JP4976037B2 - Radio correction clock - Google Patents

Description

  The present invention relates to a radio wave correction watch, an electronic device, and a time correction method for receiving a standard radio wave including time information and correcting the time based on the time information included in the received standard radio wave.

  Conventionally, in a state where a timepiece is not used, for example, in a power generation timepiece having a photovoltaic power generation detection function, a power saving state is entered if a non-power generation state continues for a long period of time. Normally, when the watch is in a usable state, it receives standard radio waves including time information for scheduled reception and forced reception, and receives all the data necessary for time adjustment, while it saves power in the power-saving state. For this reason, reception of standard radio waves has been prohibited, and the reception interval for regular reception has been increased. In the power saving state, there is a technique for reducing the amount of received data and increasing the power saving effect than usual (see, for example, Patent Document 1).

  There is also a technique for prohibiting reception of standard radio waves when the battery voltage is low in order to reduce the load on the battery.

JP 2002-139586 A

  However, in this case, this conventional method prohibits the reception of the standard radio wave, so that it can only display the time by the time measuring means and cannot display the more accurate time. Even if the amount of received data is reduced to correct the time, there is no problem if the data reliability is high, that is, if the reception level is high, but if the data reliability is low, that is, the reception level However, when the amount of received data is low, the amount of received data is small, so that a sufficient safety margin cannot be secured, and there is a problem that the time may be corrected to misread data.

  In order to solve the above-described problems caused by the prior art, the present invention can correct a time more accurately and accurately without correcting the time of misread data, and an electronic device and a time correction. It aims to provide a method.

  In order to solve the above-described problems and achieve the object, a radio-controlled timepiece according to the present invention includes a time measuring unit that measures time, a receiving unit that receives a standard radio wave including time information, and a reception result by the receiving unit. A time correction determination means for determining whether to correct (hereinafter referred to as “correction availability”) whether or not the time measured by the time measurement means (hereinafter referred to as “time measurement time”) is corrected; A time correction unit that corrects the time measurement based on the result of whether the correction is possible, and the time correction determination unit has a plurality of determination criteria for determining whether the correction is possible, One of the determination criteria is selected, and whether or not the correction is possible is determined using the selected determination criteria.

  In the radio-controlled timepiece according to the present invention, in the above-described invention, the time correction determining unit performs an evaluation on whether or not correct time information is obtained based on the standard radio wave received by the receiving unit. An information evaluation unit, wherein the plurality of determination criteria are criteria for the time correction determination unit to determine whether the correction is possible or not based on an evaluation result performed by the time information evaluation unit. .

  In the radio-controlled timepiece according to the present invention, in the above invention, the evaluation result is a second evaluation that evaluates that at least the first evaluation result and time information more correct than the first evaluation result are obtained. The plurality of judgment criteria includes the first judgment criteria for correcting the time in the second evaluation result without performing the correction of the time measurement time in the first evaluation result, And a second criterion for performing the correction also at the time of the first evaluation result and the second evaluation result.

  The radio-controlled timepiece according to the present invention is the radio-controlled timepiece according to the above-mentioned invention, wherein the receiving means determines a predetermined time from the start to the end of reception of the standard radio wave once (hereinafter referred to as “reception time”). ), Select any one of the plurality of reception times, receive the standard radio wave for the selected reception time, and receive the time correction determination unit selected by the reception unit. According to the time, any one of the plurality of determination criteria is selected, and whether the correction is possible is determined using the selected determination criteria.

  The radio-controlled timepiece according to the present invention is the radio-controlled timepiece according to the above-mentioned invention, wherein the receiving means determines a predetermined time from the start to the end of reception of the standard radio wave once (hereinafter referred to as “reception time”). ), And the plurality of reception times include a first reception time and a second reception time longer than the first reception time, and the time correction determination means is configured to receive the first reception time. The first determination criterion is selected when is selected, and the second determination criterion is selected when the second reception time is selected.

  The radio-controlled timepiece according to the present invention includes a battery that drives the radio-controlled timepiece main body according to the above invention, and is in a normal operation state and a power-saving state in which the battery consumes less power than the normal operation state. There are two operation states, and the receiving unit selects the second reception time in the normal operation state, and selects the first reception time in the power saving state.

