JP2016191603A - Analog electronic clock and control method of analog electronic clock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an analog electronic clock for lightening a burden imposed on a user relating to calibration for matching actual display contents of an analog display mechanism with the information.SOLUTION: An analog electronic clock includes: a plurality of analog display mechanisms for indicating one of a plurality of display positions each; first calibration means 31c for calibrating a first analog display mechanism in the plurality of analog display mechanisms on the basis of a detection result of a sensor for detecting a display position of the first analog display mechanism; and second calibration means 31d for calibrating a second analog display mechanism differing from the first analog display mechanism from among the plurality of analog display mechanism on the basis of information relating to a current display position of the second analog display mechanism.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an analog electronic timepiece having an analog display mechanism and an analog electronic timepiece control method.

  An analog electronic timepiece having an analog display mechanism for performing analog display is widely used in general. An analog electronic timepiece may not operate normally due to, for example, static electricity. In order to cope with such a case, the electronic timepiece has a function of restarting itself by a user operation.

  In Patent Document 1, in a radio wave type analog electronic timepiece, when the battery voltage drops below a predetermined voltage level, the pointer is stopped and the position of the pointer is stored in a non-volatile memory. It is disclosed to facilitate the setting.

International Publication No. 93/22712

  When the analog electronic timepiece is restarted (becomes all reset state), information on the display contents of the analog display mechanism stored in the RAM is lost, so that the actual display contents of the analog display mechanism and the information are matched. Calibration is required. When the user performs this calibration work himself, the calibration operation is troublesome. In order to facilitate calibration, it is conceivable to provide a mechanism for detecting the position of the hand. However, providing such a mechanism for all the hands and the like increases the cost and enlarges the timepiece.

  The present invention has been made in consideration of the above-mentioned circumstances, and one of its purposes is an analog that reduces a user's load related to calibration for matching the actual display contents of the analog display mechanism with the information. To provide an electronic watch.

  An analog electronic timepiece according to the invention includes a plurality of analog display mechanisms each indicating one of a plurality of display positions, and a first analog display mechanism among the plurality of analog display mechanisms. A first calibration unit that performs calibration based on a detection result of a sensor that detects a display position, and a second analog display mechanism that is different from the first analog display mechanism among the plurality of analog display mechanisms, And second calibration means for performing calibration based on information on the current display position of the second analog display mechanism.

  The analog electronic timepiece may further include a nonvolatile memory and storage control means for storing information on a current display position of the second analog display mechanism in the nonvolatile memory.

  In the analog electronic timepiece, the storage control means may store the changed display position in the nonvolatile memory when the second analog display mechanism changes the display position.

  In the analog electronic timepiece, when the display mode of the plurality of analog display mechanisms is a predetermined mode, the storage control means may be configured to be non-volatile even if the second analog display mechanism changes a display position. It is not necessary to store the changed display position in the memory.

  In the analog electronic timepiece, the storage control means may store information on the current display position of the second analog display mechanism in the nonvolatile memory at a predetermined time.

  In the analog electronic timepiece, the storage control unit stores information indicating a display mode of the analog display mechanism in the nonvolatile memory, and the second calibration unit indicates a display mode of the plurality of analog display mechanisms. Based on the information, the display position of the second analog display mechanism may be calculated.

  In the analog electronic timepiece, the second calibration means controls the at least some of the plurality of analog display mechanisms to indicate that the calibration cannot be performed when the information indicating the display mode indicates a predetermined mode. Good.

  The analog electronic timepiece further includes a receiving unit that receives radio waves including time information indicating date and time, and the second calibration unit calibrates the second analog display mechanism based on the time information. It's okay.

  The analog electronic timepiece further includes a voltage detection unit that detects a voltage of a secondary battery, and the second calibration unit calibrates the second analog display mechanism based on the detected voltage. Good.

  The analog electronic timepiece further includes a receiving unit that receives a satellite signal including time information from a satellite, and the sensor detects whether the first analog display mechanism indicates a specific position, and the analog electronic timepiece When the electronic timepiece is restarted, it instructs the receiver to start receiving satellite signals, and after the instruction, the first analog detection mechanism indicates the specific position to the first calibration means. It may further include a control unit that changes a display position until it is detected that the finger is pointed, and acquires a reception result from the receiving unit after the first analog display mechanism points to the specific position.

  According to the present invention, there is provided a control method for an analog electronic timepiece having a plurality of analog display mechanisms each indicating any one of a plurality of display positions. A step of performing calibration based on a detection result of a sensor for detecting a display position of the display mechanism, and a second analog display mechanism different from the first analog display mechanism among the plurality of analog display mechanisms. Performing calibration based on information relating to the current display position of the two analog display mechanisms.

  According to the analog electronic timepiece of the invention, it is possible to reduce a user's load related to calibration for matching the actual display contents of the analog display mechanism with the information.

