JPS6142801B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention measures a navigational position using a navigation device such as a Loran receiver, an Omega receiver, or an NNSS receiver, and converts the measured navigational position into an
This invention relates to a track recording device that records on an axis record.

Various devices have been proposed as such track recording devices.

For example, when recording a track with a conventional device, an arbitrary reference point is set on the XY axis recorder,
This reference point is made to correspond to the latitude and longitude of the reference point set on the map. When recording the navigation position, calculate how much the latitude and longitude of the measured navigation position deviate from the latitude and longitude of the reference point, and move the recording pen of the XY axis recorder by the amount of deviation. . In this case, the amount of movement of the recording pen must be determined according to the scale of the map. Therefore, in this type of recording device, before recording a track, the amount of movement of the recording pen must be adjusted in advance so that it corresponds to the scale of the map. Furthermore, if the scale of the map is unknown, the adjustment of the recording pen becomes very complicated, which tends to complicate the handling of the apparatus.

The present invention provides a track recording device that is extremely easy to handle and can record tracks with high precision.

This will be explained below with reference to the embodiments shown in the drawings.

FIG. 1 shows an embodiment of the present invention. In the figure, reference numeral 1 denotes an XY-axis recorder, and a recording pen 2 movable in the XY directions records on a recording paper 3.

The pen position of the recording pen 2 on the recording paper 3 is
A pen position signal is sent from the output terminals Px ₁ and Py ₁ . As the pen position signal, for example, numerical data representing the pen position is output.

An open-loop type XY-axis recorder using a pulse motor is known (Watanabe Sokki Giho, January 1977 issue, P4). In this XY axis recorder, a pulse motor rotates in proportion to the number of input pulses, and a recording pen moves in proportion to the rotation of the pulse motor.
A pulse counter for determining the moving position of the recording pen based on the number of input pulses and a register to which pulses for moving the recording pen to a desired position are input are set. When a difference occurs between the set value of the register and the count value of the pulse counter, the pulse motor rotates with the number of pulses corresponding to the difference to drive the recording pen. Therefore, the output terminal P _x
1 , P _y1 outputs the count value of the pulse counter as a pen position signal. Among the pen position signals, the X position signal of output end Px ₁ is an open/close switch.
It is guided to each of the memory circuits Mx ₀ and Mx ₁ via each of S ₁ and S ₂ . Further, the Y position signal of the output terminal Py ₁ is sent to the memory circuits My ₀ and My ₁ via the open/close switches S ₃ and S ₄ , respectively.
are guided to each of them. Memory circuits M _x0 , M _x1 , M _y0 ,
M _y1 stores numerical data output from the output terminals P _x1 and P _y1 , and for example, a known register can be used. The above open/close switches S ₁ to S ₄
Of these, the on-off switches _S1 and _S3 are interlocked to open and close, and the on-off switches _S2 and _S4 are also interlocked to open and close. Therefore, when the open/close switches _S1 and _S3 are closed in conjunction, an arbitrary pen position of the recording pen 2 is stored in the recording circuits _Mx0 and _My0 . Similarly,
When the open/close switches S ₂ and S ₄ are closed in conjunction, the memory circuits Mx ₁ and My ₁ memorize the pen position.

In the above, the memory circuits Mx ₀ and My ₀ store the position of a predetermined reference point P ₀ (X ₀ , Y ₀ ) on the recording paper 3. Furthermore, the memory circuits Mx ₁ and My ₁ store the positions of other reference points P ₁ (X ₁ , Y ₁ ). This recording operation is performed by moving the recording pen 2 to its respective reference position using the X-axis movement switches 4 and 5. In addition, move the recording pen 2 to each movement switch 4 and 5.
When moving manually by
Switch Sw ₁ and Sw ₂ to the manual side. In the above, the reference point P ₀ (X ₀ , Y ₀ ) is set at the lower left end of the recording paper 3, and the reference point P ₁ (X ₁ , Y ₁ ) is set at the upper right end.

Recording range setting circuits 6 and 7 set the recording range of the navigation position to be recorded. And 6
7 sets the recording range in the latitude direction, and 7 sets the recording range in the longitude direction. When setting the recording range using a map as the recording paper 3, set the reference point P ₀ (X ₀ , Y ₀ ),
The latitude corresponding to P ₁ (X ₁ , Y ₁ ) is set in the setting switches 61 and 62 of the latitude range setting circuit 6, respectively. Also, the setting switch 71 of the longitude range setting circuit 7
and 72 have reference points P ₀ (X ₀ , Y ₀ ), P ₁
The corresponding longitude of (X ₁ , Y ₁ ) is set.

