JP2007166001A - Antenna and antenna system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology of adjusting the attitude of an antenna so as to detect the optimum attitude for providing excellent reception sensitivity thereby improving reception sensitivity of a radio wave. <P>SOLUTION: The state of the antenna 30 supported in parallel with a dial plate 21 in the length direction along the direction of the X axis is made an ordinary state and the antenna 30 is tilted within a tilt angle range of -θmax and θmax. For example, when a piezoelectric element 51-1 is elongated and deformed and a piezoelectric element 51-2 is contracted and deformed, one end of the antenna 30 is pushed up by the piezoelectric element 51-1 to be moved in a positive Z axis direction and the other end of the antenna 30 is pulled by the piezoelectric element 51-2 to be moved in a negative Z axis direction, resulting in that a core axial line direction is tilted. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an antenna and an antenna device that receive radio waves.

  2. Description of the Related Art Conventionally, a radio timepiece that receives time information, that is, a long wave standard radio wave (standard radio wave) including a time code and corrects the timekeeping time has been put into practical use, and has been commercialized as a wristwatch or a wall clock.

Of course, a radio timepiece of a wristwatch has a built-in antenna for receiving radio waves. However, there is a problem that reception sensitivity varies greatly depending on the location and orientation when receiving radio waves. As a technique made to solve this problem, there is a technique of Patent Document 1. This patent document 1 discloses a technique for improving the radio wave reception sensitivity by detecting the direction of a radio wave base station (transmitting station) and directing the antenna to the detected direction.
Japanese Patent Laid-Open No. 2003-167074

However, the technique of Patent Document 1 changes the position in a plane parallel to the dial face by rotating the antenna around the central axis of the watch body. Therefore, the attitude of the antenna itself is not adjusted by tilting the antenna or the like to detect an attitude with good reception sensitivity.
The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to detect an optimal attitude with good reception sensitivity by adjusting the attitude of an antenna and improve radio wave reception sensitivity.

In order to solve the above problems, the antenna of the invention according to claim 1 is:
A rod-shaped core made of a magnetic material (for example, the core 31 in FIG. 2);
A winding wound around the core (for example, winding 33 in FIG. 2);
With
The core is inclined, and the core axis direction is inclined.

The invention according to claim 2 is the antenna according to claim 1,
Furthermore, it is characterized by rotating in the horizontal direction around the center of the core.

The antenna device of the invention according to claim 3 is:
Time information is obtained by an antenna (for example, the antenna 30 in FIG. 2) having a rod-shaped core (for example, the core 31 in FIG. 2) and a winding (for example, the winding 33 in FIG. 2) wound around the core. Receiving means (for example, reception control circuit unit 130 in FIG. 5; step a50 in FIG. 6) for receiving radio waves including the radio wave;
Reception intensity detection means (for example, reception level detection circuit 138 in FIG. 5; step a60 in FIG. 6) for detecting the reception intensity of the radio wave received by the reception means;
Antenna moving means for tilting the antenna (for example, CPU 110 in FIG. 4, antenna attitude adjustment mechanism 120a; steps a20 and a140 in FIG. 6);
Storage means for storing a predetermined reception intensity value (for example, reception regulation level 220 in FIG. 4);
Comparing means (for example, CPU 110 in FIG. 4; steps a60 and a70 in FIG. 6) for comparing the received intensity detected by the received intensity detecting means with the received intensity value stored in the storage means;
With
As a result of the comparison by the comparison means, when the reception intensity detected by the reception intensity detection means is larger than the reception intensity value stored in the storage means, time information is extracted from the radio wave received by the reception means ( For example, it is characterized by the CPU 110 in FIG. 4; steps a70 (YES) and a80 in FIG.

The invention according to claim 4 is the antenna device according to claim 3,
Horizontal moving means (for example, CPU 110 in FIG. 12; step c40 in FIG. 13 and step c210 in FIG. 14) for rotating the antenna in the horizontal direction with the central portion of the core as the rotation center is provided. It is said.

The antenna device of the invention according to claim 5 is:
Receiving means for receiving radio waves including time information by an antenna having a rod-shaped core (for example, core 31 in FIG. 2) and a winding wound around the core (for example, winding 33 in FIG. 2) ( For example, the reception control circuit unit 130 in FIG. 5; step b50) in FIG.
Reception intensity detection means (for example, reception level detection circuit 138 in FIG. 5; step b60 in FIG. 8) for detecting the reception intensity of the radio wave received by the reception means;
Antenna moving means for tilting the antenna (for example, CPU 110 in FIG. 4, antenna attitude adjustment mechanism 120a; steps b20 and b80 in FIG. 8);
Storage means (for example, sampling data in FIG. 7; step b60 in FIG. 8) for storing the reception intensity detected by the reception intensity detection means in association with the amount of inclination of the antenna tilted by the antenna moving means When,
Extraction means (for example, CPU 110 in FIG. 4; step b90 in FIG. 8) for extracting the amount of inclination of the antenna corresponding to the largest reception intensity among the reception intensities stored by the storage means;
With
Time information is extracted from the radio wave received by the receiving means in a state where the antenna is tilted based on the tilt amount of the antenna extracted by the extracting means (for example, CPU 110 in FIG. 4, antenna attitude adjustment). Mechanism 120a; steps b100 and b110) of FIG.

The invention according to claim 6 is the antenna device according to claim 5,
Horizontal moving means (for example, CPU 110 in FIG. 12; steps d40 and d50 in FIG. 16) for rotating the antenna in a horizontal direction with the central portion of the core as a rotation center,
The storage means stores the received intensity detected by the received intensity detecting means in further correspondence with the amount of horizontal rotation of the antenna rotated by the horizontal movable means (for example, FIG. 12). CPU 110; step d80) of FIG.
The extraction means extracts the inclination amount of the antenna and the rotation amount of the antenna in the horizontal direction corresponding to the largest reception intensity among the reception intensities stored by the storage means (for example, CPU 110 in FIG. 12; Step d160) in FIG.
The antenna is tilted based on the amount of tilt of the antenna extracted by the extracting means, and is received by the receiving means in a state where the antenna is rotated based on the amount of rotation of the antenna in the horizontal direction. Time information is extracted from the received radio waves (for example, CPU 110 in FIG. 12; steps d170 to d190 in FIG. 17).

The invention according to claim 7 is the antenna device according to any one of claims 3 to 6,
The core constituting the antenna is formed by laminating thin plates made of amorphous.

  According to the first aspect of the present invention, since the core of the antenna is inclined and the core axial direction is inclined, the attitude of the antenna can be adjusted.

  According to the invention described in claim 2, since the antenna further rotates in the horizontal direction around the center of the core, the antenna is inclined and rotated in the horizontal direction around the center of the core. It is possible to adjust the attitude of the antenna.

