JP2000147170A - Time signal relay device and time correction system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make correctable the time precisely and surely without miss- reading code even if the signal electric field intensities of relay wave and standard wave become close to each other. SOLUTION: The time signal relay device 2 receives a standard time wave signal S1 including a time code of a prescribed frequency (40 kHz) AM which has been modulated and emitted from a key station 1 and the frequency of the received standard time wave signal is made a wave signal S2 of 40.004 kHz following the standard of extremely low power radio of the Radio Law having the same format as the JG2AS base band signal which a wave correction clock 3 can not discriminate as time codes from the frequency of the standard time wave signal by shifting in a receivable range, 4Hz for example, and also transmitted to a wave correction clock placed indoors, for example.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time signal relay device and a time correction system for relaying a radio signal including a time code for a radio-controlled timepiece which receives a radio signal and corrects the time.

[0002]

2. Description of the Related Art For example, a radio-controlled timepiece is a long-wave (40 kHz) standard time radio wave (J) which transmits Japan Standard Time with high accuracy.
G2AS), and has a function of performing so-called zero return based on the received signal. A pointer position detecting device is provided to accurately adjust the position of the pointer to the correct hour at the time of zero return.

This type of radio-controlled timepiece has a built-in receiving system circuit for receiving a standard time radio signal, and a control circuit for driving a pointer driving system based on the received signal to correct the time. In the mode, the pointer position is corrected to a position corresponding to the time code of the received radio signal.

The radio-controlled timepiece is usually installed indoors, but often cannot be received at the installation location, for example, in a steel house or basement. Therefore, in order to eliminate the restriction on the installation location of the radio-controlled timepiece, a time signal relay device that receives a standard time radio signal, modulates the received time signal with a predetermined carrier wave, and transmits the signal is provided. Time-corrected signals are received by a radio-controlled clock to correct the time (for example,
See JP-A-5-333170).

[0005]

However, in the case of the above-described conventional repeater, since there is only one radio tower for standard time radio waves nationwide, the electric field strength is extremely weak at distant points and the carrier wave (40 kHz) is used. ) Is difficult to reproduce, there is a possibility that the transmission radio wave of the relay device cannot be synchronized with the standard time radio wave. Therefore, the code is inverted due to the phase difference. For example, the code “0” is changed to “1”.
There is a possibility that inconveniences such as misreading and the like may occur. Hereinafter, this problem will be described in more detail.

The standard time radio wave is a radio wave whose frequency is exactly 40.000 kHz as described above. Since it is difficult to synchronize the transmission radio wave of the relay device with the standard time radio wave,
The phase and frequency are always off. Further, ignoring the phase and trying to set the frequency to just 40.000 kHz will greatly increase the cost.

Therefore, when an oscillator having an error of ± 50 ppm including a temperature change is used in a general crystal oscillation circuit, the frequency is shifted by ± 2 Hz. Thus, the signal waveform processed by the radio-controlled timepiece when the oscillation frequency of the relay device is 40.002 kHz is as shown in FIG.

That is, the JG2AS code is an ASK signal for transmitting 1-bit data per second. FIG.
As shown in FIG. 11A, when the standard time radio wave is input to the receiving circuit of the radio-controlled timepiece without noise, the output waveform (1, 1) as shown in FIG.
0, 1) is reproduced. Here, if the radio-controlled timepiece is installed in a place where the electric field strengths of the radio wave from the 40.002 kHz relay device and the standard radio wave become equal to each other, the synthesized radio wave generates a beat of 1 Hz. In this case, the envelope of the synthesized radio wave is as shown in FIG. When this radio wave is received and decoded, FIG.
, And there is a high possibility that the code is a normal code and all codes are "1".

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to accurately and accurately measure the time without misreading a code even if the signal electric field strength between a relay radio wave and a standard radio wave becomes close. It is an object of the present invention to provide a time signal relay device and a time correction system capable of relaying a time radio wave so that correction can be performed.

[0010]

In order to achieve the above object, a time signal relay apparatus of the present invention comprises a receiving means for receiving a standard time radio wave signal including a time code of a predetermined frequency, and a receiving means for receiving a standard time radio signal including a time code of a predetermined frequency. The frequency of the standard time radio signal
Transmission means for shifting the frequency from the frequency of the standard time radio signal within a range that cannot be discriminated as a time code.

[0011] The time correction system of the present invention comprises a receiving means for receiving a standard time radio signal including a time code of a predetermined frequency, and a standard time radio signal received by the receiving means. A time signal relay device having a transmission means for transmitting the frequency signal within a range that cannot be determined as a time code from the frequency of the time signal relay device; And a radio-controlled clock that corrects the time.

Further, according to the present invention, the radio-controlled timepiece includes:
Compares the reception status of the radio signal with a predetermined reference range, and sets the time when the reception status is within the reference range, and sets the time when the reception status is outside the reference range. No control circuit.

Further, according to the present invention, there is provided notification means, and when the reception state of the radio signal is out of the reference range, the control circuit notifies the notification means to that effect.

