JP2004354304A - Time signal converter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a time signal converter which can convert a time cord format of a standard time electromagnetic wave signal. <P>SOLUTION: The time signal converter comprises an internal clock 151; a receiving system 11 which receives the standard time electromagnetic wave signal transmitted from a standard time electromagnetic wave transmitting station 2; a measured time which is measured by the internal clock 151 is corrected, based on the standard time electromagnetic wave signal received by the receiving system 11 and a time cord format information d_tcf_1 stored in a memory 13 which is set by a setting part 14; a control circuit 15 generates a time signal S15 for generating the standard time electromagnetic wave signal, based on the time cord format information d_tcf_2 stored in the memory 13, under setting by the measured time measured by the internal clock 151 and the setting part 14; a transmitter system 12 transmits the standard time electromagnetic wave signal corresponding to the time cord format information d_tcf_2 based on the time signal S15 generated by the control circuit 15. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a time signal conversion apparatus that transmits a standard time radio signal for a radio time correction clock that corrects the time by receiving a standard time radio signal, for example.
[0002]
[Prior art]
Conventionally, a radio-controlled timepiece that receives a signal including a time signal and corrects the time is known.
In addition, a radio-controlled timepiece installed in an area where the reception intensity of the signal is weak receives a signal including a time signal transmitted from a standard time transmitting station, and modulates and amplifies the time signal with a predetermined carrier wave. An output time signal relay device is known (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-5-33170 (Fig. 1-2)
[0004]
[Problems to be solved by the invention]
By the way, when a standard time transmitting station transmits a standard radio wave by modulating a standard time signal, the standard radio frequency and the standard radio wave transmission format (also referred to as a time code format) may be different for each standard time transmitting station.
A radio-controlled timepiece that corrects the time only by a signal transmitted in a predetermined time code format cannot correct the time appropriately even if it receives a signal transmitted in a different time code format.
Even when the standard time signal is modulated with a predetermined carrier wave and transmitted as in the conventional time relay device described above, the time correction format cannot be appropriately adjusted because the time code format is different in the above-described radio-controlled timepiece.
For this reason, a time signal converter capable of converting the time code format is desired.
[0005]
The present invention has been made in view of such circumstances, and an object thereof is to provide a time signal conversion device capable of converting a time code format of a standard time radio signal.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an aspect of the present invention provides a first radio timepiece for correcting a time by receiving a first standard time radio signal generated based on a first time code format. A time signal conversion device for transmitting a standard time radio signal, which receives a second standard time radio signal generated based on an internal clock and a second time code format different from the first time code format. Receiving means for correcting the time measured by the internal clock based on the second standard time radio signal received by the receiving means and the second time code format, and the time measured by the internal clock Control means for generating a time signal for generating the first standard time radio signal based on the first time code format, and generated by the control means And a transmitting means for transmitting the first standard time radio wave signal based on the time signal.
[0007]
According to an aspect of the present invention, the receiving unit receives a second standard time radio wave signal generated based on a second time code format different from the first time code format.
The control means corrects the time measured by the internal clock based on the second standard time radio signal received by the receiving means and the second time code format, and the time measured by the internal clock and the first time code A time signal for generating the first standard time radio signal is generated based on the format.
The transmission means transmits the first standard time radio signal based on the time signal generated by the control means.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The time signal conversion device according to the embodiment of the present invention includes, for example, a first radio wave correction timepiece that receives a first standard time radio wave signal generated based on a first time code format and corrects the time. The second time standard time signal generated based on the second time code format different from the time code format is received, the time measured by the internal clock is corrected, and the time measured by the internal clock A time signal for generating a first standard time radio signal is generated based on the first time code format, and a first standard time radio signal is generated based on the time signal and transmitted.
Hereinafter, it will be described in detail with reference to the drawings.
[0009]
FIG. 1 is a block diagram showing an embodiment of a time signal conversion system to which a time signal conversion device according to the present invention is applied.
As shown in FIG. 1, the time signal conversion system 100 according to the present embodiment includes a time signal conversion device 1, a standard time radio wave transmission station 2, and a radio wave correction clock 3.
