JP2012215560A - Electronic timepiece and method for controlling electronic timepiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic timepiece capable of reducing power consumption and indicating accurate time by efficiently receiving satellite signals, and to provide a method for controlling the electronic timepiece.SOLUTION: An electronic timepiece 1 includes: a satellite signal receiving part 10A for receiving a satellite signal; automatic receiving means 24 for actuating the satellite signal receiving part 10A to receive the satellite signal and acquiring time information included in the satellite signal; a time information correction part 26 for counting time and correcting the counted time by the time information acquired by the automatic receiving means 24; and receiving condition determination means 23 for determining whether or not signal reception is applicable to a receiving condition. When the receiving condition determination means 23 determines that the signal reception is applicable to the receiving condition, the automatic receiving means 24 executes automatic receiving processing.

Description

  The present invention relates to an electronic timepiece that receives a radio wave transmitted from a position information satellite such as a GPS satellite and obtains a current date, time, and the like, and an electronic timepiece control method.

  In a GPS (Global Positioning System) system, which is a system for positioning its own position, a GPS satellite having an orbit around the earth is used, and this GPS satellite is provided with an atomic clock. For this reason, the GPS satellite has extremely accurate time information (GPS time, satellite time information).

A portable electronic device having means for correcting internal time data measured by a time measuring means using time information included in the navigation data is known (see Patent Document 1).
This Patent Document 1 describes a control method in which indoors and outdoors are determined by an ultraviolet sensor and GPS is received only when outdoors.

JP 2006-194697 A

However, although the method of Patent Document 1 describes a method of selectively receiving navigation data transmitted from a satellite that is difficult to receive indoors, it is misrecognized by indoor lighting, or even outdoors. Reception may be difficult in places where overhead is low due to the effects of multipath and high-rise buildings.
On the other hand, since the daily behavior pattern of the user often has a certain periodicity, the reception success probability can be increased by executing the satellite signal reception processing based on the behavior pattern.

  In view of the above problems, an object of the present invention is to provide an electronic timepiece that can efficiently receive satellite signals, reduce power consumption, and display an accurate time, and an electronic timepiece control method. And

  An electronic timepiece according to the present invention includes a receiving unit that receives a satellite signal transmitted from a position information satellite, and an automatic reception process that activates the receiving unit to receive the satellite signal and acquire time information included in the satellite signal. Automatic reception means for performing time measurement, time measurement means for correcting the time being measured according to time information acquired by the automatic reception means, and reception for determining whether or not a set reception condition is satisfied And a condition determination unit, wherein the automatic reception unit executes the automatic reception process when the reception condition determination unit determines that the reception condition is satisfied.

In the present invention, it is determined whether or not the reception condition determination unit satisfies the reception condition, and when it is determined that the reception condition is satisfied, the automatic reception unit performs automatic reception processing. This reception condition is a condition regarding whether or not the reception is successful. For example, a condition based on a user's behavior pattern such as a past reception history or a current user's behavior state can be set. For this reason, the reception success probability can be improved by executing the automatic reception process when the reception condition is satisfied.
Therefore, according to the electronic timepiece of the present invention, the probability of successful reception and time information acquisition during automatic reception is increased, accurate time can be displayed, and unnecessary reception processing can be prevented to save power. Can be realized.

  In the electronic timepiece of the invention, the electronic timepiece includes a state determination unit that determines whether or not the satellite signal can be received, and the automatic reception unit is not in a state in which the satellite signal can be received by the state determination unit. If it is determined, it is preferable to interrupt the reception processing of the satellite signal by the receiving means.

  In an electronic timepiece, satellite signal reception processing by the receiving means consumes a large amount of power. For this reason, when it is determined by the state determination unit that the satellite signal cannot be received, the automatic reception unit can omit unnecessary reception processing by interrupting the reception processing. Therefore, useless power consumption can be suppressed and power saving of the electronic timepiece can be achieved.

  In the electronic timepiece according to the aspect of the invention, the automatic reception unit may be a predetermined time after the state determination unit determines that the satellite signal is not receivable and interrupts the reception process of the satellite signal by the reception unit. It is preferable that after the elapse of time, the satellite signal reception process is repeatedly executed a predetermined number of times until the satellite signal can be received.

Immediately after the satellite signal reception process is interrupted when it is determined by the state determination means that the satellite signal cannot be received, the automatic reception process is executed again and the satellite signal reception process is executed again. The probability of receiving failure is high. On the other hand, the probability of success of the reception process can be improved by executing the automatic reception process again after a lapse of a predetermined time after the reception process is interrupted on the assumption that the satellite signal cannot be received.
At this time, since the satellite signal reception process is repeated a predetermined number of times until the satellite signal can be received, the probability of success can be further improved.
On the other hand, if the satellite signal cannot be received even if the reception process is executed a predetermined number of times, the subsequent reception process is terminated, so that useless power consumption can be suppressed.

  In the electronic timepiece according to the aspect of the invention, the state determination unit can receive the satellite signal based on at least one of the number of captured position information satellites and the signal strength of the received satellite signal. It is preferable to determine whether or not.

  Examples of failure in receiving a satellite signal include a case where a position information satellite cannot be captured or a case where a satellite signal received from a captured position information satellite is low and the satellite signal cannot be received appropriately. For this reason, the state determination means determines whether or not the satellite signal can be received by determining based on at least one of the number of captured position information satellites and the signal strength of the received satellite signal. Can be judged appropriately.

  In the electronic timepiece of the invention, the reception condition determining means sets a success time range determined based on a reception time when reception is successful in the past reception processing as the reception condition, and is timed by the time measuring means. It is preferable that it is determined that the reception condition is satisfied when a certain time is included in the success time range.

  When the user's behavior pattern is the same, if reception is performed in the same time zone as in the past successful reception, the probability of successful reception is high. In the present invention, as a reception condition, a time range at the time of successful reception in the past is set. Therefore, it is possible to perform reception in a reception success time zone based on past user behavior patterns, and to improve the probability of successful reception.

  In the electronic timepiece of the invention, the reception condition determining means sets a failure time range determined based on a reception time when reception has failed in the past reception processing as the reception condition, and is timed by the time measuring means. It is preferable that it is determined that the reception condition is not satisfied when a certain time is included in the failure time range.

  When the user's behavior pattern is the same, if the reception is performed in the same time zone as the past reception failure, the probability of reception failure is high. In the present invention, a time range at the time of past reception failure is set as the reception condition. Therefore, since reception is not performed during a reception failure time zone based on past user behavior patterns, useless reception processing can be prevented and power saving can be achieved.

  In the electronic timepiece of the invention, the reception condition determining means sets, as the reception conditions, a success time range determined based on a reception time when reception was successful in the past reception processing, and a day of the week when the reception was successful. When the time counted by the time measuring means is included in the success time range and the day of the week matches the day of the week corresponding to the success time range, it is preferable to determine that the reception condition is satisfied.

  According to the present invention, not only the success time range but also the day of the week when the reception is successful is determined at the same time, so that even when the user's behavior pattern differs depending on the day of the week, the reception process can be performed according to the behavior pattern. it can. For this reason, the probability of successful reception can be further improved.