According to the time signal relay apparatus of the present invention, the receiving means receives the standard time radio wave signal including the time code of the predetermined frequency and outputs it to the transmitting means. In the transmitting means, the frequency of the received standard time radio signal is set to a frequency shifted from the frequency of the received time signal within a range that cannot be determined as a time code.

Further, according to the time adjustment system of the present invention, the receiving means receives the standard time radio wave signal including the time code of the predetermined frequency and outputs it to the transmitting means. In the transmitting means, the frequency of the received standard time radio signal is set to a frequency shifted from the frequency of the standard time radio signal within a range in which the time code cannot be determined. The radio signal including the time code transmitted from the time signal relay device is received by the radio-controlled timepiece. Then, the reception state of the radio signal is compared with a predetermined reference range,
When the reception state is within the reference range, the time is corrected according to the time code. On the other hand, when the reception state is out of the reference range, the time is not corrected, and the notification is notified by, for example, a notification unit. As a result, the user can know that the current installation location of the clock is a location where the radio signal cannot be satisfactorily received.

[0016]

FIG. 1 is a block diagram showing an embodiment of a time correction system to which a time signal relay device according to the present invention is applied.

As shown in FIG. 1, the present time correction system has a long-time (40 kHz) standard time radio wave (JG2AS).
, A time signal relay device 2, and a radio-controlled timepiece 3.

The key station 1 AM-modulates a long-wave (40 kHz) standard time radio wave (JG2AS) S1 having a format as shown in FIG. Key station 1
Long wave (40
Specifically, in the format of the standard radio wave (JG2AS) S1 of “kHz”, in the case of the “1” signal, a signal of 40 kHz is transmitted for 500 ms (0.5 s) within one second (s) and “0” 800 ms for 1 second (s)
(0.8 s), a signal of 40 kHz is sent, and in the case of a “P” signal (synchronous signal), 200 ms in one second (s)
A signal of 40 kHz is sent for (0.2 s). FIG.
(A) shows a waveform example when data is (1, 0, 1).

The time signal relay device 2 transmits the signal from the key station 1 to the AM
A standard time radio signal S1 including a time code of a predetermined frequency (40 kHz) transmitted after being modulated is received, and the frequency of the received standard time radio signal is changed from the frequency of the standard time radio signal to the radio-controlled timepiece 3 on the receiving side. Cannot be discriminated as a time code, and has the same format as the JG2AS baseband signal within a receivable frequency range, for example, shifted by 4 Hz, and has a frequency of 40.004 kHz according to the weak radio standard of the Radio Law. As the signal S2,
For example, it transmits to the radio-controlled timepiece 3 installed indoors.

In the time signal repeater 2 of the present embodiment, in order to prevent misreading due to beats, the radio frequency correction clock 3 on the receiving side cannot determine the transmission frequency as a time code, and the frequency range within which the signal can be received. Of which, for example, 4 Hz (10
By setting the transmission frequency to 40.000 kHz ± 60 ppm or 40.000 kHz ± 30 ppm or less, misreading due to beats can be prevented.

FIG. 3 is a diagram showing the experimental results of the frequency difference and the electric field strength difference that cause the misreading of the time code. In FIG. 3, the horizontal axis represents the ratio of the electric field strength, and the vertical axis represents the frequency difference.

As shown in FIG. 3, if the ratio of the electric field intensity difference of the standard time radio wave is 16 dB or more, the signal is almost normally received, and the time code is not misread even if the signal is not normally received. Further, if the ratio of the electric field intensity difference of the standard time radio wave is 16 dB or less and there is a frequency difference of 60 ppm or more, FIG.
As shown in (1), since a large number of pulses are emitted and cannot be read as a time code, the time code is not misread. Further, if the ratio of the electric field intensity difference of the standard time radio wave is 16 dB or less and there is a frequency difference of 40 ppm or less, the radio wave becomes as shown by the envelope in FIG.
As shown in (h), a missing pulse occurs. Also in this case, the time code is not misread. Then, since the reception frequency of the radio-controlled timepiece 3 is adjusted to 40 kHz with high accuracy, the closer the transmission frequency of the time signal repeater 2 is to the frequency of the standard time radio wave, the more the time of the radio-controlled timepiece 3 is reduced. Easy to receive transmission radio waves.

As described above, the transmission frequency is set to 40.000 k
Hz ± 60 ppm or 40.000 kHz ± 3
By setting it to 0 ppm or less, misreading due to beats can be prevented.

It should be noted that the time signal relay device 2 transmits the radio signal S
2 can be transmitted at all times,
In the present embodiment, transmission is performed once a day at a very special time, for example, at 2:38 am.

The time signal relay device 2 is, specifically, shown in FIG.
As shown in the figure, the receiving antenna 20, the receiving RF amplifier 2
1, a detection circuit 22, a rectifier circuit 23, an integration circuit 24, a microcomputer 25, a sine wave oscillator 26 having a frequency of 40.004 kHz, an analog switch 27, a transmission RF amplifier 28, and a transmission antenna 29. Then, the receiving antenna 20, the receiving RF amplifier 2
1. Receiving means is constituted by a detection circuit 22, a rectifier circuit 23, an integrating circuit 24, and a microcomputer 25, and transmitted by a microcomputer 25, a sine wave oscillator 26, an analog switch 27, a transmitting RF amplifier 28, and a transmitting antenna 29. Means are configured.

