JP4196863B2 - Time data receiving apparatus and program - Google Patents

Description

  The present invention relates to a time data receiving apparatus and program, and is suitable for application to, for example, an arm-mounted radio timepiece.

  Currently, in Japan (Japan), time data, that is, 40 kHz and 60 kHz standard radio waves including time codes are transmitted from two transmitting stations (Fukushima Prefecture and Saga Prefecture). In recent years, so-called radio timepieces have been put to practical use that receive such standard time-code radio waves and thereby correct time data of the time counting circuit. A radio timepiece corrects the current time by receiving a standard radio wave via a built-in antenna, amplifying and modulating the time code, and decoding the time code.

By the way, in this type of radio-controlled timepiece, the reception sensitivity generally varies greatly depending on the direction of the antenna. Therefore, in order to solve the directivity problem, two orthogonal antennas are provided, an antenna having a signal level higher than a predetermined level is selected, and time information is obtained from the standard radio wave received by the selected antenna to correct the time. (See, for example, Patent Document 1).
JP 2001-324583 A

However, in the radio timepiece having such a configuration, it is not guaranteed that the antenna points to the transmitting station accurately, so that the reception efficiency is still poor, and two antennas are required as a price for solving the problem. was there.
The present invention has been made in consideration of the above points, and an object thereof is to realize a time data receiving apparatus capable of indicating an optimum direction for reception.

In order to solve such a problem, in the time data receiving apparatus according to claim 1 (for example, the radio timepiece 1 in FIG. 1),
Time counting means for counting current time information (for example, the timing circuit unit 25 in FIG. 2);
Direction detecting means (for example, the direction detecting unit 23 in FIG. 2) for detecting the direction (for example, the 12 o'clock direction X in FIG. 1) to which the specific position of the device is directed;
Detection direction display control means (for example, CPU 20 in FIG. 2; step S58 in FIG. 5) for displaying the direction detected by the direction detection means,
An antenna for receiving radio waves including time data (for example, the bar antenna 11 in FIG. 1);
Intensity detecting means (for example, the receiving circuit unit 26 in FIG. 2) for detecting the intensity of radio waves received by the antenna;
Correction means (for example, the CPU 20 in FIG. 2; step S6 in FIG. 4) extracts time data from the radio wave received by the antenna and corrects the current time information counted by the time counting means based on the time data. To S14),
Storage means for storing the radio wave intensity and direction (for example, the intensity storage unit 223 in FIG. 2);
It is determined whether or not the intensity of the radio wave detected by the intensity detection unit at the time correction by the correction unit is the maximum among the radio field intensities detected at the previous time correction. Storage control means (for example, CPU 20 in FIG. 2; steps S20 to S22 in FIG. 4) that associates the intensity and the azimuth detected by the azimuth detection means when the maximum radio wave intensity is obtained and stores them in the storage means. )When,
The optimum azimuth display control means (for example, CPU 20 in FIG. 2; step S26 in FIG. 4; step in FIG. 5) displays the azimuth corresponding to the radio field intensity determined to be the maximum radio field intensity by the storage control means. S55)
It is characterized by having.

In the program according to claim 5 (for example, the time correction processing program 211 in FIG. 2),
An azimuth detecting means (for example, the azimuth detecting unit 23 in FIG. 2) for detecting the azimuth in which the specific position of the device is directed, and an antenna for receiving radio waves including time data (for example, the bar antenna 11 in FIG. 1) The computer of the apparatus (for example, the radio timepiece 1 of FIG. 1) provided with storage means (for example, the intensity storage unit 223 of FIG. 2) and a computer (for example, the CPU 20 of FIG. 2),
A time counting function for counting current time information;
A detected azimuth display control function (for example, step S58 in FIG. 5) for controlling the azimuth detected by the azimuth detecting means;
An intensity detection function (for example, step S8 in FIG. 4) for detecting the intensity of the radio wave received by the antenna;
A correction function (for example, steps S6 to S14 in FIG. 4) that extracts time data from the radio wave received by the antenna and corrects the current time information counted by the time counting function based on the extracted time data; ,
It is determined whether or not the intensity of the radio wave detected by the intensity detection function at the time correction by the correction function is the maximum of the radio wave intensity detected at the previous time correction. A storage control function (for example, steps S20 to S22 in FIG. 4) for storing the intensity and the azimuth detected by the azimuth detecting means when the maximum radio wave intensity is obtained in association with the storage means;
The optimum azimuth display control function for performing control to read out and display the azimuth corresponding to the radio field intensity determined to be the maximum radio field intensity by the storage control function (for example, step S26 in FIG. 4, step S55 in FIG. 5). When,
It was made to realize.

