JP2004117167A - Electronic equipment and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable to find an orientation without the need for a user to move by using a receiving antenna and a shield member. <P>SOLUTION: Electronic equipment 100 comprises the receiving antenna 31 for receiving electric waves from a GPS satellite, the shield member 18c having a non-shield portion 18d in part and provided rotatable around the receiving antenna 31, an orbit information storing means 52 storing orbit information for a plurality of the GPS satellites, a specifying and storing means 52 for specifying the GPS satellite having good wave receiving sensitivity via the receiving antenna 31 when rotating the shield member 18c and for storing the position of the non-shield portion 18d at this time, a reading means 51 for reading the orbit information for the specified GPS satellite out of the orbit information storing means 52, an orientation calculating means 51 for calculating an orientation at a current position in accordance with the position of the non-shield portion 18d and the read orbit information for the GPS satellite, and orientation output means 40, 51 for outputting the orientation calculated by the orientation calculating means 51. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electronic device and a program capable of measuring an azimuth.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a method of obtaining an azimuth, for example, a method of obtaining the azimuth using a magnetic azimuth sensor is known as a well-known technique.
Also, recently, a technique is known that obtains an azimuth from a position difference and a time difference between two points to which a user has moved by using a GPS (Global Positioning System) (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP 2001-356161 A
[0004]
[Problems to be solved by the invention]
However, since the magnetic azimuth sensor generates magnetism, it is difficult to arrange other components around the magnetic azimuth sensor. Furthermore, since the magnetic direction sensor generates noise, noise countermeasures were required.
On the other hand, when the azimuth is obtained by using the GPS, there is no problem as in the magnetic azimuth sensor. However, when the azimuth is obtained by using the GPS, the user must move, and further, there is a problem that the measurement accuracy is not improved unless the user moves linearly and the moving speed is high. .
[0005]
Therefore, an object of the present invention is to provide an electronic device and a program that can obtain an azimuth without using a GPS by using a GPS.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 includes a receiving antenna (for example, the patch antenna 31 in FIGS. 1 and 2) that receives a radio wave from a GPS satellite, and an upper part of the receiving antenna. A shield member that shields the arrival of radio waves to the receiving antenna and has a non-shielding portion 18d formed in a part thereof and is rotatably provided with respect to the receiving antenna (for example, the second hand and shield in FIGS. 1 and 2). Plate 18c), orbital information storage means (for example, RAM 52 in FIGS. 4 and 5) for storing orbital information indicating the positions of a plurality of GPS satellites in the sky for each GPS satellite, and rotating the shielding member. In this case, a specific storage for identifying a GPS satellite having good radio wave reception sensitivity by the receiving antenna from the plurality of GPS satellites and storing a position of the non-shielding portion at that time. Steps (for example, CPU 51 and RAM 52 in FIGS. 4 and 5 and steps S11 to S13 in FIG. 8) and reading means (for example, reading out the orbit information of the GPS satellite specified by the specific storage means from the orbit information storage means) The azimuth at the current position based on the CPU 51 in FIG. 4, the step S14 in FIG. 8, the position of the unshielded portion stored by the specific storage unit, and the orbit information of the GPS satellite read by the reading unit. (Eg, CPU 51 in FIG. 4, steps S17 to S18 in FIG. 8), and azimuth output means (eg, FIGS. 1, 2 and 4) for outputting the azimuth calculated by the azimuth calculating means. CPU 51, light emitting element 40, and step S19 in FIG. 8).
[0007]
According to the first aspect of the present invention, when the shielding member is rotated, the position of the non-shielding part stored by the specific storage means and the orbit of the GPS satellite read by the reading means are calculated by the azimuth calculating means. Since the azimuth at the current position is calculated based on the information and output by the azimuth output means, the user can obtain the azimuth only by rotating the shielding member. Therefore, the user can calculate the bearing without moving. Further, since there is no need to use a magnetic direction sensor, there is no need to take noise countermeasures, and it can be mounted on a small electronic device such as a wristwatch.
[0008]
According to a second aspect of the present invention, there is provided a receiving antenna (for example, the patch antenna 31 in FIGS. 9 and 10) for receiving a radio wave from a GPS satellite, and a part of the upper surface of the receiving antenna. A shield member (for example, a second hand and shield plate 28c in FIGS. 9 and 10) rotatably provided with respect to the receiving antenna while blocking arrival of radio waves, and represents positions of a plurality of GPS satellites on the sky. Orbit information storage means (for example, RAM 67 in FIG. 12) for storing orbit information for each GPS satellite, and a GPS satellite having poor reception sensitivity of radio waves by the receiving antenna when the shielding member is rotated. A specific storage unit (for example, the CPU 66 in FIG. 12, the RAM 67, and the RAM in FIG. Steps S21 to S23), reading means (for example, the CPU 66 in FIG. 12, step S24 in FIG. 14) for reading out the orbit information of the GPS satellite specified by the specific storage means from the orbit information storage means, and the specific storage means Azimuth calculating means for calculating the azimuth at the current position based on the position of the shielding member stored by the above and the orbit information of the GPS satellite read by the reading means (for example, CPU 66 in FIG. 12, step in FIG. 14) S27 to S28), and azimuth output means for outputting the azimuth calculated by the azimuth calculation means (for example, the CPU 66 in FIGS. 9, 10, and 12; the light emitting element 41; and step S29 in FIG. 14). It is characterized by.
[0009]
According to the second aspect of the present invention, when the shielding member is rotated, the position of the shielding member stored by the specific storage unit and the orbit information of the GPS satellite read by the reading unit are calculated by the azimuth calculation unit. Then, the azimuth at the current position is calculated and output by the azimuth output means, so that the user can obtain the azimuth only by rotating the shielding member. Therefore, the user can calculate the bearing without moving. Further, since there is no need to use a magnetic direction sensor, there is no need to take noise countermeasures, and it can be mounted on a small electronic device such as a wristwatch.
[0010]
A third aspect of the present invention provides a receiving antenna (for example, a second hand / antenna 38c in FIGS. 15 and 16) for receiving a radio wave from a GPS satellite while rotating, and an orbit representing the positions of a plurality of GPS satellites on the sky. Orbital information storage means (for example, RAM 82 in FIG. 18) for storing information for each GPS satellite, and a GPS satellite having good reception sensitivity of radio waves by the receiving antenna when the receiving antenna is rotated. Specific storage means (for example, CPU 81 and RAM 82 in FIG. 18, steps S 31 to S 33 in FIG. 20) for specifying the position of the reception antenna at that time from among a plurality of GPS satellites, and specifying the specific storage means Reading means (for example, FIG. 1) for reading out the obtained orbit information of the GPS satellite from the orbit information storage means (for example, RAM 82). CPU 81, step S34 in FIG. 20, the position of the receiving antenna stored in the specific storage means, and the orbital information of the GPS satellite read by the reading means to calculate the azimuth at the current position. The azimuth calculating means (for example, the CPU 81 in FIG. 18; steps S37 to S38 in FIG. 20); and the azimuth output means for outputting the azimuth calculated by the azimuth calculating means (for example, the CPU 81 in FIGS. 15, 16, and 18) A light emitting element 42, step S39 in FIG. 20).