In the time signal repeater 2, the standard time radio signal S1 received by the receiving antenna 20 passes through a receiving RF amplifier 21, a detecting circuit 22, a rectifying circuit 23, and an integrating circuit 24, as shown in FIG. The signal is converted into a baseband signal of the standard time radio signal S1 as shown and input to the microcomputer 25.

As shown in the flowchart of FIG. 4, the microcomputer 25 first receives the baseband signal from the integration circuit 24, decodes the JG2AS time code, and obtains time data such as hours, minutes, and 00 seconds. Then, the internal clock is corrected (ST1). Next, based on the time measured by the internal clock, time data to be transmitted is created (ST2). Then, the time data is converted into the analog switch 2 in the same format as the JG2AS baseband signal.
7 is output to the control terminal 7 as a gate pulse S25 (ST3).

The analog switch 27 includes a sine wave oscillator 2
The output of the oscillation signal S26 oscillated from 6 is turned on / off by the gate pulse S25 by the microcomputer 25 to obtain an AM modulated RF signal. This AM-modulated RF signal is amplified by the transmitting RF amplifier 28 and transmitted by the transmitting antenna 2.
9 is transmitted as a time radio signal S2 in the same format as JG2AS as shown in FIG.

The radio-controlled timepiece 3 is, in principle, a key station 1
A predetermined frequency (40 kHz) transmitted by AM modulation from
z) the standard time radio signal S1 including the time code, or the frequency 40.004 transmitted from the time signal relay device 2.
When the reception state of the standard time radio signal S1 or the time radio signal S2 is good in response to the time radio signal S2 of kHz, the pointer position is corrected to the time indicated by the time code. Then, the user is notified that the radio wave reception is not good.

FIG. 5 is a block diagram showing an embodiment of a signal processing system circuit of the radio-controlled timepiece according to the present invention, and FIG. 6 is an entire embodiment of a pointer position detecting device of the radio-controlled timepiece according to the present invention. FIG. 7 is a cross-sectional view showing the configuration, and FIG. 7 is a plan view of the main part of the pointer position detecting device of the radio-controlled timepiece according to the present invention.

In the figure, 30 is a signal processing system circuit, 31
Is a time radio signal receiving system, 32 is a reset switch, 33
Is an oscillation circuit, 34 is a control circuit, 35 is a drive circuit, 3
6 is a light emitting element as a notification means, 37 is a buffer circuit,
38 is a drive circuit, V _CC is a power supply voltage, C _{1 to} C ₃ are capacitors, R _{1 to} R ₈ are resistance elements, 100 is a watch body,
200 is a second hand drive system, 300 is a first reflection type optical sensor,
Reference numeral 400 denotes a minute hand drive system, 500 denotes an hour wheel, 600 denotes a minute wheel as an intermediate wheel, 700 denotes a manual correction shaft, 800 denotes a rotation detection plate, and 900 denotes a second reflection type optical sensor.

The time radio signal receiving system 31 receives the receiving antenna 31a and a long wave (for example, 40 kHz) including a time code signal transmitted from, for example, a key station, performs predetermined signal processing, and generates a control signal 34 as a pulse signal S31. And a long-wave receiving circuit 31b that outputs the signal to the receiver. The long-wave receiving circuit 31b includes a time signal relay device 2 (not shown).
, A RF amplifier, a detection circuit, a rectifier circuit, and an integration circuit.

The reset switch 32 is turned on when returning various states of the control circuit 34 to the initial state. When the reset switch 32 is turned on or when a battery (not shown) is set, the radio-controlled timepiece enters the initial correction mode.

The oscillation circuit 33 includes a crystal oscillator CRY and capacitors C ₂ and C ₃ , and supplies a basic clock having a predetermined frequency to the control circuit 34.

The control circuit 34 has a minute hand counter, a second hand counter, a standard minute / second counter, etc. (not shown). In the initial correction mode, the control circuit 34 receives the pulse signal S31 from the time radio wave signal receiving system 31 and, for example, receives the signal. the reception state of the time radio wave signal is compared with a predetermined reference range was, when the reception state is in the reference range, the stepping motor 210 and the control signal CTL _1, the CTL ₂ via the buffer 37 for the second hand when the initial setting of the pointer position and outputs such to the stepping motor 410 of the minute hand, i.e. to perform the zero-reset operation, when the reception state is not in the reference range, without outputting a control signal CTL _1, CTL ₂ drive signal DR ₁ and outputs to the drive circuit 35, radio reception is hardly to users by the light emitting element 36 as the notification means To notify. In addition, after performing a zero-return operation when the reception state is within the reference range, the received radio signal is decoded, and as a result of the decoding, if time can be set (time data can be reproduced). The control signals CTL _{1 and} CTL ₁ correspond to the count control of various counters based on the basic clock by the oscillation circuit 33 and the input levels of the detection signals DT ₁ and DT _{2 from} the first and second reflection-type optical sensors 300 and 900 _. The CTL ₂ is output to the second hand stepping motor 210 and the hour / minute hand stepping motor 410 via the buffer 37 to perform rotation control, thereby performing time correction control. On the other hand, as a result of decoding, when time cannot be set, the drive signal DR ₁ is output without outputting the control signals CTL _{1 and} CTL _2.
Is output to the drive circuit 35 to cause the light emitting element 36 as a notifying unit to emit light to notify the user that the radio wave reception is not good. Thus, the operation in the initial correction mode is completed.

