JP2017036961A - Electronic watch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic watch capable of reducing time required for reception processing in each area when the electronic watch is used in a plurality of areas.SOLUTION: An electronic watch 10 comprises: a reception unit 121 receiving a satellite signal; a satellite system setting section 330 setting a priority satellite system to be preferentially searched; a reception instruction section 310; and a reception control section 320 executing reception processing when instructions by the reception instruction section 310 exist. The satellite system setting section 330 sets a predetermined satellite system to the priority satellite system when a position information satellite of the predetermined satellite system set beforehand is captured by the reception unit 121. The reception control section 320 preferentially searches the position information satellite of the predetermined satellite system in the case where the predetermined satellite system is set to the priority satellite system when executing the reception processing.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an electronic timepiece that receives a satellite signal transmitted from a position information satellite.

A satellite radio wave receiver that receives signal radio waves from a quasi-zenith satellite in addition to a GPS (Global Positioning System) satellite has been proposed (see Patent Document 1).
The Quasi-Zenith Satellites System (QZSS) is a combination of quasi-zenith satellites arranged in multiple orbital planes (quasi-zenith orbits) so that one satellite can always be seen near the zenith in Japan. This is a satellite system to use. The orbit of the quasi-zenith satellite orbits the earth at the same period as the earth's rotation with an orbit inclination angle (orbit inclination from the equator plane).
Since this quasi-zenith satellite is always in the zenith direction in Japan, there is a high possibility that signals from the quasi-zenith satellite can be received even in places where GPS satellites are hidden by mountains or buildings and cannot be seen.

  The satellite radio wave receiver of Patent Document 1 includes a quasi-zenith satellite search means for searching for a quasi-zenith satellite, and a non-quasi-zenith satellite for searching for a non-quasi-zenith satellite after the quasi-zenith satellite search by the quasi-zenith satellite search means. A search means is provided. This satellite radio receiver always performs a search for a quasi-zenith satellite before a search for a non-quasi-zenith satellite (for example, a GPS satellite), so that the satellite's orbit information is not held and is started during a cold start. The time required for positioning is shortened.

JP 2006-317225 A

  By the way, when the satellite radio wave receiver disclosed in Patent Document 1 is built in an electronic timepiece, the usage environment may move from Japan to a foreign country, for example. In this case, in a state where the quasi-zenith satellite cannot be acquired, the search for the quasi-zenith satellite is always performed before the search for the non-quasi-zenith satellite. For this reason, for example, there is a problem that the time required for the reception process becomes longer by the time for searching for the quasi-zenith satellite compared with the case of searching for the GPS satellite first.

  An object of the present invention is to provide an electronic timepiece that can shorten the time required for reception processing in each area when the electronic timepiece is used in a plurality of areas.

  The electronic timepiece of the present invention searches for position information satellites of a plurality of satellite systems, and sets a receiving unit for receiving a satellite signal transmitted from a position information satellite captured by the search and a priority satellite system for preferential search. A satellite system setting unit, a reception instruction unit for instructing execution of reception processing, and a reception control unit for controlling the reception unit to execute reception processing when instructed by the reception instruction unit, The satellite system setting unit sets the predetermined satellite system as the priority satellite system when a position information satellite of a predetermined satellite system set in advance is captured by the reception unit, and the reception control unit includes: When executing the reception process, if the predetermined satellite system is set as the priority satellite system, the position information satellite of the predetermined satellite system is preferentially searched. And butterflies.

The receiving unit is, for example, a position information satellite used in a global navigation satellite system (GNSS) such as GPS, or a position used in a regional satellite positioning system (RNSS) such as QZSS. Search for information satellites.
The predetermined satellite system is an RNSS such as QZSS, for example. The RNSS can capture the position information satellite only in a specific area, and when the electronic clock is in the specific area, for example, it is easier to capture the position information satellite than the GPS.
When the position information satellite of the predetermined satellite system is captured by the receiving unit, the electronic timepiece can be determined to be in an area where the position information satellite of the predetermined satellite system can be captured (captured area). Sets a predetermined satellite system as the priority satellite system. When the reception instruction unit instructs execution of the reception process, the reception control unit preferentially searches for a position information satellite of a predetermined satellite system.
According to this, when the electronic timepiece is in an area where the predetermined satellite system can be captured, for example, the time required for capturing the position information satellite can be shortened as compared with the case where the GPS satellite is searched first.
In addition, when the position information satellite of the predetermined satellite system is not captured by the receiving unit, it can be determined that the electronic timepiece is not in an area where the predetermined satellite system can be captured, so the satellite system setting unit prioritizes the predetermined satellite system. Do not set to satellite system. When the reception instruction unit instructs execution of reception processing in a state where the predetermined satellite system is not set as the priority satellite system, the reception control unit first searches for a GPS satellite, for example.
According to this, when the electronic clock is not in the area where the predetermined satellite system can be captured, the time required for capturing the position information satellite is shortened compared to the case where the position information satellite of the predetermined satellite system is preferentially searched. it can.
As described above, according to the present invention, it is possible to reduce the time required for the reception process regardless of whether the electronic timepiece is in a region where the predetermined satellite system can be captured or in another region.

  In the electronic timepiece of the invention, the reception control unit executes a positioning reception process that receives a satellite signal and calculates and acquires position information, and the satellite system setting unit performs the predetermined satellite system by the positioning reception process. When the position information satellite is captured by the receiving unit, it is preferable to set the predetermined satellite system as the priority satellite system.

Since the positioning reception process needs to receive satellite signals from at least three position information satellites, more position information satellites can be obtained compared to the time reception process that only needs to receive satellite signals from one position information satellite. Often captured.
For this reason, when the electronic timepiece is in an area where the predetermined satellite system can be captured, the reception control unit executes the positioning reception process, thereby determining the probability that the position information satellite of the predetermined satellite system is captured by the reception unit. This can be higher than when the timekeeping reception process is executed.
For this reason, when the position information satellite of the predetermined satellite system is captured by the receiving unit by the positioning reception process, the satellite system setting unit sets the predetermined satellite system as the priority satellite system, thereby performing the time measurement reception process. As compared with, a predetermined satellite system can be set as a priority satellite system with higher probability.
In addition, positioning reception processing is often executed when the electronic timepiece moves to another area. Therefore, the electronic timepiece moves to another area by setting the priority satellite system based on the positioning reception processing. Then, the priority satellite system can be set at a timing when it is necessary to review the setting of the priority satellite system.

