JP2005164318A - Time correction information output device, automatic time correction timepiece, time server, and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a time correction information output device, an automatic time correction timepiece, a time server, and an electronic apparatus, with enhanced accuracy by adding position-based time correction to time correction of a radio wave timepiece. <P>SOLUTION: This device comprises a reception part 2 for receiving a standard time radio wave having time information, a time information acquisition part 3 for outputting time data corresponding to the time information in the radio wave received by the reception part 2, a position information input part 4 for therein inputting position information, and a position information processing part 5 for calculating a distance between two points based on a first group of position data, with the inputted first group of position data referred to as the first group of position data, and on a second group of position data which are position information on a transmission base station for transmitting a previously stored standard time radio wave to calculate a time correction amount corresponding to the distance. Further, this device comprises a time correction processing part 6 for correcting a reference clock and calendar data for the timepiece by using the time correction amount calculated by the processing part 5 and the time data outputted from the acquisition part 3, and outputting them as corrected time data. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a time correction information output device, and more particularly to a time correction information output device that corrects a time according to a position when the time is adjusted by receiving a standard time radio wave in Japan standard time.

  In recent years, accurate radio timepieces that receive and display standard time radio waves in Japan standard time have become less expensive and have become widespread in ordinary households. Under such circumstances, a method has been proposed for receiving a standard time radio wave transmitted in Japan Standard Time more accurately and providing a highly accurate radio timepiece.

  For example, using a PLL circuit, a clock reference signal is output from the received standard electrical signal, and the signal is injected into the clock crystal unit. It has been proposed to synchronize with a received standard electrical signal by generating a phase synchronization of a transmission signal wave output from the clock reference signal to generate highly accurate time information (Patent Document 1). .

  In addition, a time code signal included in a standard time radio wave is received as first time information, and time information included in a GPS (Global Positioning System) radio wave is received as second time information. Then, the accuracy of the time information acquired from the standard time radio wave is corrected with the time information acquired from the GPS radio wave, the corrected time information is output as time data, the internal clock of the control circuit of the clock driving circuit is corrected, and the time display There has also been a proposal to display on an apparatus (Patent Document 2).

JP 2001-42073 A JP 2001-51077 A

However, according to Patent Document 2, a long wave receiver and control circuit for receiving standard time radio waves as first time information, and GPS reception for receiving time information included in GPS radio waves as second time information. Machine and a control circuit are required. In particular, since the device necessarily includes a GPS receiver, there is a problem that the power consumption of the GPS receiver and the control circuit increases. In addition, the GPS receiver and the control circuit are expensive, and there is a problem that the cost of the device increases. In addition, when the GPS receiver and the control circuit are mounted, there is a problem that the device becomes large.
The present invention has been made in view of the above-described problems. A time correction information output device, an automatic time correction clock, and a time which are improved in accuracy by adding time correction based on position to time correction of a radio timepiece. The purpose is to provide servers and electronic devices.

In order to solve the above-described problems and achieve the object, a time correction information output device of the present invention includes a receiving unit that receives a standard time radio wave having time information, and the time information of the standard time radio wave received by the receiving unit. A time information acquisition unit that outputs time data corresponding to the position information, a position information input unit that inputs position information, and the input position information as first position data. The first position data is stored in advance. A position information processing unit that calculates a time correction amount corresponding to the distance between the two points based on the second position data that is the position information of the transmitting base station that transmits the standard time radio wave, and the position information processing unit Using the time correction amount calculated by the above and the time data output from the time information acquisition unit, the clock reference clock and calendar data are corrected and output as corrected time data. Characterized in that and a time adjustment process unit.
According to the present invention, the reception unit receives standard time radio waves having time information, and the time information acquisition unit outputs time data corresponding to the time information of the standard time radio waves. When the current position is input by the position information input unit, the position information processing unit converts the current position into position data. Further, the distance between the two points is obtained from the position data converted by the position information processing unit and the position data of the transmitting base station that transmits the standard time radio wave stored in advance. Then, it is possible to calculate the delay time (propagation delay time) of the arrival time of the standard time radio wave that is the time correction amount of the standard time radio wave corresponding to the distance between the two points. Then, the time correction processing unit generates an accurate reference clock for the clock from the time correction amount and regular one-second data from the standard time radio wave, which is the time data output from the time information acquisition unit. Is possible. Then, with the time data acquired from the time code that is the time information of the standard time radio wave, the calendar data of the internal clock held in the time correction processing unit of the time correction information output device is synchronized with the generated reference clock for the clock. , Correction can be corrected. As a result, it is possible to add time correction based on position to time correction using standard time radio waves, and it is possible to perform time correction with high accuracy.

According to a preferred aspect of the present invention, the position information input to the position information input unit is latitude and longitude.
According to the present invention, by inputting latitude and longitude into the position information input unit, necessary position information can be output to the position information processing unit, and correct propagation delay time can be corrected.

According to a preferred aspect of the present invention, the position information input to the position information input unit is a map code.
The map code (R) is a numeric code assigned on the map so that all positions in Japan can be specified with a maximum of 10 digits. Currently, it has been widely used for location information services such as car navigation and mobile phones.
According to the present invention, by inputting the map code to the position information input unit, necessary position information can be output to the position information processing unit, and correct propagation delay time can be corrected. The map code can easily input necessary position information, and accurate time correction is possible.