After completing the operation in the initial correction mode, the control circuit 34 controls the normal correction mode. In the normal correction mode, the driving power from the power supply (not shown) is supplied to the time radio signal receiving system 31 for one minute before and after the hour, including every hour, so that the standard time radio signal S1 from the key station 1 can be received at every hour. 2:38 a.m. so that the radio signal S2 from the time signal relay device 2 can be received.
For one minute before and after the minute, the driving power from a power source (not shown) is supplied to the time radio signal receiving system 31. in this way,
When the standard time radio signal S1 is received, the receivable time zone of the standard time radio signal S1 from the key station 1 and the time signal relay device 2 are set so that the radio signal S2 from the time signal relay device 2 does not become an interfering radio wave. Is controlled so that the receivable time zone of the radio signal S2 from the receiver is different.

In the normal correction mode, the standard time radio signal S1 from the key station 1 is received in principle, and the radio signal is decoded. Count control of various counters based on the basic clock, and detection signals DT ₁ and DT ₁ by the first and second reflective optical sensors 300 and 900
In accordance with the input level of the DT _2, the control signal CTL _1, CTL
₂ is output to the stepping motor 210 for the second hand and the stepping motor 410 for the hour and minute hands via the buffer 37 to perform the rotation control and perform the time correction control, and to indicate that the standard time radio wave has been received normally. Set the radio wave normal reception flag. When the standard radio wave normal reception flag is set, the radio signal S2 from the time signal relay device 2 is not received, that is, 2:38 am
During one minute before and after the minute, the driving power is not supplied from the power supply (not shown) to the time radio signal receiving system 31, the normal radio wave normal reception flag is reset, and the key station 1
And receives the standard time radio signal S1 from the server to correct the time.

On the other hand, as a result of decoding, if time cannot be set, the drive signal DR ₁ is output to the drive circuit 35 without outputting the control signals CTL _{1 and} CTL ₂ , for example, as an alarm means. The light emitting element 36 emits light to notify the user that the radio wave reception is not good. In this case, the radio signal S2 is received from the time signal relay device 2, and when the radio signal S2 is received normally, the time is corrected according to the time code of the radio signal S2 obtained as a result of decoding.
Can not be received normally, if the signal waveform is as shown in FIG. 2 (f), as the installation position of the time signal repeater 2 is inadequate, it outputs a control signal CTL _1, CTL ₂ without, for example, it outputs a drive signal DR ₁ to the drive circuit 35, while the light emitting element 36 serving as notifying means to notify the user. After the completion of the time correction, or when the reception of the radio signal S2 from the time signal relay device 2 is not normal, the signal waveform is as shown in FIG. 2 (f), and the light emitting element 36 emits light to notify the user. 2 or when the signal waveform is not as shown in FIG. 2 (f), the standard radio wave normal reception flag is reset to receive the standard time radio signal S1 from the key station 1 every hour. To return to the time adjustment mode.

Drive circuit 35 is an npn-type transistor
Q1 and resistance element R₁, R_TwoIt consists of.
The collector of the transistor Q1 comprises a light emitting diode
The emitter is connected to the cathode of the light emitting element 36, and the emitter is grounded.
And the base is a resistive element R_TwoThrough the driver of the control circuit 34.
Eve signal DR₁Connected to the output line. Also,
Resistance element R₁Is the power supply voltage V_CCSupply line and light emitting element 3
6 is connected to the anode. That is, the light emitting element 3
6 is a high-level drive signal DR from the control circuit 34.
₁Drive circuit 35 to emit light when is output.
It is connected to the.

[0040] The drive circuit 38 is constituted by npn type transistors Q2, Q3 and a resistor R ₅ to R _8,.

As shown in FIG. 6, the timepiece main body 100 has a middle plate 120 connected to the lower plate 110 at a substantially central portion in a space formed by the lower plate 110 and the upper plate 130, and With respect to predetermined positions of the lower plate 110, the middle plate 120, and the upper plate 130 in the space, the second hand drive system 200, the first reflection type optical sensor 300, the second drive system 400, the hour wheel 500, the back of the day. The car 600, the manual correction shaft 700, and the second reflection type optical sensor 900 are fixed or supported.

The second hand drive system 200 includes a first stepping motor 210, a first fifth wheel & pinion 220, and a second hand wheel 230.
It consists of. First stepping motor 21
0 indicates a control circuit 34 in which the stator 210a is mounted on the lower plate 110, the rotor 210b is supported by the lower plate 110 and the upper plate 130, and is input via the buffer circuit 37.
Rotational direction based on the output control signal CTL _1, the rotational angle and the rotational speed is controlled.