[0011]
According to the third aspect of the present invention, when the receiving antenna is rotated, the position of the receiving antenna stored in the specific storage unit by the azimuth calculating unit and the orbit information of the GPS satellite read by the reading unit And the azimuth at the current position is calculated and output by the azimuth output means, so that the user can obtain the azimuth only by rotating the receiving antenna. Therefore, the user can calculate the bearing without moving. Further, since there is no need to use a magnetic direction sensor, there is no need to take noise countermeasures, and it can be mounted on a small electronic device such as a wristwatch.
[0012]
The invention described in claim 4 is characterized in that the shielding member is configured to make one rotation in 60 seconds.
[0013]
According to the fourth aspect of the invention, since the shielding member is configured to make one rotation in 60 seconds, it can be used as a second hand of a timepiece.
[0014]
The invention according to claim 5 is characterized in that the receiving antenna is configured to make one rotation in 60 seconds.
[0015]
According to the fifth aspect of the invention, since the receiving antenna is configured to make one rotation in 60 seconds, it can be used as a second hand of a timepiece.
[0016]
According to a sixth aspect of the present invention, there is provided a destination position storage means (for example, the RAM 52 of FIGS. 4 and 5 and step S1 of FIG. 7) for storing the latitude and longitude of the destination, and the receiving antenna (for example, FIG. 1). A latitude / longitude calculation means (for example, CPU 51 in FIG. 4, step S2 in FIG. 7) for calculating the latitude and longitude at the current position based on the radio waves received by the patch antenna 31 and the second hand / antenna 38c in FIG. Destination local position calculating means for calculating the direction of the destination based on the latitude and longitude of the destination stored in the destination position storing means and the latitude and longitude of the current position calculated by the latitude and longitude calculating means (Eg, CPU 51 in FIG. 4, step S5 in FIG. 7) and destination location output means (eg, FIGS. 1 and 2) for outputting the direction of the destination calculated by the destination location calculation means. Emitting element 40, CPU 51 of FIG. 4, characterized in that it comprises a step S6) in FIG.
[0017]
According to the invention as set forth in claim 6, the destination local position calculating means, the latitude and longitude of the destination stored in the destination position storage means, the latitude and longitude of the current position calculated by the latitude and longitude calculating means, , The destination locality output means outputs the calculated direction of the destination, so that the user can obtain the direction of the destination only by storing the latitude and longitude of the destination. Can be. Therefore, the user can calculate the direction of the destination without moving.
[0018]
The invention according to claim 7 is characterized in that the non-shielding portion is formed by cutting off a part of the shielding member.
[0019]
According to the seventh aspect of the present invention, since the non-shielding portion is formed by cutting off a part of the shielding member, the non-shielding portion can be easily formed.
[0020]
According to an eighth aspect of the present invention, the azimuth output means (for example, the light emitting element 40 in FIGS. 1, 2, and 4, the CPU 51, and step S6 in FIG. 7) are arranged at predetermined intervals in the circumferential direction. 1 (for example, the light emitting element 40 in FIGS. 1 and 2) and a light emitting unit (for example, FIG. 4) at a position corresponding to the azimuth calculated by the azimuth calculating means (for example, the CPU 51 in FIG. 4 and step S5 in FIG. 7). 1, and a light emission control unit (for example, CPU 51 in FIG. 4, step S19 in FIG. 8) for causing the light emitting element 40 in FIG. 2 to emit light.
[0021]
According to the invention described in claim 8, the light emission control unit causes the light emitting unit at the position corresponding to the azimuth calculated by the azimuth calculation unit to emit light, so that the user can easily confirm visually and perform the navigation operation. Can be easier.
[0022]
According to a ninth aspect of the present invention, there is provided a receiving antenna (for example, the patch antenna 31 in FIGS. 1 and 2) for receiving a radio wave from a GPS satellite, and a radio wave transmitted to the receiving antenna by covering an upper portion of the receiving antenna. A shield member (for example, a second hand and shield plate 18c in FIGS. 1 and 2), which shields the arrival and is provided with a non-shield portion 18d partially and rotatably provided with respect to the receiving antenna, Orbit information storage means (for example, RAM 52 in FIGS. 4 and 5) for storing orbit information indicating the position of the GPS satellite in the sky for each GPS satellite, and predetermined output means (for example, FIGS. 1 and 2) , The CPU 51 of FIG. 4, the light emitting element 40), a computer of an electronic device (for example, the wristwatch 100 of FIG. 1) rotates the shielding member (for example, the second hand and shielding plate 18c of FIGS. 1 and 2). If A function of specifying a GPS satellite having good reception sensitivity of radio waves by the receiving antenna from among the plurality of GPS satellites and storing a position of the non-shielding portion 18d at that time (for example, steps S11 to S13 in FIG. 8). And a function (for example, step S14 in FIG. 8) for reading out the orbit information of the specified GPS satellite from the orbit information storage means (for example, the RAM 52 in FIGS. 4 and 5). A function of calculating the azimuth at the current position based on the position of the unit and the readout orbit information of the GPS satellite (for example, the azimuth calculation program 53a in FIG. 4, the target local position calculation program 53b in FIG. Steps S17 to S18), and output the calculated azimuth by the output means (for example, the CPU 51 of FIGS. 1, 2, and 4 and the light emitting element 40). Function of (e.g., step S19 in FIG. 8), characterized in that to realize a.
[0023]
According to the ninth aspect of the present invention, when the shielding member is rotated by executing the program, the position of the non-shielding part stored in the specific storage unit by the azimuth calculating unit and the reading unit The azimuth at the current position is calculated based on the orbit information of the GPS satellites read out by the user and output by the azimuth output means, so that the user can obtain the azimuth only by rotating the shielding member. Therefore, the user can calculate the bearing without moving. Further, since there is no need to use a magnetic direction sensor, there is no need to take noise countermeasures, and it can be mounted on a small electronic device such as a wristwatch.
[0024]
According to a tenth aspect of the present invention, there is provided a receiving antenna (for example, the patch antenna 31 in FIGS. 9 and 10) for receiving a radio wave from a GPS satellite, and a part of the upper surface of the receiving antenna. A shield member (for example, a second hand and shield plate 28c in FIGS. 9 and 10) rotatably provided with respect to the receiving antenna while blocking arrival of radio waves, and represents positions of a plurality of GPS satellites on the sky. An electronic device (e.g., FIG. 1) including orbit information storage means (e.g., RAM 67 in FIG. 12) for storing orbit information for each GPS, and predetermined output means (e.g., CPU 66 and light emitting element 41 in FIG. 12) 9), when the shielding member is rotated, the GPS satellites having poor radio wave reception sensitivity by the receiving antenna are selected from the plurality of GPS satellites. And a function of storing the position of the shielding member at that time (for example, steps S21 to S23 in FIG. 14) and a function of reading out the orbit information of the specified GPS satellite from the orbit information storage means (for example, A function of calculating the azimuth at the current position based on the stored position of the shielding member and the readout orbit information of the GPS satellite (step S24 in FIG. 14) (for example, the azimuth calculation program 68a in FIG. 12). 12, a destination locality calculation program 68b in FIG. 12, steps S27 to S28 in FIG. 14, and a function of outputting the calculated orientation by the output means (for example, step S29 in FIG. 14). And
[0025]
According to the tenth aspect of the present invention, when the shield member is rotated by executing the program, the position of the shield member stored in the specific storage unit by the azimuth calculation unit and the reading unit The azimuth at the current position is calculated based on the read GPS satellite orbit information and is output by the azimuth output means, so that the user can obtain the azimuth only by rotating the shielding member. Therefore, the user can calculate the bearing without moving. Further, since there is no need to use a magnetic direction sensor, there is no need to take noise countermeasures, and it can be mounted on a small electronic device such as a wristwatch.