According to a preferred aspect of the present invention, the position information input to the position information input unit is an address.
According to the present invention, by inputting the most common address to the position information input unit, the position information processing unit converts the address into position data using a predetermined algorithm and conversion table. Time correction is performed.

According to a preferred aspect of the present invention, the position information input to the position information input unit is a zip code.
According to the present invention, by inputting a general zip code to the position information input unit, the zip code is converted into position data by the position information processing unit using a predetermined algorithm and conversion table. However, what is generally indicated by a zip code does not specify a private house such as an address, but indicates a certain area. The propagation delay time of the standard time radio wave due to the wide range is negligible and there is no problem. In addition, in a business establishment that has received an individual postal code, by inputting the individual postal code, it is possible to accurately identify the position and perform accurate time correction.

According to a preferred aspect of the present invention, the position information input to the position information input unit is a telephone number.
According to the present invention, by inputting the telephone number into the position information input unit, the position information processing unit converts the telephone number into position data using a predetermined algorithm and conversion table, and accurate time correction is performed based on the position data. Done.

According to a preferred aspect of the present invention, the position information input unit has an input terminal to which a GPS receiver, a mobile phone or a PHS can be connected.
According to the present invention, since the position information input unit has the input terminal, it is possible to connect a GPS receiver, a mobile phone or a PHS. Then, the position information can be input by exchanging signals between the connected GPS receiver, mobile phone or PHS and the position information input.

Further, according to a preferred aspect of the present invention, the position information input to the position information input unit is position information of latitude and longitude in the GPS receiver connected to the input terminal, and in the mobile phone or the PHS Is the latitude / longitude of the nearest communication base station to communicate or the position information of the map code.
According to the present invention, the GPS receiver connected to the input terminal can receive GPS radio waves and transmit latitude and longitude information, which is position information of the current location, to the position information input unit. The mobile phone or PHS (Personal Handyphone System) connected to the input terminal can send the latitude / longitude of the nearest communication base station currently used for communication or the location information of the map code to the location information input unit. become.

According to a preferred aspect of the present invention, the position information is position information other than latitude and longitude and a map code, and the position information processing unit converts the position information into first position data consisting of latitude and longitude or a map code. A storage unit for storing a conversion table to be converted is provided, and the time correction amount is calculated using the first position data and the second position data including latitude and longitude or a map code.
According to the present invention, the position information of each type other than the latitude / longitude and map code input to the position information input unit is converted into numerical data of latitude / longitude or numerical data of map code as the first position data. In addition, a conversion table is used. Therefore, even if each type of position information is input, it can be converted into latitude / longitude or map code position data by the conversion table, and the distance between the two points is obtained. Then, it is possible to calculate the delay time (propagation delay time) of the arrival time of the standard time radio wave that is the time correction amount of the standard time radio wave corresponding to the distance between the two points. The conversion table is stored in the storage unit. When converting the input position information into position data, a conversion table corresponding to the type of the input position information can be read from the storage unit.

According to a preferred aspect of the present invention, the position information is position information other than latitude and longitude, and the position information processing unit stores a conversion table for converting the position information into first position data consisting of latitude and longitude. And the time correction amount is calculated using the first position data and the second position data including latitude and longitude.
According to the present invention, the conversion table is used to convert each type of position information other than the latitude and longitude input to the position information input unit into numerical data of latitude and longitude as the first position data. Therefore, even if each type of position information is input, it can be converted into position data of latitude and longitude by the conversion table, and the distance between the two points is obtained. Then, it is possible to calculate the delay time (propagation delay time) of the arrival time of the standard time radio wave that is the time correction amount of the standard time radio wave corresponding to the distance between the two points. The conversion table is stored in the storage unit. When converting the input position information into position data, a conversion table corresponding to the type of the input position information can be read from the storage unit.

According to a preferred aspect of the present invention, the position information processing unit calculates a time correction amount corresponding to the distance between the two points based on the first position data and the latitude and longitude that are the second position data. When calculating, it is characterized in that a correction of distance is added.
According to the present invention, when calculating the time correction amount corresponding to the distance between two points between the transmission base station of the standard time radio wave and the input position, by adding a correction of the distance using a spherical trigonometry or the like, A time correction amount corresponding to an accurate distance between two points can be obtained. As a result, highly accurate time correction is possible.

Further, according to a preferred aspect of the present invention, the apparatus has a storage unit that stores the time correction amount, and the position information processing unit is output from the time correction amount read from the storage unit and the time information acquisition unit. The reference clock and calendar data for the clock are corrected using the time data.
According to the present invention, by providing the storage unit for storing the time correction amount, the time correction amount stored in the storage unit is read out at a predetermined time. Then, it becomes possible to correct the clock reference clock and calendar data using the read time correction amount and the time data output from the time acquisition unit. Therefore, the user does not need to input to the position information input unit except when changing the position information, and the complexity of the input is reduced.

According to a preferred aspect of the present invention, there is provided a time correction information output device and a clock unit for displaying a time corresponding to the correction time based on the correction time data output from the time correction information output device. It is characterized by.
According to the present invention, the time corrected with high accuracy can be displayed on the clock unit. In addition, it is possible to provide a highly accurate automatic time correction clock.

According to a preferred aspect of the present invention, there is provided a time server comprising a time correction information output device.
According to the present invention, it is possible to connect to a network and use as a time server equipped with a time correction information output device. Therefore, it is possible to distribute a highly accurate standard time to a PC (Personal Computer) and other electronic devices on a network to which a time server is connected.