It is a top view which shows an example of the external appearance of the satellite radio-controlled wristwatch concerning the embodiment of the present invention. It is a block diagram showing the internal configuration of a satellite radio-controlled wristwatch according to an embodiment of the present invention. It is a figure explaining the characteristic of the pointer and date plate in the satellite radio-controlled wristwatch shown in FIG. It is a functional block diagram which shows the function which the satellite radio-controlled wristwatch concerning embodiment of this invention implement | achieves. It is a figure which shows an example of the data stored in a non-volatile memory. It is a flowchart which shows the outline | summary of the process of the microcontroller at the time of restart. It is a flowchart explaining an example of the process by a functional hand position determination part. It is a flowchart explaining an example of the process by a functional hand position determination part. It is a flowchart explaining the process of the time display control part when a date changes, and a backup control part. It is a flowchart explaining the process of the mode control part at the time of switching a display mode, and a backup control part. It is a top view which shows another example of the external appearance of the satellite radio-controlled wristwatch concerning the embodiment of the present invention. It is a figure explaining the characteristic of the pointer and date plate in the satellite radio-controlled wristwatch shown in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Hereinafter, a satellite radio wave wristwatch will be described as an example of an analog electronic timepiece having an analog display mechanism. The satellite radio-controlled wristwatch 1 according to the present embodiment has a plurality of analog display mechanisms, receives radio waves including time information, and uses the time information included in the received radio waves to indicate the time measured by itself. Make corrections.

  FIG. 1 is a plan view showing an example of the appearance of a satellite radio-controlled wristwatch 1 according to the present embodiment, and FIG. 2 is a block diagram showing the internal configuration of the satellite radio-controlled wristwatch 1. As shown in these drawings, the satellite radio-controlled wristwatch 1 includes an antenna 10, a receiving circuit 20, a control circuit 30, a power generation circuit 41, a secondary battery 42, a power supply voltage detection circuit 43, and a drive mechanism 50. And a time display unit 51, a pointer 52, a dial plate 53, a hand position detection unit 55, and an operation unit 60.

  The antenna 10 receives a satellite signal transmitted from a satellite as a radio wave including time information. In particular, in the present embodiment, the antenna 10 is a patch antenna that receives a radio wave having a frequency of about 1.6 GHz transmitted from a GPS (Global Positioning System) satellite. GPS is a kind of satellite positioning system, and is realized by a plurality of GPS satellites orbiting around the earth. Each of these GPS satellites is equipped with a high-accuracy atomic clock, and periodically transmits a satellite signal including time information measured by the atomic clock.

  The receiving circuit 20 decodes the satellite signal received by the antenna 10 and outputs a bit string (received data) indicating the contents of the satellite signal obtained as a result of the decoding. Specifically, the receiving circuit 20 includes a high frequency circuit (RF circuit) 21 and a decoding circuit 22.

  The high-frequency circuit 21 is an integrated circuit that operates at a high frequency, and amplifies and detects an analog signal received by the antenna 10 to convert it into a baseband signal. The decoding circuit 22 is an integrated circuit that performs baseband processing, and decodes the baseband signal output from the high-frequency circuit 21 to generate a bit string indicating the content of data received from a GPS satellite. The decoding circuit 22 further acquires time information from the generated bit string, and calculates position information including latitude and longitude from the bit string. The receiving circuit 20 outputs the calculated time information and position information to the microcontroller 31.

  The control circuit 30 is a circuit that controls various circuits and mechanisms included in the satellite radio-controlled wristwatch 1, and includes a microcontroller 31, a motor drive circuit 35, an RTC (Real Time Clock) 36, and a nonvolatile memory 37. Consists of. The microcontroller 31 includes a calculation unit 32, a RAM (Random Access Memory) 33, and a ROM (Read Only Memory) 34, and is configured by one integrated circuit, for example.

  The calculation unit 32 performs various types of information processing according to programs stored in the ROM 34. Details of the processing executed by the calculation unit 32 in the present embodiment will be described later. The RAM 33 functions as a work memory of the calculation unit 32 and data to be processed by the calculation unit 32 is written. In particular, in the present embodiment, the RAM 33 holds values of various data for internal control, such as a position indicated by a pointer 52 described later and a display mode.

  The RTC 36 supplies a clock signal used for timing in the satellite radio-controlled wristwatch 1. In FIG. 2, the clock signal output from the RTC 36 is input to the microcontroller 31, and the microcontroller 31 counts pulses included in the clock signal by a counter (not shown). The calculation unit 32 acquires an internal time corresponding to the counted number of pulses, and determines a time (display time) to be displayed on the time display unit 51 based on the internal time.

  The motor drive circuit 35 outputs a drive signal for driving the motor included in the drive mechanism 50 according to the display time determined by the calculation unit 32. As a result, the display time generated by the control circuit 30 is displayed on the time display unit 51.

  Further, in the satellite radio-controlled wristwatch 1 according to the present embodiment, the arithmetic unit 32 corrects the internal time measured by the signal supplied from the RTC 36 based on the satellite signal received by the receiving circuit 20.

  The non-volatile memory 37 is a memory that retains stored data even when power is not supplied or when the satellite radio-controlled wristwatch 1 is restarted, and is, for example, a flash memory or an EEPROM. Details of data stored in the nonvolatile memory 37 will be described later.

  The power generation circuit 41 includes a solar cell disposed under the dial 53. The power generation circuit 41 generates power using external light such as sunlight irradiated on the satellite radio-controlled wristwatch 1 and supplies the generated power to the secondary battery 42.

  The secondary battery 42 includes a rechargeable battery such as a lithium ion battery and a battery management circuit that manages charging and discharging of the lithium ion battery and the like, and accumulates electric power generated by the power generation circuit 41. Then, the power necessary for the operation among the accumulated power is supplied to each part in the satellite radio-controlled wristwatch 1 such as the receiving circuit 20, the control circuit 30, and the driving mechanism 50.