  In the electronic timepiece of the invention, the reception condition determining means sets, as the reception condition, a failure time range determined based on a reception time when reception has failed in the past reception processing, and a day of the week when the reception has failed. When the time counted by the time measuring means is included in the failure time range and the day of the week matches the day of the week corresponding to the failure time range, it is preferable to determine that the reception condition is not satisfied. .

  According to the present invention, not only the failure time range but also the day of the week when the reception fails is determined at the same time. Therefore, even when the user's behavior pattern differs depending on the day of the week, the reception process can be controlled according to the behavior pattern. For this reason, the probability of receiving failure can be further reduced.

  In the electronic timepiece according to the aspect of the invention, it is preferable that the electronic timepiece includes an acceleration sensor, and the reception condition determination unit determines that the reception condition is satisfied when an output value of the acceleration sensor is included in a set acceleration range.

  According to the present invention, since the output value of the acceleration sensor is used as a reception condition, it can be determined whether the electronic timepiece is stationary, whether the user wearing the electronic timepiece is on a vehicle, or walking. . For this reason, the reception process can be performed only when the electronic timepiece is stationary or when the user is walking outdoors, and the probability of successful reception can be further improved.

  In the electronic timepiece according to the aspect of the invention, it is preferable that the reception condition determination unit sets the acceleration range of the reception condition based on an output value of the acceleration sensor when reception is successful or failure in the past reception processing.

  According to the present invention, the reception condition based on the output value of the acceleration sensor can be updated based on the past reception history. For this reason, it can adjust to the receiving conditions according to each user's action pattern, and can improve the probability of receiving successfully.

  In the electronic timepiece of the invention, a solar panel is provided, and the reception condition determining means determines that the reception condition is satisfied when the variation amount of the output value of the solar panel is included in the set fluctuation range. Is preferred.

According to the present invention, since the output value of the solar panel is used as a reception condition, it can be determined whether the electronic timepiece is stationary, whether the user wearing the electronic timepiece is on a vehicle, or is walking. . For this reason, the reception process can be performed only when the electronic timepiece is stationary or when the user is walking outdoors, and the probability of successful reception can be further improved.
Furthermore, since the solar panel can also be used for outdoor determination, it is not necessary to provide another sensor such as an acceleration sensor, cost and power consumption can be reduced, and the electronic watch can be easily downsized.

  In the electronic timepiece according to the aspect of the invention, it is preferable that the reception condition determination unit sets the variation range of the reception condition based on an output value of the solar panel at the time of successful reception or failure in the past reception processing.

  According to the present invention, the reception condition based on the output value of the solar panel can be updated based on the past reception history. For this reason, it can adjust to the receiving conditions according to each user's action pattern, and can improve the probability of receiving successfully.

  The electronic timepiece of the invention includes an outdoor determination unit that determines whether or not the electronic timepiece is placed outdoors. The automatic reception unit is determined to be outdoor by the outdoor determination unit, and the reception condition determination unit It is preferable to execute the automatic reception process only when it is determined that the reception condition is satisfied.

Here, as in the method described in Patent Document 1 described above, a method is adopted in which indoor / outdoor determination is performed and navigation data transmitted from a satellite that is difficult to receive indoors is selectively received outdoors. In some cases, it may be difficult to receive the signal in a place where the degree of openness is low due to the effect of multipath or the effect of a high-rise building, etc.
On the other hand, the automatic reception means performs automatic reception processing only when it is determined by the outdoor determination means that it is placed outdoors and it is further determined by the reception condition determination means that the reception condition is satisfied. According to this, the probability of successful reception can be further improved and reception processing can be performed efficiently compared to the case where reception processing is performed only with either one of outdoor determination and reception conditions. it can. Therefore, since the probability that time information can be acquired at the time of execution of automatic reception processing is increased, accurate time can be displayed, and unnecessary reception processing can be prevented, and power saving can be reliably realized.

  In the electronic timepiece of the present invention, the electronic timepiece includes a light amount detection unit that detects a light amount applied to the electronic timepiece, and the outdoor determination unit is It is preferable to determine that the electronic timepiece is outdoors.

The amount of light differs greatly between indoor illumination light and outdoor sunlight. For this reason, it is possible to set in advance a light amount threshold value that can distinguish between when the electronic timepiece is indoors and when it is outdoors.
Thereby, if the light quantity detected by the light quantity detection means is equal to or greater than the light quantity threshold value, it can be assumed that the electronic timepiece is located outdoors, and if it is determined in combination with the reception condition, the probability of success in obtaining time information The power consumption can be reduced because there is no need to perform useless reception processing.

  In the electronic timepiece according to the aspect of the invention, the light amount detection unit is configured by a solar panel, and the outdoor determination unit is configured to open the electronic timepiece when the power generation amount or the open voltage of the solar panel is equal to or greater than a preset threshold value. It is preferable to determine that there is.

  If a solar panel is used as the light quantity detection unit, the power generation device and the light quantity detection unit can be used together with the solar panel. Accordingly, the cost can be reduced as compared with the case where a dedicated optical sensor or the like is provided as the light amount detection unit.

Alternatively, the present invention performs a reception means for receiving a satellite signal transmitted from a position information satellite, and an automatic reception process for operating the reception means to receive the satellite signal and acquiring time information included in the satellite signal. Automatic receiving means, time keeping time, time keeping means for correcting the time being measured by the time information acquired by the automatic receiving means, and receiving conditions for determining whether or not the set receiving conditions are met An electronic timepiece control method comprising: a determination unit, wherein the automatic reception unit executes the automatic reception process when the reception condition determination unit determines that the reception condition is satisfied. And
According to the present invention, the same effect as the electronic timepiece can be obtained.

Schematic which shows the main circuit structures of the electronic timepiece which concerns on 1st embodiment of this invention. The block diagram which shows the main system structures of the electronic timepiece of FIG. The graph which shows an example of the relationship between illumination intensity and electric power generation amount. The flowchart which shows the reception process in 1st embodiment of this invention. The flowchart which shows the reception process in 1st embodiment of this invention. The flowchart which shows the reception process in 2nd embodiment of this invention. The flowchart which shows the reception process in 2nd embodiment of this invention. The block diagram which shows the system configuration | structure of the electronic timepiece which concerns on 3rd embodiment of this invention.

[First embodiment]
Hereinafter, a first embodiment according to the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram illustrating a main hardware configuration and the like of a wristwatch 1 with a GPS satellite signal receiving device according to a first embodiment.
A wristwatch with a GPS satellite signal receiving device (hereinafter referred to as an “electronic clock”) 1 according to the first embodiment receives satellite signals from a plurality of GPS satellites orbiting over the earth in a predetermined orbit and receives satellite time. It is configured so that information can be acquired and the internal time information can be corrected and displayed.
These GPS satellites are examples of position information satellites in the present invention, and a plurality of these GPS satellites exist above the earth. Currently, about 30 GPS satellites orbit.
The electronic timepiece 1 is provided with buttons and crowns that are external operation members.