  According to the invention described in claim 3, the attitude of the antenna can be adjusted by tilting the antenna. Then, the reception intensity of the radio wave including the received time information is detected, and the time information can be extracted when the detected reception intensity is larger than a predetermined reception intensity value. Therefore, since the optimum attitude with good reception sensitivity can be detected by adjusting the attitude of the antenna, the radio wave reception sensitivity can be improved.

  According to the fourth aspect of the present invention, the antenna can be rotated in the horizontal direction. Therefore, the posture can be adjusted not only by the tilting operation of the antenna but also by the turning operation in the horizontal direction, and the radio wave reception sensitivity can be further improved.

  According to the fifth aspect of the invention, the attitude of the antenna can be adjusted by tilting, and the reception intensity can be detected by receiving radio waves including time information by the tilted antenna. . The tilt amount of the antenna can be stored in correspondence with the detected reception intensity. Then, the amount of tilt of the antenna corresponding to the largest received strength among the stored received strengths is extracted, and time information is obtained from the radio wave received with the antenna tilted based on the extracted tilt amount. Can be extracted. Therefore, it is possible to detect the optimum antenna tilt amount with good reception sensitivity, and it is possible to improve the radio wave reception performance.

  According to the invention described in claim 6, the antenna can be rotated in the horizontal direction. The amount of rotation of the antenna that has been rotated in the horizontal direction can be stored in correspondence with the detected reception intensity. Then, the antenna tilt amount and the horizontal rotation amount corresponding to the largest received strength among the stored reception strengths are extracted, and the antenna is selected based on the extracted tilt amount and horizontal rotation amount. Time information can be extracted from radio waves received in a state of tilting and rotating. Therefore, since the optimum antenna tilt amount and horizontal rotation amount with good reception sensitivity can be detected, the radio wave reception performance can be further improved.

  According to the seventh aspect of the present invention, the core constituting the antenna can be formed of the amorphous material which is a magnetic material having good reception sensitivity.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. In the following, a wristwatch-type radio timepiece (hereinafter simply referred to as “radio timepiece”) to which the present invention is applied will be described as an example. However, the present invention can be similarly applied to other devices for receiving radio waves.

  FIG. 1A is a schematic longitudinal sectional view of the radio timepiece main body, and FIG. 1B is a schematic cross sectional view of the radio timepiece main body. As shown in FIG. 1, the radio-controlled timepiece 100a includes, for example, a metal-made timepiece case 11, and a band (not shown) for attaching to the wrist of the user is attached to the timepiece case 11.

  The watch case 11 has an annular shape and houses the watch module 20 therein. A watch glass 13 is fitted in the upper center of the watch case 11 via a packing 15 so that the internal dial 21 can be seen, and a back made of the same metal as the watch case 11 in the lower center. A lid 15 is attached.

  Magnetic sheets 41 and 43 for suppressing deterioration of the reception sensitivity of the standard radio wave by the antenna 30 are bonded to the inner peripheral surface of the watch case 11 and the inner surface of the back cover 15 in the vicinity of the antenna 30 by pasting or the like. ing. The magnetic sheets 41 and 43 are resin sheets mixed with a magnetic material such as amorphous or ferrite, and have a magnetic permeability that is higher in relative permeability and lower in electrical conductivity than the metal forming the watch case 11 and the back cover 15. It is a member.

  The timepiece module 20 is arranged between the dial 21 and the back cover 15, and an analog pointer mechanism for moving the hand 30 on the dial 21 such as an antenna 30 for receiving a standard radio wave and an hour hand 23 and a minute hand. The circuit board and the like for controlling the antenna 30 and the analog pointer mechanism by connecting them are housed inside. Although details will be described later, the antenna 30 is a bar antenna, and is configured to receive, for example, a 40 kHz JJY standard radio wave and a 60 kHz JJY standard radio wave.

  Here, the longitudinal direction of the antenna 30 is defined as the X-axis direction, the direction orthogonal to the dial 21 is defined as the Z-axis direction, and the direction orthogonal to both the X-axis direction and the Z-axis direction is defined as the Y-axis direction. For each axial direction, the direction indicated by the arrow in FIG. 1 is referred to as a positive direction, and the opposite direction is referred to as a negative direction.

[First Embodiment]
First, the first embodiment will be described. The radio timepiece of the first embodiment includes an antenna attitude adjustment mechanism 120a (details will be described later) for tilting the antenna 30.

  FIG. 2 is a view for explaining the configuration of the antenna attitude adjustment mechanism 120a in the first embodiment. FIG. 2A is a view of the watch case 11 in which the dial 21 is cut away to show the internal configuration around the antenna 30. FIG. FIG. 2B is a cross-sectional view of the main part, and FIG. Here, the antenna 30 is a bar antenna as described above, and a rod-shaped core 31 formed by laminating thin plates made of a magnetic material such as amorphous, and a winding of copper or the like wound around the core 31. And a line 33.

  The antenna attitude adjustment mechanism 120 a of the first embodiment includes piezoelectric actuators 50-1 and 50-2 disposed below both ends of the core 31. The piezoelectric actuators 50-1 and 50-2 support the antenna 30 by being fixed to a circuit board that controls the antenna 30 and the analog pointer mechanism.

  The piezoelectric actuator 50-1 includes a piezoelectric element 51-1 connected to one end of the core 31, and an application unit 53-1 provided on the bottom surface of the piezoelectric element 51-1, for applying a voltage to the piezoelectric element 51-1. The piezoelectric actuator 50-2 includes a piezoelectric element 51-2 connected to the other end of the core 31, and an application unit 53- provided on the bottom surface of the piezoelectric element 51-2 to apply a voltage to the piezoelectric element 51-2. 2 is provided.

  The piezoelectric elements 51-1 and 51-2 are each formed into a cylindrical shape from a known piezoelectric material such as a piezoelectric element, and are expanded and contracted in the Z-axis direction according to the voltage applied by the applying means 53-1 and 53-2. To do. The antenna attitude adjustment mechanism 120a tilts the antenna 30 by the expansion and contraction of the piezoelectric elements 51-1, 51-2.

  Here, the tilting operation of the antenna 30 will be described with reference to FIG. 3A is a diagram illustrating a normal state of the antenna 30, FIG. 3B is a diagram illustrating an uppermost tilt state, and FIG. 3C is a diagram illustrating a lowermost tilt state. As shown in FIG. 3 (a), the antenna 30 is tilted as indicated by a one-dot chain line in FIG. 3 (a), assuming that the longitudinal direction of the antenna 30 is supported in parallel with the dial 21 and is along the X-axis direction. The tilting operation is performed within the range of the amount −θmax to θmax.

