JPS6365311A - Proceeding direction indicating device - Google Patents

Abstract

PURPOSE:To inform the deviation of the direction by producing a sound in case one's proceeding direction is deviated by obtaining directional data from a terrestrial magnetism sensor to store the data and calculating the quantity of deviation between the proceeding directional data from a storage circuit and the present proceeding direction. CONSTITUTION:The terrestrial magnetism sensor 3 outputs a sensor signal Ps by a driving signal Pd and the signal Ps is detected by a detection circuit 4 and the data Dk are outputted. An arithmetic circuit 5 inputs the data Dk and outputs the directional data Dh. A decoder driver 6 inputs the data Dh and outputs the north display data Dy and turns on the light of one of north display segments 7a of a display panel 7 and indicates the north direction. Next, when a switch 11 is turned from ON to OFF, a latch circuit 13 latches the data Dh and continues to output these as the proceeding directional data Da. Here, when the direction of the titled device is changed, the data Dh from the circuit 5 are changed. Then, a substraction circuit 14 produces a difference between the inputted data Dh and data Da and outputs it as the quantity Dr of deviation. When the quantity Dr of deviation exceeds the prescribed quantity of deviation, the sound is produced from a speaker to inform that the proceeding direction is deviated from the proceeding directional data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a direction indicating device that utilizes earth's magnetism.

[Conventional technology]

When traveling, orienteering, etc., there are times when it is desired to go straight in a fixed direction in areas where there are no roads or targets, such as Q, JQ, deserts, etc. In cases like this, conventionally I carried a compass H1 (magnetic compass), used to know the north direction, and then marked the direction in which I was heading.

[Problem that the invention seeks to solve]

As mentioned above, in the past, people used a compass to find the north direction, and then determined their direction from this.

However, humans have a tendency to turn to the right or left even when they try to walk straight, and it is impossible to walk straight in areas where there are no targets. For this reason, I often have to take out my compass and check the direction I'm going while walking, but in order to check the direction I'm going, I first need to find the north direction, and then...
Judgments must be made based on this, which is very troublesome. Another problem was that in grasslands, etc., you had to use both hands to move through the grass, and because you couldn't take your hands off you, you would forget to check the direction of travel, and by the time you realized it, the direction of travel had shifted considerably. . SUMMARY OF THE INVENTION An object of the present invention is to provide a traveling direction indicating device which, once the direction of travel is set, allows the user to know by an audible alarm if the direction of travel deviates from then on.

[Means for solving problems]

In order to achieve the above object, the present invention has the following configuration.

That is, the traveling direction indicating device according to the present invention includes a geomagnetic sensor, a drive circuit that drives the geomagnetic sensor, a timing signal generation circuit that generates a drive timing signal for operating the drive circuit, and an output from the geomagnetic sensor. an arithmetic circuit that calculates an output signal from the detection circuit and outputs azimuth data; and a storage circuit that stores the azimuth data from the arithmetic circuit and outputs the stored contents as traveling direction data. a setting timing signal generation circuit that generates a setting timing signal for setting and storing the azimuth data in the storage circuit; A deviation amount calculation circuit that calculates the amount of deviation in the traveling direction and outputs it as deviation amount data, and a deviation amount calculation circuit that detects that the value of the deviation amount data from the deviation amount calculation circuit is outside a certain range and outputs a deviation detection signal. a sounding circuit controlled by a deviation detection signal from the deviation amount detection circuit; and a sounding member driven by the sounding circuit; The feature is that when the direction of travel deviates outside a certain range from the time of occurrence, a warning sound is used to notify the user.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 is a block diagram of a direction indicating device showing an embodiment of the present invention. 1 is a timing signal generation circuit;
The drive timing signal P7, the calculation timing signal ``2'', and the subtraction timing signal P3 are periodically output as shown in FIG. 3. 2 receives the drive timing signal P from the timing signal generation circuit 1 as input, a drive circuit that generates a drive signal Pd synchronized with the drive timing signal P1; 3;
is a geomagnetic sensor that is driven by a drive signal Pd from the drive circuit 2 and outputs a sensor output signal Ps corresponding to the geomagnetism it senses.