[Circuit configuration of electronic watch]
Next, the circuit configuration of the electronic timepiece 1 will be described.
As shown in FIG. 1, the electronic timepiece 1 includes a GPS device (GPS module) 10, a control unit (CPU) 20, a storage device (storage unit) 30, an input device 40, a display device 50, a secondary battery 60, a solar panel. 70. The storage device 30 includes a RAM 31 and a ROM 32. Each of these devices communicates data via the data bus 80 or the like.
The display device 50 includes a time display drive unit 51 and a time display unit 52 (both see FIG. 2). Among these, the time display unit 52 includes a pointer (second hand, minute hand, hour hand) and a display for displaying time and positioning information, and the time display driving unit 51 drives a motor and a display for driving the pointer. It consists of a circuit.
The secondary battery 60 is a battery that can store the power generated by the solar panel 70 that is a power generation device, and a power source that supplies power to the electronic timepiece 1 is configured by the secondary battery 60 and the solar panel 70. ing.

[Configuration of GPS device]
The GPS device 10 includes a GPS antenna 11 and processes satellite signals received via the GPS antenna 11 to acquire time information and position information.
The GPS antenna 11 includes a patch antenna that receives satellite signals from the plurality of GPS satellites. The GPS antenna 11 is disposed on the back side of the dial and is configured to receive radio waves that have passed through the front glass and the dial of the electronic timepiece 1.
For this reason, the dial and the surface glass are made of a material that transmits radio waves that are satellite signals transmitted from GPS satellites. For example, the dial is made of plastic.

  The GPS device 10 receives an RF (Radio Frequency) unit that receives a satellite signal transmitted from a GPS satellite and converts it into a digital signal, and a BB unit (baseband unit) that performs correlation determination of the received signal and performs synchronization. And a satellite signal receiving unit 10A (see FIG. 2) having an information acquisition unit that acquires time information and positioning information from the navigation message (satellite signal) demodulated by the BB unit.

The RF unit includes a bandpass filter, a PLL circuit, an IF filter, a VCO (Voltage Controlled Oscillator), an ADC (A / D converter), a mixer, an LNA (Low Noise Amplifier), an IF amplifier, and the like.
The satellite signal extracted by the band pass filter is amplified by the LNA, mixed with the VCO signal by the mixer, and down-converted to IF (Intermediate Frequency). The IF mixed by the mixer passes through an IF amplifier and IF filter, and is converted into a digital signal by an ADC (A / D converter).

The BB unit generates a local code generation unit that generates a local code composed of the same C / A code as that used at the time of transmission by a GPS satellite, and a correlation value between the local code and a reception signal output from the RF unit. And a correlation unit to calculate.
If the correlation value calculated by the correlator is equal to or greater than a predetermined threshold, the C / A code used for the received satellite signal matches the generated local code, and the satellite signal is captured. (Synchronized). Therefore, the navigation message can be demodulated by correlating the received satellite signal with the local code.

The information acquisition unit acquires time information and position information from the navigation message demodulated by the BB unit. That is, the navigation message transmitted from the GPS satellite includes preamble data, HOW (Handover Word) TOW (Time of Week, also referred to as “Z count”), and subframe data. There are subframe data from subframe 1 to subframe 5. Each subframe includes, for example, satellite correction data including week number data and satellite health data, and ephemeris (detailed orbit information for each GPS satellite). And data such as almanac (general orbit information of all GPS satellites).
Therefore, the information acquisition unit extracts a predetermined data portion from the received navigation message, and acquires time information and position information. Therefore, in the present embodiment, the GPS device 10 constitutes a receiving unit.

The ROM 32 of the storage device 30 stores a program executed by the control unit 20.
On the other hand, the RAM 31 of the storage device 30 stores satellite signals acquired by reception, time information and reception results described later, and position information calculated by positioning calculation when received in the positioning mode.
Accordingly, the RAM 31 includes a time information storage unit 311 that stores time information acquired by reception, and a reception result storage unit 313 that stores reception results (both refer to FIG. 2).

FIG. 2 is a diagram illustrating a system configuration block of the electronic timepiece 1.
The control unit (CPU) 20 controls the satellite signal receiving unit 10A of the GPS device 10 and corrects the time information based on the acquired time information.
The control unit 20 performs various controls according to programs stored in the ROM 32. Therefore, the control unit 20 includes functions shown as an outdoor determination unit 21, an automatic reception time determination unit 22, a reception condition determination unit 23, an automatic reception unit 24, a state determination unit 25, and a time information correction unit 26.

The outdoor determination means 21 determines whether the electronic timepiece 1 is placed outdoors, that is, whether it is in an environment suitable for receiving satellite signals, with reference to the power generation amount and open circuit voltage of the solar panel 70.
Specifically, the outdoor determination means 21 is suitable for receiving the satellite signal when the electronic timepiece 1 is outdoors when the power generation amount (light amount) from the solar panel 70 is equal to or greater than a predetermined light amount threshold value. It is determined that the satellite signal can be acquired. The light amount threshold is set based on the relationship between the illuminance of light incident on the solar panel 70 and the amount of power generation.

FIG. 3 is a graph showing the relationship between the relative power generation amount and the illuminance when the power generation amount of 10,000 lx (10,000 lux) is 1.
As shown in FIG. 3, the amount of power generated by the solar panel 70 is highest in clear sky (daytime), and the amount of power generated in cloudy sky is lower than that in clear sky. Furthermore, in the case of indoors, the amount of power generation is reduced compared to cloudy weather.
And as the power generation environment is outdoor, it is better than indoors regardless of whether it is cloudy or sunny, the light intensity threshold is indoor (about 5000 lx: about 5000 lux or less) and outdoor (about 5000 lx or more) The power generation amount is set to a value that can be distinguished. In the case of FIG. 3, if the light quantity threshold value in the relative power generation amount is set to about 0.5, it is possible to determine whether it is indoors or outdoors based on the power generation amount. When the electronic timepiece 1 is disposed outdoors, the reception environment from the GPS satellite can also be considered good.
On the other hand, when the power generation amount from the solar panel 70 is less than the light amount threshold value, the outdoor determination means 21 determines that the electronic timepiece 1 is indoors and is not suitable for acquiring satellite signals. .

The automatic reception time discriminating means 22 determines whether or not the time for automatic reception has come based on the internal clock timed by the time information correction unit 26 described later and the previous reception result stored in the reception result storage unit 313. Judgment. For example, when the automatic reception is set to be performed every 24 hours (reception once a day), the automatic reception time determination unit 22 determines that the previous reception is successful 24 When it is determined that time has elapsed, a signal instructing to start automatic reception is output.
In addition, when the previous reception has failed, the automatic reception time determination unit 22 preferably instructs the start of automatic reception at a reception interval at the time of reception failure, such as one hour after the reception. In this way, even after reception failure, since reception processing is performed at a time interval shorter than the normal reception interval, it is possible to prevent a state in which time information cannot be acquired from continuing for a long time.

  The reception condition determination unit 23 determines whether or not the set reception condition is satisfied when the automatic reception start is instructed by the automatic reception time determination unit 22. The specific contents of this determination method will be described later.

  The automatic reception unit 24 controls execution of automatic reception according to the determination results of the outdoor determination unit 21 and the reception condition determination unit 23. That is, the automatic reception means 24 determines that the outdoor reception means 21 determines that it is outdoors after the automatic reception time determination means 22 instructs automatic reception, and the reception condition determination means 23 determines that the reception condition is met. When this is done, the satellite signal receiver 10A of the GPS device 10 is controlled to perform automatic reception.