  For example, when the piezoelectric element 51-1 is extended and deformed and the piezoelectric element 51-2 is contracted and deformed, one end of the antenna 30 is pushed up by the piezoelectric element 51-1 in the positive Z-axis direction (above FIG. 3A). The other end side of the antenna 30 is pulled by the piezoelectric element 51-2 and moved in the negative Z-axis direction (downward in FIG. 3A), and the core axis direction is inclined. If the core axis direction of the antenna 30 is inclined by θmax, the uppermost inclined state shown in FIG.

  On the other hand, when the piezoelectric element 51-1 is contracted and deformed and the piezoelectric element 51-2 is expanded and deformed, the other end of the antenna 30 is pushed up by the piezoelectric element 51-2 and moves in the positive Z-axis direction. One end side of the antenna 30 is pulled by the piezoelectric element 51-1 and moves in the negative Z-axis direction, and the core axis direction of the antenna 30 is inclined. If the core axis direction of the antenna 30 is tilted by −θmax, the lowest tilted state shown in FIG.

  According to this antenna attitude adjustment mechanism 120 a, even when the direction of the magnetic field is deviated from the direction of the antenna 30, the standard radio wave reception sensitivity can be increased by tilting the antenna 30. In the first embodiment, the antenna attitude adjustment mechanism 120a described above causes the antenna 30 to be tilted in order at predetermined angles to receive standard radio waves, detect the attitude of the antenna having a high reception level, and demodulate the standard radio waves. And time information is extracted.

[Function configuration]
Next, a functional configuration of the radio timepiece 100a according to the first embodiment will be described. FIG. 4 is a block diagram illustrating an example of a functional configuration of the radio timepiece 100a. As shown in FIG. 4, the radio-controlled timepiece 100a includes functions of a CPU 110, an antenna attitude adjustment mechanism 120a, a reception control circuit unit 130, an oscillation circuit unit 140, a timing circuit unit 150, an input unit 160, a display unit 170, a RAM 180, and a ROM 200a. It is comprised with the part.

  The CPU 110 reads out a program stored in the ROM 200a in accordance with a predetermined timing, an operation signal input from the input unit 160, and the like, expands the program in the RAM 180, executes processing based on the program, and sends it to each functional unit. Instructions and data transfer. For example, a switching signal for switching the frequency of a standard radio wave to be received is output to a tuning switching circuit 131 to be described later, and extracted from a control for switching the reception frequency of the antenna 30 or a time code signal input from the reception control circuit unit 130. A process for correcting the time based on the time information is performed. Specifically, the CPU 110 corrects the current time measured by the time measuring circuit unit 150 based on the extracted time information, and controls the analog pointer mechanism to indicate the corrected current time to move the pointer 23. Process.

  The antenna attitude adjustment mechanism 120a includes piezoelectric actuators 50-1 and 50-2 and application units 53-1, 53-2, and inclines the antenna 30 in order for each predetermined angle according to the control of the CPU 110, thereby causing a core axis line. Tilt the direction.

  The reception control circuit unit 130 cuts out unnecessary frequency components of the standard radio wave received by the antenna 30 and takes out the corresponding frequency signal, converts this frequency signal into an electric signal, and outputs it to the CPU 110.

  FIG. 5 is a block diagram illustrating an example of the configuration of the reception control circuit unit 130. According to FIG. 5, the reception control circuit unit 130 includes a tuning switching circuit 131, an AGC amplifier 132, a filter circuit 133, a post amplifier 134, a detection rectifier circuit 135, a waveform shaping circuit 136, and an AGC voltage control circuit. 137 and a reception level detection circuit 138.

For example, when receiving a JJY standard radio wave, the tuning switching circuit 131 switches the reception frequency of the antenna 30 to 40 kHz or 60 kHz according to a switching signal input from the CPU 110.
The AGC amplifier 132 amplifies or attenuates the radio wave signal (reception signal) input from the tuning switching circuit 131 according to the control signal input from the AGC voltage control circuit 137 and outputs the amplified signal.
The filter circuit 133 is a BPF having a very narrow passband, and is configured by a crystal filter, for example. The filter circuit 133 passes a signal in a predetermined frequency range with respect to the signal input from the AGC amplifier 132, and blocks and outputs a frequency component outside the range.
The post amplifier 134 amplifies the signal input from the filter circuit 133 to a predetermined signal level and outputs the amplified signal.
The detection rectification circuit 135 detects and outputs a signal input from the post amplifier 134.
The waveform shaping circuit 136 shapes the detection signal input from the detection rectification circuit 135 and outputs it. The time code signal (TCO) output after waveform shaping by the waveform shaping circuit 136 is input to the CPU 110.
The AGC voltage control circuit 137 outputs a control signal that adjusts the amplification degree of the AGC amplifier 132 in accordance with the signal level of the detection signal input from the detection rectification circuit 135.

  The reception level detection circuit 138 detects the reception intensity of the standard radio wave received by the antenna 30 based on the signal level of the detection signal input from the detection rectification circuit 135, and uses the detected reception intensity as the reception level. Output. The reception level output from the reception level detection circuit 138 is input to the CPU 110.

Returning to FIG. The oscillation circuit unit 140 includes a crystal oscillator, and always outputs a clock signal having a constant frequency.
The clock circuit unit 150 counts the clock signal input from the oscillation circuit unit 140 to clock the current time, and outputs the current time data to the CPU 110.

  The input unit 160 includes an operation switch or the like for the user to input various operations, and outputs an operation signal corresponding to an input from the operation switch or the like to the CPU 110.

  The display unit 170 includes a dial, an analog pointer mechanism controlled by the CPU 110, and the like, and displays the current time measured by the timing circuit unit 150.

  The RAM 180 includes a memory area for temporarily storing various programs executed by the CPU 110 and data related to the execution of these programs, and is used as a work area of the CPU 110. In particular, in order to realize the first embodiment, a reception time storage area 181 that holds a reception time is provided. In this reception time storage area 181, a predetermined reception time (for example, midnight) is set as an initial value.

  The ROM 200a stores various initial setting values and initialization programs, as well as programs and data for realizing various functions of the radio timepiece 100a. In particular, in order to realize the first embodiment, a control program 210a including a first time correction program 211 and a time code conversion program 213, and a reception regulation level 220 are stored.

  For example, the first time correction program 211 controls the antenna 30 and the reception control circuit unit 130 to receive the standard radio wave when the current time becomes the reception time, and receives the time code input from the reception control circuit unit 130. This is a program for correcting the current time measured by the time measuring circuit unit 150 based on the signal, and the CPU 110 executes a first time adjustment process according to the first time adjustment program 211.