  In the electronic timepiece according to the aspect of the invention, when the reception control unit executes a time measurement reception process of receiving a satellite signal and acquiring time information, and when the predetermined satellite system is set as the priority satellite system. Preferably, the position information satellite of the predetermined satellite system is preferentially searched.

The time measurement reception process may be performed by receiving a satellite signal from one position information satellite.
For this reason, when performing time measurement reception processing, it is highly possible that a required number of position information satellites can be acquired in a short time by searching for position information satellites of a predetermined satellite system that can easily acquire position information satellites. . For this reason, when a predetermined satellite system is set as a priority satellite system, a required number of position information satellites can be acquired in a short time by preferentially searching for position information satellites of the predetermined satellite system. The reception process can be completed in a short time.

  In the electronic timepiece of the invention, the predetermined satellite system is preferably a regional satellite positioning system.

A regional satellite positioning system (RNSS) is likely to capture position information satellites when the electronic watch is in an RNSS-capable area, for example, compared to GPS.
For this reason, when the electronic timepiece is in an area where RNSS can be captured, the position information satellite of RNSS is preferentially searched, for example, in comparison with the case of searching for GPS satellites first. This time can be shortened.

  In the electronic timepiece of the invention, it is preferable that the predetermined satellite system is a quasi-zenith satellite system.

In the quasi-zenith satellite system (QZSS), since there is always a position information satellite in the zenith direction in Japan, there is a high probability that the position information satellite can be captured.
For this reason, when the electronic timepiece is in Japan, the time required for capturing the position information satellite can be shortened by preferentially searching for the position information satellite (QZSS) of QZSS.

  In the electronic timepiece according to the aspect of the invention, it is preferable that the satellite system setting unit cancels the setting of the predetermined satellite system as the priority satellite system when a preset cancellation condition is met.

According to the present invention, after the predetermined satellite system is set as the priority satellite system, if the setting cancellation condition is met, it is determined that the electronic timepiece has moved from the captureable area of the predetermined satellite system to another area. Then, the satellite system setting unit cancels the setting for setting the predetermined satellite system as the priority satellite system.
According to this, when the electronic clock moves from a region where the predetermined satellite system can be captured to another region, it is possible to prevent the position information satellite of the predetermined satellite system from being searched for preferentially and to reduce power consumption. it can.
In addition, when a user wearing an electronic watch moves from a region where a predetermined satellite system can be captured to another region, the user does not need to cancel the setting by operating the buttons on the electronic watch. Since the above setting can be canceled, ease of use can be improved.

  In the electronic timepiece according to the aspect of the invention, it is preferable that the setting cancellation condition is whether a position information satellite of the predetermined satellite system is not captured by the receiving unit for a predetermined period.

The reception process is periodically performed, for example, once every two days. For this reason, after the predetermined satellite system is set as the priority satellite system, if the position information satellite of the predetermined satellite system is not captured by the receiver for a period longer than the reception interval, the electronic timepiece is It can be determined that the satellite system has moved from another area where it can be captured to another area.
For this reason, when the predetermined period is set to a period longer than the reception interval and the position information satellite of the predetermined satellite system is not captured by the receiving unit for a predetermined period, the predetermined satellite system is set as the priority satellite system. By canceling the setting, it is possible to prevent the position information satellite of the predetermined satellite system from being searched preferentially when the electronic clock moves from a region where the predetermined satellite system can be captured to another region. Can be reduced.

  In the electronic timepiece according to the aspect of the invention, it is preferable that the setting cancellation condition is whether a position information satellite of the predetermined satellite system is not captured by the receiving unit as a result of reception processing, and continues for a predetermined number of times.

For example, in QZSS, there is a high probability that a quasi-zenith satellite can be captured. For this reason, after QZSS is set as the priority satellite system, if the number of times that the quasi-zenith satellite cannot be captured continues, for example, twice as a result of reception processing, the electronic clock moves from the area where QZSS can be captured to another area. It can be judged that
For this reason, if the predetermined number of times is set to, for example, twice, and if the quasi-zenith satellite cannot be captured as a result of the reception process, but continues for the predetermined number of times, the setting of QZSS as the priority satellite system is canceled, When the watch moves from an area where QZSS can be captured to another area, it is possible to prevent the quasi-zenith satellite from being searched preferentially, and to reduce power consumption.

  In the electronic timepiece of the invention, the electronic timepiece includes a signal strength measuring unit that measures a signal strength of a satellite signal transmitted from the position information satellite captured by the receiving unit, and there are a plurality of the predetermined satellite systems, and the satellite system setting unit When the position information satellite of the predetermined satellite system is captured by the receiving unit, the predetermined satellite system from which the position information satellite is captured is set as the priority satellite system, and is set as the priority satellite system. When there are a plurality of the predetermined satellite systems, the reception control unit detects the maximum value of the signal strength in each predetermined satellite system and executes the reception process, and the predetermined value with the higher maximum value is detected. It is preferable to search the position information satellite of the satellite system with higher priority.

The predetermined satellite systems are, for example, QZSS, Indian Regional Navigation Satellite System (IRNSS) in India, DORIS (Doppler Orbitography and Radio-positioning Integrated by Satellite) in France, and Beidou in China.
For example, because a quasi-zenith satellite and a Beidou location information satellite may be captured in the same region, according to the present invention, both satellite systems may be set as preferred satellite systems.
In this case, two satellites are detected by detecting the maximum value of the signal intensity in each satellite system set in the priority satellite system and more preferentially searching for the position information satellite of the satellite system having the higher maximum value. Among the systems, it is possible to preferentially search for a satellite system that can easily acquire a position information satellite. Thereby, compared with the case where the priority of search is fixed between QZSS and Beidou, the average time required for capturing the position information satellite can be shortened.