  The automatic receiving unit 24 may execute automatic reception in consideration of the voltage condition of the secondary battery 60. That is, even if the automatic reception condition is satisfied by the outdoor determination and the reception condition determination, automatic reception may not be performed if the voltage of the secondary battery 60 is less than a predetermined value (for example, 3.6 V). .

For example, the reception condition determination unit 23 detects the remaining battery level of the secondary battery 60 by voltage, determines whether or not the battery voltage is equal to or higher than a predetermined value, and outputs the determination result to the automatic reception unit 24. Good. If the reception process is performed in a state where the remaining battery level is low, the battery voltage may be drastically reduced due to power consumption due to reception, and the system may be down. For this reason, system down can be prevented beforehand by controlling not to perform reception processing in a state where the battery voltage is lower than a predetermined value.
However, as described above, since the outdoor determination unit 21 detects the power generation amount of the solar panel 70 and performs the reception process only when the power generation amount is equal to or greater than a predetermined value, the secondary battery 60 is also charged by the solar panel 70. The battery voltage can also be expected to improve. Therefore, the reception process can be performed without directly detecting the remaining battery level of the secondary battery 60.

The state determination unit 25 functions after the automatic reception process is started by the automatic reception unit 24, and the electronic timepiece 1 can receive the satellite signal based on the reception result of the satellite signal by the satellite signal reception unit 10A. It is determined whether or not there is.
Specifically, the state determination unit 25 determines whether the number of GPS satellites (captured satellites) captured by the satellite signal receiver 10A that has started receiving satellite signals under the control of the automatic reception unit 24 is 1 or more. Determine whether or not. If it is determined that the satellite signal can be received from one or more GPS satellites as a result of the determination of the number of satellites, the state determination unit 25 further determines whether the signal strength of the received satellite signal is equal to or greater than a predetermined value. Determine whether. The predetermined value is set to a signal intensity that can appropriately acquire time information and the like from the satellite signal. When it is determined that the signal strength of the received satellite signal is equal to or greater than the predetermined value, the state determination unit 25 determines that the satellite signal can be received. On the other hand, when the number of captured satellites is 0, or when the signal strength of the satellite signal is less than a predetermined value, the state determination unit 25 determines that the satellite signal cannot be received.
In addition, it is good also as a structure which determines either the number of acquisition satellites or the signal strength of a satellite signal.

A signal indicating the determination result is output from the state determination unit 25 to the automatic reception unit 24.
If this signal is a signal indicating that the satellite signal cannot be received, the automatic receiving means 24 interrupts the satellite signal reception process, and executes the reception process again after a predetermined time. At this time, the satellite signal reception process is repeatedly executed at the predetermined time interval until the satellite signal can be received and time information is acquired. However, in order to suppress useless power consumption, the number of re-executions of the reception process is set to a predetermined number (for example, three times).
On the other hand, if the signal is a signal indicating a state in which the satellite signal can be received, the automatic receiving unit 24 continuously executes the satellite signal reception process, and acquires time information from the received satellite signal.

The satellite signal receiving unit 10A performs reception processing under the control of the automatic receiving unit 24, and acquires the number of captured GPS satellites (captured satellites) and the received satellite signals (in detail, A reception signal corresponding to the satellite signal) is output to the state determination means 25 described above.
In addition, the satellite signal receiving unit 10A performs the reception process to acquire time information. The time information received by the satellite signal receiving unit 10A is stored in the time information storage unit 311 of the RAM 31.
Further, the reception result in the satellite signal receiving unit 10A, specifically, the reception result information indicating whether or not the reception is successful, and the reception start time at that time are stored in the reception result storage unit 313 of the RAM 31.

The time information correction unit 26 keeps updating the time display of the time display unit 52 via the time display driving unit 51 by measuring the internal time based on a reference signal from an oscillation circuit (not shown). Therefore, the time information correcting unit 26 also constitutes the time measuring means of the present invention.
The time information correction unit 26 corrects the time of the internal clock based on the time information stored in the time information storage unit 311 and the time difference information of the current location. The time difference information may be set manually by the user, or a satellite signal is received and a positioning process is performed to obtain the current location, and time difference information corresponding to the current location is obtained from the time difference table stored in the RAM 31. May be set.

[Reception conditions]
Next, the reception conditions used by the reception condition determination unit 23 will be described.
The reception condition determination unit 23 includes a success time range determined based on a reception start time when reception is successful in the past reception processing stored in the reception result storage unit 313 as reception conditions, and when reception fails. A failure time range determined based on the reception start time is set.
For example, when “reception start time: 7:00” is stored as the past reception success history, the reception condition determination unit 23 performs the 30 minutes before and after the reception start, that is, from 6:30 to 7:30. Set the reception condition as the success time range in minutes.
In addition, when “reception start time: 17:00” is stored as the past reception failure history, the reception condition determination unit 23 performs 30 minutes before and after the reception start, that is, from 16:30 to 17:30. Set the reception condition as the failure time range with the minute time range.

When an automatic reception start is instructed from the automatic reception time determination means 22, the internal time measured by the time information correction unit 26 is included in the success time range and not included in the failure time range. The reception condition determination unit 23 determines that the reception condition is met.
If the success time range and the failure time range overlap, a newer reception record may be prioritized. That is, when the success time range is from 16:00 to 17:00 and the failure time range is from 16:30 to 17:30, the reception process in which the success time range is set is set to the failure time range. If it is after the reception process, that is, if it is newer, the success time range is maintained and the failure time range is reset from 17:00 to 17:30. Therefore, in this embodiment, when the internal time is included in the success time range, it is set so that it is not automatically included in the failure time range.

In addition, for example, when receiving data is not stored in the reception result storage unit 313 such as when receiving for the first time after power-on, the reception condition cannot be set. In this case, as an initial condition, the time range may be set in advance when the electronic timepiece 1 is shipped from the factory, or may be set by the user inputting the time range.
Furthermore, a manual reception mode may be prepared, and when the user performs a manual reception process, the reception condition determination unit 23 may set a time range based on the manual reception start time.
In this embodiment, as shown in FIG. 2, the outdoor determination result by the outdoor determination unit 21 is output to the automatic reception unit 24 via the reception condition determination unit 23, but is automatically received from the outdoor determination unit 21. You may output directly to the means 24.

[Receive processing]
4 and 5 are flowcharts showing the reception process.
Next, the control in the control part 20 is demonstrated with reference to FIG.4 and FIG.5.
The reception process executed by the automatic reception unit 24 is a process executed when the automatic reception time determination unit 22 refers to the internal time and determines that the automatic reception process time has come.
In this reception process, as shown in FIG. 4, the automatic reception time discriminating means 22 refers to the internal time and determines whether a predetermined time (for example, 24 hours) has passed since the previous reception and the automatic reception time has come. (S1). In the case of No in S1, the process of S1 is continued until the automatic reception time is reached.

