JPH0719889A - Navigation apparatus - Google Patents

Abstract

PURPOSE:To easily and smoothly arrive at a destination by a method wherein a direction calculation means for calculating the direction of the destination from a present place so that the direction is observed. CONSTITUTION:A direction of a destination from starting place is calculated based on the inputted starting place, longitude and latitude of the destination and data of a direction sensor 27 to be stored and indicated on an indication section 8. A reception signal from an electromagnetic induction coil is inputted to a CPU 25 for every one rotation of a front wheel to be counted. A speed and an integrated distance are calculated and stored so that traveling data is indicated. Further, a direction after a prescribed period of time is measured and longitude and latitude at that time is measured. The longitudes and latitudes of a moved present place and the destination are compared with each other and the direction of the destination is calculated to be stored in a RAM 26. It is judged whether the direction of the destination from the moved present place is deviated from the direction of that stored in a memory at an angle of 90 degrees or more. When there is the deviation therebetween, the direction of the destination is indicated on the indication section 8 and the operations are repeated. When a vehicle is driven toward the indicated direction, it is possible to easily arrive at the destination.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device mounted on a moving body.

[0002]

2. Description of the Related Art Conventionally, a bicycle traveling data display device (hereinafter referred to as a cycle computer) has been known as a device mounted on a bicycle. This cycle computer is composed of a key for entering the circumference of the bicycle wheel and the distance to the target point, and a rotation detection device that detects the rotation of the wheel. As you type, the value is displayed. Further, the rotation detection device wirelessly transmits a magnet attached to the spokes of the front wheels, a magnetic detection unit fixed to the vehicle body side and located outside the rotational trajectory of the magnet, and a magnetic detection signal from the magnetic detection unit. It is composed of a transmitter and a receiver that receives a signal from the transmitter.

Then, as the bicycle rotates, the front wheels rotate, and when the magnets attached to the spokes pass through the inside of the magnetism detecting portion, the magnetism detecting portion detects the magnetism and the transmitter detects the magnetism. The pulse signal is wirelessly transmitted in synchronization with. Then, the receiver receives the pulse signal, detects the start of the bicycle, counts the passage of the magnet thereafter, and calculates the integrated distance by the "integrated count number × perimeter". Further, the speed (hour speed) is calculated by “(3600 / count cycle) × perimeter”, and the calculated integrated distance and speed are displayed on the display unit provided on the receiver side. Therefore,
By comparing the distance to the target point displayed in advance and the calculated integrated distance, it is possible to know whether or not the vehicle has traveled the distance to the target point.

[0004]

However, the conventional cycle computer merely displays the input distance to the target point and the total distance traveled. Therefore, even if it is possible to confirm that the vehicle has traveled the distance to the destination by comparing the two, it is not possible to know in which direction the destination is in the traveling process. It did not help to reach the destination smoothly.

The present invention has been made in view of such conventional problems, and provides a navigation device capable of knowing the direction of a destination in a moving process of moving from a starting point to a destination. The purpose is to do.

[0006]

In order to solve the above problems, according to the present invention, an input means for inputting the longitude and latitude of a starting point and a destination, and a moving body which has started moving from the starting point are provided. A moving azimuth detecting unit that detects a moving azimuth, a moving distance detecting unit that detects a moving distance of the moving body, and a current position of the moving body based on the azimuth and the moving distance detected by each detecting unit. At the present position, based on the longitude and latitude of the current point calculated by the calculating unit and the longitude and latitude of the destination, and the azimuth of the destination at the current point. It is provided with a calculating means and a display means for displaying the azimuth calculated by the azimuth calculating means.

[0007]

In the above structure, when a moving body such as a bicycle starts moving from the starting point, the moving direction detecting means detects the moving direction and the moving distance detecting means detects the moving distance. At this time, since the longitude and latitude of the departure point are input in advance, the longitude and latitude at each point starting from the departure point can be calculated based on the moving direction and the moving distance, and the current position is calculated. The means thus calculates the longitude and latitude at each point. On the other hand, since the longitude and latitude of the destination have been input in advance, if the longitude and latitude at each position are calculated, the azimuth calculation means can calculate the azimuth of the destination at the position. The direction of the destination calculated by the direction calculation means is displayed by the display means.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a bicycle 1 to which an embodiment of the present invention is applied.
FIG. 4 is a side view of the bicycle 1 in which the magnets 4 are attached to the spokes 3 of the front wheel 2 of the bicycle 1. On the other hand, a transmitter 6 is fixed to the vehicle body 5 of the bicycle 1 outside the rotation track of the magnet 4, and a receiver 7 is attached to a handle 5a above the transmitter 6. On the upper surface of the receiver 7, FIG.
As shown in FIG. 5, a display unit 8 composed of an LCD is provided, and a longitude input key 9 for inputting a longitude, a latitude input key 10 for inputting a latitude, and a STAR are provided on a peripheral portion.
A T key 11 and an END key 12 are provided.