  The power supply voltage detection circuit 43 is a circuit that measures the voltage of the secondary battery 42. A signal indicating the measured voltage is output to the microcontroller 31.

  The operation unit 60 is, for example, a crown or an operation button, and receives an operation by the user of the satellite radio-controlled wristwatch 1 and outputs the operation content to the control circuit 30. The control circuit 30 executes various processes according to the contents of the operation input received by the operation unit 60.

  The drive mechanism 50 includes a step motor that operates in accordance with the drive signal output from the motor drive circuit 35 described above and a train wheel, and the train wheel transmits the rotation of the step motor, thereby indicating the pointer. 52, the date plate 54 is rotated. The time display unit 51 includes a pointer 52, a date plate 54, and a dial plate 53. The pointer 52 includes an hour hand 52a, a minute hand 52b, a second hand 52c, a sub hour hand 52d, a sub minute hand 52e, a function hand 52f, and a mode hand 52g. On the dial 53, a sub display area 53b, a function display area 53c, and a mode display area 53d are also arranged.

  FIG. 3 is a diagram for explaining the characteristics of the pointer 52 and the date board 54 in the satellite radio-controlled wristwatch 1 shown in FIG. The pointer 52 and the date board 54 both display information such as time by pointing to any one of a plurality of positions by an analog mechanism, and have a property common to each other. When the pointer 52 and the date board 54 are not distinguished, they are described as an analog display mechanism.

  The mode hand 52g is a needle that indicates the display mode of the satellite radio-controlled wristwatch 1 in the mode display area 53d, and the mode hand 52g changes the position pointed according to the mechanical movement of the crown by the user without the power of the motor. . The display modes include a time mode, a chrono mode, an alarm mode, a daylight saving time display mode, and a battery remaining amount display mode. The time mode is a mode for displaying the current time, the chrono mode is a mode for operating the satellite radio-controlled wristwatch 1 as a chronograph, and the alarm mode is a mode for setting the alarm time and turning on / off the alarm. The daylight saving time display mode is a mode for displaying whether or not the daylight saving time is displayed on the function hand 52f, and the battery remaining amount display mode is a mode for displaying the battery remaining amount of the secondary battery 42 on the function hand 52f. Switching between the time mode, the chrono mode, and the alarm mode may be performed by the user pulling out or retracting the crown, and for switching to the daylight saving time display mode and the remaining battery level display mode, for example, the user can operate the operation unit in the time mode. This may be done by operating 60 buttons.

  The hour hand 52a, the minute hand 52b, and the second hand 52c point to positions on the dial 53 while rotating to display the main current time. The second hand 52c further indicates the passage of seconds from the start of measurement in the chrono mode. Both the hour hand 52a and the minute hand 52b are driven by the step motor A. The step motor A operates 360 steps per rotation (60 seconds) of the minute hand 52b, and one rotation of the minute hand 52b is one hour (1/12) of the hour hand 52a. The number of steps required for the hour hand 52a and the minute hand 52b to display all patterns is 4320 (360 × 12). The second hand 52c is driven by a step motor B, and the step motor B operates for 60 steps per rotation of the second hand 52c. The second hand 52c may display a power generation amount, a satellite radio wave reception status, and an alarm on / off status in accordance with the operation of the operation unit 60 by the user. Here, the hour hand 52a, the minute hand 52b, and the second hand 52c can be driven by interlocking the minute hand 52b and the second hand 52c, or the hour hand 52a, the minute hand 52b, and the second hand 52c can be driven independently. The driving method may be appropriately selected according to the specifications.

  The sub hour hand 52d and the sub minute hand 52e display the current time (sub time) and UTC time in a city different from the main in the time mode in the sub display area 53b, and display the elapsed time from the start of measurement in the chrono mode. In the alarm mode, the alarm time is displayed. The sub hour hand 52d is displayed for 24 hours. Both the sub hour hand 52d and the sub minute hand 52e are driven by the step motor C. The step motor C operates for 60 steps per one turn (60 seconds) of the sub minute hand 52e, and one turn of the sub minute hand 52e is one hour (1/24) of the sub hour hand 52d. The number of steps required for the sub hour hand 52d and the sub minute hand 52e to display all patterns is 1440 (60 × 24). A portion for displaying whether the current time is AM / PM may be provided on the dial 53.

  In the present embodiment, the function hand 52f indicates the day of the week by pointing to the left part of the function display area 53c in the time mode, and indicates the daylight saving time display by pointing to the lower part of the function display area 53c in the summer time display mode. In the battery remaining amount display mode, the remaining amount of the secondary battery 42 is displayed by pointing to the right portion of the function display area 53c according to the voltage measured by the power supply voltage detection circuit 43. In the chrono mode, the function hand 52f indicates a value in units of 1/20 second (20 steps from 0 to 0.95) of the elapsed time from the start of measurement.