The first fifth wheel & pinion 220 is rotatably supported by the lower plate 110 and the upper plate 130, and its wheel teeth are meshed with the rotor 210 b of the first stepping motor 210, and
The rotation speed of 10b is reduced to a predetermined speed. The first fifth wheel & pinion 220 is configured to rotate once every 15 seconds, for example, and a slit-shaped through hole 220a is formed in a part of a region where the second wheel & pinion 230 overlaps.

The second hand wheel 230 has one end of its shaft portion
The other end side penetrates the middle plate 120 to the lower plate 110 side, and the second hand shaft 230a is press-fitted to the other end side. The second hand shaft 230a is inserted through a through hole 440b of a minute hand pipe 440a that penetrates a lower plate 110 to be described later and protrudes to a surface side on which a timepiece dial and the like are formed. Can be Second hand wheel 230
The second hand pinion is engaged with the pinion of the first fifth wheel & pinion 220 so that the pinion rotates once every 60 seconds. The second hand wheel 230
A light reflection surface 230b is formed in a part of the overlapping area with the first fifth wheel & pinion 220 so as to face the through hole 220a formed in the first fifth wheel & pinion 220. The second hand drive system 200 is configured such that the second hand points to the hour when the light reflecting surface 230b is overlapped with the through hole 220a, that is, when the light reflecting surface 230b faces the hole 220a.

In the first reflection type optical sensor 300, a light emitting element 310 composed of a light emitting diode and a light receiving element 320 composed of an npn transistor are arranged in parallel, and the light emitting portion of the light emitting element 310 and the light receiving surface of the light receiving element 320 are arranged. Through the through hole 130a formed in the upper plate 13,
The second hand wheel 230 is disposed on the upper plate 130 so as to face the surface on which the light reflecting surface 230b of the second hand wheel 230 is formed through the through hole 220a of the second wheel 220.

Light emitting element 3 of first reflection type optical sensor 300
One end of the anode of the power supply voltage V _CCDora connected to
Resistance element R in Eve circuit 38_FiveIs connected to the other end of
The cathode is a dry circuit which is also provided in the drive circuit 38.
It is connected to the collector of the transistor Q2. this
The emitter of driver transistor Q2 is grounded,
Is the resistance element R₆Drive signal of the control circuit 34 via
DR_TwoConnected to the output line. That is, light emission
The element 310 is driven from a high level by the control circuit 34.
Signal DR_TwoDrive to emit light when output
It is connected to a circuit 38.

Light receiving element 3 of first reflection type optical sensor 300
The collector of 20 with is connected to the power supply voltage V _CC via the resistor element R _3, are connected to the control circuit 34, the emitter is grounded. That is, the light receiving element 320
Indicates that the light emitted from the light emitting element 310
The light reaching the second hand wheel 230 via the light-reflecting surface 230b through the light-transmitting holes 130a and 220a.
through a only when received by the light receiving element 320, is input to the control circuit 14 a detection signal DT ₂ in the low level.

The minute hand drive system 400 includes a second stepping motor 410, a second fifth wheel & pinion 420, a third wheel & pinion 430 and a minute hand wheel 440. The second stepping motor 410 has a configuration in which the stator 410 a is mounted on the lower plate 110, the rotor 410 b is supported by the lower plate 110 and the upper plate 130, and the control circuit 34 receives an input via the buffer circuit 37. rotational direction based on the output control signal CTL _2, the rotation angle and rotation speed is controlled.

The second fifth wheel & pinion 420 is rotatably supported by the lower plate 110 and the upper plate 130, and its wheel teeth are meshed with the rotor 410b of the second stepping motor 410, so that the
The rotation speed of 10b is reduced to a predetermined speed.

The third wheel & pinion 430 is configured such that one end of a shaft portion has an upper plate 130.
, And the other end side is disposed so as to penetrate the middle plate 120, and the wheel tooth portion is meshed with the pinion portion of the second fifth wheel & pinion 420.

The minute hand wheel 440 has a through hole 440b at the center.
Is formed, and one end of the minute hand pipe 440a is pivotally supported by the middle plate 120, and the shaft portion on the other end side is formed by the lower plate 11
0, a through-hole 500 of an hour hand pipe 500a of an hour wheel 500 protruding toward the surface on which a timepiece dial or the like is formed.
b, and a minute hand (not shown) is attached to the tip of the cartridge. The minute hand wheel 440 is configured to make one rotation every 60 minutes.
The second hand shaft 230a is inserted through 0b, and its ring tooth portion is engaged with the pinion portion of the third wheel & pinion 430. Such a minute hand 440 has a so-called slip mechanism.

The hour wheel 500 has a through hole 500b at the center.
Is formed in a substantially T-shape with a ring-tooth portion formed in a watch body 1
The hour hand pipe 500a is provided in the clock dial 00, protrudes through the lower plate 110, and protrudes toward the dial of the timepiece. The hour wheel 500 is 1
It is configured to rotate by 30 ° in time and make one rotation in 12 hours, and the minute hand pipe 440a is inserted through the through-hole 500b as described above. A through hole 500d as a first light transmission portion is formed on a surface 500c of the hour wheel 500 facing the minute wheel 440. This hour wheel 5
As shown in FIG.
One of the positions equally divided into 12 at 30 ° in the circumferential direction of 0
It is formed at 11 places except the place. That is, it is configured such that position detection for one hour out of twelve hours is not performed.

