JPH10240857A - Read system of optical reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect and recognize a timing mark in advance so that read data of entry marks of a mark card can be processed immediately by arranging a sensor which detects the timing mark, offsetting the beam from a light emitting element through the center of a rod lens, and irradiating and recognizing respective mark positions on recording paper. SOLUTION: When the recording form 5 is inserted, the light beam of an optical sensor member 4 of the timing mark detection sensor arranged at an end part of a read part 1 is offset by passing through the center line 3a of the rod lens 3 to irradiate the edge of the recording form 5 through a slit 2. When this recording form 5 is carried, the timing mark is read by the optical sensor member 4 before entry marks of the recording form 5 are read and recognized. Therefore, the entry marks can be stored in a memory immediately after the timing mark is detected and recognized. Consequently, the timing mark can securely be preread.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a data sheet,
The present invention relates to a reading method of an optical reader for reading a mark card such as a test sheet.

[0002]

2. Description of the Related Art In an optical mark reading device (OMR), a mark card such as a data sheet or a test sheet is read in a short time while a large number of mark cards are conveyed at a high speed. It is often used for tabulation of inspections by industry and medical service items.
In order to read such a mark card in a short time and to process the total data, these mark cards are marked with a timing mark of an optical reader, so that the timing mark is detected at the same time as data reading recognition. An optical sensor in the reading member is arranged. In general, a reflection light receiving type sensor is arranged as the optical sensor. Conventionally, a detection sensor for detecting and recognizing an entry mark of a mark card to be conveyed and a sensor for detecting a timing mark are provided in a reading device on a straight line parallel to the center line of the rod lens, that is, a recording paper conveyance direction in a reading portion. It is located on the approach side of. For example, a sensor that detects timing marks arranged at regular intervals on the side edge of a mark card is placed at the end, and a plurality of detection sensors are arranged in the center of the mark card at positions on the same straight line in the width direction. And are arranged as shown in FIG.

[0003]

As described above, since the reflective light receiving type sensors are arranged in the same positional relation in the width direction of the mark card and the reflective light receiving type sensors for detecting the timing marks are arranged as in the prior art, the recording paper ( When the mark card enters the reading portion, the presence / absence of an entry mark is detected simultaneously with the detection of the timing mark. For example, as shown in FIG. 6, the reading range of the entry mark is limited to the detection range of the timing mark, and the entry mark outside this range becomes unreadable and is not adopted as data.
In addition, since the detection position of the timing mark and the detection position of the entry mark are detected on the same straight line, the detection information of the entry mark may be processed only after the timing mark is detected. Filled-out marks were sometimes overlooked. Therefore, only the entry mark after the detection of the timing mark may be subjected to the subsequent processing. As described above, the position of the conventional timing mark detection sensor is often inconvenient. In addition, in the conventional optical reading device, the reading of the timing mark is performed at the same position as the entry mark, so that the reference of the entry mark is not set before the reading of the timing mark, so that the reading range of the entry mark is narrow, The decision of standards was slow. Therefore, there is a disadvantage that the calculation processing of the data mark is not accurate.

SUMMARY OF THE INVENTION An object of the present invention is to provide a reading method of an optical reading device capable of immediately processing read data of an entry mark on a mark card and detecting and recognizing a timing mark in advance.

[0005]

The above object of the present invention can be achieved by the following constitution. The optical lens is composed of a number of marks written on a recording sheet and a number of timing marks for generating timing pulses for data processing of the optical reader, which are arranged on a straight line perpendicular to the conveying direction of the recording sheet. And an optical reader that detects through a slit and performs arithmetic processing on the detected mark data, wherein the optical sensor comprises a sensor in which a light emitting element and a light receiving element are combined, and a rod lens orthogonal to the transport direction. A detection sensor that reads and reads the entry marks arranged on the recording paper at a position on the entering direction side of the reading member provided with the optical sensor with respect to the center line of the sensor, and detects the timing mark at a position on the discharging direction side And the beams from the light emitting elements of the detection sensors and the detection sensors are Each mark position of the recording sheet is offset through the center of the lens is to irradiation recognition.

The object of the present invention is to provide a configuration in which a number of the timing mark detection sensors are arranged in a straight line on the entrance side of the reading member and the discharge sensor is rotated by 180 degrees around the center of the rod lens. Can be achieved. The above object can also be achieved by a configuration in which the position of the detection sensor of the timing mark and the position of the detection sensor are arranged at the same distance from the center line of the rod lens.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The reading system of the optical reader according to the present invention uses a rod lens to detect a timing mark and an entry mark of a recording sheet conveyed in the optical reader. The light beam of the detection sensor is offset through the center line of the rod lens, the irradiation is recognized, and the timing mark of the recording sheet that has entered the reading member since it is located on the discharge side from the center line of When the recording paper passes through the slit of the reading member and advances, the light beam of the detection sensor arranged on the entrance side of the reading member is irradiated through the center of the rod lens, and the entry mark is detected. Accordingly, since the entry marks on the recording sheet are always detected after the detection of the timing marks, all the entry marks can be adopted as information data.

According to the reading method of the present invention, the timing mark can always be read first, so that the reading range can be expanded as compared with the related art. For example, as shown in the timing chart of FIG. 6, in the reading method of the present invention, the reading range is expanded, all the marks on the mark card can be reliably recognized, and the data can be used as integrated data.

