WO2013084328A1

WO2013084328A1 - Multiplex communication system, transmission device, and receiving device

Info

Publication number: WO2013084328A1
Application number: PCT/JP2011/078369
Authority: WO
Inventors: 重元廣田; 伸夫長坂; 泰章今寺
Original assignee: 富士機械製造株式会社
Priority date: 2011-12-08
Filing date: 2011-12-08
Publication date: 2013-06-13
Also published as: JPWO2013084328A1; JP5909243B2

Abstract

Provided are: a multiplex communication system capable of simultaneously performing a quality check on a transmission line, and performing normal data processing for actual use, by multiplexing data for evaluating transmission quality with data for actual use; a transmission device; and a receiving device. A random bit sequence generated by a transmission-side random number generator on the transmission side is multiplexed with transmission data and transmitted. On the receiving side, the transmitted random bit sequence is compared to a comparative random bit sequence generated by a receiving-side random number generator. The comparative random bit sequence has the same bit sequence as the random bit sequence generated by the transmission-side random number generator; hence, a bit error rate tester is capable of detecting bit errors occurring in random bit sequences during transmission, and measuring the bit error rate.

Description

Multiplexed communication system, transmitter, and receiver

The present invention relates to a multiplexed communication system, a transmission device, and a reception device that evaluate the quality of a transmission line in parallel with data communication related to actual use.

Conventionally, techniques for evaluating communication quality have been disclosed. For example, for a network including a plurality of mobile stations and a plurality of base stations, a technique for specifying at least two different triggers for transmitting a measurement report from the mobile station to the network is disclosed. The trigger is preferably a threshold above or below a parameter of the radio signal, and sends a measurement report in response to detecting that the measured value exceeds its upper threshold or is lower than its lower threshold (Patent Document 1, etc.).

Further, in the optical transmission apparatus, a quality degradation alarm indicating degradation of transmission quality is issued based on the received data, the issued quality degradation alarms are collected, and the transmission path is determined based on the number of issued quality degradation alarms. A technique for controlling the issuance of a transmission path quality degradation alarm indicating that the quality of the network is degraded is disclosed (Patent Document 2, etc.).

Japanese translation of PCT publication No. 2002-504792 Japanese Patent No. 4780518

The background art exemplified in Patent Document 1 relates to a mobile communication network including a plurality of mobile stations and a plurality of base stations. In response to detection of a plurality of different trigger conditions, measurement at the mobile station is used as a measurement report timing for reporting to the base station. For example, when the measured value of the parameter of the radio signal exceeds the upper threshold and when the value falls below the lower threshold, the measurement report timing is set.

Further, the background art exemplified in Patent Document 2 determines the transmission quality of the optical transmission line and determines that the quality of the transmission line has deteriorated in response to an alarm that the quality has deteriorated in the determination at a plurality of locations. It is.

However, the background art exemplified in Patent Document 1 only describes that a measurement report is performed under each of a plurality of trigger conditions. There is no description regarding the difference in communication timing between the measurement report and the normal data communication, and it is not assumed that both are performed simultaneously. In addition, the background art exemplified in Patent Document 2 only describes that quality degradation of a transmission path is determined by a plurality of determinations. There is no description regarding the difference in communication timing between the measurement report and the normal data communication, and it is not assumed that both are performed simultaneously.

Any of the background arts exemplified in the above-mentioned patent documents multiplexes data for evaluating transmission quality in parallel with data for actual use, and checks the quality of the transmission path simultaneously with normal data processing for actual use. There is no disclosure or suggestion regarding what to do. There is no solution to the problem in parallel transmission of data whose transmission quality is evaluated by multiplexing the transmission of data related to actual use.

The present invention has been made in view of the above problems, and by multiplexing data for evaluating transmission quality with data for actual use, the transmission path quality check is performed simultaneously with normal data processing for actual use. It is an object of the present invention to provide a multiplexed communication system, a transmission device, and a reception device that can be performed.

The multiplex communication system according to claim 1 of the present application made in view of the above problems is a transmission-side random number generator in which activation / stop of generation of a random number bit string is instructed by a trigger signal input from the outside on the transmission side And a multiplexing unit that multiplexes the transmission data, the random number bit string, and the trigger signal. On the receiving side, a restoration unit that restores transmission data, a random number bit string, and a trigger signal from the multiplexed signal, and a start / stop command according to the trigger signal, and a comparison random number bit string having the same bit arrangement as the random number bit string A reception-side random number generator to be generated, and a bit error rate measuring device that is instructed to start and stop in response to a trigger signal and measure the bit error rate of the random number bit string with respect to the comparison random number bit string.