4 is a detection circuit, which is composed of an amplifier circuit 4a and an A/D converter 4b, and the sensor output signal Ps inputted from the geomagnetic sensor 6 is amplified by the amplifier circuit 4a, and further amplified by the A/D converter 4b. The detected data Dk is converted into digital data and output. 5 is an arithmetic circuit that inputs the detection data Dk from the detection circuit 4, performs arithmetic operations in synchronization with the arithmetic timing signal P2 from the timing signal generation circuit 1, and outputs the resultant azimuth data Dh; 6 is an arithmetic operation circuit; This is a decoder/driver that receives the azimuth data Dh from the circuit 5 and outputs the north display data Dy. Reference numeral 7 denotes a display panel which is a display member composed of liquid crystal cells, and the display panel 7 has two north display segments 7a each having 60 pieces at 6 degree intervals on the circumference.
, deviation display segment) 7b (only one of each in a lit state is illustrated) and a traveling direction marker y70 for indicating the direction of travel, and the north display data input from the decoder/driver 6. The ratio display segment) 7a is selectively turned on corresponding to Dy. 10 is a traveling direction detection circuit, which includes a switch 11, a switch circuit 12,
Latch circuit 16, subtraction circuit 14, decoder driver 1
5. Consists of a deviation amount detection circuit 16. The switch circuit 12 is a setting timing signal generation circuit, which outputs the setting timing signal Pt from the terminal Q only when the switch 11 is ON, and stops outputting the setting timing signal Pi when the switch 11 is OFF. The latch circuit 16 is a memory circuit, and the switch circuit 12
While the setting timing signal P t is being input to the terminal φ, the azimuth data Dh input from the terminal RI is output as is from the terminal Q, and the setting timing signal p
When t stops, the direction data Dh at the time of the stop
is launched and outputted from terminal Q as traveling direction data Da. The subtraction circuit 14 is a deviation calculation circuit, and when the subtraction timing signal P3 generated from the timing signal generation circuit 1 is input to the terminal φ, the value of the azimuth data Dr input to the terminal ■1 at that time is calculated from the terminal ■ 2, and outputs the subtracted value from terminal O as shift amount data Dr. The decoder/driver 15 inputs the deviation amount data Dr from the subtraction circuit 14 and outputs deviation display data Db, and the display panel 7 selectively selects the deviation display segment) 7b corresponding to the deviation display data ])b. lights up. The deviation amount detection circuit 16 inputs the deviation amount data Dr from the subtraction circuit 14 to the terminal (2), detects that the value of the deviation amount data Dr is not 0, and outputs a deviation detection signal Dx from the 7-terminal O. Reference numeral 20 denotes a sound alarm circuit, and when the shift detection signal Dx is inputted from the shift amount detection circuit 16, the speaker 21, which is the sound generating section, is driven to generate a sound.

Next, the operation of the traveling direction indicating device having the above configuration will be explained.

The drive circuit 2 outputs a drive signal 1) d in synchronization with the timing signal P generated from the timing signal generation circuit 1,
The geomagnetic sensor 6 is thereby driven. Therefore, the geomagnetic sensor 6 outputs a sensor output signal Ps of 1" every time the drive signal Pd is input. Here, the sensor output signal Ps
Since it is a minute analog 4N signal, it is amplified into an appropriate signal by the amplifier circuit 4a of the detection circuit 4, further converted into digital data by the A/D converter 4b, and outputted as detection data Dk. The calculation circuit 5 inputs the detection data Dk, calculates which direction is north each time the calculation timing signal P2 is supplied, and outputs the result as the direction data Dh. In other words, the orientation data D
h is data representing the north direction. Here, as shown in FIG. 3, the calculation timing signal P2 is generated at a timing delayed by a time t from the drive timing signal P1, which is due to the reaction time of the geomagnetic sensor 6 and the A/D converter 4b. This is a time difference that takes into account the operating time of . The decoder/driver 6 inputs the direction data Dh from the arithmetic circuit 5 and outputs the ratio display data Dy, so that one of the 60 north display segments (7a) arranged on the display panel 7 corresponds to the north direction. Light up one segment to point north.

North display segment with 7060 display panels)
In 7a, the segment arranged at the same position as the traveling direction marker 7C corresponds to 0 of the azimuth data Dh, and from this position, each segment in the clock layer corresponds to 59 of the azimuth data I) h. There is.

