KR100576035B1 - Paper thickness sensing unit and sensing method - Google Patents

Abstract

The present invention detects whether a check or cash is overlapped by one or two or more sheets using a transmissive optical sensor during check or cash withdrawal or deposit in a check / cash automatic teller machine to accurately withdraw or deposit checks / cash. A paper thickness detection device and a method thereof are provided.

The present invention for this purpose is provided with a light emitting portion of the transmissive optical sensor and a light receiving portion for detecting the amount of light that changes in accordance with the thickness of the paper through the paper in order to detect the paper thickness; The voltage of the light receiving unit is supplied to the comparator and the AD converter, respectively, and is connected to the processor. The comparator is connected to the processor through the memory and the DA converter to determine the paper thickness.

     Paper detection, transmissive optical sensor, paper thickness detection device, paper thickness detection method

Description

Paper thickness detector and its method {PAPER THICKNESS SENSING UNIT AND SENSING METHOD}             

     Figure 1 is a schematic view showing a bill thickness detection device in a conventional cash dispenser

     Perspective,

     2 is an operation configuration diagram showing a paper thickness detection device according to an embodiment of the present invention;

     3 is a flowchart for explaining the method of the sheet thickness detecting apparatus of the present invention.

     * Explanation of symbols for main parts of the drawings

     101: light emitting unit 102: light receiving unit

     103: comparator 104: DA converter

     105 processor 106 AD converter

     107: memory 108: paper

The present invention relates to an apparatus and a method for detecting the thickness of a paper using a transmission type optical sensor, and more particularly, to check or cash out a check / cash to be withdrawn at check / cash withdrawal machine at check / cash automatic teller machine, When you need to count the check / cash that was put into each check / cash deposit, check / cash thickness to determine the correct check / cash count by determining whether the check / cash overlaps It relates to a paper thickness detection device for detecting a and a method thereof.

Regarding financial services, the automatic teller machine is a device that is designed to provide unattended services without any timely consultation, regardless of time, and includes automatic teller machines and automatic teller machines. Is a device that has been developed and used from the initial stage for the computerization of the financial business to be able to withdraw cash only automatically, the automatic cash dispenser is a device equipped with a deposit function in addition to the automatic cash payment function.

As an example, the configuration of the automatic teller machine includes a key input unit which consists of a plurality of keys, which converts the user's input information into an electrical signal, and outputs the information stored in the IC chip depending on the type or type of information stored in the magnetic strip of the bankbook or credit card. It reads the information and transmits it to the central computer of the head office through the communication department to check the identity, record the deposit and withdrawal contents, and return the card or bankbook, and stop the operation when a threat is applied from the outside. Security device that is activated or connected to a professional security service company by a surveillance camera or a surveillance button to enable 24 hours monitoring, a storage unit for storing the program and deposit and withdrawal information for controlling the operation of the system, and the key input unit. The communication unit according to the key input information Main board having a central processing unit that controls the financial transaction function by exchanging information with the central computer of the main store, a communication unit for performing information exchange with the central computer of the main store, information input through the key input unit and the central A display unit that displays the information processed by the processing unit so that the user can recognize it, a printing unit that prints the transaction details on the bankbook, and prints and prints the transaction statement; a check and withdrawal unit that performs check deposit and withdrawal functions; It includes a cash withdrawal unit for depositing and withdrawing money.

Thus, when information for financial transactions is input following the recognition of the bankbook / card, the check and withdrawal unit or the cash withdrawal unit can be operated while performing data communication with the central computer of the head office to perform the required transaction. 1 is a schematic perspective view showing a bill thickness detecting device of an ATM according to the prior art.

The banknote thickness detecting device which can be seen in the prior art is the second banknote conveying roller 14 due to the thickness of the banknote 22 conveyed between the first banknote conveying steel roller 10 and the second banknote conveying roller 14 of FIG. The left and right deformation of) is generated. The detection lever 16 pivots about the 2nd fixed point B by the left-right deformation | transformation of this 2nd banknote conveyance roller 14, and is. The sensing lever 16 is provided with a spring 24 at its upper end.

The sensor unit 18 moves according to the turning of the sensing lever 16, and whether the bill 22 is transferred based on the voltage drop of the hall element 20 according to the displacement of the sensor unit 2. It is configured to detect whether the bills have been transferred.

Therefore, the conventional banknote thickness detecting device has a problem that the mechanical structure is complicated by the structure to be detected by the hole element when the number of transfer of bills passes between the transfer roller.