The multiplexed communication system according to claim 2 is the multiplexed communication system according to claim 1, wherein the multiplexed data sequence generated by the multiplexing unit is arranged on the transmission side to arrange the transmission data. The first data area is secured and the second data area is secured for arranging the random number bit string. Here, the second data area is an area in which a plurality of sets of random number bit strings obtained by replicating random number bit strings in a predetermined number are arranged. The bit error rate measuring instrument measures the bit error rate for each of a plurality of sets of random number bit strings.

The multiplexed communication system according to claim 3 is the multiplexed communication system according to claim 1 or 2, wherein the multiplexing unit multiplexes a plurality of sets of trigger signals obtained by duplicating the trigger signal. .

Further, the transmission device according to claim 4 is provided in the multiplexed communication system. A transmission-side random number generator instructed to start / stop generation of a random number bit string by an externally input trigger signal, and a multiplexing unit that multiplexes transmission data, a random number bit string, and a trigger signal are provided. On the receiving side, processing related to the transmission data is performed, and start / stop is commanded according to the trigger signal, and the bit error rate is measured for the random number bit string.

Further, the receiving device according to claim 5 is provided in a multiplexed communication system. A restoration unit that restores the transmitted data, a random number bit string, and a trigger signal that commands the start / stop of generation of the random number bit string, and a start / stop command according to the trigger signal. A receiving-side random number generator that generates a comparative random number bit string having the same bit arrangement as the bit string, and a bit error rate measuring unit that is instructed to start / stop in response to a trigger signal and measures the bit error rate of the random number bit string relative to the comparative random number bit string, It has.

In the multiplexed communication system according to claim 1, a random number bit string generated by a transmission-side random number generator on the transmission side is multiplexed with transmission data and a trigger signal and transmitted by a trigger signal input from the outside. On the receiving side, the comparison random number bit string generated by the receiving side random number generator is compared with the transmitted random number bit string in response to the trigger signal. Since the comparison random number bit string has the same bit arrangement as the random number bit string generated by the transmission side random number generator, the bit error rate measuring device detects the bit error that occurred in the random number bit string by being transmitted, and the bit error The rate can be measured.

Therefore, it is not necessary to provide a dedicated measuring device to measure the bit error rate due to data transmission. By providing a transmission-side random number generator in the transmission-side device and a reception-side random number generator and a bit error rate measuring device in the reception-side device, the bit error rate can be measured in an actual use state. In this case, since a random number bit string can be multiplexed and transmitted with normal transmission data, the bit error rate can be measured even during operation of the device by normal data transmission. The transmission quality during operation can be grasped, and the operation reliability of the system can be improved. Further, the bit error rate can be measured on the receiving side according to the transmitted trigger signal. The start / end of bit error rate measurement between transmission and reception can be controlled by an external command to the transmission side.

In the multiplexed communication system according to claim 2, the multiplexed data string includes a first data area reserved for arranging transmission data and a second data area reserved for arranging random number bit strings. Since the transmission data is configured to be included, transmission data for actual use and a random number bit string for measuring the bit error rate can be mixed and multiplexed.

The second data area includes an area where a plurality of sets of random number bit sequences can be arranged, and the bit error rate measuring device measures the bit error rate for each of the plurality of sets of random number bit sequences. Thus, if a plurality of sets are multiplexed by duplicating the random number bit string generated by the transmission-side random number generator, a plurality of sets of bit error rates can be measured with one multiplexed data string. The number of bit error rate measurements that can be performed by transmitting one multiplexed data string can be increased according to the number of sets of multiplexed random number bit strings. The measurement time per bit error rate can be shortened, and the total measurement accuracy of the bit error rate can be improved.

In the multiplex communication system according to claim 3, the trigger signal is duplicated at the time of transmission, and a plurality of sets are multiplexed. Thus, the trigger signal is recognized only when a plurality of duplicate trigger signals are prepared. For this reason, it is possible to prevent a signal different from the original trigger signal from being erroneously recognized as the trigger signal due to a bit error.

The transmission device according to claim 4 and the reception device according to claim 5 can constitute the multiplexed communication system described in the present application. Thus, it is not necessary to provide a dedicated measuring device for measuring the bit error rate due to data transmission. In addition, the bit error rate can be measured while the device is operating by normal data transmission. The transmission quality during operation can be grasped, and the operation reliability of the system can be improved.

