JP6340836B2 - Satellite signal receiving apparatus, electronic timepiece, and satellite signal receiving method - Google Patents

Description

  The present invention relates to a satellite signal receiving apparatus, an electronic timepiece, and a satellite signal receiving method for receiving a satellite signal transmitted from a position information satellite such as a GPS satellite.

There is known an electronic timepiece that receives a satellite signal transmitted from a position information satellite such as a GPS satellite and corrects a display time with time information (GPS time information) included in the satellite signal.
By the way, TOW (Time of week) which is information indicating time in GPS satellite signals.
Does not include leap second corrections. For this reason, the GPS satellite signal includes information indicating the current leap second. This leap second information is transmitted every 12.5 minutes. In view of this, there is known a radio-controlled wristwatch that displays leap second reception notice information indicating that it is attempting to receive information relating to the current leap second in order to receive information indicating the current leap second more reliably (Patent Document 1). reference).

  Patent Document 1 includes only a time measurement mode in which a GPS satellite signal is received and time information is acquired. On the other hand, in addition to the time measuring mode, an electronic timepiece having a satellite signal receiving device having a positioning mode for acquiring position information based on a GPS satellite signal is known (for example, see Patent Document 2).

JP 2011-208947 A JP2013-213828A

As shown in Patent Document 2, in a satellite signal receiving device having a timekeeping mode and a positioning mode, when displaying a reception standby state of leap second information after reception, the waiting time is a maximum of 12.5 minutes. (It may be 18 minutes).
For this reason, for example, if you move to another country with a different time zone, perform reception processing in positioning mode, and enter the leap second information reception standby state, the standby state display continues for several minutes to over a dozen minutes. Since the time is not displayed, the user cannot check the local time immediately.

In this case, it is conceivable to display the time temporarily by manual operation as in Patent Document 1, but the operation is necessary for displaying the time, which is complicated.
Also, in addition to the reception processing time in the positioning mode, until the reception processing of leap second information is completed, it is necessary to take measures such as placing the satellite signal receiving device in a stationary state where it is easy to receive, There is a problem that the user cannot use the electronic clock immediately.
Therefore, there has been a demand for a satellite signal receiving apparatus that can improve convenience during reception processing particularly in the positioning mode.

  An object of the present invention is to provide a satellite signal receiving device, an electronic timepiece, and a satellite signal receiving method capable of enhancing convenience during reception processing in a positioning mode.

  The satellite signal receiving apparatus of the present invention comprises receiving means for receiving a satellite signal transmitted from a position information satellite, and receiving control means for controlling the receiving means, wherein the receiving control means receives the receiving means. A reception mode setting unit for selecting and setting a mode from a plurality of reception modes including a time measurement mode for acquiring time information based on the satellite signal and a positioning mode for acquiring position information based on the satellite signal; A leap second reception control unit that controls leap second reception processing for acquiring leap second information included in the satellite signal, and the leap second reception control when the reception mode is set to the positioning mode. The operation of the part is prohibited.

The reception mode setting unit of the reception control means selects and sets a reception mode from a plurality of reception modes including at least a time measurement mode and a positioning mode. The reception control means performs reception processing based on the set reception mode.
The reception control means prohibits the operation of the leap second reception control unit when the reception mode is set to the positioning mode. For this reason, during the reception process in the positioning mode, it is prohibited that the leap second reception control unit operates to enter the leap second information reception standby state. For this reason, the leap second information reception process is not continued after the reception process in the positioning mode, and the leap second information reception standby state can be prevented. Therefore, the local time can be displayed immediately after the reception process in the positioning mode, and the convenience for the user can be improved.

  In the satellite signal receiving apparatus of the present invention, the reception control means performs reception processing in the timekeeping mode when the reception mode is set to the timekeeping mode and the leap second reception condition is satisfied. It is preferable to operate the leap second reception control unit to perform leap second information reception processing.

Here, when the leap second reception condition is met, the case where the leap second information is not stored in the storage unit for storing the leap second, such as when the system is reset, and the case where the leap second is set every six months. This is a case of a second reception period (for example, June 1-30, December 1-31), and the leap second information has not been successfully received during that period.
According to the present invention, the reception control means performs the reception process in the timekeeping mode when instructed by a user's manual operation or when an automatic reception condition is met. At this time, if the leap second reception condition is satisfied, the reception control means operates the leap second reception control unit to perform leap second reception processing. Therefore, when the leap second reception condition is satisfied, the leap second information reception process is automatically performed during the reception process in the timekeeping mode. For this reason, it is not necessary for the user to instruct reception of leap second information, and convenience can be improved. Further, by receiving leap second information, it is possible to display an accurate time reflecting the leap second information.

  In the satellite signal receiving apparatus of the present invention, the reception control means performs the leap second information reception process by operating the leap second reception control unit when the leap second reception process is instructed by the operation of the external operation member. It is preferable to carry out.

Here, as an external operation means, for example, if it is an electronic timepiece provided with a satellite signal receiving device, a crown and various buttons can be exemplified.
In the present invention, the leap second information receiving process can be executed by operating the leap second reception control unit by operating the external operation member that can be operated by the user or the like, so that the leap second information can be received at a timing desired by the user. Therefore, reception processing can be performed in an environment suitable for acquisition of leap second information, and the probability of successful acquisition of leap second information can be improved.

  In the satellite signal receiving apparatus of the present invention, it is provided with reception state display means for displaying a reception state, and the reception state display means displays that the leap second information is being received while the leap second information is being received. Is preferred.

  If the reception status display means displays that leap second information is being received, the user can easily grasp the reception status. Therefore, the satellite signal receiving device can be placed in an environment suitable for receiving leap second information, and the probability of successful acquisition of leap second information can be improved.

  The satellite signal receiving apparatus of the present invention further comprises a leap second standby state display means for displaying that it is waiting for receiving the leap second information, wherein the leap second reception control section is activated in the reception control means. When the leap second information reception process is performed, it is preferable to display the waiting time until the leap second information reception starts in a countdown display.

  According to the present invention, since the remaining time until the start of receiving leap second information is displayed in a countdown display, the user can easily grasp the time when reception of leap second information is started. For this reason, the user can move to a place where it is easy to receive a satellite signal having an open sky outdoors in accordance with the reception timing of leap second information, and the probability of successful reception of leap second information can be improved.

  In the satellite signal receiving apparatus of the present invention, the reception control means is instructed to interrupt the reception process by operating the external operation member when the leap second reception control unit is activated to perform the leap second information reception process. In such a case, it is preferable to continue the leap second information reception process.

  According to the present invention, the leap second information receiving process is performed by the leap second reception control unit, and the external operation member that can be operated by the user or the like while the leap second information is waiting to be received or the leap second information is being received. Even if the interruption of the reception process is instructed by the above operation, the leap second information reception process is continued. For this reason, even when the user gives an interruption instruction by mistake, the reception process can be continued and the leap second information can be received reliably.

  In the satellite signal receiving apparatus of the present invention, the reception control means is instructed to interrupt the reception process by operating the external operation member when the leap second reception control unit is activated to perform the leap second information reception process. In such a case, it is preferable to interrupt the leap second information reception process.

  According to the present invention, it is possible to give priority to a user's reception interruption instruction even while leap second information is being received. For this reason, the operation | movement which a user does not intend is not performed, but operativity can be improved.