  Therefore, according to the time data receiving apparatus according to claim 1 and the program according to claim 5, the azimuth at the time when the highest intensity is shown among the previously measured electric field intensity and the intensity thereof are determined by the user. Can be shown.

The time data receiving device according to claim 2 is the time data receiving device according to claim 1,
It further comprises a place selection / designating means (for example, the place selection switch 152 in FIG. 2) for selecting and designating one place from a plurality of places.
The storage means is means (for example, the intensity storage unit 223 in FIG. 3) for storing the maximum radio field intensity and direction for each of the plurality of places.
The storage control means compares the newly detected radio wave intensity with the maximum radio wave intensity stored in the storage means in association with the one place, and the newly detected radio wave intensity is stronger. In this case, means for storing the newly detected radio wave intensity and direction in place of the radio field intensity and direction corresponding to the one place stored so far (for example, the CPU 20 in FIG. 2; 4 steps S18 to S22).
It is characterized by that.

  Therefore, according to the time data receiving device according to claim 2, the azimuth at the time of showing the greatest strength among the electric field strengths measured before and the strength corresponding to each of a plurality of places are used. Can be shown to the person. Thus, for example, when a user shows the highest strength among the previously measured electric field strengths for each of a plurality of places in a residence such as a living room or a bedroom, or for various places such as a home or a company. Can be known and its strength.

The time data receiving device according to claim 3 is the time data receiving device according to claim 1,
The storage means is means for storing the maximum radio wave intensity and direction corresponding to each of a plurality of time zones (for example, the storage unit in FIG. 6),
When the newly detected radio wave intensity is stronger than the newly detected radio wave intensity and the radio wave intensity stored corresponding to the current time zone, the control means It is a means for storing the newly detected radio field intensity and direction instead of the radio field intensity and direction stored so far.
It is characterized by that.

  Therefore, according to the time data receiving device according to claim 3, the azimuth at the time when the highest intensity is shown among the previously measured electric field strengths and the strength thereof are associated with each of a plurality of time zones. Can be shown to the user. In this case, it is possible to strictly cope with the change in radio direction due to the time zone at the same location. It is possible to realize a radio timepiece that can be shown in FIG.

Further, the time data receiving device according to claim 4 is the time data receiving device according to any one of claims 1 to 3,
Furthermore, it has an explicit means (for example, CPU 20 in FIG. 2; steps S59 and S60 in FIG. 5) that clearly indicates whether or not the specific position of the own device is oriented in the direction corresponding to the maximum intensity.
It is characterized by that.

  Therefore, according to the time data receiving apparatus of the fourth aspect, it is possible to easily know whether the time data receiving apparatus is in the optimum direction.

  ADVANTAGE OF THE INVENTION According to this invention, the time data receiver which can show a user the optimal azimuth | direction for reception is realizable.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments for carrying out the invention will be described in detail with reference to the drawings. In the present embodiment, the case where the present invention is applied to an arm-mounted radio timepiece will be described, but the form to which the present invention is applicable is not limited to this.

  FIGS. 1A and 1B are schematic front views of an arm-mounted radio timepiece 1 according to the present embodiment. The radio timepiece 1 includes a timepiece module 10 and a long and thin core with a coil extending in the longitudinal direction thereof. A wound bar antenna 11, a case 12 as a case body for housing the watch module 10 and the bar antenna 11 therein, and a transparent resin or glass provided in the case 12 so as to protect the watch module 10 And 12 o'clock direction and 6 o'clock direction of the case 12 for mounting the radio timepiece 1 on the arm (the radio timepiece 1 in the present embodiment is not an analog timepiece, but for the sake of simplicity, the direction of 12 o'clock and 6 o'clock) The band 14 is attached to each of the end portions of the switch portion 15), and the switch portion 15 is composed of one or more push-down switch groups.

