JP2005189188A - Clocking device and its correcting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clocking device enabling time adjustment by surely receiving a standard wave, and to provide its correcting method. <P>SOLUTION: The clocking device includes a clocking means for clocking the time, and a correcting means for correcting the time information clocked with the clocking means so as to be the time information by receiving a prescribed electric wave, and extracting the time information included in the electric wave received. The correction means comprises extracting the time information contained in the received electric wave at a first time; acquiring a first difference which si the difference between the extracted time information and the time information clocked with the clocking means at the time; extracting time information included in the electric wave received at a second time, which is different from the first time; and acquiring a second difference being a difference between the extracted time information and time information clocked with the clocking means at the time. When the first difference and the second difference match, the time information, clocked with the clocking means, is corrected to the time information acquired from the electric wave received. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a timing device and a correction method thereof, and more particularly, to a timing device that receives a radio wave including time information and corrects a timing time and a correction method thereof.

  The radio timepiece receives a standard radio wave that is a standard of time and frequency, detects the standard time, and adjusts the display time of the timepiece. This radio timepiece is currently used for a wall clock or a wristwatch.

  FIG. 5 shows a block diagram of the radio timepiece.

  The radio timepiece 100 mainly includes a receiving unit 111, a time measuring unit 112, and a display unit 113 (see Patent Document 1).

  The reception unit 111 includes an antenna 121 and a reception circuit 122, and detects a standard radio wave received by the antenna 121 by the reception circuit 122. The detection signal detected by the receiving unit 111 is supplied to the time measuring unit 112.

  The timer unit 112 includes a vibrator 131 and a timer circuit 132. The vibrator 131 oscillates at a predetermined frequency and supplies the oscillation output to the timer circuit 132. The clock circuit 132 divides the oscillation output from the vibrator 131 to generate a time step timing, and performs the time step. The time information being advanced by the time measuring circuit 132 is supplied to the display unit 113.

  The display unit 113 includes a driver 141 and a display 142. The driver 141 generates a drive signal for driving the display 142 based on the time information supplied from the time measuring circuit 132. The display 142 includes, for example, a VFD (vacuum fluoresce display), an LCD (liquid crystal display), and the like, and is driven according to a drive signal supplied from the driver 141 to display time.

JP 2000-195265 A

  However, the standard radio wave to be received by the radio timepiece is easily affected by noise, etc., so there are many misdetections of time information, and even when it is received, it is corrected at a different time. .

  The present invention has been made in view of the above points, and it is an object of the present invention to provide a time measuring device that can reliably receive a standard radio wave and adjust the time, and a method for correcting the time.

  The present invention is a time measuring means for measuring time and a correction for receiving a predetermined radio wave, extracting time information included in the received radio wave, and correcting the time information timed by the time measuring means so as to be time information. And a correction unit that extracts time information included in the received radio wave at a first time, and the difference between the extracted time information and the time information timed by the time measuring unit at that time Is obtained, the time information included in the received radio wave is extracted at a second time different from the first time, and the extracted time information and the time information timed by the time measuring means at that time are extracted. Is obtained, and when the difference between the first difference and the second difference coincides, the time information timed by the time measuring means is changed to the time information obtained from the received radio wave. It is characterized by correction.

  The correcting means corrects the time measurement time information to time information acquired from the received radio wave when the first difference or the second difference is within a predetermined range.

  Furthermore, a time measuring means for measuring time, and a correcting means for receiving a predetermined radio wave, extracting time information included in the received radio wave, and correcting the time information timed by the time measuring means so as to be time information And the correction means has switching means for switching the operation mode, and the correction means is selected by operation of the switching means, and extracts time information included in the received radio wave at the first time, A first difference which is a difference between the extracted time information and the time information timed by the time measuring means is acquired, and the time information included in the received radio wave is obtained at a second time different from the first time. When the second difference that is the difference between the extracted time information and the time information time-measured at that time is acquired and the difference between the first difference and the second difference matches , Receive time information timed by timekeeping means A first operation mode to be corrected to time information acquired from the wave, and time information included in the received radio wave selected at the first time by the operation of the switching means, and the extracted time information and time count Obtaining a first difference which is a difference from the time information timed by the means, extracting time information included in the received radio wave at a second time different from the first time, and extracting the time information At this time, when the second difference that is the difference from the time information timed by the time measuring means is acquired and the difference between the first difference and the second difference coincides, the first difference or the second difference When the difference is within a predetermined range, it has a second operation mode for correcting the time measurement time information to the time information acquired from the received radio wave. At this time, the correcting means operates in the first operation mode in the initial state.