The standard time radio wave transmitting station 2 has, for example, an atomic clock that measures the standard time, generates a standard time radio signal based on the standard time based on a predetermined time code format, and transmits the standard time radio signal.
[0010]
FIG. 2 is a diagram for explaining a first specific example of a time code format according to the present embodiment. FIG. 2A is a diagram showing a time code format transmitted from a JJY station in Japan other than 15 minutes per hour and 45 minutes per hour. FIG. 2B is a diagram showing a time code format transmitted from a Japanese JJY station at 15 minutes per hour and 45 minutes per hour. FIG.2 (c) is a figure which shows the transmission format of the standard time radio wave signal transmitted from a Japanese JJY station.
[0011]
The standard time radio wave transmission station 2 is operated, for example, under the National Research Institute of Communications and Communications (CRL), and transmits a standard radio wave with a frequency of 40 kHz or a frequency of 60 kHz based on a time code format as shown in FIG. To do.
For example, as shown in FIG. 2C, the standard time radio wave transmitting station 2 transmits a time code using a long wave, for example, 40 kHz or 60 kHz as a carrier wave.
[0012]
Specifically, the time code is composed of three types of signal patterns of 0, 1, and P, and is distinguished by a 100% amplitude period width in one signal pattern of 1 sec.
The modulation method is amplitude modulation with a maximum value of 100% and a minimum value of 10%, and the time codes 0, 1 and P are pulse signals with a maximum value of 100% of 800 ms, 500 ms and 200 ms, respectively.
The 55% value (the center of the 10% value and the 100% value) of the rising edge of the pulse is synchronized with the standard 1 second signal.
[0013]
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. This P code appears continuously only once at 59 seconds and 0 seconds in one frame, and the position where this P code appears continuously becomes the minute position.
[0014]
Further, as shown in FIGS. 2A and 2B, the transmission information is the accumulated date from the minute / hour / January 1st.
The time data is 1 frame per minute at 1 bit / second, and the minute information, time information, accumulated date information from January 1 and year information (last 2 digits of the year) are included in this frame as a BCD code. Including.
Further, the time data includes day information, call code, wave stop information, etc. assigned to each of 0 to 6 from Sunday to Saturday.
[0015]
For example, the radio-controlled timepiece 3 receives a standard time radio signal generated based on a time code format different from the time code format of the standard time radio wave transmitting station 2, and corrects the time based on the standard time radio signal.
[0016]
FIG. 3 is a diagram for explaining a second specific example of the time code format according to the present embodiment. FIG. 3A shows a time code format transmitted from the DCF77 station in Germany. FIG. 3B is a diagram showing a transmission format of a standard time radio signal transmitted from the DCF77 station in Germany.
For example, the radio-controlled timepiece 3 receives a standard time radio signal generated based on the time code format of the German station shown in FIG. 3 and corrects the time based on the standard time radio signal.
[0017]
For example, a standard time signal station DCF77 belonging to the PTB (Physicalich-technique Bundestantalt) of the National Metrology Institute in Germany transmits a standard time radio signal based on the time code format shown in FIG.
The frequency of the carrier wave is 77.5 kHz, and the time code format is 25% of the carrier wave amplitude for a period of 100 ms or 200 ms from the start of each second except the 59th second, as shown in FIG. Amplitude modulation is performed.
The decrease start point of the amplitude of the carrier wave is synchronized with the standard second signal. The absence of the second signal at the 59th second indicates the next minute signal.
The time codes 0 and 1 are pulse signals having an amplitude of 25% of 100 ms and 200 ms, respectively.
[0018]
As shown in FIG. 3 (a), the time data is 1 bit / second and one minute is one frame, and minute information, hour information, calendar information, day information, month information, and year information are included in this frame in the BCD code. including.
