JP2005062078A - Radio adjustment watch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that consumption power required for periodic reception operation is useless in a watch with small battery capacity such as wrist watch because only long wave standard wave from a wave transmission station most easily received can be received for the radio adjustment watch which needs to receive periodically at every wave transmission for every wave transmission base station when there are a plurality of wave trasmission stations and transmission time zones of the long wave standard wave are different with each other transmission base station. <P>SOLUTION: The standard time set in advance is set in accordance with the time zone of each radio wave transmission station and the periodic time including the reception success time is set at the next period. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a radio-controlled timepiece.

Currently, in Japan, Germany, the United States, and China, the time code is superimposed on the long wave standard radio wave.
Japan is the only country that operates multiple radio transmission base stations in the same country. The carrier frequency of Japan East is 40 kHz, and the frequency of Japan West is 60 kHz. It is different.
The construction and operation of the second radio wave transmission base station is scheduled in China soon, and the carrier frequency of the long wave standard radio wave of the two radio wave base stations is the same, and the long wave standard radio wave transmission time is A method will be taken to transmit differently for each transmitting base station and prevent interference of the long wave standard radio wave.

  If there are multiple radio transmission base stations and the transmission time zone of the long wave standard radio wave is different for each radio transmission base station, in order to be able to receive from all radio transmission base stations with one radio correction base station, in China, It is necessary to perform a scheduled reception operation at every radio wave transmission time for each radio wave transmission base station.

If there are multiple radio transmission base stations and the transmission time zone of the long wave standard radio wave is different for each radio transmission base station, only the long wave standard radio wave from the radio transmission base station that is most easily received from the radio wave correction watch can be received on a regular basis. For this reason, the power consumption required for the scheduled reception operation from other radio wave transmission base stations is useless. In order to avoid the power consumption required for the conventional useless scheduled reception operation, the reception schedule setting means for performing the long wave standard radio wave reception operation at the previous successful reception time is provided from the next time, and the reception operation is performed in a time zone in which reception is not expected. There is a radio correction clock that eliminates the waste of running.
JP 2001-357425 A (2nd and 3rd pages)

  A watch with a small battery capacity such as a wristwatch cannot perform the above-mentioned scheduled reception operation every hour. For the purpose of reducing power consumption, the number of times of time correction operation using radio waves per day is changed from one to a plurality of times. Further, when there are a plurality of the radio wave transmission base stations and the transmission time zone of the long wave standard radio wave is different for each radio wave transmission base station, a scheduled reception operation is required for each radio wave transmission base station for each radio wave transmission base station. However, only the long-wave standard radio wave from the radio wave transmission base station that is most easily received from the radio-controlled timepiece needs to perform the scheduled reception operation, and the power consumption required for the other scheduled reception operations is useless.

  A radio-controlled timepiece comprising time-counting means capable of correcting the time by the long-wave standard radio wave, and time-correcting time means for time-measuring means by radio wave reception performed at a preset time, and transmitting the same frequency including the time information There are a plurality of radio transmission base stations, and the radio transmission time zones of the radio transmission base stations do not overlap, and the predetermined time is set corresponding to the time zone of each radio transmission base station. The radio time correction clock that uses the scheduled time including the successful reception time as the next scheduled time is used.

  The present invention provides the radio-controlled timepiece comprising time measuring means capable of correcting the time by the long wave standard radio wave including time information, and the time correcting function means of the time measuring means by the radio wave reception performed at the preset time. And there are a plurality of the radio transmission base stations that transmit the same frequency including the time information, the radio transmission time zones of the radio transmission base stations do not overlap each other, and the preset time period is each The scheduled time including the reception success time is set as the next scheduled time. For this reason, even a timepiece with a small battery capacity can perform a scheduled reception operation efficiently, and power consumption can be reduced.

  A radio-controlled timepiece according to an embodiment of the present invention will be described below with reference to the drawings. In this example, the long wave standard radio wave including the time information is received every day, and the time measuring unit is corrected based on the received long time standard radio wave, and the fixed time including the reception success time is set as the next fixed time.

  FIG. 2 is a block diagram showing the configuration of this example.

  Reference numeral 1 denotes an oscillation unit, and 3 denotes a control unit. The oscillating unit 1 outputs a clock signal to the control unit 3.

