JP2008120526A - Sheetlike member conveying device, sheetlike member conveying method, and program for executing the method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheetlike member conveying device improving accuracy of double feed detection. <P>SOLUTION: This sheetlike member conveying device 101 is provided with a control means 102, an ultrasonic wave transmitting means 103, an ultrasonic wave receiving means 104, and an operation part 105. The control means 102 has a control adjustment means 102D, an ultrasonic wave double feed detection circuit 102E, and a coordinate input circuit 102F. The ultrasonic wave double feed detection circuit 102E detects double feed by controlling the ultrasonic wave transmitting means 103 and ultrasonic wave receiving means 104. The coordinate input circuit 102F detects input operation by pressurization of an operator through the operation part 105. The control adjustment means 102D adjusts ultrasonic wave double feed detecting operation and coordinate detecting operation so as to avoid interference of the ultrasonic wave double feed detecting operation by the ultrasonic wave double feed detection circuit 102E with the coordinate detecting operation by the coordinate input circuit 102F. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an apparatus having a function of mounting a plurality of sheet-like members and separating and conveying the sheet-like members one by one, and in particular, using an ultrasonic sensor, two or more sheet-like members are stacked. The present invention relates to a sheet-like member conveyance device provided with double-feed detection means for detecting double-feeds that are conveyed as they are, a sheet-like member conveyance method, and a program for executing the method.

  2. Description of the Related Art Conventionally, devices such as scanners, printers, copiers, printing machines, and ATM (Automated Teller Machine) have a mechanism for separating and conveying sheet-like members one by one. However, there may be a possibility that a double feed is performed in which only one sheet-like member is conveyed while a part or the whole of two or more sheet-like members are overlapped. For this reason, the conveyance apparatus which conveys a sheet-like member needs the function to detect double feeding of a sheet-like member.

  Also, in devices such as scanners, printers, copiers, printing machines, ATMs (Automated Teller Machine), etc., a touch panel arranged in the operation unit as an input means from the device user, a sheet-like member is fed by the user to the sheet feeding port. A sheet-like member detecting device such as a photo interrupter for detecting whether or not the sheet-like member has passed a specific position in the transport path, Communication means or the like for transmitting the feed detection information, the coordinate information of the touch panel or the detection information of the sheet-like member detection device to other control means or receiving a set value from the other control means is required.

  Hereinafter, a sheet-like member conveying apparatus having a sheet-like member double feed detection function will be described.

  FIG. 13 is a block diagram schematically showing a conventional sheet-like member conveyance device using ultrasonic waves.

  In FIG. 13, a sheet feeding apparatus 1000 as a conventional sheet-like member conveying apparatus includes a control unit 1001, an operation unit 1002, a display unit 1003, a sheet feeding unit 1004, a sheet detection sensor 1005, a conveyance unit 1006, and a double feed detection unit 1007. And switching means 1008.

  The control unit 1001 includes a CPU 1001A, a ROM 1001B, and a RAM 1001C, and controls the overall operation of the sheet feeding device 1000.

  The control unit 1001 controls the transport unit 1006 based on the double feed detection information obtained by controlling the double feed detection unit 1007.

  The operation unit 1002 is configured by input means such as a touch panel, and functions as an interface for interacting with the operator. The operation unit 1002 outputs operation information to the control unit 1001.

  The control unit 1001 can change the double feed detection threshold of the double feed detection unit 1007 based on the paper type information of the paper input by the operator to the operation unit 1002, and can also switch on / off the double feed detection. It is.

  FIG. 14 is a diagram showing the configuration of the double feed detection means 1007 in FIG.

In FIG. 14, the double feed detection unit 1007 includes a transmission circuit 1102, a transmitter 1103, a receiver 1104, a reception circuit 1105, and a storage unit 1106. The transmission circuit 1102 includes an oscillation circuit that generates a predetermined frequency signal and a power amplification circuit. An output signal of the transmission circuit 1102 is input to the transmitter 1103, and the transmitter 1103 converts the electrical signal into ultrasonic vibration energy and transmits the ultrasonic vibration energy to the receiver 1104. The receiving circuit 1105 receives an ultrasonic wave reception signal that the receiver 1104 receives an ultrasonic wave, converts it into an electric signal, and outputs it. The amplifier circuit amplifies the ultrasonic wave reception signal, and the amplified ultrasonic wave reception signal. And a reference circuit and a comparison circuit, and an output circuit. As the storage unit 1106, a RAM connected to the control unit 1101 is used (for example, see Patent Document 1).
JP 2006-211892 A

  However, in the double feed detection means as described above, a very weak ultrasonic reception signal obtained by the receiver is amplified by the amplification circuit, so that the power supplied to the reception circuit, a minute change in ground, other circuits The noise signal generated by the switching, the control circuit of the high voltage unit, the electromagnetic field generation circuit, etc. interferes with the ultrasonic reception signal, and adversely affects the S / N ratio of the ultrasonic reception signal.

  In order to solve this problem, it is necessary to separate the ultrasonic reception circuit from other signal processing circuits and incorporate it into the apparatus as a separate substrate so as not to adversely affect the S / N ratio of the ultrasonic reception signal.

  Alternatively, even if the ultrasonic receiving circuit is formed on the same substrate as other signal processing circuits, it is necessary to avoid interference of signals by separating the power supply and ground patterns to be supplied. In addition, in order to avoid noise signal wraparound (intrusion), it is necessary to arrange a noise filter in the amplifier circuit.

  However, as described above, the noise signal can be completely removed by the configuration in which the ultrasonic receiving circuit is separated from other signal processing circuits and incorporated in the apparatus as a separate substrate, or the power supply to be supplied or the ground pattern is separated. It cannot be avoided.

  On the other hand, if the ultrasonic receiving circuit is configured without considering the above problem, there is a problem that the S / N ratio of the ultrasonic reception signal is lowered, leading to a reduction in the accuracy of double feed detection of the sheet-like member conveying apparatus.

  An object of the present invention is to provide a sheet-like member conveyance device, a sheet-like member conveyance method, and a program for executing the method that can improve the accuracy of double feed detection.