M is a minute marker (1 ms), R is a spare antenna used (200 ms), A1 is a notice of change of normal time and daylight saving time, Z1 and Z2 are indications of normal time and daylight saving time, and normal time (Z1: 100 ms, Z2: 200 ms) ), Daylight saving time (Z1: 200 ms, Z2: 100 ms), A1 is a leap second display (at 200 ms), S is a time code start bit (200 ms), and P1, P2 and P3 are even parity bits.
[0019]
As shown in FIG. 1, the time signal conversion apparatus 1 according to the present embodiment includes a reception system 11, a transmission system 12, a memory 13, a setting unit 14, a control circuit 15, and an internal clock 151.
The reception system 11, the transmission system 12, the memory 13, the setting unit 14, and the internal clock 151 are connected to the control circuit 15.
[0020]
The reception system 11 corresponds to the reception means according to the present invention, the transmission system 12 corresponds to the transmission means according to the present invention, and the control circuit 15 corresponds to the control means according to the present invention.
In the present embodiment, the control circuit 15 and the internal clock 151 are illustrated separately, but the present invention is not limited to this form. For example, the internal clock 151 may be included in the control circuit 15.
[0021]
The reception system 11 receives a standard time radio signal generated based on a predetermined time code format transmitted from the standard time radio wave transmission station 2, for example.
Specifically, the reception system 11 includes an antenna unit 111, an RF (Radio frequency) amplifier 112, and a detection unit 113 as main components, for example, as shown in FIG.
The antenna unit 111 can set resonance frequencies corresponding to a plurality of time code formats of the standard time radio signal, for example, and outputs the received standard time radio signal to the RF amplifier 112 as a signal S111. The antenna unit 111 can set a resonance frequency corresponding to at least a predetermined time code format transmitted from the standard time radio wave transmission station 2.
[0022]
The antenna unit 111 includes, for example, a ferrite antenna unit 111a and a resonance frequency setting unit 111b.
The ferrite antenna unit 111a has, for example, a reception directivity characteristic orthogonal to a transmission directivity characteristic of at least the antenna unit 121 of the transmission system 12 described later.
Specifically, the ferrite antenna unit 111a has a direction in which at least the reception gain as the reception directivity is orthogonal to the direction in which the transmission gain as the transmission directivity of the antenna unit 121 of the transmission system 12 is at a maximum.
The resonance frequency setting unit 111b has a plurality of capacitors.
[0023]
The ferrite antenna unit 111a and the resonance frequency setting unit 111b set a predetermined resonance frequency by selecting a plurality of capacitors based on the setting signal CTL1, for example.
[0024]
An RF (Radio frequency) amplifier 112 amplifies the high-frequency signal S111 from the antenna unit 111 and outputs the amplified signal 112 to the detection unit 113.
[0025]
The detection unit 113 performs detection processing based on the signal S112 from the RF amplifier 112, and outputs a signal S113 corresponding to the time code included in the standard time radio signal to the control circuit 15.
Specifically, for example, the detection unit 113 detects a standard time radio signal of a carrier wave having a frequency corresponding to a predetermined time code format based on the control signal CTL2, and responds to the time code included in the standard time radio signal. The signal S113 is output to the control circuit 15.
[0026]
The transmission system 12 transmits a standard time radio signal in a time code format that can be decoded by the radio-controlled timepiece 3 based on a time signal S15 generated by a control circuit 15 described later.
The transmission system 12 includes, for example, an antenna unit 121, an RF amplifier 122, an oscillation unit 123, and a modulation unit 124.
The antenna unit 121 can set, for example, a resonance frequency corresponding to a time code format having a plurality of standard times, can set a resonance frequency corresponding to at least a time code format decodable by the radio-controlled timepiece 3, and the RF amplifier 122. A standard time radio signal is transmitted based on the signal 122 output from the.
[0027]
The antenna unit 121 includes, for example, a loop antenna 121a and a resonance frequency setting unit 121b.
The loop antenna unit 121a has, for example, a transmission directivity characteristic that is orthogonal to at least the reception directivity characteristic of the antenna unit 111.
