JP5447606B2 - Time correction device, time measuring device with time correction device, and time correction method of time correction device - Google Patents

Description

  The present invention relates to a time correction device that receives radio waves transmitted from a position information satellite and corrects time information such as the current date and time, a time measuring device with a time correction device, and a time correction method for the time correction device.

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. This GPS satellite is equipped with an atomic clock and measures extremely accurate time.
For this reason, conventionally, there has been a proposal for performing time adjustment of a clock with high accuracy using data of atomic clocks of GPS satellites.

Then, when correcting the time information, if the position of itself is unknown, it is necessary to capture at least three GPS satellites in order to output an accurate time. In addition, when an accurate time is output by one GPS satellite, information such as its own approximate position is required.
Therefore, an electronic timepiece has been proposed as an example of a time correction device that selects a GPS satellite that is a position information satellite without grasping its own position or performing a trajectory calculation and corrects the time ( Patent Document 1).

  According to this electronic timepiece, a satellite signal transmitted from a GPS satellite can be received, and a sufficiently accurate timepiece can be realized with a simple configuration. In addition, the time required from the start of signal reception until the accurate time is output is shortened.

However, this electronic timepiece receives for a long time when it is first activated and accumulates a reception history. The accumulated reception history is used when the time is adjusted.
For this reason, when this electronic timepiece is used for a wristwatch, a small device, or the like, the capacity of the battery used in the small device or the like is small, and it is difficult to receive for a long time at the first activation. In addition, in such a small device with a small battery capacity, there is a problem that it is difficult to create a continuous reception history.

  On the other hand, an electronic timepiece has been proposed as an example of a rechargeable timing device using a solar battery or the like. This rechargeable electronic timepiece detects a power generation amount of a power generation means such as a solar battery, and changes the operation state of the timepiece according to the detected power generation amount (Patent Document 2).

Further, such a rechargeable electronic timepiece is charged by storing electric power from a power generation means such as a solar battery in a power storage means, and at the same time, overcharge is prevented. In other words, in the case of the rechargeable type, the amount that can be stored in the power storage means is a fixed amount, and if charging is continued beyond that allowable amount, the power storage means etc. will be loaded, and the life of the solar cell etc. will be shortened. There is a problem of becoming.
For this reason, the structure which discharges so that it may not store more than the capacity | capacitance of an electrical storage means is proposed (patent document 3).

  This prevents overcharging by short-circuiting and discharging when the battery capacity is satisfied. However, the generated electrical energy is changed to heat and discarded. For this reason, there is a problem that the generated power cannot be effectively used.

Japanese Patent Laid-Open No. 10-10251 JP 2001-153972 A JP 2000-287376 A

  Therefore, the present invention stores the power generated by the power generation unit, and varies the operation time or the like for the reception unit to receive the position information satellite according to the power exceeding a certain amount of power storage (hereinafter referred to as surplus power). It is an object of the present invention to provide a time adjustment device that acquires time information and corrects the time, a time measuring device with the time adjustment device, and a time adjustment method for the time adjustment device.

  According to the present invention, the subject is a receiving unit that receives a satellite signal transmitted from a position information satellite, a time generating unit that generates time information, and correction information that stores time correction information that corrects the time information. A storage unit; a correction information generation unit that generates the time correction information based on the satellite signal; and a power generation amount storage unit that stores a power generation amount from a power generation unit that generates power according to the environment of the reception unit as power generation information. Determining whether a power storage capacity of the power storage unit that stores the power generated by the power generation unit is stored as specified value information, and whether the power generation information is in an overcharged state exceeding the previous specified value information. And an overcharge determining unit that sets an operating time of the receiving unit.

According to the said structure, this time adjustment apparatus stores the electric power generation amount of a power generation part in a power generation information storage part as power generation information. Then, the storage capacity of the power storage unit that stores the power generated by the power generation unit is stored in the specified value information storage unit as specified value information. Then, the overcharge determination unit determines whether the power generation information is in an overcharge state exceeding the specified value information, and sets the operation time of the reception unit.
For this reason, according to this time adjustment device, the operation time of the receiving unit can be varied according to the power generation state of the power generating unit.

  Preferably, the reception unit is a time adjustment device having a configuration of receiving using the overcharge.

  According to the above configuration, when the power generation information exceeds the specified value information and is in an overcharged state, the reception unit generates power with the overcharge, that is, the power generation amount of the power generation unit exceeds the storage capacity. When the electric power is generated, the satellite signal of the position information satellite is received using the electric power generated beyond the electric power. For this reason, in this time adjustment device, when it is in an overcharged state, the power generation amount from the power generation unit exceeding this power storage capacity can be used effectively.

  Preferably, the reception unit includes a reception history storage unit that stores a reception history of the position information satellites received in the past, and a satellite selection unit that selects the position information satellites based on the reception history, The time receiving device is configured to receive the satellite signal from the position information satellite selected by the satellite selection unit.

According to the above configuration, the reception history storage unit stores the reception history of the position information satellite received by the reception unit. The receiving unit is configured to receive the position information satellite selected by the satellite selecting unit based on the reception history in the reception history storage unit.
Therefore, according to this time adjustment device, when the receiving unit receives a satellite signal from the position information satellite, the position information satellite is quickly selected based on the reception history, and the orbit of the position information satellite is calculated. Without receiving satellite signals.

  Preferably, the reception history stores reception history reference time information, reception date information, satellite number information of the position information satellite, and signal strength information of the satellite signal and the satellite signal. Further, at least one satellite-related information with Doppler frequency information is further accumulated, and the satellite selection unit has the same satellite number information and has a different reception date. Comparing at least two satellite-related information having information to determine whether or not the position information satellite is within the field-of-view range that can be received, the position information satellite that is within the field-of-view range is prioritized for reception The position information satellite that is higher in order and not in the field-of-view range has a field-of-view setting unit that sets the priority of reception to be lower, and at the reception timing of the receiver, the reception history A time adjustment device, characterized in that has a configuration for selecting the priority high the position information satellite corresponding to the received history reference time information close to the signal timing.

According to the above configuration, the reception history in the reception history storage unit stores reception history reference time information, reception date information, and satellite number information of the position information satellite. As the reception history, at least one satellite related information such as the signal strength of the satellite signal and the Doppler frequency information of the satellite signal is further accumulated.
Then, the in-view setting unit compares changes in at least two satellite-related information having the same satellite number information and different reception date information. Then, the in-view setting unit determines whether the position information satellite is in the view range. Further, the field-of-view setting unit sets a higher priority, assuming that the position information satellite with a small change in satellite-related information is within the field-of-view range that can be received. In addition, the in-view setting unit sets a low priority for position information satellites with large changes in satellite-related information, assuming that they are not in the view range.
Then, the satellite selection unit selects a position information satellite having a high priority set by the in-view setting unit corresponding to the reception history reference time information close to the reception timing at the reception timing of the reception unit.

Therefore, it is possible to predict which position information satellite is within the visual field range or out of the visual field range from the satellite related information in the reception history and the change thereof. When the position information satellite is in the visual field range, the priority of the position information satellite is set high, and the position information satellite that is out of the visual field range is set low in priority. At the time of reception, among the reception history reference time information at the consultation timing, a position information satellite having a high priority corresponding to the near reception history reference time information is preferentially selected. At this time, the position information satellite having a low priority order is excluded from the selection targets of the satellite selection unit.
For this reason, according to this time adjustment device, even when the reception history is not continuous or when the amount of information in the reception history is small, reception establishment is improved, so that power is not wasted.

  Preferably, the reception history includes reception time information and reception day-of-week information, and it is determined whether the reception timing of the reception unit is an environment capable of receiving the position information satellite from the reception history. The time correction apparatus includes a reception timing determination unit that determines whether to perform reception.

According to the above configuration, the reception history includes reception time information and reception day information. The reception timing determination unit determines the reception timing of the reception unit from the reception history by determining whether the position information satellite can be received.
Therefore, according to this time adjustment device, the reception history is input with the date and time when the reception unit has been successfully received, so the time can be adjusted at a timing that matches the user's action history, which is convenient for the user. It is.

  Preferably, the satellite selection unit is configured to select the position information satellite that can be received from the reception history based on the time information and the circulation period information of the position information satellite. It is a time correction device.

  According to the above configuration, the satellite selection unit selects a position information satellite that can be received from the reception history based on the time information of the electronic timepiece and the orbiting period information of the position information satellite. For this reason, when the receiving unit receives a satellite signal from the position information satellite, the position information satellite can be selected efficiently. For this reason, according to this time adjustment device, it is possible to shorten the time until the reception of the satellite signal is started.

  Preferably, the satellite signal is a signal of a specific unit, except for the Z count information, week number information, UTC (World Coordinated Time) offset information, and the time related information, which are time related information of the position information satellite. And when the overcharge determining unit determines that the overcharge state is not in the overcharge state, the operation time is set as a time for receiving the Z count information, When the overcharge determining unit determines that the state is the overcharge state, the operation time is set as a time for receiving the time related information. It is.

According to the above configuration, when the overcharge determining unit determines that the overcharge state is not established, the overcharge determining unit sets an operation time for receiving the Z count information. When the overcharge determining unit determines that it is in an overcharged state, the overcharge determining unit determines an operation time for receiving time-related information including Z count information, week number information, and UTC (World Time Coordinated) offset information. It is supposed to be set.
Therefore, when it is determined that the battery is not overcharged, that is, when the power generation amount is less than or equal to the storage amount, the receiving unit receives only the Z count information from the time related information of the satellite signal from the position information satellite. It has become. For this reason, time information can be corrected with low power consumption. When it is determined that the battery is in an overcharged state, that is, when the power generation information exceeds the amount of electricity stored, power that exceeds the amount of electricity stored (also referred to as overcharge or surplus power) is generated. . In such a case, the receiving unit receives time-related information of the satellite signal from the position information satellite, and can correct the time information. And this receiving part operates by surplus power. For this reason, according to this time adjustment device, such surplus power can be used effectively. In addition to the Z count information, the time correction can be performed with higher accuracy by using week number information and UTC offset information.

  Preferably, the satellite time related information storage unit that acquires the week number information and the UTC offset information from the satellite signal and stores them as satellite time related information, and at the reception timing of the receiving unit, the satellite time related information is An effective period determination unit that determines whether the period is within the effective period, and when the overcharge state is present and the satellite time related information is within the effective period, the overcharge determination unit includes: The operation time of the receiving unit is set as a time during which the satellite signal from the position information satellite different from the position information satellite when the satellite time related information is acquired can be received. This is a characteristic time correction device.

