This application is a National Stage of International Patent Application No. PCT/JP2018/020913, filed May 31, 2018, the entire contents of which is incorporated herein by reference.

BACKGROUND

Technical Field

This disclosure relates to a technique for recognizing a component by imaging the component by a camera.

Background Art

Conventionally, a component mounter for mounting a component sucked by a mounting head on a board is known. In such a component mounter, the component is mounted in accordance with mounting data representing component information such as the size of the component. Particularly, JP2002-050895 describes a technique for associating and storing an original image of a component and component information in advance in the database, and generating mounting data by extracting component information from a database by comparing an image obtained by a component mounter imaging a component to the original image of the database. The component mounter can suck the component by a mounting head and mount the component on a board based on the mounting data generated in this way.

However, in such a component mounter, the mounting of the component may fail since the mounting head is not properly sucking the component. Accordingly, component recognition for recognizing the component based on the image obtained by imaging the component by a camera is performed as appropriate. In this component recognition, whether or not the component is properly sucked by the mounting head is judged, for example, based on a comparison of a size of the component included in the image and an allowable value. Particularly, JP2011-211088 shows a technique for adjusting an allowable value of a component size based on an image captured in component recognition.

SUMMARY

The component recognition is performed based on a result of an image processing using a threshold value for a luminance of an image captured while light is irradiated to the component from an illuminator. A condition on such a luminance of an image (luminance related condition), i.e. a combination of a brightness of the light of the illuminator and the threshold value used in the component recognition, is set in advance before the start of the component recognition and the component mounter performs the component recognition using this luminance related condition.

However, there have been cases where the accuracy of the component recognition in component mounting is reduced since the luminance related condition set before the start of the component recognition does not correspond to a component to be actually mounted. Such a reduction in the accuracy of the component recognition becomes a factor for erroneously judging that the posture of the component or the component itself is not suitable for mounting although the component is an aimed component and the component having a proper shape is properly sucked.

This disclosure was developed in view of the above, and aims to provide a technique capable of obtaining a proper luminance related condition corresponding to a component to be actually mounted.

A recognition parameter optimization device according to the disclosure, comprises a communication unit that receives image data obtained in a component mounter that performs component recognition to recognize a component based on a result of performing an image processing for a luminance indicated by the image data, which is obtained by imaging the component by a camera while irradiating light to the component from an illuminator, using a threshold value and mounts the component on a board based on a result of the component recognition; a storage that stores the image data received by the communication unit; and an arithmetic unit that optimizes a luminance related condition indicating a combination of a brightness of the light of the illuminator and the threshold value used in the component recognition based on the image data stored in the storage and stores an optimized luminance related condition in the storage.

A recognition parameter optimization method according to the disclosure, comprises receiving image data by a communication unit, the image data being obtained by a component mounter that performs component recognition to recognize a component based on a result of performing an image processing for a luminance indicated by the image data, which is obtained by imaging the component by a camera while irradiating light to the component from an illuminator, using a threshold value and mounts the component on a board based on a result of the component recognition; a storing the image data received by the communication unit in a storage; and optimizing a luminance related condition indicating a combination of a brightness of the light of the illuminator and the threshold value used in the component recognition based on the image data stored in the storage and storing an optimized luminance related condition in the storage.

In the thus configured disclosure (recognition parameter optimization device, recognition parameter optimization method), the image data obtained by imaging the component in the component recognition when the component mounter mounts the component on the board is stored in the storage, and the luminance related condition is optimized based on this image data. Therefore, a proper luminance related condition corresponding to a component to be actually mounted can be obtained.

The recognition parameter optimization device may be configured so that the storage stores the image data in association with an attribute of the image data, the attribute is distinguished at least by a type of the component included in the image data, and the arithmetic unit optimizes the luminance related condition in performing the component recognition for the type of the component corresponding to the same attribute based on a plurality of pieces of image data having the same attribute. In such a configuration, a proper luminance related condition corresponding to the type of the component to be actually mounted can be obtained.

The recognition parameter optimization device may be configured so that the attribute is distinguished by a combination of the type of the component and at least one of a manufacturer of the component as a target of the component recognition, the camera used in the component recognition, and the component mounter having performed the component recognition. In such a configuration, a proper luminance related condition corresponding to the manufacturer of the component as a target of the component recognition, the camera used in the component recognition or the component mounter having performed the component recognition and the like can be obtained.