The present invention invented an apparatus and method for detecting paper thickness using a transmissive optical sensor in place of the conventional complicated structure as described above, and includes a standardized paper such as a check, a bill, a slip, a ballot paper and a paper. The purpose of the present invention is to provide a paper thickness detection device and a method for improving the thickness of a sheet or two or more sheets by using a simple circuit configuration. have.

     In order to achieve the above object, the present invention provides a reference voltage for detecting a light transmittance from a sheet passing through a transmissive optical sensor composed of a light emitting unit and a light receiving unit, converting the detected light transmittance into a voltage and dividing one sheet from the voltage value. The circuit is configured to determine one and two sheets of paper because it is compared with a reference voltage value for dividing the value from the two sheets.

      In addition, the present invention is provided so that the processor can time-division and set one or two reference voltage values; The comparator outputs a low level signal when one sheet of paper passes through the transmissive optical sensor, and the comparator outputs a high level signal when it passes through the transmissive optical sensor with two or more sheets overlapping; If this comparator outputs a high level signal, the value of the variable C2 is increased by one in two periods; As described above, two cycles of one cycle and two cycles are alternately time-divided, and the transmissive optical sensor detects whether the paper is one or more sheets in one cycle, and detects whether the paper is two or more sheets in two cycles.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is an operation configuration diagram showing a paper thickness detecting apparatus according to an embodiment of the present invention, Figure 3 is a flow chart for explaining the method of the paper thickness detecting apparatus of the present invention.

The present invention is made to detect the thickness of the paper 108 using the light emitting unit 101 and the light receiving unit 102 of the transmissive optical sensor, which is a check / cash to be withdrawn at check / cash withdrawal checks / cash dispensers When it is necessary to count and release one by one or count checks / cash input at the time of check / cash deposit, it is judged whether the check / cash overlaps one or two sheets by the circuit configuration of the transmissive optical sensor. Accurate check / cash purchases.

     The range of the paper 108 is standardized such as a check, a bill, a slip, a ballot, a paper. In the present invention, as shown in FIG. 2, the paper 108 is transferred between the light emitting unit 101 and the light receiving unit 102 of the transmissive optical sensor, and at this time, the amount of light reduced as the light quantity passes through the paper from the light emitting unit 101. Is detected by the light receiving unit 102 to detect the thickness of the paper 108 according to the amount of transmitted light.

Then, the voltage of the light receiving unit 102 is supplied to the comparator 103 and the AD converter 106 and input to the processor 105, and the processor 105 is a memory 107 and a DA converter 107. The comparator 103 through the () is configured to determine the thickness of the paper 108.

That is, the paper thickness detecting apparatus of the present invention is a light comparator 101 and a light receiving unit 102 of the transmissive optical sensor, a comparator which inputs a reference voltage for comparing the thickness of the paper 108 with a voltage that changes according to the amount of light received ( 103, a processor 105 for processing the output of the comparator 103 and setting a reference voltage, a DA converter 104 for converting the digital value set by the processor 105 into an analog value, which varies depending on the amount of received light. And an AD converter 106 for changing the voltage into a digital value, a memory 107 for storing information of the A / D converted paper thickness.

The light emitting unit 101 and the light receiving unit 102 of the transmissive optical sensor are spaced apart from several mm to several tens of mm and fixed to face each other in a straight line. A transport path for transporting paper is positioned between the light emitting unit 101 and the light receiving unit 102. The paper 108 may be conveyed along the conveying path by a belt or roller.

Referring to the operation of the paper thickness detecting apparatus of the present invention configured as described above based on the flowchart shown in FIG.

When the paper 108 is transported along the conveyance path and arrives at the transmissive optical sensor (S101), the amount of light from the light emitting unit 101 passes through the paper 108, and the amount of transmitted light decreases. It is detected by the light receiving unit 102. The amount of light sensed by the light receiving portion 102 causes a change in voltage, for example, between 0 V and 12 V depending on the amount of received light, and the change in voltage is input to the AD converter 106 and the comparator 103.

The processor 105 sets a reference voltage value by dividing one cycle and two cycles alternately at predetermined time intervals (S102). First, in one cycle, the processor 105 has a paper 108 passing through a transmissive optical sensor. When there is more than one, the digital value corresponding to one reference voltage for outputting the high level signal to the comparator 103 is input to the DA converter 104 (S103) and converted into an analog value to the comparator 103. Input (S104).

At this time, when one or two sheets of paper pass through the light emitting unit 101 and the light receiving unit 102 of the transmissive optical sensor while overlapping, the comparator 103 outputs a high level signal (S105) and the variable C1. The value is increased by one (S106). In two cycles, when there are two or more sheets of paper 108 passing through the transmissive optical sensor, a digital value corresponding to two reference voltages is input to the DA converter 104 so that the output of the comparator 103 outputs a high level signal. In operation S109, the signal is converted into an analog value and input to the comparator 103 in operation S110.