  According to the present invention, the time information included in the received radio wave is extracted at the first time, and the first difference that is the difference between the extracted time information and the time information timed by the time measuring unit is obtained. Then, the time information included in the received radio wave is extracted at a second time different from the first time, and the second time which is the difference between the extracted time information and the time information timed by the time measuring means at that time When the difference is acquired and the difference between the first difference and the second difference coincides, the time information measured by the time measuring means is corrected to the time information acquired from the received radio wave, thereby obtaining the received radio wave. Whether or not the time information included therein can be normally received can be confirmed by using the time information of the time measuring means and adopted, so that the time can be corrected accurately.

  At this time, since the normality of the time information acquired from the received radio wave can be confirmed twice at the first time and the second time, the normality of the time information can be confirmed with a small number of receptions. Therefore, the normality of the time information can be confirmed quickly and with a high probability.

  Furthermore, according to the present invention, the time information included in the received radio wave is extracted at the first time by the operation of the switching means by the user, and the extracted time information and the time information timed by the time measuring means at that time Is obtained, and time information included in the received radio wave is extracted at a second time different from the first time, and the extracted time information and timekeeping means at that time are timed. The time when the second difference, which is the difference from the time information, is acquired, and the time information measured by the time measuring means is acquired from the received radio wave when the difference between the first difference and the second difference coincides. The first operation mode to be corrected to information and the time information included in the received radio wave are extracted at the first time selected by the operation of the switching means, and the extracted time information and the time measuring means at that time are timed. 1st difference which is a difference with time information The time information contained in the received radio wave is extracted at a second time different from the first time, and the second time is the difference between the extracted time information and the time information timed by the time measuring means at that time When the difference between the first difference and the second difference coincides, and the first difference or the second difference is within a predetermined range, the time measurement time information is acquired from the received radio wave By switching between the second operation mode to be corrected to the set time information, the time measurement time can be corrected by the time information acquired from the received radio wave regardless of the time measurement time by the first operation mode. The timekeeping time can be accurately corrected by the time information acquired from the received radio wave in the second operation mode, or the user can freely select according to the usage state of the timekeeping device.

〔System configuration〕
FIG. 1 shows a block diagram of an embodiment of the present invention.

  The timing device 1 of the present embodiment is, for example, an on-vehicle timing device mounted on an automobile, and includes a receiving unit 11, a timing unit 12, and a display unit 13. The receiving unit 11 includes an antenna 21, an amplifier circuit 22, a filter 23, and a detection circuit 24. The antenna 21 receives radio waves and converts them into electrical signals. The electrical signal converted by the antenna 21 is supplied to the amplifier circuit 22.

  The amplifier circuit 22 amplifies the electric signal supplied from the antenna 21 and supplies the amplified signal to the filter 23. The filter 23 passes the signal in the frequency band including the standard radio wave from the signal amplified by the amplifier circuit 22. The signal that has passed through the filter 23 is supplied to the detection circuit 24. The detection circuit 24 detects a signal corresponding to the standard radio wave from the signal that has passed through the filter 23. The detection signal detected by the detection circuit 24 is supplied to the timer unit 12.

  The timer unit 12 includes a timer circuit 31, a memory 32, an oscillation circuit 33, and a mode switch 34. The clock circuit 31 is supplied with a detection signal from the receiving unit 11 and is connected to the memory 32, the oscillation circuit 33, and the mode changeover switch 34, and to terminals Tacc and Tb.

  The timer circuit 31 decodes the detection signal from the receiving circuit 11 and acquires standard time information. Further, the clock circuit 31 is supplied with an oscillation output of a predetermined frequency from the oscillation circuit 33, counts the oscillation output from the oscillation circuit 33, and advances the clock time information. Further, the timer circuit 31 can be operated in three operation modes of the first automatic correction mode M1, the second automatic correction mode M2, and the non-automatic correction mode M3, and according to the operation of the mode changeover switch 34. The operation mode can be switched.

  The first automatic correction mode M1 is an operation mode in which the timekeeping time information is automatically corrected to the standard time information unconditionally when normal reception is performed. In the second automatic correction mode M2, the difference (ΔA−ΔB) and the time difference between the time difference ΔA between the standard time information ts1 and the time measurement time information tic and the time difference ΔB between the standard time information ts2 and the time measurement time information tc2 at different times. This is an operation mode for automatically correcting the timekeeping time information to the standard time information based on ΔA or ΔB. The non-automatic correction mode M3 is an operation mode in which automatic correction based on standard time information is not performed.