  The electronic timepiece of the present invention updates the time of the time measuring means by outputting the time information acquired by the satellite signal receiving device to the time measuring means and the time measuring means for measuring the time of the satellite signal receiving device. And a time display means for displaying the time measured by the time measuring means.

  According to the electronic timepiece of the invention, since the satellite signal receiving device is provided, the reception processing of the leap second information is not performed during the reception processing in the positioning mode. The time can be displayed immediately, improving the convenience for the user.

  In the electronic timepiece according to the aspect of the invention, it is preferable that the time correction unit updates the time of the time measuring unit using the acquired leap second information when the leap second information is successfully acquired.

  According to the electronic timepiece of the invention, when the leap second information is successfully acquired, the time of the time measuring means is updated using the leap second information, so that it is possible to display the time with high accuracy.

  In the electronic timepiece of the invention, the time correction means determines whether or not updating with the acquired leap second information is necessary when the leap second information can be acquired while receiving the satellite signal in the positioning mode or the time measurement mode. When it is determined that the update is necessary, it is preferable to update the time of the time measuring means using the acquired leap second information.

  When the timing for receiving the satellite signal in the positioning mode or time measurement mode is the transmission timing of subframe 4 and page 18 including leap second information, and when leap second information can be received, the present invention acquires the leap second information. If it is determined that the update is necessary, the time of the time measuring means can be updated with the acquired leap second information. For this reason, it can be updated to an accurate time without performing leap second information reception processing by the leap second reception control unit.

  In the satellite signal receiving method of the present invention, the reception mode of the receiving means for receiving the satellite signal transmitted from the position information satellite is changed to a time measurement mode for acquiring time information based on the satellite signal, and on the basis of the satellite signal. And a leap second for acquiring leap second information included in the satellite signal when the reception mode is set to the positioning mode, and selected from a plurality of reception modes including a positioning mode for acquiring position information. Execution of reception processing is prohibited.

  According to the present invention, since the leap second information receiving process is not performed during the receiving process in the positioning mode, the local time can be immediately displayed after the receiving process in the positioning mode, and the convenience of the user can be improved. .

It is a front view of the electronic timepiece concerning a 1st embodiment of the present invention. It is a schematic sectional drawing of the electronic timepiece of 1st Embodiment. It is a block diagram which shows the structure of the electronic timepiece of 1st Embodiment. It is a block diagram which shows the structure of the memory | storage device of the electronic timepiece of 1st Embodiment. It is a figure explaining the structure of a navigation message. It is a flowchart which shows the reception processing procedure of the electronic timepiece of 1st Embodiment. It is a flowchart which shows the timekeeping mode reception processing procedure of the electronic timepiece of 1st Embodiment. It is a flowchart which shows the positioning mode reception processing procedure of the electronic timepiece of 1st Embodiment. It is a figure which shows the timing at which the leap second information in a GPS satellite signal is transmitted. It is a figure which shows the state of the indicator hand in time measurement mode reception process. It is a figure which shows the state of the indicator needle | hook during positioning mode reception processing. It is a figure which shows the state of the indicator hand in a leap second information reception process. It is a flowchart which shows the timekeeping mode reception processing procedure of the electronic timepiece of 2nd Embodiment. It is a flowchart which shows the reception processing procedure of the electronic timepiece of 3rd Embodiment. It is a flowchart which shows the leap second information reception process of 3rd Embodiment. It is a flowchart which shows the positioning mode reception processing procedure of a modification.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of an electronic timepiece 1 according to the first embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of the electronic timepiece 1.
As shown in FIG. 1, the electronic timepiece 1 includes at least one of position information satellites 100 (hereinafter sometimes referred to as GPS satellites 100) such as a plurality of GPS satellites orbiting the earth over a predetermined orbit. Time information is acquired by receiving a satellite signal from one position information satellite 100, and position information is calculated by receiving satellite signals from at least three position information satellites 100.

[Electronic clock]
The electronic timepiece 1 is a wristwatch worn on a user's wrist, and includes a display device 10 that displays time and the like, and an input device 70 that is an external operation member.

[Structure of electronic watch]
The electronic timepiece 1 includes an exterior case 30. The exterior case 30 is configured by fitting a bezel 32 made of ceramic to a cylindrical case 31 made of metal. Of the two openings of the exterior case 30, the opening on the front surface side is closed with a cover glass 33 through a bezel 32, and the opening on the back surface side is closed with a back cover 34 formed of metal. .
Inside the outer case 30, the dial ring 111 attached to the inner periphery of the bezel 32, the light-transmitting dial 11, the pointer shaft 27 penetrating the dial 11, and the pointer shaft 27 are attached. The hands 21, 22, 23, the indicator hands 24, the hands 25, 26, the hands 21, 22, 23, the indicator hands 24, the drive mechanisms 140 that drive the hands 25, 26 are provided.
The pointer shaft 27 is provided along a central axis that passes through the center of the exterior case 30 in plan view and extends in the front-back direction.

[Display device]
The display device 10 includes a dial plate 11, hands 21, 22, 23, indicator hands 24, hands 25, 26.
Most of the dial plate 11 is formed of a non-metallic material (for example, plastic or glass) that easily transmits light and microwaves in the 1.5 GHz band.
The dial plate 11 includes a scale 112 corresponding to the indicator hand 24 and a sub dial 113 corresponding to the hands 25 and 26.

[Basic clock]
The hands 21, 22, and 23 are provided on the surface side of the dial 11. The pointer 21 is a second hand, the pointer 22 is a minute hand, and the pointer 23 is an hour hand. The dial ring 111 is provided with a scale (index) for indicating the time by the hands 21, 22, and 23.
For this reason, the hands 21, 22, 23, the dial 11, and the dial ring 111 constitute a basic timepiece for displaying time. The basic clock mainly displays the current time. For example, when the electronic timepiece 1 is used in Honolulu, the local time (local time) of Honolulu is displayed. Therefore, the hands 21, 22 and 23 constitute time display means.

[Indicator display]
The indicator hand 24 is provided in the 10 o'clock direction on the surface side of the dial 11 and indicates various information by pointing to each position of the scale 112.
“DST (daylight saving time)” written on the scale 112 means daylight saving time. By operating the input device 70 such as the crown 71 and the button 72 and setting the indicator hand 24 to “ON” or “OFF” of “DST”, the electronic timepiece 1 can be set to ON / OFF of daylight saving time. .
An airplane-shaped symbol written on the scale 112 represents an in-flight mode. By operating the input device 70 and selecting the in-flight mode by matching the indicator hand 24 with the airplane-shaped symbol, the reception of the satellite signal of the electronic timepiece 1 can be stopped.

“E” and “F” written on the scale 112 indicate the remaining battery level.
“1” and “4+” written on the scale 112 indicate reception modes. The indicator hand 24 indicates “1” in the time measurement mode (time reception processing) for acquiring time information, and the indicator hand 24 is in the positioning mode (position reception processing) for acquiring position information. It indicates “4+” on the scale 112. Thus, the user can recognize whether the electronic timepiece 1 is in the positioning mode or the timekeeping mode by looking at the scale 112.

[Small clock]
The hands 25 and 26 are provided in the 6 o'clock direction on the surface side of the dial 11. The pointer 25 is a minute hand and the pointer 26 is an hour hand. The sub-dial 113 is provided with a 24-hour scale that indicates the time by the hands 25 and 26.
Therefore, the hands 25 and 26 and the sub dial 113 constitute a small clock that displays time. The small clock mainly displays a preset home time (for example, Japanese time).