  On the cover glass side of the timepiece module 10, a display panel surface 16 that displays the date, current time, and the like by lighting the liquid crystal is provided.

  The display panel 16 has a date display unit 181 for displaying the date, a location code display unit 182 for displaying a location code related to time correction processing described later, an optimal orientation display unit 183 for displaying the optimal orientation, and various other times. An information display unit 18 including a time display unit 184 for displaying information, and 60 liquid crystal display bodies (1900, 1901,..., 1959) are arranged in an annular shape on the periphery of the information display unit 18. A peripheral display portion 19 is provided. The radio timepiece 1 normally operates in a current time display mode (FIG. 1A) that displays the current time on the time display unit 184 and functions simply as a clock. (B)) etc., it is comprised so that it can set to the some operation state from which the information content displayed on the information display part 18 differs. In addition, when there is a transmitting station in a direction perpendicular to the longitudinal direction of the bar antenna 11, that is, when the timepiece of the radio clock is facing the transmitting station, the receiving sensitivity is the best, and the direction is the optimal direction. .

  FIG. 1B shows the radio-controlled timepiece 1 that has been in a state of providing an azimuth measurement function (hereinafter referred to as an azimuth measurement mode) through switch processing described later. In this azimuth measurement mode, the information display unit 18 displays on the time display unit 184 the azimuth angle (current azimuth) indicated by the 12 o'clock direction X of the radio timepiece 1 at that time, for example, in 60 minutes instead of the current time. Further, based on the azimuth angle, four azimuths (north, west, south and east) are displayed on the peripheral display unit 19 as azimuth graphics (19n, 19w, 19s and 19e). In the present embodiment, as an example of the azimuth graphic, as shown in the figure, three liquid crystal display bodies in the position representing north and one liquid crystal display body in the position representing the other three directions are turned on. By doing so, more accurate visual recognition is possible.

  The switch unit 15 (FIGS. 1A and 1B) includes a radio wave reception switch 151 for manually executing (activating) the time correction function and a location selection switch 152 for selecting and setting a location code. And an azimuth measurement switch 153 for shifting the state of the radio timepiece 1 to the azimuth measurement mode and measuring the azimuth.

  FIG. 2 is a block diagram showing an internal configuration of the radio timepiece 1 according to the present embodiment. A CPU (Central Processing Unit) 20 as a control unit (computer) has a ROM (Read Only Memory) 21 and a RAM (Random Access Memory). 22, an azimuth detecting unit 23, an input unit 24, a timing circuit unit 25, a receiving circuit unit 26, and a display unit 27 are connected to each other.

  The CPU 20 reads out various programs stored in the ROM 21 in accordance with predetermined timing or an operation signal input from the input unit 24 and develops them in the RAM 22, and gives instructions and data to each functional unit based on the programs. For example. In particular, the CPU 20 controls the reception circuit unit 26 to execute standard radio wave reception processing, for example, at a predetermined time, corrects the current time data counted by the timing circuit unit 25, and adds the corrected current time data to the corrected current time data. Various controls such as updating the display time based on this are performed.

  The ROM 21 is an area for storing various initial setting values and initial programs as well as programs and data for realizing each function of the radio timepiece 1, and in particular, a program for realizing the present embodiment. As shown, a time correction processing program 211 and a switch processing program 212 are stored.

  The RAM 22 is a data storage area for holding various programs executed by the CPU 20, data related to the execution of these programs, and the like, and is detected by the azimuth detecting unit 23 particularly for the purpose of realizing the present embodiment. Current azimuth storage unit 221 that holds the recorded azimuth, current intensity storage unit 222 that holds the electric field strength of the radio wave received by the receiving circuit unit 26, and specified location code storage that holds the location code currently set in the radio timepiece 1 Unit 224 and intensity storage unit 223.

