WO2016008365A1 - 纸币卡钞判断系统及方法 - Google Patents

纸币卡钞判断系统及方法 Download PDF

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Publication number
WO2016008365A1
WO2016008365A1 PCT/CN2015/083049 CN2015083049W WO2016008365A1 WO 2016008365 A1 WO2016008365 A1 WO 2016008365A1 CN 2015083049 W CN2015083049 W CN 2015083049W WO 2016008365 A1 WO2016008365 A1 WO 2016008365A1
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WO
WIPO (PCT)
Prior art keywords
banknote
sensor
banknotes
card
threshold
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PCT/CN2015/083049
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English (en)
French (fr)
Inventor
殷发志
徐亮
孙志强
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广州广电运通金融电子股份有限公司
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Application filed by 广州广电运通金融电子股份有限公司 filed Critical 广州广电运通金融电子股份有限公司
Priority to EP15822519.3A priority Critical patent/EP3171340B1/en
Priority to RU2017104853A priority patent/RU2652957C1/ru
Priority to US15/325,187 priority patent/US9842452B2/en
Publication of WO2016008365A1 publication Critical patent/WO2016008365A1/zh
Priority to ZA2017/00553A priority patent/ZA201700553B/en

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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D11/00—Devices accepting coins; Devices accepting, dispensing, sorting or counting valuable papers
    • G07D11/20—Controlling or monitoring the operation of devices; Data handling
    • G07D11/22—Means for sensing or detection
    • G07D11/235—Means for sensing or detection for monitoring or indicating operating conditions; for detecting malfunctions
    • G07D11/237—Means for sensing or detection for monitoring or indicating operating conditions; for detecting malfunctions for detecting transport malfunctions, e.g. jams or misfeeds
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D11/00—Devices accepting coins; Devices accepting, dispensing, sorting or counting valuable papers
    • G07D11/20—Controlling or monitoring the operation of devices; Data handling
    • G07D11/30—Tracking or tracing valuable papers or cassettes
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D13/00—Handling of coins or of valuable papers, characterised by a combination of mechanisms not covered by a single one of groups G07D1/00 - G07D11/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/52—Defective operating conditions
    • B65H2511/528—Jam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/80—Arangement of the sensing means
    • B65H2553/82—Arangement of the sensing means with regard to the direction of transport of the handled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/10—Ensuring correct operation
    • B65H2601/11—Clearing faulty handling, e.g. jams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/20—Avoiding or preventing undesirable effects
    • B65H2601/25—Damages to handled material
    • B65H2601/255—Jam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/1912—Banknotes, bills and cheques or the like

Definitions

  • the invention relates to a sheet medium conveying state monitoring technology, in particular to a card counting judgment system and method in the process of transporting banknotes in an ATM movement.
  • the banknote judgment standard of the banknote during transportation generally adopts a fixed threshold.
  • 101 is the transport direction of the banknotes
  • 102 is the banknote transport path
  • 103 and 104 are detection sensors placed on the banknote transport path
  • 105 It is the banknote to be transported
  • S is the distance between the sensor 103 and the sensor 104
  • L is the length of the banknote
  • D is the distance between the banknote front end and the sensor 104.
  • the fixed threshold is determined by the method: when the banknote blocks the sensor, the threshold of the banknote is K times the length of the longest banknote, and K is a constant; when the banknote does not block the sensor, the threshold of the banknote is the two sensors where the banknote is located K times the spacing or spacing between them.
  • the distance D between the front end of the banknote and the sensor 104 is greater than K times the length L of the longest banknote; when the card is generated between the sensors, the distance D between the front end of the banknote and the sensor 104 is greater than that of the two sensors 103 and 104
  • the longitudinal access device in the case of the longitudinal banknote transport process, when the channel card is judged to have a fixed threshold, since the length of the long side of the banknote is large, when the threshold is small, the banknote may be misjudged when the banknote is connected. Banknotes, reliability is reduced; in order to be compatible with the longest banknotes or banknotes, a large fixed threshold method will cause the card to judge the lag, the measurement accuracy is reduced, and even the channel is stuck or connected (two banknotes are connected end to end) Miscalculation of banknotes, etc.
  • the present invention provides a banknote card counting determination method, which introduces the actual measurement length of the banknote into the card counting judgment system, and changes the threshold of the card counting judgment in real time. Size, while improving measurement accuracy, guarantees reliability.
  • the invention also provides a banknote card counting determination system.
  • the feature information of the banknote collected by the sensor unit includes: the banknote length L and the banknote code N that can be directly recognized by the banknote card counting determination system, and the banknote denomination and other image feature information that are not directly recognizable by the banknote card counting determination system.