  In the electronic timepiece according to the aspect of the invention, it is preferable that the satellite system setting unit cancels the setting for setting the predetermined satellite system as the priority satellite system for each satellite system when a preset cancellation condition is satisfied. .

  According to the present invention, for example, the electronic timepiece is in an area where the quasi-zenith satellite and the Beidou position information satellite can be captured, and the quasi-zenith satellite can be received in a state where QZSS and Beidou are set as the priority satellite system. In addition, when moving to an area where the position information satellite of Beidou cannot be captured, only the setting for setting Beidou as the priority satellite system can be canceled, and the setting for setting QZSS as the priority satellite system can be maintained. For example, when both settings are canceled at once, the quasi-zenith satellite cannot be preferentially searched until the QZSS is reset to the priority satellite system in the destination area. In the previous area, the quasi-zenith satellite can be preferentially searched from the first reception process, and the time required for the reception process can be shortened.

It is the schematic which shows the electronic timepiece which concerns on embodiment of this invention. It is a top view of the electronic timepiece in an embodiment. It is sectional drawing of the electronic timepiece in embodiment. It is a control block diagram in an embodiment. It is a data structure figure of the memory | storage device in embodiment. It is a flowchart which shows the reception process in embodiment.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 is a schematic view showing an electronic timepiece 10 of the present embodiment.
The electronic timepiece 10 receives a satellite signal transmitted from at least one position information satellite among position information satellites orbiting the earth in a predetermined orbit to obtain time information, and preferably at least three, preferably Is configured to receive satellite signals transmitted from four position information satellites and calculate and acquire position information.

Here, as the location information satellite, there are a GNSS satellite that is a location information satellite of the global satellite positioning system (GNSS) and an RNSS satellite that is a location information satellite of the regional satellite positioning system (RNSS).
Examples of the global satellite positioning system include GPS (United States), GLONASS (Russia), Galileo (European Community), and Beidou (China). Examples of regional satellite positioning systems include the Quasi-Zenith Satellite System (QZSS; Japan), IRNSS (India), DORIS (France), and Beidou (China).
In this embodiment, GPS will be described as an example of GNSS and QZSS will be described as an example of RNSS. Therefore, in the following embodiment, the GPS satellite 100 shown in FIG. 1 is an example of a GNSS satellite, and the quasi-zenith satellite 101 is an example of an RNSS satellite.

[Schematic configuration of electronic watch]
FIG. 2 is a plan view of the electronic timepiece 10, and FIG. 3 is a cross-sectional view schematically illustrating the electronic timepiece 10.
As shown in FIGS. 2 and 3, the electronic timepiece 10 includes an exterior case 30, a cover glass 33, and a back cover 34. The exterior case 30 is configured by fitting a bezel 32 made of ceramic to a cylindrical case 31 made of metal. On the inner peripheral side of the bezel 32, a disk-shaped dial plate 11 is disposed as a time display portion via a ring-shaped dial ring 40 made of plastic.
On the side surface of the exterior case 30, an A button 51 is provided at the 2 o'clock position, a B button 52 is provided at the 4 o'clock position, and a crown 55 is provided at the 3 o'clock position from the center of the dial 11. Yes.

As shown in FIG. 3, the electronic timepiece 10 has an opening on the front surface side that is covered with a cover glass 33 through a bezel 32, and has an opening on the back surface side. Is closed by a back cover 34 made of metal.
Inside the outer case 30, the dial ring 40 attached to the inner periphery of the bezel 32, the light-transmitting dial plate 11, the pointer shaft 25 penetrating the dial plate 11, and the needle shaft 25 circulates around the needle shaft 25. Needles 21, 22, and 23, and a drive mechanism 140 are provided. The drive mechanism 140 drives the hands 21, 22, 23, 61, 71, 81, 82, 91 and the calendar wheel 16 shown in FIG.
The pointer shaft 25 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.

  The dial ring 40 has an outer peripheral end in contact with the inner peripheral surface of the bezel 32, a flat plate portion whose one surface is parallel to the cover glass 33, and an inner peripheral end in contact with the dial plate 11. 11 is provided with an inclined portion inclined toward the 11 side. The dial ring 40 has a ring shape in plan view and a mortar shape in 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 40, and the ring-shaped antenna body 110 is stored in the storage space.

The dial 11 is a circular plate that displays the time inside the outer case 30, is formed of a light-transmitting material such as plastic, and includes hands 21, 22, and 23 between the cover glass 33, It is arranged inside the dial ring 40.
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 dial plate 11, the solar panel 135, and the base plate 125 are formed with holes through which the pointer shaft 25 and the pointer shafts (not shown) of the pointers 61, 71, 81, 82, 91 pass. In addition, the dial 11 and the solar panel 135 are formed with openings for the calendar small windows 15.

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 and a wheel train such as a gear, and the step motor drives each pointer by rotating the pointer shaft 25 and the like through the wheel train.
Specifically, the drive mechanism 140 includes first to sixth drive mechanisms. The first drive mechanism drives a pointer 22 (minute hand) and a pointer 23 (hour hand) indicating “minute” and “hour” at the first time (local time). Further, the hands 21, 61, 71, 81, 82, 91 shown in FIG. 2 are also driven by a similar drive mechanism (not shown). That is, the second driving mechanism drives the pointer 21 indicating “second” of the first time, the third driving mechanism drives the pointer 61 indicating the day of the week, and the fourth driving mechanism drives the pointer 71 indicating the mode and the like. The fifth drive mechanism drives the hands 81 (minutes) indicating “minute” and “hour” at the second time (home time), the hands 82 (hours), and the hands 91 indicating morning and afternoon at the second time. The sixth drive mechanism drives the calendar wheel 16 viewed from the calendar small window 15.

  The circuit board 120 includes a receiving device (GPS module) 121, a control device 300, and a storage device 200. Further, the circuit board 120 and the antenna body 110 are connected by using antenna connection pins 115. A circuit retainer 122 for covering these circuit components is provided on the back cover 34 side (back side) of the circuit board 120 provided with the receiving device 121, the control device 300, and the storage device 200. A secondary battery 130 such as a lithium ion battery is provided between the ground plate 125 and the back cover 34. The secondary battery 130 is charged with the power generated by the solar panel 135.

