JPH01209196A - Digitizer plotter device - Google Patents

Abstract

PURPOSE:To perform matching of a digitizer coordinate system and a plotter coordinate system to each other, adjustment of movements and expansive or contractive correction of coordinate planes easily and with high accuracy, by forming a mapping function between the digitizer coordinate system and the plotter coordinate system, converting read coordinate values in the digitizer coordinate system into coordinate values in the plotter coordinate system, and matching the two kinds of the coordinate values to each other. CONSTITUTION:A computer 5 sends instructions to a plotter controller 9 to drive a pen head 8, thereby positioning a coordinate indicator 12 in the pen head 8 to the origin A of a plotter coordinate system, a predetermined coordinate point B on an X-axis and a predetermined coordinate point C on a Y-axis, sends instructions to a coordinate reading signal generator 3 to generate a coordinate reading signal from the indicator 12, and causes a coordinate reading means 4 to read the coordinate values in a digitizer coordinate system for each of the points A-C. Based on the three known coordinate points A, B, C in the plotter coordi nate system and the coordinate values in the digitizer coordinate system, the computer 5 forms a function for mapping from the digitizer coordinate system onto the plotter coordinate system. Coordinate transformation for a designated coordinate value is conducted based on the mapping function, whereby the coordinate system of a digitizer device and that of the plotter device are matched with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a digitizer/plotter device in which a digitizer device and a plotter device are integrated.

[Conventional technology]

In recent years, digitizer devices that read the coordinate values of arbitrary points on a coordinate plane (digitizer coordinate plane) indicated by a coordinate indicator, and devices that move on a coordinate plane (plotter drawing plane) provided over the digitizer coordinate plane, have been developed. Digitizer/plotter devices have come on the market that are integrated with a plotter device capable of plotting arbitrary figures on gauze recording paper on the plotter plotting plane using a pen head.

A conventional device of this type will be explained with reference to FIGS. 4 and 5.

First, by aligning the coordinate indicator 2 with an arbitrary coordinate point on the digitizer coordinate plane 1 and causing the coordinate reading signal generator 3 to generate a coordinate reading signal from the coordinate indicator 2, X in the digitizer coordinate system is determined.

The calculator 5 reads the Y coordinate value via the coordinate reading means 4.

The calculator 5 sends a collection of the arbitrary number of read coordinate values as graphic data to a storage device (not shown) or to another calculator. In addition, the calculator 5 may, if necessary,
A plotting command is sent to the plotter control device 9 based on the read graphic data. As a result, the pen head 8 is driven, the recording pen 7 is driven, and the read figure is plotted on a recording paper 10 pasted on a plotter plotting plane 6 provided overlapping the digitizer coordinate plane 1.

In this way, in the digitizer/plotter device, by providing the plotter drawing plane 6 on the same plane as the digitizer coordinate plane 1, it is possible to create and edit graphic data as if drawing lines with a ruler on a drawing board. You can draw diagrams based on

[Problems to be Solved by the Invention] In such an apparatus, it is desirable that the digitizer coordinate system and plotter coordinate system, which are on the same plane, completely match.

However, due to manufacturing problems, the origins of the digitizer coordinate system and plotter coordinate system may deviate, or the coordinate axes (XD, YD
iXP, YP) are often tilted.

In order to match these, it is necessary to adjust the digitizer coordinate plane 1 or the plotter coordinate plane 6 by appropriately tilting or moving it in parallel, as shown in FIG. 6, and this adjustment work is troublesome. .

Furthermore, if the digitizer coordinate plane 1 is made of a material such as an acrylic board that expands and contracts with temperature and humidity, the digitizer coordinate plane 1 will expand and contract due to changes in the environment in which the digitizer/plotter device is used. There is a problem in that the plotter coordinate plane 6 is shifted from the plotter coordinate plane 6. This problem is solved by fixing the end face of the digitizer coordinate plane 1 as shown in FIG.
) direction expansion/contraction rate (△x/X Standard length in the D direction, Δ
There is an idea to solve this problem by measuring the standard length in the y/YD direction using the measuring device 11 and applying correction using the calculator 5. However, in this method, the expansion/contraction ratio is extremely small, and the accuracy of the measuring device 11 is also low, making it difficult to perform effective correction.

SUMMARY OF THE INVENTION An object of the present invention is to provide a digitizer/plotter device that can perform coordinate axes alignment and movement adjustment between a digitizer coordinate system and a plotter coordinate system, and expansion/contraction correction of a coordinate plane extremely easily and with high precision.

[Means to solve the problem]

The above object is achieved by providing a second coordinate indicator separate from the coordinate indicator of the digitizer device in the pen head of the plotter device, and by using this second coordinate indicator to indicate a predetermined point on the plotter drawing plane. A mapping function is determined by a coordinate conversion means using the given coordinate value of the given point on the digitizer coordinate plane and the coordinate value of the given point on the plotter plotting plane, and the coordinate systems of both the digitizer device and the plotter device are made to match. This is achieved by

[Effect]

When the second coordinate indicator indicates a predetermined point on the plotter drawing plane, usually the origin of the plotter coordinate system and two points on each of the X and Y coordinate axes, the digitizer coordinates of the predetermined point are read from the coordinate value reading means of the digitizer device. The coordinate values on the plane are given to the coordinate transformation means. The coordinate conversion means converts the given coordinate values and
A mapping function between the coordinate systems of the digitizer device and the plotter device is determined using known coordinate values of a predetermined point on the plotter plotting plane, and coordinates are exchanged between the coordinate values subsequently instructed based on this mapping function. , make the coordinate systems of both the digitizer device and plotter device coincide.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram showing an embodiment of the digitizer/plotter device according to the present invention, and FIG. 2 is a side view schematically showing the pen head and its vicinity of the same device.
is a digitizer coordinate plane; 2 is a coordinate indicator for matching an arbitrary point on the digitizer coordinate plane 1 and reading the coordinate value of that point in the digitizer coordinate system; 3 is a coordinate indicator 2 and a second coordinate indicator to be described later. This is a coordinate reading signal generator for generating a coordinate reading signal from a device.