The recognition parameter optimization device may be configured so that the arithmetic unit transmits the luminance related condition optimized based on the image data having the attribute received by the communication unit to the component mounter via the communication unit, if the communication unit receives the attribute of the image data planned to be obtained in the component recognition. In such a configuration, by transmitting the attribute of the image data planned to be obtained in the component recognition to the recognition parameter optimization device, the luminance related condition optimized according to this attribute can be transmitted to the component mounter. Therefore, the component recognition planned to be performed can be performed on the luminance related condition corresponding to the attribute of the image data of the component planned to be obtained in the component recognition.

The recognition parameter optimization device so that the arithmetic unit transmits the luminance related condition optimized based on the image data having a predetermined relationship with the image data received by the communication unit to the component mounter via the communication unit, if the communication unit receives the image data obtained by the component mounter imaging the component before start of the component recognition. In such a configuration, by obtaining image data by imaging the component before the start of the component recognition and transmitting the obtained image data to the recognition parameter optimization device, the component mounter can receive the luminance related condition optimized based on the image data having the predetermined relationship with the transmitted image data. Therefore, the component mounter can start the component recognition in component mounting on the luminance related condition corresponding to the component to be actually mounted.

The recognition parameter optimization device may be configured so that the arithmetic unit transmits the luminance related condition optimized based on the image data similar to the image data received by the communication unit to the component mounter via the communication unit. In such a configuration, the component mounter can properly start the component recognition based on the luminance related condition optimized based on the image data similar to the image data of the component obtained before the start of the component recognition.

The recognition parameter optimization device may be configured so that the communication unit receives the image data obtained before the start of the component recognition by the component mounter imaging the component on a predetermined illumination condition of irradiating light of a predetermined brightness from the illuminator.

The recognition parameter optimization device may be configured so that the storage stores the image data, equivalent to a case where the image data obtained on the luminance related condition is obtained on the predetermined illumination condition, as reference image data in association with the luminance related condition, and the arithmetic unit transmits the luminance related condition associated with the reference image data similar to the image data received by the communication unit to the component mounter via the communication unit. In such a configuration, the recognition parameter optimization device can precisely transmit a proper luminance related condition to the component mounter based on the image data obtained by the component mounter imaging the component on the predetermined illumination condition.

The recognition parameter optimization device may be configured so that the storage stores the image data used in optimizing the luminance related condition and the luminance related condition in association, the arithmetic unit transmits the luminance related condition associated with the image data satisfying a predetermined collation condition as a result of collating the image data received by the communication unit and the image data associated with the luminance related condition to the component mounter via the communication unit, and the collation condition is a condition on which adjusted image data generated by adjusting a luminance of the image data received by the communication unit according to a difference between the predetermined illumination condition and the luminance related condition associated with the image data to be collated and the image data to be collated are similar. In such a configuration, the recognition parameter optimization device can precisely transmit a proper luminance related condition to the component mounter based on the image data obtained by the component mounter imaging the component on the predetermined illumination condition.

The recognition parameter optimization device may be configured so that the component is recognized in the component recognition based on a comparison of the component extracted from the image data using the threshold value of the luminance related condition and a component related condition on a configuration of the component, and the arithmetic unit optimizes the component related condition based on the configuration of the component extracted from the image data using the threshold value of the optimized luminance related condition and stores an optimized component related condition in the storage. In such a configuration, the component related condition corresponding to the optimized luminance related condition can be obtained.

A component mounting system according to the disclosure, comprises: a component mounter that performs component recognition to recognize a component based on a result of performing an image processing for a luminance indicated by the image data, which is obtained by imaging the component by a camera while irradiating light to the component from an illuminator, using a threshold value and mounts the component on a board based on a result of the component recognition; and the recognition parameter optimization device described above. Therefore, it is possible to suppress a reduction in the accuracy of the component recognition due to an improper luminance related condition on a luminance of an image obtained by imaging a component.

According to the disclosure, it is possible to obtain a proper luminance related condition corresponding to a component to be actually mounted.