  Here, as shown in FIG. 3, the intensity storage unit 223 stored in the RAM 22 includes a plurality of sets (hereinafter referred to as records) of optimal orientation 2232 and radio wave intensity 2233 (hereinafter referred to as record groups). Is a storage area managed in association with the location code. In the following description, a record corresponding to one place code is referred to as a record specified by the place code.

  The display unit 27 includes an information display unit 18, a peripheral display unit 19, and the like, and displays various information such as processing results by the CPU 20 in addition to data sent from the CPU 20, for example, current time data and date data.

  The receiving circuit unit 26 cuts unnecessary frequency components of the standard radio wave received by the bar antenna 11 and extracts a corresponding frequency signal, detects the frequency signal, and performs a time such as a standard time code, an integrated date code, and a day code. Data necessary for the correction function is extracted and output to the CPU 20.

  The azimuth detecting unit 23 includes two magnetic detection elements (not shown) whose magnetic detection directions are orthogonal to each other, and is based on the north direction (north north direction) indicated by the geomagnetism based on the magnetic force component detected from each. ) Can be calculated. In this case, the azimuth (current azimuth) of the 12 o'clock direction X is obtained by calculating the angle between the north and the 12 o'clock direction X with reference to the 12 o'clock direction X of the radio timepiece 1 shown in FIG. Output.

The time measuring circuit unit 25 includes an oscillation circuit 251, a frequency dividing circuit 252, and a time counting circuit 253, and is a circuit group that performs time measuring which is a main function as a timepiece.
The oscillation circuit 251 is configured by, for example, a crystal oscillator, and is a circuit that outputs a clock signal having a constant frequency to the frequency dividing circuit 252 at all times. The frequency dividing circuit 252 counts the clock signal input from the oscillation circuit 251 and outputs a 1-minute signal to the clock count circuit 253 every time the count value becomes a value corresponding to 1 minute. The clock count circuit 253 is a circuit that counts current time data such as the date of the day and the current hour / minute / second based on the 1-minute signal input from the frequency divider 252. As a result, the timing circuit unit 25 can count the date / time of the current year / month / day / hour / minute / second and output the date / time data to the CPU 20. Further, as will be described later as time correction processing, the CPU 20 corrects the current time data counted by the clock count circuit 253 as appropriate based on the standard time code.

  The input unit 24 is a push-type switch group for causing the radio-controlled timepiece 1 to execute various functions, and includes a radio wave receiving switch 151 for arbitrarily executing time correction processing manually, and a state for selecting and setting a location code (hereinafter, referred to as “the location code”). A place selection switch 152 that is called a place selection mode) and an azimuth measurement switch 153 that measures the azimuth of the radio timepiece 1.

  When the radio wave receiving switch 151 is pressed in the input unit 24, the CPU 20 that has recognized the pressing operation controls the receiving circuit unit 26 to execute standard radio wave reception processing, and the clock circuit 253 of the time measuring circuit unit 25. Is corrected, and the display unit 27 is controlled based on the corrected current time data to update the current time displayed on the time display unit 184 (FIG. 1) of the information display unit 18. .

  When the location selection switch 152 is pressed in the input unit 24, the CPU 20 that has recognized the pressing shifts the operating state of the radio timepiece 1 to the location selection mode. At this time, the CPU 20 controls the display unit 27 so that, for example, the location code display unit 182 (FIG. 1) of the information display unit 18 is blinked to clearly indicate that the radio timepiece 1 is in the location selection mode. Yes. In this place selection mode, when the place selection switch 152 is further pressed, the numerical value displayed as the place code is cyclically increased within a predetermined definition area. For example, in this embodiment, when the place selection switch 152 is sequentially pressed from the state where the place code display is “0” to increase it to “1”, “2”,. The place code display returns to “0” when the place selection switch 152 is pressed. Then, a desired place code is selected, the newly selected place code is displayed on the place code display section 182 of the information display section 18, and the selected place code is stored in the designated place code storage section 224 on the RAM 22. Code is written. Subsequent to this, the CPU 20 accesses the intensity storage unit 223 on the RAM 22 and reads out the radio wave intensity from the record (identified by the selected location code) stored in correspondence with the selected location code, The display unit 27 is controlled to display the read radio wave intensity value on the time display unit 184 of the information display unit instead of the time display for a temporary predetermined period (for example, 5 seconds).