1 is a perspective view showing an electronic component mounting apparatus configured by arranging two electronic component mounting machines to which an electronic component supply apparatus is attached, and is an apparatus to which the multiplexed communication system of the present invention can be applied. . It is a top view which shows a part of tape feeder of the electronic component supply apparatus shown in FIG. 1, and the tape-ized components sent out by the tape feeder. It is a perspective view which shows the electronic component supply apparatus shown in FIG. It is sectional drawing which shows the tape feeder shown in FIG. It is a block diagram which shows the control apparatus with which the electronic component mounting machine shown in FIG. 1 is provided. It is a block diagram which shows the apparatus with which a transmission side is equipped. It is a block diagram which shows the apparatus with which a receiving side is equipped. It is a circuit diagram which shows an example of a PRBS generator. It is the figure which showed the flow of data processing typically.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, as an example to which the multiplexed communication system of the present application can be applied, the configuration of an electronic component mounting apparatus will be described with reference to FIGS. 1 to 5.

FIG. 1 shows an electronic component mounting apparatus (hereinafter, may be abbreviated as “mounting apparatus”) 10. The figure is a perspective view in which a part of the exterior component of the mounting apparatus 10 has been removed. The mounting apparatus 10 includes one system base 12 and two electronic component mounting machines (hereinafter, may be abbreviated as “mounting machines”) 16 arranged side by side adjacent to each other on the system base 12. In other words, the electronic component is mounted on the circuit board. In the following description, the direction in which the mounting machines 16 are arranged is referred to as an X-axis direction, and a horizontal direction perpendicular to the direction is referred to as a Y-axis direction.

Each of the mounting machines 16 included in the mounting apparatus 10 mainly includes a mounting machine main body 24 configured to include a frame unit 20 and a beam unit 22 overlaid on the frame unit 20, and a circuit board in the X-axis direction. A transport device 26 that transports and fixes the set position at a set position, a mounting head 28 that mounts an electronic component on a circuit board fixed by the transport device 26, and an X-axis mounted head 28 disposed on the beam unit 22. A moving device 30 that moves in the direction and the Y-axis direction, and an electronic component supply device 32 that is disposed in front of the frame portion 20 and supplies electronic components to the mounting head 28 (hereinafter, may be abbreviated as “supply device”) It has.

The transport device 26 includes two

conveyor devices

40 and 42, and the two

conveyor devices

40 and 42 are parallel to each other and extend in the X-axis direction, so that the central portion in the Y-axis direction of the frame portion 20. It is arranged. Each of the two

conveyor devices

40 and 42 has a structure in which a circuit board supported by each

conveyor device

40 and 42 is conveyed in the X-axis direction by an electromagnetic motor 44 (see FIG. 5). Further, each of the

conveyor devices

40 and 42 has a substrate holding device 46 (see FIG. 5), and is configured to hold the circuit board in a fixed position.

The mounting head 28 is for mounting electronic components on the circuit board held by the transport device 26, and has a suction nozzle 50 for sucking the electronic components on the lower surface. The suction nozzle 50 communicates with negative pressure air and a positive pressure air passage via a positive / negative pressure supply device 52 (see FIG. 5), and sucks and holds the electronic component at a negative pressure, so that a slight positive pressure is supplied. In this way, the held electronic component is detached. Furthermore, the mounting head 28 includes a nozzle lifting device (see FIG. 5) 54 that lifts and lowers the suction nozzle 50 and a nozzle rotation device (see FIG. 5) 56 that rotates the suction nozzle 50 about its axis. It is possible to change the vertical position of the electronic component to be held and the holding posture of the electronic component. The suction nozzle 50 is attachable to and detachable from the mounting head 28, and can be changed according to the size and shape of the electronic component.

The moving device 30 moves the mounting head 28 to an arbitrary position on the frame unit 20, an X-axis direction slide mechanism (not shown) for moving the mounting head 28 in the X-axis direction, and the mounting head. And a Y-axis direction slide mechanism (not shown) for moving 28 in the Y-axis direction. The Y-axis direction slide mechanism has a Y-axis slider (not shown) provided in the beam portion 22 so as to be movable in the Y-axis direction, and an electromagnetic motor (see FIG. 5) 64 as a drive source. The Y-axis slider can be moved to an arbitrary position in the Y-axis direction by the electromagnetic motor 64. The X-axis direction slide mechanism has an X-axis slider 66 provided on the Y-axis slider so as to be movable in the X-axis direction, and an electromagnetic motor (see FIG. 5) 68 as a drive source. The motor 68 enables the X-axis slider 66 to move to an arbitrary position in the X-axis direction. The mounting head 28 is attached to the X-axis slider 66, so that the mounting head 28 can be moved to an arbitrary position on the frame unit 20 by the moving device 30. The mounting head 28 can be attached to and detached from the X-axis slider 66 with a single touch, and can be changed to a different type of work head, such as a dispenser head.

The supply device 32 is disposed at the front end of the frame portion 20 as a base, and is a feeder-type supply device. The supply device 32 accommodates a taped part 70 (see FIG. 2) in which electronic parts are taped and accommodated in a state in which the taped part 70 is wound around a reel 72, and is accommodated in each of the plurality of tape feeders 74. And a plurality of delivery devices (see FIG. 5) 75 for feeding out the taped component 70, and the electronic components are sequentially supplied from the taped component 70 to the supply position to the mounting head 28. .