  The radio-controlled timepiece according to the present invention includes, in the above invention, a battery that drives the radio-controlled timepiece main body, and a voltage detection unit that detects a voltage of the battery, and the reception unit is detected by the voltage detection unit. As a result, the second reception time is selected when the voltage is greater than or equal to a predetermined value, and the first reception time is selected when the voltage is less than the predetermined value.

  Further, the radio-controlled timepiece according to the present invention is the radio-controlled timepiece according to the present invention, wherein the receiving means has a plurality of predetermined received data amounts of the standard radio wave (hereinafter referred to as “received data amount”), Select any one of the plurality of received data amounts, receive the standard radio wave for the selected received data amount, and the time correction determining unit according to the received data amount selected by the receiving unit Then, any one of the plurality of determination criteria is selected, and whether the correction is possible is determined using the selected determination criteria.

  In the radio-controlled timepiece according to the present invention, in the above invention, the plurality of reception times include a first received data amount and a second received data amount that is larger than the first received data amount. When the first received data amount is selected, the time correction determining means selects the first determination criterion, and when the second received data amount is selected, It is characterized by selecting a criterion.

  The radio-controlled timepiece according to the present invention includes a battery that drives the radio-controlled timepiece main body according to the above invention, and is in a normal operation state and a power-saving state in which the battery consumes less power than the normal operation state. There are two operating states, and the receiving means selects the second received data amount in the normal operating state, and selects the first received data amount in the power saving state.

  The radio-controlled timepiece according to the present invention includes, in the above invention, a battery that drives the radio-controlled timepiece main body, and a voltage detection unit that detects a voltage of the battery, and the reception unit is detected by the voltage detection unit. As a result, the second received data amount is selected when the voltage is equal to or higher than a predetermined value, and the first received data amount is selected when the voltage is lower than the predetermined value.

  The radio-controlled timepiece according to the present invention further includes a reception unit that receives an input of an operation instruction in the above-described invention, and the time correction determination unit is based on the input of the operation instruction received by the reception unit. One of the plurality of determination criteria is selected, and the correction possibility is determined using the selected determination criteria.

  An electronic apparatus according to the present invention includes the radio-controlled timepiece described in any one of the above.

  In addition, the time correction method according to the present invention includes a reception step of receiving a standard radio wave including time information, and a time measured by the time measuring means based on a reception result of the reception step (hereinafter referred to as “time measurement time”). A time correction determining step for determining whether or not to correct (hereinafter referred to as “correction propriety”), and a time correcting step for correcting the time measurement based on the result of the correction propriety determined by the time correction determining step The time correction determination step includes a plurality of determination criteria for determining whether correction is possible, selects any one of the plurality of determination criteria, and selects the selected determination criterion. And determining whether the correction is possible.

  According to the present invention, it is possible to obtain a radio-controlled timepiece, an electronic device, and a time correction method that can correct the time more reliably and accurately without correcting the time of misread data. There is an effect.

  Exemplary embodiments of a radio-controlled timepiece, an electronic device, and a time correction method according to the present invention will be described below in detail with reference to the accompanying drawings.

(Functional configuration of radio-controlled clock)
First, a functional configuration of the radio-controlled timepiece will be described. FIG. 1 is an explanatory diagram showing a functional configuration of a radio-controlled timepiece according to an embodiment of the present invention.

  In FIG. 1, the radio-controlled timepiece includes a time measuring unit 101, a receiving unit 102, a time correction determining unit 103, a time correcting unit 104, a determination reference storage unit 105, a time information evaluation unit 106, a battery 107, The voltage detection unit 108 and the reception unit 109 are included.

  The time measuring unit 101 measures time. The receiving unit 102 receives a standard radio wave including time information. Then, the time correction determination unit 103 determines whether or not to correct the time (“timed time”) measured by the time measuring unit 101 based on the reception result by the reception unit 102 (“correction availability”). The time correction unit 104 corrects the timekeeping time based on the result of the propriety of correction determined by the time correction determination unit 103.

  Here, the determination criterion storage unit 105 has a plurality of determination criteria for determining whether correction is possible stored in advance, and the time correction determination unit 103 is any one of the plurality of determination criteria. One is selected, and whether or not correction is possible is determined using the selected criterion.

  In addition, the time information evaluation unit 106 performs an evaluation on whether or not correct time information has been obtained based on the standard radio wave received by the reception unit 102. The plurality of determination criteria serve as criteria for the time correction determination unit 103 to determine whether correction is possible based on the evaluation results performed by the time information evaluation unit 106.