  By the way, when the location code “0” is selected and set in the location selection mode, “0” is stored in the designated location code storage unit 224 on the RAM 22. In the present embodiment, when “0” is set as the location code as described above, it is handled that the location code is not set in various internal processes of the radio timepiece 1, and various types using the location code are used. The function is set to the off state. In this way, the radio timepiece 1 is provided with a means for setting off various functions using the location code to the user.

When the azimuth measurement switch 153 is pressed in the input unit 24, the CPU 20 that recognizes the pressing first controls the display unit 27 to display the azimuth measurement mode, and then controls the azimuth detection unit 23 to control the azimuth. Detection is performed, and the azimuth in the 12:00 direction (current azimuth) of the radio timepiece 1 and the west, south, and east directions excluding the north from the four directions are calculated using the north side indicated by the geomagnetism obtained by this detection. . Next, the CPU 20 displays the current direction of the radio timepiece 1 thus calculated on the time display unit 184 of the information display unit 18, and further corresponds to each of the four directions (north, west, south, and east) on the peripheral display unit 19. Display orientation graphics.
For example, when the north direction is detected in the direction of 120 ° east by the azimuth detection unit 23, the 12 o'clock direction of the radio-controlled timepiece 1 may be 120 ° west of 240 ° (240 ° east). Calculated. As shown in FIG. 1B, the time display unit 184 of the information display unit 18 displays “240 °”, and the peripheral display unit 19 corresponds to each of four directions (north, west, south, and east). The liquid crystal display is turned on to display the orientation graphics 19n, 19w, 19s, and 19e. In this example, the current azimuth is displayed at an integer angle of 0 ° or more and less than 360 ° with the eastern direction as the positive direction.

  Next, the entire processing operation of the radio timepiece 1 configured as described above will be described in detail with reference to the flowcharts shown in FIGS.

  When the power of the radio timepiece 1 is turned on, the CPU 20 reads the time correction processing program 211 and the switch processing program 212 stored in advance in the ROM 21, expands them in the RAM 22, and executes the time correction processing program 211. The time correction processing according to the embodiment is started, and the switch processing program 212 is executed as necessary for the time correction processing to perform switch processing subordinate to the time correction processing. Until the power of the timepiece 1 is turned off, the processing shown in FIGS. 4 and 5 is residently executed as the time correction processing and switch processing.

  As shown in FIG. 4, in the time adjustment process according to the present embodiment, the CPU 20 first determines whether or not it is 3:00 am based on the current time inputted from the clock circuit 253 of the clock circuit unit 25. (Step S2) If it is 3:00 am (Step S2: Yes), the process proceeds to Step S4, and radio wave reception processing (Steps S4 to S22) is started. On the other hand, if it is not 3:00 am (step S2: No), it will transfer to step S24.

  When it is 3:00 am (step S2: Yes), the CPU 20 detects the direction of the radio timepiece 1 by controlling the direction detection unit 23 (step S4), and determines the direction of the 12 o'clock direction detected in this direction detection. The current azimuth storage unit 221 on the RAM 22 stores the current azimuth.

  Next, the CPU 20 controls the reception circuit unit 26 to start reception of the standard radio wave (step S6), detects the radio wave intensity (step S8), and stores it as the current intensity in the current intensity storage unit 222 on the RAM 22. At the same time, the time data is demodulated (step S10).

  Here, when the processing of these steps S6 to S10 by the receiving circuit unit 26 has failed (step S12: No), the CPU 20 ends this series of radio wave reception processing (steps S4 to S22), and proceeds to step S24. Transition. On the other hand, when the processing of steps S6 to S10 by the receiving circuit unit 26 is successful (step S12: Yes), the CPU 20 in the time counting circuit 253 of the time measuring circuit unit 25 according to the time data demodulated in step S10. The counted current time data is corrected (step S14).