  The date board 54 displays only the day of the current date. Both the functional hand 52f and the date plate 54 are driven by the step motor D. The step motor D operates for 60 steps per round of the functional needle 52f. Further, the date point of the date plate 54 changes every day by the geneva mechanism every time the function hand 52f makes five turns. Since there are 31 types of dates displayed by the date board 54 from 1st to 31st, the number of steps necessary for the function hand 52f and the date board 54 to display all patterns is 9300 (60 × 5 × 31). The motor that drives the functional hand 52f and the motor that drives the date plate 54 may be different. Whether or not to make the motors the same may be determined according to the internal space of the timepiece having the function hands 52f and the date plate 54, the required power consumption and the cost.

  The hand position detection unit 55 includes sensors that detect the positions of the hour hand 52a, the minute hand 52b, and the second hand 52c, and outputs a signal indicating the detection result of the sensors to the microcontroller 31. For example, in the case of a light detection type needle position detection mechanism, a circular plate or the like provided with a hole or a slit at a specific position is attached to a detection target needle or the like so as to rotate in synchronization. When the light reaches a specific position (reference position), light passes through the hole or slit. The sensor included in the needle position detection unit 55 detects the light that has passed through, and the needle position detection unit 55 outputs a signal based on the detection. In the present embodiment, when each of the hour hand 52a, the minute hand 52b, and the second hand 52c is at the 12 o'clock position, for example, the hand position detection unit 55 outputs a signal indicating that each hand is at a specific position. The hand position detection unit 55 may further include sensors that detect the positions of the sub hour hand 52d and the sub minute hand 52e, and may detect whether each of them is at a specific position. In addition, you may use the disc provided with the detection pattern instead of the disc provided with the hole or the slit. This detection pattern has two types of regions having different reflectances. The sensor included in the needle position detection unit 55 detects the reflected light of the light emitted to the detection pattern, and whether the needle or the like is at the reference position based on the intensity of the reflected light detected by the needle position detection unit 55. A signal indicating whether or not may be output, or a signal indicating the position of the needle may be output.

  The receiving circuit 20 and the hand position detection unit 55 are physically connected to the input / output port of the microcontroller 31 through a switching circuit. The microcontroller 31 can exchange a signal with the selected one of the receiving circuit 20 and the needle position detecting unit 55 by operating the switching circuit. If the number of input / output ports of the microcontroller 31 is large, the receiving circuit 20 and the needle position detection unit 55 may be directly connected to different input / output ports.

  Next, the operation of the microcontroller 31 of the control circuit 30 in this embodiment will be described. FIG. 4 is a functional block diagram showing functions realized by the satellite radio-controlled wristwatch 1. The calculation unit 32 included in the microcontroller 31 functionally executes a program stored in the ROM 34 to functionally, as shown in FIG. 5, an activation processing unit 31a, a reception control unit 31b, and a reference position setting unit. 31c, the function hand position determination part 31d, the time display control part 31e, the mode control part 31f, and the backup control part 31g are implement | achieved.

  The activation processing unit 31a includes an environmental temperature in the RTC 36 when a restart instruction is input from the operation unit 60 by a user operation, or when a watchdog timer built in the microcontroller 31 detects a system abnormality. When the oscillator is temporarily stopped because it is out of the operating temperature range of the oscillator, the satellite radio-controlled wristwatch 1 is restarted. In addition, the activation processing unit 31a executes a process for making the satellite radio-controlled wristwatch 1 usable when restarting.

  The reception control unit 31b controls activation of the reception circuit 20 and start of reception, and acquires data such as time information based on the satellite signal received by the reception circuit 20.

  The reference position setting unit 31c sets the first analog display mechanism based on a detection result of a sensor that detects a display position of a part of the plurality of analog display mechanisms (hereinafter referred to as “first analog display mechanism”). Calibrate. In the present embodiment, the first analog display mechanism is an hour hand 52a, a minute hand 52b, and a second hand 52c, and may include a sub hour hand 52d and a sub minute hand 52e. More specifically, the reference position setting unit 31c sets each analog display mechanism until the hand position detection unit 55 outputs a signal indicating that each of the first analog display mechanisms indicates the reference position. Rotate the stepping motor to be driven. By this reference position setting unit 31c, the position of the first analog display mechanism is calibrated by pointing to the reference position at the end of the rotation regardless of the position of these analog display mechanisms when restarting.

  The functional hand position determination unit 31d calibrates another part of the plurality of analog display mechanisms (hereinafter referred to as “second analog display mechanism”) based on information on the current display position. The first analog display mechanism is different from the second analog display mechanism. In the present embodiment, the second analog display mechanism is the functional hand 52 f and the date plate 54. The function hand 52f and the date plate 54 have an average operation interval longer than that of the first analog display mechanism. The second analog display mechanism may include an am / pm display hand. Here, the information related to the current display position of the second analog display mechanism is information sufficient to specify the position currently indicated by the second analog display mechanism, and the function hand position of the present embodiment. More specifically, the determination unit 31d performs calibration based on information indicating the display position of the second analog display mechanism stored in the nonvolatile memory 37. The functional hand position determination unit 31d may calibrate the second analog display mechanism based on time information and position information acquired from the satellite signal received by the receiving circuit 20.