According to a preferred aspect of the present invention, an electronic apparatus comprising a time correction information output device.
According to the present invention, it is possible to use a time correction information output device as a built-in clock, and to provide an electronic device capable of correcting the time of various electronic devices such as a PC, a PDA (Personal Digital Assistance), a digital camera with high accuracy It becomes possible.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 2 is a schematic configuration diagram when connected to a network using a time server equipped with the time correction information output apparatus of the present invention. The schematic configuration and operation will be described with reference to FIG.
A server 70 that provides various information to the client and various electronic devices such as the PC 71 that is the client are connected to a network, and the time server 7 is connected to the network.
The time server 7 can distribute highly accurate standard time to various electronic devices such as the server 70 and the PC 71 on the network.

Until now, the electronic device has read the data of the clock IC built in the main body, and used it as the time of the electronic device. However, this timepiece IC is not accurate because of a large error. Therefore, by using the time server 7, all electronic devices connected to the network are corrected to the standard time with high accuracy.
In addition, the use of the time server 7 particularly in a network via the Internet can deliver an accurate time as proof as time authentication in electronic commerce or settlement in which the accuracy of the time is a problem. It is possible to record accurate time with the server 70, which is very effective.

Next, the time correction information output device mounted in the time server 7 will be described.
FIG. 1 is a schematic configuration diagram of a time correction information output device of the present invention. A schematic configuration will be described with reference to FIG.

  The time correction information output device 1 includes a receiving unit 2 that receives a standard time radio wave that is transmitted in Japan standard time, and a time information acquisition unit 3 that outputs a signal output from the receiving unit 2 as time code data. Moreover, the position information input part 4 for inputting the position information of the present location of the time correction information output device 1 is provided. Then, the position information input by the position information input unit 4 is converted into position data (first position data), and 2 of the position data and the position data (second position data) of the transmission base station of the standard time radio wave. A position information processing unit 5 that calculates a distance between points, calculates a propagation delay time of a standard time radio wave based on the distance, and outputs a time correction amount is provided. Then, the time correction processing unit 6 generates a clock serving as a clock reference based on the time code data output from the time information acquisition unit 3 based on the time correction amount output from the position information processing unit 5. The current time is corrected in synchronization with a reference clock for a clock, and the corrected time is output as corrected time data.

Here, each component will be described in detail.
The receiver 2 receives the standard time radio wave on which the time information is superimposed by the antenna 20, and the received standard time radio signal is amplified by the amplifier circuit 21. Then, only the desired frequency component is extracted from the amplified standard time radio signal by the band-pass filter 22, and the standard time radio signal is smoothed and demodulated by the demodulation circuit 23.
The time information acquisition unit 3 includes a time information acquisition circuit 30, has a decoding function, and outputs the standard time radio signal output from the demodulation circuit 23 as time code data.
Further, the series of operations described above are operated by a control signal from the time correction processing unit 6 described later.

As the position information, the current position is input from the position information input circuit 40 of the position information input unit 4. Further, the position information processing unit 5 executes a program for converting the position information output from the position information input circuit 40 into numerical data of latitude / longitude or map code, and the distance and the standard time radio wave propagation delay time described later. A CPU (Central Processing Unit) 50 that executes and controls the calculation, and a storage unit 51 that stores a conversion table for converting position information into numerical data of latitude and longitude.
The position information output from the position information input circuit 40 is input to the position information processing unit 5. Under the control of the CPU 50, the input position information is converted into latitude / longitude or numerical data of a map code by a conversion table and program processing in the storage unit 51. Then, based on the position data of the transmission base station for standard time radio waves stored in the storage unit 51 and the input current position data after conversion, between the two locations of the transmission base station for standard time radio waves and the input current position. Calculate the geographical distance. Then, the propagation delay time of the standard time radio wave from the transmission base station to the current position is calculated from the calculated distance data and the propagation speed of the standard time radio wave. The calculated propagation delay time is a time correction amount, and is output to the time correction processing unit 6 as time correction data. The propagation delay time is calculated from a control signal from the CPU 60 of the time correction processing unit 6 described later and a standard time radio signal from the time information acquisition circuit 30.

In the present embodiment, the latitude / longitude and map code numerical data are used as the position data, so that the range of application of the numerical data is widened and the convenience of the time correction information output device 1 is improved.
In addition, when each type of position information is input, the CPU 50 of the position information processing unit 5 uses the conversion table read from the storage unit 51 to store the position information when the position information is not latitude / longitude or map code. Is converted into position data consisting of latitude / longitude or map code. Therefore, the user can input each type of position information, and convenience is improved. The storage unit 51 includes a plurality of conversion tables corresponding to position information such as addresses, postal codes, and telephone numbers.

  The map code is a numeric code assigned on the map so that all positions in Japan can be specified by a maximum of 10 digits. Specifically, it is composed of blocks and units that are further finely divided from zones in which Japan is roughly divided into meshes. The zone, block, and unit numbers are displayed in 10-digit numbers that are arranged in order.

  The time correction processing unit 6 is configured to include a transmission circuit, a frequency dividing circuit, and the like for transmitting a reference signal transmission source 61 such as a crystal resonator at a high frequency. Then, the CPU 60 that controls the entire time correction information output device 1 and the program stored in the ROM (Read Only Memory) 62 by the control signal of the CPU 60 rewrites the data in the RAM (Random Access Memory) 63. And so on.