On the other hand, when the automatic reception time is reached and it is determined Yes in S1, the outdoor determination unit 21 determines whether or not it is outdoor based on the power generation amount of the solar panel 70 (S2).
In the present embodiment, as described above, the outdoor determination unit 21 determines whether the power generation amount of the solar panel 70 is equal to or greater than the light amount threshold value, so that the electronic timepiece 1 is in a place where the GPS signal can be received, that is, outdoors. Determine whether.

And when it determines with No by S2, the outdoor determination means 21 continues the determination process of S2.
On the other hand, when it is determined Yes in S2, the reception condition determination unit 23 determines whether the reception condition is satisfied (S3).
In the present embodiment, as described above, the reception conditions are a success time range and a failure time range based on the reception history stored in the reception result storage unit 313. Accordingly, the reception condition determination unit 23 determines that the reception condition is satisfied if the internal time counted by the time information correction unit 26 falls within the success time range. As described above, since the success time range does not overlap with the failure time range, when the internal time falls within the success time range, it does not automatically fall into the failure time range.
And when it determines with No by S3, the outdoor determination means 21 returns to S2, and continues a process.

On the other hand, when it is determined Yes in S3, the automatic receiving unit 24 executes automatic reception processing, drives the satellite signal receiving unit 10A, and starts receiving satellite signals (S4).
Next, based on the number of GPS satellites captured by the satellite signal receiving unit 10A and the signal strength of the satellite signal received from the GPS satellite, the state determination unit 25 causes the electronic timepiece 1 to convert the satellite signal. It is determined whether or not reception is possible (S5).
When it is determined No in S5, the automatic receiving unit 24 interrupts the reception of the satellite signal by the satellite signal receiving unit 10A (S6).
Then, the automatic receiving means 24 counts the number of times (impossible number of times) determined that the satellite signal cannot be received in the automatic reception process (S7). Specifically, the automatic receiving means 24 increases the impossibility count initialized (that is, set to “0”) by 1 with the start of the automatic receiving process.

Thereafter, the automatic receiving means 24 determines whether or not the impossible count has exceeded a predetermined count (S8). This predetermined value is set in advance, and in the present embodiment, the predetermined number of times is set to “3” as described above, but can be changed as appropriate.
When it determines with Yes by this S8, the automatic reception means 24 advances a process to S14.

When it is determined No in S8, the automatic receiving unit 24 determines whether or not a predetermined time has elapsed since the reception of the satellite signal was interrupted in S6 (S9). The predetermined time is 5 minutes in this embodiment, but can be changed as appropriate.
When it is determined No in S9, the automatic receiving unit 24 continues the determination process in S9 until a predetermined time has elapsed.
On the other hand, when it is determined Yes in S9, the automatic receiving unit 24 returns to S4. Thereby, S4 to S9 are repeated the predetermined number of times until the satellite signal can be received.

  If it is determined Yes in S5, as shown in FIG. 5, the automatic receiving means 24 determines whether or not the time information has been successfully received as a result of the reception processing performed by the satellite signal receiving unit 10A. (S10). Note that the reception was successful when the satellite signal was received and the time information could be acquired.In other cases, for example, when the satellite signal was received but the time information could not be acquired, the reception was successful. Judge that it failed.

  When it is determined as Yes in S10 and the reception is successful, the satellite signal reception unit 10A ends the reception process, stores the acquired time information in the time information storage unit 311 and receives the reception result indicating that the reception is successful. The information and the reception start time when reception is successful are stored in the reception result storage unit 313 (S11).

And the time information correction part 26 performs a time correction process using the time information memorize | stored in the time information storage part 311 (S12).
Further, the reception condition determination unit 23 updates the reception condition, specifically the success time range, using the reception result added to the reception result storage unit 313 (S13).

On the other hand, if it is determined Yes in S8, and if it is determined No in S10 and reception is unsuccessful, the satellite signal receiving unit 10A ends the reception process, but the time information cannot be acquired. Time information is not stored in the information storage unit 311. Then, the satellite signal receiving unit 10A causes the reception result storage unit 313 to store the reception result information indicating that reception has failed and the reception start time at the time of reception failure (S14).
Furthermore, even when reception fails, the reception condition determination unit 23 updates the reception condition, specifically the failure time range, using the reception result added to the reception result storage unit 313 (S13).

Thus, one reception process by the automatic reception unit 24 is completed.
Thereafter, if it is determined in S1 that the automatic reception time has come, the processes of S2 to S14 are executed.

[Operational effects of the first embodiment]
According to the present embodiment, the reception condition determination unit 23 determines whether the reception condition based on the past reception result is satisfied, and when the reception condition is satisfied, the automatic reception unit 24 executes the automatic reception process. Yes. For this reason, the probability that the satellite signal is successfully received can be increased, and the reception process can be performed efficiently.

In addition, the reception condition determination unit 23 sets a success time range based on the past reception success record. For this reason, it is possible to perform reception in a successful reception time zone based on past user behavior patterns, and to improve the probability of successful reception.
Further, the reception condition determination means 23 sets a failure time range based on the reception failure record. For this reason, since reception is not performed during a reception failure time zone based on past user behavior patterns, useless reception processing can be prevented and power saving can be achieved.
Since the reception condition determination unit 23 performs reception processing with reference to both the reception success history and the reception failure history, the probability of successful reception compared to the case where reception processing is performed using only one of the histories. Can be improved more.
In addition, when the time zone of the success time range and the failure time range overlap, the most recent reception result is prioritized, so even if the behavior pattern changes, reception processing that matches the more recent behavior pattern is performed. Therefore, the probability of successful reception can be further improved.

  In S5, when it is determined by the state determination unit 25 that the satellite signal cannot be received, the automatic reception unit 24 interrupts the reception process by the satellite signal reception unit 10A. According to this, useless reception processing can be omitted. Therefore, useless power consumption can be suppressed and power saving of the electronic timepiece can be achieved.

If it is determined by S5 that the satellite signal cannot be received in S5, the automatic receiving unit 24 receives the satellite signal after a predetermined time has elapsed since the satellite signal reception process was interrupted in S6. Run the process again. According to this, by waiting for the elapse of the predetermined time, the rate of change from a state in which satellite signals cannot be received to a state in which reception is possible increases, so the probability of successful reception processing can be improved.
At this time, since the satellite signal reception process is repeated a predetermined number of times until the satellite signal can be received, the probability of success can be further improved. On the other hand, if the satellite signal cannot be received even if the reception process is executed a predetermined number of times, the automatic reception process is terminated (satellite signal reception process is not executed), so useless power consumption. Can be suppressed.

  Examples of satellite signal reception failure include a case where a GPS satellite cannot be captured or a case where the signal strength of a satellite signal received from a captured GPS satellite is low. On the other hand, the state determination means 25 appropriately determines whether or not the satellite signal can be received by making a determination based on the number of captured position information satellites and the signal strength of the received satellite signal. Can be judged.

The automatic reception means 24 performs automatic reception processing only when it is determined by the outdoor determination means 21 that the automatic reception means 24 is located outdoors, and when the reception condition determination means 23 determines that the reception condition is satisfied.
Here, when it is determined whether or not the automatic reception process can be executed only by the outdoor determination by the outdoor determination unit 21, the satellite signal reception process may be performed in an environment not necessarily suitable for reception. For example, when sunlight hits the electronic timepiece 1 momentarily on a train on the way to work, there is a possibility that it will be recognized as being outdoors and automatic reception will be performed. In this case, the train moves at a high speed, and frequently and continuously enters the shade of a station or a building, so there is a high possibility that reception will fail.

