JPS6034045B2 - Magnification measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a measuring device, and more particularly to a measuring device suitable for determining the magnification of two measured dimensions.

In the field of printing technology, the task of measuring the magnification of an arbitrary image and an image similar to this image is frequently performed.
For example, in the photoengraving process that precedes printing, the image of the manuscript is suitably enlarged or reduced in the same space as the original (a film that captures the image to be printed) and the pages of the book that have been printed. A copy of the original is prepared, arranged and pasted with ribs), and is used to calculate the relative magnification of the two images when printing a color-separated original on paper, or when separating a manuscript directly into paper-separated paper. By measuring in advance and setting the measured values in a camera, a film is created that enlarges (reduces) the original to the image size of the original.
This film is then attached to the original printing plate in the same size, and printed on paper at the same size. In the above process, magnification calculations between the original image and the original image are performed frequently because of the large number of originals.In the past, the original and the original image were first scaled on a light table, and then each image was calculated. Dimensions were measured and the values calculated using a calculator, which required a considerable amount of time and effort.

The present invention has been made in view of these points, and it is an object of the present invention to provide a magnification measuring device that can easily determine the magnification between two lateral dimensions.

In order to achieve the above object, the magnification measuring device of the present invention includes an electronic computer that calculates and displays (or records) the magnification, and a fishing length unit that performs side length and inputs the information to the computer. The measuring section of the side length unit is comprised of a scale with black and white line graduations that can be detected optically, and a light ben that scans the graduations of the scale and reads the number of scanned graduations by optical reflection. did.

In other words, multiple objects to be measured (for example, an image original and a block copy)
Apply the scale mentioned above to
A plurality of pieces of length information read by the Light Ben were photoelectrically converted and sequentially input into an electronic computer as electrical signals, so that the mutual multiplier calculation of the measured lengths was immediately performed. This eliminates the need for humans to read the scale and input information into the computer one by one, making it possible to obtain magnification measurement results extremely efficiently. The present invention will be explained in detail below using examples.

FIG. 1 shows an example of a scale used in the magnification measuring device of the present invention, in which a is a plan view and b is a side view. In the figure, 1 is a scale, 2 is a graduation of the scale, 3 is a number attached to the graduation of the scale, and 4 is a guide groove that guides the tip of the Light Ben. FIG. 2 is a schematic cross-sectional view showing an example of a light vane used in the magnification measuring device of the present invention.

In the figure, 5 is a light source, 6 is a light receiving element, and 7 is a bend tip. A switch 8 is composed of contacts 9 and a pressure-sensitive conductive rubber plate 10, and is turned on when pressure is applied to the bend tip (the part of the lens 7).

11 is a connection line to an input/output control section (not shown).

FIG. 3 is a block diagram showing an example of the overall configuration of the magnification measuring device of the present invention.

Broadly divided, the measurement section 12, the control calculation section 13, the display section 14,
It consists of a keyboard 15 and an input/output interface section 16, each of which is connected via a bus line. The control/calculation unit 13 may have a hardware configuration such as a BI and logic dedicated to arithmetic operations, or may have a software configuration using a general-purpose computer and having a control/calculation program. The light ben of the measuring section 12 (see FIGS. 1 and 2) is connected to the input/output interface part 16, and the input/output interface part 16 is connected to the power supply of the light ben, the output signal amplifier of the light receiving element 6, and the output signal of the light receiving element 6. It is equipped with a binarization circuit, etc. The display section 14 displays calculation results using a light emitting diode or liquid crystal, and the input/output interface section includes a latch, a decoder, a driver circuit, etc. for driving the display section with signals from the control/calculation section. The keyboard 15 has numerical keys as well as functions for instructing calculations.
A key (not shown) is provided. The operation of the magnification measuring device of the present invention will be explained below.

Figures 4 a and b are explanatory diagrams of how to operate Light Ben, Figure 5
The figure is an explanatory diagram of the input/output signals in the side length unit, where a shows the photoelectric conversion output of the measurement section (light ben), and b shows the waveform shaping output of the input/output control section.

Place the scale on top of the object to be measured (for example, a manuscript) and place the fourth
A. between the two points you want to measure as shown in Figure a. When a light ben is lowered onto one end of B, for example A, pressure is applied to the pressure-sensitive conductive rubber plate 10 shown in FIG. 2, turning on the switch 8 and starting measurement.