As shown in FIG. 2, the taped component 70 includes a carrier tape 82 in which a large number of receiving recesses 78 and feed holes 80 are formed at an equal pitch, an electronic component 84 received in the receiving recess 78, and a carrier tape 82. The top cover tape 86 covers the housing recess 78 in which the electronic component 84 is housed. On the other hand, as shown in FIG. 3, the tape feeder 74 has a reel holding portion 88 for holding a reel 72 around which the taped component 70 is wound, and a taped component 70 drawn out from the reel 72 on the upper end surface. It is composed of a feeder main body 90 that is extended.

As shown in FIG. 4, a sprocket 92 that engages with a feed hole 80 formed in the carrier tape 82 of the taped component 70 is built in the feeder main body 90, and the sprocket 92 is rotated. The taped component 70 with the top cover tape 86 attached to the carrier tape 82 is sent out in the direction away from the reel 72 on the upper end surface of the feeder main body 90. Then, when the top cover tape 86 is peeled off from the carrier tape 82 by a peeling device (not shown), the accommodation recesses 78 in which the electronic components 84 are accommodated are sequentially released at the tip of the upper end surface of the feeder main body 90. The electronic component 84 is taken out by the suction nozzle 50 from the opened accommodation recess 78.

Also, the tape feeder 74 is detachable from a tape feeder mounting base (hereinafter sometimes abbreviated as “mounting base”) 100 fixedly provided at the front end of the frame portion 20. The mounting base 100 includes a slide portion 102 provided on the upper surface of the frame portion 20 and a standing surface portion 106 erected on an end portion of the slide portion 102 on the side close to the conveying device 26. A plurality of slide grooves 108 are formed in the slide portion 102 so as to extend in the Y-axis direction, and the lower edge portion of the feeder main body 90 of the tape feeder 74 is fitted into each of the plurality of slide grooves 108. It is possible to slide in the state. And the side wall surface by the side of the sending direction which is the sending direction of the taped component 70 of the feeder main body 90 is made to slide in the direction which approaches the standing surface part 106 in the state which fitted the lower edge part of the feeder main body 90. 110 is attached to the standing surface portion 106. As a result, the tape feeder 74 is mounted on the mounting table 100.

The standing surface portion 106 is provided with a plurality of connector connecting portions 112 corresponding to the plurality of slide grooves 108. On the other hand, the connector 114 is provided on the side wall surface 110 of the tape feeder 74 attached to the standing surface portion 106, and when the side wall surface 110 of the tape feeder 74 is attached to the standing surface portion 106, the connector 114 is connected to the connector 114. The connection unit 112 is connected. Further, a pair of upright pins 116 are provided on the side wall surface 110 of the tape feeder 74 so as to sandwich the connector 114 in the vertical direction, and the connector connection portion 112 of the upright surface portion 106 of the mounting base 100 is connected in the vertical direction. Are fitted into a pair of fitting holes 118 formed so as to be sandwiched between the two.

Further, as shown in FIG. 4, a cover 120 is provided on the top of the mounting base 100 so as to be opened and closed. The cover 120 is attached to the end portion on the front side of the beam portion 22 of the mounting machine 16 so as to be rotatable about an axis extending in the X-axis direction, and the closed position covering the mounting table 100 and the mounting table 100 are opened. It is possible to rotate between the open position. When the cover 120 is closed while the tape feeder 74 is mounted on the mounting base 100, the feeder main body 90 of the tape feeder 74 that is mounted is covered by the cover 120.

A display portion 124 provided with three display lamps 122 (only one is shown in the figure) is attached to the lower end portion of the cover 120, and the tape feeder 74 is attached to the attachment base 100. When the cover 120 is closed in this state, the display unit 124 is positioned above the feeder main body 90. A plurality of display units 124 are provided corresponding to the plurality of slide grooves 108, and the display lamps 122 of the plurality of display units 124 are turned on when the tape feeder 74 is mounted on the mounting base 100, It is used as a guide to which of the plurality of slide grooves 108 the tape feeder 74 should be attached.

The mounting machine 16 includes a mark camera (see FIG. 5) 130 and a parts camera (see FIGS. 1 and 5) 132. The mark camera 130 is fixed to the lower surface of the X-axis slider 66 so as to face downward, and is moved by the moving device 30 so that the surface of the circuit board can be imaged at an arbitrary position. Yes. On the other hand, the parts camera 132 is provided between the transport device 26 of the frame unit 20 and the supply device 32 in a state of facing upward, and images the electronic component sucked and held by the suction nozzle 50 of the mounting head 28. It is possible. The image data obtained by the mark camera 130 and the image data obtained by the parts camera 132 are processed by the image processing device 134 (see FIG. 5), and information on the circuit board, the holding position of the circuit board by the board holding device 46. An error, a holding position error of the electronic component by the suction nozzle 50, and the like are acquired.