  On the other hand, even if the electronic timepiece 1 is determined to be outdoors by the outdoor determination means 21, if the reception processing in the train has failed in the past during commuting, the electronic timepiece 1 does not receive in the same time zone. The reception process is performed during a time period in which it is determined that the vehicle is outdoors and the past reception has been successful. In other words, the electronic timepiece 1 adjusts the reception time with reference to the results of successful and unsuccessful reception, and performs the reception process only in the time zone in which the reception was successful in the past according to the user's behavior pattern. For this reason, even when automatic reception processing is executed, the probability of successful reception can be improved. Therefore, the probability that the time information can be successfully acquired by automatic reception at the time of automatic reception is increased, the time display unit 52 can display an accurate time, and it is possible to prevent wasteful reception processing, thereby realizing power saving. System down can also be prevented.

  Furthermore, the outdoor determination means 21 detects the power generation amount of the solar panel 70 and determines whether or not the electronic timepiece 1 is outdoors based on the power generation amount. According to this, when the reception environment is bad such as when the electronic timepiece 1 is placed indoors, the satellite signal reception processing is not performed. Therefore, when the satellite signal reception process is performed, the satellite signal can be efficiently received. Therefore, the possibility of succeeding in obtaining time information is increased, power consumption can be reduced, and battery life can be extended.

  Furthermore, since the condition used by the reception condition determination means 23 is only time information, it is not necessary to provide a special sensor or the like separately to acquire information for determining the reception condition, thereby preventing an increase in power consumption. In addition, it can be easily applied to a small electronic timepiece such as a wristwatch.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
6 and 7 are flowcharts showing a reception process executed by the electronic timepiece according to the second embodiment.
The electronic timepiece according to the second embodiment differs from the electronic timepiece 1 according to the first embodiment in that not only the time range but also the day of the week is added as a reception condition to be determined by the reception condition determination unit 23. To do. For this reason, since the configuration of the electronic timepiece according to the present embodiment is the same as that of the electronic timepiece 1 according to the first embodiment, description thereof is omitted.
Also, in the processing of the second embodiment shown in the flowcharts of FIGS. 6 and 7, the same processes as those in the flowchart of the first embodiment shown in FIGS.

  In the electronic timepiece according to the second embodiment, as shown in FIG. 7, when it is determined Yes (successful reception) in S10, the satellite signal reception unit 10A ends the reception process and stores the reception result. The information on the day of the week on which the reception process was performed is stored in the unit 313 together with the reception start time (S11A). The navigation message of the satellite signal is transmitted with reference to 0 o'clock on Sunday at the beginning of the week, and the Z count is the elapsed time from the beginning of the week. Therefore, if this Z count is acquired, the day of the week can be grasped.

  On the other hand, as shown in FIG. 6 and FIG. 7, when it is determined Yes (exceeded the predetermined number) at S8, or when it is determined No (failed reception) at S10, the satellite signal receiving unit 10A ends the reception process, and stores in the reception result storage unit 313 the day of the week on which the reception process was performed, together with the reception start time (S14A). If reception has failed, the day of the week cannot be determined from the Z count, so the day of the week based on the internal time measured by the time information correction unit 26 may be stored.

Then, as shown in FIG. 6, the reception condition determination unit 23 determines that the time and day of the reception process are the success time range in the reception condition determination process of S <b> 3 </ b> A that is executed after it is determined Yes in the outdoor determination process S <b> 2. And the corresponding day of the week information, and the failure time range and the corresponding day of the week information are not met, it is determined that the reception condition is met.
Since other processes are the same as those of the electronic timepiece 1 according to the first embodiment, description thereof is omitted.

[Operational effects of the second embodiment]
Also in the electronic timepiece according to the second embodiment, the same operational effects as those of the electronic timepiece 1 according to the first embodiment can be obtained.
Furthermore, in the reception condition determination of S3A, not only the reception time but also the day information is added to the condition, so that the reception probability can be further improved compared to the electronic timepiece 1 according to the first embodiment.
For example, as a reception success history, since the reception was successful at the time of commuting from home to the station, when a success time range of 30 minutes before and after 7:30, which was the start of reception, was set, in the first embodiment, Since the day-of-week information is not determined, the reception conditions of S3A also apply to holidays such as Saturdays and Sundays whose behavior patterns are different from weekdays. For this reason, even if reception is successful on weekdays, there is a possibility that reception may fail on holidays with different behavior patterns.

On the other hand, according to the electronic timepiece according to the second embodiment, not only the time but also the day of the week is included in the condition. For example, even if a success time range of weekdays (Monday to Friday) is set, Saturday or Sunday Since the day of the week is different, it is possible to prevent reception on the condition of the weekday.
Furthermore, since the determination can be made for each day of the week, the probability of successful reception does not decrease even when the user has a different behavior pattern for each day of the week.
Therefore, the probability that the time information can be reliably received is increased, the power saving of the reception process can be realized, the system down can be surely prevented, and the accurate time can be displayed.

[Third embodiment]
Next, a third embodiment of the present invention will be described.
FIG. 8 is a block diagram showing a system configuration of an electronic timepiece 1A according to the third embodiment of the present invention.
As shown in FIG. 8, the electronic timepiece 1 </ b> A according to the third embodiment further includes an acceleration sensor 90, and uses the output value of the acceleration sensor 90 as a reception condition determined by the reception condition determination unit 23. This is different from the electronic timepiece 1 according to the embodiment. Therefore, in the electronic timepiece 1A according to the third embodiment, the same components as those of the electronic timepiece 1 according to the embodiment are denoted by the same reference numerals, and description thereof is omitted.

An electronic timepiece 1 </ b> A according to the third embodiment includes an acceleration sensor 90 in addition to the configuration of the electronic timepiece 1. The configuration of the electronic timepiece 1 here may be the configuration of the electronic timepiece 1 shown in the first embodiment or the configuration of the electronic timepiece shown in the second embodiment.
The reception result storage unit 313 stores the output value of the acceleration sensor 90 at that time together with the reception result.

  The output value of the acceleration sensor 90 is constant when the electronic timepiece 1A is stationary, and changes when the electronic timepiece 1A moves. In particular, when the user wearing the electronic timepiece 1A is walking, the output value of the acceleration sensor 90 changes greatly because the user moves while swinging his arm. On the other hand, when the user wearing the electronic timepiece 1A is on a vehicle such as an automobile or a train, the output value of the acceleration sensor 90 changes less than when walking.

  Therefore, the reception condition determination unit 23 sets in advance a condition (acceleration range) based on the output value pattern of the acceleration sensor 90 when the electronic timepiece 1A is stationary and when walking. In the reception condition determining means 23, the output value of the acceleration sensor 90 corresponds to the output value when the electronic timepiece 1 is placed on a desk or the like, or when the user is walking. If it does, it is determined that the reception condition is met.