  In order to achieve the above object, an image reading apparatus according to claim 1 is a sheet-like member conveying device for conveying a sheet-like member, and an ultrasonic wave transmitting means and an ultrasonic wave arranged across the conveyance path of the sheet-like member. And receiving the ultrasonic waves transmitted from the ultrasonic transmission means and receiving the ultrasonic waves transmitted through the sheet-like member, based on the ultrasonic reception signal output from the ultrasonic reception means, And at least one of other detection means and communication means in the sheet-like member conveying apparatus, and the ultrasonic double feed detection means is different from the ultrasonic multifeed detection means. The multifeed detection operation, the other detection operation, and the transmission / reception operation so as to avoid interference between the transmission detection operation and at least one of the detection operation of the other detection unit and the transmission / reception operation of the communication unit. And a controlling arbitration means for arbitrating at least one of.

  According to the present invention, the control arbitration unit avoids interference between the double feed detection operation of the ultrasonic double feed detection unit and at least one of the detection operation of the other detection unit and the transmission / reception operation of the communication unit. Since the feed detection operation and at least one of the other detection operations and the transmission / reception operation are arbitrated, the accuracy of double feed detection can be improved.

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

  FIG. 1 is a block diagram schematically showing a configuration of a sheet-like member conveyance device according to a first embodiment of the present invention.

  In FIG. 1, a sheet-like member conveying apparatus 101 includes a control unit 102, an ultrasonic transmission unit 103, an ultrasonic reception unit 104, and an operation unit 105 (instruction input unit).

  The control means 102 includes a CPU 102A, ROM 102B, RAM 102C, control arbitration means 102D, an ultrasonic double feed detection circuit 102E, and a coordinate input circuit 102F. The CPU 102A reads a program from the ROM 102B, and performs overall control of the sheet-like member conveyance device 101 using the RAM 102C as a work area. Further, the CPU 102A controls the ultrasonic double feed detection circuit 102E and the coordinate input circuit 102F via a control arbitration unit 102D described later.

  The ultrasonic double feed detection circuit 102E controls the ultrasonic transmission means 103 and the ultrasonic reception means 104 to detect double feed. The ultrasonic transmission means 103 is an ultrasonic transmitter and transmits ultrasonic waves to the sheet-like member in the conveyance path provided in the sheet-like member conveyance device 101. The ultrasonic wave receiving means 104 is an ultrasonic wave receiver composed of an ultrasonic sensor or the like, and receives an ultrasonic wave transmitted from the ultrasonic wave transmitter. The ultrasonic wave receiving unit 104 is installed so as to face the ultrasonic wave transmitting unit 103 across the conveyance path of the sheet-like member, and is transmitted by the ultrasonic wave transmitting unit 103 and transmitted through the sheet-like member that is a multifeed detection target. Receive sound waves.

  The ultrasonic transmission means 103 receives a 200 kHz pulse signal (hereinafter referred to as an ultrasonic transmission pulse) from the ultrasonic double feed detection circuit 102E, and transmits ultrasonic waves. The ultrasonic transmission pulse supplied to the ultrasonic transmission means 103 by the ultrasonic multifeed detection circuit 102E is, for example, a 200 kHz pulse signal for several cycles over a certain period of time. The ultrasonic wave transmitted by this is generally called a burst wave, and the burst wave is transmitted once every several ms.

  When a sheet-like member to be detected for double feed enters between the ultrasonic transmission means 103 and the ultrasonic reception means 104, the ultrasonic wave transmitted from the ultrasonic transmission means 103 reaches the ultrasonic reception means 104 by the sheet-like member. As a result, the amplitude of the ultrasonic wave reception signal output by the ultrasonic wave reception means 103 becomes weak. Therefore, in the present embodiment, the ultrasonic double feed detection circuit 102E (ultrasonic double feed detection means) has an ultrasonic reception signal amplification circuit 110 that amplifies the ultrasonic reception signal output from the ultrasonic reception means 104. Then, the ultrasonic reception signal is amplified to a signal amplitude that allows determination of double feed detection.

  The ultrasonic double feed detection circuit 102E includes an A-D converter 111, converts the ultrasonic reception signal (analog signal) amplified by the ultrasonic reception signal amplification circuit 110 into a digital signal, and sends it to the CPU 102A. Output. In the case where the CPU 102A has a built-in A / D converter, the ultrasonic reception signal (analog signal) amplified by the ultrasonic reception signal amplification circuit 110 is directly input to the CPU 102A. In any of the above configurations, the CPU 102A shares the double feed determination function of the ultrasonic double feed detection circuit 102E.

  The CPU 102A determines the double feed of the sheet-like member based on the output signal of the ultrasonic double feed detection circuit 102E.

  The coordinate input circuit 102 </ b> F (acquisition power detection means) detects an input operation caused by an operator's pressing via the operation unit 105. The operation unit 105 includes a resistive touch panel, and relates to coordinates corresponding to the position of the touch panel pressed by the operator based on an output voltage that is changed by an operation of the operator pressing the touch panel in a state where a voltage is applied. Read information (coordinate information).

  The touch panel of the operation unit 105 is applied with a voltage by the charging circuit 112 provided in the coordinate input circuit 102F, and outputs a coordinate signal corresponding to the coordinates of the part pressed by the operator to the coordinate input circuit 102F. The touch panel is not limited to the resistance film type in the present embodiment, and may be a capacitive type, an optical type, an ultrasonic type, or the like.

  The coordinate input circuit 102F includes an A-D converter 113, converts a coordinate signal (analog signal) output from the touch panel of the operation unit 105 into a digital signal, and outputs the digital signal to the CPU 102A. In the case where the CPU 102A is configured to incorporate an A-D converter, the coordinate signal is directly input to the CPU 102A.

  When the CPU 102A receives a coordinate detection interrupt for starting a coordinate detection operation that occurs approximately periodically using a timer or the like, the CPU 102A operates the operation unit 105 based on the coordinate signal output from the coordinate input circuit 102F. It is determined whether or not the touch panel is pressed. The CPU 102A acquires coordinate information corresponding to the position of the touch panel pressed by the operator.

  The control arbitration unit 102D performs the control timing and / or the coordinate input operation for performing the ultrasonic double feed detection operation so that the control timing for performing the ultrasonic double feed detection operation and the control timing for performing the coordinate input operation do not overlap. Arbitrate the control timing.

  FIG. 2 is a diagram for explaining a control mediation method executed by the control mediation means 102D in FIG. 1, (a) is a diagram for explaining a first control mediation method, and (b) is a diagram for explaining a second control mediation method. It is a figure explaining the control arbitration method of this.