[Electronic watch display mechanism]
On the inner peripheral side of the dial ring 40 that surrounds the outer peripheral portion of the dial 11, a scale that divides the inner periphery into 60 divisions is shown as shown in FIG. 2. Using this scale, the hand 21 displays “second” of the first time at normal time, the hand 22 displays “minute” of the first time, and the hand 23 displays “hour” of the first time. Since the “second” of the first time is the same as the “second” of the second time described later, the user can grasp the “second” of the second time by checking the pointer 21.
The dial ring 40 has an alphabet “Y” at the 12-minute position and an alphabet “N” at the 18-minute position. This alphabetic character indicates a reception (acquisition) result (Y: reception (acquisition) success, N: reception (acquisition) failure) of various information based on the satellite signal received from the position information satellite. The pointer 21 indicates either “Y” or “N” and displays the reception result of the satellite signal. The reception result is displayed by pressing the A button 51 for less than 3 seconds.

  The pointer 61 is provided at a position in the 2 o'clock direction from the center of the dial 11. On the outer periphery of the rotation area of the pointer 61, the letters “S”, “M”, “T”, “W”, “T”, “F”, and “S” indicating the seventh day are written. The pointer 61 displays the day of the week by instructing one of “S” to “S”.

The pointer 71 is provided at a position in the 10 o'clock direction from the center of the dial 11. Hereinafter, the notation of the outer periphery of the rotation area of the pointer 71 will be described. The “n hour direction” (n is an arbitrary natural number) is the direction when the outer periphery of the rotation area is viewed from the pointer axis of the pointer 71. .
On the outer periphery of the range of rotation of the pointer 71 from the 6 o'clock direction to the 7 o'clock direction, an English letter “DST” and a symbol “O” are written. DST (daylight saving time) means daylight saving time. The pointer 71 indicates the setting of daylight saving time (DST: daylight saving time ON, ○: daylight saving time OFF) by indicating these letters and symbols.

  On the outer circumference of the range of rotation of the pointer 71 from the 8 o'clock direction to the 9 o'clock direction, a crescent sickle-shaped symbol 72 is formed along the circumference, with the base end in the 9 o'clock direction being thick and the tip in the 8 o'clock direction being thin. It is written. This symbol 72 is a power indicator of the secondary battery 130 (see FIG. 3), and the remaining battery level is displayed when the pointer 71 indicates a position corresponding to the remaining battery level. The pointer 71 indicates the symbol 72 at the normal time.

  An airplane-shaped symbol 73 is written on the outer periphery of the rotation area of the pointer 71 in the 10 o'clock direction. This symbol represents the airplane mode. When aircraft take off and landing, the reception of satellite signals is prohibited by the Aviation Law. The pointer 71 indicates that the in-flight mode is set and no reception is performed by designating the symbol 73.

  The number “1” and the symbol “4+” are written on the outer periphery of the rotation region of the pointer 71 from the 11 o'clock direction to the 12 o'clock direction. These numbers and symbols represent satellite signal reception modes. “1” receives time information and the internal time is corrected (timekeeping mode), “4+” receives time information and orbit information, calculates position information that is the current position, This means that time zone data to be described later is corrected (positioning mode).

The hands 81 and 82 are provided at a position in the 6 o'clock direction from the center of the dial 11. The hand 81 displays “minute” of the second time, and the hand 82 displays “hour” of the second time.
The pointer 91 is provided at a position in the 4 o'clock direction from the center of the dial 11 and displays the morning and afternoon of the second time.
The calendar small window 15 is provided in the opening part which opened the dial 11 in the rectangular shape, and the number printed on the calendar wheel 16 can be visually recognized from the opening part. This number represents the “day” of the date.

In the dial ring 40, time difference information 45 indicating a time difference from Coordinated Universal Time (UTC) is indicated by a numeral and a symbol other than a numeral along a scale on the inner peripheral side. The numerical time difference information 45 represents an integer time difference, and the symbol time difference information 45 represents a time difference other than an integer. The time difference between the first time displayed on the hands 21, 22 and 23 and UTC can be confirmed by the time difference information 45 indicated by the hand 21 by pressing the B button 52.
The bezel 32 provided around the dial ring 40 has city information 35 representing the representative city name of the time zone using the standard time corresponding to the time difference of the time difference information 45 written on the dial ring 40. Is also written in the time difference information 45. Here, the notation of the time difference information 45 and the city information 35 is referred to as a time zone display 46. In this embodiment, a time zone display 46 equal to the number of time zones used all over the world is shown.

[Internal structure of electronic watch]
FIG. 4 is a control block diagram of the electronic timepiece 10.
As shown in FIG. 4, the electronic timepiece 10 includes a control device 300 composed of a CPU (Central Processing Unit), a storage device 200 composed of a RAM (Random Access Memory) and a ROM (Read Only Memory), and a reception device 121. The timer device 150, the input device 160, the drive mechanism 140, and the display device 141 are provided. Each of these devices transmits and receives data via a data bus.
The electronic timepiece 10 also includes a rechargeable secondary battery 130 (see FIG. 3) that serves as a power source. The secondary battery 130 is charged with electric power supplied from the solar panel 135 via the charging circuit 131.

[Input device]
The input device 160 includes a crown 55, an A button 51, and a B button 52 shown in FIG.
[Display device]
The display device 141 includes the dial plate 11, dial ring 40, bezel 32, hands 21, 22, 23, 61, 71, 81, 82, 91 shown in FIG. 2.

[Receiver]
The receiving device 121 is connected to the antenna body 110 and processes satellite signals received via the antenna body 110 to acquire time information and position information. The antenna body 110 receives a radio wave of a satellite signal transmitted from the GPS satellite 100 and the quasi-zenith satellite 101 (see FIG. 1) and passed through the cover glass 33 and the dial ring 40 shown in FIG. Here, the receiving device 121 is an example of a receiving unit of the present invention.

  Although not shown, the receiving device 121 is an RF (Radio Frequency) unit that receives satellite signals transmitted from the GPS satellite 100 and the quasi-zenith satellite 101 and converts them into digital signals, as in a normal GPS device. BB part (baseband part) that performs correlation determination of received signals and demodulates navigation message, and acquires time information and position information (positioning information) from navigation message (satellite signal) demodulated by BB part Output information acquisition means.