According to the configuration, the valid period determining unit determines whether the satellite time related information in the satellite time related information storage unit is within the valid period at the reception timing of the receiving unit. When the valid period determining unit determines that the satellite related information is information within the valid period and the overcharge determining unit determines that the state is overcharged, the operating time of the receiving unit is the satellite time related information. It is set as a time during which a satellite signal from a position information satellite different from the position information satellite at the time of acquiring can be received.
Therefore, the reception history can be accumulated using overcharge, that is, surplus power.
Since the reception history is accumulated at the timing of the next time adjustment, the position information satellite can be easily selected at the next reception by using the accumulated reception history.

  According to the present invention, the subject is a receiving unit that receives a satellite signal transmitted from a position information satellite, a time generating unit that generates time information, and correction information that stores time correction information that corrects the time information. A storage unit; a correction information generation unit that generates the time correction information based on the satellite signal; and a power generation amount storage unit that stores a power generation amount from a power generation unit that generates power according to the environment of the reception unit as power generation information. Determining whether a power storage capacity of the power storage unit that stores the power generated by the power generation unit is stored as specified value information, and whether the power generation information is in an overcharged state exceeding the previous specified value information. And an overcharge determination unit that sets an operating time of the receiving unit. This is achieved by a time measuring device with a time adjusting device.

  Further, according to the present invention, the problem is that the power generation amount of the power generation unit of the time adjustment device is stored in the power generation information storage unit as power generation information, and the capacity of the power storage unit of the time correction device is specified as specified value information. A step of storing in the value information storage unit, an overcharge determination step of determining whether the power generation information is in an overcharged state exceeding the specified value information and setting the operating time of the receiving unit, and a time correction device A receiving step of receiving a satellite signal transmitted from the position information satellite, and a time correction information generating unit of the time adjusting device for correcting the time information of the time correcting information generating unit based on the satellite signal And a correction information generating step for generating the time information. This is achieved by a time correction method of a time correction device.

It is the schematic which shows the wristwatch with a GPS time correction apparatus which is the electronic device which concerns on this invention, for example. It is the schematic which shows the main hardware constitutions etc. inside the wristwatch with a GPS time correction apparatus. It is a functional block diagram for demonstrating the inside of the wristwatch with a GPS time correction apparatus. It is a functional block diagram for preventing overcharging of the power generation part of a wristwatch with a GPS time correction device. It is a schematic whole figure showing main software composition etc. of a wristwatch with a GPS time correction device. It is the schematic which shows the various programs of the various program storage part of FIG. It is the schematic which shows the various data of the 1st various data storage part of FIG. It is the schematic which shows the various data of the 2nd various data storage part of FIG. It is a schematic flowchart which shows operation | movement of the wristwatch with GPS of 1st Embodiment. It is a schematic flowchart of the overcharge detection program of an overcharge determination part. It is a schematic flowchart which shows operation | movement of the wristwatch with GPS of 2nd Embodiment. It is a schematic flowchart which shows an example of a satellite selection part. It is a schematic flowchart which shows operation | movement of the wristwatch with GPS of 3rd Embodiment. It is a schematic flowchart which shows an example of the satellite selection part of the wristwatch with GPS which concerns on 4th Embodiment. It is a schematic flowchart which shows a part of operation | movement of the wristwatch with GPS which concerns on 5th Embodiment. It is a conceptual diagram which shows an example of the reception history of a reception history memory | storage part. It is a conceptual diagram which shows an example of the reception history of a reception history memory | storage part. It is the schematic which shows other embodiment of the various program storage parts of FIG. It is the schematic which shows other embodiment of the 1st various data storage part of FIG. It is the schematic which shows other embodiment of the 2nd various data storage part of FIG. It is the schematic which shows other embodiment of the various program storage parts of FIG. It is the schematic which shows other embodiment of the various program storage parts of FIG. It is the schematic which shows other embodiment of the 1st various data storage part of FIG. It is the schematic which shows other embodiment of the various program storage parts of FIG. It is the schematic which shows other embodiment of the 2nd various data storage part of FIG.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.
The embodiments described below are preferred specific examples of the present invention, and thus are technically preferable and various limitations are given. However, the scope of the present invention will be described in the following description, particularly in the invention. The present invention is not limited to these embodiments unless otherwise specified.

(First embodiment)
FIG. 1 is a schematic diagram showing a timepiece with a time adjustment device according to the present invention, for example, a wristwatch 10 with a GPS time adjustment device (hereinafter referred to as “GPS wristwatch”). FIG. 2 is a schematic diagram showing a main hardware configuration and the like inside the GPS wristwatch 10 of FIG.
As shown in FIG. 1, the GPS wristwatch 10 is formed with a dial 12, a time display unit 22 b on which hands 13 such as a second hand, a minute hand, and an hour hand are arranged, a display 14 on which various messages are displayed, and the like. Has been. The display 14 may be, for example, an LCD display panel, an LED, an analog display, or the like.

As shown in FIG. 1, the GPS wristwatch 10 has an antenna 23, which is a plurality of GPS satellites 15 a, 15 b, 15 c, orbiting around the earth in a predetermined orbit. It is configured to receive a signal from any one of 15d and the like.
The GPS satellite 15a and the like are an example of a position information satellite.

FIG. 2 is a schematic diagram showing the main hardware configuration and the like inside the GPS wristwatch 10. As shown in FIG. 2, the GPS wristwatch 10 includes a time display device 22, a GPS device 20, a power generation unit 21, and the like therein, and has a configuration that also functions as a computer.
That is, the GPS wristwatch 10 in the present embodiment is a so-called electronic timepiece.

Hereinafter, each configuration shown in FIG. 2 will be described.
As shown in FIG. 2, the GPS wristwatch 10 includes a bus 16 to which a CPU (Central Processing Unit) 17, a RAM (Random Access Memory) 18, a ROM (Read Only Memory) 19, and the like are connected. ing.
The bus 16 is also connected with, for example, a GPS device 20 that is a receiving unit that receives satellite signals from the GPS satellites 15a and the like. Specifically, the GPS device 20 includes an antenna 23, a filter (SAW) (not shown), RF, baseband, and the like.
That is, the GPS device 20 is configured to receive a satellite signal from the GPS satellite 15a and the like in FIG. Details of signals received from the GPS satellites 15a and the like will be described later.

The bus 16 is also connected to a time display device 22 having a time generation unit 22a, for example, a time generation unit that generates time information. The time display device 22 includes a time measuring unit 22a and a time display unit 22b. The time measuring unit 22a includes a real time clock (RTC), a crystal oscillation circuit with a temperature compensation circuit (TCXO), and the like.
In addition, a power storage unit 26 that can store power and serve as a power source is connected to the bus 16. And the electric power generation part 21 which is a solar cell for charging so that electric power is stored in this electrical storage part 26 is also connected.
For this reason, the power generated by the power generation unit 21 is supplied to the power storage unit 26.

Further, a display 14 shown in FIG.
As described above, the bus 16 has a function of connecting all devices and is an internal bus having an address and a data path. The RAM 18 processes a predetermined program and controls a ROM 19 and the like connected to the bus 16. The ROM 19 stores various programs and various information.

FIG. 5 is a schematic diagram showing a main software configuration of the GPS wristwatch 10, and FIG. 5 is an overall view.
As shown in FIG. 5, the GPS wristwatch 10 has a control unit 24, which controls various programs for controlling the GPS device 20, the time display device 22, the power generation unit 21, the power storage unit 26, and the like. It has various data. That is, the control unit 24 is configured to process various programs in the various program storage units 30, various data in the first various data storage units 40, and various data in the second various data storage units 50.
In FIG. 5, the various program storage unit 30, the first various data storage unit 40, and the second various data storage unit 50 are shown separately, but actually the data is stored separately in this way. However, they are shown separately for convenience of explanation.
The first various data storage unit 40 in FIG. 5 collectively shows data stored mainly in advance. The second various data storage unit 50 mainly shows data after the data in the first various data storage unit 40 is processed by various programs in the various program storage units 30.

Here, the GPS wristwatch 10 will be described with reference to FIG. FIG. 3 is a functional block diagram for explaining the inside of the GPS wristwatch 10 of FIG.
In the GPS wristwatch 10, a power generation amount detection unit 31a detects how much power is generated from the power generation unit 21. And the electric power which this electric power generation part 21 generated is sent as a drive current at the time of driving the control part 24. FIG.

The control unit 24 controls the overcharge determination unit 300a, the time information correction unit 35a, and the like. The overcharge determination unit 300a includes a surplus power detection unit 32a and a reception operation time setting unit 33a. The overcharge determination unit 300a controls the satellite signal reception unit 20a. The satellite signal receiving unit 20a is a part constituting the GPS device 20 (see FIG. 2).
The satellite signal receiving unit 20a receives a satellite signal from the received GPS satellite 15a or the like (see FIG. 1). Since the time correction information data 55a (see FIG. 8) is obtained from the received satellite signal, the time correction information data 55a (see FIG. 8) is stored in the time correction information storage unit 55. Then, the time information correction unit 35a in the control unit 24 corrects the time information generated by the time measuring unit 22a of the time display device 22 by using the time correction information data 55a (see FIG. 8) of the time correction information storage unit 55. To do. That is, the time information data 43a (see FIG. 7) that is the time information generated by the time measuring unit 22a is corrected. The corrected time information data 43a (see FIG. 7) becomes the corrected display time data 57a, and the time measuring unit 22a displays the corrected corrected display time data 57a (see FIG. 8) on the time display unit 22b. .
This time information data 43a is stored in the time information storage unit 43 of FIG. 7, and is constantly updated data. The corrected display time data 57a is stored in the corrected display time storage unit 57 in FIG.
Here, the time correction information data 55a (see FIG. 8) is an example of time correction information. The time correction information storage unit 55 (see FIG. 8) is an example of a time correction information storage unit.
The GPS wristwatch 10 corrects the time as described above. Details will be described later.

  Next, FIG. 4 shows an extracted functional block diagram for preventing overcharging of the power generation section 21 of the GPS wristwatch 10. The amount of power generated by the power generation unit 21 is detected as a voltage value by the power generation amount detection unit 31a. The electric power generated from the power generation unit 21 once enters the overcharge prevention unit 25 as a generated current. Then, the surplus power detection unit 32a (see FIG. 3) of the control unit 24 described above compares the voltage value detected by the power generation amount detection unit 31a with the power storage capacity of the power storage unit 26, and further the power storage of the power storage unit 26. See if the quantity is storage capacity. And the surplus electric power detection part 32a (refer FIG. 3) sends a control signal to the overcharge prevention part 25 via the electric power generation amount detection part 31a, when detecting surplus electric power. Then, the overcharge prevention unit 25 causes the surplus power to flow to the control unit 24 as a surplus current.

