SU1336063A1 - Method of checking bank-notes for decrepit state - Google Patents

Abstract

The invention relates to a method of controlling securities and is intended for use in the institutions of the USSR State Bank in the automatic sorting of cash tickets for further validity and dilapidated tickets. The invention can also be used to control the dilapidation of other securities or to control the quality of the paper during manufacture. The purpose of the invention is to increase the accuracy of the control. For this, in the process of transportation, the money ticket is oriented with a white stripe to the source of optical radiation, envelops the white band with radiation in the spectral range of 400-1100 nm and estimates the decay based on the results of the conversion of optical radiation not absorbed during its interaction with the white band. 1 il. (L with O5 about 05 with

Description

The invention relates to the field of monitoring the status of securities and is intended for use in the institutions of the USSR State Bank in the automatic sorting of cash tickets for dilapidated and suitable for further circulation.

The purpose of the invention is to increase the reliability of control due to the expansion of the spectral range of optical radiation irradiating a money ticket.

The drawing shows a device diagram illustrating the proposed method.

The device consists of an optical radiation source 1, transporting rollers 2, a fixed guide plate 3, a movable guide plate 4, an integrating photometric camera 5, photoelectric transducers 6 and 7 connected in parallel. The source of optical radiation is a radiating diode with a maximum of the spectral density of the radiation at 927 them. For Control, cash tickets are served individually by piece mechanism. With the help of transporting rollers, the controlled cash ticket 8 moves along the guide plates perpendicular to the plane of the pattern at a speed of 3 m / s. When you load the cash tickets into the device, they are pre-oriented so that the part 9 with a white stripe is located near the fixed guide plate. Cash tickets upon admission to the institutions of the State Bank of the USSR always have oriented stacking in the feet and are sorted according to their merits. In order to orient the cash tickets relative to the source of optical radiation, a movable guide plate is placed along the length of the cash tickets processed. The fixed and movable guides restrict, when controlled, the movement of a cash ticket along its long side. At the same time, due to the location of the optical radiation source near the fixed guide during control, a portion of the cash ticket is irradiated in the area of its white flow.

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loses The internal surface of the integrating photometric camera has a diffuse scattering coating with exp. reflection coefficient. The illumination of the chamber walls when there is a part of a cash ticket with a white stripe in it is proportional to the radiation flux scattered by this part. The 0c10 material is controlled by photoelectric converters mounted in the chamber. The design and operation of the integrating photometric cameras are widely known. As

15 photoelectric converters use silicon photodiodes. The photoresponse of the photodiodes is the current they generate when illuminated. The magnitude of the current at the output of the photodiodes

20 characterizes the decay of a controlled cash ticket. For example, at a current of less than 5 µA, a controlled cash ticket refers to decrepit tickets, and at a current greater than 5 µA, 25 is valid.

Wide spectral range. radiation that can be applied

for implementing the method, simplifies the implementation of the method, since

sources and photoelectronic converters;

the red and near infrared reflectors are currently the most advanced.

35 The known methods for controlling decay in comparison with the proposed one are characterized by a lower accuracy and a narrower spectral range due to the rapid decrease in accuracy with increasing wavelength. At the same time, the spectral range of radiation that can be used for their implementation is narrow and limited to violet region of the spectrum.

45

Formula of Invention

The way to control the decay of money tickets, consisting in moving

50 cash ticket relative to the source of optical radiation, irradiation of the cash ticket optical radiation, receiving the signal reflected from the cash ticket and comparing

55 of a received signal with a reference signal, characterized in that, in order to increase the control accuracy, before moving the cash ticket, it is oriented with a white stripe towards

1336063

source of optical irradiation,. with a reflected receive optical

optical radiation in the range of 400-1100 nm and additionally

radiation transmitted through the white line of a cash ticket.

radiation transmitted through the white line of a cash ticket.

Claims (1)

Claim The method of controlling the deterioration of cash tickets, which consists in moving 50 money ticket relative to the source of optical radiation, irradiating the money ticket with optical radiation, receiving a signal reflected from the money ticket and comparing it; 5 received signal with a reference one, characterized in that, in order to increase the accuracy of control, it is oriented with a white band before moving the money ticket the optical radiation source is irradiated with optical radiation in the range of 400-1100 nm and, in addition, reflected with the reflected optical radiation transmitted through the white strip of the money ticket.