JPS6232072A - Apparatus for testing printing - Google Patents

Abstract

PURPOSE:To enable the unification of an inspection judgement standard and to perfectly eliminate a judging error while attaining the shortening of a test time, by providing such a mechanism that a reading part is mounted to a printing head and a printing result can be automatically tested if printing data is fed out. CONSTITUTION:The printing head part 10 of a printer moves a head guide 11 left and right and the character or mark based on printing data is printed on supplied printing paper 8. The image scanner part 12 reading this printing result is mounted to the printing head part 10 of the printer and moves in the same way as the printing head 10 during printing. The image scanner part 12 successively scans the previously printed character and feeds out the obtained data to a read data reading part 13. The read data reading part 13 performs the delivery of a character from the fed data and extracts the characteristics of the character to process the same while the distance calculation of the obtained data and printing data with a standard pattern is performed and printing quality is judged from the result of said distance calculation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a test device for determining whether a print result output from an input/output device is 1 or 1.

[Conventional technology]

2. Description of the Related Art If an input/output device, such as a printing device, is poorly manufactured, it is necessary to judge whether the characters output on paper are good or bad.

Conventionally, there was no special testing equipment for this purpose, and the quality of printing results depended solely on the human eye.

[Problem that the invention seeks to solve]

In the conventional testing method described above, it is difficult to standardize the pass/fail judgment criteria for all examiners because it is performed by human eyes.
With the development of A-equipment, it is expected that many kanji characters and complex symbols will become available, and as a result, there is a drawback that testing of printed results requires a large number of man-hours.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printing test device that can shorten the testing time for printing results and unify the criteria for the test.

[Means for solving problems]

In order to achieve the above object, the printing test device according to the present invention is attached to the print head portion of the input/output device to be tested by moving the head guide portion left and right, and optically scans characters, etc. printed on paper. A reading circuit reads the characters, a print data sending section supplies print data to the print controller section of the input/output device, and the characters, etc. read by the reading circuit and the corresponding print data of the print data sending section are read by a certain method. It is composed of a print result quality determination circuit that compares and determines whether the print result is good or bad.

According to the above configuration, by attaching the reading section to the print head and sending the print data, the print result can be automatically tested.
All of the conventional problems such as the inability to standardize judgment standards, which leads to judgment errors, and the time it takes to complete the test, will all be resolved.

[Actual flow side]

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a printing test device according to the present invention. In the input/output device, only the printing section 4 and the printing controller section 5 which controls printing of the eggs 3 and 14, which are directly related to the present invention, are described.

A print reading circuit 1 is attached to the print section 4.

The print reading circuit reads characters and the like outputted on paper by the printing unit 4 by optical scanning, and sends the data to the print result quality determination circuit 2.

The print data sending unit 3 supplies print data to the print controller unit and also sends it to the print result quality determination circuit 2.

The print result quality determination circuit 2 compares this print data with data such as characters, symbols, etc. outputted on paper using this print data and read, using a certain method, and outputs a result of determination of quality.

FIGS. 2(a) and 2(b) are a plan view and a side view showing a state in which an image scanner is attached to a print head portion. [Printer print head section] O moves the head guide 11 left and right, and prints characters based on print data on the supplied print paper.
Print symbols etc.

The image scanner section 12 for reading the printing results is mounted on the apprinter print head section 10, and moves in the same manner as the print head 10 during printing.

The image scanner section 12 prints first and sequentially scans the next (1st to 2nd) characters, and sends the data obtained by scanning, for example, 10 books/1 mn to the read data reading section 13. The print reading circuit and the mq data reading section 13 are circuits corresponding to a print result quality determination circuit, respectively.

The read data interpretation unit 13 cuts out characters from the data sent from the image scanner 12, extracts and processes the characteristics, and then calculates the distance between the obtained data and the standard pattern of the print data. The quality of printing is determined based on the results.

Feature extraction involves normalizing the size and position of the extracted characters,
There are four processes: 8-way quantization, data compression, cell feature extraction, and data compression.

〔Effect of the invention〕

As described in detail above, the present invention attaches a reading circuit to the printing section of the input/output device to be tested, supplies print data to the input/output device from the print data sending section, and prints out characters and symbols on paper. etc. are read by a reading circuit, and the read data and printed data are compared based on a certain standard to determine pass/fail, so inspection criteria can be unified.
This has the effect of eliminating all judgment errors and shortening test time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a printing test device according to the present invention, and FIG.
The figures show an embodiment of the printing test device according to the present invention, in which (a) is a plan view and (b) is a side view. 1...Print reading circuit 2...Print result quality judgment circuit 3...Print data sending section 4...Printing section 5...
Print controller section 6... Input/output device 7... Print test device 8... Print paper 9... Ink ribbon lO... Printer print head 11... Head guide section 12... Image scanner 13 ---Read data interpretation section 1 Figure 2m (Q) (shi)

Claims (1)

[Claims] A reading circuit that is attached to the print head of the input/output device to be tested that moves the head guide section from side to side, and reads characters, etc. printed on paper by optical scanning, and a print controller for the input/output device. A print data sending section that supplies print data to the printing section, and a print result quality judgment that compares the characters read by the reading circuit and the corresponding print data of the print data sending section using a certain method to determine whether the print results are good or bad. A printing test device consisting of a circuit.