[0026]
According to an eleventh aspect of the present invention, there is provided a receiving antenna (for example, the second hand shown in FIGS. 15 and 16) for receiving a radio wave from a GPS satellite while rotating as shown in FIGS. Antenna 38c), orbit information storage means (for example, RAM 82 in FIG. 18) for storing orbit information indicating the positions of a plurality of GPS satellites in the sky for each GPS satellite, and predetermined output means (for example, RAM 82). When the receiving antenna is rotated by a computer of an electronic device (for example, the wristwatch 300 of FIG. 15) including the CPU 81 and the light emitting element 42 of FIGS. 15 and 16, the reception sensitivity of the radio wave by the receiving antenna is good. A function of specifying a suitable GPS satellite from the plurality of GPS satellites and storing the position of the receiving antenna at that time (for example, step S31 in FIG. 20). S33), a function of reading the orbit information of the specified GPS satellite from the orbit information storage means (for example, step S34 in FIG. 20), the stored position of the receiving antenna, and the read GPS A function for calculating the azimuth at the current position based on the orbit information of the satellite (for example, the azimuth calculation program 83a in FIG. 18, the destination local position calculation program 83a in FIG. 18, and steps S37 to S38 in FIG. 20), A function (for example, step S39 in FIG. 20) of outputting the azimuth by the output means (for example, the CPU 81 and the light emitting element 42 in FIGS. 15 and 16) is realized.
[0027]
According to the eleventh aspect, when the receiving antenna is rotated, the position of the receiving antenna stored by the specific storage unit and the orbit information of the GPS satellite read by the reading unit are calculated by the azimuth calculating unit. And the azimuth at the current position is calculated and output by the azimuth output means, so that the user can obtain the azimuth only by rotating the receiving antenna. Therefore, the user can calculate the bearing without moving. Further, since there is no need to use a magnetic direction sensor, there is no need to take noise countermeasures, and it can be mounted on a small electronic device such as a wristwatch.
[0028]
BEST MODE FOR CARRYING OUT THE INVENTION
[First embodiment]
Hereinafter, an electronic device and a program according to the present invention will be described in detail. In the present embodiment, a wristwatch will be described as an example of the electronic device.
As shown in FIGS. 1 and 2, the wristwatch 100 is provided with a watch case 2 as a device case for accommodating the watch module 1 therein. In the upper center of the watch case 2, a watch glass 3 is provided via a packing 4. Is attached. The frame-shaped member 5 provided in the timepiece module 1 is arranged such that the upper part thereof is slightly spaced from the timepiece glass 3. A back cover 6 is attached to the lower surface of the watch case 2 via a waterproof ring 7, and a buffer member 8 is provided between the watch module 1 and the back cover 6. A bezel 9 is provided on the upper outer periphery of the watch case 2.
[0029]
The watch module 1 has an analog function. As shown in FIG. 2, the watch module 1 includes a dial 12, a patch antenna 31 as a receiving antenna, an upper housing 10, a circuit board 13, and a lower housing 11. The watch case 2 is attached to the middle frame 14. The dial 12 is disposed on the upper surface of the upper housing 10, and the frame member 5, the hour character 30, and the patch antenna 31 are disposed on the upper surface of the dial 12. Further, a circuit board 13 is disposed below the frame-shaped member 5 and between the upper housing 10 and the lower housing 11. Further, between the frame member 5 and the middle frame 14, a light emitting element 40 as a light emitting portion of the direction output means is arranged outside the hour character 30 along the circumferential direction corresponding to the hour character 30.
[0030]
The patch antenna 31 is a known antenna that receives almanac data and ephemeris data transmitted from GPS satellites. The patch antenna 31 is formed in a disk shape, and is provided on the dial 12 with its receiving surface facing upward. Here, almanac data transmitted from a GPS satellite is orbital information about all GPS satellites existing in the orbit of the GPS satellite, and ephemeris data is used to obtain accurate position information and a signal of each GPS satellite. This is the time information sent.
[0031]
The upper housing 10 is provided with an analog pointer mechanism 15, and the lower housing 11 incorporates, for example, a battery (not shown) for operating the analog pointer mechanism 15 and the like.
[0032]
The analog pointer mechanism 15 includes a pointer shaft 17 extending upward from a shaft hole 12a provided in the dial 12, an hour hand 18a, a minute hand 18b attached to the pointer shaft 17, a second hand / shield plate 18c as a shielding member, and the like. And the hands 18 are configured to move above the dial 12 and the patch antenna 31. Here, hour characters 30 are provided at predetermined locations on the upper surface of the dial 12.
[0033]
The second hand / shield plate 18c is formed in a disc shape, for example, from a material that shields radio waves from GPS satellites, and as shown in FIG. A portion 18d is formed. The outer diameter of the second hand / shielding plate 18 c is formed to be larger than the outer diameter of the patch antenna 31. The second hand / shielding plate 18c is attached to the pointer shaft 17 so as to make one rotation in 60 seconds, and also serves as a second hand.
As shown in FIG. 3B, the second hand / shielding plate 18c has directivity such that only the area around the non-shielding portion 18d can receive radio waves from GPS satellites.
[0034]
The frame member 5 is made of, for example, a light-transmitting synthetic resin, particularly a transparent synthetic resin. As shown in FIG. 2, the frame-shaped member 5 is mounted on the inner peripheral surface of the watch case 2 in a state of contacting the upper surface of the peripheral portion of the dial 12. The frame member 5 is a member that also has a function as a protection member or a cushioning member.
[0035]
The light emitting element 40 emits light to notify the user of the calculated orientation, and is configured by, for example, a two-color light emitting LED element. The light emitting element 40 is controlled to emit light such that, for example, a first color is used to indicate one reference direction and another second color is used to indicate the direction of a destination to which the user should go. Is made.
[0036]
Next, a structure for realizing the function of the navigation program of the wristwatch 100 will be described.
In the navigation function, when the user inputs a destination to the wristwatch 100, the wristwatch 100 notifies the moving direction in which the user should travel by voice or the light emitting element 40. The navigation function is operated by a computer provided inside the wristwatch 100.
[0037]
Specifically, as shown in FIG. 4, the wristwatch 100 transmits a CPU 51, a RAM 52, a ROM 53, an input unit 54 for inputting the latitude and longitude of a destination by voice, a display unit 55 for displaying time, and a clock signal. Oscillator circuit section 56, clock circuit section 57 for receiving and measuring a clock signal to measure and manage time, receiving section 58 for receiving position information from a GPS satellite received by patch antenna 31, and converting position information received by receiving section 58 A signal processing unit 59 for processing, a voice control unit 61 for notifying the user of the direction of the destination to be directed to the user via a speaker 62 for notifying the user of the target direction, and the like, an oscillation circuit unit 56, a receiving unit 58, a patch Each part except the antenna 31 is connected by a bus 64.
[0038]
The CPU 51 reads various programs stored in the ROM 53 and develops them in the RAM 52 at a predetermined timing or in response to a voice input from the input unit 54, and based on the programs, issues instructions and data to each functional unit based on the programs. Perform transfer, etc. In particular, the CPU 51 controls the reception unit 58 at predetermined time intervals to execute a reception process of the standard radio wave, and the current time data counted by the clock circuit unit 57 based on the standard time code input from the reception unit 58. Is corrected, and a signal based on the corrected current time data is output to the analog pointer mechanism 15 to calibrate the displayed time.