Next, the operation of the traveling direction detection circuit 10, which is important in this embodiment, will be explained. In addition, the case when the switch 11 is ON and the case when the switch 11 is OI''F will be explained respectively.

First, the case when the switch 11 is ON will be explained.

Since the switch 11 is ON, the setting timing signal ■ゝt is generated from the switch circuit 12, and therefore,
The latch circuit 16 is manually operated from the terminal Q and outputs traveling direction data]) a (numerical data from 0 to 59). The energy reduction circuit 14 reduces the energy of the heading data 1) inputted to the terminal 11 and the traveling direction data I)a inputted from the terminal 2 to the terminal 2, and outputs it as deviation amount data Dr. Here, the traveling direction data Da is the azimuth data I
) If the subtracted value is negative and is larger than h, add 60 to this value.
The added value is output as the deviation amount data Dr. Therefore, the timing at which the subtraction circuit 14 performs subtraction is performed in synchronization with the subtraction timing signal P3 from the timing signal generation circuit 1, but the subtraction timing signal P3 is synchronized with the calculation timing signal as shown in FIG. This occurs at a timing delayed by time t2 from P2, and this is a time difference that takes into consideration the calculation time of the calculation circuit 5. Here, since the values of the traveling direction data Da and the azimuth data Dh are the same, the value of the deviation amount data Dr is 0. decoder·
The driver 15 receives the deviation amount data D from the subtraction circuit 14.
r is input, deviation display data Db is outputted, and one of the 60 deviation display segments (7b) arranged on the display panel 7 is lit to indicate the direction of deviation. Here, the deviation amount data Dr is numerical data from 0 to 59,
In the 60 deviation display segments (60 deviation display segments) 7b of the display panel 7, the segment arranged at the same position as the traveling direction mark 7c corresponds to O of the deviation amount data Dr, and each segment clockwise from this position shows the deviation. It corresponds to quantity data Dr up to 59. Now, the deviation amount data Dr
Since is 0, only the segments arranged at the same position as the self-progressing direction mark 7c of the deviation display segment 7b are lit. On the other hand, since the deviation amount data Dr is 0, the deviation detection signal Dx is not output from the deviation amount detection circuit 16, so the sound alarm circuit 20 does not operate and the speaker 21
does not make a warning sound.

Next, the case when the switch 11 is OFF will be explained.

When the switch 11 is turned from ON to OFF, the setting timing signal pt generated from the switch circuit 12 stops, and at this time, the latch circuit 16 latches the direction data Dh that was input to the terminal Q and moves forward from the terminal Q. Direction data Da
It continues to be output as .

Therefore, the traveling direction data Da is azimuth data Dh representing the north azimuth when the switch 11 is turned from ON to OFF. Here, when the orientation of the azimuth indicating device according to this embodiment is changed, the north direction seen from the azimuth indicating device is changed, so the azimuth data Dh from the performance circuit 5 changes.

Then, the azimuth data D input to the subtraction circuit 14
There is a difference between h and the traveling direction data Da, and the difference is output from the subtraction circuit 14 as the deviation amount data Dr. For example, if the value of the traveling direction data Da is 10 and the value of the azimuth data DhO is also 10, the display panel 7
The north display segment 7a lights up in the 2 o'clock direction (assuming the direction of the traveling direction mark 7c is the 12 o'clock direction), while the shift display segment 7b lights up in the 12 o'clock direction, so that the north direction is the 2 o'clock direction. The traveling direction is the 12 o'clock direction, that is, the direction of the traveling direction mark 7c, indicating that the vehicle is traveling in the correct direction. Here, if the azimuth indicator is shifted counterclockwise by 120 degrees, the north direction becomes the 6 o'clock direction as seen from the azimuth indicator, so the azimuth data Dh becomes 30. However, the direction of travel was different. Therefore, the north display segment 7a of the display panel 7 lights up in the 6 o'clock direction, and the deviation display segment 7b lights up in the 4 o'clock direction, indicating that the original direction of travel is 120 degrees off from the clock wing. . Further, the deviation amount detector 16 from the subtraction circuit 14 outputs a deviation detection signal Dx. Therefore, the sound signal circuit 20 is connected to the speaker 21.
The vehicle is driven to make an audible sound to notify that the direction of travel has deviated.