[Time measuring device]
The time measuring device 150 includes a crystal resonator driven by the electric 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. 5, the storage device 200 includes a time data storage unit 210 and a time zone data storage unit 220.
The time data storage unit 210 includes reception time data 211, leap second update data 212, internal time data 213, first display time data 214, second display time data 215, and first time zone data. 216 and second time zone data 217 are stored.
The reception time data 211 stores time information acquired from satellite signals. The reception time data 211 is normally updated every second by the time measuring device 150, and when the satellite signal is received, the acquired time information is stored.
The leap second update data 212 stores at least current leap second data. That is, in 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 leap seconds. Each data is included. Among these, in this embodiment, at least “current leap second” data is stored in the leap second update data 212.

  Internal time information is stored in the internal time data 213. This internal time information is updated by the time stored in the reception time data 211 and the “current leap second” stored in the leap second update data 212. That is, the internal time data 213 stores UTC (Coordinated Universal Time). When the reception time data 211 is updated by the timing device 150, the internal time information is also updated.

The first display time data 214 stores time information obtained by adding the time zone data (time difference information) of the first time zone data 216 to the internal time information of the internal time data 213. The first time zone data 216 is set as time zone data obtained when the user manually selects or receives in the positioning mode. Here, the time information of the first display time data 214 corresponds to the first time displayed by the hands 21, 22, and 23.
The second display time data 215 stores time information obtained by adding the time zone data of the second time zone data 217 to the internal time information of the internal time data 213. The second time zone data 217 is set as time zone data obtained when the user manually selects. Here, the time information of the second display time data 215 corresponds to the second time displayed by the hands 81, 82, 91.

The time zone data storage unit 220 stores position information (latitude, longitude) and time zone data (time difference information) in association with each other. Therefore, when the position information is acquired in the positioning mode, the control device 300 can acquire time zone data based on the position information (latitude, longitude).
The time zone data storage unit 220 further stores a city name and time zone data in association with each other. Therefore, when the user selects a city name for which the local time is desired by operating the crown 55, the control device 300 searches the time zone data storage unit 220 for the city name set by the user and corresponds to the city name. Time zone data to be acquired is acquired and set in the first time zone data 216 or the second time zone data 217.

[Control device]
The control device 300 includes a CPU that controls the electronic timepiece 10. The control device 300 includes a reception instruction unit 310, a reception control unit 320, a satellite system setting unit 330, a signal intensity measurement unit 340, a time correction unit 350, and a display control unit 360.
The reception instruction unit 310 instructs the reception control unit 320 to execute the reception process when the reception condition of the satellite signal is satisfied or when the A button 51 is pressed for 3 seconds or more.
When there is an instruction from the reception instruction unit 310, the reception control unit 320 controls the reception device 121 to execute reception processing.

The satellite system setting unit 330 sets and cancels the priority satellite system to be preferentially searched.
Specifically, when the quasi-zenith satellite is captured by the receiving device 121, the satellite system setting unit 330 sets QZSS as the priority satellite system.
Here, in the present embodiment, QZSS corresponds to an example of a predetermined satellite system of the present invention.
In addition, after setting the priority satellite system, the satellite system setting unit 330 cancels the setting for setting QZSS as the priority satellite system when a preset cancellation condition is met.
In this embodiment, the setting cancellation condition is whether the state in which the quasi-zenith satellite is not captured by the receiving device 121 has continued for a predetermined period. The predetermined period is, for example, one week.
Information on setting and canceling the priority satellite system is stored in the storage device 200.

The signal strength measuring unit 340 measures the signal strength of the satellite signal transmitted from the position information satellite captured by the receiving device 121.
The time correction unit 350 corrects the first display time data 214 and the second display time data 215 based on the time information and the position information acquired by receiving the satellite signal.
The display control unit 360 controls the display of the display device 141 by controlling the operation of the drive mechanism 140.
The details of the function of the control device 300 will be described in the following reception process.

[Receive processing]
A reception process executed by the control device 300 will be described.
For example, the reception instruction unit 310 instructs the reception control unit 320 to execute the reception process when the A button 51 is pressed for 3 seconds or more and a reception operation is performed or when a predetermined reception condition is satisfied. To do.
In this embodiment, when the A button 51 is pressed for 3 seconds or more and less than 6 seconds, the reception instruction unit 310 instructs the reception control unit 320 to execute the time measurement reception process, and the A button 51 is pressed for 6 seconds or more. If so, the reception control unit 320 is instructed to execute the positioning reception process.
In addition, the reception instruction unit 310 instructs the reception control unit 320 to execute the time measurement reception process when the reception condition is satisfied.
Here, the reception condition is, for example, a case where a reception timing set at a predetermined time interval (for example, two days) is reached. The reception condition is that the amount of power generated by the solar panel 135 is equal to or greater than a predetermined value, and it can be determined that the electronic timepiece 10 is irradiated with sunlight, and the electronic timepiece 10 can be determined to be outdoors where satellite signals are easily received. Etc.

  When there is an instruction from the reception instruction unit 310, the reception control unit 320 starts the reception process illustrated in FIG. That is, the reception control unit 320 executes the time reception process when the time measurement reception process is instructed, and executes the position reception process when the position reception process is instructed.

When the reception process is started, the reception control unit 320 determines whether QZSS is set as the priority satellite system (S11). Note that the setting for setting QZSS as the priority satellite system is performed when the quasi-zenith satellite is captured by the receiving device 121 by the reception process and the electronic timepiece 10 can be determined to be in the QZSS capturing area, as will be described later.
When it is determined YES in S11, the reception control unit 320 searches (searches) for a QZSS position information satellite (quasi-zenith satellite) set in the priority satellite system (S12).