  Next, the CPU 20 reads the designated place code from the designated place code storage unit 224 of the RAM 22, and determines whether or not this is a value other than 0 (step S16).

  When the designated location code read from the RAM 22 is a value other than 0 (step S16: Yes), the CPU 20 accesses the strength storage unit 223 on the RAM 22, and the location code 2231 from the record group stored therein. The one that matches the specified location code (FIG. 3) is specified, and the optimum azimuth 2232 and radio wave intensity 2233 of the specified record are read (step S18). In the following description, the optimum azimuth 2232 and radio wave intensity 2233 of the identified record are referred to as the conventional strongest time azimuth and conventional intensity.

  Next, the CPU 20 compares the current intensity stored in the current intensity storage unit 222 on the RAM 22 with the conventional intensity obtained in step S18, whereby the radio wave whose current intensity has been obtained before (including the current). It is determined whether or not the intensity is the maximum (step S20).

  When it is determined that the current intensity is the maximum radio wave intensity obtained previously (step S20: Yes), the CPU 20 accesses the intensity storage unit 223 on the RAM 22, and the optimum orientation in the record specified in step S16. 2232 and the radio wave intensity 2233 are rewritten with the current azimuth and the current intensity (step S22). Then, the series of radio wave reception processing (steps S4 to S22) is finished and the process proceeds to step S24.

  On the other hand, in step S20, when it is not determined that the current intensity is the maximum as the radio wave intensity obtained before (including the current time) (step S20: No), the CPU 20 performs this series of radio wave reception processing (step After S4 to S22), the process proceeds to step S24.

  If the designated location code read from the designated location code storage unit 224 of the RAM 22 is 0 in step S16 (step S16: No), the CPU 20 ends this series of radio wave reception processing (steps S4 to S22). The process proceeds to S24.

  When the process proceeds to step S24, the CPU 20 executes a predetermined process described in detail later as a switch process (FIG. 5) (step S24), and proceeds to a display process (step S26). In this display process, the CPU 20 reads the designated place code from the designated place code storage unit 224 of the RAM 22 and the optimum azimuth 2232 in the record specified by the designated place code from the intensity storage unit 223, and each of the place codes of the display unit 27. The information is displayed on the display unit 182 and the optimum orientation display unit 183. Further, the CPU 20 obtains the current time and date from the clock count circuit 253 of the time measuring circuit unit 25 and displays them on the time display unit 184 and the date display unit 181 of the display unit 27, respectively. In addition to this, when the time is corrected in step S14, the CPU 20 controls the display unit 27 to display the entire liquid crystal display body (1900, 1901, ..., 1959) of the peripheral display unit 19 for a predetermined period (for example, 10 seconds). ) The user can easily detect that the time has been corrected by turning it on.

  When the display process (step S26) is completed, the CPU 20 returns to step S2, and thereafter repeats the processes of steps S2 to S26 described above. As described above, the CPU 20 in this embodiment repeats the switch process and the display process in a state other than executing a series of radio wave reception processes (steps S4 to S22) at 3 am, and monitors the pressing of the switch button. It can be said that it is waiting in such a state.

  Here, the switch process (step S24) during the time correction process will be described in detail below with reference to FIG.

  As shown in FIG. 5, in this switch process, the CPU 20 of the radio timepiece 1 first determines whether or not the pressed switch is the radio wave reception switch 151 (step S51).

  When the pressed switch is the radio wave reception switch 151 (step S51: Yes), the CPU 20 proceeds to the radio wave reception process of step S52, and a series of radio wave reception processes (step S4) in the previous time correction process (FIG. 4). To S22) (the description will be omitted because it will be repeated), the process returns to the time adjustment process (FIG. 4) and executes step S26 and subsequent steps (step S52).

  On the other hand, when determining that the pressed switch is not the radio wave reception switch 151 (step S51: No), the CPU 20 determines whether or not the pressed switch is the location selection switch 152 (step S53).

