JPS6220033Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a barcode information card that records barcode information encoded by arranging bar symbols of different widths.

Conventionally, this type of card has barcode information in which multiple barcodes are grouped in a row arrangement of bar symbols with white lines and black lines with different light reflection characteristics, and these grouped group barcodes are arranged in columns. is recorded on the card, and the barcode information is read by passing the card to a reading sensor having a plurality of reading elements arranged on a reading line substantially orthogonal to the linear direction of the barcode information. The bar code information is read by relatively moving the bar code in a linear direction and in a direction substantially orthogonal to the reading line, and during the movement, reading operations of the plurality of reading elements are cyclically repeated.

However, in the above configuration, reading is performed by moving the card relative to the reading line, but as the movement speed increases, the reading line and the bar symbol do not intersect at right angles, but at an angle, so the barcode group boundary This may cause problems such as misreading.

In order to solve the above-mentioned drawbacks, the present invention records the bar symbol by inclining it in advance by the apparent inclination of the reading line with respect to the bar symbol, which is determined by the scanning (reading) speed of the reading sensor and the moving speed of the card. The purpose of this is to prevent misreading and improve reading accuracy.

An embodiment of the present invention shown in the drawings will be described below. FIG. 1 is a block diagram of an information reading device for a barcode information card, and 1 is a tungsten lamp 1a.
2 is a light receiving section that receives reflected light from an object based on the irradiated light of the light transmitting section 1;
2b is a lens that focuses the reflected light onto the image sensor 2a. be.
The plurality of photoelectric conversion elements of the image sensor 2a repeat a cyclic reading operation in accordance with a clock pulse of a constant frequency.

3 is a barcode information card according to the present invention, on the surface of which barcode information is printed and recorded in which barcode information is grouped in a linear arrangement of wide and narrow bar symbols 3a, and the linear direction of the bar symbols 3a is A device that provides the image sensor 2a with a reflected light signal from a black and white line at a linear reading position 3b substantially orthogonal to the image sensor 2a, and moves on the reading surface 3d in the direction of the arrow that coincides with the linear direction of the bar symbol 3a. It is.

Reference numeral 4 denotes a data processing circuit section that converts a weak video signal generated by the cyclic reading operation of a plurality of photoelectric conversion elements of the image sensor 2a into data corresponding to the bar code.

Reference numeral 5 denotes a feeding device serving as a moving means for transporting the card 3.
The card is automatically moved at a constant speed along the direction of the arrow, and is composed of a motor, a belt, a pair of rollers, etc., and the card 3 is inserted between the rollers to feed the card.

FIG. 2 is an enlarged view showing the barcode information 3a recorded on the barcode information card 3 in detail. In FIG. 2, 3c is equivalent to the reading line 3b shown in FIG. 1, but whereas the reading line 3b in FIG. 1 indicates the reading position of the image sensor 2a on a stationary object, The reading line 3c indicates the reading position of the image sensor 2a on the moving body, and this reading line 3c is different from the reading line 3b on the stationary body due to the moving speed of the card 3 and the image Depending on the reading speed of the sensor 3, the reading line appears to be inclined by l. The barcode 3a is also printed and recorded in the direction of inclination of the reading line 3c on this moving body, being inclined by the amount of inclination with respect to the direction of movement of the card 3. 3e is a character representation of the barcode 3a.

Next, the operation of the above configuration will be explained.
Now, when the card 3 moves on the reading surface 3d in the direction of the arrow on the National Highway Code and reaches the reading position 3b of the light receiving section 2,
A reflected light signal obtained from the tungsten lamp 1a of the card 3 passes through the lens 2b and forms a read image on the image sensor 2a. At this time, since the image sensor 2a has a plurality of silicon photoelectric conversion elements arranged on the reading line, reflected light signals with different reflectances from the black and white bar symbols on the straight line at the reading position 3d are reflected onto the image sensor 2a. Connect the read image.

However, the plurality of photoelectric conversion elements of the image sensor 2a repeat a cyclic reading operation in accordance with a clock pulse of a constant frequency, and
is moving in a direction perpendicular to the reading line of the image sensor 2a, so the reading position 3b intersects with the barcode 3a at an angle like 3c.

However, as shown in FIG. 2, the barcode 3a is determined by the reading speed (scanning speed) of the image sensor 2a.
Since the barcode 3a is tilted and recorded in advance by the inclination of the reading line 3c determined by the moving speed of the card 3, the reading line 3c and the barcode 3a are always perpendicular to each other. Therefore, the loss of valid read scan lines across one barcode (or barcode group) is reduced, which increases the accuracy of data processing and reduces misreading.

Incidentally, in the above embodiment, when the reading direction of the image sensor 2a is reversed, the barcode 3a is printed and recorded tilted in the opposite direction. The method of tilting is the same in FIGS. 3 and 4. However, FIGS. 3 and 4 only show part of the barcode and omit the rest.

Furthermore, the card of the present invention is effective even when the relative movement between the card and the sensor is not strictly constant, but has some degree of variation.

As described above, in the present invention, when reading information on a barcode information card that is moving relative to the reading sensor, taking into account that the reading line of the reading sensor is inclined on a moving object, In correspondence with this inclination, that is, in correspondence with the inclination determined by the moving speed of the relative movement and the reading speed of the reading sensor, the bar code information is printed and recorded by shifting it in advance in the direction of the inclination. Since the direction of deviation of the barcode information on the moving card almost matches the direction of the reading line on the moving object, the number of effective readings of continuously reading the barcode information from one end to the other increases. This has the excellent effect of preventing erroneous reading and improving reading accuracy. In other words, when reading the barcode information of a moving card, assuming that this information is recorded in the same way as normal barcode information, the faster the card moves, the slower the reading sensor reads it. As a result, the reading line of the reading sensor appears to be inclined and crosses the barcode information diagonally, and as a result, the effective number of readings that can continuously read the barcode information from one end to the other becomes limited. However, by printing and recording the code symbol of the barcode information in advance in accordance with the inclination of the reading line and shifting it in the direction of the inclination, as in the present invention, the deviation of the barcode information and the reading of the barcode information can be reduced. Since the reading lines of the sensor on a moving object can be in the same direction, the number of effective readings by the reading sensor can be increased and erroneous readings can be prevented, and the barcode information card can be moved at high speed. It also has the excellent effect of being able to read with high precision even at low temperatures.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an information reading device for a barcode information card, Fig. 2 is a first embodiment of the barcode information card according to the present invention, and Figs. 3 and 4 are the second and third embodiments. FIG. 3 is a plan view showing examples.

Claims (1)

[Claims for Utility Model Registration] Barcode information based on a combination of linear bar signals is transmitted to a reading sensor in which a plurality of reading elements are arranged corresponding to the reading lines on the stationary body. The plurality of reading elements reads the barcode information at a predetermined speed by moving the barcode information at a predetermined speed in a direction substantially perpendicular to the above reading line and in the linear direction of the bar signal. In a barcode information card on which the barcode information is printed so as to be read cyclically and repeatedly at a reading speed, the reading speed of the reading sensor and the movement speed of the relative movement with respect to the reading line on the stationary body are 1. A barcode information card, characterized in that the bar signal is printed and recorded by shifting the bar signal by the amount of the inclination in the direction of inclination of the reading line on the moving object determined by the inclination.