  In addition, the clock circuit 31 is supplied with a battery power source Vb that is turned on / off by connection of a battery and an accessory power source Vacc that is turned on / off by an accessory switch, and operates in the second automatic correction mode M2. In some cases, when the accessory power supply Vacc is turned off, the detection signal from the receiving unit 11 is decoded to correct the timekeeping time information to the standard time information. Note that the time count information stepped by the time count circuit 31 is supplied to the display device 13.

  The display device 13 includes a driver circuit 41 and a display 42. The driver circuit 41 is supplied with time measurement time information from the time measurement circuit 31. The driver circuit 41 generates a drive signal for driving the display 42 based on the time count information supplied from the time count circuit 31. The display 42 is composed of a VFD (vacuum fluoresce display), an LCD (liquid crystal display), and the like, is driven according to a drive signal supplied from the driver circuit 41, and displays the time measured according to the time measured information.

[Operation of the clock circuit 31]
Next, the operation of the timer circuit 31 will be described. First, the mode switching process will be described.

[Mode switching process of the timer circuit 31]
FIG. 2 shows a process flowchart of the mode switching process of the timer circuit 31.

  When the battery power source Vb is turned on in step S1-1, the timer circuit 31 operates in the first automatic correction mode M1 in step S1-2. In the first automatic correction mode M1, when standard time information is extracted from the standard radio wave, the time measurement time information is unconditionally corrected to the extracted standard time information. In the first automatic correction mode M2, it is possible to perform automatic correction regardless of the time of the standard time information extracted from the received standard radio wave or the time measurement time information.

  When the mode selector switch 34 is operated in step S1-3 when the mode changeover switch 34 is operated in step S1-3, the timer 31 operates in the second automatic correction mode M2 in step S1-4. Transition to. The second automatic correction mode M2 detects the difference between the standard time information extracted from the received standard radio wave and the time measurement information, and corrects the time measurement information to the standard time information extracted when the difference is within a predetermined time. It is a mode to do. In the second automatic correction mode M2, erroneous correction can be prevented.

  Further, when the mode changeover switch 34 is operated in step S1-5 while operating in the second automatic correction mode M1, the time counting circuit 31 changes the operation mode to the non-automatic correction mode M3 in step S1-6. Transition to. The non-automatic correction mode M3 is a mode in which automatic correction of timekeeping time information is not performed using a standard radio wave. By setting the non-automatic correction mode M3 when it is difficult to receive a standard radio wave, it is possible to prevent erroneous correction of timekeeping time information.

  In addition, when the mode changeover switch 34 is operated in step S1-7 while operating in the non-automatic correction mode M3, the timer circuit 31 returns to step S1-2 and the operation mode is the second automatic correction. Transition to mode M2.

  As described above, the time counting circuit 31 operates in the first automatic correction mode M1 when the battery is connected, and after the battery is connected, the operation is performed by the operation of the mode changeover switch 34 by the user. The second automatic correction mode M2 or the non-automatic correction mode M3 is selected. Thereby, the user can freely select the operation of the timing circuit 31 according to the usage state of the timing device 1.

  Next, the first automatic correction mode M1, the second automatic correction mode M2, and the non-automatic correction mode M3 will be described.

[First automatic correction mode M1]
Next, the first automatic correction mode M1 will be described.

  FIG. 3 shows a process flowchart of the first automatic correction mode M1.

  When the accessory power source Vacc is turned off in step S2-1, the time measuring circuit 31 decodes the detection signal from the receiving unit 11 in step S2-2 and acquires standard time information. Next, the time measuring circuit 31 determines whether or not n for identifying the number of times the standard time information has been acquired in step S2-3 is “0”. When n is “0” in step S2-3, that is, when the number of times standard time information has been acquired is the first time, the time measuring circuit 31 determines that the standard time information ts0 and time count time information TC0 received in step S2-4 are The time difference ΔA (= ts0−tc0) is calculated and stored in the memory 32.

  Next, the timer circuit 31 sets n to “1” in step S2-5, returns to step S2-2, and acquires standard time information again.

  When n is “1” in step S2-3, that is, when the number of times standard time information is acquired is the second time, the time measuring circuit 31 receives the standard time information ts2 and time count time information received in step S2-6. A time difference ΔB (= ts 1 −tc 1) from tc 2 is calculated and stored in the memory 32.

  Next, the time measuring circuit 31 determines whether or not the time difference ΔA and the time difference ΔB stored in the memory 32 in step S2-7 match (ΔA = ΔB). When the time difference ΔA and the time difference ΔB do not match (ΔA ≠ ΔB) in step S2-7, the time measuring circuit 31 determines that the standard time information acquired in the second time in step S2-2 has an error, and step S2 After the time difference ΔA stored in the memory 32 is cleared at −8, the time difference ΔA is set as the time difference ΔB, and the time difference ΔB is cleared.