  As shown in FIG. 2A, the control arbitration unit 102D performs an ultrasonic double feed detection operation caused by minute voltage fluctuations of the power supply and the ground, which is generated when the coordinate input circuit 102F applies a voltage to the operation unit 105. In order to avoid erroneous detection, the control timings 204 and 205 are adjusted so that the control timing 204 for performing the ultrasonic double feed detection operation and the control timing 205 for performing the coordinate detection operation do not overlap (first control arbitration method). . The control timing 204 of the ultrasonic double feed detection operation means that the ultrasonic double feed detection circuit 102E transmits an ultrasonic pulse to the ultrasonic transmission means 103, and then the ultrasonic reception means 104 receives the ultrasonic wave. A period from when the signal is amplified by the double feed detection circuit 102E, A / D converted, and the CPU 102A acquires the ultrasonic reception signal is shown. The coordinate detection operation control timing 205 indicates a period from when the coordinate input circuit 102F applies a voltage to the operation unit 105 until the coordinate information corresponding to the position of the touch panel pressed by the operator is acquired.

  The second control arbitration method shown in FIG. 2B is a coordinate detection operation for acquiring coordinate information of the position where the operator presses the touch panel, compared to the first control arbitration method shown in FIG. The frequency of doing is increasing. The frequency of performing the coordinate detection operation and the frequency of performing the ultrasonic double feed detection operation are not limited to the present embodiment, and may be arbitrarily set.

  When the coordinate detection operation is performed and the timing at which the operator detects that the touch panel is pressed is defined as a press detection point 201, the touch panel detects the press from the point when the coordinate detection operation one time before the coordinate detection operation is completed. It is thought that it was pressed during the period up to the point 201. In the present embodiment, this period is set as the double feed determination invalid period 202. The double feed determination invalid period 202 can be changed to an arbitrary period. The control arbitration unit 102D is configured to prevent erroneous detection of double feed caused by interference of a noise signal generated by static electricity or the like when pressed by an operator with an ultrasonic reception signal of the ultrasonic double feed detection circuit 102E. The determination result of the ultrasonic double feed detection operation performed during the double feed determination invalid period 202 that may have been pressed is invalidated (second control arbitration method). Further, even when the ultrasonic double feed detection operation is performed a plurality of times during the double feed determination invalid period 202 and it is determined that the multifeed is multiple times, all the multiple feed determinations are invalidated.

  The control arbitration unit 102D may stop the control of the coordinate input circuit 102F during the conveyance of the sheet-like member. As a result, no voltage is applied to the touch panel during conveyance of the sheet-like member, and the cause of generating a noise signal can be reduced. Further, since the sheet-like member transport device does not react even when the operator presses the touch panel, it is possible to reduce interference of electrostatic noise due to unnecessary operations.

  The control arbitration unit 102D may be a hardware circuit as shown in FIG. 1 or may be based on a program executed by the CPU 102A.

  FIG. 3 is a flowchart illustrating an example in which an arbitration control process that exclusively performs one of the ultrasonic double feed detection operation and the coordinate detection operation is realized based on a program. In order to simplify the description, a case in which the determination step of whether or not there is an ultrasonic double feed detection interrupt and the step of determining whether or not to detect a coordinate detection interrupt will be described as an example, but the timing at which both steps occur may be asynchronous.

  In FIG. 3, it is determined whether or not an ultrasonic double feed detection interrupt for starting an ultrasonic double feed detection operation that is generated substantially periodically using a timer or the like in the CPU 102A has occurred (step S301). If no ultrasonic double feed detection interrupt has occurred, it is determined whether or not a coordinate detection interrupt for starting a coordinate detection operation that occurs approximately periodically using a timer or the like in the CPU 102A has occurred. (Step S302). If a coordinate detection interrupt has not occurred, it is determined whether or not there has been a request for termination of control, such as a power switch being pressed (step S303). If there is a request for termination of control, this processing is terminated. If there is no control termination request, the process returns to step S301 to determine again whether or not there is an ultrasonic double feed detection interrupt.

  On the other hand, if an ultrasonic double feed detection interrupt for starting the ultrasonic double feed detection operation has occurred (YES in step S301), interrupts such as coordinate detection are prohibited (step S304), and an ultrasonic wave is transmitted. And reception is performed (step S305). Next, based on the transmission and reception results of the ultrasonic wave, it is determined whether or not the sheet-like member is double-feed (step S306). If it is double-feed, a double-feed detection flag is set (step S306a). In step S307, if it is not double feed, the double feed detection flag is reset (step S306b), and the flow advances to step S307. Next, an interrupt such as coordinate detection is permitted (step S307), and the process proceeds to step S302. While the processes of steps S304 to S307 are being executed, the coordinate detection interrupt is not valid. In the processing of steps S301 to S307, only the double feed detection flag is set / reset, and the double feed determination is not finalized.

  Note that the step S306 for determining the double feed and the step S306a / 306b for setting / resetting the double feed detection flag are not necessarily within the period from the step S304 for performing the interrupt prohibition process such as coordinate detection to the step S307 for performing the interrupt permission process. There is no need to execute it, and it is also possible to execute it in a normal routine other than the interrupt prohibition period.

  Next, when a coordinate detection interrupt for starting the coordinate detection operation has occurred (NO in step S302), interrupts such as ultrasonic double feed detection are prohibited (step S308), and the touch panel of the operation unit 105 is displayed. A voltage is applied (step S309). The interrupt prohibition process such as the ultrasonic double feed detection in step S308 prohibits the double feed determination process from being interrupted and executed at the same time, thereby generating a power supply and a ground that are generated by applying a voltage to the touch panel in step S309. This has the effect of avoiding erroneous detection of double feed caused by minute voltage fluctuations interfering with the ultrasonic signal of the ultrasonic double feed detection circuit 102E. Next, it is determined whether or not a touch panel pressing by the operator is detected (step S310). If no pressing is detected, the number T of times of pressing detection is set to 0 (step S310a), and ultrasonic double feed is performed. An interrupt such as detection is permitted (step S314), and the process proceeds to step S303. If a press is detected (YES in step S310), coordinate information corresponding to the position of the touch panel pressed by the operator is acquired (step S311), and ultrasonic waves due to electrostatic noise when the operator presses the touch panel are acquired. In order to avoid erroneous detection of the double feed detection circuit 102E, it is determined whether double feed has been detected immediately before, that is, whether or not the double feed detection flag Z is set to 1 (Z = 1?) ( Step S311a).