  4 is a time measuring means, and 2 is a receiver. The reception unit 2 includes a known reception control circuit, reception circuit, detection circuit, data detection circuit (not shown), and the like, and outputs time information included in the long wave standard radio wave including a time signal to the control unit 3. The time measuring means 4 measures the current time and outputs it to the control unit 3 and receives a time correction signal from the control unit 3 based on the time information, and corrects the current time during the time measurement.

  Reference numeral 5 denotes a display unit, which comprises an analog clock (not shown) having a hand with a timing function or a digital clock (not shown) having a liquid crystal display, and indicates the current time measured by the time measuring means 4 as a hand or Displayed on the liquid crystal display.

  Reference numeral 6 denotes an input unit. The input unit 6 includes a timing operation switch or the like (not shown).

  The control unit 3 is a control unit, and includes a CPU, a RAM, a ROM, etc., receives a clock signal from the oscillation unit 1, turns on the reception unit 2 at a fixed time, obtains time information, To correct.

  Next, the operation of this example will be described with reference to the flowchart of FIG. 1 and FIG.

  As shown in the main routine of FIG. 1, the control unit 3 determines whether it is a fixed time A (step 1a). If it is a fixed time A, a reception operation is performed, and it is determined whether the reception is successful at the fixed time A (step 1b). If the reception is successful at the scheduled time A, the current time measured by the timing means 4 is corrected and the display unit 5 is timed to return to the determination of whether it is the scheduled time A (step 1a).

If it is not the fixed time A, it is determined whether the reception is successful at the fixed time A (step 1c). If the reception was successful at the previous fixed time A, the process returns to the determination of whether it is the fixed time A (step 1a). Since the fixed time A can be received, the fixed time B is not received.

  If it is determined that the reception is successful at the scheduled time A (step 1b), and if the reception is successful at the previous scheduled time A (step 1c), if the reception is not successful, the determination of the scheduled time B Go to (Step 2a).

  If it is determined at the fixed time B (step 2a), the reception operation is performed. If the reception is successful at the scheduled time B, the current time measured by the timing means 4 is corrected and the display unit 5 is timed to return to the determination of whether it is the scheduled time B (step 2a).

  If it is not the regular time B, it is determined whether the reception has been successful at the previous regular time B (step 2c). If the reception is successful at the previous fixed time B, the process returns to the determination of whether it is the fixed time B (step 2a). Since the fixed time B can be received, the fixed time A is not received.

  When it is determined that the reception is successful at the scheduled time B (step 2b) and when the reception is successful at the previous scheduled time B (step 2c), when the reception is not successful, the determination of the scheduled time A Go to (Step 2a).

  The control unit 3 repeats the above operation, and if it can be received at the fixed time A, does not receive the fixed time B, and if it can be received at the fixed time B, does not receive the fixed time A, and receives both the fixed time A and the fixed time B. If not, the receiving operation is repeated until either one becomes receivable. Therefore, it is possible to efficiently perform scheduled reception, and a radio-controlled timepiece with low power consumption is possible.

  In this example, assuming that there are two radio transmission base stations, there are two types of fixed time A, fixed time B, and fixed time. However, the present invention is not limited to this. Automatic selection is also possible.

  The number of reception operations at the fixed time X is one or more, and the reception success rate can be increased by increasing the number of times. When the number of reception operations at the fixed time X is plural, it is preferable that the subsequent reception operation at the fixed time X is not performed when reception is successful.

  In this example, only the main routine is explained. However, the present invention is not limited to this, and it is possible to determine whether it is a fixed time by further reducing power consumption by creating a subroutine flow using a timer or an interrupt. .

Operation flowchart of radio wave correction watch which is one embodiment of the present invention Block diagram showing the configuration of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Oscillation part 2 Reception part 3 Control part 4 Time measuring means 5 Display part 6 Input part

Claims (1)

A radio-controlled timepiece comprising time-counting means capable of correcting the time by a long-wave standard radio wave including time information, and time-correcting time means of time-measuring means by radio wave reception performed at a preset time, the same including the time information There are multiple radio transmission base stations that transmit frequencies, the radio transmission time zones of the respective radio transmission base stations do not overlap, and the predetermined time corresponds to the time zone of each of the radio transmission base stations. The radio correction clock is characterized in that the scheduled time including the reception success time is set as the next scheduled time.

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