SU124219A1 - Reader for sorting machine - Google Patents

Description

Known devices that read the coded address data containing a line of readable photocells. The disadvantages of such devices are that it is impossible to ensure, with their help, a sufficiently high sorting accuracy, correspondence due to errors in decoding addresses caused by skewed envelopes with coded marks on them.

In the described device, these drawbacks are eliminated by installing a line of following photocells connected to a counting circuit in front of the reading photoelectric line. The line of the following elements selects only that of the photo cell 1 {that; that will correctly read the code marks sorted by K () on the KoifBepr event).

The block diagram of the described device is shown in the drawing.

The letters of the coded address are affixed to the envelope of the sorted correspondence in the form of lines consisting of six rectangular characters (one control and five coded), following each other and located across the direction of movement of the envelope before the reading device.

The reading device consists of an illuminator, a light modulator and an optical device, with the help of which two narrow light strips are projected onto the envelope, spaced from each other at a distance of 1 and equal to the length of the code tag, line 1 of the following photodiodes, line 2 of reading photodiodes and the lens projecting on rulers light strips from an envelope.

The illuminator, the light modulator and the optical system are not listed on the screen.

To eliminate the influence on the device operation, the inaccuracy of the installation of the letter and the distortions of the code written in the envelope serves

No. 124219

Line P1 melting foto; 1el engov. Linear photodiodes having an even number are shifted in the direction of the sweep from diodes having an odd number.

Each of the photodiodes of the Line | ki / is connected to the input of the corresponding amplifiers, not shown in the drawing, the outputs of which are connected to a tracking system consisting of a teerator of 3 pulses, an addition circuit 4, a counter 5 pulses, and a subtraction circuit 6. When a signal is output from one of the following photodiodes triggers the corresponding pulse generator. After the end of the signal, the generator generates another additional pulse.

The combining circuit sums the signal, postavlyayuschy from the next photodiode, with the pulse of the generator and when they co-operate, produces a pulse applied to the input of the counter. After counting a certain number of pulses (for example, equal to the number of lines of the code card), the counter includes a Kipp-relay 7 corresponding to the following photodiode. The Kipp-relay number is chosen equal to the number of the following photodiodes. Kip-relays are used to connect the corresponding reading photodiodes of the line 2 to the block of lamp 8 with electronic switches 9.

In subtraction circuit 6, the generator emulsion is subtracted from the signal of the following photodiode, and in the absence of this signal, subtraction circuit 5 sends a reset pulse to the input of counter circuit 5, as a result of which the counter does not accumulate impulses from random envelopes.

The memory unit 8, for storing information at the time of the middle of code marks past the photocells, is controlled by an annular distribution circuit 10. Switching the annular circuit produces signals generated by control of their stamp marks.

The number of memory block elements is equal to the number of characters of the total combination of the coded address. The number of cells in the ring-length circuit is equal to the number of letters in the coded address. When the last control signal is received from the Zero cell of the recalculated ring, a read and reset pulse is sent to the accumulated combination. Preliminarily, this pulse is delayed by means of a delay unit // for the time required for the operation of the memory elements of the last row.

The selective circuit, consisting of the coincidence circuit 12 and the KIPP-relay system 13, selects the sorting direction according to the total combination of the signals of the coded address. The choice of sorting according to the total combination of signals without first decrypting the code combination makes it possible to increase the efficiency of the reading device. With the help of the corresponding KIPP relays 13 a pulse from the output of the coincidence circuit is fed to the executing mechanism. The selection of the appropriate sorting level, which ends the automatic letter sorting cycle.

PREPARATION AND RESULTS

Claims (3)

1. A reader of a sorting machine containing a Line reader of 1 photo photse / gement, characterized in that, in order to increase the accuracy of sorting and eliminate the influence of a misalignment of envelopes with coded marks on them, a ruler trace is installed in it before the ruler photo cells connected to the outputs of the counting circuit, produced by means of control signs N1tamp, the choice of only that of the reading photocells that correctly reads the code marks printed on the colvert. 2. The device according to claim 1, characterized in that it uses a ring distribution to memorize information at the time of passing the middle of the code digits past the photoelectric heading; the circuit is switched by signals generated by the control knockdown symbols. 3. The device according to claim 2, characterized in that, since the whole of its efficiency, it has applied a selective scheme that serves to select the direction of sorting according to the total combination of coded ad signals | 1es without preliminary decryption of the code combination .  3 -№ 124219