Further, the mounting machine 16 includes a control device 140 as shown in FIG. The control device 140 includes a controller 142 mainly composed of a computer having a CPU, ROM, RAM, etc., the

electromagnetic motors

44, 64, 68, the substrate holding device 46, the positive / negative pressure supply device 52, the nozzle lifting / lowering device 54, the nozzle rotation. A plurality of drive circuits 144 corresponding to each of the device 56 and the delivery device 75 and a plurality of control circuits 146 corresponding to each of the plurality of display lamps 122 provided in the plurality of display units 124 are provided. The controller 142 is connected to a drive source such as a transfer device or a moving device via each drive circuit 144, and can control the operation of the transfer device, the moving device, or the like. The controller 142 is connected to a plurality of display lamps 122 via each control circuit 146, and each of the plurality of display lamps 122 can be lit up in a controllable manner. The plurality of display units 124 may be provided with various switches (not shown), and various control signals accompanying switch inputs are sent to the control circuits 146. Further, an image processing device 134 that processes image data obtained by the mark camera 130 and the part camera 132 is connected to the controller 142.

In the mounting machine 16, with the configuration described above, it is possible to perform an electronic component mounting operation with the mounting head 28 on the circuit board held by the transport device 26. More specifically, the circuit board is first transported to the mounting work position by the transport device 26, and the circuit board is fixedly held at that position. Next, the mounting device 28 is moved onto the circuit board by the moving device 30, and the circuit board is imaged by the mark camera 130. By the imaging, the type of the circuit board and the holding position error of the circuit board by the transfer device 26 are acquired. An electronic component corresponding to the acquired type of circuit board is supplied by the tape feeder 74 of the supply device 32, and the mounting head 28 is moved by the moving device 30 to the supply position of the electronic component. Thereby, the electronic component is sucked and held by the suction nozzle 50 of the mounting head 28.

Subsequently, the mounting head 28 holding the electronic component is moved onto the parts camera 132 by the moving device 30, and the electronic component held by the mounting head 28 is imaged by the parts camera 132. The holding position error of the electronic component is acquired by the imaging. The moving device 30 moves the mounting head 28 to the mounting position on the circuit board, and the mounting head 28 rotates the mounting nozzle 50 based on the holding position error between the circuit board and the electronic component. Installed.

The multiplexed communication system of the present application can be applied to an electronic component mounting apparatus, an electronic component mounting apparatus exemplified in the electronic component mounting apparatus 10 described above, or an automatic machine that operates in various other production lines. It is a possible system. As described above, in the electronic component mounting apparatus 10, various data are transmitted from the control device 140 to the various

electromagnetic motors

44, 64, 68 and other movable devices and the display lamp 122 to control these devices. Is done. The control device 140 receives various data (not shown) from the mark camera 130, the parts camera 132, various

electromagnetic motors

44, 64, 68, other movable devices, the display unit 124, and the like for control. Provide.

Specifically, operation command data is issued from each drive circuit 144 of the control device 140 to various

electromagnetic motors

44, 64, 68 and other movable devices, and drive control is performed. Further, lighting control data is emitted from the control circuit 146 of the control device 140 to the display lamp 122, and lighting control is performed. On the other hand, the control device 140 receives image data from the mark camera 130 and the parts camera 132, and receives device information data such as torque information and position information from various

electromagnetic motors

44, 64, 68 and other movable devices. Various input data are received from sensors (not shown) or the like (not shown) provided in each device.

In the following embodiment, in the electronic component mounting apparatus 10 in an operating state in which such various data communication is performed, a pseudo error that measures a bit error rate (hereinafter abbreviated as BER) of a transmission line at the time of data communication. Multiplex communication system suitable for application to data transmission in which a random code (hereinafter abbreviated as PRBS signal. PRBS is an abbreviation representing Pseudo-Random Binary Sequence) is transmitted together. The device and the receiving device will be described.

FIG. 6 is a block diagram showing an apparatus provided on the transmission side. In addition to the actual data D1, D2,..., Dn required in the electronic component mounting apparatus 10 in the operating state, a PRBS signal PRBS1 for BER measurement is generated and the actual data D1, D2,. It is a control part that performs the function of multiplexing and transmitting together with Dn.