  • the banknote card judgment system further includes a banknote information processing unit for converting the banknote denomination and other image feature information that are not directly recognizable by the banknote card judgment system into a banknote length L and a banknote number that can be directly recognized by the system. N.
  • the method for judging the banknotes of the banknotes comprises: Step 1, arranging a plurality of sensors at a certain interval along the banknote conveying direction on the banknote conveying passage; and step 2, in the process of conveying the banknotes, the sensors independently detect the arrival of the banknotes or The state of leaving; step 3, a sensor Whether the banknote arrives, that is, whether the front end of the banknote triggers a certain sensor, if yes, proceeds to step 4, otherwise returns to step 2, wherein the certain sensor is defined as the current sensor; and step 4, the current sensor collects the characteristics of the banknote
  • k is a constant, and the value of k ranges from 1.1 to 2.
  • the k-value determining factors include the speed stability of the banknote conveying passage and the length L of the banknote, wherein the speed of the banknote conveying passage is more stable. The smaller the k value, the larger the banknote length L, and the smaller the K value.
  • each of the sensor positions independently runs the banknote card counting determination method.
  • the sensors sequentially operate the banknote banknote determination method in the direction in which the banknotes are transported, and perform a determination as to whether the banknote is banknoted.
  • M is the threshold for card counting
  • L is the length of the banknote
  • L is based on
  • S is the distance between two adjacent sensors
  • S is different depending on the position of the sensor
  • M is a function of L and S, and its value varies depending on L and/or S.
  • the banknote card counting determination system comprises a card counting threshold calculating unit, which can calculate the threshold according to the actual length of the banknote and the actual distance between the sensors. Therefore, when the card counting determining unit performs the card counting judgment, the threshold value is calculated by using the real-time calculation threshold. Judging, therefore, can improve measurement accuracy and ensure reliability.
  • FIG. 1 is a structural block diagram of a card counting determination system according to a first embodiment of the present invention
  • FIG. 2 is a structural block diagram of a card counting determination system according to a second embodiment of the present invention.
  • FIG. 3 is a flow chart of a method for judging a banknote according to a preferred embodiment of the present invention.
  • Figure 4 is a side view of a simplified banknote transport system
  • Figure 5 is a plan view of a simplified banknote transport system
  • Figure 6 is a state diagram of the current sensor starting from the front end of the bill
  • Figure 7 is a state diagram when the banknote covers the current sensor
  • Figure 8 is a state diagram of the tail end of the banknote leaving the current sensor
  • Figure 9 is a state diagram when the banknote leaves the current sensor and does not trigger the next sensor
  • Fig. 10 is a view showing a state in which the front end of the bill is triggered by the next sensor.
  • a banknote card judgment system includes a sensor unit 101 and a banknote.
  • the information storage unit 102 includes a billing threshold calculation unit 103, and a billing state judging unit 104.
  • the sensor unit 101 includes a plurality of sensors arranged on the banknote transport path at intervals in the banknote transport direction, and the sensors are used for independently detecting whether or not a banknote arrives or leaves, and collecting feature information of the arrived banknotes, and measuring the The distance of the leading end of the arriving banknote relative to itself until the front end of the banknote reaches the next sensor.
  • the characteristic information of the banknote collected by the sensor includes the banknote length L and the banknote code N that can be directly recognized by the banknote card counting determination system, and the banknote denomination and other image feature information that are not directly recognizable by the banknote card counting determination system.
  • the banknote card-banking system further requires a banknote information processing unit 105.
  • the banknote information processing unit 105 is used to collect the banknote feature information collected by the sensor unit 101. It is converted into the banknote length L and the banknote number N so that the banknote length L and the banknote code N are stored in the banknote information storage unit 102 in a one-to-one correspondence.
  • the banknote information storage unit 102 is for storing data such as the length L and the number N of the banknote and the distance between the adjacent two sensors in a one-to-one correspondence.
  • the banknote length and number signal collected by the sensor unit 101 can be directly stored in the banknote information storage unit 102.
  • the banknote information processing unit 105 processes the banknote information processing unit 105 and converts it into a banknote length L and
  • the banknote number N is stored in the banknote information storage unit 102 in a one-to-one correspondence.
  • the billing threshold calculating unit 103 is configured to calculate the billing threshold M in real time.
  • the speed stability of the banknote conveying passage and the length L of the banknote are included, wherein the more stable the banknote conveying passage speed is, the smaller the k value is, the larger the banknote length L is, the smaller the K value is; the S is between a certain sensor and the next sensor.
  • the banknote length L and the distance S between the two adjacent sensors are acquired by the sensor in real time and transferred to the banknote information storage unit 102, and then the banknote threshold calculation unit 103 receives the banknote information storage unit 102 from the banknote information storage unit 102. Get in.