A reading method of the optical reading apparatus according to the present invention will be described based on an embodiment shown in the drawings. FIG. 1 is a side view of an optical reader according to the present invention. FIG. 2 is a partially enlarged plan view of FIG. FIG. 3 is a perspective view of an optical reader employing the reading method of the present invention. FIG. 4 is a block diagram of the control unit of the reading system according to the present invention. FIG. 5 is a flowchart of an embodiment of the optical reader according to the present invention. FIG.
4 is a timing chart comparing the reading method of the present invention with a conventional method. 7 is a partially enlarged plan view of the conventional reading method.

The reading section 1 of the optical reading apparatus comprises a slit 2, a rod lens 3, and an optical sensor member 4. The optical sensor member 4 is formed of a light emitting diode 4a as a light emitting element and a phototransistor 4b as a light receiving element. A light beam for detection from the light emitting diode 4a passes through the center line 3a of the rod lens 3 and is slit. 2 and irradiate the position of the timing mark 6 on the recording paper 5 and the reflected light is received by the phototransistor 4b. On the other hand, the light emitting diodes 4a1, 4a1... And the phototransistors 4b1, 4b1... Arranged on the entrance side of the recording paper 6 from the center line 3a of the rod lens 3 of the reading unit 1 are arranged in parallel on a straight line. is there.

The analog data for which the timing mark has been detected and recognized in this manner is binarized and converted into a digital signal, which is input to a control processing unit (CPU). A digital signal obtained by binarizing a signal detected by a subsequent entry mark is controlled and stored in a memory. At this time, storage control is performed by the digital signal of the timing mark. As shown in the flowchart of FIG. 5, an interruption is performed by the detection signal of the timing mark 6, and the detection data of the entry mark is digitally processed to be binarized and stored in the memory. Reading is continued while detecting the timing mark 6 on the recording paper.

A reading method according to the present invention will be described with reference to the drawings. In FIG. 2, when the recording paper 5 is inserted from the right side, the light beam of the light emitting diode 4a of the detection sensor for the timing mark 6 disposed at the end of the reading unit 1 is offset through the center line 3a of the rod lens 3,
The light is irradiated to the edge of the recording paper 5 through the slit 2. When the timing mark 6 is detected, processing is performed for the subsequent detection of the entry mark. For example, when the recording sheet 5 on which the timing mark 6 is detected is conveyed, the presence or absence of each entry mark is detected by the light emitting diodes 4a1, 4a1,... And the phototransistors 4b1, 4b1,.

The reading method of the optical reading device of the present invention is as follows.
When the recording sheet 5 is set at a predetermined position in the optical reading apparatus and the recording sheet 5 is conveyed, the timing mark 6 is read by the light emitting diode 4a and the phototransistor 4b at a stage earlier than the reading recognition of the entry mark on the recording sheet 5. Therefore, the entry mark can be stored in the memory instantly from the stage of detecting and recognizing the timing mark 6.

[0014]

According to the reading method of the optical reading apparatus of the present invention, the timing mark is detected prior to the detection of the entry mark written on the recording sheet. The timing mark can be detected prior to the mark. For this reason, not only can the timing mark be prefetched reliably, but also data processing can be performed without overlooking the data processing. In addition, the position of the timing mark detection sensor can be set irrespective of the entry mark reading position.

[Brief description of the drawings]

FIG. 1 is a side view of an optical reader according to the present invention.

FIG. 2 is a partially enlarged plan view of FIG.

FIG. 3 is a perspective view of an optical reader employing the reading method of the present invention.

FIG. 4 is a block diagram of a reading type control unit according to the present invention.

FIG. 5 is a flowchart of a reading method according to the present invention.

FIG. 6 is a timing chart comparing a reading method according to the present invention with a conventional method.

FIG. 7 is an enlarged partial plan view of an optical sensor unit of a conventional optical reading device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Reading part 2 ... Slit 3 ... Rod lens 4 ... Optical sensor member 4a ... Light emitting diode 4b ... Phototransistor 5 ... Recording paper 6 ... Timing mark

Claims (4)

[Claims] An optical sensor in which a large number of mark marks written on a recording sheet and timing marks for generating a timing pulse for data processing of the optical reader are arranged on a straight line perpendicular to the conveying direction of the recording sheet. An optical reader that detects through a rod lens and a slit and processes the detected mark data, wherein the optical sensor comprises a combination of a light emitting element and a light receiving element. A detection sensor for reading and reading the entry marks arranged on the recording sheet at a position on the entering direction side with respect to a center line of the rod lens orthogonal to the transport direction of the reading member provided at the position on the discharging direction side. A detection sensor that detects the timing mark is arranged, and the detection sensor and the light emitted from the light emitting element of the detection sensor A reading method of an optical reading device, wherein a mark is offset through a center of the rod lens to irradiate and recognize each mark of a recording sheet. 2. The sensor according to claim 1, wherein a plurality of detection sensors for the timing mark are arranged in a straight line on the entrance side of the reading member and a discharge side position rotated by 180 degrees around the center of the rod lens. The reading method of the optical reading device according to claim 1. 3. The optical system according to claim 1, wherein the position of the detection sensor of the timing mark and the position of the detection sensor are arranged at positions equidistant from the center line of the rod lens. The reading method of the reader. 4. The sensor according to claim 1, wherein the detection sensor comprises a light emitting / receiving sensor in which a light emitting diode as a light emitting element and a phototransistor as a light receiving element are combined. The reading method of the optical reading device.