Further, when the amount of stored electricity is not the storage capacity, the overcharge prevention unit 25 is configured to flow the generated current from the power generation unit 21 as a stored current to the power storage unit. And from the electrical storage part 26, the information of the voltage value corresponding to an electrical storage current enters into the electric power generation amount detection part 31a via the overcharge prevention part 25. FIG.
The power storage unit 26 provides a drive current to the control unit 24.
Therefore, when surplus power is generated, surplus current is provided as drive current to the control unit as surplus power. Using this surplus current, as will be described later, the GPS satellite 15a or the like (see FIG. 1). Are used when receiving satellite signals and the like. When no surplus current is generated, the drive current is provided from the power storage unit to the control unit 24 so that the GPS time of the satellite signal from the GPS satellite 15a or the like (see FIG. 1) can be received as will be described later. It has become.
Therefore, when surplus power is generated, it can be used effectively in this way.
The power generation amount detection unit 31a, the surplus power detection unit 32a, the reception operation time setting unit 33a, the time information correction unit 35a, and the like in FIGS. 3 and 4 are the programs in the various program storage units 30 in FIG. 5 (see FIG. 6). The above-described processing is performed using various data (see FIGS. 7 and 8) in the first various data storage unit 40 and the second various data storage unit 50 in FIG. It has become. This point will be described later.

6 to 8 are schematic diagrams showing the main software configuration of the GPS wristwatch 10. FIG. 6 is a schematic diagram showing various programs in the various program storage units 30 of FIG. FIG. 7 is a schematic diagram showing various data in the first various data storage unit 40 of FIG. FIG. 8 is a schematic diagram showing various data in the second various data storage unit 50 of FIG.
9 and 10 are schematic flowcharts showing main operations and the like of the GPS wristwatch 10 according to the first embodiment.

Hereinafter, the operations of the GPS wristwatch 10 according to the present embodiment will be described according to the flowcharts of FIGS. 9 and 10, and the various programs and data of FIGS. 6 to 8 and the above-described FIG. The correspondence relationship in FIG. 4 will be described.
First, the GPS wristwatch 10 in FIG. 1 is configured to correct the time of the time display device 22 (see FIGS. 2 and 3) at a specific time periodically, for example, at regular intervals. This time correction is performed by receiving a signal from the GPS satellite 15a orbiting around the earth.
For this reason. As shown in ST11 of FIG. 9, it is first determined whether or not a time correction time that is a predetermined time has come. Specifically, an internal counter (not shown) counts from the time when the previous time correction was performed, and determines whether or not the fixed time (reference time) information data 44a of the fixed time information storage unit 44 of FIG. Yes. If the predetermined measurement time is reached, the process proceeds to ST12 in FIG.
In ST12, the power generation amount of the power generation unit 21 (see FIGS. 3 and 4) is confirmed. That is, as described above with reference to FIGS. 3 and 4, the power generation amount detection unit 31 a detects how much power is generated from the solar battery that is the power generation unit 21. That is, the amount of power generated by the power generation unit 21 is detected as a voltage value by the power generation amount detection unit 31a. And it progresses to ST13 of FIG. 9, and it is judged whether the surplus electric power generation has arisen. A series of movements from ST12 to ST13 is as described above with reference to FIG. Here, a series of movements from ST12 to ST13 will be described in more detail with reference to FIG. 4 and FIG.

As described above, in order to confirm the current solar power generation amount in ST12 of FIG. 9, as shown in FIG. 4, the power generation amount from the power generation unit 21 is sent to the power generation amount detection unit 31a as a voltage value. 4, the power generation amount detection program 31 in FIG. 6 recognizes the power generation amount from the power generation unit 21 in FIG. 4 as a voltage value.
Then, the process proceeds to a schematic flowchart, which is a process for confirming the current solar power generation amount in FIG. 10, and proceeds to a step of detecting the power generation amount and the like.
In ST101 in FIG. 10, the power generation amount detection program 31 in FIG. 6 recognizes the power generated by the power generation unit 21 in FIG. 4 as a voltage value, and the power generation amount detection program 31 in FIG. The power generation amount information data 53 a is stored in the power generation amount information storage unit 53. Here, the power generation amount information data 53a in FIG. 8 is an example of power generation information. And the electric power generation amount information storage part 53 of FIG. 8 is an example of an electric power generation information storage part.

On the other hand, as described above with reference to FIG. 4, the power generated by the power generation unit 21 is once sent to the overcharge prevention unit 25 as a generated current. The generated current is sent to the power storage unit 26 through the overcharge prevention unit 25.
Then, the power storage unit 26 stores the power from the power generation unit 21. The power storage state of the power storage unit 26 is sent as a voltage value to the power generation amount detection unit 31a via the overcharge prevention unit 25.
The voltage value sent from the power storage unit 26 via the overcharge prevention unit 25 represents the state of power storage in the power storage unit 26, and as the power storage amount data 58a in FIG. Is remembered.
That is, in ST102 of FIG. 10, the amount of voltage sent from the electricity storage amount confirmation program 305 of FIG. 6 to the power generation amount detection unit 31a via the overcharge prevention unit 25 in accordance with the state of electricity storage of the electricity storage unit 26 of FIG. Is stored in the charged amount data storage unit 58 of FIG. 8 as charged amount data 58a.
8 is updated every time power is supplied from the power generation unit 21 of FIG. 4 or when the power of the power storage unit 26 of FIG. 4 is used. It has become.
Here, the storage amount data 58a in FIG. 8 is an example of storage information. And the electrical storage amount data storage part 58 of FIG. 8 is an example of an electrical storage information storage part.

Next, the process proceeds to ST103 in FIG. 10, and as described with reference to FIGS. 3 and 4, the surplus power detection unit 32a of the overcharge determination unit 300a in FIG. 3 determines whether or not surplus power is generated. To do.
That is, in the surplus power detection unit 32a in FIG. 3, the surplus power detection program 32 in FIG. 6 compares the power generation amount information data 53a in FIG. 8 with the specified value information data 41a in the specified value information storage unit 41 in FIG. 7 is a value obtained by converting the storage capacity of the power storage unit 26 (see FIGS. 2 and 4) of the GPS wristwatch 10 into a voltage value. Therefore, the surplus detection program 32 in FIG. 6 compares the power generation amount information data 53a in FIG. 8 with the specified value information data 41a in FIG. 7, and the power generation amount information data 53a in FIG. It is determined whether or not 41a or more. Further, the surplus power detection program 32 in FIG. 6 is configured to determine whether or not the charged amount data 58a in FIG. 8 satisfies the specified value information data 41a in FIG.
Here, the specified value information data 41a in FIG. 7 is an example of specified value information. The specified value information storage unit 41 in FIG. 7 is an example of a specified value storage unit.

If it is determined in ST103 of FIG. 10 that there is no surplus power, the process proceeds to ST104.
Then, as described above with reference to FIG. 4, the case where it is determined that there is no surplus power is the case where the amount of power stored in power storage unit 26 in FIG. The prevention unit 25 causes the power generation current from the power generation unit 21 in FIG. 4 to flow as a power storage current to the power storage unit.
Then, the process proceeds to ST105 in FIG. 10, and the power storage unit 26 in FIG. 4 provides a drive current to the control unit 24.

In this case, since there is no surplus power generation amount in ST13 of FIG. 9, when returning to FIG. 9, the process proceeds to ST15.
Here, before explaining ST15, an outline of satellite signals from the GPS satellite 15a and the like will be explained.
The satellite signals from the GPS satellites 15a, etc. include ephemeris information relating to the orbits of each GPS satellite itself, such as satellite correction data including information indicating the state of the GPS satellite itself that is transmitting the signal, orbit information of all GPS satellites. Other satellite simple data including almanac information related to is included. The navigation message information is composed of these as a whole.

The other satellite simple data is divided into 1 to 25 pages. The contents of different pages for each frame are transmitted in order.
A signal is transmitted from the GPS satellite 15a or the like in units of one frame (30 seconds). This one frame has five subframes (one subframe is 6 seconds). Each subframe has 10 words (1 word is 0.6 seconds). Accordingly, it takes about 12.5 minutes to receive all the navigation message information.
The first two words (two words) at the top of each subframe are a TLM (Telemetry word) word and a HOW (handover) word. This includes HOW (handover) data and Z-Count. This Z-Count (Z count) is data corresponding to a time code (what hour, minute, and second).

TLM data is stored in the TLM word, and preamble data is stored at the head of the TLM word.
The word following the TLM is a HOW word in which HOW data is stored, and GPS time information of a GPS satellite called Z-Count (also referred to as TOW (Time of Week) count) is stored at the head thereof. The GPS time is managed in units of one week. Accordingly, the elapsed time from 0:00 on every Sunday is displayed in units of 1.5 seconds, and returns to 0 at 0:00 on the next Sunday. The week number of GPS is assigned for this one week. For this reason, the receiving side is configured to acquire the GPS time by acquiring the data of the week number and the elapsed time (seconds). The starting point of this GPS time is UTC (at the time of global agreement). Then, when the Z-Count is received, decoded, and calculated, the GPS time can be known.

The first subframe 1 of the navigation message information includes week number data. In this week number data, the starting point of GPS time is UTC, January 6, 1980, 00:00:00, and the week starting on this day is week number 0. Further, the page 18 of the subframe 4 stores UTC offset data as a parameter indicating the relationship between GPS time and UTC. This UTC offset data is a conversion parameter representing the relationship between GPS time and UTC. Therefore, UTC and Japan Standard Time can be obtained by using this UTC offset data.
The week number data is updated on a weekly basis, and the UTC offset data is updated on a semi-annual basis. The effective period is long and does not need to be received every time. Therefore, if the week number data or UTC offset data is within the effective period when the update time has not arrived since the last acquisition, the time correction can be performed if the time information can be obtained from the Z count without acquisition. Is possible. When the time correction is performed, if the week number data or the UTC offset data is updated, the data can be used to correct the time with high accuracy.
Further, in order to acquire such frame data of the GPS satellite 15a and the like, it is necessary for the receiving side to synchronize with the signal of the GPS satellite 15a and the like. A positioning code and code are transmitted from the GPS satellite 15a and the like at an accurate timing. In particular, for example, a C / A code (1023 chip (1 ms)) is used for synchronization in units of 1 ms. Then, a C / A code pattern is generated on the receiving side, and the timing is adjusted (code synchronization). The C / A code (pseudo noise code) is assigned a different code pattern for each GPS satellite 15a or the like. Therefore, the GPS satellite 15a and the like can be identified and received by this code.