Specifically, the loop antenna unit 121a has a direction in which the transmission gain as the transmission directivity characteristic is orthogonal to the direction in which the reception gain as the reception directivity of the antenna unit 111 of the reception system 11 is at least orthogonal.
The resonance frequency setting unit 121b has a plurality of capacitors.
[0028]
The loop antenna unit 121a and the resonance frequency setting unit 121b set a predetermined resonance frequency by selecting a plurality of capacitors based on the setting signal CTL3, for example.
[0029]
The RF amplifier 122 amplifies the signal S124 output from the modulation unit 124 and outputs the amplified signal S124 to the antenna unit 121 as the signal S122.
The oscillating unit 123 outputs a signal S123 having a predetermined frequency to the modulating unit 124 based on the control signal CTL4 from the control circuit 15.
[0030]
Based on the time signal S15 generated by the control circuit 15, the modulation unit 124 modulates a carrier wave of the signal S123 having a predetermined frequency from the oscillation unit 123 and outputs the modulated signal to the RF amplifier 122 as a signal 124.
For example, the oscillating unit 123 receives a control signal CTL4 for generating a carrier wave having a frequency corresponding to a time code format that can be decoded by the radio-controlled timepiece 3 from the control circuit 15, and outputs a signal S123 having the frequency to the modulating unit 124. .
[0031]
The memory 13 stores, for example, information d_tcf related to the time code format and carrier frequency information d_f corresponding to the time code format d_tcf.
The memory 13 stores, for example, information d_tcf related to a plurality of time code formats, for example, time code format information d_tcf_1 to 3 and carrier frequency information d_f_1 to 3 corresponding to time code format information d_tcf1 to 3 respectively.
[0032]
For example, the time code format information d_tcf_1 includes information related to the time code format transmitted from the JJY station shown in FIG. 2, and the corresponding carrier frequency information d_f_1 includes information indicating the carrier frequency 40 kHz or 60 kHz. Including.
[0033]
For example, the time code format information d_tcf_2 includes information on the time code format transmitted from the DCF77 station shown in FIG. 3 described above, and the corresponding carrier frequency information d_f_2 includes information indicating the carrier frequency 77.5 kHz. .
[0034]
FIG. 4 is a diagram for explaining a third specific example of the time code format according to the present embodiment. FIG. 4A shows a time code format transmitted from a WWVB station in the United States. FIG. 4B is a diagram showing a transmission format of a standard time radio signal transmitted from a WWVB station in the United States.
[0035]
For example, the time code format information d_tcf_3 includes information on the time code format transmitted from the WWVB station shown in FIG. 4, and the corresponding carrier frequency information d_f_3 includes information indicating the carrier frequency 60 kHz.
[0036]
As shown in FIG. 4B, the time code format of the WWVB station is amplitude-modulated so that the amplitude of the carrier wave becomes −10 dB from the start of each second for a period of 200 ms, 500 ms, and 800 ms.
The decrease start point of the amplitude of the carrier wave is synchronized with the standard second signal.
The time codes 0, 1, and P are pulse signals having an amplitude of −10 dB of 200 ms, 500 ms, and 800 ms, respectively.
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. This P code appears continuously only once at 59 seconds and 0 seconds in one frame, and the position where this P code appears continuously becomes the minute position.
[0037]
As shown in FIG. 4 (a), the time data is 1 bit / second, and one minute is one frame. Within this frame, minute information, hour information, date information, UT1 index (SIGN), UT1 correction information (CORRECTION) ), Leap year information (lyib: LEAP YEAR INDICATOR BIT), warning information (lswd: leap second warning bit), daylight saving time information (daylight saving time bits), and the like.
[0038]
The setting unit 14, for example, the time code format of the standard time radio signal received by the reception system 11 and the frequency of the carrier wave corresponding thereto, and the time code format of the standard time radio signal transmitted from the transmission system 12 and the carrier wave corresponding thereto. The frequency is set and output to the control circuit 15 as a signal S14, for example. For example, the control circuit 15 sets the time code format of the reception system 11 and the transmission system 12 and the corresponding carrier frequency based on the signal S14.