  Next, the time measuring circuit 31 returns to step S2-2 to acquire the standard time information again. At this time, since n = 1, the acquired standard time information is treated as the standard time information acquired for the second time in step S2-3, and the time difference ΔB is obtained in step S2-6.

  In addition, when the time difference ΔA and the time difference ΔB coincide with each other (ΔA = ΔB) in step S2-7, the time measuring circuit 31 unconditionally corrects the time measuring time information tc2 to the standard time information ts2 in step S2-9. . As described above, the time measurement time information is corrected to the standard time information.

  Next, the timer circuit 31 clears n and the time differences ΔA and ΔB in step S2-10, returns to step S3-1, and continues the processing.

  Thus, in the first automatic correction mode M1, whether or not the time difference ΔA between the standard time information ts0 and the time measurement time information tc0 matches the time difference ΔB between the standard time information ts1 and the time measurement time information tc1 in step S2-7. By determining whether or not the standard time information ts has been normally acquired, it is possible to prevent the time measurement time information tc1 from being corrected to the standard time information ts1 decoded in error.

  In addition, since the correction can be performed without confirming the normality of the standard time information ts based on the time difference ΔB between the standard time information ts1 and the time measurement time information tc1, the clock time information tc is standard when the time measuring device 1 is in the initial state. Even when the time information ts is significantly different, the time measurement time information tc can be corrected to the standard time information ts. This is advantageous in an initial state such as when the battery power source VB is turned on.

[Second automatic correction mode M2]
Next, the second automatic correction mode M2 will be described.

  FIG. 4 shows a process flowchart of the second automatic correction mode M2. In the figure, the same steps as those in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted.

  In the second automatic correction mode M2, when the time difference ΔA coincides with the time difference ΔB (ΔA = ΔB) in step S2-7, the time difference ΔB or time difference ΔA is then set to a predetermined time in step S3-1. It is determined whether it is within T0. The predetermined time T0 is set to about 9 minutes, for example.

  If the time difference ΔB or the time difference ΔA is within the predetermined time T0 in step S3-1, the time measuring circuit 31 has a small time difference between the standard time information ts2 and the time measurement time information tc2, and the standard radio wave is normally received and decoded. In step S2-9, the clock time information tc2 is corrected to the standard time information ts2. As described above, the time measurement time information is corrected to the standard time information.

  If the time difference ΔB or time difference ΔA is larger than the predetermined time T0 in step S3-1, the time measuring circuit 31 has a large time difference between the standard time information ts1 and the time measurement time information tc1, and there is an abnormality in receiving or decoding the standard radio wave. If it is determined that there is, the time adjustment process in step S2-9 is not performed, and n and time differences ΔA and ΔB are cleared in step S2-10, and the process returns to step S2-1 to continue the process.

  As described above, in the second automatic correction mode M2, whether or not the time difference ΔA between the standard time information ts0 and the time measurement time information tc0 or the time difference ΔB between the standard time information ts1 and the time measurement time information tc1 is within the predetermined time T0 in step S3-1. Since it is determined whether or not the standard time information ts has been normally acquired, it is possible to prevent the time measurement time information tc from being corrected to the standard time information ts decoded in error.

  As described above, in the second automatic correction mode M2, the time difference ΔA between the standard time information ts0 and the time measurement time information TC0 and the time difference ΔB between the standard time information ts1 and the time measurement time information TC1 are doubled. By checking the normality, it is possible to reliably prevent erroneous correction.

  In this embodiment, the normality of the standard time information ts1 is confirmed by the time difference ΔA between the standard time information ts0 and the time measurement time information TC0 and the time difference ΔB between the standard time information ts1 and the time measurement time information TC1. The time difference Δts between the information ts0 and the standard time information ts1 and the time difference Δtc between the time measurement time information tc0 and the time measurement time information tc1 may be confirmed to check the normality of the standard time information ts1 to correct the time measurement time information tc1. .

[Others]
Note that the timer circuit 31 may be configured by a microcomputer or the like, and may execute the above operation by a program, or the logic may be configured to execute the above operation.