  The evaluation result includes at least a first evaluation result and a second evaluation result that evaluates that time information more correct than the first evaluation result is obtained. Specifically, the evaluation result may be, for example, a standard radio wave reception level. The reception level is usually divided into several stages (for example, three stages of “H”, “M”, and “L” in descending order of reception level). And the second evaluation result can be “H”.

  The reception level can be determined by the number of error bits per predetermined time (for example, 1 minute). For example, the “H” level may have an error bit “0”, the “M” level may have an error bit “1-2”, and the “L” level may have an error bit “3-5”. This reception level is not limited to the above, and can be set arbitrarily.

  The plurality of judgment criteria include the first judgment criteria that do not correct the timekeeping time in the first evaluation result, but the first evaluation result and the second evaluation result that are corrected in the second evaluation result. It may include a second criterion for making corrections sometimes.

  The receiving unit 102 has a plurality of predetermined times (“reception time”) from the start to the end of reception of a standard radio wave in one operation (“reception time”), and any one of the plurality of reception times is used. Select and receive the standard radio wave for the selected reception time. Then, the time correction determination unit 103 selects any one of a plurality of determination criteria according to the reception time selected by the reception unit 102, and determines whether correction is possible using the selected determination criteria. .

  FIG. 2 is an explanatory diagram showing the contents of the format of standard radio wave transmission data. In FIG. 2, the transmission of time data is 1 bit / sec. One minute is one frame. Within this frame, “minute”, “hour”, “integrated date” from “January 1”, “year” Information such as digits and "day of the week (Sun)" is included.

  The transmitted data includes a marker “P” code in addition to “0” and “1”. There are several “P” codes in one frame, and appear at the minute (0 seconds), 9 seconds, 19 seconds, 29 seconds, 39 seconds, 49 seconds, and 59 seconds. The “P” code appears only once at 59 seconds and 0 seconds in one frame, and the position where this “P” code appears is the minute position. That is, the time data such as the minute / hour data has a position in the frame determined based on the position of the minute, so that in order to extract the time data, it is necessary to first detect the minute position.

  Thereafter, for each bit transmitted every second, it is determined by detecting the waveform which data among the above three types. Therefore, the longer the reception time, the more accurate the time information. Usually 3 to 10 minutes. Among them, a plurality of reception times are prepared. The plurality of reception times include a first reception time and a second reception time longer than the first reception time. Then, the time adjustment determination unit 103 selects the first determination criterion when the first reception time is selected, and selects the second determination criterion when the second reception time is selected. You may do it.

  The battery 107 drives the radio wave correction watch body. And it has two operation states, a normal operation state and a power saving state in which the power consumption of the battery 107 is lower than that in the normal operation state. Here, the time correction determination unit 103 may select the second reception time in the normal operation state, and may select the first reception time in the power saving state.

  The voltage detection unit 108 detects the voltage (value) of the battery 107. Then, as a result of detection by the voltage detection unit 108, the reception unit 102 selects the second reception time when the voltage is equal to or higher than the predetermined value, and selects the first reception time when the voltage is lower than the predetermined value. Receive only during the reception time.

  The receiving unit 102 has a plurality of predetermined reception data amounts of standard radio waves (“reception data amount”), and selects any one of the plurality of reception data amounts, Receive standard radio waves for the selected amount of received data. Then, the time correction determination unit 103 selects one of a plurality of determination criteria according to the received data amount selected by the reception unit 102, and determines whether correction is possible using the selected determination criteria. You may make it do.

  The plurality of reception times include a first reception data amount and a second reception data amount that is larger than the first reception data amount. The time correction determination unit 103 selects the first determination criterion when the first reception data amount is selected, and selects the second determination criterion when the second reception data amount is selected. You may do it.

  There are two operation states, a normal operation state and a power saving state in which the battery 107 consumes less power than the normal operation state, and the receiving unit 102 selects the second received data amount in the normal operation state. In the power saving state, the first received data amount may be selected.

  In addition, as a result of detection by the voltage detection unit 108, the receiving unit 102 selects the second received data amount when the voltage is equal to or higher than a predetermined value, and selects the first received data amount when the voltage is lower than the predetermined value. May be.