[0039]
Further, when the second hand / shield plate 18c is rotated, the CPU 51 specifies a GPS satellite having good radio wave reception sensitivity (for example, a GPS satellite having the highest reception sensitivity) from the plurality of GPS satellites when the patch antenna 31 is rotated. At the same time, it functions as a specific storage unit that stores the position of the non-shielding portion 18d at that time (for example, the angle formed clockwise from the 12 o'clock position to the non-shielding portion 18d) in the position specifying information area 52b in the RAM 52.
Further, the CPU 51 functions as a reading unit that reads the almanac data of the specified GPS satellite from the orbit information area 52c of the RAM 52.
Further, the CPU 51 calculates the azimuth at the current position based on the read almanac data and the position of the unshielded portion 18d when the reception sensitivity of the radio wave from the specified GPS satellite is the best, and calculates the calculated azimuth. It functions as an azimuth calculation means to be stored in the current locality information area 52d of the RAM 52.
Further, the CPU 51 functions as a direction output unit that outputs the calculated direction to the light emitting element 40.
[0040]
Further, the CPU 51 calculates the latitude and longitude of the current location based on the radio wave from the GPS satellite received by the patch antenna 31, and stores the calculated latitude and longitude in the current location specifying information area 52e of the RAM 52. Function as Further, the CPU 51 calculates the azimuth of the destination based on the latitude and longitude of the destination and the latitude and longitude of the current location stored in the destination specifying information area 52f of the RAM 52, and calculates the calculated azimuth as the destination local location. In addition to functioning as a destination location calculating unit that is stored in the information area 52g, it functions as a destination location output unit that outputs the calculated direction of the destination.
In addition, the CPU 51 functions as a light emission control unit that causes the light emitting element 40 at a position corresponding to the calculated current location direction to emit light.
[0041]
As shown in FIG. 5A, a plurality of memory areas are provided in the RAM 52.
That is, when the RAM area 52a and the second hand / shielding plate 18c of the wristwatch 100 used for the work of the CPU 51 are rotated, the position of the non-shielding portion 18d when the radio wave reception sensitivity by the second hand / shielding plate 18c is good (for example, , A position specifying information area 52b as a specific storage means for storing the clockwise angle from the 12 o'clock position to the unshielded portion 18d), and almanac data representing the positions of a plurality of GPS satellites in the sky are stored for each GPS. The orbit information area 52c as the stored orbit information storage means, the azimuth (east, west, north and south) at the current location are calculated, and the current local position information area 52d as the azimuth calculation means for storing the calculated azimuth is received by the patch antenna 31. Latitude and longitude calculation that calculates the latitude and longitude of the current location based on radio waves from GPS satellites and stores the calculated azimuth The current location specifying information area 52e as a step, the destination specifying information area 52f as a destination position storage means for storing the latitude and longitude of the destination, and the latitude and longitude of the destination stored in the destination specifying information area 52f. A destination location information area 52g or the like is provided as destination location calculation means for calculating the direction of the destination based on the latitude and longitude of the current location and storing the calculated direction.
The almanac data may be received from a GPS satellite and stored, or may be stored in the RAM 52 before shipment. FIG. 5B shows the almanac data stored in the RAM 52.
[0042]
The input unit 54 includes a microphone or the like that collects a user's voice. When a sound is input, the sound is converted into an electric signal, and the electric signal is output to the CPU 51. The voice input from the input unit 54 is subjected to voice recognition and the like by a voice control unit 61 described later.
[0043]
The display unit 55 includes the dial 12 and the hands 18 described above, and displays data from the CPU 51, for example, current time data and the like by the clock circuit 57 on the dial 12 via the analog pointer mechanism 15.
[0044]
The ROM 53 is used for storing data processed by the CPU 51 under the control of the CPU 51 and outputting the stored data to the CPU 51. The ROM 53 mainly stores a navigation program, a system program, an application program, and the like related to the wristwatch 100. In particular, it stores an azimuth calculation program 53a for calculating the azimuth of the current location and a destination local position calculation program 53b for calculating the azimuth of the destination according to the present invention.
[0045]
The timer circuit section 57 counts the clock signal input from the oscillation circuit section 56 to obtain current time data and the like. Then, the current time data is output to the CPU 51. The oscillation circuit section 56 always outputs a clock signal having a constant frequency.
[0046]
The receiving unit 58 cuts out unnecessary frequency components of the standard radio wave received by the patch antenna 31, extracts a corresponding frequency signal, and outputs it to the signal processing unit 59. The signal processing unit 59 processes the input frequency signal. To an electrical signal.
[0047]
The voice control unit 61 is for recognizing the position information of the destination inputted by the user by voice, or notifying the user of the position information or the like by voice. Through 62, it controls announcements such as "Arrival at destination" and "Destination is southward from here".
[0048]
Here, a method of calculating the current local position by the azimuth calculation program will be described with reference to FIG.
For example, the second hand / shielding plate 18c is formed in a circular plate whose center angle is cut out by a sector shape. Then, when the north is 0 °, the east is 90 °, the south is 180 °, and the west is 270 ° with respect to the sky at the current position, the orbit of each GPS satellite is obtained by the almanac data shown in FIG. "Satellite 1: 22.5 °, satellite 2: 45 °, satellite 3: 67.5 °, satellite 4: 112.5 °, ...”. For example, it can be seen that the satellite 1 is located 22.5 ° east from north on the sky. That is, the position 22.5 ° west of the satellite 1 in the sky is north.
For example, assuming that the sensitivity of the satellite 1 becomes the highest when the unshielded portion 18d is 292.5 ° clockwise from the 12 o'clock position of the dial 12, the satellite 1 is 22.5 ° east from the north. 6, the north direction in FIG. 6 is a position of 292.5 ° −22.5 ° = 270 °, that is, a direction of 9 o'clock on the dial 12. Once North is determined, the remaining directions can be easily determined. East is the direction of 12:00 on the dial 12, south is the direction of 3 o'clock on the dial 12, and west is the direction of 6 o'clock on the dial 12.
[0049]
Next, navigation processing to the destination by the wristwatch 100 having the above-described structure will be described with reference to flowcharts shown in FIGS.
As shown in FIG. 7, first, the user wearing the wristwatch 100 inputs the latitude and longitude of the destination by voice from the input unit 54 (step S1). Next, the receiving unit 58 receives the ephemeris data from the GPS satellites via the patch antenna 31, and the CPU 51 calculates the latitude and longitude of the current location based on the ephemeris data and stores them in the RAM 52 (step S2).
[0050]
Next, the CPU 51 determines whether or not the latitude and longitude of the current location match the latitude and longitude of the destination (step S3). If the CPU 51 determines that the latitude and the longitude are the same (step S3; Yes), the CPU 51 sends an instruction signal to the voice control unit 61, and A sound such as "Arrival at destination" is generated. On the other hand, if the CPU 51 determines that the latitude and longitude do not match (step S3; No), it means that the user has not arrived at the destination, so the CPU 51 calculates the azimuth of the current location (step S3). S4).
[0051]
Next, the CPU 51 calculates the direction of the destination to which the user should go from the difference between the input latitude and longitude of the destination and the calculated latitude and longitude of the current location (step S5).
Next, the CPU 51 causes the light emitting element 40 located in the direction of the destination calculated in step S5 to emit light in the second color (step S6).