Then, by moving the light ben while it is placed on the scale 1, the black and white line graduations 2 on the scale are optically read, and the light ben is raised at the other end B to complete the measurement. The output of the light ben at this time is as shown in FIG. 5a, and to prevent noise, it is input to a Schmitt trigger circuit with hysteresis provided in the input/output interface section 16 for waveform shaping. That is, the two dotted lines in FIG. 5a indicate the threshold level, at which the output of the light ben is waveform-shaped and binarized to obtain the output waveform (digital signal) shown in FIG. 5b. This is sent to the control/calculation section 13. The control/arithmetic unit 13 is composed of a general-purpose microcomputer and counts the digital signals. That is, the side length information read by the light ben in the measurement unit 12 is immediately processed by the electronic computer,
The results will be shown on the display section 14. As shown in Figure 4b, the method of operating the light ben is that instead of raising the light ben at the other end B that you wish to measure, place that end B in advance at the very end of the scale (reference line) 17.
The switch 8 may be turned off by passing the light ben to the end (reference line) and then raising it.

Before the column length, the method of calculation is specified in advance by pressing the function key attached to the keyboard 15.

For example, if you select a function key that calculates (length measured at the second time) ÷ (length measured at the first time), the length of the original is calculated the first time, and the length of the block is calculated the second time. By measuring, the control/calculation section 13 calculates (length in the original)/(length in the original). Note that it is also possible to use other function keys and input one of the data using the numeric keys. Also, the keyboard 15 excluding the measuring section 12
and display section 14, input/output interface section 16, control/
With only the configuration of the calculation unit 13, it can be used as a general-purpose electronic desk calculator. As explained above, according to the present invention, the side length is set, the scale is placed on the object (manuscript, block copy), and the neck is immediately scanned by scanning the scale graduations with the light ben.

Since it is possible to calculate the magnification of the length or two neck length values, there is no need to calculate the magnification using another calculator as in the past, which greatly simplifies the work of measuring the magnification, which is particularly common in the field of printing technology. You will be able to do it more efficiently. In addition, this device has a separate scale and is completely free of charge, the Light Ben is small and easy to move, and the device itself can be downsized, making it extremely easy to handle. Furthermore, since the keyboard is equipped with numeric keys for inputting numeric data, known numeric values can be entered from the keyboard, while others can be entered from the Asayama-cho unit. Additionally, it can be used as a calculator to perform a wide range of calculations. Note that the scale and light ben used as the measurement unit of the present invention are not limited to those in the above embodiments, and may be of any type as long as the scale graduations can be read, so a light ben etc. for a barcode reader may also be used. It goes without saying that this is possible. However, the scale shown in Fig. 1 has a guide groove 4 for the pen tip, which has the effect of making it easier to run the light ben and reducing noise. Since the switch is configured to turn on only when pressure is applied, it is extremely easy to handle when the length is on the side.

[Brief explanation of the drawing]

The drawings all relate to the magnification measuring device of the present invention.
Fig. 1 shows an example of the scale, a is a plan view, b is a side view, Fig. 2 is a sectional view showing an example of a light vent, Fig. 3 is a block diagram showing an example of the overall configuration, and Fig. 4 is a block diagram showing an example of the overall configuration. Figures a and b are explanatory diagrams of how to operate the Light Ben, and Figure 5 is a signal waveform diagram, where a shows the photoelectric conversion output of the Light Ben and b shows the waveform shaping output of the input/output control section. 1...Scale, 2...Scale graduation, 4...Bend tip guide groove, 5...Light source, 6...Photodetector,
7... Lens (bent tip), 8... Switch, 10...
...Pressure-sensitive conductive rubber plate, 12...Measurement part, 1
3... Control/calculation unit, 14... Display unit, 15... Keyboard, 16... Input/output interface unit, 17... Scale reference line. Figure 2 Figure 3 Figure 1 Figure 4 Figure 5

Claims (1)

[Scope of Claims] 1. Equipped with an electronic computer that calculates and displays length measurement results and mutual magnifications of the length measurement results, an operation keyboard, and a length measurement unit that performs length measurements and inputs the information to the computer. Now, in the magnification measuring device, the measuring section of the length measuring unit has a scale with black and white line graduations that can be detected optically, and the scale is scanned over the graduations of the scale, and the number of graduations scanned is read by optical reflection. A magnification measuring device characterized by comprising a light pen. 2. The magnification measuring device according to claim 1, wherein the operation keyboard is equipped with a function key for specifying a calculation method and a numeric key for inputting numerical data.