  For example, as shown in FIG. 2, the amount of received data is only 10 seconds after detecting only seconds (only two consecutive “P” codes are detected) and seconds and minutes (detecting two consecutive “P” codes). (Only detection of 10 seconds), only seconds, minutes and hours (after detecting “P” code twice consecutively, only detection of about 20 bits (20 seconds)) and until the integration date (continuous twice “ After detection of P ”code, only detection of about 34 bits (34 seconds), up to the year (after detection of two consecutive“ P ”codes, only detection of about 50 bits (50 seconds)), until the day of the week (Only the detection of 53 bits (53 seconds) after the detection of “P” code which continues twice) is the amount of data that can be detected.

  The accepting unit 109 accepts an input of an operation instruction. The operation instruction is, for example, pressing a button. Then, the time correction determination unit 103 selects any one of a plurality of determination criteria based on the input of the operation instruction received by the reception unit 109, and determines whether correction is possible using the selected determination criteria. You may make it judge. By configuring in this way, for example, when using in a noisy environment or when you want to avoid time correction based on misinterpretation of time information included in the standard radio wave, the time only when the reception level is high The user can select a judgment criterion according to the purpose of use.

(Hardware configuration of radio correction watch)
First, an example of a functional configuration of the radio-controlled timepiece will be described. FIG. 3 is an explanatory diagram showing an example of the hardware configuration of the radio-controlled timepiece according to the embodiment of the present invention.

  In FIG. 3, the radio-controlled timepiece includes an antenna 301, a tuning unit 302, a reception ON / OFF unit 303, and the reception unit 102 shown in FIG. The reception unit 102 includes an amplification unit 304, a filter unit 305, a detection unit 306, an AD conversion unit 307, and a gain control unit 308.

  The radio-controlled timepiece further includes a sampling unit 309, a data determination unit 310, a reception level determination unit 311, a decoding unit 312, an acquired data amount determination unit 313, and a clock state management unit 314. The clock state management unit 314 includes a power generation detection unit 315 and the voltage detection unit 108 illustrated in FIG.

  The radio-controlled timepiece further includes a time update permission unit 316, a time measuring unit 101 illustrated in FIG. 1, an oscillation unit 317, and a display unit 318. The tuning unit 302 tunes with the antenna 301 and tunes the antenna 301 to a frequency such as 40 kHz or 60 kHz by switching the capacitance of the capacitor, for example. The reception ON / OFF unit 303 starts or ends reception at an arbitrary timing or by pressing a switch (not shown).

  The amplification unit 304 of the reception unit 102 amplifies the signal received by the antenna 301. The filter unit 305 removes components other than the desired frequencies (40 kHz, 60 kHz). The detection unit 306 detects the received standard radio wave. The AD converter 307 converts the detection output into a digital output. The gain control unit 308 automatically adjusts the amplification factor.

  The sampling unit 309 samples the output from the receiving unit 102 at a constant cycle (for example, 32 Hz). Then, the data determination unit 310 determines “0”, “1”, “P” or an error from the sampling result. In addition, it is determined whether noise is included, and if there is an error or noise, it is output to the reception level determination unit 311 together.

  The reception level determination unit 311 counts the error / noise information from the data determination unit 310 and divides the level (for example, “H”, “M”, “L” in three levels or five levels). Further, the reception level may be divided according to the strength of the received radio wave according to the output of the gain control unit 308, or both of them may be used. The reception level determination unit 311 realizes the function of the time information evaluation unit 106 shown in FIG.

  The decoding unit 312 generates time information using the format shown in FIG. 2 based on the determination result of “0”, “1”, and “P” codes. The acquired data amount determination unit 313 determines the amount of data to be received. As the data amount, for example, data of only time data, data including calendar information such as time data and year, month, day, and the like, and only types of seconds, seconds and minutes, seconds, minutes, and hours can be considered.

  The power generation detection unit 315 detects whether a power generation unit (not shown) is in a power generation state or a non-power generation state. Based on the detection result of the power generation detection unit 315, the clock state management unit 314 switches to the power saving state when the non-power generation continues for a predetermined time, or limits the reception time and the acquired data amount when the power saving state exists. Output to the acquired data amount determination unit 313. Further, the clock state management unit 314 updates the charge amount display or limits the function (write or alarm prohibition) based on the voltage value detected from the voltage detection unit 108.