  The time display control unit 31e controls the motor drive circuit 35 so that the display time is displayed on the time display unit 51. The time display control unit 31e controls the step motors A and B via the motor drive circuit 35 so that the hour hand 52a, the minute hand 52b, and the second hand 52c indicate the display time. In the time mode, the time display control unit 31e includes the step motors C and C via the motor drive circuit 35 so that the sub hour hand 52d and the sub minute hand 52e indicate the display time of the sub city and UTC, and the function hand 52f indicates the day of the week. D is controlled. In the summer time display mode and the remaining battery level display mode, the time display control unit 31e controls the step motor D so that the function hand 52f displays on / off of the summer time display and the remaining battery level. In the chrono mode, the time display control unit 31e displays the elapsed time from the start of measurement using the hour counter 52d, sub minute hand 52e, second hand 52c, and function hand 52f as the hour counter, minute counter, chronograph second hand, and small second, respectively. The step motors B, C, and D are controlled as described above. In addition, the time display control unit 31e controls the step motor D so as to switch the display of the date plate 54 when the date changes.

  The step motor can rotate the train wheel by a specified step from a certain position, but it is difficult to specify an absolute position. Therefore, the time display control unit 31e stores the positions pointed to by the hands 52 and the date board 54 in the RAM 33, and calculates the difference between the current position and the position to be newly pointed when changing the display mode. The step motor is controlled based on the above. In particular, for the functional hand 52f, the display contents are completely different depending on the display mode, and thus such control is essential.

  The mode control unit 31 f changes the display mode based on the input from the operation unit 60. For example, when the crown of the operation unit 60 is operated, the mode control unit 31f switches the display mode to the time mode, the chrono mode, and the alarm mode, and when the button is pressed during the time mode, the mode control unit 31f The display mode may be switched to the summer time display mode or the remaining battery level display mode.

  The backup control unit 31g stores data referred to at the time of restart in the nonvolatile memory 37. This data includes information indicating that acquisition from satellite signals is impossible or takes a long time, and information indicating the current position of the analog display mechanism.

  FIG. 5 is a diagram illustrating an example of data stored in the nonvolatile memory 37. The non-volatile memory 37 includes a plurality of pages such as pages 71, 72, 73, for example, and one page is used. Hereinafter, the used page is referred to as a used page. The usage page stores a write count counter, rollover information, leap second information, WN (week number), display mode, day information, city information, and summer time setting. These pieces of information are information that facilitates calculation of the current position of the second analog display mechanism and acquisition of time information. In addition, information on the current date, am / pm display information, and the like may be stored in the nonvolatile memory 37. The data stored in the nonvolatile memory 37 is supposed to be rewritten on average once or twice a day on average due to the limitation of the number of times of writing described later. Here, the data stored in the non-volatile memory 37 is preferably data that can be used to estimate the current position and has a smaller bit width instead of data indicating the current position itself of the second analog display mechanism. It is. For example, the day of the week (3 bits) may be stored in the nonvolatile memory 37 instead of the date. Thereby, the capacity of the nonvolatile memory 37 is saved, and the mounting area of the nonvolatile memory 37 can be reduced.

  Rollover information, leap second information, and WN are information acquired from satellite signals transmitted from GPS, and are information that does not change for several days to several decades. The day of the week information and the city information are information necessary for calculating the current date, and the current position of the date board 54 can be obtained from these information. The summer time setting is information indicating whether or not the satellite radio-controlled wristwatch 1 is displaying the summer time. Note that the information stored in the nonvolatile memory 37 may not necessarily be a backup of the information in the RAM 33. The microcontroller 31 may directly read or write information stored in the nonvolatile memory 37 and use it for various controls.

  When the nonvolatile memory 37 is a flash memory, writing is performed in units of pages, and the number of times of writing is limited (for example, 1000 to 10,000 times). The backup control unit 31g controls the page to which data is written so that the number of writes to each page of the nonvolatile memory 37 does not exceed the limit. More specifically, the number-of-writes counter stores information on the number of times data has been written to the use page of the nonvolatile memory 37, and the backup control unit 31 g has the number-of-writes counter that is the write limit of the nonvolatile memory 37. When the number of times is reached, the usage page is changed to the next page. Such control ensures reliability even when the number of times of writing is increased by updating information such as the display mode.

  Hereinafter, the process at the time of restart will be described in more detail. FIG. 6 is a flowchart showing an outline of processing of the microcontroller 31 at the time of restart. The activation processing unit 31a detects whether the input from the operation unit 60 is an all-reset instruction from the user. If the operation is detected, the watchdog timer built in the microcontroller 31 detects a system abnormality. When it is detected, or when the environmental temperature is outside the operating temperature range of the oscillator included in the RTC 36 and the oscillator is temporarily stopped, the processing shown in FIG. 6 is executed. First, the activation processing unit 31a performs initial processing such as self-check and peripheral circuit initialization (step S101). Next, the reception control unit 31b activates the reception circuit 20 to start reception of satellite signals (step S102). Here, if there is a switching circuit, the reception control unit 31b may switch the connection destination of the input / output port to the reception circuit 20 and then send a signal for starting the reception of the satellite signal to the reception circuit 20. The reception circuit 20 can independently receive satellite signals by a built-in processor, and receives satellite signals in parallel with the subsequent processing.