[Dial ring]
A dial ring 111 is disposed around the dial 11. The dial ring 111 has an outer peripheral end in contact with the inner peripheral surface of the bezel 32, a flat plate portion parallel to the cover glass 33, and an inner peripheral end in contact with the dial 11. An inclined portion inclined toward the plate 11 side is provided. The dial ring 111 has a ring shape in a plan view and a mortar shape in a cross-sectional view. A donut-shaped storage space is formed by the flat plate portion, the inclined portion, and the inner peripheral surface of the bezel 32 of the dial ring 111, and the ring-shaped antenna body 110 is stored in the storage space.
The dial ring 111 displays a scale (index) for indicating the time by the hands 21, 22, and 23, a number indicating a time zone time difference, and an abbreviation indicating a time zone city name.

[Input device]
The input device 70 as an external operation means of the present invention includes a crown 71 and three buttons 72, 73 and 74. When the input device 70 is operated, processing corresponding to the manual operation is executed.
Specifically, when the crown 71 is pulled by one step, the currently set time zone is displayed with the pointer 21 (second hand). In order to change the currently set time zone, when the crown 71 is rotated to the right in this state, the hands 21 are moved clockwise, and the time zones incremented by “+1” are sequentially selected. On the other hand, when the crown 71 is rotated counterclockwise in this state, the time zone decremented by “−1” is selected. Then, by pushing the crown 71, the selected time zone is determined.
That is, by rotating the crown 71, the pointer 21 (second hand) also moves in conjunction with it, and the time zone is manually selected by adjusting the pointer 21 to the time zone difference and city name displayed on the dial ring 111. it can.
When the crown 71 is rotated in a state where the crown 71 is pulled down, the hands 21, 22, and 23 can be moved, and the current time display can be manually corrected.

When the button 72 is pressed, processing according to the situation, such as cancellation of various operation modes and cancellation of reception processing, is executed.
When the button 73 is pressed for a first set time (for example, 3 seconds or more and less than 6 seconds) and then released, manual reception processing (forced reception processing) in the timekeeping mode is executed. During the reception process, the indicator hand 24 indicates “1” indicating the time measurement mode.
When the button 73 is pressed and released for a second set time (for example, 6 seconds or longer) longer than the first set time, manual reception processing (forced reception processing) in the positioning mode is executed. During the reception process, the indicator hand 24 indicates “4+” indicating the positioning mode.

Further, when the button 73 is pressed for a short time (for example, less than 3 seconds) shorter than the first set time and released, a result display process for displaying the result of the previous reception process is performed. That is, the most recently received mode is indicated by the indicator hand 24 indicating “1” or “4+”. The reception result is indicated by the pointer 21 indicating “Y” (reception success) or “N” (reception failure). In this embodiment, “Y” is set at the 12-second position, and “N” is set at the 18-second position.
The processing executed when the buttons 72, 73, 74 are pressed is not limited to the above, and may be set as appropriate according to the function of the electronic timepiece 1.

[solar panel]
A solar panel 135 that performs photovoltaic power generation is provided between the dial plate 11 and the ground plate 125 to which the driving mechanism 140 is attached. The solar panel 135 is a circular flat plate in which a plurality of solar cells (photovoltaic elements) that convert light energy into electric energy (electric power) are connected in series. The solar panel 135 also has a sunlight detection function. The dial plate 11, the solar panel 135, and the base plate 125 are formed with a hole through which the pointer shaft 27 passes and an opening of the calendar small window 15.

[Drive mechanism]
The drive mechanism 140 is attached to the ground plane 125 and is covered with the circuit board 120 from the back side. The drive mechanism 140 includes a step motor for driving the pointer 21 (second hand), a step motor for driving the pointer 22 (minute hand) and the pointer 23 (hour hand), a step motor for driving the indicator hand 24, and hands 25 and 26. And a step motor to be driven. Furthermore, since the electronic timepiece 1 includes a date wheel for displaying the date in the calendar small window 15, the electronic timepiece 1 also includes a step motor for driving the date wheel.

[Circuit board]
The circuit board 120 includes a charging circuit 80, a storage device 60, a receiving device (receiving module) 122 as a receiving means of the present invention, and a control device 40. Further, a secondary battery 130 such as a lithium ion battery is disposed on the side of the circuit board 120 where the receiving device 122 is provided. The charging circuit 80 charges the secondary battery 130 with the power generated by the solar panel 135. Further, the circuit board 120 and the antenna body 110 are connected by using antenna connection pins 115.

[Antenna body]
The antenna body 110 is formed by using a ring-shaped dielectric as a base material, and forming a metal antenna pattern on the base material by plating or silver paste printing. The antenna body 110 is disposed on the outer periphery of the dial plate 11, disposed on the inner peripheral surface side of the bezel 32, and further covered with a dial ring 111 made of plastic and a cover glass 33, so that the antenna body 110 is good. Secure reception. As the dielectric, a dielectric material that can be used at high frequencies, such as titanium oxide, can be mixed with the resin and molded, and this makes it possible to further reduce the size of the antenna in combination with the shortening of the wavelength of the dielectric.

  The antenna body 110 is fed through a feeding point, and an antenna connection pin 115 disposed on the back side of the antenna body 110 is connected to the feeding point. The antenna connection pin 115 is a pin-shaped connector made of metal, protrudes from the circuit board 120, passes through an insertion hole opened in the ground plate 125, and is inserted into the storage space. Thereby, the circuit board 120 and the antenna body 110 inside the storage space are connected by the antenna connection pins 115.

[Circuit configuration of electronic watch]
FIG. 3 is a block diagram showing a circuit configuration of the electronic timepiece 1. The electronic timepiece 1 includes a receiving device 122, a control device 40, a time measuring device 50 (time measuring means), a storage device 60 (storage means), and an input device 70 (external operation means). The control device 40 includes reception control means 41 and time correction means 42. The reception control means 41 includes a reception mode setting unit 411, a time measurement mode reception unit 412, a positioning mode reception unit 413, and a leap second reception control unit 414.

[Receiver]
The receiving device 122 is a load driven by the electric power stored in the secondary battery 130. When driven by the control device 40, the receiving device 122 receives a satellite signal transmitted from the GPS satellite 100 through the antenna body 110. Then, when receiving the satellite signal is successful, the receiving device 122 transmits information such as the acquired orbit information and GPS time information to the control device 40. On the other hand, when the reception of the satellite signal fails, the receiving device 122 transmits information to that effect to the control device 40. Note that the configuration of the receiving device 122 is the same as the configuration of a known GPS receiving circuit, and a description thereof will be omitted.

[Time measuring device]
The time measuring device 50 includes a crystal resonator driven by the power stored in the secondary battery 130 and updates time data using a reference signal based on an oscillation signal of the crystal resonator.

[Storage device]
As illustrated in FIG. 4, the storage device 60 includes a time data storage unit 600, a time zone data storage unit 680, and a scheduled reception time storage unit 690.
The time data storage unit 600 stores reception time data 610, leap second update data 620, internal time data 630, clock display time data 640, and time zone data 650.
The reception time data 610 stores time information (GPS time) acquired from the satellite signal. The reception time data 610 is normally updated every second by the timing device 50, and is corrected by the acquired time information (GPS time) when a satellite signal is received.
The leap second update data 620 stores at least current leap second data. That is, in the subframe 4 and page 18 of the satellite signal, “current leap second”, “leap second update week”, “leap second update date”, and “leap second after update” are included as data relating to the leap second. Each data is included. Among these, in the present embodiment, at least “current leap second” data is stored in the leap second update data 620.