It is a block block diagram of one Example of this invention. It is a process flowchart of a mode switching process. It is a process flowchart of 1st automatic correction mode M1. It is a process flowchart of the 2nd automatic correction mode M2. It is a block diagram of a radio timepiece.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Time measuring device 11 Receiving part 21 Antenna, 22 Amplification circuit, 23 Filter, 24 Detection circuit 12 Time measuring part 31 Time measuring circuit, 32 Memory, 33 Oscillation circuit, 34 Mode change switch 13 Display part 41 Driver circuit, 42 Display

Claims (8)

Time measuring means for measuring time and correction for receiving predetermined radio waves, extracting time information included in the received radio waves, and correcting the time information timed by the time measuring means so as to be the time information A timing device having means,
The correction means extracts time information included in the received radio wave at a first time, and calculates a first difference that is a difference between the extracted time information and the time information timed by the time measuring means at that time. The time information included in the received radio wave is extracted at a second time different from the first time, and the difference between the extracted time information and the time information timed by the time measuring means at that time is obtained. The time when the second time difference is acquired, and when the difference between the first difference and the second difference coincides, the time information measured by the time measuring means is acquired from the received radio wave. Timekeeping device characterized by correcting information. The correction means corrects the time measurement time information to the time information acquired from the received radio wave when the first difference or the second difference is within a predetermined range. The timing device described. Time measuring means for measuring time and correction for receiving predetermined radio waves, extracting time information included in the received radio waves, and correcting the time information timed by the time measuring means so as to be the time information A timing device having means,
The correction means has switching means for switching the operation mode,
The correction means is selected by operating the switching means, extracts time information included in the received radio wave at a first time, and the extracted time information and the time information timed by the time measuring means at that time Is obtained, and time information included in the received radio wave is extracted at a second time different from the first time, and the extracted time information and the time measuring means at that time are timed. A second difference that is a difference from the time information being recorded, and when the difference between the first difference and the second difference matches, the time information being timed by the time measuring means A first operation mode for correcting the time information acquired from the received radio wave;
The time information selected by the operation of the switching means and extracted from the time information included in the received radio wave at the first time, and the difference between the extracted time information and the time information timed by the time measuring means at that time 1 is obtained, time information included in the received radio wave is extracted at a second time different from the first time, and the extracted time information and time information timed by the time measuring means at that time are extracted. When the difference between the first difference and the second difference is the same, the first difference or the second difference is within a predetermined range. And a second operation mode for correcting the time information to the time information acquired from the received radio wave. The time measuring device according to claim 3, wherein the correcting means operates in the first operation mode in an initial state. Time measuring means for measuring time and correction for receiving predetermined radio waves, extracting time information included in the received radio waves, and correcting the time information timed by the time measuring means so as to be the time information A time correction method for a time measuring device having means,
A first time extraction procedure for extracting time information included in the received radio wave at a first time;
A first difference acquisition procedure for acquiring a first difference that is a difference between the time information extracted in the first time extraction procedure and the time information timed by the time measuring means;
A second time extraction procedure for extracting time information included in the received radio wave at a second time different from the first time;
A second difference acquisition procedure for acquiring a second difference which is a difference between the time information extracted in the second time extraction procedure and the time information timed by the time measuring means;
The first difference acquired in the first difference acquisition procedure is compared with the second difference acquired in the second difference acquisition procedure, and the first difference and the second difference are compared. And a correction procedure for correcting the time information measured by the time measuring means to the time information acquired from the received radio wave when the difference coincides. The correction procedure corrects the time measurement time information to the time information acquired from the received radio wave when the first difference or the second difference is within a predetermined range. The time correction method of the time measuring device described. Time measuring means for measuring time and correction for receiving predetermined radio waves, extracting time information included in the received radio waves, and correcting the time information timed by the time measuring means so as to be the time information A time correction method of a time measuring device having means,
The correction means has switching means for switching the operation mode,
Extracting time information included in the received radio wave at a first time, obtaining a first difference that is a difference between the extracted time information and the time information timed by the time measuring means at the time, Time information included in the received radio wave is extracted at a second time different from the first time, and a second difference which is a difference between the extracted time information and the time information timed by the time measuring means at that time When the difference between the first difference and the second difference matches, the time information timed by the time measuring means is corrected to the time information obtained from the received radio wave. 1 operation mode,
Extracting time information included in the received radio wave at a first time, obtaining a first difference that is a difference between the extracted time information and the time information timed by the time measuring means at the time, Time information included in the received radio wave is extracted at a second time different from the first time, and a second difference which is a difference between the extracted time information and the time information timed by the time measuring means at that time And when the difference between the first difference and the second difference coincides, if the first difference or the second difference is within a predetermined range, A second operation mode for correcting the time information acquired from the received radio wave,
A time correction method for a time measuring device, which is selectively operable in the first operation mode or the second operation mode by an operation of the switching means. 8. The time correction method for a time measuring device according to claim 7, wherein the correction means operates in the first operation mode in an initial state.

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