Next, the reception control unit 320 determines whether the quasi-zenith satellite has been captured by the receiving device 121 (S13).
If YES is determined in S13, it can be determined that the electronic timepiece 10 is in an area where QZSS can be captured, so the satellite system setting unit 330 sets QZSS set in the priority satellite system to the priority satellite system again. (S14).
Then, the satellite system setting unit 330 starts after resetting the counter to 0 (S15). Thereby, measurement of the elapsed time since the quasi-zenith satellite was last captured by the receiving device 121 is started. The counter continues measuring even after the reception process is completed.

Here, the reception process is periodically performed at a frequency of once every two days, for example. For this reason, after the QZSS is set as the priority satellite system, when the quasi-zenith satellite is not captured by the receiving device 121 for a period longer than the reception interval, the electronic timepiece 10 is It can be judged that it moved to another area.
For this reason, in this embodiment, when the predetermined period is set to a period longer than the reception interval (for example, one week) and the counter value reaches the predetermined period (for example, one week), that is, the quasi-zenith satellite receives the signal. When the state not captured by the device 121 continues for a predetermined period, it is determined that the setting cancellation condition is satisfied, and the satellite system setting unit 330 cancels the setting for setting QZSS as the priority satellite system.

Next, the reception control unit 320 determines whether the satellite signal has been successfully received (S16).
When it is determined YES in S <b> 16, the time correction unit 350 stores the acquired time information in the reception time data 211. Thereby, the internal time data 213, the first display time data 214, and the second display time data 215 are corrected (S17).
When the reception process is a positioning reception process, the time correction unit 350 acquires time zone data corresponding to the acquired position information from the time zone data storage unit 220, and uses the acquired time zone data as the first time The zone data 216 is set. Thereby, the first display time data 214 is corrected.
Then, the display control unit 360 controls the drive mechanism 140 to display the first time of the first display time data 214 and the second time of the second display time data 215 on the display device 141 and display the display device 141. The time is corrected (S18). Then, the reception control unit 320 ends the reception process.

On the other hand, when it is determined NO in S11, the reception control unit 320 searches for the GPS satellites first according to the preset order, and then searches for the quasi-zenith satellites (S19).
If NO is determined in S13, and if NO is determined in S16, reception control unit 320 searches for a GPS satellite in S19.

Next, the reception control unit 320 determines whether the quasi-zenith satellite is captured by the receiving device 121 (S20).
If NO is determined in S11, the quasi-zenith satellite is also searched in S19, so that YES may be determined in S20. If YES is determined in S20, it can be determined that the electronic timepiece 10 is in an area where QZSS can be captured, and thus the process proceeds to S14. The satellite system setting unit 330 sets QZSS as the priority satellite system, and in S15. Start after resetting the counter to zero. In step S16, the reception control unit 320 determines whether the satellite signal has been successfully received.
On the other hand, if NO is determined in S13, or if NO is determined in S16, since QZSS is not searched in S19, NO is always determined in S20.

When it is determined NO in S20, the reception control unit 320 determines whether the satellite signal has been successfully received (S21).
When it is determined YES in S <b> 21, the time correction unit 350 stores the acquired time information in the reception time data 211. As a result, the internal time data 213, the first display time data 214, and the second display time data 215 are corrected (S22).
When the reception process is a positioning reception process, the time correction unit 350 acquires time zone data corresponding to the acquired position information from the time zone data storage unit 220, and uses the acquired time zone data as the first time The zone data 216 is set. Thereby, the first display time data 214 is corrected.
Then, the display control unit 360 controls the drive mechanism 140 to display the first time of the first display time data 214 and the second time of the second display time data 215 on the display device 141 and display the display device 141. The time is corrected (S23). Then, the reception control unit 320 ends the reception process.

On the other hand, when it is determined NO in S21, the reception control unit 320 determines whether the elapsed time from the start of the reception process is a timeout time (S24).
When it is determined YES in S24, the reception control unit 320 determines that it is unlikely that the satellite signal can be successfully received even if the reception process is continued, and ends the reception process.
On the other hand, when it is determined NO in S24, the reception control unit 320 returns the process to S19. As a result, the processes of S19 to S24 are repeatedly executed until the satellite signal is successfully received or until a timeout occurs.

[Effects of First Embodiment]
When the quasi-zenith satellite is captured by the receiving device 121 (YES in S13, YES in S20), the electronic timepiece 10 is determined to be in a QZSS capture area where it is easier to capture a location information satellite than GNSS. Therefore, the satellite system setting unit 330 sets QZSS as the priority satellite system (S14). When the reception instruction unit 310 instructs execution of the reception process, the reception control unit 320 preferentially searches for the quasi-zenith satellite (S12).
According to this, when the electronic timepiece 10 is in the area where QZSS can be captured, for example, the time required for capturing the position information satellite can be shortened as compared with the case where the GPS satellite is searched first.
Further, when the quasi-zenith satellite is not captured by the receiving device 121, it can be determined that the electronic timepiece 10 is not in the QZSS capture area, so the satellite system setting unit 330 does not set QZSS as the priority satellite system. Further, after setting QZSS as the priority satellite system, if the setting cancellation condition is met, the electronic timepiece 10 determines that the QZSS has moved from another area where QZSS can be captured, and the satellite system setting unit 330 Cancels the setting of QZSS as the priority satellite system. If QZSS is not set in the priority satellite system and the reception instruction unit 310 instructs execution of reception processing, NO is determined in S11, and in S19, the reception control unit 320 points the GPS satellite first. Search for.
According to this, when the electronic timepiece 10 is not in the area where QZSS can be captured, the time required for capturing the position information satellite can be shortened compared to the case where the quasi-zenith satellite is preferentially searched.
As described above, according to the present embodiment, it is possible to reduce the time required for the reception process even when the electronic timepiece 10 is in a region where QZSS can be captured or in another region.

Since the positioning reception process needs to receive satellite signals from at least three position information satellites, more position information satellites can be obtained compared to the time reception process that only needs to receive satellite signals from one position information satellite. Often captured.
For this reason, when the electronic timepiece 10 is in an area where QZSS can be captured, the reception control unit 320 executes the positioning reception process, so that the probability that the quasi-zenith satellite is captured by the receiving device 121 is determined. It can be higher than when it is executed.
For this reason, when the quasi-zenith satellite is captured by the receiver 121 by the positioning reception process, the satellite system setting unit 330 sets QZSS as the priority satellite system, which is higher than that by the time measurement reception process. QZSS can be set as a priority satellite system with probability.
In addition, since the positioning reception process is often executed when the electronic timepiece 10 moves to another area, setting the priority satellite system based on the positioning reception process allows the electronic timepiece 10 to be set in another area. The priority satellite system can be set at a timing when it is necessary to review the setting of the priority satellite system.