  The internal time data 630 stores internal time information. This internal time information is updated by the GPS time stored in the reception time data 610 and the “current leap second” stored in the leap second update data 620. That is, UTC (Coordinated Universal Time) is stored in the internal time data 630. When the reception time data 610 is updated by the timing device 50, the internal time information is also updated.

  The clock display time data 640 stores time data obtained by adding the time zone data (time difference information) of the time zone data 650 to the internal time information of the internal time data 630. The time zone data 650 is set with position information obtained when the user manually sets the time zone data 650 or when receiving in the positioning mode.

  The time zone data storage unit 680 stores position information (latitude, longitude) and time zone (time difference information) in association with each other. For this reason, when the position information is acquired in the positioning mode, the control device 40 can acquire the time zone data based on the position information (latitude, longitude).

  The time zone data storage unit 680 further stores a city name and time zone data in association with each other. Therefore, as described above, when the user selects a city name for which the local time is desired by operating the input device 70 such as the crown 71, the control device 40 sets the time zone data storage unit 680 by the user. A city name is searched, time zone data corresponding to the city name is acquired and set in the time zone data 650.

  The scheduled reception time storage unit 690 stores the scheduled reception time for executing the scheduled reception process (the reception process in the scheduled timing mode) by the timing mode receiving unit 412. As this scheduled reception time, the time when the forced reception was successful by operating the button 73 last time is stored.

  The storage device 60 does not store orbit information (almanac, ephemeris) of the position information satellite. The electronic timepiece 1 is a wristwatch, and the capacity of the storage device 60 is also limited, and the capacity of the secondary battery 130 is also limited, so that it is difficult to perform long-time reception for acquiring trajectory information. Because. Therefore, the reception processing of the electronic timepiece 1 is performed in a cold start state that does not have orbit information.

[Control device]
The control device 40 is composed of a CPU that controls the electronic timepiece 1. The control device 40 includes reception control means 41 that controls the reception device 122 to execute reception processing. The reception control means 41 includes a reception mode setting unit 411, a time measurement mode reception unit 412, a positioning mode reception unit 413, and a leap second reception control unit 414. In addition, the control device 40 includes time correction means 42 that acquires time information included in the satellite signal received by the reception device 122 and corrects the time counted in the reception time data 610 by this time information.

[Reception mode setting section]
The reception mode setting unit 411 selects and sets the reception mode of the satellite signal by the reception device 122 from the time measurement mode or the positioning mode. Specifically, as described later, the reception mode is set by the time when the button 73 is pressed.

[Timekeeping mode receiver]
The timekeeping mode reception unit 412 may be operated by an automatic reception process or a manual reception process.
The automatic reception processing is performed by operating the receiving device 122 when the scheduled reception time set in the scheduled reception time storage unit 690 is reached and when the generated voltage or generated current of the solar panel 135 is equal to or higher than the set value. Performs reception processing in timekeeping mode.
That is, the timekeeping mode receiving unit 412 operates the receiving device 122 when the clocked time, specifically, the internal time data 630 reaches the scheduled reception time stored in the scheduled reception time storage unit 690. This is called scheduled reception processing.
The timekeeping mode receiver 412 operates the receiving device 122 when the generated voltage or generated current of the solar panel 135 is equal to or higher than the set value and it can be determined that the solar panel 135 is irradiated with sunlight outdoors. Note that the number of processes for operating the receiving device 122 in the power generation state of the solar panel 135 may be limited to once a day.
On the other hand, when the user presses and releases the button 73 of the input device 70 for the first set time (3 seconds or more and less than 6 seconds), the timekeeping mode receiving unit 412 is activated by manual reception processing.

  The timekeeping mode receiving unit 412 acquires at least one GPS satellite 100 by the receiving device 122, receives a satellite signal transmitted from the GPS satellite 100, and acquires time information. When the time correction unit 42 succeeds in acquiring the time information, the time correction unit 42 corrects the reception time data 610 with the acquired time information.

[Positioning mode receiver]
When the user presses and releases the button 73 of the input device 70 for the second set time (6 seconds or more), the positioning mode receiving unit 413 operates the receiving device 122 to perform reception processing.
The positioning mode receiving unit 413 receives at least three, preferably four or more GPS satellites 100 and receives satellite signals transmitted from the respective GPS satellites 100 in order to perform reception processing in the positioning mode. The time information is acquired, and the position information is calculated and acquired. When the position information is successfully acquired, the control device 40 acquires time zone data (time difference information) from the time zone data storage unit 680 based on the acquired position information (latitude, longitude), and time zone data 650. To remember.
For example, since Japan Standard Time (JST) is a time (UTC + 9) advanced by 9 hours with respect to UTC, when the position information acquired in the positioning mode is Japan, the control device 40 includes a time zone data storage unit. The time difference information (+9 hours) in Japan standard time is read from 680 and stored in the time zone data 650. Therefore, the clock display time data 640 is a time obtained by adding the time zone data to the internal time data 630 which is UTC.

[Leap second reception control unit]
The leap second reception control unit 414 performs reception control of leap second information as described later.

[Time correction means]
When the reception control unit 41 acquires time information and the reception time data 610 is updated, the time adjustment unit 42 moves the hands 21, 22, and 23 based on the clock display time data 640, and displays the time display. Update.

[Navigation message (GPS satellite)]
Here, the navigation message of the satellite signal transmitted from the GPS satellite 100 including the acquired information will be described. The navigation message is modulated into satellite radio waves as 50 bps data.
FIG. 5A to FIG. 5C are diagrams for explaining the configuration of the navigation message.
As shown in FIG. 5 (A), the navigation message is configured as data with a main frame having a total number of 1500 bits as one unit. The main frame is divided into five sub-frames 1 to 5 each having 300 bits. Data of one subframe is transmitted from each GPS satellite 100 in 6 seconds. Accordingly, data of one main frame is transmitted from each GPS satellite 100 in 30 seconds.

Subframe 1 includes week number data (WN: week number) and satellite correction data.
The week number data is information representing a week including the current GPS time information, and is updated on a weekly basis.
The subframes 2 and 3 include ephemeris parameters (detailed orbit information of each GPS satellite 100). The subframes 4 and 5 include almanac parameters (general orbit information of all GPS satellites 100).

  Further, subframes 1 to 5 include, from the beginning, a TLM (Telemetry) word storing 30-bit TLM (Telemetry word) data and a HOW word storing 30-bit HOW (hand over word) data. It is.

  Therefore, TLM words and HOW words are transmitted from the GPS satellite 100 at intervals of 6 seconds, whereas week number data, satellite correction data, ephemeris parameters, and almanac parameters are transmitted at intervals of 30 seconds.

  As shown in FIG. 5B, the TLM word includes preamble data, a TLM message, reserved bits, and parity data.

  As shown in FIG. 5C, the HOW word includes GPS time information called TOW (Time of Week, also referred to as “Z count”). In the Z count data, the elapsed time from 0 o'clock every Sunday is displayed in seconds, and it returns to 0 at 0 o'clock on the next Sunday. That is, the Z count data is information in units of seconds indicated every week from the beginning of the week. This Z count data indicates GPS time information at which the first bit of the next subframe data is transmitted.