Next, the CPU 51 determines whether or not an end signal for terminating the present process has been input (step S7). If it is determined that the end signal has not been input (step S7; No), step S2 is performed again. However, if it is determined that the end signal has been input (step S7; Yes), the present process is ended.
[0052]
Next, the process of calculating the current local position in step S4 will be described with reference to FIG.
When the process shown in FIG. 8 is started, first, the CPU 51 performs an initial setting (n = 1) for setting the number of GPS satellites to be specified (step S10).
Next, the CPU 51 receives the ephemeris data transmitted from the GPS satellite by the receiving unit 58 via the patch antenna 31 while rotating the second hand / shield plate 18c of the wristwatch 100, and stores the data in the position specifying information area 52b of the RAM 52. (Step S11). Then, when the second hand / shield plate 18c is rotated once, the CPU 51 specifies a GPS satellite having the nth (eg, first) reception sensitivity of the ephemeris data (step S12).
Next, the CPU 51 stores, in the RAM 52, the position of the second hand / shield plate 18c when the specified GPS satellite has the highest reception sensitivity, that is, the angle formed clockwise from the 12 o'clock position to the unshielded portion 18d (step). S13).
[0053]
Next, the CPU 51 searches for and reads almanac data of a GPS satellite having the highest reception sensitivity (step S14). Next, the CPU 51 adds 1 to n (step S15). Next, the CPU 51 determines whether or not “n = 4” (step S16). At this point, since n = 2, the CPU 51 returns to step S11 again and repeats steps S11 to S15. In step S12 of the second cycle, a GPS satellite having the second highest reception sensitivity is specified.
[0054]
The CPU 51 repeats a series of operations three times in accordance with the above procedure. When the CPU 51 determines that n = 4 (step S16; Yes), the CPU 51 determines the positions of the non-shielding portions 18d when the three GPS satellites are specified and the almanac data of the three specified GPS satellites. The north direction at the current location is calculated, and the calculated north directions are determined, for example, by averaging, and stored in the current locality information area 52d of the RAM 52 (step S17).
After obtaining the north azimuth, the CPU 51 calculates other azimuths (for example, east, west, and south azimuths) and stores them in the current locality information area 52d of the RAM 52 (step S18). Next, the CPU 51 turns on the light emitting element 40 located in the north direction in the first color (step S19).
[0055]
According to the wristwatch 100 of the first embodiment, when the second hand and shielding plate 18c is rotated, the azimuth of the current position is calculated based on the position of the unshielded portion 18d and the almanac data of the GPS satellite, Since the user can be notified by turning on the light emitting element 40, the user can obtain the direction only by rotating the second hand / shield plate 18c. Therefore, the user can calculate the bearing without moving. Further, since it is not necessary to use a magnetic azimuth sensor, it is not necessary to take noise countermeasures, and it can be mounted on a small electronic device such as the wristwatch 100.
[0056]
Further, the light emitting element 40 at the position corresponding to the north direction of the current local position is displayed in the first color, and the light emitting element 40 at the position corresponding to the calculated moving direction is different from the light emitting element indicating the north direction. Since the light is illuminated in color, the user can easily confirm it visually and can easily perform the navigation operation.
Further, since the second hand and the shield plate of the wristwatch 100 are shared, the number of parts can be reduced, and the production cost can be reduced.
[0057]
[Second embodiment]
A wristwatch 200 according to a second embodiment of the present invention will be described.
In describing the wristwatch 200 of the second embodiment, a description of the same configuration as the above-described wristwatch 100 will be omitted.
As shown in FIGS. 9 and 10, a wristwatch 200 according to the second embodiment covers a part of the upper surface of a patch antenna 31 serving as a receiving antenna, shields the arrival of radio waves to the patch antenna 31, and A second hand / shield plate 28c as a shield member rotatably provided with respect to the antenna 31 is provided.
[0058]
For example, as shown in FIG. 11A, the second hand / shielding plate 28c is formed in a fan shape having substantially the same size as the non-shielding portion 18d of the second hand / shielding plate 18c in the first embodiment. Are formed so as to be larger than the outer diameter of the patch antenna 31. Also, since it also serves as the second hand, it is attached to the pointer shaft 17 so as to make one rotation in 60 seconds. As shown in FIG. 11B, the second hand / shielding plate 28c has a directional characteristic such that radio waves from GPS satellites can be strongly received in places other than near the tip of the second hand / shielding plate 28c.
[0059]
Next, a structure for realizing the function of the navigation program of the wristwatch 200 will be described with reference to FIG.
Specifically, as shown in FIG. 12, the wristwatch 200 includes a CPU 66, a RAM 67, a ROM 68, an input unit 69 for inputting the latitude and longitude of the destination by voice, a display unit 70 for displaying time and other information, and a clock. An oscillation circuit section 71 for transmitting a signal, a clock circuit section 72 for receiving and controlling a time by receiving a clock signal, a receiving section 73 for receiving position information from a GPS satellite received by the patch antenna 31, and a receiving section 73 for receiving position information A signal processing unit 74 for converting the position information, a voice control unit 76 for informing the user of the direction of the destination to be directed to the user via a speaker 77 for informing the user of the direction of the destination, and the like are provided. The components except the receiving unit 73 and the patch antenna 31 are connected by a bus 79.
[0060]
The CPU 66 reads various programs stored in the ROM 68 at a predetermined timing or in response to a sound input from the input unit 69, expands the programs in the RAM area 67a in the RAM 67, and sends the programs to the respective functional units based on the programs. It performs instructions and data transfer. In particular, the CPU 66 controls the receiving unit 73, for example, at predetermined time intervals, executes a receiving process of the standard time signal, and counts the current time data counted by the time counting circuit unit 72 based on the standard time code input from the receiving unit 73. Is corrected, and a signal based on the corrected current time data is output to the analog pointer mechanism 15 to calibrate the displayed time.
[0061]
Further, when the second hand / shielding plate 28c is rotated, the CPU 66 specifies a GPS satellite having poor radio wave reception sensitivity (for example, a GPS satellite having the lowest reception sensitivity) from the plurality of GPS satellites when the patch antenna 31 is rotated. At the same time, it functions as a specific storage unit that stores the position of the second hand / shielding plate 28c at that time (for example, the angle formed clockwise from the 12 o'clock position to the second hand / shielding plate 28c) in the position specifying information area 67b in the RAM 67. .
Further, the CPU 66 functions as a reading unit that reads the almanac data of the specified GPS satellite from the orbit information area 67c in the RAM 67. Further, the CPU 66 calculates the azimuth at the current position based on the read almanac data and the position of the second hand / shielding plate 28c when the reception sensitivity of the specified radio wave from the GPS satellite is the worst, and stores the calculated azimuth in the RAM 67. Functions as the azimuth calculation means stored in the current local position information area 67d. Further, the CPU 66 functions as a direction output unit that outputs the calculated direction to the light emitting element 40.
[0062]
Further, the CPU 66 calculates the latitude and longitude of the current location based on the radio wave from the GPS satellite received by the patch antenna 31 and stores the calculated latitude and longitude in the current location specifying information area 67 e of the RAM 67. Function as Further, the CPU 66 calculates the azimuth of the destination based on the latitude and longitude of the destination and the latitude and longitude of the current location stored in the destination specifying information area 67f of the RAM 67, and stores the calculated azimuth in the destination of the RAM 67. In addition to functioning as a destination local position calculating unit that is stored in the local position information area 67g, it functions as a destination local position output unit that outputs the calculated direction of the destination.