  When the pressed switch is the place selection switch 152 (step S53: Yes), the CPU 20 shifts the operating state of the radio timepiece 1 to the place selection mode. That is, the CPU 20 controls the display unit 27 so that the place code display unit 182 blinks. When the location selection switch 152 is further pressed, the display of the place code display unit 182 is changed from “0” to “1”, “2”. , ..., "9", "0", "1", "2", ..., "9", "0", "1", "2", ..., change cyclically The user can select the specified location code. The CPU 20 receives the selection of the designated location code by a predetermined determination operation (for example, pressing a switch other than the location selection switch 152 or continuing a no-operation state for a predetermined period (for example, 5 seconds)). The newly selected place code is stored in the designated place code storage unit 224 (in place of the place code stored so far) (step S54).

  Next, the CPU 20 accesses the strength storage unit 223 on the RAM 22, identifies a record corresponding to the location code newly selected in step S54 from the record group stored therein, and identifies the identified record. The optimum azimuth 2232 is read out and displayed on the optimum azimuth display unit 183 of the display unit 27, and the process returns to the time correction process (FIG. 4) to execute step S26 and subsequent steps (step S55).

  On the other hand, when determining that the pressed switch is not the location selection switch 152 (step S53: No), the CPU 20 determines whether or not the pressed switch is the direction measurement switch 153 (step S56).

  When the pressed switch is the azimuth measurement switch 153 (step S56: Yes), the CPU 20 first controls the display unit 27 to change to the azimuth measurement mode display (FIG. 1B). Then, the CPU 20 detects the direction of the radio timepiece 1 by controlling the direction detection unit 23, and stores the detected direction as the current direction in the current direction storage unit 221 on the RAM 22 (step S57).

Next, the CPU 20 controls the display unit 27 to display the current direction detected in step S57 as a numerical value (for example, in 60 minutes) on the time display unit 184, and further to the peripheral display unit 19 based on the current direction. An orientation graphic representing 4 orientations is displayed.
Next, in step S57, the CPU 20 determines whether or not the radio timepiece 1 is oriented in the optimum direction, that is, whether the difference between the detected current direction and the optimum direction of the identified record is within a predetermined angle, If the radio timepiece 1 is facing the optimum direction, the optimum direction 2232 of the optimum direction display unit 183 is displayed in a blinking manner (step S58), and the process returns to the time correction process (FIG. 4) to execute step S26 and subsequent steps.

  On the other hand, when the pressed switch is not the direction measurement switch 153 (step S56: No), this means that none of the radio wave reception switch 151, the location selection switch 152, and the direction measurement switch 153 is pressed. At this time, the CPU 20 executes a predetermined process such as a process for pressing a switch other than these.

  As described above, the radio timepiece 1 of the present invention measures the radio field intensity of the standard radio wave and the direction of the radio timepiece 1 when receiving the standard radio wave, and selectively stores the radio wave intensity having a higher radio wave intensity than before. By displaying this on the display unit 27, it is possible to indicate to the user the orientation of the radio timepiece 1 that is optimal for time correction.

  In the above-described embodiment, “0” to “9” are used as the place codes for the purpose of simple illustration. However, the present invention is not limited to this, and a larger number of records are stored in the strength storage unit 223. It may be possible to manage, and the place code display part of the display part 27 may be displayed in a larger number such as “00” to “99”, and more place codes may be handled.

  In the above-described embodiment, the previous optimum azimuth and radio wave intensity are distinguished and managed only by the location code. However, the present invention is not limited to this. For example, as shown in FIG. Using the intensity storage unit configured to identify records using bands, the previous optimum azimuth and radio wave intensity are classified for each time zone after classification for each location code, and the previous optimum azimuth and radio wave intensity are retained. And may be rewritten. In this case, it is possible to strictly cope with the change in radio direction due to the time zone at the same location. It is possible to realize a radio timepiece that can be shown in FIG.

  Furthermore, in the above-described embodiment, the optimum azimuth and the radio wave intensity held in the intensity storage unit are displayed on the display unit only for the specific location code set in the radio timepiece 1 by the user. The invention is not limited to this. For example, as shown in FIG. 7, a so-called summary record that holds an average for all location codes as the value of the optimum direction and a maximum value for all location codes as the radio wave intensity, respectively. 7 is provided so that only information on the summary record is displayed on the display unit that can be seen by the user, and records for all the location codes are processed internally. You may make it use only for. In this case, it is possible to realize a radio timepiece that does not force the user to perform an operation such as setting a designated location code.