Therefore, the electronic timepiece 1 can acquire date information and time information by acquiring the week number data included in the subframe 1 and the HOW word (Z count data) included in the subframes 1 to 5. However, when the electronic timepiece 1 has previously acquired week number data and is counting the elapsed time from the time when the week number data was acquired internally, the electronic timepiece 1 does not acquire the week number data. Current over-number data can be obtained.
Therefore, the electronic timepiece 1 only needs to acquire the week number data of the subframe 1 only when the week number data (date information) is not stored therein after resetting or when the power is turned on. When the week number data is stored, the electronic timepiece 1 can obtain the current time by acquiring the TOW transmitted every 6 seconds. For this reason, the electronic timepiece 1 usually acquires only TOW as time information.

[Leap second information]
As described above, the “leap second information” is obtained by storing the “current leap second” information included in the subframe 4 and the page 18. The subframe 4 and page 18 also include information on “leap second update week, update date, leap second after update”, and when the leap second is updated, the timing is notified in advance. . When the leap second is updated, it is usually executed on the last day of December or June. For this reason, if the electronic timepiece 1 performs processing for acquiring leap second information and receives subframe 4 and page 18 before a certain period before the end of December and the end of June, the presence / absence and update of the leap second are present. The leap second correction value can be acquired.

[Receive processing]
Next, the reception process of the electronic timepiece 1 will be described with reference to the flowcharts of FIGS.
FIG. 6 is a flowchart showing a processing procedure at the time of manual reception, and is executed when the button 73 is pressed while the normal time is displayed by the hands 21, 22, 23 (normal time display mode). .

When the button 73 is pressed, the reception control means 41 determines whether or not a manual reception operation has been performed (S1).
When the user presses the button 73 for the first set time (3 seconds or more and less than 6 seconds) or the second set time (6 seconds or more and less than 10 seconds), the reception control means 41 returns “Yes” in step S1. judge.
On the other hand, if the button 73 is pressed for less than the first set time (less than 3 seconds), that is, in the reception result display mode, the reception control means 41 determines “No” in step S1. In this case, since the manual reception process is not instructed, the manual reception process in FIG. 6 ends, and for example, a reception result display process is executed.

  The reception control means 41 determines that it is the time measuring mode when the user presses the button 73 for the first set time (3 seconds or more and less than 6 seconds). That is, when the button 73 is pressed for 3 seconds, the pointer (second hand) 21 moves to the 0 second position, and the indicator hand 24 indicates “1” as shown in FIG. For this reason, the user can recognize that the time mode reception process has been selected, and when the button 73 is released at this timing, the selection of the time mode is confirmed. For this reason, the reception control means 41 determines No in step S2, operates the time measurement mode reception unit 412 and executes time measurement mode reception processing (S10).

  The reception control means 41 determines that the positioning mode is in effect when the user presses the button 73 for the second set time (6 seconds or longer). That is, when the button 73 is pressed for 6 seconds, the pointer (second hand) 21 moves to the 30-second position, and the indicator hand 24 indicates “4+” as shown in FIG. For this reason, the user can recognize that the positioning mode reception processing has been selected, and when the button 73 is released at this timing, the selection of the positioning mode is confirmed. For this reason, the reception control means 41 determines Yes in step S2, operates the positioning mode reception unit 413, and executes the positioning mode reception process (S30).

[Reception processing in timekeeping mode]
Next, the timekeeping mode reception process in step S10 will be described with reference to FIG.
The timekeeping mode receiving unit 412 of the reception control means 41 starts reception in the timekeeping mode as shown in FIG. 7 (S11). That is, the timekeeping mode receiving unit 412 performs a search for operating the receiving device 122 to acquire the GPS satellite 100 and acquires at least one GPS satellite 100. Then, when the timekeeping mode reception unit 412 captures the GPS satellite 100, the reception device 122 starts reception of the satellite signal and acquires time information.

  Next, the timekeeping mode receiving unit 412 determines whether the satellite signal has been successfully received within the set time (for example, within 30 seconds) (S12). When it is determined No in step S12, the timekeeping mode reception unit 412 ends the reception process (S16). As described above, since GPS time information (TOW) is transmitted every 6 seconds, there is a low possibility of successful reception even if it continues to be received for a set time (30 seconds) or longer. If the time is exceeded, the reception process is terminated.

  On the other hand, the timekeeping mode receiving unit 412 determines that the reception is successful when it is possible to acquire the time information by receiving the satellite signal, and when it is determined that the acquired time information is correct by comparing with the internal time. (Yes in step S12).

  The timekeeping mode reception unit 412 updates the reception time data 610 based on the acquired time information. Then, the internal time information stored in the internal time data 630 is updated with the GPS time stored in the reception time data 610 (S13). At this time, if the “current leap second” has already been received and is stored in the leap second update data 620, the “current leap second” is also used to update the internal time information (S13).

Next, the timekeeping mode reception unit 412 determines whether leap second information has already been received in the previous reception processing (S14).
The timekeeping mode receiving unit 412 determines that it is necessary to newly receive leap second information when the following leap second reception conditions are satisfied, and determines “No” in S14.
That is, the time measurement mode reception unit 412 determines “No” in S14 because the leap second information is not stored in the leap second update data 620 immediately after the system reset or the like and the internal time data 630 is stored. This is a case where the date according to the internal time information is a leap second reception period and the leap second information has not been successfully received during that period.
In the present embodiment, the leap second reception period is set every six months. That is, at present, the update of leap seconds is at least every six months, and in recent years, it is about once a year to several years. The first priority date of the specific leap second update timing is the last day of December and June. Further, the leap second information includes information about the next leap second update date and the leap second after the update.
Therefore, if leap second information is received every six months (specifically, June and December), it can also be determined whether or not there is a leap second update schedule in the next six months.
Therefore, the timekeeping mode reception unit 412 has the month and day of the internal time information stored in the internal time data 630 as June 1 to 30 and December 1 to 31 and is leap in that period. If the second information has not been successfully received, it is determined that the leap second information has not been received, and “No” is determined in step S14. Since the leap second reception period may be a half year before the leap second update date, it is not limited to June and December, but may be set every six months, such as July and January, August and February. That's fine.

  When the timekeeping mode receiving unit 412 determines “Yes” in step S14, the display of the hands 21, 22, and 23 is updated (S15). That is, since the reception time data 610 and the internal time data 630 are updated in S13, the time data obtained by adding the time zone data (time difference information) of the time zone data 650 to the internal time information of the internal time data 630 is stored. The clock display time data 640 is updated. Then, the time correction means 42 controls the drive mechanism 140 to move the hands 21, 22, and 23, updates the displayed time (S15), and ends the time measurement mode reception process S10 (S16).

  On the other hand, if the timekeeping mode receiving unit 412 determines “No” in step S14, whether the subframe 4, page 18, that is, the frame in which the leap second information is transmitted has been received in the current reception process started in step S11. Is determined (S17).