The time measurement reception process may be performed by receiving a satellite signal from one position information satellite.
For this reason, when the time measurement reception process is executed, if a QZSS position information satellite that easily captures position information satellites is searched, it is highly possible that a necessary number of position information satellites can be acquired in a short time. For this reason, when QZSS is set as the priority satellite system, the necessary number of position information satellites can be acquired in a short time by preferentially searching for the quasi-zenith satellite, so the reception process is completed in a short time. it can.

When the state in which the quasi-zenith satellite is not captured by the receiver 121 continues for a predetermined period, the electronic timepiece 10 has moved from the area where QZSS can be captured to another area by canceling the setting of QZSS as the priority satellite system. In this case, it is possible to prevent the quasi-zenith satellite from being searched preferentially, and to reduce power consumption.
In addition, when a user wearing the electronic timepiece 10 moves from a region where QZSS can be captured to another region, the user can automatically operate the electronic timepiece 10 without operating the button to cancel the setting. Since the setting can be canceled, usability can be improved.

[Second Embodiment]
The electronic timepiece 10 of the first embodiment receives a quasi-zenith satellite as an RNSS position information satellite, and when the quasi-zenith satellite is captured by the receiving device 121, QZSS is set as a priority satellite system. On the other hand, the electronic timepiece of the second embodiment receives QZSS, IRNSS, DORIS, and Beidou position information satellites as RNSS position information satellites, and the position information satellites of these satellite systems are captured by the receiver 121. If so, the satellite system in which the position information satellite is acquired is set as the priority satellite system.
Here, in this embodiment, QZSS, IRNSS, DORIS, and Beidou correspond to an example of a predetermined satellite system of the present invention.

Specifically, in the second embodiment, when the priority satellite system is not set and it is determined NO in S11, in S19, the reception control unit 320 determines that the GPS satellite, QZSS, IRNSS, DORIS, and Beidou. Are searched for in a preset order. Here, the GPS satellite is searched before the RNSS.
If the priority satellite system is set and NO is determined in S13, or if NO is determined in S16, the reception control unit 320 determines that the GPS satellite and the priority are in S19. The RNSS position information satellite excluding the satellite system set in the satellite system is searched in a preset order. Here, the GPS satellite is searched before the RNSS.

In S <b> 20, the satellite system setting unit 330 determines whether the position information satellite of each RNSS is captured by the receiving device 121. If YES is determined in S20, in S14, the satellite system setting unit 330 sets a satellite system in which the position information satellite is captured among QZSS, IRNSS, DORIS, and Beidou as a priority satellite system. That is, when there are a plurality of satellite systems in which the position information satellites are captured, the plurality of satellite systems are set as the priority satellite system.
In S13, the satellite system setting unit 330 determines whether or not the RNSS position information satellite set in the priority satellite system is captured by the receiving device 121. If YES is determined in S13, in S14, the satellite system setting unit 330 sets the satellite system in which the position information satellite is captured as the priority satellite system.

  In addition, a counter that measures the elapsed time since the position information satellite is captured by the receiving device 121 is provided for each of QZSS, IRNSS, DORIS, and Beidou, and the satellite system setting unit 330 sets the counter value to a predetermined period. In such a case, only the setting for setting the corresponding satellite system as the priority satellite system is canceled. That is, the setting of the priority satellite system is canceled for each satellite system.

In this embodiment, if it is determined in S11 that there are a plurality of priority satellite systems, the reception control unit 320 determines in S12 the priority satellite system based on the signal strength measurement value measured by the signal strength measurement unit 340 in S12. The maximum value of the signal strength measurement value in each set RNSS is detected. Then, the reception control unit 320 searches the RNSS position information satellite with the higher maximum value more preferentially.
Other configurations are the same as those of the electronic timepiece 10 of the first embodiment.

[Effects of Second Embodiment]
For example, because the quasi-zenith satellite and the Beidou location information satellite may be captured in the same region, both satellite systems may be set as the preferred satellite system.
In this case, in this embodiment, the maximum value of the signal intensity in each satellite system set as the priority satellite system is detected, and the position information satellite of the satellite system with the higher maximum value is searched for with higher priority. Of the two satellite systems, the satellite system that can easily acquire the position information satellite can be preferentially searched. Thereby, compared with the case where the priority of search is fixed between QZSS and Beidou, the average time required for capturing the position information satellite can be shortened.

  In the present embodiment, the setting for setting the RNSS as the priority satellite system is canceled for each satellite system. For this reason, for example, the electronic watch is in an area where the quasi-zenith satellite and the Beidou position information satellite can be captured, and the quasi-zenith satellite can be received in a state where QZSS and Beidou are set as the priority satellite system, and When moving to an area where the position information satellite of Beidou cannot be captured, according to the present embodiment, only the setting for setting Beidou as the priority satellite system can be canceled, and the setting for setting QZSS as the priority satellite system can be maintained. For example, when both settings are canceled at once, the quasi-zenith satellite cannot be preferentially searched until QZSS is reset to the priority satellite system in the destination area. In the destination area, the quasi-zenith satellite can be preferentially searched from the initial reception process, and the time required for the reception process can be shortened.