As described above, the RAM 67 is provided with a plurality of memory areas as shown in FIG.
Note that the other components have the same configuration as the above-described wristwatch 100, and a description thereof will be omitted.
[0063]
Next, navigation processing to the destination by the wristwatch 200 will be described. Note that the only difference from the first embodiment is (step S4) in FIG. 7, that is, the process of calculating the current position, and thus such a portion will be described with reference to FIG. 14, and other description will be omitted. .
[0064]
When the process shown in FIG. 14 is started, first, the CPU 66 performs an initial setting (n = 1) for setting the number of GPS satellites to be specified (step S20).
Next, the CPU 66 causes the receiver 73 to receive the ephemeris data transmitted from the GPS satellites via the patch antenna 31 while rotating the second hand / shielding plate 28c of the wristwatch 200, and stores the data in the RAM 67 (step S21).
Then, when the second hand and shielding plate 28c is rotated once, a GPS satellite having the nth (eg, first) reception sensitivity of the ephemeris data is specified (step S22). Next, the CPU 66 stores in the RAM 67 the position of the second hand / shielding plate 28c when the reception sensitivity of the specified GPS satellite is the worst, that is, the angle formed clockwise from the 12 o'clock position to the position indicated by the second hand / shielding plate 28c. It is stored (step S23).
[0065]
Next, the CPU 66 searches for and reads almanac data of a GPS satellite having the lowest reception sensitivity (step S24). Next, the CPU 66 adds 1 to n (S25). Next, the CPU 66 determines whether or not “n = 4” (step S26). At this time, since n = 2, the CPU 66 returns to step S21 again and repeats the processing of steps S21 to S25. Do. In step S22 of the second cycle, a GPS satellite having the second lowest reception sensitivity is specified.
[0066]
The CPU 66 repeats a series of operations three times in accordance with the above procedure. Then, if the CPU 66 determines that n = 4 (step S26; Yes), the position of each second hand / shield plate 28c when three GPS satellites are specified, and the almanac data of the three specified GPS satellites, Then, the north direction at the current position is calculated from the above, and the calculated north directions are determined, for example, by averaging, and stored in the current local position information area 67d of the RAM 67 (step S27).
After obtaining the north azimuth, the CPU 66 calculates other azimuths (for example, east, west, and south azimuths) and stores them in the current locality information area 67d of the RAM 67 (step S28). After calculating all the directions, the CPU 66 turns on the light emitting element 41 located in the north direction in the first color (step S29).
[0067]
According to the wristwatch 200 of the second embodiment, when the second hand / shield plate 28c is rotated, the azimuth of the current position is calculated based on the position of the second hand / shield plate 28c and the almanac data of the GPS satellite. The user can be notified by turning on the light emitting element 41, so that the user can obtain the azimuth only by rotating the second hand / shield plate 28c. Therefore, the user can calculate the bearing without moving. Further, since it is not necessary to use a magnetic azimuth sensor, it is not necessary to take measures against noise, and it can be mounted on a small electronic device such as the wristwatch 200.
[0068]
Also, the light emitting element 41 at the position corresponding to the north direction of the current local position is displayed in the first color, and the light emitting element 41 at the position corresponding to the calculated moving direction is the second light emitting element different from the light emitting element indicating the north direction. Since the light is emitted in this color, the user can easily confirm it visually, and the navigation operation can be facilitated.
Further, since the second hand and the shielding plate of the wristwatch 200 are shared, the number of parts can be reduced, and the production cost can be reduced.
[0069]
[Third embodiment]
A wristwatch 300 according to a third embodiment of the present invention will be described.
In describing the wristwatch 200 of the third embodiment, a description of the same configuration as the above-described wristwatch 100 will be omitted.
As shown in FIGS. 15 and 16, a wristwatch 300 according to the third embodiment has a second hand formed by an antenna.
[0070]
As shown in FIG. 17A, the second hand / antenna 38c is a very common rod-shaped one and is formed from an antenna. Therefore, by rotating the second hand and antenna 38c, the functions of the second hand and the antenna are simultaneously exhibited, and thus, in the wristwatch 300, the above-described patch antenna is not provided below the second hand. As shown in FIG. 17B, the second hand / antenna 38c has a directional characteristic such that only a location near the second hand / antenna 38c can strongly receive a radio wave from a GPS satellite.
[0071]
Next, a structure for realizing the function of the navigation program of the wristwatch 300 will be described with reference to FIG.
Specifically, as shown in FIG. 18, the wristwatch 300 includes a CPU 81, a RAM 82, a ROM 83, an input unit 84 for inputting the latitude and longitude of the destination by voice, a display unit 85 for displaying time and other information, a clock An oscillation circuit section 86 for transmitting a signal, a clock circuit section 87 for receiving and measuring a clock signal to measure and manage time, a receiving section 88 for receiving position information from a GPS satellite received by the second hand / antenna 38c, and a receiving section 88 A signal processing unit 89 for converting the obtained position information, a voice control unit 91 for notifying the user of the direction of the destination to be reached via a speaker 92 for notifying the user of the direction of the destination, and the like, and an oscillation circuit unit. The respective units except the 86, the receiving unit 88, and the second hand / antenna 38c are connected by a bus 94.
[0072]
The CPU 81 reads various programs stored in the ROM 83 and develops them in the RAM 82 at a predetermined timing or in response to a sound input from the input unit 84, and based on the programs, issues instructions and data to each functional unit based on the programs. Perform transfer, etc. In particular, the CPU 81 controls the receiving unit 88, for example, at predetermined time intervals, executes a receiving process of the standard radio wave, and counts the current time data counted by the time counting circuit unit 87 based on the standard time code input from the receiving unit 88. Is corrected, and a signal based on the corrected current time data is output to the analog pointer mechanism 15 to calibrate the displayed time.
[0073]
Further, when the second hand and antenna 38c is rotated, the CPU 81 specifies a GPS satellite having good radio wave reception sensitivity (for example, a GPS satellite having the highest reception sensitivity) from the plurality of GPS satellites when the second hand and antenna 38c is rotated. At the same time, it functions as a specific storage unit that stores the position of the second hand / antenna 38c at that time (for example, the angle formed clockwise from the 12 o'clock position to the second hand / antenna 38c) in the position specifying information area 82b in the RAM 82.
Further, the CPU 81 functions as a reading unit that reads the almanac data of the specified GPS satellite from the orbit information area 82c in the RAM 82. Further, the CPU 81 calculates the azimuth at the current location based on the read almanac data and the position of the second hand / antenna 38c when the reception sensitivity of the specified radio wave from the GPS satellite is the best, and stores the calculated azimuth in the RAM 82. Functions as the azimuth calculating means stored in the current local position information area 82d. Further, the CPU 81 functions as a direction output unit that outputs the calculated direction to the light emitting element 40.
[0074]
Further, the CPU 81 calculates the latitude and longitude of the current location based on the radio wave from the GPS satellite received by the second hand / antenna 38c, and stores the calculated latitude and longitude in the current location specifying information area 82e of the RAM 82. Functions as a means. Further, the CPU 81 calculates the orientation of the destination based on the latitude and longitude of the destination and the latitude and longitude of the current location stored in the destination identification information area 82f of the RAM 82, and stores the calculated orientation in the destination of the RAM 82. In addition to functioning as a destination local position calculating unit that is stored in the local position information area 82g, it functions as a destination local position output unit that outputs the calculated direction of the destination.
Thus, the RAM 82 is provided with a plurality of memory areas as shown in FIG.