[0039]
For example, the control circuit 15 corrects the time measured by the internal clock 151 based on the standard time radio signal received by the reception system 11 and the time code format information d_tcf stored in the memory 13.
[0040]
Further, the control circuit 15 generates a time signal for generating a standard time radio signal that can be decoded by the radio-controlled timepiece 3 based on the time measured by the internal clock 151 and the time code format information d_tcf stored in the memory 13. S15 is generated and output to the transmission system 12.
[0041]
The control circuit 15 also includes, for example, the antenna unit 111, a standard time radio signal received with a resonance frequency corresponding to the time code format of the standard time radio transmission station 2, and a corresponding time code format d_tcf stored in the memory 13. Based on this, the time measured by the internal clock 151 is corrected.
The internal clock 151 has, for example, a crystal oscillator that generates a signal having a predetermined frequency, and measures the time measured based on the signal. For example, the internal clock 151 measures second information, minute information, hour information, day information, month information, year information, and the like.
[0042]
FIG. 5 is a flowchart for explaining the operation of the time signal conversion system to which the time signal conversion apparatus according to the present invention shown in FIG. 1 is applied. The operation of the time signal converter will be mainly described with reference to FIGS.
For example, the radio-controlled timepiece 3 receives the standard time radio signal generated based on the carrier code frequency of 77.5 kHz and the time code format shown in FIG. The standard time radio wave transmission station 2 generates and transmits a standard time radio wave signal based on the carrier wave frequency of 40 kHz and the time code format shown in FIG.
For this reason, the radio-controlled timepiece 3 is in a state where the standard time radio signal transmitted from the standard time radio wave transmission station 2 cannot be decoded.
[0043]
In step ST1, the time signal converter 1 is turned on.
The time code format of the standard time radio signal received by the receiving system 11 and the corresponding carrier frequency 40 kHz and the time code format of the standard time radio signal transmitted from the transmission system 12 and the corresponding carrier frequency by the setting unit 14. 77.5 kHz is set and output to the control circuit 15 as a signal S14.
[0044]
The control circuit 15 outputs a control signal CTL1 to the antenna unit 111 based on the signal S14, and the ferrite antenna unit 111a and the resonance frequency setting unit 111b select, for example, a plurality of capacitors based on the setting signal CTL1 to 40 kHz. Set the resonance frequency.
[0045]
The control circuit 15 outputs the control signal CTL3 to the antenna unit 121 based on the signal S14, and the loop antenna unit 121a and the resonance frequency setting unit 121b select a plurality of capacitors based on the setting signal CTL3, for example. To set a resonance frequency of 77.5 kHz.
[0046]
In step ST2, the control circuit 15 causes the reception system 11 to receive a standard time radio signal. The antenna unit 111 outputs a standard time radio wave signal transmitted from the standard time radio wave transmission station 2 received at a resonance frequency corresponding to the set time code format to the RF amplifier 112 as a signal S111.
The RF amplifier 112 amplifies the signal S111 and outputs it to the detection unit 113 as the signal S112.
Based on the signal S112 and the control signal CTL2, the detection unit 113 detects a standard time radio signal of a carrier wave having a frequency corresponding to the second time code format of the standard time radio wave transmission station 2 and outputs it to the control circuit 15 as a signal S113. Output.
[0047]
In the control circuit 15, the signal S113 is decoded to extract time information based on the time code format information d_tcf_1 set by the setting unit 14 and stored in the memory 13, and the internal clock 151 counts time based on the time information. Correct the clock time.
[0048]
In step ST3, the internal clock 151 increments the clock time.
[0049]
In step ST4, the control circuit 15 determines whether or not the time measured by the internal clock 151 is a preset reception time of the standard time radio signal, for example, 2:36 am in a good reception state. If it is time, as in step ST2, the standard time radio signal from the standard time radio wave transmission station 2 is received, the internal clock 151 is corrected (ST5), and the process proceeds to step ST6.
[0050]
On the other hand, in the determination of step ST4, the control circuit 15 proceeds to the process of step ST6 even when the time measured by the internal clock 151 is not the preset reception time of the standard time radio signal.