  If the double feed detection flag Z is not set to 1, the process proceeds to step S310a. If the double feed detection flag Z is set to 1, whether or not the touch panel is detected by the operator for the first time is determined. (T = 0?) Is determined (step S312). When the pressure detection is the first time (T = 0), the double feed detection flag Z is reset to 0 and the press detection count T is set to 1 in order to invalidate the double feed determination result obtained immediately before (T = 0). Step S313) and the process proceeds to Step S314. If the pressure detection is not the first time (T ≠ 0) (YES in step S312), for example, if the pressure detection is the second time, it is considered that the operator continued to press at least during the double feed determination invalid period 202. At this time, since the influence of electrostatic noise is reduced, the detection result of the ultrasonic double feed detection circuit 102E is not invalidated and the double feed determination is confirmed (step S312a). Next, interrupts such as ultrasonic double feed detection are permitted (step S314), and it is determined whether or not a control end request is made (step S303). If there is no control end request, the process returns to step S301 to control the control. If there is a request for termination, this processing is terminated.

  When an interrupt requesting the start of the coordinate detection operation occurs and the coordinate detection operation is started, in the period from step S308 for performing interrupt prohibition processing such as ultrasonic double feed detection to step SS314 for performing interrupt permission processing, Thus, it is conceivable that an interrupt requesting the start of the ultrasonic double feed detection operation occurs. However, since the ultrasonic double feed detection interrupt is prohibited, the ultrasonic double feed detection operation is not started. In such a case, the ultrasonic double feed detection operation may be started with a delay until the end of the coordinate detection operation. Further, the ultrasonic double feed detection operation may not be performed until there is an interrupt requesting the start of the next ultrasonic double feed detection operation. Further, as described above, since the interruption such as the coordinate detection is prohibited during the ultrasonic double feed detection operation, the coordinate detection operation is not started. By performing arbitration in this way, the first control arbitration method is executed in which the ultrasonic double feed detection operation and the coordinate detection operation are not performed at the same time, and the double feed determination result that may cause interference such as electrostatic noise. A second control arbitration method that eliminates the above is executed.

  In addition to the coordinate detection interrupt, noise components generated by switching of other circuits, control circuits of high voltage units used in copiers, etc., electromagnetic field generation circuits, etc. also have an adverse effect on the S / N ratio of ultrasonic reception signals. Therefore, it is also effective to apply this method so that other processing that generates noise components does not occur simultaneously with the double feed detection processing.

  According to the present embodiment, the control arbitration unit 102D performs the ultrasonic multifeed so as to avoid interference between the ultrasonic multifeed detection operation of the ultrasonic multifeed detection circuit 102E and the coordinate detection operation of the coordinate input circuit 102F. Since the detection operation and the coordinate detection operation are arbitrated, it is possible to prevent erroneous detection due to noise generated due to the coordinate detection operation, thereby improving the accuracy of double feed detection. Further, by providing the control arbitration means 102D, it is possible to reduce the cost by unifying the product substrate configuration and to realize the unification and simplification of the control circuit while avoiding the deterioration of the accuracy of the ultrasonic double feed detection circuit 102E. It becomes.

  FIG. 4 is a block diagram schematically showing the configuration of the sheet-like member transport device according to the second embodiment of the present invention.

  In FIG. 4, the sheet-shaped member conveyance device 401 includes a control unit 402, an ultrasonic transmission unit 403, an ultrasonic reception unit 404, and a sheet-shaped member detection unit 405.

  The control unit 402 includes a CPU 402A, ROM 402B, RAM 402C, control arbitration unit 402D, an ultrasonic double feed detection circuit 402E, and a sheet-like member detection circuit 402F. The CPU 402A reads the program from the ROM 402B, and controls the sheet-like member conveyance device 401 using the RAM 402C as a work area. Further, the CPU 402A controls the ultrasonic multifeed detection circuit 402E and the sheet-like member detection circuit 402F via the control mediation unit 402D.

  The ultrasonic double feed detection circuit 402E controls the ultrasonic transmission means 403 and the ultrasonic reception means 404 to perform double feed detection. The CPU 402A determines the double feed of the sheet-like member based on the output signal from the ultrasonic double feed detection circuit 402E amplified by the ultrasonic reception signal amplification circuit 410 and converted by the A / D converter 411. The CPU 402A shares the double feed determination function of the ultrasonic double feed detection circuit 402E, as in the first embodiment.

  The sheet-like member detection circuit 402F controls the sheet-like member detection unit 405. FIG. 5 is a diagram illustrating a configuration of the sheet-like member detection unit 405 in FIG. As shown in FIG. 5, the sheet-like member detection unit 405 includes a light emitting unit 1201 and a light receiving unit 1202, and the light receiving unit 1202 receives the light emitted by the light emitting unit 1201 and reflected by the sheet-like member. The presence or absence of a member is detected. The light emitting unit 1201 and the light receiving unit 1202 are arranged in the vicinity of any of the sheet feeding port, the conveyance path, and the sheet ejection port of the sheet-like member.

  The sheet-like member detection signal output from the sheet-like member detection circuit 402F is output to the CPU 402A. The presence or absence of the sheet-like member is determined by a comparator (not shown) provided in the sheet-like member detection circuit 402F, or an A / D converter (not shown) provided in the sheet-like member detection circuit 402F. A signal converted into a digital signal in accordance with the figure may be input to the CPU 402A and determined by the CPU 402A.

  When the CPU 402A receives a sheet-like member detection interrupt for starting a sheet-like member detection operation that occurs approximately periodically using a timer or the like, the CPU 402A performs a sheet operation based on a signal output from the sheet-like member detection circuit 402F. It is determined whether or not a member is detected.

  The control arbitration unit 402D controls the ultrasonic multifeed detection operation and / or the sheet-like member so that the control timing for performing the ultrasonic double-feed detection operation and the control timing for performing the sheet-like member detection operation do not overlap. Arbitrate the control timing to perform the detection operation.

  FIG. 6 is a diagram for explaining a control mediation method executed by the control mediation means 402D in FIG. 4, (a) is a diagram for explaining a third control mediation method, and (b) is a diagram for explaining the fourth control mediation method. It is a figure explaining the control arbitration method of this.