If the time measurement mode reception unit 412 determines No in step S17, the leap second reception control unit 414 is operated to execute leap second reception control.
The leap second reception control unit 414 first determines whether it is the time to receive leap second information (S18). The reception timing is a timing at which data of subframe 4 and page 18 including the leap second information is transmitted. This timing can be determined as follows. That is, the GPS time is managed in units of one week, and the Z count represents an elapsed time from the beginning of the week (Sunday 00: 00: 0). Further, subframes 1 to 5 are repeatedly transmitted in order from the start of the week, and pages 1 to 25 are transmitted in order in subframes 4 and 5. Therefore, the data of subframe 4 and page 18 is the 89th subframe from the start of the week, and the time at that time is specified as shown in FIG. Subsequent transmission timing of subframe 4 and page 18 can also be specified by the time from the beginning of the week. Therefore, if the reception process is performed when the GPS time as the reception time data 610 reaches the transmission timing of FIG. 9, leap second information can be received. In consideration of the time from the start of the reception process to the time when the satellite is searched and acquired, it is preferable to start the reception process about 20 seconds before the transmission timing.
Accordingly, when the leap second reception control unit 414 operates the receiving device 122 in step S11 to receive the satellite signal, the leap second information is transmitted next by confirming the subframe or page of the satellite signal. Can grasp the timing.

When it is determined Yes in step S18, the leap second reception control unit 414 starts receiving leap second information (S19).
The leap second reception control unit 414 determines whether the reception of the frame satellite signal in which the subframe 4, page 18, that is, the leap second information is transmitted, within the set time (for example, within 30 seconds) is successful (S20).
And when it determines with Yes by step S20 and when it determines with Yes by the said step S17, the reception control means 41 performs internal time correction with the acquired "current leap second information" (S21). That is, the “current leap second information” acquired is stored in the leap second update data 620. Then, the internal time data 630 is updated and corrected with new leap second information.
Next, the reception control means 41 updates the clock display time data 640 using the internal time data 630 and the time zone data 650, and the time correction means 42 updates the time display by the hands 21, 22, and 23 ( S15).

  On the other hand, if it is determined No in step S20, since the leap second information has not been acquired, the reception control means 41 does not update the leap second update data 620, but the internal time data 630 corrected in S13 and the time. The time data for clock display 640 is updated using the zone data 650, and the time correction means 42 updates the time display by the hands 21, 22, and 23 (S15).

  When the time display is updated by the hands 21, 22, and 23 in step S15, the timekeeping mode reception process S10 ends (S16).

[Positioning mode reception processing]
Next, the positioning mode reception process in step S30 will be described with reference to FIG.
As shown in FIG. 8, the positioning mode receiving unit 413 of the reception control means 41 starts receiving the positioning mode (S31). That is, the positioning mode receiving unit 413 performs a search for operating the receiving device 122 to acquire the GPS satellites 100, and acquires at least three GPS satellites 100. Then, when the positioning mode receiving unit 413 captures the GPS satellite 100, the receiving device 122 starts receiving the satellite signal.

  Next, the positioning mode receiving unit 413 determines whether the satellite signal has been successfully received within the set time (for example, within 2 minutes) (S32). That is, the positioning mode receiving unit 413 determines Yes in step S32 when it receives three or more satellite signals within the set time and the position information can be calculated from the received satellite signals.

  Since the positioning mode receiving unit 413 can also acquire time information when the satellite signal is successfully received, the reception mode data 610 is updated based on the acquired time information. Then, the internal time information stored in the internal time data 630 is updated with the GPS time stored in the reception time data 610 (S33). At this time, if the “current leap second” has already been received and stored in the leap second update data 620, the internal time information is updated using the “current leap second” (S33).

Next, the positioning mode receiving unit 413 determines whether or not the leap second information has already been received in the previous receiving process, similarly to the time measuring mode receiving process S10 (S34).
On the other hand, if the positioning mode receiving unit 413 determines “No” in step S34, it is determined whether subframe 4, page 18, that is, a frame in which leap second information is transmitted in the current reception process started in step S31. Determine (S35).

If the positioning mode receiving unit 413 determines Yes in step S35, the positioning mode receiving unit 413 corrects the internal time with the acquired “current leap second information” (S36).
If it is determined No in step S35, the position information has been acquired, but the leap second information has not been acquired. Therefore, the positioning mode reception unit 413 does not update the leap second update data 620.

Next, the positioning mode reception unit 413 determines the time zone based on the data stored in the time zone data storage unit 680 based on the position information acquired in S32. Then, the time zone data 650 is corrected with the determined time zone (S37).
Then, the positioning mode reception unit 413 updates the clock display time data 640 using the corrected time zone data 650 and the internal time data 630 updated with the received time information, and the time correction means 42 , 22, and 23 are updated (S38).

  If it is determined as “Yes” in step S34, the positioning mode reception unit 413 uses the current leap second information stored in the leap second update data 620 when the internal time is corrected in step S33, and the internal time data 630 is stored. Since it has been updated, steps S35 and S36 are not executed, time zone correction in step S38 and display update processing in S38 are performed, and positioning mode reception processing S30 is terminated.

When the time display is updated by the hands 21, 22, and 23 in step S38, the positioning mode reception process S30 ends (S39).
If it is determined as “No” in step S32, the position information has not been acquired, so the positioning mode receiving unit 413 ends the processing of the positioning mode receiving process S30 without executing steps S33 to S38. (S39).

[Indicator hand instructions]
Next, the display of the indicator hand 24 during reception processing will be described.
When the timekeeping mode receiving process S10 is executed, the indicator hand 24 indicates “1” on the scale 112 as shown in FIG. 10, and when the positioning mode receiving process S30 is executed, the indicator hand 24 is shown in FIG. In addition, “4+” of the scale 112 is instructed. Further, while waiting for the leap second information reception timing in S18 of the timekeeping mode reception process S10 and during the leap second information reception in S19, the indicator hand 24 is positioned at the end of the scale 112 as shown in FIG. Specifically, the horizontal position of “4+” is designated.
By the instruction of the indicator hand 24, the user can grasp which reception process of time measurement, positioning, or leap second is being executed. Therefore, the indicator needle 24 and the scale 112 constitute reception state display means for displaying the reception state.

[Receive result instructions]
The reception control means 41 indicates the result of each reception process by moving the pointer (second hand) 21 to either the Y position (12 seconds position) or the N position (18 seconds position).
That is, when it is determined that reception is successful in each reception process, the pointer 21 is moved to the Y position (12-second position). Therefore, FIG. 10 is an example of successful reception in the timekeeping mode, and FIG. 12 is an example of successful reception of leap second information.
On the other hand, when it is determined that the reception has failed in each reception process, the pointer 21 is moved to the N position (18-second position). Therefore, FIG. 11 is an example in which reception has failed in the positioning mode.

The display of the reception result continues for a certain time, for example, 5 seconds. Thereafter, when the reception is successful, the time display indicated by the hands 21, 22, and 23 is updated using the acquired time information and the like. On the other hand, if the reception fails, the reception time data 610, the internal time data 630, and the clock display time data 640 are not updated, so that the time display device is not updated without updating the time display indicated by the hands 21, 22, and 23. The original time display timed at 50 is restored.
As a result, the user can confirm the instruction of the indicator needle 24 and the pointer 21 to confirm the reception processing mode and whether the reception has succeeded or failed.
Further, when the user presses and releases the button 73 for less than 3 seconds, the previous reception result is displayed using the indicator hand 24 and the pointer 21.

[Effects of First Embodiment]
The electronic timepiece 1 (satellite signal receiving device) according to the first embodiment of the present invention described above has the following effects.
That is, the leap second information reception process is executed only in the timekeeping mode reception process S10, and is not executed in the positioning mode reception process S30. For this reason, when the positioning mode reception process S30 is performed after moving to a place with a different time zone, the local time can be displayed immediately if the position information can be acquired without entering the leap second information reception standby state. For this reason, user convenience can be improved.