[0051]
In step ST6, the control circuit 15 uses the time measured by the internal clock 151 and the time signal for generating the standard time radio signal based on the time code format d_tcf_2 stored in the memory 13 set by the setting unit 14. S15 is generated.
[0052]
The control circuit 15 outputs a control signal CTL4 for generating a carrier wave having a frequency of 77.5 kHz corresponding to the time code format d_tcf_2 stored in the memory 13 and set in the oscillation unit 123 by the setting unit 14. The oscillation unit 123 outputs a signal S123 having the frequency to the modulation unit 124 based on the signal CTL4.
[0053]
The modulation unit 124 modulates the carrier wave of the signal S123 having a predetermined frequency from the oscillation unit 123 based on the time signal S15, and outputs the modulated signal to the RF amplifier 122 as a signal 124. The RF amplifier 122 amplifies the signal S124 and outputs the signal S122 to the antenna unit 121.
The antenna unit 121 transmits the standard time radio wave signal to the radio wave correction watch 3 at the set resonance frequency and the time code format shown in FIG. 3 based on the signal S122, and returns to the process of step ST3.
The radio-controlled timepiece 3 corrects the display time based on the standard time radio signal transmitted from the time signal conversion device 1.
[0054]
As described above, the internal clock 151, the reception system 11 that receives the standard time radio signal transmitted from the standard time radio wave transmission station 2, the standard time radio signal received by the reception system 11, and the setting unit 14 The time measured by the internal clock 151 based on the time code format information d_tcf_1 set and stored in the memory 13 is corrected, and the time measured by the internal clock 151 and set by the setting unit 14 are stored in the memory 13. A control circuit 15 for generating a time signal S15 for generating a standard time radio wave signal based on the time code format information d_tcf_2, and a standard time corresponding to the time code format information d_tcf_2 based on the time signal S15 generated by the control circuit 15 Since the transmission system 12 for transmitting the radio signal is provided, the standard time radio signal It may convert the time code format.
[0055]
Further, the receiving system 11 is provided with an antenna unit 111 capable of setting a resonance frequency corresponding to the time code format, and the transmission system 12 is provided with an antenna unit 121 capable of setting a resonance frequency corresponding to the time code format. The time measured by the internal clock 151 is corrected based on the standard time radio signal received with the resonance frequency corresponding to the time code format set by the antenna unit 111 and the time code format information d_tcf_1 stored in the memory 13, An antenna unit in which the time signal S15 is generated based on the time measured by the clock 151 and the set time code format d_tcf_2, and the transmission system 12 sets the resonance frequency corresponding to the time code format d_tcf_2 based on the time signal S15. 121 to mark And it transmits the time radio signals, it is possible to transmit the standard time signal to the radio-controlled timepiece 3 efficiently.
[0056]
For example, when a transmission antenna with a core and a transmission antenna with a core whose reception directivity characteristics and transmission directivity characteristics are in the same direction are provided close to each other, interference occurs and the reception performance deteriorates, compared to the transmission system 12 according to the present embodiment. Since the antenna unit 121 has at least a transmission directivity characteristic orthogonal to the reception directivity characteristic of the antenna unit 111 of the reception system 11, it is possible to transmit a standard time radio wave signal without deteriorating the reception performance of the reception system 11. .
[0057]
Note that the present invention is not limited to the present embodiment, and various suitable modifications can be made.
In the present embodiment, for example, the control circuit 15 sets the resonance frequency of the resonance frequency setting units 111b and 121b with the control signals CTL1 and CTL3 by the setting unit 14, but the present invention is not limited to this mode. The resonance frequencies of the resonance frequency setting units 111b and 121b may be set directly without using the control circuit 15.
[0058]
In the present embodiment, the antenna units 111 and 121 are provided in the reception system 11 and the transmission system 12, respectively, but the present invention is not limited to this configuration. For example, one antenna may be shared. An antenna switching unit that switches between the antenna unit 111 of the reception system 11 and the antenna unit 121 of the transmission system 12 may be provided. By doing so, it is possible to select the reception directivity characteristic and the transmission directivity characteristic in the optimum transmission / reception state.