The signal from the GPS satellite 15a etc. is transmitted as described above.
Therefore, in this embodiment, when only Z-Count is acquired, it is synchronized with the C / A code from the GPS satellite 15a and the like, and the time to be synchronized with the TLM word preamble and the HOW word TOW is set. Can get.
Also, when acquiring Z-Count, week number data, and UTC offset data, it is synchronized with the C / A code, synchronized with the preamble of the TLM word and the TOW of the HOW word, and page 18 of subframe 1 and subframe 4. Can be acquired by setting the time that can be acquired. Alternatively, when acquiring the Z-Count, week number data, and UTC offset data, the time for acquiring all the navigation messages is set, and the Z-Count, week number data, UTC offset is acquired from the acquired message. Data can also be generated and acquired.
Here, when acquiring only Z-Count as described above, or when acquiring Z-Count, week number data, and UTC offset data, it is determined which GPS satellite 15a or the like has been received at the previous reception. the side, has become known, in a state of being fixed should receive an advance which GPS satellites 15a and the like. Therefore, for example, a code for receiving a satellite signal such as the GPS satellite 15a at the previous reception is set on the GPS device 20 (see FIG. 2) side.
In ST14, ST15, and ST16, which will be described later, as described above, the satellite time information is acquired by setting.

Then, in ST15, the reception operation time setting program 33 in FIG. 6 causes the satellite signal reception unit 20a of the GPS device 20 in FIG. Z-Count) is set as the reception time. Then, this set time is stored as reception operation time setting information data 52a in the reception operation time information storage unit 52 of FIG.
That is, the reception operation time setting program 33 in FIG. 6 sets an operation time for receiving only Z-Count, and stores it in the reception operation time information storage unit 52 as reception operation time setting information data 52a in FIG. ing.
Therefore, when correcting the time information data 43a of FIG. 7 of the time measuring unit 22a of the time display device 22 of FIG. 3, the shortest time is set. Therefore, the power consumption is low, and it can be efficiently completed in a short time.

On the other hand, if it is determined in ST103 in FIG. 10 that there is surplus power, the process proceeds to ST108. Then, as described above with reference to FIG. 4, when surplus power is generated, this surplus power is used as surplus current, and is provided to the control unit 24 as drive current via the overcharge prevention unit 25 in FIG. 4.
In this case, since it is determined in ST13 of FIG. 9 that there is a surplus power generation amount, when returning to FIG. 9, the process proceeds to ST14.
In ST14 of FIG. 9, the reception operation time setting program 33 of FIG. 6 is updated by the satellite signal receiver 20a of FIG. 3 of the GPS device 20 (see FIG. 2), and the satellite signals of the GPS satellites 15a and the like (see FIG. 1) To receive time for receiving Z-Count, week number data, and UTC offset data as satellite time information.
Then, this set time is stored as reception operation time setting information data 52a in the reception operation time information storage unit 52 of FIG.
That is, when this surplus power is detected, the reception operation time setting program 33 sets the operation time for receiving the Z-Count, the week number data, and the UTC offset data, and the reception operation time is set as the reception operation time setting information data 52a. The information is stored in the information storage unit 52.
Therefore, when the time information data 43a of FIG. 7 which is the time information of the time measuring unit 22a of the time display device 22 of FIG. 3 is corrected, the surplus power can be used.

  As described above, the operation time of the GPS device 20 (see FIG. 2), which is a receiving unit, can be adjusted and set according to the presence or absence of surplus power. When there is surplus power, it can be set long, and when there is no surplus power, it can be set short.

Next, proceeding to ST16 in FIG. 9, the GPS device 20 (see FIG. 2) starts receiving satellite signals from the GPS satellites 15a and the like (see FIG. 1). That is, in the above-described ST14 and ST15, the GPS device 20 (see FIG. 2) performs reception for the set operation time depending on the presence or absence of surplus power.
That is, the GPS device 20 (see FIG. 2) performs a reception operation for the reception operation time setting information data 52a of FIG.

  Then, the process proceeds to ST17 in FIG. 9, and the correction time information generation program 34 in FIG. 6 includes the week number data, UTC among the satellite time information (Z-Count, week number data, UTC offset data) of the received satellite signal. The offset data is stored in the satellite time related information storage unit 51 as the satellite time related information data 51a of FIG. Then, the correction time information generation program 34 of FIG. 6 stores Z-Count in the time correction information storage unit 55 as the time correction information data 55a of FIG. Therefore, satellite time information for time correction is acquired from the satellite signal transmitted from the GPS satellite 15a or the like (see FIG. 1). Here, the correction time information generation program 34 of FIG. 6 is an example of a correction information generation unit that generates time correction information based on a satellite signal.

Then, the process proceeds to ST18 in FIG. 9, and when the time corresponding to the reception operation time setting information data 52a in FIG. 8 has elapsed, the GPS device 20 (see FIG. 2) stops and the GPS reception ends.
Next, the process proceeds to ST19 in FIG. 9, and the time display unit 22b (see FIG. 3) of the GPS wristwatch 10 (see FIG. 1) is corrected based on the satellite time information acquired in ST17. That is, the time information correction program 35 of FIG. 6 uses the time correction information data 55a of FIG. 8 to correct the time information data 43a of FIG. 7 which is the time information of the time measuring unit 22a (see FIG. 3). The corrected display time data 57a is stored in the corrected display time storage unit 57. Then, based on the corrected display time data 57a of FIG. 8, the time information data 43a of FIG. 7 which is the time information of the time measuring unit 22a (see FIG. 3) is corrected, and the time of the time display unit 22b (see FIG. 3) is corrected. Is fixed.
And this flow is once complete | finished. Here, the time information data 43a in FIG. 7 is an example of time information generated by the time measuring unit 22a in FIG. 3 which is an example of the time generating unit.

Here, the timing of the next time correction can be obtained from the corrected display time data 57a of FIG. 8 and the time information data 43a of FIG. 7 which is the time information of the time measuring unit 22a of FIG. That is, in the case where the time is corrected when a certain time has elapsed, the data of the current time display unit 22b (see FIG. 3) from the corrected display time data 57a of FIG. 8 when the time is corrected. 7 time information data 43a may be compared so that it can be determined whether a certain time has elapsed.
Therefore, when the GPS device 20 (see FIG. 2) as the receiving unit receives a signal from the GPS satellite 15a or the like (see FIG. 1) as an example of the position information satellite, the overcharge determining unit 300a in FIG. The surplus power detection program 32 (see FIG. 6) of the surplus power detection unit 32a in FIG. 3 determines whether the power generated by the power generation unit 21 in FIG. 3 is in an overcharged state exceeding the power storage capacity of the power storage unit 26 in FIG. ) Then, the operation time of the GPS device 20 of FIG. 2 as an example of the reception unit is set by the reception operation time setting program 33 (see FIG. 6) of the reception operation time setting unit 33a.
For this reason, the operation time of the GPS device 20 of FIG. 2 as a receiving unit can be varied according to the power generation state of the power generation unit 21 of FIG.

Then, in the GPS device 20 (see FIG. 2) as an example of the receiving unit, the power generation amount information data 53a in FIG. 8 as an example of power generation information exceeds the specified value information data 41a in FIG. 7 as an example of specified value information. In the case of an overcharged state, the overcharge, that is, if the amount of power generated by the power generation unit 21 (see FIGS. 3 and 4) exceeds the storage capacity, the power is generated. A satellite signal of a GPS satellite 15a (see FIG. 1), which is an example of a position information satellite, is received using the generated power.
As described above, in the first embodiment, when receiving a satellite signal or the like from the GPS satellite 15a or the like, it is possible to determine whether it is overcharged and set the operation time of the receiving unit. ing. When there is an overcharge state, that is, when there is surplus power, the surplus power can be used to receive a satellite signal. Therefore, when surplus power is generated, it can be used effectively.

(Second Embodiment)
Since the second embodiment has many configurations in common with the first embodiment, the same configurations are denoted by the same reference numerals, and different points will be mainly described. FIGS. 11 and 12 are schematic flowcharts according to the second embodiment. FIGS. 18 to 20 illustrate various programs in the various program storage units 130 and the first various data storage units 140 in the second embodiment. It is the schematic which shows the various data and the various data of the 2nd various data storage part 150. FIG.
The difference from the first embodiment is that there is no step of determining whether it is a fixed time, that is, a time correction time. In this connection, compared with the first embodiment, the various programs in the various program storage units 130, the various data in the first various data storage unit 140, the second data in the second embodiment in FIGS. The various data stored in the various data storage unit 150 are partly added or changed. The various programs in the various program storage units 130 of FIG. 18 of the second embodiment are the same as the various programs (see FIG. 6) of the various program storage units 30 of the first embodiment, the reception history recording program 36, the position information. A satellite selection program 37 and a satellite detection program 301 are added. Further, the various data in the first various data storage unit 140 of FIG. 19 is the fixed time (reference time) information storage unit 44 of the various data (see FIG. 7) of the first various data storage unit 40 of the first embodiment. Further, instead of the regular (reference time) information data 44a, a circulation cycle information storage unit 45 and a circulation cycle information 45a are stored. Furthermore, the various data in the second various data storage unit 150 in FIG. 20 are stored in the various data in the second various data storage unit 50 (see FIG. 8) in the first embodiment in the reception history information storage unit 54. The information data 54a and the reception satellite information data 56a of the reception satellite information storage unit 56 are added.

Then, in the schematic flowchart of FIG. 11, the current solar power generation amount is confirmed in ST12 without confirming whether it is a fixed time. Here, the process of ST12 is the same as that of the first embodiment. Next, the process proceeds to ST13 and it is determined whether there is surplus power. This process is also the same as in the first embodiment.
The second embodiment is different from the first embodiment in that a reception history described later is created and updated. That is, it has the reception history recording program 36 shown in FIG. 18, and the reception history information data 54a in the reception history information storage unit 54 shown in FIG. 20 is created and updated. Here, the GPS satellite 15a or the like normally circulates in a certain circulation cycle, for example, approximately 11 hours and 58 minutes. In addition, one day, which is a cycle of a person who uses the GPS wristwatch 10, is 24 hours. For this reason, even if the GPS satellite 15a and other satellite signals can be received and the GPS satellite 15a and other information are stored in the history, as the time elapses from the received time, Deviation may occur.
Therefore, in the present embodiment, the time when receiving the GPS satellite 15a or the like from the reference time is set as a reference (hereinafter referred to as the reference time) based on a certain arbitrary time (year, month, date, and time). Know by time. Then, the elapsed time is converted by a human cycle, and the time is determined from the reference time. Then, the current time information is converted by the cycle period, and a candidate such as a receivable GPS satellite 15a can be selected in accordance with the reference time and the deviation from the reference time. It is in. In other words, the GPS satellites 15a and the like are managed in a circular cycle.
And the reception history information data 54a of FIG. 20 of this embodiment is roughly as follows.