Based on the time correction data output from the position information processing unit 5, the CPU 60 in the time correction processing unit 6 synchronizes and generates a clock serving as a clock reference based on the time code data output from the time information acquisition unit 3. Then, by executing the program in the ROM 62, the second of the calendar data in the RAM 63 is counted up every second. Further, the time correction is performed by rewriting the calendar data in the RAM 63 in synchronization with the generated clock reference clock by the time code data from the time information acquisition circuit 30. Then, the corrected time is output as corrected time data.
The time correction processing unit 6 has a storage unit in the RAM 63 for storing time correction data output from the position information processing unit 5. Therefore, when the standard time radio wave is received and the time is adjusted at a predetermined time controlled by the CPU 60, the stored time correction data can be read from the RAM 63 and the time can be adjusted. Therefore, it is not necessary for the user to input to the position information input unit 4 except when changing the position information, and the complexity of the input is reduced, and accurate time correction can be automatically performed at a predetermined time. Become.

With the configuration of the first embodiment, when the standard time radio wave is received and correct time adjustment is performed, the propagation of the standard time radio wave according to the distance between the two points of the standard time radio wave transmission base station and the current position of the user By adding the time correction with the delay time taken into account, the time can be corrected with higher accuracy. In addition, since it is only necessary to input position information, highly accurate time correction can be easily performed. Further, since it is not necessary to mount a GPS receiver or the like on the time correction information output device 1, the power consumption is small, and when the power source is a battery, the battery life can be extended.
The function of the CPU 50 of the position information processing unit 5 can be assigned to the CPU 60 of the time correction processing unit 6.

Next, an input method and configuration to the position information input unit 4 will be described with reference to FIG.
There are two input methods to the position information input unit 4, and one is a method in which an operation unit such as a keyboard 41 is provided to input position information. The other is provided with an input terminal 43 for connecting an electronic device 42 such as a GPS receiver, a mobile phone, and a PHS, and the electronic device 42 is connected to communicate with the position information input unit 4 to obtain necessary position information. It is a method to input. The time server 7 is configured to be able to use either input method.

FIG. 3A is a configuration explanatory diagram in which a keyboard 41 is provided in the position information input unit 4.
The user can use the keyboard 41 as an operation unit to input position information such as latitude / longitude, map code, address, postal code, and telephone number.
The position information input to the position information input unit 4 via the keyboard 41 is output to the position information processing unit 5, and the latitude / longitude numerical data or map code is displayed by a conversion table corresponding to each type of position information input. It is converted to numerical data and moves on to the next processing.

  As shown in FIG. 3B, the keyboard 41 is actually provided on the exterior surface of the time server 7. The keyboard 41 also serves as an operation unit for inputting to perform operations other than the position information input of the time server 7.

FIG. 3C is an explanatory diagram of a configuration in which an input terminal 43 is provided in the position information input unit 4 and an electronic device 42 such as a GPS receiver, a mobile phone, or a PHS is connected.
A GPS receiver, a mobile phone, and a PHS electronic device 42 are connected by a connection cable 44 using an input terminal 43 provided in the position information input unit 4. By connecting a GPS receiver, a mobile phone, and a PHS electronic device 42, signals are exchanged with the electronic device 42 by a program in the CPU 50 of the position information processing unit 5 and a conversion table in the storage unit 51. The position data of the electronic device 42 is taken out. The extracted position data is transferred to the next processing.
As specific position information, in the GPS receiver, the latitude and longitude obtained by receiving a GPS signal from a GPS satellite. And in a mobile phone and PHS, it is the latitude / longitude of the nearest communication base station with which they are communicating, or the positional information of a map code.

As shown in FIG. 3D, the input terminal 43 is actually provided on the exterior surface of the time server 7. The electronic device 42 is connected to the input terminal 43 using a connection cable 44.
By realizing such an input method, the operability of the time server 7 is improved.

The keyboard 41 described above may be configured such that the position information input unit 4 is provided with an input terminal 43 and is connected to the time server 7 via the input terminal 43 via the connection cable 44 in the same manner as the electronic device 42.
In addition, as a location information input method, a latitude / longitude, a map code, an address, a zip code using an input operation unit such as a GPS receiver connected using the input terminal 43, a mobile phone, and a keyboard mounted on the PHS are used. You may make it input a telephone number. In this case, the electronic device 42 connected to the time server 7 needs a program for communication and data processing. However, the selection range of the user's position information input means is expanded, and the operability of the time server 7 is improved.

  3A and 3C, the configuration after the position information processing unit 5 is the same as that in FIG.