  In FIG. 6 (a), the control mediation means 402D includes a minute power supply and ground generated by the sheet-like member detection circuit 402F applying a voltage to the sheet-like member detection unit 405 to cause the light emitting means 1201 to emit light. In order to avoid erroneous detection of the ultrasonic double feed detection operation due to the voltage fluctuation, the control timing 504 so that the control timing 504 for performing the ultrasonic double feed detection operation and the control timing 505 for performing the sheet-like member detection operation do not overlap. 505 is arbitrated (third control arbitration method). The control timing 504 of the ultrasonic double feed detection operation is that the ultrasonic double feed detection circuit 402E transmits an ultrasonic pulse to the ultrasonic transmission means 403, and then the ultrasonic reception means 404 receives the ultrasonic wave. A period from when the signal is amplified by the double feed detection circuit 402E, A-D converted, and the CPU 402A acquires the ultrasonic wave reception signal intensity is shown. The control timing 505 of the sheet-like member detection operation is a period from when the sheet-like member detection circuit 402F applies a voltage to the sheet-like member detection unit 405 until the CPU 102A receives the sheet-like member detection information. Show.

  In the fourth control arbitration method shown in FIG. 6B, the sheet-like member detection unit 402F applies a voltage to the sheet-like member detection unit 405, compared to the third control arbitration method shown in FIG. The frequency of performing the sheet-like member detection operation is increasing. The frequency of performing the sheet-like member detection operation and the frequency of performing the ultrasonic double feed detection operation are not limited to the present embodiment, and may be arbitrarily set.

  If the sheet-like member detection operation is performed and the timing when the sheet-like member is detected is a sheet-like member detection point 501, the sheet-like member has completed the sheet-like member detection operation one time before the sheet-like member detection operation. It is considered that the leading end of the sheet-like member has passed the installation position of the sheet-like member detection unit 405 during the period from the point of time to the sheet-like member detection point 501. In the present embodiment, this period is set as a double feed determination invalid period 502. The control arbitration unit 402D is configured to prevent misdetection of double feed caused by electrostatic noise or the like due to conveyance of the sheet-like member interfering with the ultrasonic signal of the ultrasonic double feed detection circuit 402E. The determination result of the ultrasonic double feed detection operation performed during the double feed determination invalid period 502 that may have passed the installation position of the sheet-like member detection unit 405 is invalidated (fourth control arbitration method). Further, even when the ultrasonic double feed detection operation is performed a plurality of times during the double feed determination invalid period 202 and it is determined that the multifeed is multiple times, all the multiple feed determinations are invalidated.

  In addition, since static noise due to the conveyance of the sheet-like member frequently occurs mainly at the tip of the sheet-like member, the double feed determination invalid period 502 is performed once more than the sheet-like member detection operation including the sheet-like member detection point 501. The period from the time when the previous sheet-like member detection operation is completed to the period until the sheet-like member detection point 501 is included. However, the period is not limited to this, and may be affected by electrostatic noise or the like due to the conveyance of the sheet-like member. It is also possible to estimate the period with the characteristic from the sheet-like member detection point 501 as the double feed determination invalid period.

  Note that the control arbitration unit 402D may be a hardware circuit as shown in FIG. 4, or may be based on a program executed by the CPU 402A.

  FIG. 7 is a flowchart for explaining an example in which arbitration control processing for exclusively performing one of the ultrasonic double feed detection operation and the sheet-like member detection operation is realized based on a program. In order to simplify the description, a case where the determination step of whether or not there is an ultrasonic double feed detection interrupt and the step of determining whether or not a sheet-like member detection interrupt occurs sequentially will be described as an example, but the timings at which both steps occur may be asynchronous.

  In FIG. 7, it is determined whether or not an ultrasonic double feed detection interrupt for starting an ultrasonic double feed detection operation that occurs approximately periodically using a timer or the like in the CPU 402A has occurred (step S701). If the ultrasonic double feed detection interrupt has not occurred, is the sheet-like member detection interrupt for starting the sheet-like member detection operation generated approximately periodically using the timer in the CPU 402A or the like generated? It is determined whether or not (step S702). If no sheet-like member detection interrupt has occurred, it is determined whether a control end request has been made, such as a power switch being pressed (step S703). If there has been a control end request, this process ends. If there is no control end request, the process returns to step S701 to determine again whether or not there is an ultrasonic double feed detection interrupt.

  On the other hand, when an ultrasonic double feed detection interrupt for starting the ultrasonic double feed detection operation has occurred (YES in step S701), interrupts such as sheet-like member detection are prohibited (step S704), and the ultrasonic wave is detected. Is transmitted and received (step S705). Next, based on the transmission and reception results of the ultrasonic wave, it is determined whether or not the sheet-like member is double-feed (step S706). If it is double-feed, a double-feed detection flag is set (step S706a). In step S707, if it is not double feed, the double feed detection flag is reset (step S706b), and the flow advances to step S707. Next, interruption such as sheet-like member detection is permitted (step S707), and the process proceeds to step S702. While the processes in steps S704 to S707 are being performed, the sheet-like member detection interrupt is not valid. In the processing of steps S701 to S707, only the double feed detection flag is set / reset, and the determination of double feed is not finalized.

  Note that the step S706 for performing double feed determination and the step S706a / 706b for setting / resetting the double feed detection flag are not necessarily performed during the period from step S704 to perform interrupt prohibition processing such as sheet-like member detection to step S707. However, it is also possible to execute in a normal routine other than the interrupt prohibition period.

  Next, when a sheet-like member detection interrupt for starting the sheet-like member detection operation has occurred (NO in step S702), interruption such as ultrasonic double feed detection is prohibited (step S708), and the light emitting means 1201 is caused to emit light (step S709), and light is received by the light receiving means 1202 (step S710). The interrupt prohibition process such as ultrasonic double feed detection in step S708 is performed by prohibiting the double feed determination process from being interrupted and executed at the same time, thereby generating a power supply generated by applying voltage to the light emitting unit 1201 in step S709. This has the effect of avoiding erroneous detection of double feed caused by a minute voltage fluctuation of the ground interfering with the ultrasonic signal of the ultrasonic double feed detection circuit 402E. Next, it is determined whether or not a sheet-like member has been detected (step S711). If no sheet-like member has been detected, the sheet-like member detection count S is set to 0 (step S715), and ultrasonic double feed is performed. An interrupt such as detection is permitted (step S714), and the process proceeds to step S703. If a sheet-like member is detected (YES in step S711), in order to avoid erroneous detection of the ultrasonic double-feed detection circuit 402E due to electrostatic noise generated when the leading edge of the sheet-like member passes, the sheet-like member is overlapped immediately before. It is determined whether or not the feed has been detected, that is, whether or not the double feed detection flag Z is set to 1 (Z = 1?) (Step S711b).