  • the measurement unit 1 is variable, so the distance S between the two adjacent sensors is not set to an actual fixed value or a calculated fixed value in the banknote card judgment method provided in this embodiment, but needs to pass Calculated, in the embodiment, the current sensor determines the length measurement unit according to the real-time speed of the banknote transport channel and calculates the real-time distance between the current sensor and the next sensor according to the current sensor and the number of the next sensor and transfers the banknote to the banknote
  • the one-card state determination unit 104 is configured to determine whether the distance D of the front end of the current banknote relative to the current sensor is greater than the current card threshold M, and if so, determine the card state, and if not, determine that there is no card.
  • the specific flow of the banknote card counting determination method provided by a preferred embodiment of the present invention is described below with reference to FIG.
  • the method for judging the card includes:
  • Step 1 Arranging a plurality of sensors at a certain interval along the banknote conveying direction on the banknote conveying passage;
  • Step 2 during the process of transporting the banknotes, the sensors independently detect the state in which the banknotes arrive or leave;
  • Step 3 A sensor determines whether a banknote arrives, that is, determines whether a front end of the banknote triggers a certain sensor, and if yes, proceeds to step 4, otherwise returns to step 2, wherein the certain sensor is defined as a current sensor;
  • Step 5 measuring the distance D of the front end of the banknote relative to the current sensor
  • Step 7 the current sensor determines whether the banknote leaves, that is, whether the tail end of the banknote leaves the current sensor, and if so, proceeds to step 8, and if not, returns to step 5;
  • Step 9 measuring the distance D of the front end of the banknote relative to the current sensor
  • Step 11 it is determined whether the front end of the banknote triggers the next sensor of the current sensor along the banknote transport direction, and if so, proceeds to step 12, and if not, returns to step 9;
  • Step 12 the banknotes are conveyed smoothly, no banknotes are collected, the banknotes are conveyed, and the banknotes of the next sensor position are determined;
  • Step 13 the banknotes are banknotes, and the banknotes are stopped;
  • step 14 the banknote judgment of the current sensor position is ended.
  • the banknote threshold M k *(SL)+L. Since the banknote length L is different for different banknotes, the distance S between adjacent sensors is also different depending on the sensor, so the banknote threshold M is a dynamically changing value, which is obtained according to the actually measured banknote length and sensor distance. The value, therefore, has a more practical meaning when judging the banknote, and can improve the accuracy and reliability of the judgment.
  • FIG. 4 a simplified diagram of the banknote transport system, expressing the banknote transport channel 102 and sensors 104 and 103 which are sequentially arranged in the bill transport direction 101 (indicated by an arrow), the bills 105 are transported.
  • FIG. 5 it is a simplified plan view of the banknote transport system, and the banknote transport path 102, the distance S between the sensors 104 and 103, and the length L of the banknote 105 are more clearly expressed.
  • the front end of the banknote 105 triggers the current sensor 104.
  • the sensor 104 collects the feature information of the banknote 105, and obtains the banknote code and length information.
  • the banknote 105 As shown in FIG. 7, as the banknote 105 advances in the conveying direction, the banknote 105 gradually covers the sensor 104, and the sensor 104 continuously collects the distance D from the front end of the banknote 105 from the sensor 104.
  • the banknote determination method is updated to the judgment of the banknote 105 with respect to the sensor 103, and proceeds to step 3 of the method flow.
  • the banknote determination process of the banknote 105 with respect to the sensor 103 is continued.
  • the complete process of determining the banknote of the banknote 105 with respect to the sensor ends, and this process is sequentially performed in the order in which the sensors are disposed, which is a serial process.
  • the banknote 105 when the banknote 105 performs the banknote determination with respect to the sensor 104, the banknote determination of the other banknotes relative to the sensor 104 may occur, and the banknote 105 may perform the banknote determination process with respect to the other sensors. They are performed simultaneously and independently, and there is a billing threshold M relative to the respective bill number and a distance D with respect to the respective sensors, which do not interfere with each other. That is, the banknote length L in the banknote threshold formula is changed with respect to the banknote, and the adjacent sensor distance D is changed with respect to the sensor.
  • banknote judgment of other banknotes may be performed separately from other sensors, and they are also independently performed, that is, the D in the banknote threshold formula is changed with respect to the sensor, and the transport channel The location of the sensor's physical placement.
  • the change of the banknote threshold varies with the banknote serial number (including the length information) and the sensor serial number, and the card threshold is changed in real time; and the D value in the card judgment formula is also bound to the banknote serial number and the sensor serial number, which is specific.