[Other Embodiments]
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 embodiments described above, the setting cancellation condition of the priority satellite system is whether or not the RNSS position information satellite is not captured by the receiving device 121 for a predetermined period, but the present invention is not limited to this. For example, the setting cancellation condition may be whether the position information satellite of the RNSS is not captured by the reception device 121 as a result of the reception process, and continues for a predetermined number of times. The predetermined number of times is, for example, twice.
For example, in QZSS, there is a high probability that a quasi-zenith satellite can be captured. For this reason, after QZSS is set as the priority satellite system, if the number of times that the quasi-zenith satellite cannot be captured continues, for example, twice as a result of reception processing, the electronic clock moves from the area where QZSS can be captured to another area. It can be judged that
For this reason, if the predetermined number of times is set to, for example, twice, and if the quasi-zenith satellite cannot be captured as a result of the reception process, but continues for the predetermined number of times, the setting of QZSS as the priority satellite system is canceled, When the watch moves from an area where QZSS can be captured to another area, it is possible to prevent the quasi-zenith satellite from being searched preferentially, and to reduce power consumption.
Moreover, since the cancellation of the setting is automatically performed, the ease of use can be improved.
Note that both the period and the number of times may be set as the setting cancellation condition.

  Further, the cancellation of the setting for setting the RNSS as the priority satellite system may be performed according to the set time zone when the time zone is set. That is, when the set time zone is not an RNSS captureable area set in the priority satellite system, the setting may be canceled.

  In each of the above embodiments, the target satellite system set as the priority satellite system is the RNSS, but the present invention is not limited to this. For example, it may be a satellite-based augmentation system (SBAS) or a GNSS such as GLONASS or Galileo.

  In the second embodiment, when there are a plurality of satellite systems set as the priority satellite system, the maximum value of the signal strength in each satellite system is detected, and the position information of the satellite system having the higher maximum value is more preferential. However, the present invention is not limited to this. For example, the search may be performed in a preset order.

  In the second embodiment, the setting for setting the RNSS as the priority satellite system is canceled for each satellite system, but the present invention is not limited to this. For example, you may cancel | release collectively. That is, when a plurality of RNSSs are set as the priority satellite system and one RNSS meets the setting cancellation condition, all the settings for setting the RNSS as the priority satellite system may be canceled.

  In the second embodiment, the satellite system setting unit 330 cancels the setting of the corresponding RNSS as the priority satellite system when the setting cancellation condition is met, but the present invention is not limited to this. For example, when a position information satellite of another RNSS is captured by the receiving device 121 in a state where a specific RNSS is set as the priority satellite system, another RNSS is overwritten and set as the priority satellite system. In this case, the satellite system setting unit 330 may not execute the process of canceling the setting for setting the RNSS as the priority satellite system.

In each of the embodiments described above, the electronic timepiece includes the display device 141 including the dial plate 11 and hands, but the present invention is not limited to this. The electronic timepiece may include a time display unit including a liquid crystal panel. In this case, the driving body that drives the time display unit includes a driving unit that drives the liquid crystal panel.
In this case, the electronic timepiece only needs to have a time display function, and the time display unit does not have to be a display unit dedicated to time display. Examples of such an electronic timepiece include a pulse meter that is mounted on the user's arm and measures a pulse, and a GPS logger that is mounted on the user's arm and measures and accumulates the current position when the user is running. A list type device can be exemplified.

  DESCRIPTION OF SYMBOLS 10 ... Electronic clock, 100 ... GPS satellite (positional information satellite), 101 ... Quasi-zenith satellite (positional information satellite), 121 ... Receiving device (receiving unit), 310 ... Reception instruction unit, 320 ... Reception control unit, 330 ... Satellite System setting unit, 340... Signal strength measurement unit, 350... Time correction unit, 360.

Claims (10)

A receiver that searches for position information satellites of a plurality of satellite systems and receives satellite signals transmitted from the position information satellites captured by the search;
A satellite system setting unit for setting a priority satellite system to be preferentially searched;
A reception instruction unit for instructing execution of reception processing;
A reception control unit that controls the reception unit to execute a reception process when an instruction is given by the reception instruction unit;
The satellite system setting unit
When a position information satellite of a predetermined satellite system set in advance is captured by the receiver, the predetermined satellite system is set as the priority satellite system,
The reception control unit preferentially searches for a position information satellite of the predetermined satellite system when the predetermined satellite system is set as the priority satellite system when executing the reception process. Electronic watch. The electronic timepiece according to claim 1,
The reception control unit executes a positioning reception process for receiving satellite signals and calculating and acquiring position information;
The satellite system setting unit sets the predetermined satellite system as the priority satellite system when a position information satellite of the predetermined satellite system is captured by the reception unit by positioning reception processing. . The electronic timepiece according to claim 1 or 2,
The reception control unit executes a time measurement reception process of receiving a satellite signal and acquiring time information, and when the predetermined satellite system is set to the priority satellite system, An electronic timepiece characterized by preferentially searching for location information satellites. The electronic timepiece according to any one of claims 1 to 3,
The electronic timepiece characterized in that the predetermined satellite system is a regional satellite positioning system. The electronic timepiece according to claim 4,
The predetermined time satellite system is a quasi-zenith satellite system. The electronic timepiece according to any one of claims 1 to 5,
The electronic timepiece, wherein the satellite system setting unit cancels the setting to set the predetermined satellite system as the priority satellite system when a preset cancellation condition is met. The electronic timepiece according to claim 6,
The electronic timepiece is characterized in that the setting cancellation condition is whether a position information satellite of the predetermined satellite system is not captured by the receiving unit for a predetermined period. The electronic timepiece according to claim 6 or 7,
The electronic timepiece is characterized in that the setting cancellation condition is whether a position information satellite of the predetermined satellite system is not captured by the reception unit as a result of reception processing, a predetermined number of times. The electronic timepiece according to any one of claims 1 to 8,
A signal strength measuring unit for measuring the signal strength of a satellite signal transmitted from the position information satellite captured by the receiving unit;
There are a plurality of the predetermined satellite systems,
The satellite system setting unit, when the position information satellite of the predetermined satellite system is captured by the reception unit, sets the predetermined satellite system from which the position information satellite is captured to the priority satellite system;
When there are a plurality of the predetermined satellite systems set in the priority satellite system, the reception control unit detects the maximum value of the signal intensity in each predetermined satellite system and executes the reception process, and the maximum value An electronic timepiece characterized by preferentially searching for a position information satellite of the predetermined satellite system having a higher value. The electronic timepiece according to claim 9,
The electronic timepiece is characterized in that the satellite system setting unit cancels the setting for setting the predetermined satellite system as the priority satellite system for each satellite system when a preset cancellation condition is met.

Images