  Following the processing in step S102, the reference position setting unit 31c sets the positions of the hour hand 52a, the minute hand 52b, and the second hand 52c, which are the first analog display mechanism, to the reference position based on the signal from the hand position detection unit 55. Together (step S103). More specifically, the hour hand 52a and the minute hand are rotated by rotating the step motor A that drives the hour hand 52a and the minute hand 52b until a signal indicating that the hour hand 52a and the minute hand 52b are at the reference position is received from the hand position detecting unit 55. The position 52b is set as the reference position. Further, the second hand 52c is set to the reference position by rotating the step motor B until a signal indicating that the second hand 52c is at the reference position is received from the hand position detection unit 55. The reference position setting unit 31c may perform the same control on the sub hour hand 52d and the sub minute hand 52e. When there is a switching circuit, the reference position setting unit 31c may switch the connection destination of the input / output port to the needle position detection unit 55 before the process of step S102.

  Then, the reception control unit 31b waits for the reception circuit 20 to complete the reception of the satellite signal, and acquires time information and position information as a reception result from the reception circuit 20 after confirming the reception completion (step S104). If there is a switching circuit, the reception control unit 31b may switch the connection destination of the input / output port to the receiving circuit 20 and then confirm reception completion and acquire time information and the like. Further, the time display control unit 31e sets the current time and the current date based on the acquired time information (step S105). Here, the satellite signal reception by the receiving circuit 20 and the calibration of the first analog display mechanism by the hand position detection unit 55 are performed in parallel, so that the time required for restarting can be shortened. In addition, since the current time acquired by the satellite signal is displayed after the first analog display mechanism is calibrated, it is possible to prevent a situation in which an incorrect time is indicated.

  Next, the functional hand position determination unit 31d executes a needle position determination process for the functional hand 52f that is the second analog display mechanism (step S106).

  Details of the needle position determination processing will be described. 7 and 8 are flowcharts for explaining an example of processing by the functional hand position determining unit 31d. First, the functional hand position determination unit 31d acquires WN, day information, rollover information, or city information as necessary from the usage page of the nonvolatile memory 37 (step S201). Next, the functional hand position determination unit 31d calculates a reset date, which is a reset date, from WN, day of the week information, etc., and determines the reset date as the position of the date plate 54 (step S202). The function hand position determination unit 31d stores the determined position of the date plate 54 in the RAM 33. More specifically, when the WN or day information indicates the week number or day of the week in the target city indicating the time of the hour hand 52a or the minute hand 52b, the function hand position determining unit 31d resets from the rollover information and WN. The week is sometimes calculated, and the reset date is calculated from the calculated week and day information. When the WN and day information correspond to the UTC date, the function hand position determination unit 31d calculates the date in UTC from the rollover information, WN, and day information, and the function hand position determination unit 31d Based on the date, city information, and daylight saving time information, the reset date in the target city indicating the time of the hour hand 52a and the minute hand 52b may be calculated. In the case of a radio wristwatch using a standard radio wave or an analog wristwatch without a radio wave reception function, the date may be stored directly in the nonvolatile memory 37, and the functional hand position determination unit 31d may simply acquire it. In addition, the time display control unit 31e calculates the current date from the WN, day information, and city information included in the received satellite signal, and if the date is different from the reset date, the date plate 34 or the like is received. The display may be modified to show the date determined by the satellite signal.

  Next, the functional hand position determining unit 31d acquires the display mode from the nonvolatile memory 37 (step S203). When the acquired display mode indicates the time mode or the alarm mode (Y in Step S204), the function hand position determining unit 31d calculates the position of the function hand 52f from the day of the week information (Step S205). On the other hand, when the display mode is the summer time display mode (Y in step S206), the function hand position determination unit 31d acquires the summer time setting from the nonvolatile memory 37 (step S207), and determines the position of the function hand 52f from the summer time setting. Calculate (step S208).

  When the display mode is the battery remaining amount display mode (Y in Step S209), the function hand position determining unit 31d causes the power supply voltage detection circuit 43 to measure a voltage indicating the remaining battery amount of the secondary battery 42 (Step S209). S210), the position of the functional hand 52f is calculated from the measured voltage value (step S211). If the display mode is none of the above (N in step S209), the display mode is the chrono mode, and the position of the function hand 52f is frequently changed, and the nonvolatile memory is related to the rewrite limit count. 37, the position of the functional hand 52f cannot be determined. Therefore, the functional hand position determination unit 31d displays that it is necessary to manually adjust the position of the functional hand 52f by controlling the motor drive circuit 35 (step S212). This effect may be displayed, for example, by causing the second hand 52c to move. It should be noted that not only the position of the function hand 52f is determined based on the display mode, but also the position of the function hand 52f may be calculated based on operation information such as a switch before reset. By storing switch operation information in the non-volatile memory 37, it becomes possible to cope with a change in display according to a more detailed operation. For example, in the chrono mode, if the state is reset before or after measurement, the functional hand 52f can be specified as being at the 0 second position.

  After the hand position determination process is performed, the time display control unit 31e is configured to perform the analog display based on the current position, the current time, and the current date of the first analog display mechanism and the second analog display mechanism that have been found so far. Display current information on the display mechanism. More specifically, the time display control unit 31e controls the step motors A and B so that the hour hand 52a, the minute hand 52b, and the second hand 52c indicate the current time (step S107). Further, the time display control unit 31e displays the current date based on the current date, the current display mode, the calculated function hand 52f, and the position of the date board 54, and the function hand 52f displays the display mode. Control is performed so as to display in accordance with (step S108). With these operations, the processing at the time of restart is completed.