  The time update permission unit 316 determines whether or not to update (correct) the time, and executes (or does not execute) the time according to the determination. Details of the time update permission unit 316 will be described later (see FIGS. 4 to 7). The reception level determination unit 311 and the time update permission unit 316 implement the function of the time correction determination unit 103 shown in FIG.

  The oscillation unit 317 is composed of, for example, an oscillation circuit, and the timer unit 101 is composed of a time counter that divides a signal from the oscillation unit 317 (oscillation circuit) and counts the time. The display unit 318 displays the time by at least one of a pointer type and a digital display.

  The data determination unit 310, the reception level determination unit 311, the decoding unit 312, the acquired data amount determination unit 313, the clock state management unit 314, and the time update permission unit 316 include, for example, a ROM storing a control program, The function of each component may be realized by an arithmetic processing means (for example, a processor) executing the program using data in a RAM that stores control information.

(Time correction procedure)
Next, an example of the procedure of the time correction method will be described. FIG. 4 is a flowchart showing an example of the procedure of the time correction method according to the embodiment of the present invention. In the flowchart of FIG. 4, first, an operation state is detected (step S401). Specifically, for example, it is detected whether it is a normal operation state or a power saving state.

  Here, when it is not a power saving state but a normal operation state (step S402: No), a normal reception process is performed (step S403). Then, the reception level at the time of the reception process is extracted, and when the extracted reception level is any one of “Hi (H)”, “Mid (M)”, and “Low (L)” (step S404). : Yes) updates the time update process, that is, the time being measured to the time according to the newly received time information (step S405), and ends the series of processes. On the other hand, if it is neither “Hi”, “Mid”, or “Low” in step S404 (step S404: No), the series of processing ends without performing the time update processing. Up to this point, it is almost the same as the normal time adjustment method.

  In step S402, when it is a power saving state (step S402: Yes), next, the reception level of the received radio wave is detected (step S406). Here, when the detected reception level is not “Hi” (that is, “Mid”, “Low” or lower) (step S407: No), the standard radio wave reception process is not performed (of course, the time of day). A series of processing is terminated without performing update processing. Accordingly, in the power saving mode, the standard radio wave reception process and the time correction can be performed only when the reception level is equal to or higher than a predetermined value (that is, “Hi”).

  If the detected reception level is “Hi” in step S407 (step S407: Yes), a reception process is performed (step S408). The reception process performed here may be the same as the normal reception process performed in step S403, or may be a reception process whose reception time is shorter than the normal reception process. Then, it transfers to step S405 and performs a time update process. Here, since the reception level is “Hi”, it is considered that the reliability of the time information is naturally high, so there is no problem even if the time update process is performed. Thereafter, the series of processing is terminated.

  FIG. 5 is a flowchart showing another example of the procedure of the time correction method according to the embodiment of the present invention. In the flowchart of FIG. 5, first, an operating state is detected (step S501). Specifically, for example, it is detected whether it is a normal operation state or a power saving state.

  Here, when it is not a power saving state but a normal operation state (step S502: No), a normal reception process is performed (step S503). Then, the reception level at the time of the reception process is extracted, and when the extracted reception level is “Hi”, “Mid”, or “Low” (step S504: Yes), the time update process, That is, the time being measured is updated to the time according to the newly received time information (step S505), and the series of processes is terminated. On the other hand, if it is neither “Hi”, “Mid”, or “Low” in step S504 (step S504: No), the series of processing ends without performing time update processing. Up to this point, the time correction method shown in FIG. 4 is almost the same.

  In step S502, when it is in the power saving state (step S502: Yes), reception processing is performed next (step S506). The reception process performed here may be the same as the normal reception process performed in step S503, and reception is performed such that the amount of time information included in the received radio wave is smaller than that of the normal reception process. It may be a process.

  Next, the reception level of the received radio wave is detected (step S507). Here, when the detected reception level is not “Hi” (that is, “Mid”, “Low”, or lower) (step S508: No), the series of processing ends without performing time update processing. To do. As a result, in the power saving mode, the time can be corrected only when the reception level is equal to or higher than a predetermined value (ie, “Hi”).

  In step S508, when the detected reception level is “Hi” (step S508: Yes), the process proceeds to step S505 to perform time update processing. Here, since the reception level is “Hi”, it is considered that the reliability of the time information is naturally high, so there is no problem even if the time update process is performed. Thereafter, the series of processing is terminated.

