JPS6097486A - Graphic coordinate reading device - Google Patents

Abstract

PURPOSE:To lower cost by magnetizing a graphic prepared using a writing utensile such as ink or a pencil containing a magnetic material having residual magnetism characteristic properly by a magnetizing element and reading by a magnetic reading element. CONSTITUTION:Domains of S, N are magnetized continuously by running a function section 13 on coordinate bases 21, 22 on a drawing 3, and coordinates of all graphics 2 are read basing on this. Then, the drawing 3 is scanned by the function section 13, and magnetic substance of the graphic 2 is magnetized by a magnetizing element 17. Further, magnetism of the magnetic substance is detected by a magnetism reading element 19, and positional coordinate at the time of detection is outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a graphic coordinate reading device for automatically inputting graphic coordinates into a host computer or the like.

[Prior art]

Conventionally, there has been a device that uses a digitizer as shown in FIG. 1 as a graphic coordinate reading device. In Figure 1, ■
is a digitizing board, 3 is a drawing pasted on the digitizing board 1, and a figure 2 is drawn on the drawing 3. 4 shows the coordinates of each point of figure 2 on the host computer 5.
This is a cursor for manual input, and the host computer 5 performs graphic processing.

Next, how to use this conventional device will be explained.

In digitizing with this conventional device, the coordinates of the vertices A, B, C, D, E, F, A of the figure 2, which have been accurately created in advance on the drawing 3, are transferred to the host computer using the cursor 4. Enter.

When the figure 2 becomes more complex, a color-coded drawing is generally created, but in this case, digitization corresponds to this by separating layers for each color, and since the digitization input is done manually, it is easy to color-code the drawing. It can be done every time. However, in this digitizing method, a drawing with positive values is created in advance as described above, and the drawing is input by tracing it, which requires a large amount of work.

As described above, the conventional figure coordinate reading device using the digitizing method shown in Fig. 1 not only requires a large amount of human labor due to the digitizing work, but also tends to make input errors. There are drawbacks that increase rapidly.

In order to overcome these drawbacks, a method of creating drawings directly on graphics, as shown in FIG. 2, has recently come into use. In FIG. 2, 6 is a tablet, 7 is a stylus pen, 8 is graph ink, 9 is the screen of the graphic 8, and 10 is an input created using the stylus pen 7 on the tablet 6 while looking at the screen 9 of the graphic 8. 11 is the figure 1
This is a keyboard for inputting the coordinates into the host computer 5 after confirming that 0 is correct, and the host computer 5 performs necessary graphic processing.

In the conventional device shown in FIG. 2, the coordinate values, etc. are input into the host computer 5 at the time the drawing is created on the graph ink 8, so digitizing input is no longer necessary, and therefore, the time required for inputting coordinates is reduced. can be reduced.

Although the figure coordinate reading device using the graphic 8 shown in Figure 2 is highly improved in terms of reducing manual labor, the graph ink device itself is extremely expensive, making it difficult to put it into practical use in many cases due to cost. There were drawbacks such as.

[Summary of the invention]

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional ones, and it uses a magnetizing element to appropriately draw figures created using ink containing a magnetic material having residual magnetic properties or a writing instrument such as a pencil. It is an object of the present invention to provide a figure coordinate reading device that can accurately and easily read the position coordinates of a figure without increasing costs by magnetizing the figure and reading it with a magnetic reading element.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

Figure 3+al, (bl shows one embodiment of the present invention, in Figure 3(al), 12 is a stand for attaching or fixing the drawing 3, and the drawing 3 has a magnetic material having residual magnetic properties. A figure 2 is drawn using a writing instrument such as an ink containing a body or a pencil. 13 is a functional part in which a magnetizing element, a demagnetizing element, and a magnetic reading element are incorporated, and the kneader can be moved along a drive shaft 14. , and this drive shaft 14 is connected to its holder 15
It is movable along the guide 16 by. 21 and 22 are coordinate standards made of magnetic material on the drawing 3.

FIG. 3 shows the functional unit 13 viewed from the drawing 3 side (in bl,
17 is a magnetizing element for magnetizing the magnetic material of figure 2, 18
is a demagnetizing element for demagnetizing the magnetized magnetic material, 19
is a magnetic reading element that detects the magnetism of the magnetized magnetic body and outputs the position coordinates at the time of the detection.

FIG. 4 shows the B-H hysteresis characteristic of a magnetic material capable of retaining residual magnetism contained in the ink or pencil used to draw figure 2 in FIG. 3. In the figure, B indicates the magnetic flux density, H indicates the magnetic field, a hysteresis curve 30 is a characteristic of a magnetic material with a small remanence, and a hysteresis curve 31 is a characteristic of a magnetic material with a large remanence.

Next, the operation will be explained.

In FIG. 3 fat, first, the coordinate reference 21 on FIG.
．． By running the functional section 13 over 22, S
, N domains are continuously magnetized, and the coordinates of all figures 2 are read using this as a reference.

Note that the coordinate references 21 and 22 may be created in the shape of broken lines and magnetized.