FIG. 3 is a circuit diagram of the transmitter 6. The reed switch 13 shown in the figure is normally off and is turned on when the magnet 4 passes through the inside of the transmitter 6 as the front wheel 2 rotates, and the reed switch signal a is detected.
Output to 4. The detection circuit 14 has an oscillation circuit 15 inside.
When the reed switch signal a from the reed switch 13 is received, it is converted into a continuous clock signal b and sent to the base terminal of the NPN type transistor 19 through the resistor 18. A capacitor 20 is connected between the collector terminal and the emitter terminal of the transistor 19, the collector terminal is connected to one end of the electromagnetic induction coil 21, and the emitter terminal is connected to the detection circuit 14.
At the other end of the electromagnetic induction coil 21 and one end of the capacitor 22,
The voltage Vcc is applied through the resistor 23, and the capacitor 2
The other end of 2 is connected to the emitter terminal of the transistor 19. Therefore, the clock signal b is
When it is given from 9, the electromagnetic induction coil 21 outputs an electromagnetic induction signal.

FIG. 4 is a block circuit diagram showing the configuration of the receiver 7. In the figure, an electromagnetic induction signal from the electromagnetic induction coil 21 of the transmitter 6 is received by a reception unit 24 having an electromagnetic induction coil (not shown), and the CPU 25
Sent to. The CPU 25 is a program RO (not shown).
A process for operating the receiver 7 as a whole by operating in accordance with a program stored in M, data stored in the RAM 26, and the like, and detecting the moving direction and moving distance of the bicycle 1 at regular time intervals. It executes the process of calculating the longitude and latitude of the position, the process of calculating the azimuth of the destination, and controls the display unit 8 via the display drive circuit 31. An output signal is given to the CPU 25 from an azimuth sensor 27 that constantly detects the azimuth, a key input unit 29 including the plurality of keys 10 to 12, and a clock circuit 30 that generates a clock signal of a constant frequency.

The RAM 26 is provided with registers 26a to 26l schematically shown in FIG. That is, the register 26a is a clock register that stores the current time measured based on the clock input from the clock circuit 30, and the register 26b stores the circumferential length data of the tire of the front wheel 2 that is input in advance. . Register 26c
Is calculated by "(3600 / count cycle) x circumference" based on the count cycle (seconds) from the on (count) state to the next on state when the magnet 4 passes near the transmitter 6. The traveling speed is stored in the register 26d, and the traveling distance calculated by "integrated count number × perimeter" is stored in the register 26d. The longitude of the departure point input by operating the longitude input key 9 is stored in the register 26e,
The register 26f stores the latitude of the departure point input by operating the latitude input key 10. The register 26g stores the longitude of the destination input by operating the longitude input key 9, and the register 26h stores the latitude of the destination input by operating the latitude input key 10. The register 26i stores the direction of the destination at the starting point detected by the direction sensor 27,
The register 26j stores the longitude of the current location at regular time intervals. Further, the register 26k stores the latitude of the current point at regular intervals, and the register 26l stores the direction of the destination at the current point.

In this embodiment having the above structure, C
The PU 25 operates according to the flowchart shown in FIG. That is, a person who intends to run the bicycle 1 checks the longitude and latitude of the starting point and the target point using a map or the like before starting the running, and determines the longitude and latitude of the starting point and the destination checked. Accordingly, the longitude input key 9 and the latitude input key are operated. As a result, the longitude and latitude of the starting point and the destination are input (S1). Next, the longitude and latitude of the input starting point and destination, and the direction sensor 2
The direction of the destination at the departure point is calculated based on the direction constantly detected by 7. Then, the calculated orientation is stored in the register 26j and displayed on the display unit 8.

After that, until the START key 11 is operated, the loop of S1 to S4 is repeated to wait for S.
The travel data is calculated when the TART key 11 is operated (S5). That is, when the front wheel 2 rotates and the magnet 4 passes inside the transmitter 6, the reed switch 13 provided in the transmitter 6 is turned on, and the reed switch signal a is generated as shown in FIG. To be done. Then, the oscillation circuit 15 outputs the clock signal b of a predetermined cycle, and the transistor 19 repeats on / off for a minute time. As a result, the resonance pulse c is output from the electromagnetic induction coil 21 of the transmitter 6 in a short time immediately after the magnet 4 has passed.

