JP6134160B2 - Camera photographing method and camera photographing system - Google Patents

Description

  The present invention relates to a camera photographing method in a camera photographing system in which a plurality of photographing objects are arranged in parallel, and an independent lighting device and camera are arranged for each of the photographing objects, and camera photographing for implementing the camera photographing method. About the system.

  An electronic component mounting apparatus is known as an apparatus provided with such a camera photographing system. The electronic component mounting apparatus uses a head unit equipped with a plurality of suction nozzles for sucking electronic components in parallel, sucks the electronic components from the component supply unit, transfers them to the printed circuit board, and mounts them at predetermined positions on the printed circuit board. . In such an electronic component mounting apparatus, in order to prevent defective components from being mounted, misaligned, or mounting errors (not mounted), the suction nozzles are mounted after the electronic components are sucked and mounted on the printed circuit board. An image of the tip portion is imaged and the presence / absence of a component or the suction state of the component is recognized (for example, Patent Document 1).

  As a camera photographing system for that purpose, a type in which an independent lighting device and camera are arranged for each photographing object (electronic component) may be used. In the electronic component mounting apparatus, different types of electronic components may be adsorbed to a plurality of suction nozzles, and in this case, since the optimal illumination conditions differ for each electronic component, if the above type of camera photographing system is used, The electronic component can be photographed by a camera corresponding to the optimal illumination condition for each electronic component.

  However, in this camera photographing system, since photographing objects (electronic parts) are arranged in parallel, illumination light from an illumination device corresponding to the photographing object may reach the adjacent photographing object. If it does so, the illumination light from the illuminating device which respectively respond | corresponds between adjacent imaging | photography objects will mutually influence, As a result, it will become impossible to image | photograph an imaging | photography object on optimal illumination conditions.

  The problem of the mutual influence of the illumination light between the adjacent imaging objects is that the directivity of the illumination light from the illumination device is sharpened, the illumination light only affects the corresponding imaging object, and the adjacent imaging object However, in this case, the uniformity of the illumination light with respect to the corresponding object to be photographed deteriorates, and there arises a problem that the vicinity of the center of the object to be photographed is bright but the periphery is dark.

JP-A-8-167799

  A problem to be solved by the present invention is a camera photographing system in which a plurality of photographing objects are arranged in parallel and an independent lighting device and camera are arranged for each of the photographing objects. It is possible to efficiently implement the camera photographing method that can efficiently photograph each photographing object while solving the problem of the mutual influence of the illumination light and ensuring the uniformity of the illumination light with respect to the photographing object, and the camera photographing method. It is to provide a camera photographing system.

  According to one aspect of the present invention, there is provided a camera photographing method in a camera photographing system in which a plurality of photographing objects are arranged in parallel, and an independent illumination device and camera are arranged for each of the photographing objects. The shooting object is divided into a plurality of groups so that adjacent shooting objects are not included in the group, and the illumination device is adjacent to the shooting object corresponding to the lighting device. The illuminating target object is illuminated with directivity that does not reach otherwise, and for each of the groups, a time difference is provided in the timing of illumination and photographing by the illumination device and the camera. A camera photography method is provided.

According to another aspect of the present invention, there is provided a camera photographing system for performing the camera photographing method of the present invention, wherein the camera controller controls the photographing operation of each camera so as to photograph with a time difference for each group. A lighting controller for controlling the lighting operation of each lighting device;
A synchronization signal line that directly connects the camera controller and the lighting controller, and the camera controller outputs a synchronization signal that causes only a lighting device corresponding to a camera belonging to a group that performs a shooting operation to perform a lighting operation. There is provided a camera photographing system that transmits to the illumination controller via a synchronization signal line, and the illumination controller performs illumination operation of the corresponding illumination device in synchronization with the photographing operation of the camera based on the synchronization signal.

  According to the camera photographing method of the present invention, a plurality of photographing objects arranged in parallel are divided into a plurality of groups so that adjacent photographing objects are not included in the group. In addition, for the illumination device, the illumination light illuminates the photographic object corresponding to the illuminator and the photographic object adjacent to the photographic object, and has directivity that does not reach otherwise. Set its directivity. Then, for each group, a time difference is provided in the timing of illumination and photographing by the illumination device and the camera. The group does not include adjacent objects to be photographed, so lighting and photographing in units of groups eliminates the problem of the influence of illumination light between adjacent objects to be photographed. Compared to the case of performing illumination and shooting in units of objects, the number of times of illumination and shooting can be reduced, and camera shooting can be performed efficiently. In addition, the illumination light of the illumination device extends to the corresponding object to be photographed and the object to be photographed adjacent to it, and has a directivity that does not reach otherwise. The uniformity of the illumination light with respect to the object to be photographed can be ensured while solving the problem of mutual influence.