Next, a description will be given of a method of adding correction when the position information processing unit 5 calculates the distance between two points from the position data of the transmission base station of standard time radio waves and the input position data.
When the latitude is the geographic latitude, it is necessary to convert to the geocentric latitude, and can be converted to the geocentric latitude by the equations (1) and (2).
Here, the position of the transmission base station for standard time radio waves is defined as point A, and the current position to be input is defined as point B. Here, the latitude of the point A is φ′A, the longitude is λA, the latitude of the point B is φ′B, and the longitude is λB. Note that φ′A and φ′B are geographical latitudes.
When the geocentric latitude of point A is φA and the geocentric latitude of point B is φB, the calculation formula is
φA ＝ φ′A-11.55′sin (2 × φ′A) …… (1)
φB = φ'B-11.55'sin (2 × φ'B) (2)
It becomes.
Next, from the formula of spherical trigonometry,
cosΔ = cosφAcosφBcos (λA−λB) + sinφAsinφB ...... (3)
By calculating the above, cosΔ is obtained, and the value of Δ (rad) is obtained. And
(Distance between two points AB) = 6369 (km) x Δ (4)
Thus, the accurate distance between two points can be obtained.
Here, 6369 (km) is the equator radius of the earth.
In the case where the latitude is expressed by the geocentric latitude, the accurate distance between the two points can be obtained from the equations (3) and (4).
In this way, by correcting the distance, a more accurate distance between two points can be obtained, so that a highly accurate propagation delay time can be calculated. Thereby, highly accurate time correction becomes possible.

Next, the time code superimposed on the standard time radio wave in Japan standard time will be described.
FIG. 4 is a diagram showing a time code format of standard time radio waves. In this time code format, one signal is transmitted every second, and is configured as one record in 60 seconds.
As shown in FIG. 4, the items included in the time code format of the standard time radio signal include the minute of the current time, the hour, the day of the current year since January 1, the year (the last two digits of the year), the day of the week and the leap. Each digit data of seconds is included. The value of each item is composed of a combination of numerical values (bit data) assigned every second, and ON / OFF of this combination is determined from the type of signal.

  As shown in FIG. 5, there are three types of signals transmitted as standard time radio signals, and signals representing “1”, “0”, or “P” are transmitted. The type of these signals is determined by the length of the amplitude modulation time of each signal. FIG. 5A shows a signal waveform in which the signal type is “1”, and it is determined that the signal type is “1” when the amplitude continues for 0.5 seconds from the rising edge of the signal. FIG. 5B shows a signal waveform in which the signal type is “0”, and it is determined that the signal type is “0” when the amplitude continues for 0.8 seconds from the rising edge of the signal. FIG. 5C shows a signal waveform in which the signal type is “P”, and it is determined that the signal type is “P” when the amplitude continues for 0.2 seconds from the rising edge of the signal. .

The signal representing “1” is in the “ON” state, and the numerical value associated with the item is an addition target when calculating the hour and minute. In FIG. 4, an item in which “N” is written on the time code format of the standard time radio signal indicates a state in which a signal representing “1” has been sent.
When a signal other than “1” is sent, the “OFF” state is entered, indicating that the numerical value associated with the item is not subject to addition when calculating the hour and minute.
For example, if the standard time radio signal is transmitted as “1, 0, 1, 0, 0, 1, 1, 1” in 8 seconds corresponding to minutes, the current time is “40 + 10 + 4 + 2 + 1 = 57” minutes. It is shown that. Items with “P” on the time code format of the standard time radio signal are fixed items, and are used to synchronize the standard time radio signal with the time code format. “P” at the beginning of the time code corresponds to the rising edge of the minute (0 seconds per minute), indicates that the second is “00” seconds, and indicates that the minute is switched to the next minute.

Next, a description will be given of a portion for correcting a time correction amount based on a propagation delay time when a standard time radio signal is received to generate a clock reference clock (1 Hz rectangular wave).
FIG. 6 is a schematic explanatory diagram when a standard time radio signal received by the receiver 2 is sampled at a sampling period of 100 KHz in order to generate a reference clock for a watch. As shown in this figure, the standard time radio signal is read at a sampling rate of 100 KHz to obtain “0/1”. When the read value changes from “0” to “1”, the clock reference clock signal is changed from “0” to “1”.

  However, the received standard time radio signal actually includes a propagation delay time corresponding to the distance from the transmission base station of the standard time radio signal to the current position of reception. The standard time radio signal including the delay is sampled. Therefore, by correcting the time corresponding to the propagation delay time as the time correction amount (Δt), it is possible to generate a clock signal serving as a clock reference. By this correction, it becomes possible to cancel the time corresponding to the propagation delay time, and an accurate reference clock signal for a clock can be generated.

  At this time, strictly speaking, an error (time delay) due to the sampling period is included. Theoretically, the time delay due to the sampling period is at most the same as the sampling period. In many cases, a commercially available radio wave clock or the like uses a sampling frequency of 32 Hz. The time delay of the reference clock signal due to the sampling period at this time is 1/32 = 31.25 msec at maximum. However, in this embodiment, since the sampling frequency is 100 KHz, the time delay of the reference clock signal due to the sampling period is 1/100 K = 10 μsec at the maximum. Therefore, the time delay of the reference clock signal due to the sampling period can be reduced as much as possible by changing the sampling frequency to 100 KHz instead of 32 Hz.

