes smaller. However, the diving operation switch 30 is only used for detecting that water has entered and for shifting the operation mode of the dive computer 1 to the diving mode, and for detecting that the diving has actually started. It is not used for. That is, there are cases where the arm of the user wearing the dive computer 1 is just immersed in seawater, and it is not preferable to determine that diving has started in such a state.

For this reason, in this dive computer, when the water pressure (water depth) is equal to or higher than a certain value by the pressure sensor built in the apparatus main body 2, more specifically, when the water pressure is equal to or higher than 1.5 [m] as the water depth. It is considered that the dive has been completed when the water pressure is less than 1.5 [m] at the water depth.
As shown in FIG. 2, the dive computer 1 is roughly classified into an operation unit 5 for performing various operations, a display unit 10 for displaying various information, a diving operation monitoring switch 30, an alarm sound from a buzzer, and the like. A sound generating device 37 for performing notification, a vibration generating device 38 for notifying the user by vibration, a control unit 50 for controlling the entire dive computer, a pressure measuring unit 61 for measuring atmospheric pressure or water pressure, and a time measuring unit for performing various time measuring processes. 68 is provided. The display unit 10 includes a liquid crystal display panel 11 for displaying various types of information and a liquid crystal driver 12 for driving the liquid crystal display panel 11.

  The control unit 50 is connected to the switches A and B (= the operation unit 5), the diving operation monitoring switch 30, the sound reporting device 37, and the vibration generating device 38, and controls the entire device, and a CPU 51 under the control of the CPU 51. The control circuit 52 for controlling the liquid crystal driver 12 to cause the liquid crystal display panel 11 to perform display corresponding to each operation mode, or for performing processing in each operation mode in the time counter 33 described later, a control program, and A ROM 53 that stores control data and a RAM 54 that temporarily stores various data are provided.

The pressure measuring unit 61 measures and displays the water depth (water pressure) in the dive computer 1 and measures the amount of inert gas (mainly nitrogen gas) accumulated in the user's body from the water depth and the diving time. Therefore, the pressure and water pressure are measured. The pressure measuring unit 61 controls the pressure sensor 34 constituted by a semiconductor pressure sensor, an amplification circuit 35 for amplifying the output signal of the pressure sensor 34, and analog / digital conversion of the output signal of the amplification circuit 35, and performs control. And an A / D conversion circuit 36 that outputs to the unit 50. In the dive computer 1, the time measuring unit 68 outputs a clock signal having a predetermined frequency and divides the clock signal from the oscillation circuit 31 in order to measure the normal time and monitor the dive time. And a time counter 33 that performs time-counting processing in units of one second based on the output signal of the frequency dividing circuit 32.
Furthermore, the time information update unit 70 includes a GPS receiving unit 71 that receives a GPS positioning radio wave from a GPS satellite, a position detection unit 72 that extracts current position information from positioning data included in the GPS positioning radio wave, and a GPS positioning radio wave A time detection unit 73 that extracts time information (current time information) from the measured positioning data, and a timing circuit 74 that controls reception timing of GPS positioning radio waves, extraction timing of current position information, extraction timing of time information, and the like. ing.

Next, the configuration of the display unit will be described in detail with reference to FIG.
The display surface of the liquid crystal display panel 11 constituting the display unit 10 is composed of nine display areas. The display surface 11A of the liquid crystal display panel 11 includes eight display areas. In the present embodiment, an example in which the display surface 11A is circular has been described, but the display surface 11A is not limited to a circular shape, and may be another shape such as an elliptical shape, a track shape, or a polygonal shape.
Of the display surface 11A, the first display area 111 located on the upper left side of the drawing is the largest among the display areas, and includes various types such as a diving mode, a surface mode (time display mode), a planning mode, and a log mode. In the operation mode, the current water depth, current month date, water depth rank, and diving date (log number) are displayed.
The second display area 112 is located on the right side of the first display area 111 in the drawing. In the diving mode, the surface mode (time display mode), the planning mode, and the log mode, the diving time, the current time, and no decompression diving are possible. The time and dive start time (dive time) are displayed.

The third display area 113 is located on the lower side of the first display area 111 in the drawing. In the diving mode, the surface mode (time display mode), the planning mode, and the log mode, the maximum water depth, the body nitrogen discharge time, The safety level and maximum water depth (average water depth) are displayed.
The fourth display area 114 is located on the right side of the third display area 113 in the drawing. In the diving mode, the surface mode (time display mode), the planning mode, and the log mode, the decompression-free dive time, the water surface rest time, The temperature and the dive end time (maximum depth water temperature) are displayed.
The fifth display area 115 is located on the lower side of the third display area 113 in the drawing, and the power supply capacity out warning display section 104 for displaying power out of capacity and the altitude rank for displaying the altitude rank to which the user's current altitude belongs. A display unit 103 is provided.