That is, first, the reception history information data 54a in FIG. 20 that is created and updated by the reception history recording program 36 in FIG. 18 will be described before the description of the schematic flowchart.
The reception history information data 54a in FIG. 20 is, for example, data as shown in FIG. 16, and includes data on a reference date, time, date, satellite number, signal strength (SNR), and Doppler frequency (KHz). doing.
The reference date and time in FIG. 16 are arbitrarily determined data. Here, the GPS device 20 (see FIG. 2) succeeds in receiving a satellite signal such as the GPS satellite 15a for the first time, and the satellite signal 20 is stored in the reception history information recording unit 54 of FIG. 20 as the reception history reference time information of the reception history information data 54a. Specifically, the reception history recording program 36 shown in FIG. 18 first receives a satellite signal from the GPS satellite 15a or the like and receives the time when the satellite signal can be received in the reception history information data 54a. The received history reference time information is stored in the received history information recording unit 54 of FIG.
Here, for example, in FIG. 16, the reference date is April 1, 2007, the reference time is, for example, 8:00, and the time is taken every 30 minutes. That is, the time of FIG. 16 which is the reception history information data 54a is the reference time. Then, 8:00 am on April 1, 2007 is the reference date time, and the reference date and time are an example of reception history reference time information.
The date in FIG. 16 is an example of reception date information. This reception date information is obtained by converting a time when a satellite signal from the GPS satellite 15a or the like is successfully received into a reception history reference time, and storing the date as reception date information. That is, the time at which the GPS satellite 15a or the like has been successfully received is temporarily converted to a time based on 8 am on April 1, 2007, for example. In other words, the elapsed time from 8:00 am on April 1, 2007 is converted to 24 hours, the time of the reference date is determined, and the date of successful reception is determined at that time. The reception history recording program 36 in FIG. 18 stores the reception history information of the reception history information data 54a in the reception history information recording unit 54 in FIG. Here, the reception date information is an example of reception date information.
Furthermore, the satellite number information of the reception history information data 54a in FIG. 20 is the satellite number of the GPS satellite 15a or the like (see FIG. 1) that has been successfully received.
Further, together with the satellite number, information such as the signal strength of the satellite signal from the GPS satellite 15a, the Doppler frequency, and the like is used as the signal strength information and Doppler frequency information of the reception history information data 54a, respectively, and the reception history information of FIG. It may be stored in the recording unit 54. These pieces of information are stored as reception history information data 54a in FIG. 20 by the reception history recording program 36 in FIG.

Here, the Doppler frequency is a frequency shift due to the Doppler effect of the radio signal, and is also referred to as a Doppler shift. The Doppler effect also appears in the carrier and code of the GPS satellite 15a and the like, and the largest frequency shift occurs in a carrier having a high frequency. The frequency shift due to the Doppler effect is positive when the GPS satellite 15a or the like is approaching the GPS device 20, that is, the observed frequency is higher than the original frequency, and is negative when moving away. The observed frequency is lower than the original frequency. The GPS satellites 15a and the like are high-altitude satellites whose orbital speed is about 3.85 km / s. Therefore, the maximum velocity when viewed from the ground is less than 1 km / s when the GPS satellite 15a and the like are horizontally applied. When the elevation angle is high, the slowest speed is obtained, and at the zenith or maximum elevation angle, the speed is zero. When the GPS device 20 observes the zenith GPS satellite 15a and the like, the relative velocity becomes 0 and the Doppler frequency (Doppler shift) becomes 0.
The signal intensity is the intensity of the radio wave transmitted from the GPS satellite 15a or the like, and is attenuated when passing through the ionosphere. Therefore, when the GPS satellite 15a or the like is level, that is, when the elevation angle is low, the attenuation of the signal intensity increases, so that the observation is relatively small. Conversely, when the GPS satellite 15a is at the zenith or maximum elevation angle, the signal intensity is Since the attenuation of is reduced, it is observed relatively large. This value is such that when a satellite signal from the GPS satellite 15a or the like is received, the signal strength can also be known.
The reception history information data 54a of the present embodiment is configured and stored as described above.
The following description will be made with reference to FIGS. 18 to 20 centering on the schematic flow of FIGS. 11 and 12, focusing on the differences from the first embodiment.

In ST13, unlike the first embodiment, when the surplus power detection program 32 cannot confirm the surplus power as described in the first embodiment, this flow ends (FIG. 6). FIG. 18).
In addition, here, the time is not adjusted every fixed time, but the time is adjusted when surplus power is generated, and the flow ends when there is no surplus power. . For this reason, when there is no surplus power, no extra power is used, so that a reduction in the stored power of the power storage unit 26 (see FIGS. 2 and 4) can be suppressed. Therefore, the power lasts longer. When there is surplus power, the GPS device 20 (see FIG. 2) operates to receive satellite signals. For this reason, surplus power can be used effectively, and the life of the power generation unit 21 (see FIG. 2 and the like) is not shortened by overcharging.

On the other hand, if it is determined in ST13 in FIG. 11 that there is surplus power, a reception satellite setting mode is entered in ST42.
That is, in ST42, the position information satellite selection program 37 in FIG. 18 is started, and the process enters the reception satellite setting flow in FIG. In this case, the position information satellite selection program 37 in FIG. 18 and the satellite detection program 301 in FIG. 18 are selected. Here, the position information satellite selection program 37 and the satellite detection program 301 are an example of a satellite selection unit.
Hereinafter, the satellite detection program 301 of FIG. 18 will be described with reference to the schematic flowchart of FIG.
When the position information satellite selection program 37 in FIG. 18 is started in ST42, the process proceeds to ST200 in FIG. In ST200, it is determined whether there is a reception history.
Specifically, in ST200, the position information satellite selection program 37 in FIG. 18 confirms whether or not the reception history information data 54a is stored in the reception history information storage unit 54 in FIG.

  Then, when the reception history information data 54a is not stored in the reception history information storage unit 54 of FIG. 20, the process proceeds to ST205, and a specified value satellite is selected and set. That is, when the specified value satellite is selected and set, the search is set in the order of the satellite numbers of the GPS satellites 15a and the like (see FIG. 1). Then, the satellite number order of the GPS satellites 15a and the like is stored as the received satellite information data 56a in the received satellite information storage unit 56 of FIG. Then, the position information satellite selection program 37 in FIG. 18 which is the reception satellite setting mode ends, and the process returns to ST16 in FIG.

On the other hand, in ST200 of FIG. 12, if the position information satellite selection program 37 of FIG. 18 determines that the reception history information data 54a is stored in the reception history information storage unit 54 of FIG. 20, the process proceeds to ST201.
In ST201, the satellite detection program 301 in FIG. 18 checks the time information of the time measuring unit 22a (see FIG. 3), which is an example of the time generating unit, in order to detect the current time. That is, the time information data 43a in the time information storage unit 43 in FIG. 19 is confirmed. The time information data 43a is converted into reception history reference time. Specifically, the satellite detection program 301 in FIG. 18 converts the time information data 43a in FIG. 19 into the reception history information data 54a in FIG. 20 based on the circulation period information 45a stored in the circulation period information storage unit 45 in FIG. Is converted to be the reception history reference time information.
That is, the orbital period information 45a stores the orbital period of the GPS satellite 15a or the like (see FIG. 1), and is, for example, about 11 hours and 58 minutes. Then, the satellite detection program 301 in FIG. 18 subtracts a multiple of the circulation period information 45a (for example, 11 hours and 58 minutes) in FIG. 19 from the time information data 43a in FIG. 19 that is the current time. Then, the time information data 43a in FIG. 19 is converted into reception history reference time information which is one of the reception history information data 54a in FIG. Then, in ST203, which is the next step, the corresponding GPS satellite 15a and the like can be determined.
In other words, as described above, the GPS satellite 15a or the like normally orbits in a certain cycle, and the orbital cycle is, for example, about 11 hours 58 minutes (the orbital cycle information 45a in FIG. 19). Yes. Accordingly, the current time of the GPS wristwatch 10 (the time information data 43a in FIG. 19) is confirmed, and the current time and the reference date / time are, for example, from April 1, 2007 to 8:00 am Subtract a multiple of the lap period. Then, the time information corresponding to the reception history reference time information of the GPS satellite 15a and the like described above can be converted from the remainder obtained by subtracting the multiple of the orbital period from 8:00 am on April 1, 2007. It has become.
Here, the details of each piece of information in the reception history information data 54a in FIG. 20 are, for example, data as shown in FIG. 16, as described above.
Then, the process proceeds to ST203, and the corresponding GPS satellite 15a is allocated. That is, it is determined whether there is a reception satellite candidate in the reception history information data 54a of FIG. Specifically, the satellite detection program 301 determines whether there is a GPS satellite 15a or the like that can be a target from the time information converted from the time information data 43a and the reception history reference time information of the corresponding reception history information data 54a. to decide.

When the satellite detection program 301 in FIG. 18 determines that there is no GPS satellite 15a or the like that can be the target in ST203, the process proceeds to ST205 described above.
On the other hand, if the satellite detection program 301 in FIG. 18 determines that there is a GPS satellite 15a or the like that can be the target in ST203, the process proceeds to ST204. Then, candidate satellites are selected and set. That is, in ST204, the GPS satellite 15a or the like determined to be a target is stored as received satellite information data 56a in the received satellite information storage unit 56 of FIG.
When the GPS satellite 15a or the like is set, the received satellite information data 56a is stored in the received satellite information storage unit 56 of FIG. Then, the position information satellite selection program 37 and the satellite detection program 301 which are reception satellite setting modes are terminated.

  Returning to ST16 in FIG. 11, reception of satellite signals such as GPS satellites 15a stored as received satellite information data 56a in the received satellite information storage unit 56 in FIG. 20 is started. This process is the same as that in the first embodiment.

