DE102010000008A1 - Self-service apparatus e.g. automatic cash dispenser has transmitter to transmit characteristic data signal and receiver to receive characteristic data signal to recognize manipulation device attached before cash outputting aperture - Google Patents

Abstract

The apparatus has cabinet which comprises aperture for outputting the banknote and shutter (9) that closes the aperture in primary position and opens the aperture in secondary position. The cabinet includes transmitter (S) and receiver (E) for recognizing the manipulation device (8) attached before the aperture. The transmitter transmits the characteristic data signal, and the receiver receives the characteristic data signal for recognizing the manipulation device.

Description

The present invention relates to a self-service device according to the preamble of claim 1.

Such self-service devices are known for example in the form of value machines, in particular cash dispensers, or bank statement printer in various designs. The housing of such a self-service device is designed according to the intended use.

The opening for the issue of banknotes, in particular banknotes is usually protected by a closure. One of the most common fraudulent types of tampering with such a self-service device is the placement of static stems in front of that value issue area to intercept the bills of exchange before they can be withdrawn by a customer (so-called "cash trapping").

To detect such manipulation attempts, it is known, for example, to arrange a distance sensor in a window frame surrounding the shutter, wherein the distance sensor is provided before the shutter, i. H. to the outside of the device, is arranged and scans the area in front of the shutter.

From the DE 10 2008 023 582 A1 It is known to form this distance sensor as a light barrier, wherein the transmitter emitting a light beam of the sensor is arranged on the outside of the device and the light beam receiving receiver is arranged in the housing of the self-service device behind the discharge opening 6 in the housing interior.

Such systems have proven themselves in practice quite well. The problem is that the fraudulently mounted manipulation device in turn could be equipped with a light source and so the received radiation from the receiver is mistaken for the radiation of the transmitter of the light barrier.

The object of the present invention is therefore to provide a self-service device with which an optimized recognition of such manipulation devices is made possible, in particular with which the fraud attempt described above can be recognized.

This object is achieved by the self-service device with the features of claim 1.

According to the invention, the transmitter is designed as a characteristic data signal emitting transmitter and the receiver as the characteristic data signal of the transmitter recognizing characteristic data receiver. The embedding of such a code signal in the signal of the transmitter, the transmitter is no longer interchangeable with a fraudulently mounted transmitter, so that a mounted in front of the dispensing opening manipulation device is reliably recognizable.

Further advantageous embodiments of the invention are the subject of the dependent claims.

According to an advantageous embodiment, the identification signal is designed as a pulse-pause-modulated signal over which, for example, random numbers can be transmitted. This ensures in a simple manner that it is unpredictable which data sequence is transmitted.

According to an advantageous embodiment, the transmitter is designed as the characteristic signal emitting infrared LED. According to an embodiment variant, the receiver is accordingly designed as a phototransistor or according to a further embodiment variant as a photodiode coupled to a transimpedance amplifier. The use of such LEDs and phototransistors or photodiodes represents a cost-effective variant of a transmitter-receiver system to which data signals can be modulated in a simple manner.

Embodiments of the invention will be explained in more detail with reference to the accompanying drawings. Show it:

1 a schematic front view of a self-service device in the form of a ticket dispenser,

2 a schematic detail view of the value note output area of the self-service device and the arrangement of transmitter and receiver,

3 an exemplary representation of a transmitter signal,

4 an embodiment of a transmitter circuit,

5 an embodiment of a receiver circuit and

6 a schematic block diagram of an evaluation circuit.

1 shows a schematic view of a self-service device 1 in the form of one Bank note dispensing machines. In the case 2 of the value stamp dispenser is a screen 3 for displaying information for a user, a card slot 4 for entering a magnetic card, such as a bank card, a slip dispensing slot 5 and a dispensing opening 6 arranged to give up notes of value.

As in 2 shown is the dispensing opening 6 with a preferably motor-driven closure 9 provided in a first position the opening 6 closes and releases in a second position the dispensing opening for the issue of notes of value. The closure 9 is also called a "shutter". Banknotes to be paid out are given to the customer with the lock open 9 through the then released dispensing opening 6 presented for removal. To protect this discharge opening 6 before the entry of water or dust is the discharge opening 6 from a frame 7 Surrounded by the housing 2 of the self-service device 1 opposite the dispensing opening 6 protrudes outwards. handling devices 8th who fraudulently attached to the self-service device 1 are arranged, are preferably in or on the frame 7 before the delivery opening 6 mounted, preferably in the form of a specially prepared dummy closure.