  • the card counting determination method is a dynamic card counting judgment technique with a change threshold of the banknote and the sensor.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)

Abstract

一种纸币卡钞判断系统及方法，判断系统包括一传感器单元（101）、一纸币信息存储单元（102）、一卡钞阈值计算单元（103）以及一卡钞状态判断单元（104）。卡钞阈值计算单元（103）能根据纸币的实际长度（L）和传感器之间的实际距离（S）计算阈值（M），卡钞状态判断单元（104）进行卡钞判断时，是利用实时计算的阈值（M）进行判断的，因此该卡钞判断系统和方法是一种随纸币和传感器变化阈值（M）的动态卡钞判断技术，能提升测量精度，保证可靠性。

Description

纸币卡钞判断系统及方法
本申请要求2014年07月16日提交中国专利局、申请号为201410339527.7、发明名称为“纸币卡钞判断系统及方法”的发明专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及一种薄片类介质输送状态监控技术，尤其涉及一种纸币在ATM机芯内运送过程中的卡钞判断系统和方法。
背景技术
现有技术中，纸币在运送过程中的卡钞判断标准一般采用固定阈值。如图4、图5和图6所示，在一个简化的纸币运送系统中，101是纸币的运送方向，102是纸币运送通道，103和104是布放在纸币运送通道上的检测传感器，105是被运送的纸币，S是传感器103和传感器104之间的间距，L是纸币的长度，D是纸币前端相对传感器104之间的距离。固定阈值的卡钞判断方式是：当纸币遮挡住传感器上时，卡钞阈值为最长纸币长度的K倍，K是常数；当纸币未遮挡传感器时，卡钞阈值是纸币所处两个传感器之间的间距或者间距的K倍。当卡钞发生在传感器上时，纸币前端与传感器104的距离D大于K倍最长纸币长度L；卡钞发生传感器之间时，纸币前端与传感器104的间距D大于两个传感器103与104的间距S或该间距S的K倍，即108>K*106。因此在纵向存取设备中，在纵向纸币运送过程中，通道卡钞判断采用固定阈值的情况下，由于纸币长边长度差距较大，当阈值偏小时，纸币连钞时极可能误判成卡钞，可靠性降低；为了兼容最长纸币或连钞情况，较大的固定阈值的方式会导致卡钞判断滞后，测量精度降低，甚至导致通道卡死或连钞(两张纸币首尾相连)卡钞误判等情况。
因此，提供一种保证可靠性且提升测量精度的卡钞判断方法非常必要。
发明内容
为了解决现有技术中纸币卡钞判断方法可靠性低和测量精度低的问题，本发明提供一种纸币卡钞判断方法，将纸币实际测量长度引入卡钞判断系统，实时改变卡钞判断的阈值大小，在提升测量精度的同时，保证可靠性。
本发明还提供一种纸币卡钞判断系统。
本发明提供的纸币卡钞判断系统，包括：一传感器单元，包括多个沿纸币输送方向以一定间隔布置在纸币输送通道上的传感器，该些传感器用于独立检测是否有纸币到达或离开，并采集所到达的纸币的特征信息，且测量该到达的纸币的前端相对于其自身的距离，直至该纸币前端到达下一个传感器为止；一纸币信息存储单元，用于一一对应地存储纸币的长度L和编号N和每相邻两个传感器之间的距离S；一卡钞阈值计算单元，用于实时计算卡钞阈值M，在该纸币前端到达某一传感器至该纸币尾端离开该传感器的过程中，该卡钞阈值M＝k*L，在该纸币尾端离开该传感器至该纸币前端到达下一个传感器的过程中，该卡钞阈值M＝k*(S-L)+L，其中k为常数，S为某一传感器与其下一传感器之间的距离；以及一卡钞状态判断单元，用于判断当前纸币的前端相对于当前传感器的距离D是否大于当前卡钞阈值M，如果是，则判断为卡钞状态，如果否，则判断为没有卡钞。
具体的，该传感器单元采集的纸币的特征信息包括：该纸币卡钞判断系统可直接识别的纸币长度L和纸币编码N以及该纸币卡钞判断系统不可直接识别的纸币面额和其他图像特征信息。
优选的，该纸币卡钞判断系统还包括一纸币信息处理单元，用于将该纸币卡钞判断系统不可直接识别的纸币面额和其他图像特征信息转换成系统可直接识别的纸币长度L和纸币编号N。