Next, the process proceeds to ST17, and time information is acquired from the obtained satellite signal.
That is, the time information here is the satellite time information (Z-Count, week number data, UTC offset data) in the first embodiment described above. In the second embodiment, when surplus power is generated, a time for receiving a satellite signal from the GPS satellite 15a or the like is set. That is, in the first embodiment, when surplus power is generated, the time for acquiring the satellite time information (Z-Count, week number data, UTC offset data) is set. You may set as time to receive all satellite signals, such as GPS satellite 15a.

  Then, from the received satellite signal, the correction time information generation program 34 of FIG. 18 first acquires satellite time information (Z-Count, week number data, UTC offset data) from the received satellite signal. Next, the correction time information generation program 34 in FIG. 18 sets the week number and UTC offset as the satellite time related information data 51a in FIG. 20 among the satellite time information (Z-Count, week number data, UTC offset data). This is stored in the satellite time related information storage unit 51. Then, the correction time information generation program 34 of FIG. 18 stores Z-Count in the time correction information storage unit 55 as the time correction information data 55a of FIG. Accordingly, satellite time information for time correction is acquired from the satellite signal transmitted from the GPS satellite 15a or the like. Here, the correction time information generation program 34 of FIG. 18 is an example of a correction information generation unit that generates time correction information based on a satellite signal.

  Then, the process proceeds to ST18, and when the time corresponding to the reception operation time setting information data 52a in FIG. 20 has elapsed, the GPS device 20 stops and GPS reception ends.

Next, in ST100, a reception history record is created or updated.
That is, the reception history recording program 36 in FIG. 18 records the received history of the GPS satellites 15a and the like in the reception history information recording unit 54 as the reception history information data 54a in FIG.
For example, the reception history information data 54a as shown in FIG. 16 described above is created. In the reception history information data 54a, reception history reference time information, reception date information, satellite number information of the position information satellite, signal strength information of the satellite signal, Doppler frequency information of the satellite signal, and the like are recorded. It has come to be. This point is as described above and is different from the first embodiment.

Next, time adjustment is performed at ST19. This step is the same as in the first embodiment.
In this way, the GPS wristwatch 10 (see FIG. 1 and the like) according to the second embodiment performs time correction.

That is, in the second embodiment, the GPS device 20 (see FIG. 2), which is an example of a receiving unit, receives an example of the reception history of the GPS satellite 15a (see FIG. 1), which is an example of a position information satellite received in the past. 20, which is an example of a reception history storage unit that stores the reception history information data 54 a of FIG. 20.
Then, the position information satellite selection program 37 in FIG. 18, which is an example of a satellite selection unit, selects the GPS satellite 15a and the like based on the reception history information data 54a in FIG.
Further, the position information satellite selection program 37 and the satellite detection program 301 in FIG. 18 are used by a time measuring unit 22a (see FIG. 3) that is an example of a time generation unit that generates the time information data 43a in FIG. 19 that is an example of time information. Based on the time information data 43a and the circular period information 45a of FIG. 19 such as the GPS satellite 15a, the GPS satellite 15a that can be received is selected from the reception history information data 54a of FIG.

The reception of the GPS satellite 15a or the like selected in this way can be executed when it is determined by the overcharge determination unit 300a (see FIG. 3) that there is surplus power.
Therefore, when the GPS device 20 (see FIG. 2) receives a satellite signal from the GPS satellite 15a or the like, the GPS wristwatch 10 (see FIG. 1 or the like) is based on the reception history information data 54a in FIG. The GPS satellite 15a and the like are selected quickly. Therefore, the GPS wristwatch 10 can receive satellite signals without calculating the orbit of the GPS satellite 15a or the like.
In addition, the satellite detection program 301 of FIG. 18 as the position information satellite selection program 37 of FIG. Based on the period information 45a (see FIG. 19), a GPS satellite 15a that can be received is selected from the reception history information data 54a in FIG. For this reason, when the receiving unit receives a satellite signal from the position information satellite, the position information satellite can be selected efficiently. For this reason, this GPS wristwatch 10 can shorten the time required to start receiving satellite signals.

Further, even when the reception history information data 54a of FIG. 20 is not yet created, the power when the GPS device 20 receives a satellite signal from the GPS satellite 15a or the like is in an overcharged state, that is, This is done by surplus power from the power generation unit. Therefore, surplus power can be used effectively. And when there is no surplus electric power, since reception is not performed, the consumption of the electric power of the electrical storage part 26 (refer FIG. 4) is suppressed.
However, for example, reception history reference time information that is time data at the time of successful reception first is stored in advance in the reception history information data 54a of FIG. 20, and the cyclic period information 45a is stored in the reception history reference time information. Time information data obtained by adding multiples may be created and stored for each satellite number such as the GPS satellite 15a.
For example, No. 1 in FIG. 16 is stored as a time when a satellite signal such as the GPS satellite 15a with the satellite number 7 is received at 8:00 on April 1, and the time and date are used as a reference. Then, a multiple of the circulation cycle information 45a is added. That is, the satellite number 7 can be received at 7:56 on April 2 of the following day, in which the lap period is 11 hours and 58 minutes and the double of these is added. Then, 7:56 on April 2 is stored as reception history information data 54a in FIG. Then, at the start of reception of the GPS satellite 15a, etc., the time information data 43a of FIG. 19 which is the current time information is confirmed, and the corresponding time and date are extracted from the reception history information data 54a of FIG. A candidate satellite may be set.

(Third embodiment)
In the third embodiment, many of the configurations are the same as those in the first embodiment and the second embodiment. Therefore, the common configurations are denoted by the same reference numerals and different configurations will be mainly described.
FIG. 13 is a schematic flowchart for explaining the third embodiment. FIG. 21 is a schematic diagram showing various programs in various program storage units 230 according to the third embodiment. The 1st various data storage part 40 which concerns on 3rd Embodiment overlaps with 1st Embodiment. Further, the second various data storage unit 150 according to the third embodiment is common to the second embodiment. Therefore, the first various data storage unit 40 and the second various data storage unit 150 of the third embodiment will be described with reference to FIGS. 7 and 20.
As shown in FIG. 13, ST11 to ST13 and ST14 to ST19 are the same as those in the first embodiment, and thus the description thereof is omitted.
The difference is that in ST13, the overcharge determination unit 300a is overcharged, that is, when there is surplus power, the process proceeds to ST14 in the first embodiment, but in ST3, the process proceeds to ST30. The point is to determine whether the week number and UTC offset are within the valid period.

That is, when it is determined in ST13 of FIG. 13 that there is surplus power, the process proceeds to ST30. Here, when the week number data and UTC offset data are acquired at the time of past time correction, the data has an expiration date as described above. That is, the week number data is updated every week, and the UTC offset data is updated every six months.
Therefore, when the period from the last acquisition has passed the valid period, it is not possible to correct the time accurately.
In addition, if it is within the valid period, it is not necessary to receive and update the same data again. In this case, other data can be added so that the data of the reception history information data 54a (see FIG. 20) can be added. It is set to receive signals from the GPS satellite 15a and the like. In this way, surplus power can be used effectively. If the reception history information data 54a can be added, the time until reception without searching the GPS satellites 15a and the like (see FIG. 1) can be performed when the reception history information data 54a is used in the next reception. Can be shortened.

Therefore, in the third embodiment, it is further confirmed in ST30 whether the week number data and the UTC offset data are within the valid period.
Specifically, the validity period determination program 304 in FIG. 21 determines whether the week number data and UTC offset data are valid.
That is, when the satellite signal from the GPS satellite 15a or the like (see FIG. 1) was previously received, the correction time information generation program 34 in FIG. 21 receives the satellite time information (Z-Count, week number data) of the received satellite signal. , UTC offset data), week number data and UTC offset data are stored in the satellite time related information storage unit 51 of FIG. 20 as the satellite time related information data 51a of FIG. Therefore, the effective period determination program 304 in FIG. 21 calculates data such as the date and time when the satellite time related information data 51a in FIG. 20 is stored with reference to the reception history information data 54a in FIG. 21 compares the time information data 43a of FIG. 7 with the data such as the date and time when the satellite time related information data 51a of FIG. 20 is stored, and determines whether or not it is in the effective period. To come to judge. Here, the effective period determination program 304 is an example of an effective period determination unit.

If it is determined in ST30 that it is within the valid period, the process proceeds to ST31 and, as described above, other GPS satellites 15a and the like (see FIG. 1) to add the reception history information data 54a of FIG. The time that can be received is set. At this time, a time is set such that all the GPS satellites 15a or the like orbiting the sky can be received in order. Specifically, the reception operation time setting program 33 in FIG. 21 receives, in order, all the GPS satellites 15a or the like that orbit the sky in the reception operation time setting information data 52a in the reception operation time information storage unit 52 in FIG. Set a time that you can.
Then, the process proceeds to ST32 and another satellite setting is performed. That is, specifically, the other satellite setting program 306 in FIG. 21 determines which satellite number the GPS satellite 15a (see FIG. 1) that acquired the previous week number data and UTC offset data has. Since it can be understood from the reception history information data 54a of FIG. 20, other satellite numbers such as GPS satellites 15a are set and stored in the reception satellite information storage unit 56 as reception satellite information data 56a of FIG. That is, the order of the satellite numbers of the GPS satellites 15a and the like (see FIG. 1) is set as the reception satellite information data 56a in FIG.

Then, the process proceeds to ST33, and the other satellite setting program 306 in FIG. 21 sequentially selects the GPS satellites 15a and the like (see FIG. 1) as the received satellite information data 56a in FIG.
Next, in ST34, the GPS device 20 (see FIG. 2) starts receiving the GPS satellite 15a and the like, and receives the satellite signal.
In ST35, the reception history storage program 36 in FIG. 21 additionally creates and updates reception history information data 54a in the reception history information storage unit 54 in FIG.
Next, in ST36, it is determined whether or not the reception of all satellites has been completed. If not, the process returns to ST33, the next GPS satellite 15a and the like (see FIG. 1) are set, and reception is started again. To do.
If it is determined in ST36 that the reception of all the satellites has been completed, the GPS reception is terminated in ST18, and the time information is corrected in ST19. This process is the same as in the first embodiment as described above. Therefore, explanation is omitted.

  Therefore, according to the GPS wristwatch 10 (see FIG. 1) of the third embodiment, the reception history information data 54a (see FIG. 20) can be accumulated using surplus power. The reception history information data 54a is accumulated at the next time correction timing. For this reason, if the received reception history information data 54a is used, the GPS satellite 15a can be easily selected at the next reception.