  In addition, when the timekeeping mode reception process S10 by the timekeeping mode reception unit 412 is executed, if the leap second reception condition is satisfied, the leap second reception control unit 414 is activated and the reception control of the leap second information is automatically performed. Is executed automatically. For this reason, it is not necessary for the user to instruct reception of leap second information, and convenience can be improved. Further, by receiving leap second information, it is possible to display an accurate time reflecting the leap second information.

  Since the indicator hand 24 indicates that leap second information is being received, the user can easily grasp the reception state. For this reason, the electronic timepiece 1 can be placed in an environment suitable for receiving leap second information, and the probability of successful acquisition of leap second information can be improved.

  In the present embodiment, even when the leap second reception control unit 414 is performing leap second information reception processing, even if an instruction to interrupt the reception processing is given by operating the button 72, the leap second reception control unit 414 does not accept the interruption processing. The second information reception process continues. For this reason, even when the user gives an interruption instruction by mistake, the reception process can be continued and the leap second information can be received reliably.

  When the leap second information is acquired by the leap second reception control unit 414, the internal time is corrected in step S21, so that the time display accuracy by the hands 21, 22, and 23 can be improved.

[Second Embodiment]
Next, 2nd Embodiment of this invention is described based on drawing.
FIG. 13 is a flowchart showing a procedure of timekeeping mode reception processing S10A of the electronic timepiece according to the second embodiment of the invention.
The electronic timepiece of the second embodiment is different from the first embodiment in the leap second information reception waiting process of the timekeeping mode reception process S10A. Since the processing other than the leap second information reception standby in the timekeeping mode reception processing S10A and the positioning mode reception processing are the same as those in the first embodiment, the same numbers are assigned and description thereof is omitted. Therefore, only differences from the first embodiment will be described in detail.

[Timekeeping mode reception processing]
In the timekeeping mode reception process S10A of the second embodiment, the processing contents of steps S11 to S21 shown in FIG. 13 are the same as those of the timekeeping mode reception process S10 of the first embodiment, and a description thereof will be omitted.
In the timekeeping mode reception process S10A, if “No” is determined in step S17, the display of the hands 21, 22, and 23 is updated in step S22 (S22). In the display update in step S22, since the current leap second information has not been received, the leap second is displayed at a time when it is not corrected.

Next, the leap second reception control unit 414 counts down the remaining time until the reception timing in the standby state until the reception timing of the leap second information in step S18 (S23).
Specifically, the pointer 21 is moved to the 42-second position when the remaining time is 18 minutes ago, and is moved to the 43-second position when it is 17 minutes ago. Thereafter, the position moves to 44 seconds at 17 minutes, 43 seconds at 16 minutes, 57 seconds at 3 minutes before, 58 seconds at 2 minutes before, 59 seconds at 1 minute before. That is, the 0-second position is set to have a remaining time of 0 minutes, and the pointer 21 is advanced by 1 second each time the remaining time decreases by 1 minute. Therefore, the indicator hand 24 and the pointer 21 constitute a leap second standby state display means.

When the reception timing of leap second information is reached in step S18, the leap second reception control unit 414 ends the countdown display (S23) and starts receiving leap second information (S19).
If it is determined in step S20 that the subframe 4 and page 18 including leap second information within the set time have been received (Yes in S20), the reception control unit 41 performs steps S21, The process of S15 is performed.
On the other hand, if “No” is determined in step S20, the display update process is performed in step S22, and thus the reception control unit 41 ends without performing the process of step S15 (S16).

[Effects of Second Embodiment]
The present embodiment has the following effects in addition to the effects of the first embodiment.
In this embodiment, when it is determined No in step S17 of the timekeeping mode reception process S10A, the display is updated by the hands 21, 22, and 23 (S22), and then the state shifts to a leap second information reception standby state. ing. For this reason, since the current time can be displayed while waiting for the reception timing of the leap second information, the user can confirm the current time at an early stage and can improve convenience. In addition, since the leap second is not corrected at the current time displayed at this time, an error corresponding to the leap second occurs. However, the error is about ten or more seconds, and can be used practically without any problem.

  Further, since the remaining time until the reception timing of the leap second information is displayed in the countdown display (S23), the user can grasp the time when the reception of the leap second information is started. For this reason, the user can move to a place where it is easy to receive a satellite signal having an open sky outdoors in accordance with the reception timing of leap second information, and the probability of successful reception of leap second information can be improved. Further, since the reception timing of leap second information can be grasped, it is not necessary to maintain the electronic timepiece 1 in a state in which satellite signals are easily received until the reception timing is reached, and the convenience of the user can be improved.

[Third Embodiment]
Next, an electronic timepiece according to a third embodiment of the invention will be described with reference to the drawings.
FIG. 14 is a flowchart showing a manual reception processing procedure of the electronic timepiece according to the third embodiment of the invention.
In FIG. 14, the processing in steps S1, S2, S10, and S30 is the same as that in the first embodiment, and a description thereof will be omitted.
In 3rd Embodiment, when it determines with "No" by step S2, it is determined whether it is the acquisition mode of leap second information (S3).

That is, in the third embodiment, when the user presses and releases the button 73 for the first set time (for example, 3 seconds or more and less than 6 seconds), it is determined No in step S3 and the manual reception process (forced reception) in the timekeeping mode is determined. Process) is executed (S10). During the reception process, the indicator hand 24 indicates “1” indicating the time measurement mode.
Further, when the button 73 is pressed and released for a second set time (for example, 6 seconds or more and less than 10 seconds) longer than the first set time, Yes is determined in step S2 and manual reception processing in the positioning mode (forced reception processing) Is executed (S30). During the reception process, the indicator hand 24 indicates “4+” indicating the positioning mode.
Further, when the button 73 is pressed and released for a third set time longer than the second set time (for example, 10 seconds or more), Yes is determined in step S3, and the leap second information is manually received by the leap second reception control unit 414 ( Forced reception processing) is executed (S40). During the leap second information reception process, the indicator hand 24 indicates the corner of the scale 112 as in FIG. 12 of the first embodiment.

[Leap second information reception processing]
Next, the leap second information reception process S40 will be described with reference to FIG.
The leap second information reception process S40 is different from the time measurement mode reception process S10 of the first embodiment shown in FIG. 7 in that it does not perform the process (S14) for determining whether the leap second information has already been received. Other processing is the same.
That is, when starting the leap second information reception process S40, the reception control unit 41 operates the time measurement mode reception unit 412 to start reception of the time measurement mode (S41). Then, it is determined whether or not the reception is successful within a set time (for example, 30 seconds) (S42). If the reception fails in S42, it is expected that the electronic timepiece 1 is placed in a place where satellite signals cannot be received, such as indoors and underground shopping streets. For this reason, there is a high possibility of failure even if the leap second information reception process is performed, so the reception control means 41 ends the leap second information reception process S40 (S50).

  On the other hand, when it is determined Yes in S42, the reception control unit 41 corrects the internal time (S43), and determines whether the subframe 4 and page 18 are received due to reception of the current timekeeping mode (S44). In the timekeeping mode reception process S10, it was determined whether the leap second information has already been received in step S14. However, in the leap second information reception process S40, it is emphasized that the user has performed an operation of receiving leap second information. Even if the leap second information has already been received, the leap second information reception process is performed again.