  If the double feed detection flag Z is not set to 1, the process proceeds to step S715. If the double feed detection flag Z is set to 1, whether or not the sheet-like member is detected for the first time (S = 0?) Is determined (step S712). When the sheet-like member is detected for the first time (S = 0), the double-feed detection flag Z is reset to 0 in order to invalidate the double-feed determination result obtained immediately before, and the sheet-like member detection count S is set to 0. 1 is set (step S713), and the process proceeds to step S714. When the detection of the sheet-like member is not the first time (S ≠ 0) (NO in step S712), for example, when the detection of the sheet-like member is the second time (S = 1), the leading end of the sheet-like member passes. It is considered that a certain amount of time has passed. At this time, since the influence of electrostatic noise is reduced, the determination result of the ultrasonic double feed detection unit 402E is not invalidated and the double feed determination is confirmed (step S712a). Next, interrupts such as ultrasonic double feed detection are permitted (step S714), and it is determined whether or not a control end request is made (step S703). If there is no control end request, the process returns to step S701 to control the control. If there is a request for termination, this processing is terminated.

  When a sheet-like member detection interrupt is generated and a sheet-like member detection interrupt operation is started, as described above, during the period from step S708 for performing interrupt prohibition processing such as ultrasonic double feed detection to interrupt permission processing step S714. It is possible that an ultrasonic double feed detection interrupt request will occur. However, since the ultrasonic double feed detection interrupt is prohibited, the ultrasonic double feed detection operation is not started. In such a case, the ultrasonic double feed detection operation may be started with a delay until the end of the sheet-like member detection operation. Alternatively, the ultrasonic double feed detection operation may not be performed until there is an interrupt requesting the start of the next ultrasonic double feed detection operation. As described above, since the sheet-like member detection interrupt is prohibited during the ultrasonic double feed detection operation, the sheet-like member detection operation is not started. By performing arbitration in this way, the third control arbitration method is executed in which the ultrasonic multifeed detection operation and the sheet-like member detection operation are not performed at the same time, and multifeed determination with the possibility of interference such as electrostatic noise is performed. A fourth control arbitration method that eliminates the result is performed.

  According to the present embodiment, the control arbitration unit 402D avoids interference between the ultrasonic double feed detection operation of the ultrasonic double feed detection circuit 402E and the sheet-like member detection operation of the sheet-like member detection circuit 402F. Since the ultrasonic double feed detection operation and the sheet-like member detection operation are arbitrated, it is possible to prevent erroneous detection due to noise generated due to the sheet-like member detection operation, thereby improving the accuracy of double feed detection. Can do. Further, by providing the control arbitration unit 402D, it is possible to reduce the cost by unifying the product substrate configuration and to realize the unification and simplification of the control circuit while avoiding the deterioration of accuracy of the ultrasonic double feed detection circuit 402E. It becomes.

  FIG. 8 is a diagram illustrating a modification of the sheet-like member detection unit 405 of FIG.

  As shown in FIG. 8, the sheet-like member detection unit 800 includes a light emitting unit 1201 and a light receiving unit 1202, and a reflection member 1303 arranged with respect to the light emitting unit 1201 and the light receiving unit 1202 with a sheet-like member conveyance path interposed therebetween. Have The sheet-like member detection unit 800 causes the light emitting means 1301 to emit light, and the light receiving means 1302 receives the reflected light reflected by the reflecting member 1303 and the reflected light reflected by the sheet-like member, respectively, and reflects them. The presence or absence of a sheet-like member is detected based on the difference in the amount of light. For example, the light emitting unit 1301 and the light receiving unit 1302 are arranged in the vicinity of any of the sheet feeding port, the conveyance path, and the sheet discharging port of the sheet-like member. Thereby, the presence or absence of a sheet-like member can be accurately detected.

  FIG. 9 is a diagram showing another modification of the sheet-like member detection unit 405 of FIG.

  As shown in FIG. 9, the sheet-like member detection unit 900 is disposed with the light emitting means 1401 and the light receiving means 1402 sandwiching the sheet-like member conveyance path with respect to the light emitting means 1401 and the light receiving means 1402, and one end emits light. It has a substantially tubular light guide body 1403 arranged so as to face the means 1401 and to be opposed to the light receiving means 1402 at multiple ends. The sheet-like member detection unit 900 causes the light emitting means 1401 to emit light, and the light receiving means 1402 receives the light transmitted through the light guide 1403 and the reflected light reflected by the sheet-like member, respectively. The presence or absence of a sheet-like member is detected based on the difference. The light emitting unit 1401 and the light receiving unit 1402 are disposed, for example, in the vicinity of any of the sheet feeding port, the conveyance path, and the sheet discharging port of the sheet-like member. Thereby, the presence or absence of a sheet-like member can be accurately detected.

  FIG. 10 is a block diagram schematically showing the configuration of the sheet-like member transport device according to the third embodiment of the present invention.

  In FIG. 10, the sheet-like member conveyance device 701 includes a control unit 702, an ultrasonic transmission unit 703, and an ultrasonic reception unit 704. The control unit 702 is connected to a communication target device 705 disposed outside the sheet-like member conveyance device 701. Note that the communication target device 705 may be disposed inside the sheet-like member conveyance device 701.

  The control unit 702 includes a CPU 702A, a ROM 702B, a RAM 702C, a control arbitration unit 702D, an ultrasonic double feed detection circuit 702E, and a communication circuit 702F. The CPU 702A reads the program from the ROM 702B and performs overall control of the sheet-like member conveyance device 701 using the RAM 702C as a work area. Further, the CPU 702A controls the ultrasonic double feed detection circuit 702E and the communication circuit 702F via a control arbitration unit 702D described later.

  The ultrasonic double feed detection circuit 702E controls the ultrasonic transmission unit 703 and the ultrasonic reception unit 704 to perform double feed detection. The CPU 702A determines the double feed of the sheet-like member based on the output signal from the ultrasonic double feed detection circuit 702E amplified by the ultrasonic reception signal amplification circuit 710 and converted by the A / D converter 711. The CPU 702A shares the double feed determination function of the ultrasonic double feed detection circuit 702E, as in the first embodiment.

  The communication circuit 702F transmits and receives information determined by the ultrasonic double feed detection circuit 702E between the control unit 702 and the communication target device 705. The information to be transmitted / received is not limited to the information determined by the ultrasonic double feed detecting means 702E, and is, for example, coordinate information of an operation unit (not shown) or sheet-like member detection information of a sheet-like member detection unit. Also good. Alternatively, setting information for the communication target device 705 to control the control unit 702 may be used.

