JPS5931199A - Method of displaying quantity of straightedge moved in universal parallel rule device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of displaying the amount of movement of a straight edge in a universal parallel ruler device, and involves latching the output data of a counter at a fixed time interval, for example, every second, and displaying the latched data on a display. This feature is characterized in that the lowest A row of the display device does not change at high speed in this way.

A flexible parallel ruler device (in this device, the amount of movement of the straightedge along the XY coordinate axes or the amount of rotation of the straightedge is converted into a pulse signal by an XY pulse encoder, this pulse signal is counted by a counter, and the contents of this counter are A device has been developed that displays digitally on a display.By looking at the display, the operator can move the straightedge to a predetermined distance from a predetermined position or at a predetermined angle. However, the contents of the counter that counts the amount of movement or rotation of the straightedge change depending on the speed at which the straightedge is moved, so if the straightedge is moved faster than a certain point, the display will change. When the displayed numerical value of Cζlowest) Vj changed rapidly, it became impossible to read it, and it was not possible to quickly align the straightedge to a predetermined position.

An object of the present invention is to eliminate the above-mentioned defects by making it possible to easily read the amount of movement of a straight edge during movement.

The configuration of the present invention will be explained below with reference to the accompanying drawings.

Reference numeral 2 denotes a drawing board, to which an X rail 4 is fixed, and the upper end of a Y rail 6 is connected to an X cursor (not shown) movably attached to the X rail 4. The movement of the X cursor along the X1 knob 4 is configured to be converted into a directional pulse signal by a commercially available X pulse encoder 8 (see FIG. 2). 1o is a Y cursor movably attached to the Y rail 6, and a head 12 is attached to the Y cursor 10 via a hinge mechanism.
A transparent index plate 16 is removably attached to the ruler attachment plate 14 of the head 12. The movement of the Y cursor lo along the Y rail 6 is configured to be converted into a directional pulse signal by a commercially available Y pulse encoder 18 (see FIG. 2).

The rotational movement of the ruler mounting plate 14 is configured to be converted into a pulse signal by a known I-pulse encoder 20 built into the head 12. As shown in FIG. 2, the x, y, pulse encoders 8, 10 include xY counters 24, 26 of a data processing controller 22, a Schmitt circuit 28, a pulse quadrupler, a direction determining circuit 30, 32, and a flip-flop circuit 34, 36. are connected via.

The data processing controller 22 has % CPU 38, R
OM 40% system control circuit 42, dynamic RAM 44, input/output interface 46,
A microcomputer whose main components are a printer controller 48, a printer 50, a display controller 52, a display 54, and a keyboard 56 is built-in. In the figure, 58, 60, 62, 64. Chi Aoi is a decoder,
68 is an oscillation circuit, 70 is a frequency divider circuit, 72 is a changeover switch, 74.76 is a latch circuit, 78 is a buffer, 80 is a reset circuit, 82 is a multiplexer, 84 is an interrupt controller, 86 is a parity check circuit, 88 is a communication 90 is an interface, 92 is a keyboard interface, 94 is a bus driver, 96 is a static RAM, and 98 is a multiplexer.

Programs such as XY coordinate value display, xY coordinate value data output, radius calculation, area calculation, centroid calculation, angle measurement, scale setting, and unit setting are written in the ROM 40.

The display controller 52 has a built-in latch register, and when a trigger pulse is input from the input/output interface 46 to the control terminal 52a, the input signal is latched and output to the display 54.

In this embodiment, the trigger pulse is
38 is set to be input to the control terminal 52a of the display controller 52 via the input/output interface 46.

＼ FIG. 3 shows a data processing circuit that processes the output of the θ pulse encoder 20, which includes a Schmitt circuit 100, a pulse quadrupling/direction discrimination circuit 102, a direction conversion circuit 104, a zero detection circuit 106, and so on. The θ Curran 91081 display controller 10 and the pulse oscillator 112 are integrated into the head 1.
Built in 2.

A display 114 is attached to the top surface of the head 12.

The display controller 10 has a built-in latch register, and when a trigger pulse is input from the pulse oscillator 112 to the control terminal 110a, it latches the input data from the a counter 108 at that time, and transfers the latched data to the display 114. is configured to output to . In this embodiment, the trigger pulse is supplied from the pulse oscillator 112 every second.

Next, the operation of this embodiment will be explained.