The sixth display area 116 is located on the lower left side of the drawing in the display area 11A, and the amount of nitrogen in the body is displayed in a graph.
The seventh display area 117 is located on the right side of the sixth display area 116 in the drawing. When the diving mode is in a reduced pressure diving state, nitrogen gas (inert gas) tends to be absorbed or discharged. An area indicating whether or not (up and down arrows are shown in the figure), an area displaying “SLOW” for instructing deceleration as one of the ascent warnings when the ascending speed is too high, and diving And an area for displaying “DECO” for warning that decompression diving must be performed.
The eighth display area 118 is located on the right side of the second display area 112 and the fourth display area 114 in the drawing, and the ascent speed is displayed in a graph by nine segments. For example, the ascent speed is ascending in the current water depth area. When the upper limit speed is exceeded, all nine segments are blinking to notify the diver that the upper limit speed of levitation in the current water depth has been exceeded.

FIG. 3 is a time update outline process flowchart of the dive computer.
When the measurement timing comes every 10 minutes (step S1), the CPU 51 drives the pressure measurement unit 61 to measure the atmospheric pressure (altitude) (step S2).
Specifically, the pressure sensor 34 of the pressure measuring unit 61 measures the atmospheric pressure (or water pressure), and outputs an output signal having a voltage corresponding to the measured pressure value to the amplifier circuit 35.
The amplifier circuit 35 amplifies the output signal of the pressure sensor 34 and outputs the amplified signal to the A / D conversion circuit 36 as an amplified output signal. As a result, the A / D conversion circuit 36 performs analog / digital conversion of the amplified output signal and outputs it to the CPU 51 of the control unit 50 as atmospheric pressure (altitude) measurement data.
Thereby, CPU51 memorize | stores atmospheric pressure measurement data (equivalent to this measurement pressure) in RAM54 (step S3).

Subsequently, the CPU 11 reads the atmospheric pressure measurement data one hour ago (corresponding to the previous measurement pressure) from the RAM 54 and compares it with the current atmospheric pressure measurement data (step S4). It is determined whether or not the pressure difference (reference pressure difference) that can be generated when it is made is greater than or equal to (step S5).
Specifically, for example, it is determined whether or not the pressure difference is greater than or equal to a reference pressure difference corresponding to an altitude of 2000 m. Here, as a reference pressure difference, assuming that the altitude is 0 m and the atmospheric pressure is 1013 hPa, the atmospheric pressure is considered to be about 900 hPa at an altitude of 1000 m, and the atmospheric pressure is about 800 hPa at an altitude of 2000 m.

In step S5, if the pressure difference changes more than the altitude difference of 2000 m or more, that is, if the altitude difference is 2000 m or more in one hour, it is very likely that the aircraft is moving. Therefore, the CPU 51 causes the GPS receiver 71 to receive GPS positioning radio waves from GPS satellites via the timing circuit 74 (step S6).
Thereby, the position detector 72 extracts the current position information from the positioning data included in the GPS positioning radio wave. Further, the time detection unit 73 extracts time information (current time information) from the positioning data included in the GPS positioning radio wave. The CPU 51 calculates the local time at the current position based on the obtained time information (current time information) and position information, and stores the calculated local time in the RAM 54 (step S7). At this time, the local time displayed on the display unit 10 is not updated, and the display of the local time before movement by the aircraft is continued.

Next, it is determined whether or not the pressure difference detected in step S4, that is, the altitude difference corresponds to an increase of 2000 m or more (step S8).
In the determination of step S8, if the altitude difference corresponds to an increase of 2000 m or more (step S8; Yes), it is determined that the aircraft is moving and the user is moving to a place with a time difference, The timing circuit 74 changes the timing so that the GPS receiver 71 performs measurement every hour.
That is, when it is determined that the aircraft is moving and the current measurement pressure is lower than the previous measurement pressure, the reception interval in the GPS receiver is set to a predetermined normal time interval (in this embodiment, The time interval (1 hour in this embodiment) is shorter than 24 hours starting from AM2: 00.

As a result, the current position while moving by airplane is traced, and the time calculation considering the time difference is performed. However, in this case, the display on the liquid crystal display panel of the display unit 10 is not changed, and the time display that continues before boarding the airplane is performed.
If it is determined in step S8 that the altitude difference corresponds to a decrease of 2000 m or more (step S8; No), it is determined that the aircraft has arrived at the destination, and the CPU 51 has stored it in the RAM 54 in step S7. The local time is read, and the accurate local time is displayed on the liquid crystal display panel 11 of the display unit 10 (step S10).
Further, the timing circuit 74 changes the timing so that the GPS receiver 71 performs measurement every 24 hours starting from the normal AM 2:00 (step S11).