  The control arbitration unit 702D does not overlap the control timing for performing the ultrasonic double feed detection operation with the timing at which the communication unit 702F transmits the communication information to the communication target device 705 or the timing at which the communication information is received from the communication target device 705. To mediate. That is, the control arbitration unit 702D receives the ultrasonic wave by the ultrasonic wave reception unit 704 after the ultrasonic double feed detection circuit 702E transmits the ultrasonic pulse to the ultrasonic wave transmission unit 703, and the ultrasonic reception signal amplification circuit. Control is performed so that the communication circuit 702F does not transmit / receive communication information to / from the communication target device 705 during a period from when the signal is amplified and A / D converted to when the CPU 702A receives the signal.

  However, when the communication target device 705 transmits communication information at an arbitrary timing, a situation occurs that overlaps the control timing for performing the ultrasonic double feed detection operation. In this case, there is a possibility that noise from the signal reception circuit of the communication unit 702F interferes with the ultrasonic double feed detection circuit 702E due to reception of the communication signal. In order to avoid this, after the ultrasonic double feed detection means 702E transmits an ultrasonic pulse to the ultrasonic transmission means 703, the ultrasonic reception means 704 receives the ultrasonic wave, and the ultrasonic reception signal amplification circuit receives the signal. Until the CPU 702A receives the signal after amplification and AD conversion, the control arbitration unit 702D arbitrates the communication target device 705 to temporarily stop transmission of communication information. As a specific arbitration method, a method of controlling transmission / reception by connecting a signal line indicating communication information transmission permission / transmission stop to the communication target device 705 or communication information transmission permission / transmission stop is illustrated. A method of issuing a command is used.

  Alternatively, after the ultrasonic multifeed detection circuit 702E transmits an ultrasonic pulse to the ultrasonic transmission means 703, the ultrasonic reception means 704 receives the ultrasonic wave, and the ultrasonic reception signal in the ultrasonic multifeed detection circuit 702E. Until the CPU 702A receives the signal after the signal is amplified by the amplification circuit 710 and A / D converted, the control arbitration unit 702D receives the communication information from the communication target device 705. May be electrically disconnected.

  FIG. 11 is a diagram illustrating a control arbitration method executed by the control arbitration unit 702D of FIG.

  In FIG. 11, a timing at which the communication circuit 702 </ b> F detects reception of communication information from the communication target device 705 is defined as a communication information reception point 801. The control arbitration means 702D avoids erroneous detection of the ultrasonic multifeed detection means 702E due to a noise signal generated by switching of a signal reception circuit (not shown) provided in the communication circuit 702F, so that the predetermined time just before reception of communication information is avoided. The determination result of the ultrasonic double feed detection 802 included in the double feed detection invalid period 803 is invalidated.

  Note that the control arbitration unit 702D may be a hardware circuit as shown in FIG. 10, or may be based on a program executed by the CPU 702A.

  FIG. 12 is a flowchart illustrating an example in which the arbitration control process for performing the control arbitration operation is realized based on a program. In the processing of FIG. 12, the same steps as those of FIG. 7 are denoted by the same reference numerals, and redundant description is omitted, and only the portions different from the processing of FIG.

  In FIG. 12, it is determined whether or not an interrupt for starting the ultrasonic double feed detection operation has occurred (step S1201). If no ultrasonic multifeed detection interrupt has occurred, a communication transmission interrupt has occurred. It is determined whether or not (step S1202). If no communication transmission interrupt has occurred, it is further determined whether or not a communication reception interrupt has occurred (step S1203). If no communication reception interrupt has occurred, it is determined whether double feed has been detected immediately before, that is, whether the double feed detection flag z is set to 1 (z = 1?) (Step S1203a). If the double feed detection flag z is set to 1, the double feed determination is confirmed (step S1203b), and the process proceeds to step S1204. If the double feed detection flag z is not set to 1, the control ends. Is determined (step S1204). If there is no control end request, the process returns to step S1201. If there is a control end request, the process ends.

  On the other hand, if it is determined that a communication transmission interrupt has occurred (YES in step S1202), interrupts such as ultrasonic double feed detection are prohibited (step S1205), and information is transmitted to the communication target device 705 (step S1206). Then, interruption such as ultrasonic double feed detection is permitted (step S1207), and the process proceeds to step S1203. While the processes in steps S1205 to S1207 are being executed, the ultrasonic double feed detection interrupt, the communication reception interrupt, and the like are not valid.

  If it is determined that a communication reception interrupt has occurred (YES in step S1203), interrupts such as ultrasonic double feed detection are prohibited (step S1208), and information is received from the communication target device 705 (step S1209). In order to invalidate the double feed determination result, the double feed detection flag z determined to be double feed during the period when the information may be transmitted from the communication target device 705 is reset to 0 (step S1210). . This prevents erroneous determination of double feeding. Next, interruption such as ultrasonic double feed detection is permitted (step S1211), and the process proceeds to step S1204.

  According to the present embodiment, the control arbitration unit 702D performs the ultrasonic double feed detection operation so as to avoid interference between the ultrasonic double feed detection operation of the ultrasonic double feed detection circuit 702E and the transmission / reception operation of the communication circuit 702F. Since the transmission / reception operation is arbitrated, erroneous detection due to noise generated due to the transmission / reception operation can be prevented, thereby improving the accuracy of double feed detection. In addition, by providing the control arbitration means 702D, it is possible to reduce the cost by unifying the product substrate configuration, and to unify and simplify the control circuit while avoiding a decrease in accuracy of the ultrasonic double feed detection circuit 102E. It becomes.

  In each of the above embodiments, the ROM and RAM included in the control means are a non-volatile memory such as a hard disk device, a magneto-optical disk device, or a flash memory, or a recording medium such as a CD-ROM that can only be read. The recording medium may be a volatile memory, or a computer-readable / writable recording medium using a combination of these.

  The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” means a volatile memory (RAM) inside the CPU in the control means serving as a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. As described above, it is assumed that the program is held for a certain period of time.

  The program may be transmitted from a computer system storing the program in a memory or the like to a memory in the control means via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program indicates a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.

  The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the internal memory of CPU702A which is a signal analysis means, and what is called a difference file (difference program) may be sufficient.

  A program product such as a computer-readable recording medium in which the above program is recorded can also be applied as each embodiment of the present invention.