  In the first time correction process, the CPU 110 controls the antenna attitude adjustment mechanism 120a and performs control for tilting the core axis direction by sequentially tilting the antenna 30 every predetermined angle. Specifically, for example, a correspondence relationship between the tilt amount (θ) of the antenna 30 and the voltages applied to the piezoelectric elements 51-1 and 51-2 is defined in advance. Then, the CPU 110 controls the voltage applied by the applying units 53-1 and 53-2 according to the above-described correspondence relationship, and tilts the core axis direction of the antenna 30.

  Then, when the reception level input from the reception level detection circuit 138 is equal to or higher than the reception regulation level 220, the CPU 110 performs processing for demodulating the standard radio wave and extracting time information.

  The time code conversion program 213 is a program for demodulating the received standard radio wave and shaping the waveform into a time code signal. The CPU 110 controls the reception control circuit unit 130 according to the time code conversion program 213 to convert the time code. Execute the process.

  The reception regulation level 220 is a reception level serving as a reference when determining whether to start processing for extracting time information by demodulating the received standard radio wave, and is set in advance.

[Process flow]
Next, the flow of the first time correction process will be described. FIG. 6 is a flowchart for explaining the flow of the first time correction process. Note that the processing described here is realized by the CPU 110 reading and executing the first time correction program 211.

  In the first time correction process, the CPU 110 first refers to the reception time storage area 181 to determine whether it is a reception time. When the current time is the reception time set in advance in the reception time storage area 181 (step a10: YES), the CPU 110 controls the antenna attitude adjustment mechanism 120a and tilts the core axis direction of the antenna 30 by θmax. Control is started (step a20). If the antenna 30 is tilted to the uppermost tilted state (step a30: YES), the CPU 110 selects a standard radio wave transmission station according to the user operation (step a40), and receives the control circuit based on the selected transmission station. The unit 130 is controlled to start receiving standard radio waves (step a50).

  Subsequently, the CPU 110 determines the reception level input from the reception level detection circuit 138 (step a60). Specifically, the CPU 110 compares the received reception level with the reception regulation level 220. If the reception level is equal to or higher than the reception regulation level 220 (step a70: YES), the CPU 110 reads the time code conversion program 213 and converts the time code. The process is executed, and the process for extracting the time information by demodulating the received standard radio wave is started (step a80).

  Then, the CPU 110 determines whether or not the reception of the standard radio wave is successful based on the result of the time information extraction process. If the reception is successful (step a90: YES), the reception of the standard radio wave is stopped (step a100). Then, the CPU 110 corrects the current time according to the extracted time information (step a110), and ends the first time correction process.

  On the other hand, as a result of comparing the reception level input from the reception level detection circuit 138 with the specified reception level 220, it is determined that the reception level is less than the specified reception level 220 (step a70: NO), or the result of determining whether the standard radio wave is successfully received. If it is determined that the reception has failed (step a90: NO), the process proceeds to step a130.

  That is, the CPU 110 determines whether the antenna 30 is in the lowest tilt state. If it is not in the lowest tilt state (step a130: NO), the CPU 110 controls the antenna attitude adjustment mechanism 120a to perform control for tilting the core axis direction of the antenna 30 by a predetermined angle in the direction of the lowest tilt state. (Step a140), the process returns to step a10 to execute the above-described processing.

  In addition, when the core axis direction of the antenna 30 has already been tilted by −θmax and is in the lowest tilted state (step a130: YES), the CPU 110 stops receiving the standard radio wave (step a150). Then, the CPU 110 changes the reception time to a time one hour after the current time, updates the reception time storage area 181 (step a160), returns to step a10, and enters a standby state until the reception time.

  As described above, according to the first embodiment, the antenna 30 can be tilted. Then, the reception level of the standard radio wave received by the antenna 30 is detected, and when the reception level is equal to or higher than the predetermined reception regulation level 220, the received standard radio wave is demodulated to extract time information, and the extracted time information The current time can be corrected according to Therefore, it is possible to detect the optimum attitude with good reception sensitivity by adjusting the attitude of the antenna, and thus the reception sensitivity of the standard radio wave can be improved.

  In the first embodiment described above, the attitude of the antenna 30 at which the reception level is equal to or higher than the reception regulation level 220 is detected while the antenna 30 is tilted at every predetermined angle, and the time is corrected. You may do it.

  That is, as preprocessing for time correction, the antenna 30 is tilted in order at predetermined angles, the reception level of the standard radio wave is detected, sampling data is generated, and stored in the RAM 180. FIG. 7 is a diagram illustrating a data configuration example of sampling data in the present modification. This sampling data is a data table in which the reception level is associated with the inclination amount (θ), and the CPU 110 determines the reception level input from the reception level detection circuit 138 as the inclination amount (θ) of the antenna 30 at the present time. The data is stored in the RAM 180 as sampling data.

  Then, referring to the generated sampling data, the antenna 30 is tilted according to the tilt amount (θ) of the antenna 30 having the highest reception level, the standard radio wave received in this state is demodulated, time information is extracted, and the current time is extracted. It is good also as correcting.

  In this case, the CPU 110 executes a second time process described below instead of the first time correction process. FIG. 8 is a flowchart for explaining the flow of the second time correction process.

  In the second time correction process, the CPU 110 refers to the reception time storage area 181 to determine whether it is a reception time. When the current time becomes the reception time set in advance in the reception time storage area 181 (step b10: YES), the CPU 110 controls the antenna attitude adjustment mechanism 120a to change the core axis direction of the antenna 30. Control for tilting θmax is started (step b20). If the antenna 30 is tilted to the uppermost tilted state (step b30: YES), the CPU 110 selects a standard radio wave transmitting station according to the user operation (step b40), and receives control circuit based on the selected transmitting station. The unit 130 is controlled to start receiving standard radio waves (step b50).

  Next, the CPU 110 stores the reception level input from the reception level detection circuit 138 in the RAM 180 as the above-described sampling data in association with the current inclination amount (θ) of the antenna 30 (step b60).

  Subsequently, the CPU 110 determines whether or not the antenna 30 is in the lowest tilt state. If it is not the lowest tilted state (step b70: NO), the CPU 110 controls the antenna attitude adjusting mechanism 120a to perform control for tilting the core axis direction of the antenna 30 by a predetermined angle in the direction of the lowest tilted state. (Step b80), the process returns to step b60 to execute the above-described processing.

  On the other hand, when the core axis direction of the antenna 30 has already been tilted by −θmax and is in the lowest tilted state (step b70: YES), the CPU 110 corresponds to the highest reception level based on the generated sampling data. The amount of inclination (θ) to be extracted is extracted (step b90). Next, the CPU 110 controls the antenna attitude adjustment mechanism 120a and performs control for tilting the core axis direction of the antenna 30 according to the extracted tilt amount (θ) (step b100).

  Then, the CPU 110 reads the time code conversion program 213 and executes time code conversion processing, and starts processing for demodulating the received standard radio wave and extracting time information (step b110).