  In this way, the display position of the second analog display mechanism such as the function hand 52f and the date board 54 is determined using the information stored in the nonvolatile memory 37, and the display of the function hand 52f and the like is controlled accordingly. As a result, the user can manually omit the operation of adjusting the display position of the functional hand 52f and the like to the reference position. Particularly in a wristwatch, it is difficult to make all the analog display mechanisms the detection target of the mechanism for detecting the hand position from the viewpoint of space and cost. In the present embodiment, it is possible to calibrate an analog display mechanism, such as the function hand 52f, which has a relatively small change in display position without providing a mechanism for detecting the hand position. Further, as shown in FIG. 3, the number of steps of the step motor D required for adjusting the date plate 54 is enormous, and it takes a long time to manually adjust the reference position. In this embodiment, the time required for alignment is also greatly reduced.

  In the example described in FIGS. 7 and 8, when the display mode immediately before the restart is the chrono mode, the position of the function hand 52 f is manually adjusted. However, the function hand position determination unit 31 d includes the nonvolatile memory 37. From the above, the current position of the functional hand 52f may be determined by acquiring the position of the functional hand 52f. For example, the nonvolatile memory 37 stores operation information indicating the operation / stop of the function hand 52f in the chrono mode, the position of the function hand 52f being stopped, and the function hand position determination unit when the display mode is the chrono mode. Based on the operation information 31d stored in the nonvolatile memory 37, it is determined whether the functional hand 52f is stopped. Then, when the function hand 52f is stopped, the function hand position determination unit 31d acquires the position of the function needle 52f being stopped from the nonvolatile memory 37. In this case, when the display mode is the chrono mode, the backup control unit 31g sets a value indicating that the functional hand 52f is operating in the operation information at the start of measurement, and the backup control unit 31g sets the operation information at the end of the measurement. Is set to a value indicating that the functional hand 52f is stopped, and a measured value in units of 1/20 second (any one of 20 types) is written in the nonvolatile memory 37. Information indicating the position of the functional hand 52f may also serve as operation information. The function hand 52f may be in operation when a special value (for example, 31 or 255) is written in the information indicating the position of the function hand 52f.

  On the other hand, the functional hand position determination unit 31d uses the current date acquired from the satellite signal, the current time, the current date acquired from the standard radio wave, and the current time instead of at least a part of the information stored in the nonvolatile memory 37. The position of the function hand 52f and the like may be determined using the summer time information. When restarting, it is conceivable that the time from when the restart is necessary to when the restart is performed and the processing of the function hand position determining unit 31d is within a few minutes. In such a case, for example, the function hand position determination unit 31d uses the current date instead of the information (date information etc.) indicating the date stored in the nonvolatile memory 37 in steps S201 and S202 to use the date plate 54. The day of the week information may be acquired from the current date. In steps S207 and S208, the functional hand position determination unit 31d may calculate the position of the functional hand 52f from the summer time information included in the standard radio wave.

  Next, processing related to data storage by the backup control unit 31g will be described. FIG. 9 is a flowchart for explaining processing of the time display control unit 31e and the backup control unit 31g when the date changes.

  The time display control unit 31e determines whether or not 0:00 am 0 second exists between the time of the previous process and the time of the current process (has passed midnight) (step S301). . If midnight has passed (Y in step S301), the step motor D is driven from the position of the date plate 54 and the position of the function hand 52f, the current date, and the day of the week stored in the RAM 33. The number (drive amount) is calculated (step S302). Further, the step motor D is rotated by the calculated number of steps to change the display position of the date plate 54 and the display position of the function hand 52f (step S303).

  When the display positions of the date plate 54 and the function hand 52f are changed, the backup control unit 31g rewrites the day of the week information in the nonvolatile memory 37 (step S304). In this way, by rewriting the contents of the nonvolatile memory 37 in accordance with the change in the display position of the analog display mechanism accompanying the change in date, the displayed contents and the contents of the nonvolatile memory 37 can be matched. In addition, the backup control unit 31g rewrites data related to the date existing in the non-volatile memory 37 by rewriting the contents of the non-volatile memory 37 at a predetermined time of midnight per day. Yes. The update timing may be different from the timing for changing the display position. For example, when the display time is different from the UTC time, the information related to the date in the nonvolatile memory 37 may be updated at a timing when the date is changed at the UTC time.

  FIG. 10 is a flowchart for explaining processing of the mode control unit 31f and the backup control unit 31g when switching the display mode. The mode control unit 31f acquires a signal from the operation unit 60 (step S401). When the signal indicates an operation for switching the display mode (step S402), the mode control unit 31f changes the display mode to one corresponding to the operation (step S403). Then, the time display control unit 31e controls the display positions of the functional hands 52f and the like in accordance with the display mode (step S404), and the backup control unit 31g displays the display mode in which the display mode stored in the nonvolatile memory 37 is changed. (Step S405). As described above, the contents of the nonvolatile memory 37 are rewritten in accordance with the change of the display mode, so that the display state of the function hand 52 f and the like and the contents stored in the nonvolatile memory 37 can be matched. The backup control unit 31g may store not only the display mode but also information on whether or not the switch is pressed in the nonvolatile memory 37.