FIG. 7 is a flowchart for calculating the time correction amount Δt corresponding to the propagation delay time of the standard time radio signal when the position information is input. The flow will be described with reference to FIG.
Position information is input by inputting latitude / longitude, map code, address, postal code, telephone number, and the like to the keyboard 41 by the position information input unit 4. Further, by connecting a GPS receiver, a mobile phone, and a PHS to the input terminal 43, the CPU 50 of the position information processing unit 5 exchanges signals, and position information of latitude and longitude is input from the GPS receiver. The latitude and longitude of the nearest communication base station or map code position information is input from the telephone and the PHS (step S100). Then, the input position information is converted into numerical data of latitude and longitude as position data by the CPU 50 and the storage unit 51 of the position information processing unit 5 (step S101). On the other hand, the position data of the transmission base station of the standard time radio wave is read from the ROM 62 of the time correction processing unit 6 (step S102). Next, the distance between the two points is calculated based on the input position data and the position data of the read standard time radio wave transmission base station. At this time, an accurate distance is calculated by performing correction by the above-described geodetic system or spherical trigonometry (step S103). Next, the time correction amount Δt corresponding to the propagation delay time according to the distance is calculated by calculating the distance between the calculated two points and the propagation speed of the standard time radio wave (step S104).
Note that the formula for calculating the time correction amount Δt is calculated by formula (5).
Time correction amount Δt (seconds) = distance between two points (km) × 3.3 × 10 ⁻⁶ (seconds / km) (5)
Here, 3.3 × 10 ⁻⁶ (sec / km) is the propagation speed of the standard time radio wave.
Next, the calculated time correction amount is stored and saved in the RAM 63 of the time correction processing unit 6 as time correction data Δt (step S105).
The RAM 63 has a backup function, and the time correction data Δt is saved even when the power is turned off.

In addition, a different part from the above about the flow in the case of using the map code position data instead of the latitude and longitude position data will be described.
The input position information is converted into map code position data (step S101). Then, the map code which is the position data of the transmission base station of the standard time radio wave is read from the ROM 62 of the time correction processing unit 6 (step S102). Then, based on the input position data and the two map codes that are the position data of the transmitting base station, the distance between the two points is calculated using a map code calculation formula (step S103). In this way, the distance is obtained using the map code. The subsequent flow is the same as described above, and the description is omitted. It is determined whether the input position information is latitude / longitude or a map code. If the position information is latitude / longitude or a map code, the process of step S101 is omitted.

FIG. 8 is a flowchart for explaining a process from sampling a standard time radio signal, generating an accurate clock reference clock signal, and counting up the calendar data in the RAM 63 of the time correction processing unit 6 every second. The flow will be described with reference to FIG.
First, the standard time radio signal is sampled at a predetermined sampling period (step S110), and it is determined whether or not the standard time radio signal has changed from “0” to “1” by the sampling (step S111). When the standard time radio signal changes from “0” to “1”, the time correction data Δt stored in the RAM 63 of the time correction processing unit 6 is read (step S112).
Next, the time delay data Δt is used to correct the propagation delay of the standard time radio signal, and the duty ratio is 1: 1, in detail, the accurate 1 Hz where the high state (H) is 0.5 seconds and the low state (L) is 0.5 seconds. A process for generating a reference clock signal for a simple clock is executed.
First, in order to correct the propagation delay of the standard time radio signal with the read time correction data Δt, the time correction data Δt is subtracted from 0.5 seconds, and it is determined whether or not the subtracted time has elapsed (step S113). When the time resulting from the subtraction has elapsed, the clock reference clock signal is set to “L” (step S114). Then, in order to generate an accurate “L” of 0.5 seconds, it is determined whether or not 0.5 seconds have passed (step S115). When 0.5 second has elapsed, the calendar data in the RAM 63 of the time correction processing unit 6 is counted up by 1 second (step S116). At the same time, the clock reference clock signal is set to “H” (step S117). Next, it is determined whether or not a preset time, for example, 2 minutes has elapsed as a period until the time information acquisition unit 3 can acquire the time code data from the standard time radio signal (step S118). If two minutes have not elapsed, the process returns to step S110 for sampling the standard time radio signal and the process is repeated. If 2 minutes have passed, the flow ends.

With the above flow, an accurate clock reference clock signal is generated.
When the time code data is acquired by the time information acquisition unit 3, the calendar data in the RAM 63 is rewritten at a time in synchronization with the clock reference clock signal generated by the above flow under the control of the CPU 60. It will be. As a result, the time correction information output device 1 can output highly accurate correction time data in which the propagation delay of the standard time radio signal is corrected.

  Note that the above processing is performed every day at a predetermined time. At this time, the reference clock and calendar data are corrected using the time correction data read from the RAM 63. Further, while the process is not performed, the calendar data to be measured is rewritten based on the generated clock reference clock signal.

  In this embodiment, a display unit is also provided, and information such as the input position information, position data of the transmission base station of standard time radio waves, the distance between two points, and radio wave delay time can be confirmed by the display unit. Then, the user inputs and corrects the position information while confirming the information displayed on the display unit.

(Second Embodiment)
FIG. 9 is a schematic configuration diagram in which the time adjustment information output device is implemented as an automatic time adjustment clock.
The automatic time adjustment clock 10 of FIG. 9 is configured by connecting a timepiece unit 8 to the time adjustment information output device 1. The clock unit 8 is configured to display two types of clocks, a digital clock unit 8a for digital display and an analog clock unit 8b for hand-type analog display.

The digital timepiece unit 8a includes a liquid crystal control circuit 80 that controls driving of the liquid crystal panel and a liquid crystal display unit 81 that includes a liquid crystal panel.
The liquid crystal control circuit 80 transmits time data corresponding to the correction time to the liquid crystal display unit 81 based on the correction time data output from the time correction processing unit 6 of the time correction information output device 1.
In the liquid crystal display unit 81, the time is displayed on the liquid crystal panel based on the time data from the liquid crystal control circuit 80. Thus, digital display of the automatic time correction clock 10 is possible.