The minute wheel 600 is rotatably supported by a protrusion 110 a formed on the lower plate 110, and its wheel teeth are engaged with the minute hand pipe 440 a of the minute hand wheel 440, and the hook part is an hour wheel 500. Of the minute hand wheel 44
The rotation speed of 0 is reduced to a predetermined speed and transmitted to the hour wheel 500. In addition, the minute wheel 600 is configured to make one revolution at N (N is a positive integer) time, and its wheel teeth mesh with the correction pinion 700a of the manual correction shaft 700 and partially. Are provided so as to face a part of the rotation detection plate 800.

The manual correction shaft 700 has a substantially T-shape.
A correction pinion 700a at the tip is pivotally supported by a projection 110b formed on the lower plate 110 in a state of penetrating an opening 130b formed on the upper plate 130, and a head 700b is moved from the upper plate 130 to a clock. It is arranged so as to protrude out of the main body 100. The manual correction shaft 700 is configured to rotate once every 60 minutes in the same phase as the minute hand wheel 440. As described above, the wheel teeth of the minute wheel 600 are engaged with the correction pinion 700a, and the minute hand is driven. When the minute hand wheel 440 is driven by the system 400, it rotates in the same phase as the minute hand wheel 440 via the minute wheel 600, and when the minute hand drive system 400 is not operated, the head position is rotated by rotating the head 700b. It is configured to allow manual correction.

The rotation detecting plate 800 has a disk shape, and its central portion rotates in accordance with the rotation of the minute hand wheel 440.
The shaft of the minute hand wheel 440 between the minute hand wheel 440 and the hour hand wheel 500 is fixed with its axis substantially coincident. Further, a light reflecting surface 800a as a second light transmitting portion is provided in a part of a region of the rotation detecting plate 800 facing the surface 500c of the hour wheel 500 so as to face the through hole 500d as shown in FIG. Is formed.

In the second reflection type optical sensor 900, a light emitting element 910 composed of a light emitting diode and a light receiving element 920 composed of an npn transistor are arranged side by side, and the light emitting portion of the light emitting element 910 and the light receiving surface of the light receiving element 920 are arranged. , Through the through-hole 110c formed in the lower plate 110 and further through the through-hole 500d formed in the hour wheel 500, the rotation detecting plate 8
The light reflecting surface 800a is disposed on the lower plate 110 so as to face the surface 800b on which the light reflecting surface 800a is formed.

Light emitting element 9 of second reflection type optical sensor 900
One end of the anode of the power supply voltage V _CCDora connected to
Resistance element R in Eve circuit 38₇Is connected to the other end of
The cathode is a dry circuit which is also provided in the drive circuit 38.
It is connected to the collector of the transistor Q3. this
The emitter of driver transistor Q3 is grounded,
Is the resistance element R₈Drive signal of the control circuit 34 via
DR_ThreeConnected to the output line. That is, light emission
The element 910 is driven from the control circuit 34 to a high level.
Signal DR_ThreeDrive to emit light when output
It is connected to a circuit 38.

Light receiving element 9 of second reflection type optical sensor 900
The collector of the transistor 20 is connected to the power supply voltage V _CC via the resistor R ₄ , and also connected to the control circuit 34, and the emitter is grounded. That is, the light receiving element 920
Indicates that the light emitted from the light emitting element 910 passes through the through-hole 500d.
It reaches the surface 800b of the rotation detection plate 800 through, and the light reflected by the light reflecting surface 800a only when received by the light receiving element 920 through the hole 500d, a detection signal DT ₁ at low level It is input to the control circuit 34.

The light reflecting surface 800 of the rotation detecting plate 800
The relationship between “a” and the through-hole 500d of the hour wheel 500 is set so that the minute hand and the hour hand (not shown) indicate the hour when the light reflecting surface 800a faces the through-hole 500d.

Next, the time adjustment control operation according to the above configuration will be described with reference to FIG. Here, the normal mode operation of the minute hand system will be described as an example.

From the key station 1, a standard time radio wave (JG2AS) S1 of a long wave (40 kHz) having a format as shown in FIG. 2A is AM-modulated and transmitted. The standard time radio signal S1 transmitted from the key station 1 is received by the time signal relay device 2 and the receiving antennas 20 and 31a of the radio-controlled timepiece 3.

In the time signal relay device 2, the standard time radio wave S 1 received by the receiving antenna 20 is
Amplifier 21, detection circuit 22, rectifier circuit 23, integration circuit 2
4 is converted into a baseband signal of the standard time radio signal S1 as shown in FIG. The microcomputer 25 receives the baseband signal, decodes the JG2AS time code, obtains time data such as hours, minutes, and 00 seconds, and corrects the internal clock. Then, time data to be transmitted is created based on the time measured by the internal clock. This time data is output to the control terminal of the analog switch 27 as a gate pulse S25 in the same format as the JG2AS baseband signal. In the analog switch 27, the output of the oscillation signal S26 oscillated from the sine wave oscillator 26 is turned on / off by the gate pulse S25 by the microcomputer 25, and the AM modulation R
An F signal is obtained. This AM modulated RF signal is
The signal is amplified by the F-amplifier 28 and transmitted from the transmitting antenna 29 as shown in FIG.
It is transmitted as a radio signal S2 in the same format as JG2AS as shown in FIG. In the present embodiment,
The transmission of the radio signal S2 by the time signal relay device 2 is 2 am
It is performed only once a day at 18:00.