  FIG. 6 is a flowchart showing another example of the procedure of the time correction method according to the embodiment of the present invention. In the flowchart of FIG. 6, first, the voltage value of the battery 107 is detected (step S601). Specifically, for example, it is detected whether the voltage value is equal to or higher than a predetermined voltage value.

  Here, when the detected voltage value is equal to or greater than the predetermined value (step S602: Yes), normal reception processing is performed (step S603). Then, the reception level at the time of the reception process is extracted, and when the extracted reception level is “Hi”, “Mid”, or “Low” (step S604: Yes), the time update process is performed. This is done (step S605), and the series of processing is terminated.

  On the other hand, if it is not “Hi”, “Mid”, or “Low” in step S604 (step S604: No), the series of processing ends without performing time update processing. As described above, by performing normal reception only when the voltage of the battery 107 is equal to or higher than a predetermined value and performing time update processing, it is possible to prevent waste of power consumption when the voltage value is low.

  In step S602, when the detected voltage value is less than the predetermined value (step S602: No), the reception level of the received radio wave is then detected (step S606). Here, when the detected reception level is not “Hi” (that is, “Mid”, “Low” or less) (step S607: No), the standard radio wave reception process is not performed (of course, the time) A series of processing is terminated without performing update processing. As a result, when the voltage of the battery 107 is less than a predetermined value, the standard radio wave reception process and the time correction can be performed only when the reception level is equal to or higher than the predetermined value (ie, “Hi”).

  In step S607, when the detected reception level is “Hi” (step S607: Yes), reception processing is performed (step S608). The reception process performed here may be the same as the normal reception process performed in step S603, or may be a reception process whose reception time is shorter than the normal reception process. Then, it transfers to step S605 and performs a time update process. Here, since the reception level is “Hi”, it is considered that the reliability of the time information is naturally high, so there is no problem even if the time update process is performed. Thereafter, the series of processing is terminated.

  FIG. 7 is a flowchart showing another example of the procedure of the time correction method according to the embodiment of the present invention. In the flowchart of FIG. 7, first, the voltage value of the battery 107 is detected (step S701). Specifically, for example, it is detected whether the voltage value is equal to or higher than a predetermined voltage value.

  Here, when the detected voltage value is equal to or larger than the predetermined value (step S702: Yes), normal reception processing is performed (step S703). Then, the reception level at the time of the reception process is extracted, and when the extracted reception level is “Hi”, “Mid”, or “Low” (step S704: Yes), the time update process is performed. This is done (step S705), and a series of processing ends. On the other hand, if it is neither “Hi”, “Mid”, or “Low” in step S704 (step S704: No), the series of processing ends without performing time update processing. Up to this point, the time correction method shown in FIG. 6 is almost the same.

  In step S702, when the detected voltage value is less than the predetermined value (step S702: No), reception processing is next performed (step S706). The reception process performed here may be the same as the normal reception process performed in step S703, and reception is performed such that the amount of time information included in the received radio wave is smaller than that of the normal reception process. It may be a process.

  Next, the reception level of the received radio wave is detected (step S707). Here, if the detected reception level is not “Hi” (that is, “Mid”, “Low”, or lower) (step S708: No), the series of processing ends without performing time update processing. To do. Thereby, when the voltage of the battery 107 is less than a predetermined value, the time can be corrected only when the reception level is equal to or higher than the predetermined value (that is, “Hi”).

  In step S708, when the detected reception level is “Hi” (step S708: Yes), the process proceeds to step S705 and time update processing is performed. Here, since the reception level is “Hi”, it is considered that the reliability of the time information is naturally high, so there is no problem even if the time update process is performed. Thereafter, the series of processing is terminated.

  As described above, according to the radio-controlled timepiece, the electronic device, and the time adjustment method according to the present embodiment, reception during power saving is regarded as successful reception only when the reception level is determined to be high. The time of the unit 101 is updated (corrected) to the reception time, and when the voltage is low, reception is performed only when it is determined that the reception level is high, and update processing is also performed, so power consumption can be reduced regardless of the state of the power supply. The time can be corrected more reliably and accurately while saving.