On the other hand, the analog timepiece unit 8b includes an analog control circuit 85 that controls driving, a stepping motor 86 that serves as a driving source for displaying hands based on the signal, a train wheel 87 that transmits the movement of the stepping motor 86, and a train wheel. The needle display unit 88 is configured to move the needle 87.
The analog control circuit 8b also includes a drive circuit for driving the stepping motor 86 and its control circuit. Then, based on the correction time data output from the time correction processing unit 6 of the time correction information output device 1, time data corresponding to the correction time is output to the stepping motor 86 as a drive pulse. The stepping motor 86 performs a moving operation every second by a driving pulse from the analog control circuit 85, and is transmitted to each wheel train constituting the train wheel 87 by the driving operation. As a result, the second hand, the minute hand and the hour hand constituting the hand display unit 88 are driven to display the time. Thus, an analog display of the automatic time correction clock 10 becomes possible.

  By providing the clock unit 8, a standard time radio wave is received at a predetermined time and the time is corrected. At this time, the propagation delay time is corrected based on the stored time correction data, and the corrected and corrected accuracy is obtained. An automatic time adjustment clock 10 that displays a correct time is now possible.

  This eliminates the need for the user to input the position information into the position information input unit 4 except when changing the position information, thereby reducing the complexity of the input.

Regarding the clock unit 8, in the second embodiment, since the digital clock unit 8a and the analog clock unit 8b are provided, the digital display and the analog display can be performed at the same time. However, the present invention is not limited to this, and either one of them is displayed. It may be an automatic time adjustment clock 10 provided with a clock unit 8a or 8b.
It is also possible to display the date by connecting a transmission system for displaying date, etc. to the train wheel 87.

(Third embodiment)
FIG. 10 is a schematic configuration diagram in which the time correction information output device 1 is mounted on a PDA (Personal Digital Assistance) 100 that is an electronic device.
The PDA 100 includes an input unit 101 for operation, a control unit 102 that controls the entire PDA 100, an output unit 103 that outputs a result in response to an input, and a display control circuit 104 that digitally displays the result in response to an input. The display unit 105 is provided. Further, the time correction information output device 1 is mounted, the display control circuit 104 controls the digital display of the correction time data, and the display unit 105 displays the time.
Here, the input unit 101 specifically includes an operation unit such as a tablet. The output unit 103 is specifically a speaker for outputting sound or an external memory card mounted on the PDA 100 for storing data. The display unit 105 is specifically composed of a liquid crystal panel for displaying characters and images.

  With this configuration, position information can be input by the input unit 101. Further, by using the PHS mounted on the PDA 100, it is also possible to send the position information to the time correction information output device 1 under the control of the control unit 102. As a result, the PDA 100 capable of correcting the time with high accuracy and displaying the highly accurate time has become possible.

Further, the time correction information output device 1 can be mounted not only on the PDA as in the third embodiment but also on other electronic devices. For example, it can be mounted on an electronic device such as a digital camera or a video camera that moves around the place. It can also be installed in audio-related electronic devices such as televisions and DVDs (Digital Versatile Disc) players that do not move places, and home-related electronic devices such as PCs, projectors, and copiers.
In particular, when mounted on an electronic device that does not move, the position information need only be input once at the beginning, and thereafter, the time is automatically adjusted with high accuracy at a predetermined time, which is very effective.

The embodiment is not limited to the first to third embodiments described above, and can be modified as follows.
(Modification 1) In each of the embodiments described above, the position information input to the position information input unit 4 is obtained by position information by latitude / longitude, map code, address and postal code, or by a GPS receiver, a mobile phone and a PHS. It was location information. However, in addition, the name of a facility or the name of a station may be used. As a result, the variation in the input of position information increases, so that the user can input various position information, the current position can be easily input, and convenience is improved.

  (Modification 2) In each of the above embodiments, when the position information input to the position information input unit 4 is a map code, the position information processing unit 5 may convert the map code into position data of latitude and longitude. As a result, when calculating the time correction amount corresponding to the distance between the two points between the transmission base station of the standard time radio wave and the input position, even if the map correction code is input, the distance can be calculated using spherical trigonometry. Corrections can be added. As a result, highly accurate time correction is possible.

  (Modification 3) In each of the above-described embodiments, a display unit for displaying position information input to the position information input unit 4 may be provided. Thereby, the user can confirm information such as the position information input by the user, the position data of the transmission base station of the standard time radio wave, the distance between the two points, the radio wave delay time, and the like on the display unit. The user can input and correct the position information while confirming the information displayed on the display unit, and the operability is improved.

The technical idea grasped from the embodiment and the modifications will be described below.
(1) In any one of Claims 1-12, the display part which displays the input said positional information is provided.
According to this configuration, the user can confirm various information such as the position information input by the user, the position data of the transmission base station of the standard time radio wave, the distance between the two points, and the radio wave delay time on the display unit. And when inputting or correcting position information, it is possible to operate while confirming the information displayed on the display unit, so that operability is improved.

(2) In any one of claims 1 to 12, the position information input unit is an operation unit (41) for operating the time correction information output device.
According to this configuration, a keyboard or the like for inputting position information can be used in common with an operation unit such as a keyboard or the like for operating a device provided in the time correction information output device. Therefore, the device can be downsized.