This value corresponds to the deviation display segments 7b arranged in 6° increments, so the deviation amount data Dr is O which means that the direction of movement is within a range of ±3° with respect to the direction in which it should move. Indicates that

Therefore, the deviation amount detection circuit 16 detects that the direction of movement is deviated from the direction in which the vehicle should travel by ±3° and 3°, and outputs the deviation detection signal Dx.

Next, actual usage will be explained.

FIG. 2 shows an external view of the traveling direction indicating device according to the present invention, FIG. 2(a) is a plan view, and FIG. 2(b) is a side view. In FIG. 2, the same elements as in FIG. 1 are given the same numbers and their explanations will be omitted. In FIG. 2, different parts from FIG. 1 will be explained. Reference numeral 20 is a case of the traveling direction indicating device according to the present embodiment, and reference numeral 21 is a hook for fixing by hooking on a belt or the like.

First, the user hooks and fixes the hook onto the front part of the belt of his pants. Then, the display panel 7 is turned upward so that the user can easily see it, and the traveling direction marker 7C indicates the front direction of the user, that is, the direction in which the user is traveling.

Next, when the user presses the switch 11, the north display segment 7a always indicates the north direction, and the offset display segment 7b indicates the 12 o'clock direction, that is, the direction of the user. (At this point, the amount of deviation data Dr is O.) In this state, the user turns his body so that the direction of travel mark 7C faces the direction he should travel while looking north at north display segment 7a. Turn it to determine its direction. Therefore, when the switch 11 is released, the deviation display segment 7b continues to indicate the direction of travel determined by the user, so the user must proceed so that the deviation display segment 7b continues to indicate the direction of the travel direction mark 7c. Good.

In addition, even if the user does not always look at the deviation display segment 7b, if the user's direction of travel deviates, a sound is emitted from the speaker to notify the user, and the direction indicated by the deviation display segment 7b also changes. Since it deviates from the direction mark 7c, the user only has to look at it and correct the direction of travel.

In this embodiment, the deviation amount detection circuit 16 is the same as the subtraction circuit 1.
Amount of deviation data from 4 I) It was explained that r is not 0 (detects deviation of ±3° or more), but detection is not limited to 0, but can be set within a certain range as necessary. I can do things. For example, this is ±9°
It will be detected with a width of .

〔Effect of the invention〕

As detailed above, according to the present invention, when going straight in an area with no landmarks, there is no need to find the north direction each time to confirm the direction in which you are going, and then make a decision based on this. Even without doing any work, once you set the direction in which you are going, you will be notified by an audible signal if your direction deviates from that point, and you can judge your direction at a glance by the display, making it easier to travel. It has the benefits of a dog, such as being able to enjoy and accurately perform orienteering.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the direction indicating device according to the present invention, and FIG. 2 shows the external appearance of the direction indicating device according to the present invention, FIG. 2(a) is a plan view, and FIG. 2(b) is a side view. , FIG. 3 is a time chart for explaining the operation. 10... Traveling direction detection circuit, 12... Switch circuit, 13... Launch circuit, 14... Subtraction circuit, 16... Misalignment quantity detection circuit, 20... alarm circuit,

Claims (1)

[Claims] A geomagnetic sensor, a drive circuit that drives the geomagnetic sensor, a timing signal generation circuit that generates a drive timing signal for operating the drive circuit, a detection circuit that detects an output from the geomagnetic sensor, and the detection circuit. an arithmetic circuit that calculates an output signal from the arithmetic circuit and outputs azimuth data; a memory circuit that stores the azimuth data from the arithmetic circuit and outputs the stored content as traveling direction data; and sets the azimuth data in the memory circuit. A setting timing signal generation circuit that generates a setting timing signal for storing, and azimuth data from the arithmetic circuit and traveling direction data from the storage circuit are input, and the amount of deviation from the set traveling direction is calculated and the deviation is calculated. a deviation amount calculation circuit that outputs as quantity data, a deviation amount detection circuit that detects that the value of the deviation amount data from the deviation amount calculation circuit is outside a certain range and outputs a deviation detection signal, and the deviation amount. A sound alarm circuit controlled by a deviation detection signal from the detection circuit and a sound generating member driven by the sound alarm circuit are provided, and the traveling direction is outside a certain range from the time when the setting timing signal is generated from the setting timing signal generation circuit. A traveling direction indicating device that is characterized by notifying you with a sound when the direction is off.