It is a partially omitted plan view of a time data receiving device to which the present invention is applied. 2 is a block diagram showing a circuit configuration of the radio timepiece 1. FIG. 2 is a diagram showing a configuration of an intensity storage unit of the radio timepiece 1. FIG. It is a figure which shows the processing flow of the time correction process in the radio timepiece. FIG. 6 is a diagram showing a processing flow of switch processing in the radio timepiece 1. It is a figure which shows the structure of the intensity | strength memory | storage part in other embodiment. It is a figure which shows the structure of the intensity | strength memory | storage part in other embodiment.

Explanation of symbols

1 Radio clock 11 Bar antenna 152 Location selection switch 153 Direction measurement switch 20 CPU
211 Time correction processing program 223 Strength storage unit 23 Direction detection unit 24 Input unit 25 Timekeeping circuit unit 26 Reception circuit unit 27 Display unit X 12 o'clock direction

Claims (5)

Time counting means for counting current time information;
Direction detecting means for detecting the direction in which the specific position of the device is directed;
Detection direction display control means for displaying the direction detected by this direction detection means,
An antenna for receiving radio waves including time data;
Intensity detecting means for detecting the intensity of radio waves received by the antenna;
Correction means for extracting time data from radio waves received by the antenna and correcting current time information counted by the time counting means based on the time data;
Storage means for storing radio wave intensity and direction;
It is determined whether or not the intensity of the radio wave detected by the intensity detection unit at the time correction by the correction unit is the maximum among the radio field intensities detected at the previous time correction. A storage control means for associating the intensity and the azimuth detected by the azimuth detecting means when the maximum radio wave intensity is obtained, and storing it in the storage means;
An optimum azimuth display control means for reading out and displaying the azimuth corresponding to the radio field intensity determined as the maximum radio field intensity by the storage control means;
A time data receiving device comprising: It further comprises a place selection designation means for selecting and designating one place from a plurality of places,
The storage means is means for storing a maximum radio wave intensity and direction for each of the plurality of places,
The storage control means compares the newly detected radio wave intensity with the maximum radio wave intensity stored in the storage means in association with the one place, and the newly detected radio wave intensity is stronger. In this case, the storage means is means for storing the newly detected radio wave intensity and direction instead of the radio field intensity and direction corresponding to the one place stored so far.
The time data receiving apparatus according to claim 1. The storage means is means for storing the maximum radio wave intensity and direction corresponding to each of a plurality of time zones,
When the newly detected radio wave intensity is stronger than the newly detected radio wave intensity and the radio wave intensity stored corresponding to the current time zone, the control means It is a means for storing the newly detected radio field intensity and direction instead of the radio field intensity and direction stored so far.
The time data receiving apparatus according to claim 1. And further comprising means for clearly indicating whether or not the specific position of the device is directed to an orientation corresponding to the maximum intensity.
The time data receiving apparatus according to claim 1, wherein the time data receiving apparatus is a time data receiving apparatus. In the computer of the apparatus comprising the azimuth detecting means for detecting the azimuth to which the specific position of the own apparatus is directed, the antenna for receiving radio waves including time data, the storage means, and the computer,
A time counting function for counting current time information;
A detected orientation display control function for performing control to display the orientation detected by the orientation detection means;
An intensity detection function for detecting the intensity of radio waves received by the antenna;
A correction function for extracting time data from the radio wave received by the antenna and correcting the current time information counted by the time counting function based on the extracted time data;
It is determined whether or not the intensity of the radio wave detected by the intensity detection function at the time correction by the correction function is the maximum of the radio wave intensity detected at the previous time correction. A storage control function for associating the intensity and the direction detected by the direction detection unit when the maximum radio wave intensity is obtained, and storing it in the storage unit;
An optimum azimuth display control function for performing control to read out and display the azimuth corresponding to the radio field intensity determined to be the maximum radio field intensity by the storage control function;
A program to realize

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