For example, when the maximum output value of the acceleration sensor 90 is less than a preset first threshold value, the reception condition determination unit 23 determines that the electronic timepiece 1A is in a stationary state and determines that the reception condition is satisfied. .
When the maximum output value of the acceleration sensor 90 is equal to or greater than a preset second threshold value (a value greater than the first threshold value), the reception condition determination unit 23 notifies the user who is walking the electronic timepiece 1A. It is determined that the device is attached, and it is determined that the reception condition is satisfied.
On the other hand, when the maximum output value of the acceleration sensor 90 is not less than the preset first threshold value and less than the second threshold value, that is, not included in the set acceleration range, the reception condition determining means 23 is the electronic timepiece. It is determined that the user wearing 1A is in a state of riding the vehicle, and it is determined that the reception condition is not met.

Further, the reception condition determining means 23 is based on the relationship between the reception result (success or failure) stored in the reception result storage unit 313 and the output value of the acceleration sensor 90, and the corresponding condition of the output value of the acceleration sensor 90 ( Acceleration range) is updated. For example, if the maximum output value of the acceleration sensor 90 is less than the second threshold value but the satellite signal is successfully received, the second threshold value is set to the maximum output value (a value smaller than the second threshold value before update). Update to.
On the other hand, when the satellite signal reception fails even though the maximum output value of the acceleration sensor 90 is equal to or greater than the second threshold value, the maximum output value may be changed to a new second threshold value.

[Operational effects of the third embodiment]
In the electronic timepiece 1A according to the third embodiment, in the reception condition determination, the determination is made using the output value of the acceleration sensor 90, so that the electronic timepiece 1A is stationary or a user who is walking. You can determine whether it is installed. When combined with the outdoor determination of the outdoor determination means 21, the electronic timepiece 1A is placed on a desk or the like in the outdoor state, or is worn on the arm of a user walking outdoors. Can be determined. That is, it can be determined that the user is on a vehicle such as a train, a car, or a bus and is not in a state of being temporarily exposed to sunlight.
Therefore, if the reception process is performed when this condition is met, the probability of successful reception is higher than when the vehicle is on a vehicle, so the probability that time information can be acquired can also be improved.

[Modification]
The present invention is not limited to the above embodiments.
For example, in the third embodiment, the electronic timepiece 1A is provided with the acceleration sensor 90, and the electronic timepiece 1A is used in a stationary state, a walking state, or a vehicle. Judging whether or not. However, the present invention is not limited to this, and these states may be determined using the fluctuation amount of the output value of the solar panel 70 instead of the acceleration sensor 90.

That is, when the electronic timepiece is in a stationary state, the angle of the light receiving surface of the solar panel 70 with respect to sunlight is constant, so that the generated current and voltage of the solar panel 70 are substantially the same for a predetermined time, for example, 30 seconds. It is constant.
On the other hand, when the electronic timepiece is mounted on the arm of the user who is walking, the angle of the light receiving surface of the solar panel 70 with respect to sunlight changes greatly, and for a predetermined time, for example, 30 seconds, the solar panel 70 Output values such as generated current and voltage vary greatly.
In addition, when an electronic timepiece is mounted on the arm of a user who is on the vehicle, the generated current and voltage of the solar panel 70 change, but the amount of change is smaller than when walking.
Accordingly, similarly to the case where the acceleration sensor 90 is provided, the output value of the solar panel 70 is detected, and the output value is set based on the output values at the time of successful reception and failure in the past reception processing. By determining whether or not it is included in the range, it can be determined whether or not the reception condition is satisfied. Further, since the acceleration sensor 90 can be omitted, there is an advantage that power consumption can be reduced and it can be easily incorporated into a small electronic timepiece such as a wristwatch.

In the first and second embodiments, as the time range of the reception condition, a success time range based on the reception start time when reception was successful and a failure time range based on the reception start time when reception failed were provided. However, only one of them may be provided.
For example, if only a success time range is provided as a reception condition, only reception processing in a time zone in which reception has been successful in the past is executed. However, in this case, even if reception fails in the same time zone as a result of a change in the user's behavior pattern, the history is not taken into consideration. For this reason, it is possible to improve the reception success probability by setting the failure time range as in the above embodiments.

  In addition, if only the failure time range is provided as the reception condition, reception can be performed in other time zones, so that the time zone in which reception can be performed is widened and reception processing can be performed quickly. However, in this case, since reception processing is executed even in a time zone in which reception has never been successful, there is a possibility that the reception success probability may not be improved at a stage where the reception history is small, and the success time range as in the above embodiments The probability of successful reception can be improved by setting.

  Further, in the third embodiment and the modified example, the output values of the acceleration sensor 90 and the solar panel 70 are stored together with the reception result so that the reception condition can be updated. Only the set reception conditions may be used. In this case, since the manufacturer performs a test and sets the reception condition, reception control according to various usage states can be performed. On the other hand, updating the reception conditions has an advantage that individual reception conditions can be set according to the behavior patterns of individual users.

In the second embodiment, the day of the week information is used as the reception condition, and the day of the week information from Monday to Sunday is used as the day of the week information. Since this holiday information is different for each country and region, the location information obtained by receiving in the positioning mode or the user's input operation can be used to identify the current location country and region and set it according to the country and region. .
Further, the day information may be classified by weekdays and holidays. These weekdays and holidays may be changed by user input operation by setting Monday to Friday as weekdays and Saturday and Sunday as holidays as initial settings. In this case, even if the past reception history includes only information on Monday, it is determined that the same weekday is from Tuesday to Friday, and automatic reception control can be performed using the reception history on Monday.

Furthermore, the time range set in the reception condition is not limited to 30 minutes before and after the reception start time of the reception history, but may be 1 hour before and after, or 15 minutes before and after, and the length of the time range may be set as appropriate.
The success time range and the failure time range are set based on the reception start time at the time of reception, but may be set based on the reception end time. In short, it is only necessary to set a time range corresponding to the time during which the reception process was performed.

  The reception condition is set by adding the conditions of the output values of the acceleration sensor 90 of the third embodiment and the solar panel 70 of the modification to the time range and day of the week conditions of the first and second embodiments. May be. In this case, it is determined that the outdoor determination means 21 is outdoors, and further, the reception condition determination means 23 corresponds to the success time range and the day of the week, and the electronic watch is in a stationary state from the output values of the acceleration sensor 90 and the solar panel 70. The reception process is set so as to be executed only when it is worn by a walking user. In this way, the probability of successful reception when receiving processing can be further increased by the amount of stricter reception conditions.

Furthermore, in each said embodiment, although the outdoor determination means 21 and the reception condition determination means 23 performed outdoor determination and reception condition determination before the reception start, it performs a determination process also during reception, and is in any conditions. You may control to interrupt reception when it becomes no longer applicable.
Moreover, the outdoor determination means 21 may not be provided. In this case, if the reception condition determination unit 23 determines that the reception condition is satisfied, the automatic reception unit 24 may perform the above-described automatic reception process.

  The outdoor determination means 21 is not limited to the determination based on the power generation amount of the solar panel 70 as in the above embodiment. For example, as the outdoor determination means 21, an optical sensor such as a photodiode or a phototransistor may be used. In short, it is only necessary to determine whether or not the electronic timepiece is disposed outdoors.