  Then, the CPU 110 determines whether or not the standard radio wave has been successfully received based on the result of the time information extraction process. If the reception is successful (step b120: YES), the CPU 110 stops receiving the standard radio wave (step b130). Then, the CPU 110 corrects the current time according to the extracted time information (step b140), and ends the second time correction process.

  On the other hand, if the CPU 110 determines that the reception has failed (step b120: NO), the CPU 110 stops receiving the standard radio wave (step b160). Then, the CPU 110 changes the reception time to a time one hour after the current time, updates the reception time storage area 181 (step b170), returns to step b10, and enters a standby state until the reception time.

  According to this modification, as pre-processing for time correction, the attitude of the antenna 30 is adjusted by tilting, the reception level of the standard radio wave received by the tilted antenna 30 is detected, and the sampling data Can be generated. Then, with reference to the generated sampling data, the standard radio wave received with the antenna 30 tilted according to the tilt amount (θ) having the largest reception level is demodulated, and time information is extracted to correct the current time. Can do. Therefore, the optimal amount of tilt (θ) of the antenna 30 with good reception sensitivity is detected in advance, and the time information is extracted by demodulating the standard radio wave after tilting the core axis direction of the antenna 30 according to the detected amount of tilt (θ). Therefore, it is possible to improve the reception performance of standard radio waves.

[Second Embodiment]
Next, a second embodiment will be described. In addition, below, about the part similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. The radio timepiece of the second embodiment includes an antenna attitude adjustment mechanism 120b (details will be described later) for tilting the antenna 30 and rotating the antenna 30 in the horizontal direction.

  FIG. 9 is a view for explaining the configuration of the antenna attitude adjustment mechanism 120b in the second embodiment. FIG. 9A is a view of the watch case 11 showing the internal configuration around the antenna 30 with the dial 21 cut away. FIG. 2B is a cross-sectional view of the main part, and FIG.

  The antenna 30 of the second embodiment includes a rod-shaped core 31 formed by laminating thin plates made of a magnetic material such as amorphous, and a winding 33 made of copper or the like wound around the core 31. It is attached to a frame body 37 so as to be tiltable through a shaft 35 integrally formed with 31, and is supported so as to be rotatable about the shaft 35. The frame body 37 is disposed between the dial 21 and the circuit board that controls the antenna 30 and the analog pointer mechanism via the shaft 39, and is supported so as to be rotatable about the shaft 39.

  The antenna attitude adjustment mechanism 120b according to the second embodiment includes piezoelectric actuators 60-1 and 60-2 disposed below both ends of the core 31, and piezoelectric actuators disposed on both sides of the core 31. 60-3, 60-4. For example, the piezoelectric actuators 60-1 and 60-2 are fixed to a circuit board, and the piezoelectric actuators 60-3 and 60-4 are fixed to a side wall inside the timepiece module.

  The piezoelectric actuators 60-1 to 60-4 are respectively piezoelectric elements 61-1 to 61-4 that are in contact with the end portions of the core 31, and application means 63 that applies voltages to the piezoelectric elements 61-1 to 61-4. -1 to 63-4.

  The piezoelectric elements 61-1 and 61-2 expand and contract in the Z-axis direction according to the voltage applied by the applying units 63-1 and 63-2, as in the first embodiment. The antenna attitude adjustment mechanism 120b tilts the antenna 30 by the expansion and contraction of the piezoelectric elements 61-1 and 61-2. On the other hand, the piezoelectric elements 61-3 and 61-4 expand and contract in the Y-axis direction according to the voltage applied by the applying means 63-3 and 63-4. The antenna attitude adjustment mechanism 120b rotates the antenna 30 by the expansion and contraction of the piezoelectric elements 61-3 and 61-4.

  First, the tilting operation of the antenna 30 will be described with reference to FIG. 10A is a diagram illustrating a normal state of the antenna 30, FIG. 10B is a diagram illustrating the uppermost tilted state, and FIG. 10C is a diagram illustrating the lowermost tilted state. As shown in FIG. 10A, the antenna 30 is supported in parallel with the dial 21 in the longitudinal direction and the state along the X-axis direction is a normal state, as in the first embodiment. The tilting operation is performed within the range of the tilt amount −θmax to θmax indicated by the one-dot chain line.

  That is, if the piezoelectric element 61-1 is extended and deformed, and the piezoelectric element 61-2 is contracted and deformed, the core axis direction is inclined and the antenna 30 core axis direction is inclined by θmax. It will be in the upper graded state. On the other hand, when the piezoelectric element 61-1 is contracted and deformed, and the piezoelectric element 61-2 is expanded and deformed, the core axis direction is inclined, and the core axis direction of the antenna 30 is inclined by −θmax, as shown in FIG. It becomes the lowest slope state.

  Next, the rotation operation of the antenna 30 will be described with reference to FIG. 11A is a diagram illustrating a normal state of the antenna 30, FIG. 11B is a diagram illustrating a leftmost rotation state, and FIG. 11C is a diagram illustrating a rightmost rotation state. As shown in FIG. 11A, the antenna 30 has a rotation amount −δmax to δmax indicated by a one-dot chain line in FIG. 11A with the state where the longitudinal direction of the antenna 30 is along the 39-axis direction as a normal state. It is rotated around the shaft 39 within the range.

  For example, when the piezoelectric element 61-3 is contracted and deformed, and the piezoelectric element 61-4 is expanded and deformed, the other end side of the antenna 30 moves in the negative Y-axis direction (lower side of FIG. 11 as the piezoelectric element 61-4 expands and deforms). 11), one end side of the antenna 30 moves in the positive Y-axis direction (upward in FIG. 11) with the contraction deformation of the piezoelectric element 61-3, and the counterclockwise rotation of FIG. Rotate in the direction. If the antenna 30 is rotated by δmax, the leftmost rotation state shown in FIG.

  On the other hand, when the piezoelectric element 61-3 is expanded and deformed and the piezoelectric element 61-4 is contracted and deformed, one end of the antenna 30 moves in the negative Y-axis direction along with the expansion and deformation of the piezoelectric element 61-3, and the antenna The other end of 30 moves in the positive Y-axis direction along with the contraction deformation of the piezoelectric element 61-4, and rotates in the clockwise direction of FIG. If the antenna 30 is rotated by −δmax, the rightmost rotation state shown in FIG.

  According to the antenna attitude adjustment mechanism 120b, even when the direction of the magnetic field is deviated from the direction of the antenna 30, the reception sensitivity of the standard radio wave is increased by tilting and rotating the antenna 30. Can do. In the second embodiment, the antenna attitude adjustment mechanism 120b described above causes the antenna 30 to be tilted in order for each predetermined angle, and is rotated in order for each predetermined angle to receive standard radio waves. The attitude is detected, the standard radio wave is demodulated, and time information is extracted.