In the radio-controlled timepiece 3, as shown in FIG. 10, the control circuit 34 receives the standard time radio signal S1 from the key station 1 for one hour before and after the hour, including every hour, so that it can be received every hour. Then, the driving power from a power source (not shown) is supplied to the time radio signal receiving system 31. Thereby, a long wave (for example, 40 kHz) including the time code signal from the key station received by the receiving antenna 31a of the time radio signal receiving system 31 is provided.
z) undergoes predetermined signal processing in the long wave receiving circuit 31b,
Output to the control circuit 34 as a pulse signal S31 (S
T11, ST12).

In the control circuit 34, the received radio signal is decoded, and as a result of the decoding, it is determined whether or not the clocking is possible (normal reception) (ST13).
If it is determined in step ST13 that the reception is normal, the count control of various counters based on the basic clock by the oscillation circuit 33 and the detection signals DT ₁ and D by the first and second reflective optical sensors 300 and 900 are performed.
Depending on the input level of T _2, the control signal CTL _1, CTL ₂
Is the stepping motor 2 for the second hand via the buffer 37
Time correction control is performed by performing rotation control by outputting to the stepping motor 410 and the hour and minute hands 410 (ST14). Then, a standard radio wave normal reception flag indicating that the standard time radio wave has been normally received is set (ST15).

If it is not the reception time of the standard time radio signal S1 (ST11), and if it is determined in step ST13 that the reception is not normal or if the standard radio wave normal reception flag is set, the time signal relay device 2 It is determined whether or not the current time is the reception time of the radio signal S2 (ST
16). If it is determined in step ST16 that it is not the reception time of the radio signal S2, the process proceeds to step ST11.

On the other hand, if it is determined in step ST16 that it is the reception time of the radio wave signal S2, it is determined whether or not the standard radio wave normal reception flag is set (ST17). If it is determined in step ST17 that the standard radio wave normal reception flag is set, the time radio wave signal receiving system 31
Is not supplied by a power supply (not shown) to the
The standard radio wave normal reception flag is reset (ST1
8) The process proceeds to step ST11.

On the other hand, if it is determined in step ST17 that the standard radio wave normal reception flag has not been set, the radio wave signal S2 from the time signal repeater 2 is received so that the radio wave signal S2 can be received. During the minute, the time radio signal receiving system 31 is supplied with driving power from a power supply (not shown). In this case, the radio signal S2 from the time signal relay device 2
Is received, and it is determined in the control circuit 34 whether or not the signal has been normally received (ST19, ST20). If it is determined in step ST20 that the reception is normal, the count control of various counters based on the basic clock by the oscillation circuit 33 and the detection signals DT ₁ and DT by the first and second reflective optical sensors 300 and 900 are performed. _Two
The control signals CTL _{1 and} CTL ₂ are transmitted via the buffer 37 in accordance with the input level of the second hand stepping motor 210.
The time correction control is performed by outputting rotation to the stepping motor 410 for the hour and minute hands and performing rotation control (ST21).

If it is determined in step ST20 that the reception is not normal, it is determined whether or not the signal waveform is as shown in FIG.
It is determined whether or not a beat signal of z is generated (ST22). Here, the radio signal S2 by the time signal relay device 2 and the standard time radio signal S by the key station 1 happen to occur.
When the radio-controlled timepiece 3 is installed in a place where the electric field strengths of the radio waves 1 and 2 are equal to each other, the synthesized radio waves generate a beat of 2 Hz. At this time, the envelope of the synthesized radio wave is shown in FIG.
The input signal to the control circuit 34 is as shown in FIG.
As shown in FIG. In this case, step ST22
In, affirmative determination is made, this signal is from a completely different than when normal, as the installation position of the time signal repeater 2 is inadequate, without outputting a control signal CTL _1, CTL ₂ For example, drive signal DR ₁ is supplied to drive circuit 3
5 to make the light emitting element 36 as a notifying unit emit light to notify the user (ST23). Then, the standard radio wave normal reception flag is reset (ST18), and the process proceeds to step ST11. Also, when the signal waveform is not as shown in FIG. 2 (f), the standard radio wave normal reception flag is reset (ST18), and the process proceeds to step ST11.

As described above, according to this embodiment, the standard time radio signal S including the time code of the predetermined frequency (40 kHz) transmitted from the key station 1 after being AM-modulated.
1 is received, and the frequency of the received standard time radio signal is changed from the frequency of the standard time radio signal to the radio-controlled clock 3 on the receiving side.
Is a time code that cannot be determined as a time code and has the same format as the JG2AS baseband signal within a receivable frequency range, for example, shifted by 4 Hz, and has a frequency of 40.004 kHz according to the weak radio standard of the Radio Law. As S2, for example, since the time signal relay device 2 for transmitting to the radio-controlled timepiece installed indoors is provided, even if the signal electric field strength between the relay radio wave and the standard radio wave becomes closer,
The time of the radio-controlled timepiece 3 can be accurately and reliably corrected without misreading the code.