(Fourth embodiment)
Since the fourth embodiment has many configurations in common with the first embodiment and the second embodiment, the same configurations are denoted by the same reference numerals, and different configurations will be mainly described.
In the fourth embodiment, the flow of the second embodiment shown in FIG. 11 is largely the same as that of the second embodiment, and will be described with reference to FIG.
FIG. 22 is a schematic diagram showing various programs stored in the various program storage unit 130a. The difference between the various program storage units 130a in FIG. 22 and the various program storage units 30 in the first embodiment (see FIG. 6) is the same as in the second embodiment (see FIG. 18) in the reception history recording program 36. A position information satellite selection program 37, and a reception history change determination program 38 and a satellite selection priority determination program 39 to be described later.
FIG. 23 is a schematic diagram showing various data in the first various data storage unit 140a. The difference between the first various data storage unit 140a of FIG. 23 and the first various data storage unit 140 (see FIG. 7) of the first embodiment is that it has a fixed time (reference time) information storage unit 44. There is no point.
And since the 2nd various data storage part 150 is the same as that of 2nd Embodiment, the 2nd various data storage part 150 is demonstrated using FIG. 20 here.
Furthermore, in the first embodiment, it is first determined in ST11 (see FIG. 9) whether the time adjustment time is reached. In the fourth embodiment, the current solar power generation amount is determined in ST12 in FIG. The point is to confirm. That is, this point is the same as in the second embodiment described above, and the description thereof is omitted here.
And it progresses to ST13 of FIG. 11, and the presence or absence of surplus electric power is confirmed, Since this process is also the same as that of the above-mentioned 2nd Embodiment, description is abbreviate | omitted.
When it is determined in ST13 that there is surplus power, the reception satellite setting mode in ST42 of FIG. 11 is set. The reception satellite setting mode of ST42 is a step different from the second reception setting mode, and here is the step of the schematic flowchart of FIG.
Therefore, hereinafter, the fourth embodiment will be described with a focus on this point, using the schematic flowchart of FIG.

As shown in FIG. 14, the position information satellite selection program 37 of FIG. 22 is started, and the reception satellite setting flow of FIG. 14 is entered. In this case, the position information satellite selection program 37 in FIG. 22, the reception history change determination program 38 in FIG. 22, and the satellite selection priority determination program 39 in FIG. 22 are selected. The reception history change determination program 38 in FIG. 22 and the satellite selection priority determination program 39 in FIG. 22 are an example of a satellite selection unit and also an example of an in-field setting unit.
The fourth embodiment will be described below with reference to FIG.

When the position information satellite selection program 37 of FIG. 22 is started in ST42, the process proceeds to ST200 of FIG. In ST200, it is determined whether there is a reception history.
Specifically, in ST200, the position information satellite selection program 37 in FIG. 22 confirms whether or not the reception history information data 54a is stored in the reception history information storage unit 54 in FIG. 20, and the reception history information data 54a. If not, the process proceeds to ST205 and ends. And it returns to ST16 of FIG. Since this point has been described in the second embodiment, a description thereof will be omitted.

On the other hand, if the location information satellite selection program 37 in FIG. 22 determines that the reception history information data 54a is stored in the reception history information storage unit 54 in FIG. 20 in ST200, the process proceeds to ST301.
Here, as the reception history information data 54a of FIG. 20 of the fourth embodiment, data as shown in FIG. 16 similar to that described in the second embodiment is recorded. Since the description is as described above, the description is omitted.
In ST301, the reception history change determination program 38 of FIG. 22 confirms time information of a time measuring unit 22a (see FIG. 3) which is an example of a time generating unit in order to detect the current time. That is, the time information data 43a in the time information storage unit 43 in FIG. 23 is confirmed. Then, the reception history change determination program 38 in FIG. 22 searches the reception history information 54a in FIG. 20 for reception history data such as the GPS satellite 15a having reception reference time information close to the time information data 43a.

  The reception history change determination program 38 in FIG. 22 obtains at least reception history information data 54a having the same satellite number information and different reception date information from the reception history information data 54a in FIG. Extract two or more. At that time, the reception history change determination program 38 in FIG. 22 is preferably extracted from the reception history information data 54a (see FIG. 20) as close as possible to the current time information data 43a (see FIG. 23). Then, the reception history change determination program 38 acquires the signal strength information and Doppler frequency information. Then, the reception history change determination program 38 in FIG. 22 compares the signal strength information and the Doppler frequency information to obtain the change rate.

  Then, in ST304, the satellite selection priority determination program 39 in FIG. 22 determines the priority order based on the signal strength information and the Doppler frequency data change rate data obtained by comparison by the reception history change determination program 38 in FIG. For example, in the case of a GPS satellite 15a or the like (see FIG. 1) in which the signal intensity is small and the Doppler frequency is increasing (see FIG. 1), it is considered that the elevation angle is lowered, so that the possibility of disappearing from the field of view increases. Will be. Therefore, the satellite selection priority determination program 39 in FIG. 22 lowers the priority order of the satellite number data such as the GPS satellite 15a that may disappear from the field of view. On the contrary, the satellite number data such as the GPS satellite 15a approaching the zenith is set with a high priority.

Specifically, in FIG. 16, for example, it is assumed that the reception timing is around 9:00. For example, from FIG. 16 that is the reception information data 54a of FIG. Focus on reception histories 6 through 9. In this case, focusing on satellite number 2, the signal strength and Doppler frequency on April 5, April 7 and April 8, which have different dates, become smaller and the Doppler frequency increases. I understand that. The Doppler frequency is 0 when it is close to the zenith, and increases as it goes further away, that is, in the direction of lowering the elevation angle, and conversely, when it becomes closer, that is, when it goes in the direction of increasing the elevation angle. ,Decrease. And 0 is the starting point.
Therefore, here, it can be seen that the GPS satellite 15a of satellite number 2 (see FIG. 1) is in a direction out of the field of view.
In this way, the search order of the GPS satellites 15a and the like (see FIG. 1) is determined.

Next, proceeding to ST305, a GPS satellite 15a or the like (see FIG. 1) with a high priority is set and stored as received satellite information data 56a in the received satellite information storage unit 56 of FIG.
Then, the position information satellite selection program 37, the reception history change determination program 38, and the satellite selection priority determination program 39 in FIG.

  Then, returning to ST16, reception of satellite signals such as GPS satellites 15a stored as received satellite information data 56a in the received satellite information storage unit 56 of FIG. 20 is started. The following steps are the same as those in the first embodiment and the second embodiment described above, and will be omitted.

Therefore, from the satellite related information (signal intensity information, Doppler frequency information) of the reception history information data 54a in FIG. 20 and their changes, which GPS satellite 15a and the like (see FIG. 1) are in the visual field range, the visual field range. It is possible to predict whether it is off.
When the GPS satellite 15a or the like is in the visual field range, the priority is set high, and when the GPS satellite 15a is out of the visual field range, the priority is set low.
Upon reception, among the reception history reference time information at the timing of the consultation, the GPS satellite 15a having a high priority corresponding to the near reception history reference time information is preferentially selected. Then, the GPS satellites 15a and the like having a low priority are excluded from the selection targets of the position information satellite selection program 37 in FIG. For this reason, the reception establishment is improved even when the reception history information data 54a of FIG. 20 is not continuous or the amount of information is small. Therefore, useless power is not consumed.

(Fifth embodiment)
In the fifth embodiment, since many configurations are the same as those in the first embodiment, the common configurations are denoted by the same reference numerals, and different configurations will be mainly described.
Here, FIG. 15 shows a part of a schematic flowchart of the fifth embodiment. FIG. 24 shows various programs in the various program storage unit 30a of the fifth embodiment. The difference from the first embodiment is that a reception history program 36 and a reception timing determination program 302 are provided. FIG. 25 shows various data in the second various data storage unit 50a of the fifth embodiment. The difference from the first embodiment is that the reception history information data 504a in the reception history information storage unit 504 is different. It is in having. Here, the first various data storage unit 40 of the fifth embodiment is common to the first various data storage unit of the first embodiment, and will be described with reference to FIG.
Further, since the fifth embodiment largely overlaps with the schematic flowchart of the first embodiment shown in FIG. 9, the overlapping portion will be described with reference to FIG.
In the first embodiment, according to the schematic flowchart of FIG. 9, after determining whether it is time correction time in ST11, subsequently, the current solar power generation amount is confirmed in ST12. In this regard, in the fifth embodiment, before proceeding from ST11 to ST12, the process shown in the chart in the schematic flow of FIG. 15 is performed. That is, in the fifth embodiment, the steps ST11 and ST12 and subsequent steps in FIG. 9 are the same as those in the first embodiment and are as described in the first embodiment. The description is omitted.
Then, as shown in FIG. 15, following the step ST11, there is a difference in having steps ST400 to ST404. Therefore, hereinafter, the fifth embodiment will be described with a focus on this point, using the schematic flowchart of FIG.

As shown in FIG. 15, it is determined in ST11 whether it is time correction time. This step is the same as in the first embodiment described above.
Then, the process proceeds to ST400, where it is confirmed whether there is reception history information.
Specifically, the reception timing determination program 302 in FIG. 24 confirms whether the reception history information data 504a is stored in the reception history information storage unit 504 in FIG. If it is determined that there is no reception history data 504a, the process proceeds to ST12 and returns to the schematic flowchart of FIG. Since this point has been described in the first embodiment, a description thereof will be omitted.
The reception timing determination program 302 in FIG. 24 is also an example of a reception timing determination unit.
Hereinafter, the fifth embodiment will be described with reference to FIG.

On the other hand, in ST400, if reception timing determination program 302 in FIG. 24 determines that reception history information data 504a is stored in reception history information storage section 504 in FIG. 25, the process proceeds to ST401.
Here, as shown in FIG. 17, the reception history information data 504a (see FIG. 25) of the fifth embodiment includes reception time information data, reception date information data, and reception day information data. It is configured.
In addition, since the power generation unit 21 (see FIG. 2, FIG. 3, etc.) is solar power generation, data such as illuminance may be recorded.

  In ST401, the reception timing determination program 302 of FIG. 24 confirms time information of the time measuring unit 22a (see FIG. 3), which is an example of a time generation unit, in order to detect the current time. That is, the time information data 43a in the time information storage unit 43 in FIG. 7 is confirmed. Then, the reception timing determination program 302 in FIG. 24 confirms the current day of the week. The confirmation of the day of the week is, for example, the corrected display time data 57a of the corrected display time storage unit 57 of FIG. 25 and the current time information stored when the reception timing determination program 302 of FIG. From the time until the time information data 43a, it is determined how much (how many days and how many hours have passed), and the reception history information data 504a (in the previous correction display time storage unit 57 (see FIG. 25)) ( (See FIG. 25). Alternatively, if the GPS wristwatch 10 (see FIG. 1) has a day of the week display function, the day of week data is confirmed.