As described above, according to the present embodiment, when moving to a place with a time difference, the boarding of the aircraft is detected by the pressure sensor 34, and the destination location, the local time is detected using the GPS receiver 71. Since the display is automatically updated in accordance with the local time, the local time can be displayed without the user being aware of it, and the convenience is improved.
In addition, since reception at the GPS receiver is suppressed to the minimum necessary level, power consumption can be reduced.
In the above description, the reference pressure difference is set to an altitude difference of 2000 m. However, the altitude difference corresponding to a pressure difference that can be determined to be moving by an aircraft can be changed as appropriate.

In the above description, the case where the control program for controlling the dive computer as the electronic timepiece is stored in the ROM in advance has been described. However, the control program is stored in a recording medium such as various magnetic disks, optical disks, and memory cards. It is also possible to record in advance, read from these recording media, and install. It is also possible to provide a communication interface and download the control program via a network such as the Internet or LAN, and install and execute the program. By configuring in this way, it becomes possible to make the electronic timepiece more functional in terms of software or more reliable.
In the above description, the case of a dive computer has been described as an example of an electronic timepiece. However, the present invention is not limited to this, and can be applied to general electronic timepieces (digital and analog) having an automatic time adjustment function. It is.
In the above description, the case where the electronic timepiece (dive computer) is an arm-mounted type has been described. However, the present invention is not limited to this, and the pendant type, the necklace type, the body-mounted type (belt type), or the ring Variations such as molds and pocket watch types are possible.

It is an external appearance front view of a dive computer. It is a general | schematic block diagram of a dive computer. It is an outline processing flowchart of time information update control processing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Dive computer (electronic timepiece), 5 ... Operation part, 10 ... Display part, 11 ... Liquid crystal display panel, 12 ... Liquid crystal driver, 30 ... Diving operation monitoring switch, 37 ... Sound report device, 38 ... Vibration generator, 50 Control unit 51 CPU (aircraft movement determination unit) 61 Pressure measurement unit (pressure measurement unit) 68 Timekeeping unit 70 Time information update unit (update control unit) 71 GPS reception unit (time information) (Acquisition part), 72 ... position detection part, 73 ... time detection part, 74 ... timing circuit.

Claims (4)

A pressure measuring unit that measures the pressure of an external gas at predetermined time intervals;
An aircraft movement determination unit that determines whether or not movement by an aircraft is performed based on a pressure difference that is a difference between the current measurement pressure and the previous measurement pressure;
A time information acquisition unit that receives GPS positioning radio waves from GPS satellites at predetermined reception intervals to acquire time information, and updates the time information;
An update control unit that causes the time information acquisition unit to acquire the time information and update the time information when it is determined that movement by an aircraft is made;
When it is determined that movement by an aircraft has been made and the current measurement pressure is lower than the previous measurement pressure, the reception interval in the time information acquisition unit is shorter than a predetermined normal time interval. A reception interval control unit as an interval;
An electronic timepiece characterized by comprising: The electronic timepiece according to claim 1 ,
The reception interval control unit determines that the movement by the aircraft is being performed, and if the current measurement pressure is greater than the previous measurement pressure, the reception interval control unit determines the reception interval in the time information acquisition unit. An electronic timepiece characterized by normal time intervals. A computer for controlling an electronic timepiece having a pressure measuring unit that measures the pressure of an external gas and a GPS receiver that receives GPS positioning radio waves from GPS satellites at predetermined reception intervals and acquires time information. In the control program of
Let the pressure measurement unit measure the pressure of the external gas at predetermined time intervals,
Based on the pressure difference that is the difference between the current measured pressure and the previous measured pressure, it is determined whether or not the aircraft is moving,
Let the GPS receiver receive GPS positioning radio waves from GPS satellites at a predetermined reception interval to acquire time information, update the time information,
When it is determined that movement by an aircraft is made, the GPS receiver is made to acquire the time information, and the time information is updated .
When it is determined that movement by an aircraft is being performed and the current measurement pressure is lower than the previous measurement pressure, the reception interval at the GPS receiver is set to a time interval shorter than a predetermined normal time interval. Let
A control program characterized by that. The control program according to claim 3 , wherein
When it is determined that movement by an aircraft is made and the current measurement pressure is higher than the previous measurement pressure, the reception interval in the GPS receiver is set to the normal time interval. Control program.

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