本发明提供的一种纸币卡钞判断方法，包括：步骤1，在纸币输送通道上沿纸币输送方向以一定间隔布置多个传感器；步骤2，纸币输送过程中，该些传感器独立检测纸币到达或离开的状态；步骤3，某一传感器判 断是否有纸币到达，即判断纸币前端是否触发某一传感器，如果是，进入步骤4，否则返回步骤2，其中，该某一传感器定义为当前传感器；步骤4，该当前传感器采集该纸币的特征信息，该卡钞阈值计算单元根据该纸币的特征信息从纸币信息存储单元中获得该纸币的长度L，并根据该纸币长度L计算该卡钞阈值M，M＝k*L，其中k为常数；步骤5，测量该纸币前端相对于该当前传感器的距离D；步骤6，判断该纸币前端相对于该当前传感器的距离D是否大于该卡钞阈值M，M＝k*L；如果是，则进入步骤13，如果否，则进入步骤7；步骤7，该当前传感器判断该纸币是否离开，即该纸币尾端是否离开该当前传感器，如果是，则进入步骤8，如果否，则返回步骤5；步骤8，该当前传感器获取其与下一传感器之间的距离S，该卡钞阈值计算单元重新计算卡钞阈值M，M＝k*(S-L)+L，其中k为常数；步骤9，测量该纸币前端相对于该当前传感器的距离D；步骤10，判断该纸币前端相对于该当前传感器的距离D是否大于该卡钞阈值M，M＝k*(S-L)+L；如果是，则进入步骤13，如果否，则进入步骤11；步骤11，判断该纸币前端是否触发该当前传感器沿纸币输送方向的下一个传感器，如果是，则进入步骤12，如果否，则返回步骤9；步骤12，纸币输送流畅，不卡钞，继续纸币输送，且启动下一个传感器位置的卡钞判断；步骤13，纸币卡钞，停止纸币输送；以及步骤14，结束当前传感器位置的卡钞判断。其中步骤4和步骤8中，k为常数，k的取值范围在1.1～2之间，k值决定因素包括纸币输送通道的速度稳定性和纸币的长度L，其中纸币输送通道速度越稳定，k值越小，纸币长度L越大，K值越小。
其中，每一个传感器位置独立运行该纸币卡钞判断方法。
而且，同一张纸币被输送过程中，该些传感器沿纸币输送的方向依次运行该纸币卡钞判断方法，执行对该张纸币是否被卡钞的判断。
优选的，步骤6和步骤10中，判断纸币是否卡钞的通用公式为D>M＝f(L,S)；其中，D是纸币前端相对于当前传感器的距离，D随着纸币输送的运动过程不断变化，M是卡钞判断阈值，L是纸币的长度，L根据 纸币种类不同而不同，S是相邻两个传感器之间的距离，S根据传感器位置不同而不同，M是关于L与S的函数，其取值根据L和/或S的不同而变化。
本发明提供的纸币卡钞判断系统包含卡钞阈值计算单元，能根据纸币的实际长度和传感器之间的实际距离计算阈值，因此卡钞判断单元进行卡钞判断时，是利用实时计算的阈值进行判断的，因此能提升测量精度，保证可靠性。
附图说明
图1是本发明第一实施例提供的卡钞判断系统结构模块图；
图2是本发明第二实施例提供的卡钞判断系统结构模块图；
图3是本发明一较佳实施例提供的卡钞判断方法流程图；
图4是一个简化的纸币运送系统侧视图；
图5是一个简化的纸币运送系统俯视图；
图6是纸币前端出发当前传感器的状态图；
图7是纸币覆盖当前传感器时的状态图；
图8是纸币尾端离开当前传感器的状态图；
图9是纸币离开当前传感器后未触发下一个传感器时的状态图；
图10是纸币前端触发下一个传感器时的状态图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
如图1所示，一种纸币卡钞判断系统包括一传感器单元101、一纸币 信息存储单元102、一卡钞阈值计算单元103以及一卡钞状态判断单元104。
该传感器单元101包括多个沿纸币输送方向以一定间隔布置在纸币输送通道上的传感器，该些传感器用于独立检测是否有纸币到达或离开，并采集所到达的纸币的特征信息，且测量该到达的纸币的前端相对于其自身的距离，直至该纸币前端到达下一个传感器为止。其中该传感器采集的纸币的特征信息包括该纸币卡钞判断系统可直接识别的纸币长度L和纸币编码N以及该纸币卡钞判断系统不可直接识别的纸币面额和其他图像特征信息。当纸币的特征信息不是纸币长度和纸币编码时，该纸币卡钞系统还需要一个纸币信息处理单元105，如图2所示，该纸币信息处理单元105用于将传感器单元101采集的纸币特征信息转化成纸币长度L和纸币编号N，以便纸币长度L和纸币编码N一一对应地存储于纸币信息存储单元102中。