On the other hand, when one sheet of paper passes through the transmissive optical sensor, the comparator 103 outputs a low level signal (S111), and when the sheet passes through the transmissive optical sensor with two or more sheets of paper overlapped, the comparator 103 is of high level. The signal is output (S111). When the comparator 103 outputs a high level signal, the value of the variable C2 is increased by one (S112) in two cycles. In this manner, two cycles of one cycle and two cycles are time-divided alternately, so that the transmission type optical sensor can detect whether one or more sheets of paper 108 are in one cycle, and two or more sheets of paper 108 in two cycles. Awareness can be detected.

When the paper 108 exits the transmissive optical sensor (S108), one and two sheets are determined (S113) based on the values accumulated in the variables C1 and C2. If the value is large in the variable C1 and the value is small in the variable C2, it is one sheet. If the value is large in the variables C1 and C2, it is two sheets.

The following is a method of setting one sheet reference voltage value and two sheet reference voltage values. When the paper 108 is transported along the transport path and arrives at the transmissive optical sensor (S101), the amount of light detected by the light receiving unit 102 is represented as a voltage and converted into a digital value through the AD converter 106 to be converted into a digital value. Save to (S114). Based on the thickness information of various sheets stored recently, one reference voltage value and two reference voltage values are adaptively updated using an average value or a maximum value (S115).

As described above, the present invention can be simply configured without the need of a mechanical device conventionally used for paper thickness detection, and therefore, its cost is higher than the thickness detection method using a mechanical device in terms of production and maintenance. There is an advantage to reduce the cost.

Claims (4)

In the paper thickness detection device is provided with an optical sensor for transmitting the light transmitted from the light emitting unit to the conveyed paper and then detect the thickness of the bill by detecting the amount of light transmitted by the light receiving unit,     An input terminal of the processor is connected to the light receiving unit of the optical sensor through an AD converter, and another input terminal of the processor is connected to the comparator, and a paper reference voltage output terminal of the processor is connected to the paper reference voltage output terminal of the processor through the DA converter. The reference signal input terminal is connected so that one sheet of paper reference voltage value and two sheets of paper reference voltage value are inputted in a time-division manner, and the processor receives the light quantity signal received through the light receiving unit. And a paper thickness determination signal output stage for determining and outputting the paper thickness according to the result of comparison with each reference voltage value. The paper thickness detecting apparatus of claim 1, wherein the processor is connected to a memory storing paper thickness information so as to provide the comparator with a reference voltage based on the paper thickness information. After transmitting the light transmitted from the light emitting part of the transmissive optical sensor to the conveyed paper, it is received by the light receiving part and input to the processor, and the processor compares the light quantity signal received from the light receiving part of the transmissive optical sensor with the reference signal and transmits the light quantity. In the paper thickness detection method for detecting the thickness of paper according to The comparator outputs a low level signal if the paper does not pass through the transmissive optical sensor, and the comparator outputs a high level signal if the paper passes through the transmissive optical sensor with one or more sheets of paper overlapped. A one-period reference signal setting step of setting a reference signal of the first cycle; A one-cycle comparison step of increasing the value of the variable C1 by one when the comparator compares the one-cycle reference signal with the voltage value received from the light receiver and outputs a high level signal while the paper passes through the transmissive optical sensor; After the one-cycle comparison step, the processor outputs a low level signal when one sheet of paper passes through the transmissive optical sensor, while the comparator passes a high level signal when two or more sheets of paper pass through the transmissive optical sensor. A two-period reference signal setting step of setting a reference signal of the comparator to output the comparator; A two-cycle comparison step of increasing the value of the variable C2 by one when the comparator compares the two-cycle reference signal with the voltage value received from the light receiving unit and outputs a high level signal while the paper passes through the transmissive optical sensor; As a result of the time-divisional comparison of the periods 1 and 2, if the variables C1 and C2 are low level, it is determined that the paper has not passed. If the variable C1 is low level and C2 is high level, it is determined that one sheet has passed. And a sheet thickness determining step for determining that two or more sheets of paper have passed when both and C2 are high level. The method of claim 3, wherein the voltage value of the paper thickness received by the light receiving unit is converted into a digital signal and stored in a memory, and the one reference voltage value and the two reference voltage values are updated using the average value or the mode value of the stored values. Paper thickness detection method characterized in that.

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