The time signal relay device 2 is connected to the radio signal S.
2 can be transmitted at all times,
In the present embodiment, transmission is performed once a day only at a very special time, for example, at 2:38 am, and the radio-controlled timepiece 3 receives a standard time radio signal S1 when receiving a standard time radio signal S1. 1 is controlled so that the receivable time zone of the standard time radio signal S1 from the time signal 1 and the receivable time zone of the radio signal S2 from the time signal relay device 2 are different, so that the radio signal S2 from the time signal relay device 2 interferes. Radio waves can be minimized.

The control circuit 34 determines whether or not the time can be set even in the normal correction mode. If the time can be set, the control circuit 34 corrects the pointer position. If not, the control circuit 34 turns on the light emitting element 36. Since the notification is performed, the radio wave reception state can be recognized at any time during operation.

[0072]

As described above, according to the present invention,
Even if the signal electric field strength between the relay radio wave and the standard radio wave becomes close, there is an advantage that the time can be accurately and reliably corrected without misreading the code.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a time correction system to which a time signal relay device according to the present invention is applied.

FIG. 2 is a diagram showing main part waveforms of a time correction system to which the time signal relay device according to the present invention is applied.

FIG. 3 is a diagram showing experimental results of a frequency difference and a field intensity difference that cause misreading of a time code.

FIG. 4 is a flowchart for explaining processing by a microcomputer in the time signal relay device according to the present invention.

FIG. 5 is a block diagram showing an embodiment of a signal processing circuit of the radio-controlled timepiece according to the present invention.

FIG. 6 is a cross-sectional view showing an overall configuration of an embodiment of a hand position detecting device for a radio-controlled timepiece according to the present invention.

FIG. 7 is a plan view of a main part of the pointer position detecting device according to the present invention.

FIG. 8 is a diagram showing an example of a forming pattern of a through hole of the hour wheel according to the present invention.

FIG. 9 is a diagram showing an example of a formation pattern of a light reflection surface of the rotation detection plate according to the present invention.

FIG. 10 is a flowchart illustrating a receiving operation and a time adjusting operation of the radio-controlled timepiece according to the present invention.

FIG. 11 is a timing chart for explaining a problem of the conventional time signal relay device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Radio wave transmission base (key station) 2 ... Time signal relay apparatus 20 ... Receiving antenna 21 ... Receiving RF amplifier 22 ... Detection circuit 23 ... Rectifier circuit 24 ... Integrator circuit 25 ... Microcomputer 26 ... Sine wave of frequency 40.004kHz Oscillator 27 ... Analog switch 28 ... Transmission RF amplifier 29 ... Transmission antenna 3 ... Radio time correction clock 30 ... Signal processing system circuit 31 ... Time radio signal reception system 32 ... Reset switch 33 ... Oscillation circuit 34 ... Control circuit 35 ... Drive circuit 36 ... Light emitting element as notification means 37 ... Buffer circuit 38 ... Drive circuit 100 ... Watch body 110 ... Lower plate 120 ... Middle plate 130 ... Upper plate 200 ... Second hand drive system 210 ... First stepping motor 220 ... Second fifth Car 220a: through hole 230: second hand wheel 230b: light reflecting surface 300: first reflection type light Sensor 400: minute hand drive system 410: second stepping motor 420: second fifth wheel 430 ... third wheel 440 ... minute hand wheel 440a: minute hand pipe 500: hour hand wheel 500d: through hole 600: minute wheel (middle) car) 700 ... manual correction shaft 800 ... rotation detection plate 800a ... light reflecting surface 900: second reflective optical sensor V _CC ... supply voltage C ₁ -C ₃ ... capacitor R ₁ to R ₈ ... resistance element

Claims (4)

[Claims] 1. A receiving means for receiving a standard time radio signal including a time code of a predetermined frequency, and a frequency of the standard time radio signal received by the receiving means is determined as a time code from the frequency of the standard time radio signal. A time signal relay device having transmission means for shifting the transmission within an impossible range. 2. A receiving means for receiving a standard time radio signal including a time code of a predetermined frequency, and a frequency of the standard time radio signal received by the receiving means is determined as a time code from the frequency of the standard time radio signal. A time signal repeater having transmission means for shifting the transmission time within an impossible range, and a radio-controlled timepiece that receives a transmission signal including a time code from the time signal repeater and corrects the time according to the input time code. Time correction system. 3. The radio-controlled timepiece compares the reception state of a radio signal with a predetermined reference range, sets the time when the reception state is within the reference range, and sets the reception state outside the reference range. 3. The time correction system according to claim 2, further comprising a control circuit that does not set the time when the time is in the range. 4. The time correction system according to claim 3, further comprising a notifying unit, wherein the control circuit causes the notifying unit to notify when the reception state of the radio signal is out of the reference range.