(3) In any one of claims 1 to 12, when the time correction processing unit generates an accurate reference clock of 1 second, a time obtained by subtracting the time correction amount from 0.5 seconds is used. And a step of correcting the reference clock by raising or lowering the reference clock when the time data signal rises.
According to this configuration, when generating an accurate reference clock of 1 second, a step of subtracting the time correction amount from 0.5 seconds is added to the program to be processed, and the reference clock is determined by whether or not the time has elapsed. For example, by switching from the high state (H) to the low state (L), the propagation delay time of the standard time radio wave can be corrected.

It is a schematic block diagram of the time correction information output device which concerns on 1st Embodiment of this invention. It is a schematic block diagram which connected the time server carrying a time correction information output device to the network. The input configuration of the position information input unit is shown, (a) is a configuration explanatory diagram that configures a keyboard, (b) is a mounting diagram on a time server, (c) is a configuration explanatory diagram that connects devices, and (d) is a time diagram. It is a connection diagram to a server. It is a time code format figure of a standard time electric wave. FIG. 4 is a signal waveform diagram of a standard time radio signal, where (a) is a waveform diagram with a signal “1”, (b) is a waveform diagram with a signal “0”, and (c) is a waveform diagram with a signal “P”. . It is explanatory drawing of the propagation delay time of the reference clock signal for timepieces by a standard time radio wave signal. It is a flowchart for calculating a time correction amount. It is a flowchart for producing | generating the reference | standard clock signal for timepieces. It is the schematic block diagram which comprised the time correction information output device which concerns on 2nd Embodiment of this invention as an automatic time adjustment timepiece. It is a schematic block diagram which mounted the time correction information output device which concerns on 3rd Embodiment of this invention in the electronic device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Time correction information output device, 2 ... Reception part, 3 ... Time information acquisition part, 4 ... Position information input part, 5 ... Position information processing part, 6 ... Time correction process part, 7 ... Time server, 8 ... Clock part , 8a ... Digital clock part, 8b ... Analog clock part, 10 ... Automatic time adjustment clock, 20 ... Antenna, 21 ... Amplification circuit, 22 ... Band pass filter, 23 ... Demodulation circuit, 30 ... Time information acquisition circuit, 40 ... Position Information input circuit 41 ... Keyboard as operation unit 42 ... GPS receiver, mobile phone, PHS and other electronic devices 43 ... Input terminal 50 ... CPU 51 ... Storage unit 60 ... CPU 61 ... Reference signal transmission Source 62 ... ROM 63 ... RAM 100 ... PDA Δt Time correction amount

Claims (15)

A receiver for receiving standard time radio waves having time information;
A time information acquisition unit that outputs time data corresponding to the time information of the standard time radio wave received by the reception unit;
A position information input unit for inputting position information;
Based on the input position information as first position data, based on the first position data and second position data that is the position information of the transmitting base station that transmits the standard time radio wave stored in advance. A position information processing unit for calculating a time correction amount corresponding to the distance between the two points;
Time to correct the clock reference clock and calendar data using the time correction amount calculated by the position information processing unit and the time data output from the time information acquisition unit, and output the corrected time data A time correction information output device comprising: a correction processing unit.   2. The time correction information output device according to claim 1, wherein the position information input to the position information input unit is a latitude and longitude.   2. The time correction information output device according to claim 1, wherein the position information input to the position information input unit is a map code.   2. The time correction information output device according to claim 1, wherein the position information input to the position information input unit is an address.   2. The time correction information output device according to claim 1, wherein the position information input to the position information input unit is a zip code.   2. The time correction information output device according to claim 1, wherein the position information input to the position information input unit is a telephone number.   2. The time correction information output device according to claim 1, wherein the position information input unit has an input terminal to which a GPS receiver, a mobile phone or a PHS can be connected.   8. The time correction information output device according to claim 7, wherein the position information input to the position information input unit is position information of latitude and longitude in the GPS receiver connected to the input terminal, and the mobile phone or the In the PHS, the time correction information output device is the latitude / longitude of the nearest communication base station to communicate or the position information of the map code.   8. The time correction information output device according to claim 1, wherein the position information is position information other than latitude and longitude and a map code, and the position information processing unit A storage unit for storing a conversion table for converting information into first position data made up of latitude and longitude or a map code; and the first position data and the second position data made up of latitude and longitude or a map code. A time correction information output device using the time correction amount to calculate the time correction amount.   8. The time correction information output device according to claim 1, wherein the position information is position information other than latitude and longitude, and the position information processing unit converts the position information to latitude. A storage unit for storing a conversion table for conversion into first position data composed of longitude; and calculating the time correction amount using the first position data composed of latitude and longitude and the second position data. A time correction information output device.   11. The time correction information output device according to claim 2, wherein the position information processing unit is configured to output both the two positions based on the first position data and the latitude and longitude that are the second position data. A time correction information output device that adds a distance correction when calculating a time correction amount corresponding to a distance between points.   12. The time correction information output device according to claim 1, further comprising a storage unit that stores the time correction amount, wherein the position information processing unit reads the time correction read from the storage unit. A time correction information output device that corrects the clock reference clock and calendar data using the amount and the time data output from the time information acquisition unit.   The time correction information output device according to any one of claims 1 to 12, and a clock unit that displays a time according to the correction time based on the correction time data output from the time correction information output device. An automatic time correction clock characterized by comprising:   A time server comprising the time correction information output device according to any one of claims 1 to 12. An electronic apparatus comprising the time correction information output device according to any one of claims 1 to 12.

Images