该纸币信息存储单元102用于一一对应地存储纸币的长度L和编号N以及相邻两传感器之间的距离等数据。该传感器单元101采集的纸币长度和编号信号可以直接存储至该纸币信息存储单元102，当纸币特征信息为面额或者其他特征图像时，则经由该纸币信息处理单元105处理后转化成纸币长度L和纸币编号N，再一一对应地存储于纸币信息存储单元102中。
该卡钞阈值计算单元103用于实时计算卡钞阈值M，在纸币前端到达当前传感器至该纸币尾端离开该传感器的过程中，该卡钞阈值M＝k*L，在该纸币尾端离开该传感器至该纸币前端到达下一个传感器的过程中，该卡钞阈值M＝k*(S-L)+L，其中k为常数，k的取值范围一般在1.1～2之间，k值决定因素包括纸币输送通道的速度稳定性和纸币的长度L，其中纸币输送通道速度越稳定，k值越小，纸币长度L越大，K值越小；S为某一传感器与其下一传感器之间的距离。其中纸币长度L与该相邻两个传感器之间的距离S均由该传感器实时获取并转存至该纸币信息存储单元102中，然后由该卡钞阈值计算单元103从该纸币信息存储单元102中获取。
需要说明的是，在实际的纸币传输系统中，多个传感器沿纸币输送方 向依次排列，传感器位置是固定的，因此相邻两个传感器之间的距离S是固定值，但是在软件处理纸币输送的过程中，纸币长度L和卡钞阈值M都不是以实际单位1为计量标准计量的，而是以单位时间内纸币的传输距离为单位1或者直接以一定的单位位移为单位1计量的，因此一般情况下，为了保证软件的可维护性和在不同纸币输送通道速度下，计量单位1是可变的，因此相邻两个传感器之间的距离S在本实施例提供的纸币卡钞判断方法中没有设置成实际的固定值或者计算的固定值，而是需要通过计算获得，本实施例中，该当前传感器根据纸币输送通道实时速度确定长度计量单位且根据当前传感器与下一个传感器的编号计算当前传感器与下一传感器之间的实时距离并将其转存至纸币信息存储单元102中，阈值计算单元103从该纸币信息存储单元102中获取该距离S以实时计算卡钞阈值。
该一卡钞状态判断单元104用于判断当前纸币的前端相对于当前传感器的距离D是否大于当前卡钞阈值M，如果是，则判断为卡钞状态，如果否，则判断为没有卡钞。
以下结合图3介绍本发明一较佳实施例提供的纸币卡钞判断方法的具体流程。该卡钞判断方法包括：
步骤1，在纸币输送通道上沿纸币输送方向以一定间隔布置多个传感器；
步骤2，纸币输送过程中，该些传感器独立检测纸币到达或离开的状态；
步骤3，某一传感器判断是否有纸币到达，即判断纸币前端是否触发某一传感器，如果是，进入步骤4，否则返回步骤2，其中，该某一传感器定义为当前传感器；
步骤4，该当前传感器采集该纸币的特征信息，该卡钞阈值计算单元根据该纸币的特征信息从纸币信息存储单元中获得该纸币的长度L，并根据该纸币长度L计算该卡钞阈值M，M＝k*L，其中k为常数；
步骤5，测量该纸币前端相对于该当前传感器的距离D；
步骤6，判断该纸币前端相对于该当前传感器的距离D是否大于该卡钞阈值M，M＝k*L；如果是，则进入步骤13，如果否，则进入步骤7；
步骤7，该当前传感器判断该纸币是否离开，即该纸币尾端是否离开该当前传感器，如果是，则进入步骤8，如果否，则返回步骤5；
步骤8，该当前传感器获取其与下一传感器之间的距离S，该卡钞阈值计算单元重新计算卡钞阈值M，M＝k*(S-L)+L，其中k为常数；
步骤9，测量该纸币前端相对于该当前传感器的距离D；
步骤10，判断该纸币前端相对于该当前传感器的距离D是否大于该卡钞阈值M，M＝k*(S-L)+L；如果是，则进入步骤13，如果否，则进入步骤11；
步骤11，判断该纸币前端是否触发该当前传感器沿纸币输送方向的下一个传感器，如果是，则进入步骤12，如果否，则返回步骤9；
步骤12，纸币输送流畅，不卡钞，继续纸币输送，且启动下一个传感器位置的卡钞判断；
步骤13，纸币卡钞，停止纸币输送；
步骤14，结束当前传感器位置的卡钞判断。
其中，从步骤4至步骤7的过程，是纸币开始触发当前传感器至离开该当前传感器的过程，也就是纸币遮挡该当前传感器的过程，在该过程中，卡钞阈值M＝k*L，直至步骤8，纸币离开当前传感器，从步骤8至步骤11的过程，是纸币离开当前传感器至触发下一个传感器的过程，也就是纸币不遮挡当前传感器的过程，该过程中，卡钞阈值M＝k*(S-L)+L。由于纸币长度L因不同纸币而不同，相邻传感器之间的距离S也因为传感器的不同而不同，所以卡钞阈值M是一个动态变化的值，是根据实际测量的纸币长度以及传感器距离而得到的值，因此判断卡钞的时候具有更加实际的意义，能提高判断的精度和可靠度。