First, the mode of the computer is selected to display XY coordinate values by operating keys on the keyboard 56. Since the index plate 16 is for using the universal parallel ruler device as a coordinate reader, the lotus index plate 16 is attached to the ruler mounting plate 14.
and attach the straight edge to the ruler mounting plate 14. When the head 12 is moved by manual excitation in a plane parallel to the two surfaces of the drawing board, the XY cursor moves along the XY rail 4.6, and the xY pulse encoders 8 and 18 output directional pulses. . These pulses are Schmitt circuit 2
8. The pulse is supplied to an XY counter 24.26 via a quadruple direction discrimination circuit 30.32 and a flip-flop circuit 34.36, and the xy counters 24 and 26 count the pulses. According to the program in the ROM 40, the CPU 38 transfers the contents of the XY counters 24 and 26 to the latch circuit 74.
76, and this imported xY counter 2
4,26 count data in dynamic RAM 44
Input is provided to display controller 52 via human output interface 46 . On the other hand, a trigger pulse is input to the split terminal 52a of the display controller 52 at one second intervals.

The display controller 52 latches the count data of the xY counters 24 and 26 input at high speed every time a trigger pulse is input, and sends this latched data to the display 54. The display 54 shows the moving speed of the head 12 (
Irrespective of this, the display changes every second and retains the displayed content until it changes, so even if the head 12 is moved quickly, the display on the display 54 during movement, especially the bottom 11 display. can be easily read, and the straight edge can be accurately and quickly positioned, for example, at a distance of lQcm from the reference position in the X coordinate axis direction. Since the output coordinate value data of the interface 46 changes at a high speed, completely independent of changes in display contents, there is no need for unnecessary delay in transferring data to other computers.

On the other hand, when the handle 12a of the head 12 is rotated to rotate the M ruler in a plane parallel to the two surfaces of the drawing board, the P pulse encoder 20 outputs a pulse with directionality, and this pulse is transmitted to the Schmidt circuit 100, the pulse The signal is supplied to the ρ counter 108 via the quadruple direction discrimination circuit 102 and the direction conversion circuit 104, and the ρ counter 108 counts the pulses.

The count data of the θ counter 108 is supplied to a latch register of a display controller 110, and a latch output of this latch register causes a display 114 to display the amount of rotation angle of the straightedge. This display changes every second, and the displayed value is retained until it changes.
The numerical value of the angle during the rotation of the straightedge can be easily read, and the straightedge can be quickly and easily set at an angle of, for example, 30° from the reference position.

As described above, the present invention converts the movement of a straight edge into a pulse signal, counts the pulse signal with a counter, and displays the count data of the counter on a display, without displaying the count data of the counter as is. , the display content is changed at regular intervals, the count data of the counter at the time of this change is displayed, and this display is maintained until the next change, so even when the straightedge is moving, the lowest 4 degrees of the display will be displayed. 1j can be easily read, and the positioning work of the straight edge can be performed quickly and easily.

[Brief explanation of drawings]

FIG. 1 is an overall external view of the adjustable gusset ruler device, FIG. 2 is a block circuit diagram of the data processing controller, and FIG. 3 is a block circuit diagram of the data processing circuit. 2...Drawing board 4...X rail 6...
Y rail 8...X pulse encoder 10...
...Y cursor 12...Head 18...
・Y pulse encoder 20... Pulse encoder 22... Data processing controller 24.2
6...xY counter 28...Schmitt circuit 38...C2040...ROM 42
...System control circuit 44...Dynamic RAM 46...Input/output interface 48...Printer controller 50...
...Printer 52...Display controller
54...Display unit 56...Keyboard 1
08...θ counter -10...Display controller 1-roller 112...Pulse oscillator 114...
...Display device patent applicant Ayao Nishijima, patent attorney representing Mutoh Kogyo Co., Ltd.

Claims (1)

[Claims] l. Convert the movement of the straight edge along the drawing surface into a pulse signal, count the pulse signal with a counter, and display the count output of the counter (thereby, when displaying, the display on the display is kept constant) A method for displaying the amount of movement of a straight ruler in a universal parallel ruler, characterized in that the amount of movement of a straight ruler in a universal parallel ruler is switched at intervals of time, the count output of the counter at the time of the switch is displayed on a display, and this display is maintained until the time of the next switch.