When it is determined No in step S44, the reception control unit 41 waits until the leap second reception control unit 414 is activated and the leap second reception timing is reached (S45). If it is determined Yes in S45, the leap second reception control unit 414 starts receiving leap second information (S46). Then, the leap second reception control unit 414 determines whether the subframe 4 and the page 18 are received within a set time (for example, 30 seconds) (S47).
When it is determined Yes in steps S44 and S47, the reception control unit 41 corrects the internal time with the acquired “current leap second information” (S48), and the time correction unit 42 displays the time by the hands 21, 22, and 23. Is updated (S49).
On the other hand, when it is determined No in step S47, the reception control unit 41 cannot acquire the leap second information, so the internal time is not corrected with the leap second information, and the time correction unit 42 does not correct the time according to the hands 21, 22, and 23. The display is updated (S49).
After the process of step S49 is complete | finished, the leap second information reception process S40 is complete | finished (S50).
In the present embodiment, as in the second embodiment, the display by the hands 21, 22, and 23 is updated or the remaining time until the reception timing of the leap second information is received during the leap second information reception standby in step S45. Time may be counted down.

[Effects of Third Embodiment]
The present embodiment has the following effects in addition to the effects of the above-described embodiment.
In the present embodiment, since the leap second information reception process S40 is executed by a user's manual operation, leap second information can be received at a timing desired by the user. For this reason, the probability that acquisition of leap second information is successful can be improved. That is, when leap second information is received in the timekeeping mode reception process S10, the environment may not necessarily be suitable for receiving leap second information, and acquisition of leap second information may fail. On the other hand, in this embodiment, since the leap second information is received by the user's intention, the success rate of obtaining leap second information can be improved.

[Modification]
It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.

  In each of the above embodiments, when the reception process is instructed by pressing the button 72 during each reception process of the time measurement mode reception process S10, S10A, the positioning mode reception process S30, and the leap second information reception process S40. Each reception process may be interrupted. In the first embodiment, the reception process is not interrupted even when the button 72 is pressed during the leap second information reception process (leap second information reception standby and reception). On the other hand, if the reception process is interrupted when the button 72 is pressed during the reception process such as leap second information, control according to the user's intention can be performed, and the operability can be improved.

In the timekeeping mode reception processing S10, S10A and positioning mode reception processing S30, the leap second information was received when it was the transmission timing of subframe 4 and page 18 including leap second information during the reception of the satellite signal. In this case, it may be determined whether the leap second information needs to be updated, and the time of the time measuring means may be updated with the acquired leap second information.
For example, in the positioning mode reception process S30A of the modified example shown in FIG. 16, the positioning mode reception unit 413 executes a determination process S35 as to whether or not the subframe 4 and page 18 have been received after step S33. If the positioning mode receiving unit 413 determines “Yes” in S35, the positioning mode receiving unit 413 determines whether the acquired “current leap second information” needs to be updated (S60). In S60, the acquired leap second information is compared with the information stored in the leap second update data 620. If the values are the same, “No” is determined, and if the values are different, “Yes” is determined.
As a result, when the leap second information is received, the leap second information can be updated, and the leap second information receiving process by the leap second reception control unit 414 is not performed separately, and can be updated to an accurate time.

  Although the GPS satellite 100 has been described as an example of the position information satellite, the present invention is not limited to this. For example, as the position information satellite, a satellite used in other global public navigation satellite systems (GNSS) such as Galileo (EU), GLONASS (Russia), and Beidou (China) can be applied. In addition, a geostationary satellite such as a geostationary satellite type satellite navigation augmentation system (SBAS) or a satellite that can be searched only in a specific region such as a quasi-zenith satellite can be applied.

  DESCRIPTION OF SYMBOLS 1 ... Electronic timepiece, 24 ... Indicator hand, 112 ... Scale, 41 ... Reception control means, 42 ... Time adjustment means, 50 ... Time measuring device, 60 ... Memory | storage device, 70 ... Input device, 100 ... GPS satellite, 122 ... Receiver (Receiving means) 411 ... reception mode setting section, 412 ... time measurement mode reception section, 413 ... positioning mode reception section, 414 ... leap second reception control section.

Claims (11)

Receiving means for receiving satellite signals transmitted from the position information satellite;
Receiving control means for controlling the receiving means,
The reception control means includes
The receiving mode of the receiving means is selected and set from a plurality of receiving modes including a time measuring mode for acquiring time information based on the satellite signal and a positioning mode for acquiring position information based on the satellite signal. A reception mode setting section;
A leap second reception control unit for controlling the leap second reception processing to wait until the leap second information included in the satellite signal is transmitted and acquire the leap second information ;
When the reception mode is set to the positioning mode, the operation of the leap second reception control unit is prohibited. The satellite signal receiving device according to claim 1,
The reception control means includes
When the reception mode is set to the timekeeping mode and the leap second reception condition is satisfied, when the reception processing in the timekeeping mode is performed, the leap second information is activated by operating the leap second reception control unit. A satellite signal receiver characterized by performing a receiving process. In the satellite signal receiving device according to claim 1 or 2,
The reception control means includes
A leap second information reception process is executed by operating the leap second reception control unit when a leap second reception process is instructed by an operation of an external operation member. In the satellite signal receiving device according to any one of claims 1 to 3,
A reception state display means for displaying the reception state;
The reception status display means includes
While receiving the leap second information, the satellite signal receiving apparatus displays that leap second information is being received. In the satellite signal receiving device according to any one of claims 1 to 4,
A leap second standby state display means for displaying that it is waiting to receive the leap second information;
The reception control means includes
When the leap second reception control unit is operated to perform leap second information reception processing, the satellite signal reception device displays a waiting time until the leap second information reception starts in a countdown display. In the satellite signal receiving device according to any one of claims 1 to 5,
The reception control means includes
When the leap second reception control unit is activated to perform the leap second information reception process, if the reception process is instructed by an operation of the external operation member, the leap second information reception process is continued. A featured satellite signal receiver. In the satellite signal receiving device according to any one of claims 1 to 5,
The reception control means includes
When the leap second reception control unit is activated to perform leap second information reception processing, if the reception processing is instructed by an operation of an external operation member, the leap second information reception processing is interrupted. A featured satellite signal receiver. A satellite signal receiving device according to any one of claims 1 to 7,
A time measuring means for measuring time;
Time correction means for outputting the time information acquired by the satellite signal receiving device and updating the time of the time measuring means to the time measuring means,
An electronic timepiece comprising: time display means for displaying the time counted by the timekeeping means. The electronic timepiece according to claim 8, wherein
The time correction means updates the time of the time measuring means using the acquired leap second information when the leap second reception control unit is activated and the acquisition of the leap second information is successful. clock. The electronic timepiece according to claim 8 or 9,
When the leap second information can be acquired while receiving the satellite signal in the positioning mode or the time measurement mode, the time correction means determines whether the update by the acquired leap second information is necessary, and the update is necessary. If it is determined, the time of the time measuring means is updated using the acquired leap second information. The receiving mode of the receiving means for receiving the satellite signal transmitted from the position information satellite includes a time measurement mode for acquiring time information based on the satellite signal, and a positioning mode for acquiring position information based on the satellite signal. Select from multiple reception modes including
When the reception mode is set to the positioning mode, the leap second reception process for obtaining the leap second information by waiting until the leap second information included in the satellite signal is transmitted is prohibited. A satellite signal receiving method.

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