  On the other hand, according to the camera photographing system of the present invention, the synchronization signal between the camera controller that controls the photographing operation of each camera so as to photograph with a time difference for each group and the lighting controller that controls the lighting operation of each lighting device. The camera controller directly transmits a synchronization signal for performing the illumination operation only to the illumination device corresponding to the camera belonging to the group that performs the photographing operation to the illumination controller through the synchronization signal line. That is, the synchronization signal is normally generated by the camera controller and transmitted directly to the illumination controller without passing through another control unit such as a main control unit in the camera photographing system. Can be implemented. Moreover, since the burden on the main control unit is reduced and the processing speed is improved, the camera photographing method of the present invention can be efficiently implemented as the entire camera photographing system.

It is explanatory drawing which shows notionally one Example of the camera imaging | photography method of this invention. It is explanatory drawing which shows the comparative example with respect to the Example of FIG. 1 is a system configuration diagram showing an embodiment of a camera photographing system of the present invention.

  Embodiments of the present invention will be described below based on examples shown in the drawings.

  FIG. 1 is a conceptual diagram showing an embodiment of a camera photographing method of the present invention. In the figure, four photographing objects (electronic parts) 1a to 1d are arranged in parallel, and independent lighting devices 2a to 2d and cameras 3a to 3d are arranged for the photographing objects 1a to 1d. . And about the illuminating devices 2a-2d, the illumination light is orthogonal to the sequence direction of the imaging | photography object 1a-1d, and the illuminating light corresponds to the imaging | photography object corresponding to the said illuminating device, and the imaging | photography target object adjacent to this. Therefore, the directivity is set so as to illuminate with the directivity that does not reach otherwise. For example, the illumination light from the illuminating device 2b extends to the photographic object 1b corresponding to the illuminating device 2b and the photographic objects 1a and 1c adjacent thereto, and does not reach the other photographic objects 1d.

  In such a configuration, in the present invention, the photographing objects 1a to 1d are divided into a plurality of groups so that adjacent photographing objects are not included in the group. In this embodiment, two groups, that is, photographing objects The first group consisting of objects 1a and 1c and the second group consisting of objects 1b and 1d are grouped. Then, for each of these groups, a time difference is provided in the timing of illumination and photographing by the illumination devices 2a to 2d and the cameras 3a to 3d. Specifically, in this embodiment, the first group and the second group described above are provided with a time difference to alternately perform camera shooting. That is, only the illumination devices 2a and 2c and the cameras 3a and 3c corresponding to the photographing objects 1a and 1c are operated at the photographing timing of the first group, and the photographing objects 1b and 1d are corresponded at the photographing timing of the second group. Only the illumination devices 2b and 2d and the cameras 3b and 3d to be operated are operated to perform illumination and photographing, respectively.

  In FIG. 1, the solid line schematically shows the distribution of illumination light at the photographing timing of the first group, and the broken line schematically shows the distribution of illumination light at the photographing timing of the second group. In FIG. 1, the vertical direction represents the brightness of the illumination light. In this embodiment, illumination light with a brightness level of 2 is applied to the shooting objects 1a and 1c belonging to the first group, and illumination light with a brightness level of 5 is applied to the shooting objects 1b and 1d belonging to the second group. In each case, the illumination devices 2a and 2c irradiate illumination light with a brightness level of 2, and the illumination devices 2b and 2d emit illumination light with a brightness level of 5.

  As shown in FIG. 1, the illumination light between adjacent photographing objects is obtained by performing illumination and photographing in the first and second group units with the above-mentioned directivity given to each illumination light. The problem of mutual influence is solved, and the uniformity of illumination light with respect to the object to be imaged can be secured.

  FIG. 2 is an explanatory view showing a comparative example with respect to the embodiment of FIG. In the comparative example of FIG. 2, the same reference numerals are given to the components corresponding to the embodiment of FIG. In the comparative example of FIG. 2, the directivity is set so that the illumination light of the illuminating devices 2a to 2c only reaches the photographic object corresponding to the illuminating device and does not reach the adjacent photographic object. Similar to the embodiment of FIG. 1, it is divided into a first group and a second group, and the illumination objects 2a to 2d and the cameras 3a to 3d are provided with a time difference in the illumination and photographing timing for each group, thereby adjacent photographing objects. The problem of the mutual influence of illumination light between them is eliminated. However, in the comparative example of FIG. 2, the illumination light of the illuminating devices 2a to 2c is only applied to the photographic object corresponding to the illuminating device and does not reach the adjacent photographic object. As described above, the uniformity of the illumination light with respect to each of the photographing objects 1a to 1d deteriorates, and there arises a problem that the vicinity of the center of the photographing object is bright but the periphery is dark.

  On the other hand, in the directivity of the illumination light of the illuminating devices 2a to 2d as in the embodiment of FIG. 1, if proper grouping is not performed, there arises a problem of mutual influence of illumination light between adjacent photographing objects. Further, if illumination and photographing are performed in units of individual photographing objects 1a to 1d without grouping, the problem of mutual influence of the illumination light does not occur. In this case, four times of illumination and photographing are performed. This is inefficient.

  Here, in the embodiment of FIG. 1, four imaging objects 1a to 1d are arranged in parallel and divided into two groups, but the number of imaging objects and the number of groups are limited to this. For example, when the number of objects to be photographed is large, it can be divided into three groups. Of course, in this case as well, grouping is performed so that adjacent photographing objects are not included in one group. However, in the present invention, since a time difference is provided in the timing of illumination and photographing by the illumination device and the camera for each group, as the number of groups increases, the time until camera photographing of all photographing objects is completed becomes longer. Therefore, in the present invention, the number of groups is most preferably 2. When the number of groups is two, the method of grouping is to inevitably divide imaging objects arranged in parallel alternately into the first group and the second group along the arrangement direction. Become. In order to obtain the effect of improving the efficiency of camera shooting by the grouping described above, it is premised that at least two shooting objects belong to at least one group among the plurality of groups. From this point, The camera photographing method of the present invention is preferably applied when there are three or more parts to be photographed.

  FIG. 3 is an example of a system configuration diagram of the camera photographing system of the present invention for carrying out the camera photographing method of the present invention shown in FIG.

  The camera photographing system of FIG. 3 includes a camera controller 4, a camera control unit 5, a lighting controller 6, a lighting control unit 7, and a main control unit 8 in addition to the cameras 3a to 3d and the lighting devices 2a to 2 shown in FIG. Furthermore, a synchronization signal line 9 directly connected to the camera controller 4 and the illumination controller 6 is provided.

  The main control unit 8 controls the camera control unit 5 and the illumination control unit 7 to perform overall control of the camera system and the illumination system of the camera photographing system. The camera control unit 5 issues a command for starting the camera photographing operation to the camera controller 4. Upon receiving this command, the camera controller 4 controls the photographing operation by the cameras 3a to 3d. In particular. The photographing operation of each of the cameras 3a to 3b is controlled so as to photograph with a time difference for each of the first and second groups described above, and the illumination operation is performed only on the illumination device corresponding to the camera belonging to the group that performs the photographing operation. A synchronization signal for execution is directly transmitted to the illumination controller 6 through the synchronization signal line 9. Based on this synchronization signal, the illumination controller 6 executes the illumination operation of the corresponding illumination device in synchronization with the shooting operation of the camera. The illumination conditions such as the brightness of the illumination light are transmitted from the illumination control unit 7 to the illumination controller 6 in advance.

  As described above, in the camera photographing system of the present invention, the timing of the photographing operation is controlled by the time difference between the cameras 3a to 3d, and the generation of the synchronization signal for synchronizing the lighting operations of the lighting devices 2a to 2d in accordance with this timing. The camera controller 4 is functionally independent of the main control unit 8 and the camera control unit 5, and the synchronization signal is directly transmitted to the illumination controller 6 without passing through another control unit. Accordingly, the camera photographing method of the present invention can be smoothly implemented, the burden on the main control unit 8 and the like is reduced, and the processing speed is improved. Therefore, the camera photographing method of the present invention is efficiently implemented as the entire camera photographing system. it can.

1a to 1d Imaging target parts 2a to 2d Illumination device 3a to 3d Camera 4 Camera controller 5 Camera controller 6 Illumination controller 7 Illumination controller 8 Main controller

Claims (3)

A camera photographing method in a camera photographing system in which a plurality of photographing objects are arranged in parallel, and an independent lighting device and camera are arranged for each of these photographing objects,
Dividing the plurality of shooting objects into a plurality of groups so that adjacent shooting objects are not included in the group,
The illuminating device illuminates the illuminating light on the photographic object corresponding to the illuminating apparatus and the photographic object adjacent to the photographic object with directivity that does not reach otherwise,
A camera photographing method characterized in that a time difference is provided for the illumination and photographing timing of the illumination device and camera for each group.   The camera photographing method according to claim 1, wherein the number of groups by grouping is two. A camera photographing system that implements the camera photographing method according to claim 1 or 2,
A camera controller that controls the shooting operation of each camera so as to shoot with a time difference for each group;
A lighting controller for controlling the lighting operation of each lighting device;
A signal line for synchronization directly connecting the camera controller and the lighting controller;
The camera controller transmits a synchronization signal for performing an illumination operation only to an illumination device corresponding to a camera belonging to a group that performs a shooting operation to the illumination controller via the synchronization signal line,
The illumination controller is configured to execute a lighting operation of a corresponding lighting device in synchronization with a shooting operation of the camera based on the synchronization signal.

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