  As mentioned above, although each embodiment of this invention has been described in detail with reference to the drawings, the specific configuration is not limited to the above-described embodiment, and includes design and the like within the scope not departing from the gist of the present invention.

It is a block diagram which shows roughly the structure of the sheet-like member conveying apparatus which concerns on the 1st Embodiment of this invention. It is a figure explaining the control mediation method performed by the control mediation means in FIG. 1, (a) is a figure explaining the 1st control mediation method, (b) is the 2nd control mediation method. It is a figure explaining. It is a flowchart which shows the example which implement | achieved based on the program the arbitration control process which performs exclusively one of an ultrasonic double feed detection operation and a coordinate detection operation. It is a block diagram which shows roughly the structure of the sheet-like member conveying apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the structure of the sheet-like member detection part in FIG. It is a figure explaining the control mediation method performed by the control mediation means in FIG. 4, (a) is a figure explaining the 3rd control mediation method, (b) is the 4th control mediation method. It is a figure explaining. It is a flowchart explaining the example which implement | achieved based on the program the arbitration control process which performs exclusively one of an ultrasonic multifeed detection operation and a sheet-like member detection operation. It is a figure which shows the modification of the sheet-like member detection part of FIG. It is a figure which shows the other modification of the sheet-like member detection part of FIG. It is a block diagram which shows roughly the structure of the sheet-like member conveying apparatus which concerns on the 3rd Embodiment of this invention. It is a figure explaining the control mediation method performed by the control mediation means of FIG. It is a flowchart which shows the example which implement | achieved the mediation control process which performs said control mediation operation | movement based on a program. It is a block diagram which shows schematically the conventional sheet-like member conveying apparatus using an ultrasonic wave. It is a figure which shows the structure of the double feed detection means in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Sheet-like member conveying apparatus 102 Control means 103 Ultrasonic transmission means 104 Ultrasonic reception means 105 Operation part 102D Control arbitration means 102E Ultrasonic double feed detection circuit 102F Coordinate input circuit

Claims (8)

In the sheet-like member conveying device that conveys the sheet-like member,
The ultrasonic wave receiving means that has an ultrasonic wave transmitting means and an ultrasonic wave receiving means that are arranged across a conveyance path of the sheet-like member, and that receives the ultrasonic wave transmitted by the ultrasonic wave transmitting means and transmitted through the sheet-like member. Based on the ultrasonic reception signal output from the ultrasonic double feed detection means for detecting double feed of the sheet-like member;
Different from the ultrasonic double feed detection means, at least one of other detection means and communication means in the sheet-like member transport device,
The multi-feed detection operation and the other so as to avoid interference between the multi-feed detection operation of the ultrasonic multi-feed detection unit and at least one of the detection operation of the other detection unit and the transmission / reception operation of the communication unit. And a control mediation means for mediating at least one of the detection operation and the transmission / reception operation. The other detection means includes an instruction input unit that inputs an operator's instruction by pressing, and detects an input operation by the operator's press through the instruction input unit,
The control arbitration means controls to avoid interference of noise generated due to an operation of an operator pressing the surface of the instruction input unit with respect to the double feed detection operation by the ultrasonic double feed detection means. The sheet-like member conveying device according to claim 1, wherein The other detection means detects an input operation due to an operator's press based on a voltage applied to the instruction input unit,
The control arbitration unit performs control so as to avoid interference of noise generated due to voltage application to the instruction input unit with respect to the double feed detection operation of the ultrasonic double feed detection unit. Item 3. The sheet-like member conveying device according to Item 2. The other detection means is a sheet-like member detection means for detecting the presence or absence of a sheet-like member conveyed along the conveyance path,
The control arbitration means controls to avoid interference of noise generated due to voltage application to the sheet-like member detection means with respect to the double feed detection operation of the ultrasonic double feed detection means. The sheet-like member conveying device according to claim 1. The other detection means is a sheet-like member detection means for detecting the presence or absence of a sheet-like member conveyed along the conveyance path,
The control arbitration unit conveys the sheet-like member with respect to the double-feed detection operation of the ultrasonic double-feed detection unit based on a signal detected by the sheet-like member detection unit of the sheet-like member conveyed on the conveyance path. 2. The sheet-like member conveying apparatus according to claim 1, wherein the sheet-like member conveying device is controlled to avoid interference of electrostatic noise generated due to the noise. The communication means is a communication means for transmitting / receiving a signal to / from a communication device arranged at least one of the outside and the inside of the device,
The control arbitration unit avoids interference of noise generated due to at least one of a reception signal received by the communication unit and a transmission signal transmitted from the communication unit with respect to the control circuit of the ultrasonic double feed detection unit. The sheet-like member conveying device according to claim 1, wherein the sheet-like member conveying device is controlled. A sheet-like member conveying method applied to a sheet-like member conveying device having an ultrasonic wave transmitting means and an ultrasonic wave receiving means arranged across a sheet-like member conveying path,
Ultrasonic multi-feed detecting the multi-feed of the sheet-like member based on the ultrasonic reception signal output from the ultrasonic receiver that receives the ultrasonic wave transmitted by the ultrasonic transmitter and transmitted through the sheet-like member. A detection step;
Different from the ultrasonic double feed detection step, at least one of another detection step and a communication step in the sheet-like member transport device,
The multifeed detection operation and the other so as to avoid interference between the multifeed detection operation in the ultrasonic multifeed detection step and at least one of the detection operation in the other detection step and the transmission / reception operation in the communication step. And a control step of mediating at least one of the detection operation and the transmission / reception operation. 8. A method for causing a computer to execute a sheet-like member conveying method according to claim 7, which is applied to a sheet-like member conveying device having an ultrasonic wave transmitting means and an ultrasonic wave receiving means arranged with a sheet-like member conveying path interposed therebetween. A program,
Ultrasonic multi-feed detecting the multi-feed of the sheet-like member based on the ultrasonic reception signal output from the ultrasonic receiver that receives the ultrasonic wave transmitted by the ultrasonic transmitter and transmitted through the sheet-like member. A detection module;
Different from the ultrasonic double feed detection module, at least one of the other detection module and the communication module in the sheet-like member transport device,
The multifeed detection operation and the other so as to avoid interference between the multifeed detection operation in the ultrasonic multifeed detection module and at least one of the detection operation in the other detection module and the transmission / reception operation in the communication module. And a control module that mediates at least one of the detection operation and the transmission / reception operation.

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