The set latitude of the latitude range setting circuit 6 is sent to the Y position calculation circuit 8, while the set longitude of the longitude range setting circuit 7 is sent to the X position calculation circuit 9.

The storage outputs of the storage circuits My ₀ and My ₁ are also led to the Y position calculation circuit 8, and the storage outputs of the recording circuits Mx ₀ and Mx ₁ are also led to the X position calculation circuit 9.

10 is a navigation device, for example, a Loran receiver, an Omega receiver, or an NNSS receiver, which measures the navigation position. The measurement results are sent to the latitude/longitude conversion circuit 11. The latitude/longitude conversion circuit 11 converts the measured navigation position into latitude and longitude on a map and sends it out. The converted latitude output is sent to the Y position calculation circuit 8, and the longitude output is sent to the X position calculation circuit 9.
sent to.

The X position calculation circuit 9 converts the longitude of the measured navigation position into a position on the X axis of the XY axis recorder 1.

This conversion is performed, for example, as follows. Compare the recording range in the longitude direction set by the longitude range setting circuit 7 with the recording range in the X-axis direction of the XY-axis recorder to calculate the position on the X-axis to which the longitude of the measured navigation position corresponds. . For example, if the recording range in the longitude direction set by the longitude range setting circuit 7 is
135° to 140°, and the longitude of the measured navigation position is
If the moving range of the recording pen 2 of the XY-axis recorder 1 in the X-axis direction is 50 cm at 138 degrees, then the X position calculation circuit 9 calculates the following formula: 50 cm x 138 degrees - 135 degrees / 140 degrees - 135 degrees = 30
cm(1) is calculated, and an output is sent to move the recording pen 2 by 30 cm in the X-axis direction from the reference point _P0 . This movement output is data representing the number of pulses corresponding to the movement distance. The recording pen movement output of the X position calculation circuit 9 is led to the X-axis input terminal PX 2 of the XY-axis recorder 1 via the changeover switch Sw ₁ to move the recording pen ₂ in the X-axis direction.

On the other hand, the Y position calculation circuit 8 similarly calculates the recording range in the latitude direction set by the latitude range setting circuit 6 and the recording range in the Y-axis direction of the XY-axis recorder stored in the memory circuits My ₀ and My ₁ . The position on the Y axis corresponding to the latitude of the measured navigation position is calculated by comparing the positions. In this case, the distance on the map corresponding to the distance traveled by the vehicle in the latitude direction differs depending on the latitude where the vehicle is located. That is, when recording navigation positions using the so-called Mercator projection, the distance on the map increases as the latitude increases. The correction circuit 12 corrects the latitude position on the map according to the latitude of the navigation position when the Y position calculation circuit 8 performs position conversion. This correction value is
Since this is known in the Mercator projection, the corrected value can be calculated.

The conversion output of the Y position calculation circuit 8 obtained as described above is led to the Y-axis input terminal _R12 of the XY-axis recorder 1 via the changeover switch _Sw2 , and moves the recording pen 2 in the Y-axis direction. .

As explained above, according to the present invention, two reference positions are set and memorized on the recording paper, and based on the amount of displacement between the two points, the amount of movement of the recording pen is automatically adjusted in accordance with the scale of the map. It is designed so that it can be processed by calculations. Therefore, there is no need to adjust the amount of movement of the recording pen in accordance with the scale of the map, and even when the scale of the map is unknown, track recording can be performed extremely easily and with high precision.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the invention.

Claims (1)

[Scope of Claims] 1. A navigation device that measures a navigational position, a latitude and longitude conversion circuit that converts the navigational position measured by the navigation device into latitude and longitude on a map, an XY-axis recorder, and the XY-axis. When the recording pen of the recording device is at the predetermined first reference point position on the recording paper, its XY
A first memory circuit that stores the coordinate position P ₀ (X ₀ , Y ₀ );
a second memory circuit that stores the position P ₁ (X ₁ , Y ₁ ) on the XY coordinates; and a latitude and longitude setting device that sets a recording range on the map that includes the navigation position measured by the navigation device. and the latitude and longitude conversion based on the recording range in the latitude direction set in the latitude and longitude setting device and the recording range in the Y-axis direction of the recording pen stored in the first and second storage circuits. a Y position calculation circuit that converts the latitude of the navigation position converted by the circuit to a position on the Y axis of the XY axis recorder; a recording range in the longitude direction set in the latitude and longitude setting device; Based on the X-axis recording range of the memory pen stored in the first and second memory circuits, the longitude of the navigation position converted by the latitude/longitude conversion circuit is converted to the X-axis of the XY-axis recorder. and an X position calculation circuit for converting to the above position, and records the navigation position by causing the recording pen to record the X and Y positions converted by the X position calculation circuit and the Y position calculation circuit. A track recording device featuring: