WO2013084330A1

WO2013084330A1 - Optical wireless system, imaging device, and control device

Info

Publication number: WO2013084330A1
Application number: PCT/JP2011/078371
Authority: WO
Inventors: 伸夫長坂; 重元廣田; 神藤　高広; 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

Abstract

Provided are an optical wireless system that transmits image data and control commands between an imaging device and a control device using optical wireless communication, an imaging device, and a control device that comprise: a first optical module that uses invisible light to transmit image data from the imaging device to the control device; and a second optical module that uses visible light having a lower data transfer rate than the invisible light to transmit control commands from the control device to the imaging device. During optical wireless operation, the optical axis of the invisible light and the optical axis of the visible light are aligned. Image data comprising large amounts of data is transmitted using invisible light, which is capable of achieving a high-speed data transfer rate. Control commands comprising small amounts of data are transmitted using visible light, which is capable of achieving a data transfer rate lower than that of the invisible light. In addition, it is possible to carry out optical axis alignment for the optical wireless system using visible light.

Description

Optical wireless system, imaging device, and control device

The present invention relates to an optical wireless system that performs wireless transmission using light, and an imaging device and a control device that perform data transmission using the optical wireless system.

Conventionally, techniques related to signal transmission between a television camera and a video device have been disclosed. For example, regarding signal transmission between a television camera used in the field of FA (Factory Automation) and a video apparatus that processes the captured video signal, the number of signal lines is reduced and the cable diameter is reduced to be flexible. A signal transmission method that can use a cable and a device that provides a device using the method are disclosed (Patent Documents 1 and 2, etc.).

JP2011-41310A JP 2007-116734 A

However, all of the background techniques exemplified in the above-mentioned patent documents are based on the assumption that the television camera and the video apparatus are connected by a wired cable. Although the number of cables is reduced and the cable diameter is reduced, data transmission between the television camera and the video apparatus still uses a wired cable. Depending on the installation environment, it may be preferable to connect the television camera and the video apparatus by a wireless communication method such as optical wireless. However, the above background art discloses nothing about the connection by optical wireless communication.・ There is no suggestion. It does not provide any solution for the problem in reliably performing data transmission in optical wireless communication.

The present invention has been made in view of the above-described problems, and an optical wireless system, an imaging device, and a control device that perform transmission of image data and a control command by optical wireless communication between the imaging device and the control device. The purpose is to provide.

The optical wireless system according to claim 1 of the present application made in view of the above problems is an optical wireless system in which an imaging device and a control device are digitally interfaced by optical wireless. The first optical module for transmitting image data with invisible light from the imaging device to the control device, and the control command from the control device to the imaging device has a data transfer rate higher than the data transfer rate with invisible light. A second optical module for transmitting with low visible light. At the time of optical wireless, the optical axis of invisible light is matched with the optical axis of visible light.

An optical wireless system according to a second aspect is the optical wireless system according to the first aspect, wherein the imaging device includes a first light emitting module that emits invisible light and a second optical module among the first optical modules. The second light receiving module that receives visible light and the invisible light emitted from the first light emitting module are guided in the direction of the first predetermined axis, and the visible light that enters along the first predetermined axis is And a first optical inductor that branches into two light receiving modules. The control device also includes a second light emitting module that emits visible light among the second optical modules, a first light receiving module that receives invisible light among the first optical modules, and a visible light emitted from the second light emitting module. A second light guide for guiding light in the direction of the second predetermined axis and branching invisible light entering along the second predetermined axis to the first light receiving module; The optical axis alignment at the time of optical wireless is performed by aligning the first predetermined axis and the second predetermined axis so that visible light emitted from the second light emitting module is received by the second light receiving module. Is done.

Further, the imaging device according to claim 3 receives a control command from the control device and transmits image data to the control device through a digital interface using optical radio. A light emitting module that emits invisible light that transmits image data, a light receiving module that receives visible light whose data transfer rate is lower than that of invisible light that transmits a control command, and an invisible light emitted from the light emitting module Is provided in the direction of a predetermined axis, and visible light that enters along the predetermined axis is branched to the light receiving module.

The control device according to claim 4 receives image data from the imaging device and transmits a control command to the imaging device through a digital interface using optical wireless. A light emitting module that emits visible light that transmits a control command, a light receiving module that receives invisible light having a higher data transfer rate than the visible light that transmits a control command, and a predetermined amount of visible light emitted from the light emitting module. A light guide for guiding invisible light that is guided in the direction of the axis and enters along the predetermined axis to the light receiving module.

In the optical wireless system according to claim 1, invisible light emitted from the first optical module is used for image data transmitted from the imaging device to the control device, and the image data is transmitted from the control device to the imaging device. Visible light emitted from the second optical module is used as the control command.

As a result, image data with a large amount of data can be transmitted by non-visible light capable of transmitting at a high data transfer rate, and a control command with a small amount of data can be transmitted at a data transfer rate lower than that of non-visible light. Visible light can be used. Further, the optical axis of the optical wireless system can be aligned using visible light used for a control command with a low data transfer rate. While properly using the first and second optical modules according to the amount of data, optical axis alignment in optical wireless communication can be performed by the second optical module that emits visible light. A system can be efficiently constructed by using the second optical module for multiple functions.

In the optical wireless system according to claim 2, in the optical wireless alignment, visible light emitted from the second light emitting module provided in the control device is received by the second light receiving module provided in the imaging device. As described above, it can be performed by aligning the first predetermined axis that is the optical axis of the imaging device and the second predetermined axis that is the optical axis of the control device. In this case, since the light source is visible light emitted from the second light emitting module, the optical axes can be aligned while visually confirming.

Further, with the imaging device according to claim 3 and the control device according to claim 4, the optical wireless system described in the present application can be configured. The optical axis of optical wireless communication can be adjusted by visible light while using invisible light and visible light properly according to the amount of data.

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 figure which shows typically the structure in the case of applying an optical wireless system to the electronic component mounting apparatus of FIG. It is a block diagram which shows the structure of the optical wireless apparatus with which an optical wireless system is equipped.

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 optical wireless system of the present application can be applied to an electronic component mounting apparatus exemplified in the electronic component mounting apparatus 10 described above, an electronic component mounting apparatus, or an automatic machine that operates in various other production lines. System. As described above, in the electronic component mounting apparatus 10, image data from the mark camera (see FIG. 5) 130 and the parts camera (see FIGS. 1 and 5) 132 is transmitted to the control device 140. The control device 140 sends drive control data to the various

electromagnetic motors

44, 64, 68 (see FIG. 5) and other movable devices by the drive circuit 144 to perform drive control. Further, lighting control data is sent by the control circuit 146 and lighting control of the display lamp 122 is performed.

Although not shown, data transmission is generally performed in a direction opposite to the above data transmission direction. Various camera control signals are sent from the control device 140 to the mark camera 130 and the parts camera 132. In addition, servo control data necessary for servo control such as torque information and position information of the servo motor and the like is fed back to the control device 140 from the

electromagnetic motors

44, 64, 68 and other movable devices. Based on these pieces of information, the drive circuit 144 controls the

electromagnetic motors

44, 64, 68 and other movable devices. The

electromagnetic motors

44, 64, 68, other movable devices, the display unit 124, and the like are provided with various sensors and switches as necessary, according to the operation status of the various devices or artificially. A sensor switch signal is transmitted to the control device 140 when the switch is pressed.

In the electronic component mounting apparatus 10, data and signals are transmitted and received bidirectionally between the control device 140 and peripheral devices. Each of these data and signals has a unique data transfer rate, and the data transfer rate may vary greatly depending on the transmission direction. For example, between the mark camera 130 or the parts camera 132 and the control device 140, image data having a high data transfer rate is transmitted from the former to the latter, and a low data transfer rate is transmitted from the latter to the former. A camera control signal is transmitted. Further, between the

electromagnetic motors

44, 64, 68 and other movable devices and the control device 140, a sensor switch signal having a low data transfer rate is transmitted from the former to the latter, and from the latter to the former. Servo control data at a high data transfer rate is transmitted.

In addition, drive control data and servo control data transmitted bidirectionally between the

electromagnetic motors

44, 64, 68 and other movable devices and the control device 140 are not limited to image data, but are limited by control. Rapid processing may be required. Also, depending on the type of data, the data transfer rates may differ from each other. In addition, it is also possible that data is transmitted bidirectionally between the display unit 124 and the control device 140, and the data transfer rate of each data or signal is different.

In recent years, in the FA field related to electronic component mounting devices such as the electronic component mounting device 10, electronic component mounting devices, and automatic machines operating in various other production lines, wires for transmitting data to movable parts are used. Troubles such as disconnection may occur due to the load on the wire harness when the harness moves. In order to avoid this trouble, data transmission is performed by connecting devices by wireless communication. In this case, in the FA field, in view of the electromagnetic environment in the manufacturing process, the amount of data to be transmitted, and the high speed of the data transfer rate, communication using optical wireless instead of radio waves is being performed.

In the following embodiment, the electronic component mounting apparatus 10 is a case where data and signals are transmitted bidirectionally, and has a high data transfer rate in one transmission direction and low-speed data transfer in the other transmission direction. As an example of performing data transmission having a rate, an optical wireless system, an imaging device, and a control device that perform optical data transmission between the mark camera 130 or the parts camera 132 and the control device 140 will be described.

FIG. 6 is a diagram schematically showing a configuration when an optical wireless system is applied between the control device 140 and the camera 13X such as the mark camera 130 or the parts camera 132 in the electronic component mounting apparatus 10.

The control device 140 is controlled by a controller 142 configured by a computer system such as a PC. The controller 142 is interfaced via the image board 140A. The image board 140A is a board that interfaces with the camera 13X that receives image data and transmits a camera control signal.

The image board 140A receives an optical wireless signal 7A for image data and transmits an optical wireless signal 7B for a camera control signal via the optical wireless device 3. The other end is provided with the optical wireless device 1 that transmits the optical wireless signal 7A and receives the optical wireless signal 7B. The optical wireless device 1 is connected to the camera 13X.

The optical wireless signal 7A is a signal for transmitting image data captured by the camera 13X. Due to recent technological advances, camera digital interfaces are becoming faster year by year, and products having high-speed communication standards from 3 GBPS to over 21 GBP as data transfer rates have been proposed. Further, a forward error correction code such as a Reed-Solomon code is generally added as a means for detecting and correcting a data error associated with wireless transmission. These codes are added in addition to the actual image data. For this reason, in order to maintain the data transfer rate after adding such a code, further high-speed data transfer is required. Although the coding rate varies depending on the type of forward error correction code and the number of bits that can be corrected, depending on the case, a transfer rate of 1.5 to several times the actual image data may be required.

Therefore, as the light source such as a semiconductor laser used for the optical wireless signal 7A, it is preferable to use an invisible light source having a wavelength of 850 nm, 1300 nm, 1500 nm, or the like. This is because by using these wavelengths, transmission in a band of 10 GBPS to 40 GBPS is possible, and it can be used as the optical wireless signal 7A.

On the other hand, high speed is not required for the camera control signal. The camera control signal is data for performing various settings and adjustments necessary for imaging with the camera 13X, such as adjustment of the position and angle of the shooting direction of the camera, area setting such as zoom, and gain setting such as exposure. This is because high speed is not required.

Therefore, it is preferable to use, for example, a visible light source having a wavelength of 650 nm or its vicinity as a light source such as a semiconductor laser used for the optical wireless signal 7B. This is because by using these wavelengths, transmission in a band up to 3 GBPS is possible, and it can be used as the optical wireless signal 7B.

FIG. 7 shows the configuration of the

optical wireless devices

1 and 3. The optical wireless device 1 includes an optical lens 11, a light guide 13, a non-visible light emitting module 15, a visible light receiving module 17, and a control unit 19. The control unit 19 is an interface with the camera 13X, receives image data transferred from the camera 13X, sends the image data to the non-visible light emitting module 15, and responds to the camera control signal transferred from the visible light receiving module 17. 13X is controlled. The image data transferred from the control unit 19 is converted into an optical signal generated by the blinking of the invisible light source by the invisible light emitting module 15 and transferred to the light guide 13. The light guide 13 sends out the invisible light signal transferred from the invisible light emitting module 15 along the optical axis 7 for optical radio via the lens 11. Further, the visible light signal that has propagated from the control device 140 side along the optical axis 7 for optical radio is incident through the lens 11 and guided to the visible light receiving module 17 by the light guide 13.

Similarly, the optical wireless device 3 includes an optical lens 31, a light guide 33, a visible light emitting module 35, a non-visible light receiving module 37, and a control unit 39. The control unit 39 is an interface with the control device 140, receives a camera control signal transferred from the control device 140, sends it to the visible light emitting module 35, and controls image data transferred from the invisible light receiving module 37. Transfer to device 140. The camera control signal transferred from the control unit 39 is converted by the visible light emitting module 35 into an optical signal resulting from the blinking of the visible light source, and transferred to the light guide 33. The light guide 33 sends the visible light signal transferred from the visible light emitting module 35 along the optical axis 7 for optical radio via the lens 31. The invisible light signal propagating from the camera 13X side along the optical axis 7 for optical radio is input through the lens 31 and guided to the invisible light receiving module 37 by the light guide 33.

Thus, image data that requires a high data transfer rate is propagated along the optical axis 7 via the light guide 13 by the invisible light emitted from the invisible light emitting module 15. Similarly, a camera control signal that does not require a high rate is propagated along the optical axis 7 via the light guide 33 by visible light emitted from the visible light emitting module 35.

In this case, both invisible light and visible light can propagate along the same optical axis 7 in the respective directions without interfering with each other due to different wavelengths of light. The transmission of light to the optical axis 7 and the reception of light from the optical axis 7 are performed by the light guides 13 and 33. Adjustment of the optical axis alignment at this time easily identifies the light emission direction by visual observation. Can be done with visible light. If the optical axis is aligned with visible light, the optical axis of the invisible light can be simultaneously aligned with the same optical axis 7 by the function of the light guides 13 and 33. Even when one of the light sources is invisible light and cannot be viewed, the other light source is visible light, which can be easily confirmed visually.

As described above in detail, according to the present embodiment, in the optical wireless system, image data requiring a high-speed data transfer rate transmitted from the camera 13X to the control device 140 is the invisible light emitting module 15. Is converted into invisible light and transmitted. Further, a camera control signal that is not required for a high-speed data transfer rate transmitted from the control device 140 to the camera 13X is converted into visible light by the visible light emitting module 35 and transmitted.

Depending on the data transfer rate, optical wireless communication can be performed by selecting invisible light or visible light. In this case, since the invisible light and the visible light are propagated along the same optical axis 7, the optical axis including the invisible light can be aligned by aligning the optical axis with visible light. It is not necessary to perform optical axis alignment for invisible light that cannot be seen, and optical axis alignment can be easily performed.

Here, the mark camera 130, the parts camera 132, and the camera 13X are examples of imaging devices, and the control device 140 is an example of a control device. The invisible light emitting module 15 and the invisible light receiving module 37 are examples of the first optical module, and the visible light emitting module 35 and the visible light receiving module 17 are examples of the second optical module. The invisible light emitting module 15 is an example of a first light emitting module, and is an example of a light emitting module of an imaging device. The visible light receiving module 17 is an example of a second light receiving module, and is an example of a light receiving module of the imaging apparatus. The visible light emitting module 35 is an example of a second light emitting module, and is an example of a light emitting module of a control device. The invisible light receiving module 37 is an example of a first light receiving module and an example of a light receiving module of a control device. The light guide 13 is an example of a first light guide, and the light guide 33 is an example of a second light guide. The light guide 13 is an example of a light guide of the imaging apparatus, and the light guide 33 is an example of a light guide of a control device. The optical axis 7 is an example of a first predetermined axis and a second predetermined axis that are aligned with each other.

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 case of data transmission between the camera data and the camera control signal 140 between the camera 13X and the camera control signal has been described as an example, but the present application is not limited to this. It is applied to optical wireless communication performed between an electromagnetic motor and other movable devices, a transport device 26, a mounting head 28, a moving device 30, a supply device 32, a display unit 124, and other devices not shown. be able to. That is, the data transmission rate of data transmitted bidirectionally differs greatly between these devices. The present application can be similarly applied to the case where it is sufficient that one is transmitted at a high rate and the other is a low rate.

1, 3: Optical wireless device 7: Optical axis 10: Electronic component mounting device 11, 31: Optical lens 13, 33: Light inductor 15: Invisible light emitting module 17: Visible light receiving module 19, 39: Control unit 35 : Visible light emitting module 37: Invisible

light receiving module

44, 64, 68: Electromagnetic motor 122: Display lamp 124: Display unit 130: Mark camera 132: Parts camera 13X: Camera 140: Control device 140A: Image board 142: Controller 144: Drive circuit 146: Control circuit 7A: Optical wireless signal 7B: Optical wireless signal

Claims

An optical wireless system in which an imaging device and a control device are digitally interfaced by optical wireless,
A first optical module for transmitting image data with invisible light from the imaging device to the control device;
A second optical module for transmitting a control command with visible light having a data transfer rate lower than the data transfer rate with the invisible light from the control device to the imaging device;
In the optical radio, the optical axis of the invisible light and the optical axis of the visible light coincide with each other.
The imaging device is
A first light emitting module that emits the invisible light among the first optical modules;
A second light receiving module for receiving the visible light among the second optical modules;
The invisible light emitted from the first light emitting module is guided in a direction of a first predetermined axis, and the visible light entering along the first predetermined axis is branched to the second light receiving module. With a light inductor,
The control device is
A second light emitting module that emits the visible light of the second optical module;
A first light receiving module that receives the invisible light in the first optical module;
The visible light emitted from the second light emitting module is guided in the direction of a second predetermined axis, and the invisible light entering along the second predetermined axis is branched to the first light receiving module. With a light inductor,
The optical axis alignment at the time of the optical wireless is performed between the first predetermined axis and the second predetermined axis so that the visible light emitted from the second light emitting module is received by the second light receiving module. The optical wireless system according to claim 1, wherein the optical wireless system is performed by aligning axes.
An imaging device that receives a control command from a control device through a digital interface using optical wireless and transmits image data to the control device,
A light emitting module for emitting invisible light for transmitting the image data;
A light receiving module for receiving visible light having a data transfer rate lower than that of the invisible light for transmitting the control command;
An imaging device comprising: a light guide that guides the invisible light emitted from the light emitting module in a direction of a predetermined axis and branches the visible light incident along the predetermined axis to the light receiving module. machine.
A control device that receives image data from an imaging device and transmits a control command to the imaging device through a digital interface using optical wireless,
A light emitting module for emitting visible light for transmitting the control command;
A light receiving module that receives invisible light having a higher data transfer rate than the visible light for transmitting the control command;
And a light guide for guiding the visible light emitted from the light emitting module in a predetermined axis direction and branching the invisible light entering along the predetermined axis to the light receiving module. machine.