以下结合图4～图10举例介绍该卡钞判断过程：
如图4所示，一个简化的纸币运送系统示意图，表达了纸币输送通道 102以及沿纸币输送方向101(箭头表示)依次布置的传感器104和103，纸币105被输送。
如图5所示，是简化的纸币运送系统俯视图，更清楚地表达了纸币输送通道102、传感器104和103之间的距离S以及纸币105的长度L。
如图6所示，纸币105的前端触发当前传感器104，此时传感器104采集纸币105的特征信息，获得纸币编码和长度信息，卡钞阈值计算单元根据纸币长度L计算卡钞阈值M，M＝k*L。
如图7所示，随着纸币105沿输送方向前进，纸币105逐渐覆盖该传感器104，传感器104不断采集纸币105前端距离传感器104的距离D，卡钞判断单元104不断比较D是否大于M，M＝k*L。如果D>M，则出现卡钞，结束卡钞判断，停止后续纸币输送。如果D不大于卡钞阈值M，则纸币105继续被输送，直至如图8所示，纸币105尾部完全离开该传感器104的时刻，纸币105进入未遮挡该传感器104的状态，卡钞阈值计算单元103重新计算卡钞阈值M，M＝k*(S-L)+L。
如图9所示，在纸币105不断被输送，纸币105前端至传感器104的距离D不断增大，传感器104不断采集纸币105前端距离传感器104的距离D，卡钞判断单元104不断比较D是否大于M，M＝k*(S-L)+L。如果D>M，则出现卡钞，结束卡钞判断，停止后续纸币输送。如果D不大于卡钞阈值M，则纸币105继续被输送，直至如图10所示，纸币105前端触发下一个传感器103，则停止相对传感器104位置的卡钞判断，而从头开始相对传感器103位置处的卡钞判断。
也就是说，当纸币105进入传感器103时，纸币105前端触发传感器103，卡钞判断方法更新为纸币105相对于传感器103的判断，且进入了方法流程的步骤3。继续进行纸币105相对传感器103的卡钞判断过程。当纸币105通过全部纸币输送通道102时，纸币105相对传感器的卡钞判断的完整过程结束，而且这个过程是相对传感器的布放顺序依次进行的，是一个串行过程。
另外，当纸币105进行相对传感器104卡钞判断时，既可能发生其他纸币相对传感器104的卡钞判断，也可能发生纸币105进行相对其他传感器的卡钞判断过程。它们是同时且独立进行的，存在相对各自对应纸币序号的卡钞阈值M和相对各自传感器的距离D，互不干扰。即卡钞阈值公式中的纸币长度L是相对纸币变化的，相邻传感器距离D是相对传感器变化的。进一步说，当纸币105相对传感器104卡钞判断时，可能发生其他纸币相对其他传感器的卡钞判断，它们也是独立进行的，即卡钞阈值公式中的D是相对传感器变化的，与运送通道的传感器物理布放位置有关。
所以卡钞阈值的变化随钞票序号(包含长度信息)和传感器序号变化，该卡钞阈值是实时变化的；而卡钞判断公式中D值也与钞票序号和传感器序号绑定，是特定的哪一张钞票与哪一个传感器之间的距离。卡钞判断公式可以变更为通用公式D>M＝f(L,S)；其中，D是纸币前端相对于当前传感器的距离，D随着纸币输送的运动过程不断变化，M是卡钞判断阈值，L是纸币的长度，L根据纸币种类不同而不同，S是相邻两个传感器之间的距离，S根据传感器位置不同而不同，M是关于L与S的函数，其取值根据L和/或S的不同而变化。总之，本实施例提供的的卡钞判断方法是一个随纸币和传感器变化阈值的动态卡钞判断技术。
惟以上所述仅为本发明的较佳实施例，非意欲局限本发明的专利保护范围，故举凡运用本发明说明书及图式内容所为的等效变化，均同理皆包含于本发明的权利保护范围内，合予陈明。

Claims (10)

  1. 一种纸币卡钞判断系统，包括：
    一传感器单元，包括多个沿纸币输送方向以一定间隔布置在纸币输送通道上的传感器，该些传感器用于独立检测是否有纸币到达或离开，并采集所到达的纸币的特征信息，且测量该到达的纸币的前端相对于其自身的距离，直至该纸币前端到达下一个传感器为止；
    一纸币信息存储单元，用于一一对应地存储纸币的长度L和编号N和相邻每两个传感器之间的距离S；