Real data D1, D2,..., Dn are sent to a multiplexing unit B11, which will be described later, via an input buffer B1. Here, the actual data D1, D2,..., Dn are the following data. When the transmission side is the control device 140, for example, it is operation command data for driving and controlling the

electromagnetic motors

44, 64, 68 and other movable devices, and lighting control data for controlling the lighting of the display lamp 122. When the transmission side is not the control device 140, it is image data output from the mark camera 130 or the parts camera 132, and various device information data emitted from the

electromagnetic motors

44, 64, 68 and other movable devices, Various input data from sensors and switches (not shown) provided in each device.

The transmission side is further provided with a PRBS replication unit B3, a trigger replication unit B5, a PRBS generator B7, a storage unit B9, and a multiplexing unit B11 for BER measurement.

In response to the external trigger signal TR (X), the trigger duplication unit B5 activates the PRBS generator B7 and duplicates the external trigger signal TR (X) to generate two trigger signals Tr1 (X) and Tr2 (X). To do. Here, the trigger signal is generated at each timing of the start of BER measurement and the end of measurement. In the following description, regarding the trigger signal, X is expressed as “S” when indicating the start of BER measurement, and X is expressed as “E” when indicating the end of BER measurement. In addition, when any of them is not specified, the notation is “X”.

The PRBS generator B7 reads the initial value stored in the storage unit B9 in response to the external trigger signal TR (S) for starting the BER measurement, and starts generating the PRBS signal PRBS1. The generated PRBS signal PRBS1 is continued until an external trigger signal TR (E) instructing the end of generation is input. The generated PRBS signal PRBS1 is sent to the PRBS duplicator B3 and duplicated. FIG. 6 illustrates a case where the duplication is performed in triplicate. The generated triple PRBS signals PRBS1, PRBS2, and PRBS3 are sent to the multiplexing unit B11.

On the other hand, the trigger duplication unit B5 duplicates the external trigger TR (X) to generate the trigger signals Tr1 (X) and Tr2 (X). The generated trigger signals Tr1 (X) and Tr2 (X) are sent to the multiplexing unit B11.

The multiplexing unit B11 multiplexes the input real data D1, D2,..., Dn, PRBS signals PRBS1, PRBS2, PRBS3, and trigger signals Tr1 (X), Tr2 (X). The multiplexed multiplexed data string is transmitted by the communication transceiver B15 after the error correction code is added in the error correction coding unit B13.

FIG. 7 is a block diagram showing an apparatus provided on the receiving side. The multiplexed data sequence received by the communication transceiver B21 is subjected to error detection and correction by the error correction decoding unit B23.

The receiving side further includes a multiplexing restoration unit B25, a trigger detection unit B27, a PRBS generator B29, a storage unit B31, a BER measuring device B33, and a BER determination unit B35 for BER measurement.

The error-corrected multiplexed data sequence is restored by the multiplexing composite unit B25, and individual real data D1, D2,..., Dn, PRBS signals PRBS1, PRBS2, PRBS3, and trigger signals Tr1 (X), Tr2 Separated into (X). Of these, the actual data D1, D2,..., Dn are transferred as they are to various devices of the electronic component mounting apparatus 10 in the operating state. Thereby, the operating state is continued.

Trigger signals Tr1 (X) and Tr2 (X) are input to the trigger detection unit B27. The trigger detection unit B27 determines that the PRBS signals PRBS1, PRBS2, and PRBS3 for BER measurement have been received in response to the input of both duplicated trigger signals Tr1 (X) and Tr2 (X). can do. This prevents the data value from being inverted due to a bit error or the like that occurs during transmission, so that a signal that is not the original trigger signal is misrecognized as a trigger signal and BER measurement is not started or ended. can do.

The trigger signal Tr (X) generated according to the trigger signals Tr1 (X) and Tr2 (X) is input to the PRBS generator B29 and the BER measuring device B33. The PRBS generator B29 has the same configuration as the PRBS generator B7. The initial value stored in the storage unit B31 is the same as the initial value stored in the storage unit B9. Therefore, the same PRBS signal PRBS1 as the PRBS signal PRBS1 generated by the PRBS generator B7 is generated according to the trigger signal Tr (S). The generated PRBS signal PRBS1 is continued until a trigger signal Tr (E) instructing the end of generation is input.

The PRBS signal PRBS1 generated by the PRBS generator B29 is sent to the BER measuring device B33. In the BER measuring device B33, the PRBS signal PRBS1 generated by the PRBS generator B29 is compared with each of the received PRBS signals PRBS1, PRBS2, and PRBS3, and BER measurement is performed. The BER is measured by measuring the number of bits different from the PRBS signal PRBS1 generated by the PRBS generator B29 in the bit string of the received PRBS signals PRBS1, PRBS2, and PRBS3.