  In each of the above-described embodiments, the state determination unit 25 is configured to be able to receive the satellite signal based on the number of GPS satellites captured by the satellite signal receiving unit 10A and the signal strength of the received satellite signal. It was determined whether there was. However, the present invention is not limited to this, and it may be determined whether or not the satellite signal can be received based on other determination materials. Further, the state determination unit 25 may be omitted.

  The electronic timepiece of the present invention is not limited to an analog timepiece having hands, but may be applied to a combination timepiece having hands and a display, or a digital timepiece having only a display. Furthermore, the present invention is not limited to wristwatches, but is applied to various clocks such as table clocks and pocket watches, various information terminals having clock functions such as mobile phones, digital cameras, PNDs (personal navigation devices), car navigation systems, and the like. May

The power generation device is not limited to the solar panel 70, and may be a device that operates a generator with a rotating weight. However, the solar panel 70 has an advantage that it can be used for indoor / outdoor determination.
Further, the secondary battery 60 may be charged with electric power from an external power source, for example, an outlet, without providing a power generation device in the electronic timepiece.
Further, the power source is not limited to a rechargeable secondary battery, and may be a primary battery.

  Moreover, although the above-mentioned embodiment demonstrated the GPS satellite as an example of a position information satellite, not only a GPS satellite but a Galileo (EU), GLONASS (Russia), Hokuto (China) as a position information satellite of this invention. Other global navigation satellite systems (GNSS), etc., or position information satellites that transmit satellite signals including time information such as geostationary satellites such as SBAS and quasi-zenith satellites may be used.

  DESCRIPTION OF SYMBOLS 1,1A ... Electronic timepiece, 10 ... GPS apparatus, 10A ... Satellite signal receiving part, 11 ... GPS antenna, 20 ... Control part, 21 ... Outdoor judgment means, 22 ... Automatic reception time discrimination means, 23 ... Reception condition judgment means, 24 ... Automatic reception means 25 ... State determination means 26 ... Time information correction unit 30 ... Storage device 31 ... RAM 311 ... Time information storage unit 313 ... Reception result storage unit 40 ... Input device 50 ... Display Device: 51 ... Time display drive unit, 52 ... Time display unit, 60 ... Secondary battery, 70 ... Solar panel, 90 ... Acceleration sensor.

Claims (16)

Receiving means for receiving satellite signals transmitted from the position information satellite;
An automatic receiving means for operating the receiving means to receive a satellite signal and performing an automatic receiving process for acquiring time information included in the satellite signal;
Timekeeping means that corrects the time being timed according to the time information acquired by the automatic receiving means,
Receiving condition determining means for determining whether or not the set receiving condition is satisfied,
The automatic receiving means includes
The electronic timepiece, wherein the automatic reception process is executed when the reception condition determination unit determines that the reception condition is satisfied. The electronic timepiece according to claim 1,
Comprising a state determining means for determining whether or not the satellite signal can be received;
The electronic timepiece is characterized in that the automatic receiving means interrupts the reception processing of the satellite signal by the receiving means when it is determined by the state determining means that the satellite signal is not ready to be received. The electronic timepiece according to claim 2,
The automatic reception means determines that the satellite signal is not received by the state determination means and the satellite signal is received after a predetermined time has elapsed since the reception processing of the satellite signal by the reception means is interrupted. An electronic timepiece characterized in that the satellite signal reception process is repeatedly performed a predetermined number of times until the signal becomes receivable. The electronic timepiece according to claim 2 or 3,
The state determination means determines whether or not the satellite signal can be received based on at least one of the number of captured position information satellites and the signal strength of the received satellite signal. An electronic watch characterized by The electronic timepiece according to any one of claims 1 to 4,
The reception condition determining means sets, as the reception condition, a success time range determined based on a reception time when reception is successful in the past reception processing,
An electronic timepiece characterized in that when the time measured by the time measuring means is included in the success time range, the reception condition is satisfied. The electronic timepiece according to any one of claims 1 to 5,
The reception condition determining means sets, as the reception condition, a failure time range determined based on a reception time when reception has failed in a past reception process,
When the time measured by the time measuring means is included in the failure time range, it is determined that the reception condition is not satisfied. The electronic timepiece according to any one of claims 1 to 6,
The reception condition determining means sets a success time range determined based on a reception time when reception is successful in the past reception processing, and a day of the week when the reception is successful, as the reception condition,
The time measured by the time measuring means is included in the success time range, and if the day of the week matches the day of the week corresponding to the success time range, it is determined that the reception condition is satisfied. clock. The electronic timepiece according to any one of claims 1 to 7,
The reception condition determining means sets a failure time range determined based on a reception time when reception has failed in a past reception process, and a day of the week at the time of reception failure as the reception condition,
When the time counted by the time measuring means is included in the failure time range and the day of the week matches the day of the week corresponding to the failure time range, it is determined that the reception condition is not met. Electronic clock. The electronic timepiece according to any one of claims 1 to 8,
With an acceleration sensor,
The electronic timepiece according to claim 1, wherein the reception condition determination unit determines that the reception condition is satisfied when an output value of the acceleration sensor is included in a set acceleration range. The electronic timepiece according to claim 9,
The electronic timepiece characterized in that the reception condition determining means sets an acceleration range of the reception condition based on an output value of an acceleration sensor upon successful or failed reception in a past reception process. The electronic timepiece according to any one of claims 1 to 10,
With solar panels,
The reception time determination means determines that the reception condition is met when the fluctuation amount of the output value of the solar panel is included in a set fluctuation range. The electronic timepiece according to claim 11,
The reception time determination means sets the fluctuation range of the reception condition based on the output value of the solar panel at the time of successful or unsuccessful reception in the past reception process. The electronic timepiece according to any one of claims 1 to 12,
It has an outdoor judgment means for judging whether or not it is arranged outdoors,
The automatic receiving means includes
The electronic timepiece is characterized in that the automatic reception process is executed only when it is determined that the outdoor determination unit determines that it is outdoors and the reception condition determination unit determines that the reception condition is satisfied. The electronic timepiece according to claim 13,
Provided with a light amount detector that detects the amount of light irradiated to the electronic timepiece,
The electronic timepiece is characterized in that the outdoor determination unit determines that the electronic timepiece is outdoors when the light amount detected by the light amount detection unit is equal to or greater than a preset light amount threshold value. The electronic timepiece according to claim 14, wherein
The light amount detection unit is configured by a solar panel,
The outdoor time determination means determines that the electronic timepiece is outdoors when the power generation amount or open circuit voltage of the solar panel is equal to or greater than a preset threshold value. Receiving means for receiving satellite signals transmitted from the position information satellite;
An automatic receiving means for operating the receiving means to receive a satellite signal and performing an automatic receiving process for acquiring time information included in the satellite signal;
Timekeeping means that corrects the time being timed according to the time information acquired by the automatic receiving means,
A reception condition determination means for determining whether or not a set reception condition is satisfied, and an electronic timepiece control method comprising:
The automatic receiving means includes
The electronic timepiece control method, wherein the automatic reception process is executed when the reception condition determination unit determines that the reception condition is satisfied.

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