4 is a coordinate indicator 2 at an arbitrary point on the digitizer coordinate plane 1.
5 is a calculator that sends commands to the plotter control device 9 based on the coordinate values of the digitizer coordinate system read by the coordinate value reading means 4; It is. A pen head 8 is driven by a plotter control device 9 and moves in the X and Y axis directions on the plotter coordinate system on a plotter drawing plane 6 which is on the same plane as the digitizer coordinate plane 1. The recording paper 10 is moved up and down by the control device 9 and pasted on the plotter plotting plane 6.
A recording pen 12 is a second coordinate indicator provided in the pen head 8 for recording figures on the recording pen.

Here, when performing the initialization operation of the device of the present invention, the calculator 5 sends a command to the plotter control device 9 to
and move the second coordinate indicator 12 in the pen head 8 to the origin A of the plotter coordinate system shown in FIG. A command is sent to the coordinate reading signal generator 3 according to the coordinate point C, a coordinate reading signal is generated from the second coordinate indicator 12, and the digitizer coordinate system of each point A-C (its X, Y coordinate axes XD, YD The third
The coordinate reading means 4 reads the coordinate values at (shown in the figure). The calculator 5 also calculates A of the known plotter coordinate system,
A mapping function from the digitizer coordinate system to the plotter coordinate system is created using the three coordinate points (coordinate values) B and C and the coordinate values of these points in the digitizer coordinate system.

After the above-mentioned initialization operation, the graphic data of the digitizer coordinate system (collective data of pressure gauge target values) instructed by the coordinate indicator 2, read by the standard reading means 4, and sent to the calculator 5 is processed by the calculator 5 as described above. The coordinate values are converted into coordinate values in the plotter coordinate system based on the mapping function and sent to a storage device (not shown) or another calculator. Calculator 5
However, when drawing a figure on the recording paper 10 affixed to the plotter drawing plane 6, which is on the same plane as the digitizer coordinate plane 1, based on figure data in the digitizer coordinate system, the read figure data is Since the coordinates are converted into coordinate values in the coordinate system, the read point and the plotted point match perfectly.

In the above-described embodiment, a case has been described in which the calculator 5 is equipped with a coordinate conversion means for converting coordinate values of the digitizer coordinate system to coordinate values of the plotter coordinate system, but the present invention is not limited to this.

〔Effect of the invention〕

As described above, according to the present invention, a mapping function is created between the digitizer coordinate system and the plotter coordinate system, and based on this, the read coordinate values of the digitizer coordinate system are converted to the coordinate values of the plotter coordinate system, By aligning the two zatane threads, it is possible to align the coordinate axes of the digitizer coordinate system and the plotter coordinate system, adjust movement, and correct expansion and contraction of the coordinate plane with great ease and precision. It is possible to match the points plotted by the plotter device with extremely high accuracy.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an embodiment of the device of the present invention, FIG. 2 is a side view schematically showing the pen head portion of the same device, and FIG. 3 is a diagram showing the positional relationship between the digitizer coordinate system and the plotter coordinate system. Fig. 4 is a configuration diagram of a conventional device, Fig. 5 is a side view schematically showing the pen head portion of the same device, and Figs. 6 and 7 explain a method of matching the conventional digitizer coordinate system and plotter coordinate system. This is a diagram for 1... Digitizer coordinate plane, 2... Coordinate indicator, 3
...Coordinate reading signal generator, 4...Coordinate value reading means,
5... Calculator, 6... Plotter drawing plane, 7...
Recording pen, 8... Pen head, 9... Plotter control device, 10... Recording paper, 12... Second coordinate indicator. Patent Applicant Hitachi Seiko Co., Ltd. Agent Patent Attorney Tadashi Akimoto One person other than the actual person ■ 〒 961

Claims (1)

[Claims] 1. A digitizer device that reads the coordinate values of an arbitrary point on a coordinate plane (digital coordinate plane) indicated by a coordinate indicator;
A digitizer integrated with a plotter device capable of plotting arbitrary figures on recording paper on the plotter plotting plane with a pen head that moves on a plotting plane (plotter plotting plane) provided over the digitizer coordinate plane. - In the plotter device, a second coordinate indicator separate from the coordinate indicator is provided on the pen head, and the second coordinate indicator is used to indicate a predetermined point on the plotter drawing plane. A mapping function between the coordinate systems of the digitizer device and the plotter device is determined using the coordinate values of the predetermined point on the digitizer coordinate plane and the coordinate values of the predetermined point on the plotter drawing plane, and 1. A digitizer/plotter device comprising: coordinate conversion means for performing coordinate conversion of coordinate values subsequently instructed based on the coordinates of the digitizer device and the plotter device to match the coordinate systems of the digitizer device and the plotter device.