News Column

"Paper-Type Detection Device and Detection Method" in Patent Application Approval Process

September 4, 2014



By a News Reporter-Staff News Editor at Politics & Government Week -- A patent application by the inventor Liao, Junqing (Guangzhou, CN), filed on October 26, 2012, was made available online on August 21, 2014, according to news reporting originating from Washington, D.C., by VerticalNews correspondents.

This patent application is assigned to GRG Banking Equipment Co., Ltd.

The following quote was obtained by the news editors from the background information supplied by the inventors: "Detecting transmission states of a paper currency in a channel by using an optical sensor is a method generally used in an ATM. A detection apparatus for a paper currency and the like in the prior art usually includes an optical sensor, a control unit and a storage unit. A group of sensor state sequences representing information of paper currencies may be generated under triggering of a given clock when a group of paper currencies pass through the optical sensor in sequence, and the group of the sensor state sequences, after being binarized by the sensor unit, may be described as time sequence logical states shown in Table 1:

"TABLE-US-00001 TABLE 1 time sequences of output states of sensor unit logical state Z of paper currency current state (Q0) next state (Q1) paper currency arrival (S4) lighted (L) shielded (D) paper currency existence (S3) shielded (D) shielded (D) paper currency leave (S2) shielded (D) lighted (L) paper currency nonexistence (S1) lighted (L) lighted (L)

"The transformation among the logical states of the paper currency is implemented by the control unit, the employed method is shown in FIG. 1, where X represents the state value outputted from the sensor unit; the control unit and the storage unit perform different operations according to the logical states of the paper currency and finally record the paper currency information, the commonly-used method is shown in Table 2:

"TABLE-US-00002 TABLE 2 logical state Z of corresponding process corresponding process of paper currency of control unit storage unit paper currency adjusting the value of starting collection of the arrival (S4) the record pointer to sensor state make it point to the next storage location paper currency collecting the sensor state existence (S3) paper currency calculating paper currency leave (S2) information and storing it to the location pointed by the paper currency record pointer nonexistence (S1)

"According to the record method of Table 2, normally only one 'paper currency arrival' state and only one 'paper currency leave' state can occur to the control unit during the whole collection period when a complete paper currency passes through the optical sensor, and therefore an piece of unique paper currency record information corresponds to the paper currency.

"However, paper currencies of various counties in the world are different in design, and paper currencies of some counties themselves have features such as holes and gaps; moreover, the paper currency is easy to be damaged during circulation and is worsened gradually. So several 'paper currency arrival' states and several 'paper currency leave' states might occur when the worsened paper currency passes through the optical sensor (for example, the damaged paper currency has gaps), and thus several pieces of record information are generated for one paper currency. As a result, the state machine shown in FIG. 1 cannot meet the requirement of the paper currency detection for such a case."

In addition to the background information obtained for this patent application, VerticalNews journalists also obtained the inventor's summary information for this patent application: "Embodiments of the present invention provide a paper currency detection apparatus and a paper currency detection method, which can effectively eliminate interferences due to the worsened paper currencies and ensure that the record sequence of the paper currency information is the same as the transmission sequence of the paper currency.

"An embodiment of the present invention provides a paper currency detection apparatus, which includes: a sensor unit for detecting a transmission state of a paper currency according to a fixed clock period, and binarizing the detected signal to represent whether the paper currency appears; a storage unit for collecting the signal detected by the sensor unit, acquiring paper currency information in the signal and storing the paper currency information in sequence; a control unit including a first state counter and a second state counter, where the control unit resets the first state counter and starts the first state counter to count according to the fixed clock period when a time sequence state of the signal detected by the sensor unit represents that the paper currency appears and when a count value of the second state counter is 0 or reaches or exceeds a preset threshold; the control unit adjusts a pointer for recording the paper currency information in the storage unit to point to a next storage location of the paper currency information when a count value of the first state counter reaches or exceeds the preset threshold; the control unit resets and starts the second state counter to count according to the fixed clock period when the time sequence state of the signal detected by the sensor unit represents that the paper currency disappears and when the count value of the first state counter is 0 or reaches or exceeds the preset threshold; the control unit controls the storage unit to store the acquired paper currency information into the storage location pointed by the pointer when the count value of the second state counter reaches or exceeds the preset threshold.

"In addition, an embodiment of the present invention further provides a paper currency detection method, which includes the following steps: A1, detecting a transmission state of a paper currency according to a fixed clock period and binarizing the detected signal to represent whether the paper currency appears, by a sensor unit; A2, resetting a first state counter and starting the first state counter to count according to the fixed clock period by a control unit when a time sequence state of the signal detected by the sensor unit represents that the paper currency appears and when a count value of a second state counter is 0 or reaches or exceeds a preset threshold; A3, adjusting a pointer for recording the paper currency information in a storage unit to point to a next storage location of the paper currency information when a count value of the first state counter reaches or exceeds the preset threshold; A4, resetting the second state counter and starting the second state counter to count according to the fixed clock period by the control unit when the time sequence state of the signal detected by the sensor unit represents that the paper currency disappears and when the count value of the first state counter is 0 or reaches or exceeds the preset threshold; and A5, controlling the storage unit to store the paper currency information acquired from the signal detected by the sensor unit into the storage location pointed by the pointer by the control unit when the count value of the second state counter reaches or exceeds the preset threshold.

"The embodiments of the present invention have the following beneficial effects: the paper currency detection apparatus and paper currency detection method provided by the embodiments of the present invention are particularly applicable for an anti-interference detection of a partially damaged paper currency or a paper material foreign matter in an Automatic Teller Machine (abbreviated as ATM), where the paper currency detection apparatus includes a sensor unit, a storage unit and a control unit, the control unit includes and controls two state counters to count by resetting and starting in cooperation with the sensor unit, eliminates interferences (for example, holes on the damaged paper currency) within a preset threshold by means of a finite state machine (FSM), and therefore effectively eliminates the interferences due to the worsened paper currency and ensures that the record sequence of the paper currency information is the same as the transmission sequence of the paper currency.

BRIEF DESCRIPTION OF THE DRAWINGS

"FIG. 1 is a schematic diagram of logical states of a paper currency in a paper currency detection method in the prior art;

"FIGS. 2a-2b are structural diagram of a paper currency detection apparatus provided by the present invention;

"FIG. 3 is a flow chart of a paper currency detection method provided by the present invention;

"FIG. 4 is a schematic diagram of logical states of a paper currency in a paper currency detection method provided by the present invention;

"FIG. 5 is a flow chart for an updated logical states of the paper currency in the paper currency detection method shown in FIG. 4;

"FIG. 6 is a flow chart for processing information stored in the storage unit corresponding to the updated logical states of the paper currency shown in FIG. 5;

"FIG. 7 is a schematic diagram of processing a paper currency with a hole in the detection method for a paper currency provided by an embodiment of the present invention; and

"FIG. 8 is a schematic diagram of logical states of the paper currency with the hole in the paper currency detection method shown in FIG. 7."

URL and more information on this patent application, see: Liao, Junqing. Paper-Type Detection Device and Detection Method. Filed October 26, 2012 and posted August 21, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=5499&p=110&f=G&l=50&d=PG01&S1=20140814.PD.&OS=PD/20140814&RS=PD/20140814

Keywords for this news article include: GRG Banking Equipment Co. Ltd.

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Source: Politics & Government Week


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