Next, proceeding to ST402, the corresponding data having the same time and day of the week is searched from the reception history.
Specifically, the reception timing determination program 302 in FIG. 24 uses the reception time information storage unit 504 in FIG. 25 to set the time and day of the week in the time information data 43a in FIG. The received history information data 504a is retrieved and extracted.

Next, the process proceeds to ST403, and in ST402, it is determined whether or not the corresponding data has been extracted. Specifically, in ST401, the reception timing determination program 302 in FIG. 24 has extracted the time and day of the week corresponding to the current time information data 43a (see FIG. 7) from the reception history information data 504a in FIG. Judging whether or not.
If the corresponding data cannot be extracted, the GPS satellite 15a or the like (see FIG. 1) is not likely to be received at the current time. That is, the GPS wristwatch 10 (see FIG. 1) is in a room or the like, and it is difficult for the GPS satellite 15a (see FIG. 1) or the like to be received. The reception history information data 504a in FIG. 25 stores the time, day of the week, and the like when reception was successful in the past. Therefore, the history of the reception history information data 504a (see FIGS. 25 and 17) is also an action history of the user of the GPS wristwatch 10 (see FIG. 1). That is, the state in which reception is successful is, for example, a case where the user is outdoors or the like, and a state in which satellite signals from the GPS satellites 15a and the like (see FIG. 1) are easily received. Therefore, the absence of data such as time and day of the week corresponding to the reception history information data 504a (see FIGS. 25 and 17) means that the GPS wristwatch 10 is currently received in an indoor environment (see FIG. 1). The environment is difficult to do.

  If the corresponding data cannot be extracted in ST403, it is determined that the reception environment is bad as described above, and the process proceeds to ST404. In ST404, the reception timing determination program 302 in FIG. 24 changes the reception timing. After that, the process returns to ST11 and it is determined whether or not the time correction time that is the changed reception timing has come.

  On the other hand, if the corresponding data can be extracted in ST403, the current environment is such that the GPS satellite 15a or the like (see FIG. 1) can be received. Therefore, the reception timing determination program 302 in FIG. It is determined that the timing is reached, and the process proceeds to ST12. ST12 detects the current power generation amount. Since this has been described in the first embodiment, a description thereof will be omitted. Then, the process proceeds to ST13 in the schematic flowchart of FIG. 9, and the steps ST14 to ST19 are performed. Then, after the time correction of ST19 in FIG. 9 is completed, in ST405, the reception history recording program 36 in FIG. 24 stores the reception history in the reception history information storage unit 504 in FIG. 25 as reception history information data 504a. It has become. The reception history recording program 36 in FIG. 24 may be executed after the GPS reception is completed.

In this way, the reception history information data 504a (see FIGS. 25 and 17) is provided, and the status of the GPS wristwatch 10 (see FIG. 1) can be predicted from the current time.
Therefore, according to the GPS wristwatch 10, the reception history information data 504a (see FIGS. 25 and 17) is input with the date and time when the GPS device 20 (see FIG. 2), which is a receiving unit, has successfully received. Therefore, the time can be adjusted at a timing that matches the action history of the user who is the user, which is convenient for the user.

  The present invention is not limited to the above-described embodiment. Furthermore, the above-described embodiments may be combined with each other. In each of the above-described embodiments, a GPS satellite is used as an example of the position information satellite. Alternatively, for example, a signal from a geostationary satellite or a quasi-zenith satellite may be received.

  DESCRIPTION OF SYMBOLS 10 ... Wristwatch with GPS time correction device, 12 ... Dial, 13 ... Hand, 14 ... Display, 15a, 15b, 15c ... GPS satellite, 16 ... Bus, 17 ... CPU, 18 ... RAM, 19 ... ROM, 20 ... GPS device, 20a ... satellite signal receiving unit, 21 ... power generation unit (solar cell), 22 ... time display device, 22a ... Timekeeping unit, 22b ... Time display unit, 24 ... Control unit, 31a ... Power generation amount detection unit, 32a ... Surplus power detection unit, 33a ... Reception operation time setting unit, 300a ... Overcharge determination unit, 35a ... Time information correction unit, 30 ... Various program storage units, 31 ... Power generation amount detection program, 32 ... Surplus power detection program, 33 ... Reception Operating time setting program, 34 ... When modified Information generation program 35 ... Time information correction program 36 ... Reception history recording program 37 ... Position information satellite selection program 38 ... Reception history change judgment program 39 ... Satellite selection priority judgment Program 301 301 Satellite detection program 302 Reception timing determination program 304 Valid period determination program 305 Storage amount confirmation program 306 Other satellite setting program 40 First various data storage units, 41 ... prescribed value information storage unit, 41a ... prescribed value information data, 43 ... time information storage unit, 43a ... time information data, 44 ... fixed time information Storage unit, 44a... Fixed time (reference time) information data, 45... Cycle period information storage unit, 45a... Cycle period information, 50. Data storage unit, 51 ... satellite time related information storage unit, 51a ... satellite time related information data, 52 ... reception operation time information storage unit, 52a ... reception operation time setting information data, 53 ... Power generation amount information storage unit, 53a ... Power generation amount information data, 54, 504 ... Reception history information storage unit, 54a, 504a ... Reception history information data, 55 ... Time correction information storage unit, 55a ... time correction information data, 56 ... received satellite information storage section, 56a ... received satellite information data, 57 ... corrected display time storage section, 57a ... corrected display time data, 58 ... Storage amount data storage unit, 58a... Storage amount data.

Claims (14)

A receiving unit for receiving a satellite signal transmitted from the position information satellite;
A time generation unit for generating time information;
A correction information storage unit for storing time correction information for correcting the time information;
A correction information generating unit that generates the time correction information based on the satellite signal;
A time information correction unit that corrects the time information based on the stored time correction information;
A specified value storage unit that stores specified value information based on the storage capacity of the power storage unit that stores the power generated by the power generation unit that generates power according to the environment of the receiving unit;
A power storage unit that determines whether or not power storage information that is a power storage state of the power storage unit satisfies the specified value information;
Based on the detection result of the detection unit, a setting unit for setting the operation time of the reception unit,
A time correction apparatus comprising: The time correction apparatus according to claim 1, wherein the time information is periodically corrected. The time information corrected by the time information correction unit is compared with the current time information, and when it is determined that a fixed time has elapsed from the corrected time information, the next time information is corrected. The time correction apparatus according to claim 1, wherein processing is performed. The time correction apparatus according to claim 1, wherein when the power storage information satisfies the specified value information, the receiving unit operates to receive the satellite signal.   The setting unit sets the operation time of the receiving unit longer when the power storage information satisfies the specified value information than when the power storage information does not satisfy the specified value information. The time correction device according to claim 1. A reception history storage unit for storing a reception history of the position information satellite received by the reception unit in the past;
A satellite selection unit that selects the position information satellite based on the reception history,
6. The time correction according to claim 1, wherein the reception unit is configured to receive the satellite signal from the position information satellite selected by the satellite selection unit. apparatus.   The time correction device according to claim 6, wherein the satellite selection unit selects the position information satellites in the order of satellite numbers when the reception history is not stored in the reception history storage unit. The reception history stores reception history reference time information, reception date information, and satellite number information of the position information satellite, and signal strength information of the satellite signal and Doppler frequency information of the satellite signal And at least one satellite related information is further accumulated and configured.
The satellite selection unit can receive the position information satellite by comparing at least two pieces of satellite related information having the same satellite number information and having different reception date information. The position information satellite that is in the visual field range is given a higher priority for reception, and the position information satellite that is not in the visual field range is given a lower priority for reception. A field-of-view setting unit to be set, and at the reception timing of the reception unit, the position information satellite with the highest priority corresponding to the reception history reference time information close to the reception timing is selected from the reception history The time correction apparatus according to claim 6, wherein the time correction apparatus is configured. The reception history includes reception time information and reception day information,
A reception timing determination unit that determines whether to perform reception based on the reception time information and the reception day information included in the reception history, and the time information and day of the reception of the reception unit; The time correction apparatus according to claim 6.   The satellite selection unit is configured to select the position information satellite that can be received from the reception history, based on the time information and the cycle information of the position information satellite. 6. The time correction apparatus according to 6. The satellite signal is a signal of a specific unit, and Z position information, week number information, UTC (World Time Coordinated) offset information, which is time related information of the position information satellite, and the position other than the time related information. Contains information satellite information,
When the detection unit determines that the power storage information does not satisfy the specified value information, the operation time is set as a time for receiving the Z count information,
When the detection unit determines that the power storage information satisfies the specified value information, the operation time is set as a time for receiving the time-related information. The time correction apparatus according to claim 1. A satellite time-related information storage unit for acquiring the week number information and the UTC offset information from the satellite signal and storing them as satellite time-related information;
An effective period determination unit that determines whether the satellite time related information is within an effective period at the reception timing of the receiving unit;
In a state where the detection unit has determined that said power storage information that meet the specified value information, if the satellite-time-related information is within the valid period, the setting unit, the operation time of the receiving section 12 is set as a time during which the satellite signal from the position information satellite different from the position information satellite when the satellite time related information is acquired can be received. The time correction device described. A receiving unit for receiving a satellite signal transmitted from the position information satellite;
A time generation unit for generating time information;
A correction information storage unit for storing time correction information for correcting the time information;
A correction information generating unit that generates the time correction information based on the satellite signal;
A time information correction unit for correcting the time information based on the stored correction time information;
A specified value storage unit that stores specified value information based on the storage capacity of the power storage unit that stores the power generated by the power generation unit that generates power according to the environment of the receiving unit;
A power storage unit that determines whether or not power storage information that is a power storage state of the power storage unit satisfies the specified value information;
Based on the detection result of the detection unit, a setting unit for setting the operation time of the reception unit,
A time measuring device with a time adjustment device, characterized by comprising: Storing prescribed value information based on the storage capacity of the electricity storage unit of the time adjustment device in the prescribed value information storage unit;
Determining whether power storage information that is a power storage state of the power storage unit satisfies the specified value information;
Setting the operating time of the receiver of the time adjustment device based on the result of the determination;
The receiving unit receives a satellite signal transmitted from a position information satellite; and
A correction information generating step of generating time information for correcting the time information of the time correction information generating unit based on the satellite signal, the time correction information generating unit of the time correction device;
A time information correction step of correcting the time information of the time correction device based on the generated time information;
A time correction method for a time correction device, comprising:

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