Next, the drawing 3 is scanned by the functional unit 13 to magnetize the magnetic body of the figure 2 by the magnetizing element 17, and then the magnetic reading element 19
detects the magnetism of the magnetic material, and outputs the position coordinates at the time of the detection.

By the way, when a drawing becomes complex and has multiple layers, that is, when a figure is drawn on top of another figure, it is necessary to read the position coordinates for each layer.

When reading the coordinates of a figure expressed in two layers in this way, use a writing instrument containing a magnetic material having the hysteresis curve 30 for the first Wj figure in FIG. 4, and use the hysteresis curve 3 for the second layer
Draw with a writing instrument containing the magnetic material No. 1. First, the figure is magnetized with a magnetic field strength that saturates the magnetic body of the hysteresis curve 31, and all position coordinates are read. Then, the demagnetizing element 1B is set so that the residual magnetism of the magnetic body of the hysteresis curve 30 becomes 0. If the magnetization is erased using the magnet, and the position coordinates of the figure are read again and the difference between the two is calculated, the data that disappeared among the first detected coordinates will be the data of the hysteresis curve 30, and in this way, the two figures can be distinguished. It is possible,
By using this method, it becomes possible to identify multilayer figures.

In this way, in the device of this embodiment, after magnetizing the magnetic material of the figure, the position coordinates of each point of the figure are output at the time when the magnetism of the magnetic material at each point of the figure is detected, which eliminates the high cost. The figure coordinates can be read very easily and accurately without becoming erroneous. Furthermore, by using the difference in hysteresis of the magnetic materials, it is possible to automatically read the positional coordinates of figures expressed in multiple layers, which is extremely effective in automatically reading the coordinates of complex drawings.

In the above embodiment, the case where the drawing was fixed on a flanto-beso type stand was described, but there is no difference in the case where it is fixed on a drum quib stand. Furthermore, since it is more efficient to read several bits at a time in parallel for the functional part, it goes without saying that it is preferable to process this with as many bits as the computer processing allows.

〔Effect of the invention〕

As described above, according to the figure coordinate reading device according to the present invention, a figure on a drawing drawn using ink or the like containing a magnetic material having residual magnetic properties is magnetized by a magnetizing element,
Since the magnetic reading element reads the coordinates of each point on the figure, it is possible to automatically read the figure coordinates easily and accurately without increasing the cost.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional digital quiz type figure coordinate reading device, FIG. 2 is a block diagram of a conventional digital quiz type figure coordinate reading device, and FIG. 3 is an embodiment of the present invention. t# perspective view of the figure coordinate reading device, 3rd
Fig. tb> is a bottom view of the functional part thereof, and a B-H hysteresis characteristic diagram of a magnetic material having different residual magnetic characteristics from Fig. 4C. 2... Figure, 3... Drawing, 17... Magnetizing element, 1
9...Magnetic reading element. In the figures, the same reference numerals indicate corresponding parts. J-0 Agent Masuo Hitoiwa Figure 1 2 Figure 2 Figure 3 Figure 4 Hiroshi Seki 2 procedural amendments (voluntary) 1 , Indication of the case 〒, 1. Nisho 58-206530 No. 2, Name of the invention, Geometric coordinate reading device, Representative of the person making the amendment, Representative Katayuni, Department - Agent 5, Statement of the subject of the amendment. Claims column, Detailed description of the invention column 6, Contents of amendment (11 The claims of the specification are corrected as shown in the attached sheet. (2) "Magnetization" on page 7, line 12 of the specification " is corrected to "magnetism." Claims + 1) A device for reading the coordinates of a figure written by a writing instrument containing a magnetic material having residual magnetic properties, and a drawing in which the figure is written. The magnetizing element that magnetizes the magnetic material of the shape by scanning the top is cleared (Ura-magnetic Jd≧1,
A figure coordinate reading device characterized by comprising: a magnetic reading element that scans the drawing and detects the positional coordinates of each point of the magnetized figure when it comes to the point. (2) The magnetization element magnetizes each figure drawn by a writing instrument containing magnetic substances having different residual magnetic properties with different magnetic flux densities, and the magnetic reading element
2. The figure coordinate reading device according to claim 1, wherein when the element comes over each point of each figure, the position coordinates of each point are detected for each of the magnetic flux densities.

Claims (1)

[Scope of Claims] (Jl A device for reading the coordinates of a figure written with a writing instrument containing a magnetic material having residual magnetic properties, which scans a drawing on which the figure is written to detect the coordinates of the figure. A figure characterized by comprising a magnetizing element that magnetizes a magnetic substance, and a magnetic reading element that scans the drawing and detects the position coordinates of each point when it comes to each point of the magnetized figure. Coordinate reading device. (2) The magnetization element magnetizes each figure drawn by a writing instrument containing a magnetic material having different residual magnetic properties with different magnetic flux densities, and the magnetic reading element
2. The figure coordinate reading device according to claim 1, wherein when the element comes over each point of each figure, the position coordinates of each point are detected for each of the magnetic flux densities.