[Function configuration]
FIG. 12 is a block diagram illustrating an example of a functional configuration of the radio timepiece 100b according to the second embodiment. In the second embodiment, the radio timepiece 100b includes a CPU 110, an antenna attitude adjustment mechanism 120b, a reception control circuit unit 130, an oscillation circuit unit 140, a clock circuit unit 150, an input unit 160, a display unit 170, a RAM 180, and a ROM 200b. It is configured with.

  In the second embodiment, the antenna attitude adjustment mechanism 120b includes the piezoelectric actuators 60-1 to 60-4 and the application units 63-1 to 63-4 shown in FIG. 9, and the antenna 30 is controlled according to the control of the CPU 110. The core 30 is tilted in order at every predetermined angle to tilt the core axis direction, and the antenna 30 is rotated in order at every predetermined angle to rotate in the horizontal direction.

  The ROM 200b of the radio timepiece 100b stores a control program 210b including a third time correction program 212 and a time code conversion program 213 and a reception regulation level 220 in order to realize the second embodiment.

  As in the first embodiment, the third time correction program 212 controls the antenna 30 and the reception control circuit unit 130 to receive standard radio waves when the current time becomes the reception time, for example, and receives the standard radio wave. This is a program for correcting the current time measured by the timing circuit unit 150 based on the time code signal input from the unit 130, and the CPU 110 executes a third time correction process according to the third time correction program 212. To do.

  In this third time adjustment process, the CPU 110 controls the antenna attitude adjustment mechanism 120b, performs the control for tilting the antenna 30 in order at every predetermined angle to incline the core axis direction, and the antenna 30 at every predetermined angle. Are controlled in order to rotate in the horizontal direction. Specifically, for example, the correspondence between the tilt amount (θ) of the antenna 30 and the voltages applied to the piezoelectric elements 61-1 and 61-2, and the rotation amount (δ) of the antenna 30 and the piezoelectric element 61-3. , 61-4, the correspondence relationship with the applied voltages is defined in advance. Then, the CPU 110 controls the voltage applied by the applying means 63-3 and 63-4 while tilting the core axis direction of the antenna 30 by controlling the applied voltage by the applying means 63-1 and 63-2 according to the above-described correspondence. Then, the antenna 30 is rotated in the horizontal direction.

  Then, when the reception level input from the reception level detection circuit 138 is equal to or higher than the reception regulation level 220, the CPU 110 performs processing for demodulating the standard radio wave and extracting time information.

[Process flow]
Next, the flow of the third time correction process will be described. FIG. 13 is a flowchart for explaining the flow of the third time correction process. Note that the processing described here is realized by the CPU 110 reading and executing the third time correction program 212.

  In the third time adjustment process, the CPU 110 first refers to the reception time storage area 181 to determine whether it is a reception time. When the current time becomes the reception time set in advance in the reception time storage area 181 (step c10: YES), CPU 110 controls antenna attitude adjustment mechanism 120b and tilts the core axis direction of antenna 30 by θmax. Control is started (step c20). If the antenna 30 is tilted to the uppermost tilted state (step c30: YES), the CPU 110 starts control for rotating the antenna 30 in the horizontal direction by δmax (step c40). Then, if the antenna 30 is rotated to the leftmost rotation state (step c50: YES), the CPU 110 selects a standard radio wave transmission station according to the user operation (step c60), and receives based on the selected transmission station. The control circuit unit 130 is controlled to start receiving standard radio waves (step c70).

  Subsequently, the CPU 110 determines the reception level input from the reception level detection circuit 138 (step c80). If the reception level is equal to or higher than the reception specified level 220 (step c90: YES), the CPU 110 reads the time code conversion program 213 and reads the time. The code conversion process is executed, and the process for extracting the time information by demodulating the received standard radio wave is started (step c100).

  Then, CPU 110 determines whether or not the reception of the standard radio wave is successful based on the result of the time information extraction process. If the reception is successful (step c110: YES), the reception of the standard radio wave is stopped (step c120). Then, CPU 110 corrects the current time according to the extracted time information (step c130), and ends the third time correction process.

  On the other hand, when the reception level input from the reception level detection circuit 138 is less than the prescribed reception level 220 (step c90: NO), or when reception of the standard radio wave has failed (step c110: NO), the CPU 110 receives the antenna. It is determined whether 30 is in the lowest inclination state. If it is not the lowest tilted state (step c150: NO), the CPU 110 controls the antenna attitude adjustment mechanism 120b to control the core axis direction of the antenna 30 to tilt by a predetermined angle in the direction of the lowest tilted state. (Step c160), the process returns to step c80 to execute the above-described processing.

  Further, when the core axis direction of the antenna 30 has already been tilted by −θmax and is in the lowest tilt state (step c150: YES), the CPU 110 stops receiving the standard radio wave (step c170), and FIG. Control goes to step c180.

  That is, as shown in FIG. 14, the CPU 110 controls the antenna attitude adjustment mechanism 120b and starts control for tilting the core axis direction of the antenna 30 by θmax (step c180). Then, if the antenna 30 is tilted to the uppermost tilted state (step c190), the CPU 110 subsequently determines whether or not the antenna 30 is in the rightmost rotation state. If it is not the rightmost rotation state (step c200: NO), the CPU 110 controls the antenna attitude adjustment mechanism 120b and performs control for rotating the antenna 30 by a predetermined angle in the direction of the rightmost rotation state ( Step c210), returning to step c70 in FIG. 13, the above-described processing is executed.

  Further, when the antenna 30 has already been rotated by -δmax in the horizontal direction and is in the rightmost rotation state (step c200: YES), the CPU 110 changes the reception time to a time one hour after the current time. The reception time storage area 181 is updated (step c220), and the process returns to step c10 to enter a standby state until the reception time.

  As described above, according to the second embodiment, the antenna 30 can be tilted and rotated in the horizontal direction. Then, the reception level of the standard radio wave received by the antenna 30 is detected, and when the reception level is equal to or higher than the predetermined reception regulation level 220, the received standard radio wave is demodulated to extract time information, and the extracted time information The current time can be corrected according to Therefore, the antenna 30 can be tilted and rotated in the horizontal direction to adjust its posture, and an optimum posture with good reception sensitivity can be detected, so that the reception sensitivity of standard radio waves can be further improved. it can.

  In the second embodiment described above, the attitude of the antenna 30 at which the reception level is equal to or higher than the reception regulation level 220 is detected while the antenna 30 is tilted and rotated every predetermined angle, and the time is corrected. However, it may be as follows.