Note that the other components have the same configuration as the above-described wristwatch 100 and wristwatch 200, and thus description thereof will be omitted.
[0075]
Next, a navigation process to the destination by the wristwatch 300 will be described. The only difference from the first embodiment is (step S4) in FIG. 7, that is, the process of calculating the current local position. Therefore, such a portion will be described with reference to FIG. 20, and the other description will be omitted. I do.
[0076]
First, the CPU 81 performs an initial setting (n = 1) for setting the number of GPS satellites to be specified (step S30).
Next, while rotating the second hand / antenna 38c of the wristwatch 300, the receiving unit 88 receives the ephemeris data transmitted from the GPS satellite via the second hand / antenna 38c and stores it in the RAM 82 (step S31). Then, when the second hand / antenna 38c is rotated once, the CPU 81 specifies a GPS satellite having the nth (eg, first) reception sensitivity of the ephemeris data (step S32).
Next, the position of the second hand / antenna 38c when the reception sensitivity of the specified GPS satellite is the best, that is, the angle formed clockwise from the 12 o'clock position to the position indicated by the second hand / antenna 38c is determined by the position of the RAM 82. It is stored in the specific information area 82b (step S33).
[0077]
Next, the CPU 81 searches for and reads almanac data of a GPS satellite having the best reception sensitivity (step S34). Next, the CPU 81 adds 1 to n (S35). Next, the CPU 81 determines whether or not “n = 4” (step S36). At this point, since n = 2, the CPU 81 returns to step S31 and repeats steps S31 to S35. . In step S32 of the second cycle, a GPS satellite having the second best reception sensitivity is specified.
[0078]
The CPU 81 repeats a series of operations four times in accordance with the above procedure. If the CPU 81 determines that n = 4 (step S36; YES), the CPU 81 determines the position of the second hand / antenna 38c when the three GPS satellites are specified and the almanac data of the three specified GPS satellites. The north direction at the current location is calculated, and the calculated north directions are determined, for example, by averaging, and then stored in the current local position information area 82d of the RAM 82 (step S37). After obtaining the north azimuth, the CPU 81 calculates other azimuths (for example, east, west, and south azimuths) and stores them in the current locality information area 82d of the RAM 82 (step S38). Next, the CPU 81 turns on the light emitting element 42 located in the north direction in the first color (step S39).
[0079]
According to the wristwatch 300 of the third embodiment, when the second hand / antenna 38c is rotated, the azimuth of the current position is calculated and output based on the position of the second hand / antenna and the orbit information of the GPS satellite. Therefore, the user can obtain the direction only by rotating the second hand and antenna 38c. Therefore, the user can calculate the bearing without moving. Further, since there is no need to use a magnetic direction sensor, there is no need to take noise countermeasures, and it can be mounted on a small electronic device such as a wristwatch.
[0080]
Further, the light emitting element 42 at the position corresponding to the north direction of the current local position is displayed in the first color, and the light emitting element 42 at the position corresponding to the calculated moving direction is different from the light emitting element 42 indicating the north direction. Since the light is emitted in this color, the user can easily confirm it visually, and the navigation operation can be facilitated.
In addition, since the second hand and the shield plate of the wristwatch 300 are shared, the number of parts can be reduced, and the production cost can be reduced.
[0081]
Note that the present invention is not limited to the above embodiment. For example, the display method of the destination region is not limited to the display by the light emission of the light emitting element, but may be a method using a liquid crystal, for example. The scale of the dial of the wristwatch may be made to emit light. Further, a rod-shaped antenna may be provided separately from the hour hand, minute hand and second hand, and the antenna may be rotated on the dial. Further, the ephemeris data does not have to be acquired three times. For example, the ephemeris data may be acquired only once for the GPS satellite having the best reception sensitivity or the worst GPS satellite. In addition, a GPS satellite used for obtaining the direction of the current location may be determined in advance. Further, when measuring the azimuth of the current position, the rotation may be performed in a shorter time instead of 60 seconds. In addition, changes can be made without departing from the spirit of the invention.
[0082]
【The invention's effect】
According to the first aspect of the present invention, the user can obtain the azimuth only by rotating the shielding member. Therefore, the user can calculate the bearing without moving. Further, since there is no need to use a magnetic direction sensor, there is no need to take noise countermeasures, and it can be mounted on a small electronic device such as a wristwatch.
[0083]
According to the second aspect of the invention, the user can obtain the azimuth only by rotating the shielding member. Therefore, the user can calculate the bearing without moving. Further, since there is no need to use a magnetic direction sensor, there is no need to take noise countermeasures, and it can be mounted on a small electronic device such as a wristwatch.
[0084]
According to the third aspect of the present invention, the user can obtain the direction only by rotating the receiving antenna. Therefore, the user can calculate the bearing without moving. Further, since there is no need to use a magnetic direction sensor, there is no need to take noise countermeasures, and it can be mounted on a small electronic device such as a wristwatch.
[0085]
According to the fourth aspect of the invention, since the shielding member is configured to make one rotation in 60 seconds, it can be used as a second hand of a timepiece.
[0086]
According to the fifth aspect of the invention, since the receiving antenna is configured to make one rotation in 60 seconds, it can be used as a second hand of a timepiece.
[0087]
According to the invention described in claim 6, the user can obtain the bearing only by storing the latitude and longitude of the destination. Therefore, the user can calculate the bearing without moving.
[0088]
According to the invention described in claim 7, the non-shielding portion can be easily formed.
[0089]
According to the eighth aspect of the present invention, the user can easily confirm visually and the navigation operation can be facilitated.
[0090]
According to the ninth aspect, the user can calculate the azimuth without moving. Further, since there is no need to use a magnetic direction sensor, there is no need to take noise countermeasures, and it can be mounted on a small electronic device such as a wristwatch.
[0091]
According to the tenth aspect, the user can calculate the bearing without moving. Further, since there is no need to use a magnetic direction sensor, there is no need to take noise countermeasures, and it can be mounted on a small electronic device such as a wristwatch.
[0092]
According to the eleventh aspect, the user can calculate the azimuth without moving. Further, since there is no need to use a magnetic direction sensor, there is no need to take noise countermeasures, and it can be mounted on a small electronic device such as a wristwatch.
[Brief description of the drawings]
FIG. 1 is a partially omitted front view showing a wristwatch according to a first embodiment of the present invention.
FIG. 2 is an enlarged sectional view of a main part of the wristwatch taken along line II-II in FIG.
FIG. 3 is an explanatory diagram showing the structure and directional characteristics of the patch antenna according to the first embodiment of the present invention.
FIG. 4 is a block diagram of a main part of the wristwatch according to the first embodiment of the present invention.
FIG. 5 is an explanatory diagram for describing a configuration in a RAM according to the first embodiment of the present invention.
FIG. 6 is an explanatory diagram for calculating an azimuth in the first embodiment of the present invention.
FIG. 7 is a flowchart illustrating a navigation process according to the first to third embodiments of the present invention.
FIG. 8 is a flowchart illustrating a process of calculating a current local position according to the first embodiment of the present invention.
FIG. 9 is a partially omitted front view showing a wristwatch according to a second embodiment of the present invention.
FIG. 10 is an enlarged sectional view of a main part of the wristwatch taken along line XX in FIG. 1;
FIG. 11 is an explanatory diagram illustrating a structure and a directional characteristic of a patch antenna according to a second embodiment of the present invention.