  The content displayed on the dial 53 and the display mode may be different from those shown in FIG. FIG. 11 is a plan view showing another example of the appearance of the satellite radio-controlled wristwatch 1 according to the embodiment of the present invention. The satellite radio-controlled wristwatch 1 shown in FIG. 11 is different from that shown in FIG. 1 in that there is no chrono mode or alarm mode, and neither the sub hour hand 52d nor the sub minute hand 52e. Calibration of the positions of the functional hands 52f and the date plate 54 of the satellite radio-controlled wristwatch 1 can also be performed by the methods described so far.

  FIG. 12 is a diagram for explaining the characteristics of the pointer 52 and the date board 54 in the satellite radio-controlled wristwatch 1 shown in FIG. Unlike the example of FIG. 2, the hour hand 52a and the minute hand 52b are driven by different step motors A and B, respectively. Therefore, the reference position setting unit 31c sets the hour hand 52a to the reference position by controlling the step motor A and the hand position detection unit 55, and controls the step motor B and the needle position detection unit 55 to control the minute hand 52b. To the reference position. On the other hand, the relationship between the functional hand 52f and the date plate 54 is the same as in the example of FIG.

  DESCRIPTION OF SYMBOLS 1 Satellite radio wave watch, 10 Antenna, 20 Receiving circuit, 21 High frequency circuit, 22 Decoding circuit, 30 Control circuit, 31 Microcontroller, 31a Starting process part, 31b Reception control part, 31c Reference position setting part, 31d Function hand position determination part 31e Time display control unit, 31f mode control unit, 31g backup control unit, 32 arithmetic unit, 33 RAM, 34 ROM, 35 motor drive circuit, 36 RTC, 37 nonvolatile memory, 41 power generation circuit, 42 secondary battery, 43 Power supply voltage detection circuit, 50 drive mechanism, 51 Time display section, 52 Hand, 52a Hour hand, 52b Minute hand, 52c Second hand, 52d Sub hour hand, 52e Sub minute hand, 52f Function hand, 52g Mode hand, 53 Dial, 53b Sub display area 53c Function display area, 53d Mode display area , 54 days plates, 55-hand position detecting unit, 60 operation unit, 71, 72, 73 pages.

Claims (11)

A plurality of analog display mechanisms each indicating one of a plurality of display positions;
First calibration means for calibrating a first analog display mechanism among the plurality of analog display mechanisms based on a detection result of a sensor that detects a display position of the analog display mechanism;
A second analog display mechanism that is different from the first analog display mechanism among the plurality of analog display mechanisms and that performs calibration based on information on a current display position of the second analog display mechanism; Calibration means;
An analog electronic timepiece characterized by including. The analog electronic timepiece according to claim 1,
Non-volatile memory;
Storage control means for storing information on the current display position of the second analog display mechanism in the nonvolatile memory;
An analog electronic timepiece further comprising: The analog electronic timepiece according to claim 2,
The storage control means stores the changed display position in the nonvolatile memory when the second analog display mechanism changes the display position.
An analog electronic timepiece characterized by that. The analog electronic timepiece according to claim 3,
In the case where the display mode of the plurality of analog display mechanisms is a predetermined mode, the storage control means displays the display changed in the non-volatile memory even if the second analog display mechanism changes the display position. Do not memorize the position,
An analog electronic timepiece characterized by that. The analog electronic timepiece according to any one of claims 2 to 4,
The storage control means stores information related to the current display position of the second analog display mechanism in the nonvolatile memory at a predetermined time.
An analog electronic timepiece characterized by that. The analog electronic timepiece according to claim 2 or 3,
The storage control means stores information indicating a display mode of the analog display mechanism in the nonvolatile memory,
The second calibration unit calculates a display position of the second analog display mechanism based on information indicating a display mode of the plurality of analog display mechanisms.
An analog electronic timepiece characterized by that. The analog electronic timepiece according to claim 6,
The second calibration means controls the at least some of the plurality of analog display mechanisms to indicate that calibration cannot be performed when the information indicating the display mode indicates a predetermined mode.
An analog electronic timepiece characterized by that. The analog electronic timepiece according to claim 1,
A receiver for receiving radio waves including time information indicating the date and time;
The second calibration means calibrates the second analog display mechanism based on the time information;
An analog electronic timepiece characterized by that. The analog electronic timepiece according to any one of claims 1 to 8,
A voltage detection unit for detecting a voltage of the secondary battery;
The second calibration means calibrates the second analog display mechanism further based on the detected voltage;
An analog electronic timepiece characterized by that. The analog electronic timepiece according to any one of claims 1 to 9,
A receiver for receiving a satellite signal including time information from the satellite;
The sensor detects whether the first analog display mechanism points to a specific position;
When restarted, the reception unit is instructed to start receiving satellite signals, and after the instruction, the first analog detection mechanism points to the specific position to the first calibration unit. It further includes a control unit that changes a display position until it is detected, and obtains a reception result from the reception unit after the first analog display mechanism points to the specific position.
An analog electronic timepiece characterized by that. A method for controlling an analog electronic timepiece having a plurality of analog display mechanisms each indicating one of a plurality of display positions,
Calibrating a first analog display mechanism among the plurality of analog display mechanisms based on a detection result of a sensor that detects a display position of the analog display mechanism;
Calibrating a second analog display mechanism different from the first analog display mechanism among the plurality of analog display mechanisms based on information on a current display position of the second analog display mechanism;
A method for controlling an analog electronic timepiece, comprising:

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