The measured value of BER measured by the BER measuring device B33 is compared with a prescribed value stored in the storage unit B31 in the BER determination unit B35. Thereby, it is determined whether or not the transmission quality is acceptable, and a determination result is output. The determination result output from the BER determination unit B35 is displayed by a display device such as a display lamp, a display board, or a display monitor.

FIG. 8 is a circuit diagram showing an example of PRBS generators B7 and B29. The PRBS signal is a bit string defined by the ITU-T standard, and several standards are established depending on the length of the bit string. The circuit diagram shown in FIG. 8 is a generator that generates a (2 ⁹ -1) type bit string. Nine D-type latches 1DL to 9DL are connected in series to form a shift register, and the fifth-stage D-type latch 5DL and the ninth-stage D-type latch 9DL are input to the exclusive OR gate XOR. The output signal of the exclusive OR gate XOR is fed back to the first-stage D-type latch 1DL. At start-up, after initial values are set in the remarkable D-type latches 1DL to 9DL, the shift operation is continued in accordance with the clock signal CLK. The output signal OUT of the 9th stage D-type latch 9DL updated every cycle is output as a PRBS signal. The PRBS signal output at this time is a bit string defined as the (2 ⁹ -1) type.

FIG. 9 is a diagram schematically showing the flow of data processing in the present embodiment. In the present embodiment, on the assumption that the electronic component mounting apparatus 10 is in the operating state, the BER measurement of the transmission path is performed in the operating state. Therefore, actual data D1, D2, which are various data (device data) transmitted in the operating state of the electronic component mounting apparatus 10 such as operation command data, lighting control data, image data, device information data, and input data. In addition to Dn, trigger signals Tr1 (X) and Tr2 (X) generated based on PRBS signal PRBS1 for BER measurement and external trigger signal TR (X) indicating measurement start / end are multiplexed. To be sent.

During transmission, the PRBS signal PRBS1 and the external trigger signal TR (X) are duplicated. In the present embodiment, the PRBS signal PRBS1 is duplicated to generate PRBS signals PRBS1, PRBS2, and PRBS3. The external trigger signal TR (X) is duplicated to generate trigger signals Tr1 (X) and Tr2 (X).

The real data D1, D2,..., Dn, the triple replicated PRBS signals PRBS1, PRBS2, PRBS3, and the double replicated trigger signals Tr1 (X), Tr2 (X) are multiplexed. It communicates by propagating through the transmission line. The PRBS signals being transmitted are the triple replicated PRBS signals PRBS1, PRBS2, and PRBS3. For this reason, BER measurement can be performed in triplicate, and BER measurement with higher accuracy can be performed. Further, triple BER measurement can be embedded in one unit of the multiplexed data string, and the BER measurement time can be shortened. The trigger signals being transmitted are trigger signals Tr1 (X) and Tr2 (X) duplicated. Since the trigger signal is duplicated, the possibility that a signal that is not the original trigger signal is erroneously recognized as a trigger signal due to a bit error during transmission or the like is reduced, and the trigger timing can be reliably transmitted.

On the receiving side, the multiplexed data string is combined and separated into individual data. The actual data D1, D2,..., Dn are transferred to each device, and the operation and control in the normal operation state are continued. Is called. On the other hand, independently of the operation and control of the electronic component mounting apparatus 10 in the normal operating state, in triplicate according to the measurement start / end timing determined by the trigger signals Tr1 (X) and Tr2 (X). BER measurement is performed on each of the replicated PRBS signals PRBS1, PRBS2, and PRBS3.

As described in detail above, according to the present embodiment, the PRBS signal PRBS1 generated by the PRBS generator B7 on the transmission side is multiplexed with the actual data D1, D2,. On the receiving side, the BER measuring instrument B33 can measure the BER without affecting the normal operating state of the device associated with the actual data D1, D2,..., Dn. In this case, the PRBS generator B7 on the transmission side and the PRBS generator B29 on the reception side have the same configuration, and the initial values stored in the storage units B7 and B31 are also the same. The PRBS signal PRBS1 is the same bit string. Thereby, in the BER measuring device B33, the bit error which occurred in the middle of transmission can be confirmed, and BER can be measured.

It is possible to measure a bit error in a transmission line in data transmission in the normal operating state of the electronic component mounting apparatus 10 without providing a dedicated measuring apparatus. The BER can be measured in the actual operation state, and the transmission quality of the transmission line in the actual operation state can be accurately grasped. In addition, the transmission quality during operation can be grasped, and the operational reliability of the system can be improved.

Further, since the PRBS signal PRBS1 can be duplicated and transmitted, only one PRBS signal PRBS1 can be generated by the PRBS generator B7, and BER measurement can be performed in a multiplexed manner. It is possible to increase the number of BER measurements that can be performed by transmitting. The measurement time per BER measurement can be shortened and the total measurement accuracy can be improved.

