SU633044A1 - Coin validity check device - Google Patents

Description

one

This invention relates to coin control devices and can be used to analyze coins and sort them.

A known coin tester, designed to determine the dignity of the latter by their full electrical conductivity, contains an inductive sensor, the coil of which is mounted on a magnetic core placed coaxially inside the coil, setting devices and software designed to stepwise change the sensor setting during the test of each coin f1.

However, the use of such a device is limited to the size of a small number of coins.

The closest technical solution to this invention is a coin analyzer that contains a receiving unit with a guide channel, an indicating unit whose output is connected to the input of an actuator, kinematically connected to the gate installed in the coin collector, and the M. Yonet counter passing through is exposed to an alternating magnetic field, and the reaction of the coin to this effect is compared with the reference values, and depending on the result of the comparison, the coin is sent to Resp compartment.

A disadvantage of this device is the low accuracy of determination of the type of coins and, in addition, the number of types of recognized coins is also limited.

The aim of the invention is to improve the accuracy and expand the functionality of the device.

The goal is achieved by introducing a soundproof chamber, a hard plate, for example, a steel plate, a measuring microphone, an amplifier and a sound vibration spectrum analyzer, a guide channel and a coin collector in the device, connected to a soundproof chamber, inside which a solid plate and a measuring microphone are installed, connected through an amplifier to the input of the sound spectrum analyzer, the outputs of which are connected to the display unit and the counter.

The drawing shows the proposed device.

Claims (2)

The device contains a receiving unit 1 with a guide channel 2 connected to a soundproof chamber 3, inside of which is placed a solid plate 4 and a microphone 5; coin collector 6, amplifier 7, spectrum analyzer 8 sound vibrations, display unit 9 and counter 10. The drawing also shows a falling coin 11. The coin collector 6 has a system for resetting substandard coins consisting of a shutter 12 connected tightly to the test one. the mechanism (for example, an electromagnet) 13 and the overlapping channel of the discharge 14. The electromagnet 13 is supplied with voltage from the display unit 9. The device operates as follows. The coin 11 enters the receiving unit 1, where it is oriented in a certain way by means of a guide channel, when moving along which the speed of the coin is also normalized. From the receiving unit 1, the coin 11 enters the soundproofed chamber 3, where it falls on the rigid plate 4 and, having bounced off it, enters the coin collection 6. When struck in coin 11, mechanical oscillations are excited and the coin, having rebounded from the plate 4, emits a sound. In this case, the oscillation spectrum uniquely characterizes this coin 11, if the conditions for the excitation of oscillations are standard for all coins. The sound is perceived by microphone 5 and the received signal after amplification is fed to the spectrum analyzer 8 sound vibrations. From the spectrum analyzer 8, the signal in the form of a set of harmonics is fed to an indicator block 9, which converts the information about the spectrum into digital information about the dignity of the coin. The display unit 9 can be made in the form of a set of comb filters, each of which is tuned to the spectrum of a certain coin, and the total number of filters must be equal to the number of types of expected coins. At the output of each filter there is a logical element that, when a signal corresponding to the given spectrum arrives at it, turns on a certain combination of numbers on the screen. Another construction of the display unit 9 provides for a single comb filter and a set of logic elements, including the highlighting of numbers on the screen, depending on the spectral composition of the signal. The signal from the spectrum analyzer 8 is also fed to the counter 10, which gives the total amount received by the analyzer. If the spectrum of the incoming coin coincides with one of the spectra provided in the display unit 9, the coin passes into coin collection 6, since the electromagnet 13 is not powered and the shutter 12 blocks the input of the reset channel (is in the LeBOM, in the drawing position). If the spectrum of the coin does not coincide with any of the indications 9 provided in the display unit, then the electromagnet is energized and the shutter 12 moves to the right position, opening the reset channel input and closing access to the coin collector 6. The device allows not only to read and identify coins, but also detach counterfeit, damaged, etc. substandard coins. The number of types of coins to be detected depends on the number of, for example, comb filters in display unit 9 and is practically limited only by the size of the machine. Claims An analyzer of coins, comprising a receiving unit with a guide channel, an indication unit, the output of which is connected to the input of an actuator, kinematically associated with a gate installed in the coin collector, and a counter, characterized in that, in order to improve the accuracy and expand the functional capabilities of the device, a soundproof chamber, a hard plate, a measuring microphone, an amplifier and a sound spectrum analyzer, a guide channel and a coin collector are inserted into the sound an isolated chamber within which a hob and a measuring microphone, an amplifier connected to the input of the spectrum analyzer of sound vibrations, the outputs of which are connected to the display unit and the counter. Sources of information taken into account in the examination: USSR Author's Certificate No. 413510, cl. G 07 F 3/00, 1973. 2. Patent of France No. 2252612, cl. G 07 D 5/00, 1976.