The electromagnetic induction coil 21 on the transmitter 6 side
When a resonance pulse (electromagnetic induction signal) is output from the electromagnetic induction coil, the electromagnetic induction coil provided in the reception unit 24 generates a reception signal by an electromagnetic induction action. Therefore, the received signal is generated when the front wheel 2 makes one rotation and the magnet 4 passes inside the transmitter 6, that is, every time the front wheel 2 makes one rotation.
5, and the CPU 25 counts this received signal. Then, the speed (hour speed) is calculated from "(3600 / count cycle) x circumference" and "total count x
The total distance is calculated by "circumference". Further, after storing the calculated speed and the integrated distance (S6), the traveling data including the stored traveling distance and speed is displayed (S6).
7). Subsequently, it is determined whether a fixed time has passed (S8), and the loop of S5 to S8 is repeated until the fixed time has passed. Therefore, during this period, the traveling speed of the bicycle 1 and the accumulated distance are sequentially calculated and displayed.

Then, after a lapse of a certain time, the bearing is measured at the time when the certain time has passed (S9), and the longitude and latitude at the time of the movement are calculated from the distance and the azimuth continuously advanced in the certain time. To do. That is, since the azimuth is measured at regular intervals in S9, the moving azimuth can be obtained from the azimuth measured last time and the azimuth measured this time.
Since the traveling data is stored in 6, it is possible to obtain the distance traveled within a certain time from the previous point. Moreover, since the longitude and latitude of the departure point are stored in advance, the longitude and latitude of each point at a fixed time can be calculated from the departure point as a starting point and the traveling direction at a fixed time and the distance traveled at a fixed time. Can be calculated. Then, after the opening degree and the latitude of the current moving point are calculated at regular time intervals in this way, in the next step S11, the direction of the destination at the current moving point is calculated.

That is, since the longitude and latitude of the current moving point are calculated in the previous S10, and the longitude and latitude of the destination are input in S1, the two are compared by comparing the two. The bearing is calculated, and the calculated bearing of the destination is stored in the register 26i of the RAM 26 (S1).
2). Thereafter, it is determined whether or not the direction of the destination at the current movement point stored in S12 has changed by 90 ° or more from the direction of the destination at the starting point stored in S3 in advance (S13). Then, if it has not changed by 90 ° or more, without executing the process of S14,
The direction of the destination at the current movement point stored in S12 is displayed on the display unit 8 (S15). Then, it is determined whether or not the END key 12 has been operated (S16), and the loop of S5 to S16 is repeated until the END key 12 is operated. Therefore, by repeating this loop, the azimuth of the target point at the current movement point is displayed on the display unit 8 every time a fixed time elapses. Therefore, by traveling in the direction according to this azimuth, The point can be easily reached.

However, when the determination of S13 is made, if the direction of the destination at the current movement point has changed by 90 ° or more with respect to the direction of the destination at the departure point stored in advance in S3, Can be assumed to have passed. Therefore, in such a case, the destination passing display is displayed on the display unit 8 (S14), and the fact is notified. In addition, in this embodiment, the destination passage is displayed on the display unit 8, but the destination passage may be notified by sounding.

[0018]

As described above, according to the present invention, since the direction of the destination at the current position is displayed,
By moving while visually recognizing this display, it becomes possible to easily and smoothly reach the destination.

[Brief description of drawings]

FIG. 1 is a side view of a bicycle to which an embodiment of the present invention is applied.

FIG. 2 is an external front view of the transmitter and the receiver according to the embodiment.

FIG. 3 is a circuit diagram showing a configuration of a transmitter.

FIG. 4 is a block diagram showing a configuration of a receiver.

FIG. 5 is a diagram showing a memory configuration of a RAM.

FIG. 6 is a flowchart showing the operation of the embodiment.

[Explanation of symbols]

 1 Bicycle 4 Magnet 6 Transmitter 7 Receiver 8 Display 25 CPU 26 RAM 27 Direction Sensor 29 Key Input Unit

Claims (2)

[Claims] 1. An input unit for inputting a starting point and a longitude and latitude of a destination, a moving direction detecting unit for detecting a moving direction of a moving body which has started moving from the starting point, and a moving distance of the moving body. A moving distance detecting means, a current position calculating means for calculating the longitude and latitude at the current position of the moving body based on the azimuth and the moving distance detected by the detecting means, and the calculating means. An azimuth calculation unit that calculates the azimuth of the destination at the current position based on the calculated longitude and latitude of the current position and the longitude and latitude of the destination, and displays the azimuth calculated by the azimuth calculation unit. A navigation device comprising: a display means. 2. The direction of the destination at the starting point,
It is characterized in that a comparison means for comparing the direction of the destination at the current position calculated by the direction calculation means is further provided, and a notification means is provided for notifying when the positions differ by a predetermined angle or more. The navigation device according to claim 1.