  In the above embodiment, the radio wave correction clock has been described. However, the radio wave correction clock includes all kinds of clocks such as a wristwatch, a wall clock, and a table clock. In addition, the present invention is not limited to a radio wave correction watch, but a camera, a digital camera, a digital video camera, a game device, a mobile phone, a PDA (Personal Digital Assistant), a notebook personal computer incorporating the radio wave correction watch. It may be a portable information terminal device such as a home appliance or an electronic device including a car.

  As described above, the radio-controlled timepiece, electronic device, and time correction method according to the present invention receive a standard radio wave including a standard time information signal, and correct the time based on the standard time information signal applied to the received standard radio wave. Suitable for use in watches and electronic devices.

It is explanatory drawing which shows the functional structure of the radio-controlled timepiece concerning embodiment of this invention. It is explanatory drawing which shows the content of the format of the transmission data of a standard radio wave. It is explanatory drawing which shows an example of the hardware constitutions of the radio wave correction timepiece concerning embodiment of this invention. It is a flowchart which shows an example of the procedure of the time correction method concerning embodiment of this invention. It is a flowchart which shows another example of the procedure of the time correction method concerning embodiment of this invention. It is a flowchart which shows another example of the procedure of the time correction method concerning embodiment of this invention. It is a flowchart which shows another example of the procedure of the time correction method concerning embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Time measuring part 102 Receiving part 103 Time correction judgment part 104 Time correction part 105 Judgment reference | standard memory | storage part 106 Time information evaluation part 107 Battery 108 Voltage detection part 109 Reception part 308 Gain control part 310 Data judgment part 311 Reception level judgment part 313 Acquisition data Quantity determination unit 314 Clock state management unit 315 Power generation detection unit 316 Time update permission unit

Claims (5)

A time measuring means for measuring time;
A receiving means for receiving a standard radio wave including time information;
Time correction determination means for determining whether to correct the time (hereinafter referred to as “time measurement time”) measured by the time measurement means based on the reception result by the reception means (hereinafter referred to as “correction availability”);
Time correction means for correcting the timekeeping time based on the result of the correction availability determined by the time correction determination means;
Based on the standard radio wave received by the receiving means, at least a first evaluation result and a second evaluation result for evaluating that time information having higher reliability than the first evaluation result is obtained. Time information evaluation means;
When the first evaluation result is not the correction of the timekeeping time, and the second evaluation result is the first determination criterion for performing the correction, the first evaluation result, and the second evaluation result. Storage means for storing a second criterion for making the correction,
With
The receiving means has a predetermined time from reception start to end (hereinafter referred to as “reception time”) in a single reception operation of the standard radio wave as a first reception time and the first reception time. Or a predetermined reception data amount of the standard radio wave (hereinafter referred to as a “reception data amount”) that is equal to the first reception data amount and the first reception data amount. A reception operation of at least one of the reception operations of the second reception data amount larger than the reception data amount of 1 is possible;
The time correction determination means, when the reception operation of the first reception time or the reception operation of the first received data amount is selected, selects the first determination criterion stored in the storage means, When the reception operation of the second reception time or the reception operation of the second reception data amount is selected , a radio wave correction timepiece that selects a second determination criterion stored in the storage means . It has a battery to drive the radio-controlled watch body,
Having two operating states, a normal operating state and a power saving state in which the battery consumes less power than the normal operating state;
2. The radio-controlled timepiece according to claim 1 , wherein the reception unit selects the second reception time in the normal operation state and selects the first reception time in the power saving state. A battery that drives the radio-controlled watch body,
Voltage detecting means for detecting the voltage of the battery;
The reception means selects the second reception time when the voltage is greater than or equal to a predetermined value as a result of detection by the voltage detection means, and selects the first reception time when the voltage is less than the predetermined value. The radio-controlled timepiece according to claim 1 , wherein: It has a battery to drive the radio-controlled watch body,
Having two operating states, a normal operating state and a power saving state in which the battery consumes less power than the normal operating state;
2. The radio-controlled timepiece according to claim 1 , wherein the receiving unit selects the second received data amount in the normal operation state, and selects the first received data amount in the power saving state. . A battery that drives the radio-controlled watch body,
Voltage detecting means for detecting the voltage of the battery;
The reception unit selects the second received data amount when the voltage is equal to or higher than a predetermined value as a result of detection by the voltage detection unit, and selects the first received data amount when the voltage is lower than the predetermined value. The radio-controlled timepiece according to claim 1 .

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