[0059]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the time signal converter which can convert the time code format of a standard time radio wave signal can be provided.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of a time signal conversion system to which a time signal conversion device according to the present invention is applied.
FIG. 2 is a diagram for explaining a first specific example of a time code format according to the present embodiment. (A) is a figure which shows the time code format transmitted from the JJY station of Japan other than 15 minutes / hour and 45 minutes / hour. (B) is a diagram showing a time code format transmitted from a Japanese JJY station at 15 minutes per hour and 45 minutes per hour. (C) is a figure which shows the transmission format of the standard time radio wave signal transmitted from a Japanese JJY station.
FIG. 3 is a diagram for explaining a second specific example of a time code format according to the present embodiment. (A) is a figure which shows the time code format transmitted from the DCF77 station of Germany. (B) is a figure which shows the transmission format of the standard time radio signal transmitted from the DCF77 station of Germany.
FIG. 4 is a diagram for explaining a third specific example of a time code format according to the present embodiment. (A) is a figure which shows the time code format transmitted from the WWVB station of the United States of America. (B) is a figure which shows the transmission format of the standard time radio wave signal transmitted from the WWVB station of the United States of America.
5 is a flowchart for explaining the operation of the time signal conversion system to which the time signal conversion apparatus according to the present invention shown in FIG. 1 is applied.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Time signal conversion apparatus, 2 ... Standard time radio wave transmission station, 3 ... Radio wave correction clock, 11 ... Reception system, 12 ... Transmission system, 13 ... Memory, 14 ... Setting part, 15 ... Control circuit, 151 ... Internal clock, DESCRIPTION OF SYMBOLS 100 ... Time signal conversion system, 111 ... Antenna part, 111a ... Ferrite antenna part, 111b ... Resonance frequency setting part, 112 ... RF (Radio frequency) amplifier, 113 ... Detection part, 121 ... Antenna part, 122 ... RF amplifier, 123 ... oscillator, 124 ... modulator.

Claims (5)

A time signal conversion device for transmitting a first standard time radio signal for a radio correction timepiece that receives a first standard time radio signal generated based on a first time code format and corrects the time. ,
An internal clock,
Receiving means for receiving a second standard time radio wave signal generated based on a second time code format different from the first time code format;
The time measured by the internal clock is corrected based on the second standard time radio signal received by the receiving means and the second time code format, and the time measured by the internal clock and the first time Control means for generating a time signal for generating the first standard time radio signal based on a code format;
A time signal conversion apparatus comprising: a transmission unit that transmits the first standard time radio wave signal based on the time signal generated by the control unit. The receiving means includes a first antenna unit capable of setting a resonance frequency corresponding to at least the second time code format,
The transmission means includes a second antenna unit capable of setting a resonance frequency corresponding to at least the first time code format,
The control means is configured so that the internal clock is based on the second standard time radio signal received by the first antenna unit with a resonance frequency corresponding to the second time code format and the second time code format. Correcting the time measured to time, generating the time signal based on the time measured by the internal clock and the first time code format,
2. The transmission unit according to claim 1, wherein the transmission unit transmits the first standard time radio wave signal from a second antenna unit in which a resonance frequency corresponding to the first time code format is set based on the time signal. Time signal converter. The time signal conversion device according to claim 2, wherein the second antenna unit has a transmission directivity characteristic orthogonal to at least the reception directivity characteristic of the first antenna unit. The said transmission means modulates the carrier wave of the frequency corresponding to a said 1st time code format based on the time signal which the said control means produced | generated, The said 1st standard time radio wave signal is transmitted. The time signal converter according to any one of the above. The receiving means detects the second standard time radio signal of a carrier wave having a frequency corresponding to the second time code format;
5. The time signal converter according to claim 1, wherein the control unit corrects a time measured by the internal clock based on a result of detection by the receiving unit and the second time code format.

Images