    一卡钞阈值计算单元，用于实时计算卡钞阈值M，在该纸币前端到达某一传感器至该纸币尾端离开该传感器的过程中，该卡钞阈值M＝k*L，在该纸币尾端离开该传感器至该纸币前端到达下一个传感器的过程中，该卡钞阈值M＝k*(S-L)+L，其中k为常数，S为某一传感器与其下一传感器之间的距离；
    一卡钞状态判断单元，用于判断当前纸币的前端相对于当前传感器的距离D是否大于当前卡钞阈值M，如果是，则判断为卡钞状态，如果否，则判断为没有卡钞。
  2. 如权利要求1所述的纸币卡钞判断系统，其特征在于，该传感器单元采集的纸币的特征信息包括：该纸币卡钞判断系统可直接识别的纸币长度L和纸币编码N以及该纸币卡钞判断系统不可直接识别的纸币面额和其他图像特征信息。
  3. 如权利要求2所述的纸币卡钞判断系统，其特征在于，该纸币卡钞判断系统还包括一纸币信息处理单元，用于将该纸币卡钞判断系统不可直接识别的纸币面额和其他图像特征信息转换成系统可直接识别的纸币长度L和纸币编号N。
  4. 如权利要求1所述的纸币卡钞判断系统，其特征在于，卡钞阈值计算公式中k的取值范围在1.1～2之间，k值决定因素包括纸币输送通道的速度稳定性和纸币的长度L，其中纸币输送通道速度越稳定，k值越小， 纸币长度L越大，K值越小。
  5. 一种纸币卡钞判断方法，包括：
    步骤1，在纸币输送通道上沿纸币输送方向以一定间隔布置多个传感器；
    步骤2，纸币输送过程中，该些传感器独立检测纸币到达或离开的状态；
    步骤3，某一传感器判断是否有纸币到达，即判断纸币前端是否触发某一传感器，如果是，进入步骤4，否则返回步骤2，其中，该某一传感器定义为当前传感器；
    步骤4，该当前传感器采集该纸币的特征信息，该卡钞阈值计算单元根据该纸币的特征信息从纸币信息存储单元中获得该纸币的长度L，并根据该纸币长度L计算该卡钞阈值M，M＝k*L；
    步骤5，测量该纸币前端相对于该当前传感器的距离D；
    步骤6，判断该纸币前端相对于该当前传感器的距离D是否大于该卡钞阈值M，M＝k*L；如果是，则进入步骤13，如果否，则进入步骤7；
    步骤7，该当前传感器判断该纸币是否离开，即该纸币尾端是否离开该当前传感器，如果是，则进入步骤8，如果否，则返回步骤5；
    步骤8，该当前传感器获取其与下一传感器之间的距离S，该卡钞阈值计算单元重新计算卡钞阈值M，M＝k*(S-L)+L；
    步骤9，测量该纸币前端相对于该当前传感器的距离D；
    步骤10，判断该纸币前端相对于该当前传感器的距离D是否大于该卡钞阈值M，M＝k*(S-L)+L；如果是，则进入步骤13，如果否，则进入步骤11；
    步骤11，判断该纸币前端是否触发该当前传感器沿纸币输送方向的下一个传感器，如果是，则进入步骤12，如果否，则返回步骤9；
    步骤12，纸币输送流畅，不卡钞，继续纸币输送，且启动下一个传感器位置的卡钞判断；
    步骤13，纸币卡钞，停止纸币输送；
    步骤14，结束当前传感器位置的卡钞判断。
  6. 如权利要求5所述的纸币卡钞判断方法，其特征在于，每一个传感器位置独立运行该纸币卡钞判断方法。
  7. 如权利要求5所述的纸币卡钞判断方法，其特征在于，同一张纸币被输送过程中，该些传感器沿纸币输送的方向依次运行该纸币卡钞判断方法，执行对该张纸币是否被卡钞的判断。
  8. 如权利要求5所述的纸币卡钞判断方法，其特征在于，步骤4中，k为常数，k的取值范围在1.1～2之间，k值决定因素包括纸币输送通道的速度稳定性和纸币的长度L，其中纸币输送通道速度越稳定，k值越小，纸币长度L越大，K值越小。
  9. 如权利要求5所述的纸币卡钞判断方法，其特征在于，步骤8中，k为常数，k的取值范围在1.1～2之间，k值决定因素包括纸币输送通道的速度稳定性和纸币的长度L，其中纸币输送通道速度越稳定，k值越小，纸币长度L越大，K值越小。
  10. 如权利要求5所述的纸币卡钞判断方法，其特征在于，步骤6和步骤10中，判断纸币是否卡钞的通用公式为D>M＝f(L,S)；其中，D是纸币前端相对于当前传感器的距离，D随着纸币输送的运动过程不断变化，M是卡钞判断阈值，L是纸币的长度，L根据纸币种类不同而不同，S是相邻两个传感器之间的距离，S根据传感器位置不同而不同，M是关于L与S的函数，其取值根据L和/或S的不同而变化。
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