  That is, as a pre-processing for time correction, the antenna 30 is tilted at every predetermined angle and rotated at every predetermined angle to detect the reception level of the standard radio wave, generate sampling data, and store it in the RAM 180. Keep it. FIG. 15 is a diagram illustrating a data configuration example of sampling data in the present modification. This sampling data is a data table in which the reception level is associated with the tilt amount (θ) and the rotation amount (δ), and the CPU 110 converts the reception level input from the reception level detection circuit 138 to the current antenna 30. Are stored in the RAM 180 as sampling data in correspondence with the inclination amount (θ) and the rotation amount (δ).

  Then, with reference to the generated sampling data, the standard radio wave received in a state where the antenna 30 is tilted and rotated based on the tilt amount (θ) and the pivot amount (δ) of the antenna 30 having the highest reception level is obtained. The current time may be corrected by demodulating and extracting time information.

  In this case, the CPU 110 executes a fourth time process described below instead of the third time correction process. FIG. 16 is a flowchart for explaining the flow of the fourth time correction process.

  In the fourth time correction process, the CPU 110 refers to the reception time storage area 181 to determine whether it is a reception time. When the current time becomes the reception time set in advance in the reception time storage area 181 (step d10: YES), the CPU 110 controls the antenna attitude adjustment mechanism 120b to change the core axis direction of the antenna 30. Control for inclining θmax is started (step d20). If the antenna 30 is tilted to the uppermost tilted state (step d30: YES), the CPU 110 starts control for rotating the antenna 30 by δmax in the horizontal direction (step d40). If the antenna 30 is rotated to the leftmost rotation state (step d50: YES), the CPU 110 selects a standard radio wave transmission station according to the user operation (step d60), and receives it based on the selected transmission station. The control circuit unit 130 is controlled to start receiving standard radio waves (step d70).

  Next, the CPU 110 stores the reception level input from the reception level detection circuit 138 in the RAM 180 as the above-described sampling data in association with the current tilt amount (θ) and rotation amount (δ) of the antenna 30. (Step d80).

  Subsequently, the CPU 110 determines whether or not the antenna 30 is in the lowest tilt state. If it is not the lowest tilted state (step d90: NO), the CPU 110 controls the antenna attitude adjusting mechanism 120b to control the core axis direction of the antenna 30 to tilt by a predetermined angle in the direction of the lowest tilted state. (Step d100), the process returns to step d80 to execute the above-described processing.

  On the other hand, when the core axis direction of the antenna 30 has already been tilted by −θmax and is in the lowest tilted state (step d90: YES), the CPU 110 stops receiving the standard radio wave (step d110), and FIG. The process proceeds to step d120.

  That is, as shown in FIG. 17, the CPU 110 controls the antenna posture adjustment mechanism 120b and starts control for tilting the core axis direction of the antenna 30 by θmax (step d120). If the antenna 30 is tilted to the uppermost tilted state (step d130: YES), the CPU 110 determines whether the antenna 30 is in the rightmost turning state. If it is not the rightmost rotation state (step d140: NO), the CPU 110 controls the antenna attitude adjustment mechanism 120b and performs control for rotating the antenna 30 by a predetermined angle in the direction of the rightmost rotation state ( Step d150), the process returns to step d70 in FIG.

  In addition, when the antenna 30 has already been rotated by -δmax in the horizontal direction and is in the rightmost rotation state (step d140: YES), the CPU 110 responds to the highest reception level based on the generated sampling data. The amount of tilt (θ) and the amount of rotation (δ) to be extracted are extracted (step d160). Then, the CPU 110 controls the antenna attitude adjustment mechanism 120b and performs control for tilting the core axis direction of the antenna 30 according to the extracted tilt amount (θ) (step d170), and the antenna according to the extracted rotation amount (δ). Control for rotating 30 in the horizontal direction is performed (step d180).

  Subsequently, the CPU 110 reads the time code conversion program 213 and executes time code conversion processing, and starts processing for demodulating the received standard radio wave and extracting time information (step d190). Then, CPU 110 determines whether or not the reception of the standard radio wave is successful based on the result of the time information extraction process. If the reception is successful (step d200: YES), the reception of the standard radio wave is stopped (step d210). Then, CPU 110 corrects the current time according to the extracted time information (step d220), and ends the fourth time correction process.

  On the other hand, when CPU 110 determines that reception has failed (step d200: NO), it stops receiving standard radio waves (step d240). Then, the CPU 110 changes the reception time to a time one hour after the current time, updates the reception time storage area 181 (step d250), returns to step d10, and enters a standby state until the reception time.

  According to this modification, as preprocessing for time correction, the attitude of the antenna 30 is adjusted by tilting and rotating, and the standard radio wave received by the tilted and rotated antenna 30 is adjusted. The reception level can be detected and sampling data can be generated. Then, with reference to the generated sampling data, the standard radio wave received in a state where the antenna 30 is tilted and rotated according to the tilt amount (θ) and the rotation amount (δ) of the antenna 30 having the highest reception level is demodulated. The time information can be extracted to correct the current time. Therefore, the optimum tilt amount (θ) and rotation amount (δ) of the antenna 30 with good reception sensitivity are detected in advance, and the core axis direction of the antenna 30 is tilted according to the detected tilt amount (θ), and according to the rotation amount (δ). Since the time signal can be extracted by demodulating the standard radio wave after the antenna 30 is rotated in the horizontal direction, the reception performance of the standard radio wave can be further improved.

[Modification]
The preferred embodiments of the present invention have been described above, but the present invention is not limited to those described above, and can be changed as appropriate without departing from the spirit of the invention.

  For example, by forming both ends of the antenna 70 so as to be elastically deformable, it is possible to adjust the posture even in a narrow space.

  18 and 19 are diagrams for explaining the tilting operation of the antenna in this case. FIG. 18 is a schematic cross-sectional view of the radio-controlled timepiece main body, in which (a) shows the normal state of the antenna 70, (b) shows the lowest tilted state, and (c) shows the highest tilted state.

  As shown in FIG. 18, the antenna 70 includes a rod-like core 71 made of a magnetic material and formed by laminating flexible thin plates, and a winding 73 made of copper or the like wound around the core 71. And both ends of the core 71 are widened by spacers 75 on both sides in the thickness direction. According to this configuration, since both ends of the core 71 are opened, the reception sensitivity is improved. Then, both end portions of the opened core 71 are formed so as to be elastically deformable.

  When the antenna 70 is tilted and the core axis direction is tilted in the direction of the lowest tilted state, the upper left end P3 of the core 71 in FIG. The dial 21 is bent in contact with the dial 21, and the lower right end P <b> 2 is bent in contact with the lower surface of the timepiece module below the antenna 70.

  On the other hand, when the antenna 70 is tilted and the core axis direction is tilted in the direction of the uppermost tilted state, as shown in FIG. 18C, the upper right end P1 of FIG. The dial 21 is bent in contact with the dial 21, and the lower left end P4 is bent in contact with the lower surface of the timepiece module below the antenna 70.