As in 2 is to be seen is in the dispensing opening 6 behind the clasp 9 a receiver E is arranged, which receives a signal from one in the area of a control panel 10 outside of the housing 2 of the self-service device 1 attached transmitter S receives. The transmitter S and the receiver E are placed so that one before the discharge opening 6 attached manipulation device 8th the transmission path LW between transmitter S and the receiver E would break. The transmitter S is preferably designed as an optical transmitter, in particular as an infrared LED. The receiver E is preferably suitable for receiving optical signals and accordingly preferably designed as a phototransistor or as a photodiode coupled to a transimpedance amplifier.

In order to avoid that the signal of an LED attached to the manipulation device is erroneously held by the receiver E for the radiation of the transmitter S, the transmitter S is designed such that it is suitable for transmitting a characteristic data signal K. This characteristic data signal K is designed in particular as a pulse-pause-modulated signal.

The 3 shows a variant of such a characteristic signal K. Accordingly, the receiver E is coupled to an evaluation circuit which compares the received from the receiver E Kenndatensignal K with the radiated from the transmitter S Kenndatensignal. The identification data signal K preferably contains random numbers in order to preclude a predictability of the data transmitted to the transmitter.

The characteristic data signal K embodied as a pulse-pause-modulated signal according to an embodiment variant has as a basic variable the length of a so-called burst, which is used as a separator between individual data information. This individual data information preferably consists of ten periods with a duration of, for example, 200 μs, so that a burst is a total of 2 μs long. The pauses between the individual bursts define the data to be transmitted. Thus, a pause of the length of a burst length, in the example given here, corresponds to 2 μs, a 1. A pause of two burst lengths corresponds to a 0. Furthermore, a start character is defined by a burst of triple length and an end character of two burst lengths. Once this end token is received, the byte so transmitted can be passed.

4 shows an embodiment of a transmitter circuit, in which a transistor can be seen in the emitter circuit, so that it can be determined for the input voltage of the current through the LED.

5 shows a variant of a receiver circuit. In this a phototransistor is used. The receiving voltage is tapped here on the working resistor. In addition, it is possible to derive a current at the operating point via a transistor. This transistor is also connected in the emitter circuit, so that the suction current can be determined by the height of the input voltage. This makes it possible to keep the operating point in a range in which the data transmission is possible, even with extraneous light.

6 shows a schematic block diagram of the measurement and conditioning of the characteristic signals. Since this measured signal is an alternating signal with a DC component, the useful data of the characteristic signal must be filtered out by means of a bandpass filter. The alternating signal is then converted by a comparator into a square wave signal. Behind the comparator is a retriggerable astable flip-flop with a hold time of 250 microseconds (according to the application example described above). As a result, a continuous signal is generated from the individual pulses of the bursts. The pulse and pause times are then measured and interpreted.

LIST OF REFERENCE NUMBERS

1

Self-service device

2

casing

3

screen

4

card slot

5

Document output slot

6

discharge opening

7

frame

8th

manipulation device

9

shutter

e

receiver

S

transmitter

LW

send path

K

Characteristics signal

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008023582 A1 [0005]

Claims (8)

Self-service device ( 1 ), in particular ticket machine, comprising - a housing ( 2 ), - one in the housing ( 2 ) opening ( 6 ) for the issue of notes of value, - the opening ( 6 ) through a closure ( 9 ) in a first position of the closure ( 9 ) and in a second position of the closure ( 9 ) is releasable for the issue of notes - at least one transmitter (S) and a receiver (E) for detecting one before the opening ( 6 ) attached manipulation device ( 8th ), characterized in that - the transmitter (S) as a characteristic data signal (K) emitting the identity card transmitter and the receiver (E) as the characteristic data signal of the transmitter (S) recognizing characteristic data receiver is formed. Self-service device ( 1 ) according to claim 1, characterized in that the identification signal (K) is designed as a pulse-pause-modulated signal. Self-service device ( 1 ) according to claim 1 or 2, characterized in that the identification signal (K) contains at least one random number. Self-service device ( 1 ) according to one of the preceding claims, characterized in that the transmitter (S) as the characteristic signal (K) emitting infrared LED is formed. Self-service device ( 1 ) according to claim 4, characterized in that the receiver (E) is designed as a phototransistor, wherein the phototransistor is coupled to an evaluation circuit. Self-service device ( 1 ) according to claim 4, characterized in that the receiver (E) is designed as a coupled to a transimpedance amplifier photodiode. Self-service device ( 1 ) according to one of the preceding claims, characterized in that the receiver ( 8th ) in the opening ( 6 ) behind the closure ( 9 ) is arranged. Self-service device ( 1 ) according to claim 7, characterized in that as a transmitter (S) at least one outside of the housing ( 2 ) and a control panel ( 10 ) of the self-service device ( 1 ) illuminating lighting element is formed.

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