FIG. 12 is a block diagram of a main part of a wristwatch according to a second embodiment of the present invention.
FIG. 13 is an explanatory diagram for describing a configuration in a RAM according to the second embodiment of the present invention.
FIG. 14 is a flowchart illustrating a current local position calculation process according to the second embodiment of the present invention.
FIG. 15 is a partially omitted front view showing a wristwatch according to a third embodiment of the present invention.
16 is an enlarged sectional view of a main part of the wristwatch taken along line XV-XV in FIG. 1;
FIG. 17 is an explanatory diagram showing a structure and a directional characteristic of a patch antenna according to a third embodiment of the present invention.
FIG. 18 is a block diagram of a main part of a wristwatch according to a third embodiment of the present invention.
FIG. 19 is an explanatory diagram for describing a configuration in a RAM according to the third embodiment of the present invention.
FIG. 20 is a flowchart illustrating a current local position calculation process according to the third embodiment of the present invention.
[Explanation of symbols]
18d non-shielding part
18c Second hand and shielding plate (shielding member)
28c Second hand and shielding plate (shielding member)
38c second hand and antenna (receiving antenna)
31 patch antenna (receiving antenna)
40, 41, 42 light emitting element (light emitting unit)
51 CPU (reading means, azimuth calculation means, azimuth output means, latitude / longitude calculation means, target local position calculation means, target local position output means, light emission control means)
52 RAM (track information storage means, specific storage means, destination position storage means)
53 ROM

Claims (11)

A receiving antenna for receiving radio waves from GPS satellites,
A shielding member that covers an upper part of the receiving antenna and shields the arrival of radio waves to the receiving antenna, and a non-shielding part is formed in part, and is rotatably provided with respect to the receiving antenna.
Orbit information storage means for storing orbit information representing the positions of a plurality of GPS satellites in the sky for each GPS satellite;
When the shielding member is rotated, a specific storage means for specifying a GPS satellite having good radio wave reception sensitivity by the receiving antenna from the plurality of GPS satellites and storing a position of the non-shielding portion at that time. When,
Reading means for reading out the orbit information of the GPS satellite specified by the specific storage means from the orbit information storage means;
Azimuth calculating means for calculating the azimuth at the current position based on the position of the non-shielded portion stored by the specific storage means and the orbit information of the GPS satellite read by the reading means;
Azimuth output means for outputting the azimuth calculated by the azimuth calculation means,
An electronic device comprising: A receiving antenna for receiving radio waves from GPS satellites,
While covering a part of the upper surface of the receiving antenna, and blocking the arrival of radio waves to the receiving antenna, the shielding member rotatably provided with respect to the receiving antenna, and the position of a plurality of GPS satellites on the sky Orbit information storage means for storing orbit information to be represented for each GPS satellite,
When the shielding member is rotated, a specific storage means for identifying a GPS satellite having poor reception sensitivity of radio waves by the receiving antenna from the plurality of GPS satellites, and storing a position of the shielding member at that time,
Reading means for reading out the orbit information of the GPS satellite specified by the specific storage means from the orbit information storage means;
Azimuth calculating means for calculating the azimuth at the current position based on the position of the shielding member stored by the specific storage means and the orbit information of the GPS satellite read by the reading means;
Azimuth output means for outputting the azimuth calculated by the azimuth calculation means,
An electronic device comprising: A receiving antenna that receives radio waves from GPS satellites while rotating,
Orbit information storage means for storing orbit information representing the positions of a plurality of GPS satellites in the sky for each GPS satellite;
When the receiving antenna is rotated, a specific storage unit that specifies a GPS satellite having good radio wave reception sensitivity from the plurality of GPS satellites and stores the position of the receiving antenna at that time. ,
Reading means for reading out the orbit information of the GPS satellite specified by the specific storage means from the orbit information storage means;
Azimuth calculating means for calculating the azimuth at the current position based on the position of the receiving antenna stored by the specific storage means and the orbit information of the GPS satellite read by the reading means;
Azimuth output means for outputting the azimuth calculated by the azimuth calculation means,
An electronic device comprising: The electronic device according to claim 1, wherein the shielding member is configured to make one rotation in 60 seconds. The electronic device according to claim 3, wherein the receiving antenna is configured to make one rotation in 60 seconds. Destination location storage means for storing the latitude and longitude of the destination,
Latitude and longitude calculating means for calculating the latitude and longitude at the current position based on the radio wave received by the receiving antenna,
Destination local position calculating means for calculating the direction of the destination based on the latitude and longitude of the destination stored in the destination position storing means and the latitude and longitude of the current position calculated by the latitude and longitude calculating means When,
Destination location output means for outputting the direction of the destination calculated by the destination location calculation means,
The electronic device according to any one of claims 1 to 5, further comprising: The electronic device according to claim 1, wherein the non-shielding portion is formed by cutting off a part of the shielding member. The azimuth output means,
Light-emitting units arranged at predetermined intervals in the circumferential direction,
A light emission control unit that causes the light emitting unit at a position corresponding to the direction calculated by the direction calculation unit to emit light,
The electronic device according to any one of claims 1 to 7, further comprising: A receiving antenna for receiving a radio wave from a GPS satellite, and covering an upper portion of the receiving antenna to shield the arrival of the radio wave to the receiving antenna and partially forming an unshielded portion, An electronic device comprising: a rotatable shielding member; orbit information storage means for storing orbit information representing the positions of a plurality of GPS satellites in the sky for each GPS satellite; and predetermined output means. On the computer,
When the shielding member is rotated, a function of storing a position of the non-shielding portion at that time while identifying a GPS satellite having a good reception sensitivity of radio waves by the receiving antenna from the plurality of GPS satellites,
A function of reading orbit information of the specified GPS satellite from the orbit information storage means,
A function of calculating the azimuth at the current position based on the stored position of the non-shielding portion and the orbit information of the GPS satellite read from the orbit information storage means;
A function of outputting the calculated orientation by the output means,
The program to realize. A receiving antenna that receives a radio wave from a GPS satellite, and a shielding member that covers a part of the upper surface of the receiving antenna, blocks arrival of the radio wave to the receiving antenna, and is rotatably provided to the receiving antenna. And orbit information storage means for storing orbit information representing the positions of a plurality of GPS satellites in the sky for each GPS; and a computer of an electronic device comprising predetermined output means.
When the shielding member is rotated, a GPS satellite having poor reception sensitivity of radio waves by the receiving antenna is specified from among the plurality of GPS satellites, and a function of storing a position of the shielding member at that time,
A function of reading orbit information of the specified GPS satellite from the orbit information storage means,
A function of calculating the azimuth at the current position based on the stored position of the shielding member and the orbit information of the GPS satellite read from the orbit information storage means;
A function of outputting the calculated orientation by the output means,
The program to realize. A receiving antenna for receiving radio waves from the GPS satellites while rotating, orbit information storage means for storing orbital information representing the positions of the plurality of GPS satellites in the sky for each GPS satellite, and predetermined output means; Computer of electronic equipment
A function of, when the receiving antenna is rotated, identifying a GPS satellite having good reception sensitivity of radio waves by the receiving antenna from among the plurality of GPS satellites, and storing a position of the receiving antenna at that time;
A function of reading orbit information of the specified GPS satellite from the orbit information storage means,
A function of calculating the azimuth at the current position based on the stored position of the receiving antenna and the orbit information of the GPS satellite read from the orbit information storage means;
A function of outputting the calculated orientation by the output means,
The program to realize.

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