  FIG. 19 is a schematic cross-sectional view of the radio-controlled timepiece main body. FIG. 19A is a diagram illustrating a normal state of the antenna 70, and FIG. Similarly, when the radio-controlled timepiece main body is not placed horizontally, when the antenna 70 is tilted, for example, when the core axis direction is tilted in the direction of the uppermost tilted state, as shown in FIG. 19B, the upper right end P1 of the core 71 is bent by contacting the dial 21, and the lower left end P4 is bent by contacting the lower surface of the timepiece module below the antenna 70.

  Further, in the above-described embodiment, the case where the antenna is tilted or rotated by an actuator using a piezoelectric element has been described. However, in an MEMS (Micro Electro Mechanical Systems) type actuator or an actuator using a shape memory alloy, You may use.

(A) is a schematic longitudinal cross-sectional view of the radio timepiece main body in embodiment of this invention, (b) is a schematic cross-sectional view of the radio timepiece main body in embodiment of this invention. It is a figure for demonstrating the structure of the antenna attitude | position adjustment mechanism in 1st Embodiment of this invention, (a) is the principal part cross-sectional view of the watch case which notched the dial and showed the internal structure of the periphery of an antenna (B) is a principal part longitudinal cross-sectional view of the timepiece case which showed the internal structure of the periphery of an antenna. It is a figure for demonstrating the inclination operation | movement of the antenna in 1st Embodiment of this invention, (a) is an antenna of a normal state, (b) is an antenna of the highest inclination state, (c) is a lowermost inclination state. The figure which shows an antenna. The block diagram which shows an example of a function structure of the radio timepiece in 1st Embodiment of this invention. The block diagram which shows an example of a structure of the reception control circuit part in 1st Embodiment of this invention. The flowchart for demonstrating the flow of the 1st time correction process in 1st Embodiment of this invention. The figure which shows the data structural example of the sampling data in the modification of 1st Embodiment of this invention. The flowchart for demonstrating the flow of the 2nd time correction process in the modification of 1st Embodiment of this invention. It is a figure for demonstrating the structure of the antenna attitude | position adjustment mechanism in 2nd Embodiment of this invention, (a) is the principal part cross-sectional view of the watch case which notched the dial and showed the internal structure of the periphery of an antenna (B) is a principal part longitudinal cross-sectional view of the timepiece case which showed the internal structure of the periphery of an antenna. It is a figure for demonstrating the inclination operation | movement of the antenna in 2nd Embodiment of this invention, (a) is an antenna of a normal state, (b) is an antenna of the highest inclination state, (c) is a lowermost inclination state. The figure which shows an antenna. It is a figure for demonstrating the rotation operation | movement of the antenna in 2nd Embodiment of this invention, (a) is an antenna of a normal state, (b) is an antenna of a leftmost rotation state, (c) is a rightmost rotation. The figure which shows the antenna of a moving state. The block diagram which shows an example of a function structure of the radio timepiece in 2nd Embodiment of this invention. The flowchart for demonstrating the flow of the 3rd time correction process in 2nd Embodiment of this invention. The flowchart for demonstrating the flow of the 3rd time correction process in 2nd Embodiment of this invention. The figure which shows the data structural example of the sampling data in the modification of 2nd Embodiment of this invention. The flowchart for demonstrating the flow of the 4th time correction process in the modification of 2nd Embodiment of this invention. The flowchart for demonstrating the flow of the 4th time correction process in the modification of 2nd Embodiment of this invention. It is a figure for demonstrating the inclination operation | movement of the antenna in the modification of this invention, (a) is an antenna of a normal state, (b) is an antenna of a lowest inclination state, (c) is an antenna of an uppermost inclination state. FIG. It is a figure for demonstrating the inclination operation | movement of the antenna in the modification of this invention, (a) is an antenna of a normal state, (b) is a figure which shows an antenna of the highest inclination state.

Explanation of symbols

100a Radio clock 30 Antenna 31 Core 33 Winding 110 CPU
120a Antenna attitude adjustment mechanism 130 Reception control circuit unit 140 Oscillation circuit unit 150 Timekeeping circuit unit 160 Input unit 170 Display unit 180 RAM
181 Reception time storage area 200a ROM
210a Control program 211 First time correction program 213 Time code conversion program 220 Reception specified level

Claims (7)

A rod-shaped core made of magnetic material;
Windings wound around this core,
With
The antenna is characterized in that the core is inclined and the core axial direction is inclined.   The antenna according to claim 1, wherein the antenna further rotates in a horizontal direction around the center of the core. Receiving means for receiving radio waves including time information by an antenna having a rod-shaped core and a winding wound around the core;
Reception intensity detection means for detecting the reception intensity of the radio wave received by the reception means;
Antenna moving means for tilting the antenna;
Storage means for storing a predetermined received intensity value;
A comparison means for comparing the reception intensity detected by the reception intensity detection means with the reception intensity value stored in the storage means;
With
Extracting time information from the radio wave received by the reception means when the reception intensity detected by the reception intensity detection means is greater than the reception intensity value stored in the storage means as a result of the comparison by the comparison means. An antenna device characterized by the above.   The antenna apparatus according to claim 3, further comprising a horizontal moving unit that rotates the antenna in a horizontal direction with the central portion of the core as a rotation center. Receiving means for receiving radio waves including time information by an antenna including a rod-shaped core and a winding wound around the core;
Reception intensity detection means for detecting the reception intensity of the radio wave received by the reception means;
Antenna moving means for tilting the antenna;
Storage means for storing the reception intensity detected by the reception intensity detection means in association with the inclination amount of the antenna tilted by the antenna moving means;
Extraction means for extracting the amount of inclination of the antenna corresponding to the largest reception strength among the reception strengths stored by the storage means;
With
An antenna apparatus characterized in that time information is extracted from radio waves received by the receiving means in a state where the antenna is tilted based on an inclination amount of the antenna extracted by the extracting means. Horizontally movable means for rotating the antenna in the horizontal direction with the central portion of the core as the rotation center,
The storage means stores the reception intensity detected by the reception intensity detection means in further correspondence with the amount of rotation of the antenna rotated in the horizontal direction by the horizontal movable means,
The extraction means extracts the amount of inclination of the antenna and the amount of rotation of the antenna in the horizontal direction corresponding to the largest reception intensity among the reception intensities stored by the storage means,
The antenna is tilted based on the amount of tilt of the antenna extracted by the extracting means, and is received by the receiving means in a state where the antenna is rotated based on the amount of rotation of the antenna in the horizontal direction. 6. The antenna device according to claim 5, wherein time information is extracted from the received radio wave.   The antenna device according to claim 3, wherein the core constituting the antenna is formed by laminating thin plates made of amorphous.

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