In addition, since the external trigger signal TR (X) is duplicated and transmitted, it is possible to prevent a signal that is not the original trigger signal from being erroneously recognized as the trigger signal due to a bit error during transmission.

Here, the actual data D1, D2,..., Dn are examples of transmission data, and the PRBS3 signal PRBS1 is an example of a random number bit string and a comparison random number bit string. The PRBS generator B7 is an example of a transmission side random number generator, and the PRBS generator B29 is an example of a reception side random number generator. The multiplexing unit B11 is an example of a multiplexing unit, and the multiplexing restoration unit B25 is an example of a restoration unit. The BER measuring device B33 is an example of a bit error rate measuring device. In addition, the region where the actual data D1, D2,..., Dn are arranged in the multiplexed data sequence is an example of the first data region of the multiplexed data sequence, and the PRBS signals PRBS1, PRBS2, PRBS3 in the multiplexed data sequence. Is an example of the second data area of the multiplexed data string.

Needless to say, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made without departing from the spirit of the present invention.
For example, in the present embodiment, the number of replicas of the PRBS signal PRBS1 is tripled and the number of replicas of the external trigger signal TR (X) is doubled. However, the present application is not limited to this. Needless to say, multiple copies can be made.
Further, the replicated PRBS signal and trigger signal do not have to be the same data. You may comprise so that the bit value of at least one part of data may be changed with replication. In this case, if a change rule is defined in advance on the receiving side, BER measurement can be performed on the receiving side without any problem.
In addition, the transmission of the PRBS signal PRBS1 has been described as being multiplexed with the transmission of the actual data D1, D2,..., Dn, but the present application is not limited to this. It is also possible to set so that a PRBS signal is transmitted in a state where no actual data is transmitted.

10: Electronic

component mounting device

44, 64, 68: Electromagnetic motor 122: Display lamp 124: Display unit 130: Mark camera 132: Parts camera 140: Control device B1: Input buffer B3: PRBS replication unit B5: Trigger replication unit B7: PRBS generator B9, B31: storage unit B11: multiplexing unit B13: error correction coding unit B15, B21: communication transceiver B23: error correction decoding unit B25: multiplexing restoration unit B27: trigger detection unit B29: PRBS generator B33: BER measuring device B35: BER determination unit D1, D2,..., Dn: actual data PRBS1, PRBS2, PRBS3: PRBS signal TR (X): external trigger signal Tr1 (X), Tr2 (X), Tr (X) : Trigger signal

Claims

A multiplexed communication system,
On the sending side,
A random number generator on the transmission side, which is instructed to start / stop generation of a random number bit string by an externally input trigger signal;
A multiplexing unit for multiplexing transmission data, the random number bit string, and the trigger signal;
On the receiving side,
A restoration unit that restores the transmission data, the random number bit string, and the trigger signal from the multiplexed signal;
Initiating / stopping is commanded according to the trigger signal, and a receiving random number generator that generates a comparative random number bit string having the same bit arrangement as the random number bit string,
A multiplexed communication system comprising: a bit error rate measuring device that is instructed to start and stop in response to the trigger signal and measures a bit error rate of the random number bit string with respect to the comparison random number bit string.
On the sending side,
The multiplexed data sequence generated by the multiplexing unit includes a first data area reserved for arranging the transmission data and a second data area reserved for arranging the random number bit string,
The second data area is an area where a plurality of sets of random number bit strings obtained by replicating the random number bit string in a predetermined number are arranged,
2. The multiplexed communication system according to claim 1, wherein, on the receiving side, the bit error rate measuring unit measures a bit error rate for each of a plurality of sets of the random number bit strings.
The multiplexed communication system according to claim 1, wherein the multiplexing unit multiplexes a plurality of sets of the trigger signals obtained by duplicating the trigger signal.
A transmission device provided in a multiplexed communication system,
A random number generator on the transmission side, which is instructed to start / stop generation of a random number bit string by an externally input trigger signal;
A multiplexing unit for multiplexing transmission data, the random number bit string, and the trigger signal;
A transmission apparatus characterized in that, on the receiving side, processing related to the transmission data is performed, activation and stop are instructed in accordance with the trigger signal, and a bit error rate is measured for the random number bit string.
A receiving device provided in a multiplexed communication system,
A restoring unit for restoring the multiplexed data string transmitted including the transmission data, the random number bit string, and a trigger signal for instructing the start / stop of generation of the random number bit string;
Initiating / stopping is commanded according to the trigger signal, and a receiving random number generator that generates a comparative random number bit string having the same bit arrangement as the random number bit string,
A receiving apparatus comprising: a bit error rate measuring device which is instructed to start and stop in response to the trigger signal and measures a bit error rate of the random number bit string with respect to the comparison random number bit string.