Image acquisition system and image acquisition method

Patent metadata

Field	Value
Publication number	US-11175236-B2
Application number	US-201916567411-A
Country	US
Kind code	B2
Filing date	Sep 11, 2019
Priority date	Sep 12, 2018
Publication date	Nov 16, 2021
Grant date	Nov 16, 2021

Abstract

An image acquisition system includes a feeding unit supplying a product, a product pickup platform onto which the product is supplied by the feeding unit, and a camera capturing an image of the product on the product pickup platform. The camera identifies a position and an angle of the product based on the image. The image acquisition system includes a robot gripping the product from the product pickup platform based on the position and the angle identified by the camera and an image acquisition platform onto which the product is placed by the robot. An imaging microscope of the image acquisition system captures an image of a surface of the product facing upwards on the image acquisition platform and a computer stores the image of the surface of the product captured by the imaging microscope.

First claim

What is claimed is:

1. An image acquisition system, comprising:
a feeding unit supplying a product;
a product pickup platform including a first endless conveyor onto which the product is supplied by the feeding unit;
a camera capturing an image of the product on the product pickup platform and identifying a position and an angle of the product based on the image, the feeding unit and the first endless conveyor being switched off when the product on the first endless conveyor is moved to a predetermined position in a field of view of the camera;
a robot gripping the product from the product pickup platform based on the position and the angle identified by the camera;
an image acquisition platform onto which the product is placed by the robot; and
an imaging microscope capturing an image of a surface of the product facing upwards on the image acquisition platform.

2. The image acquisition system of claim 1 , wherein the camera captures the image of the surface of the product in a state in which the feeding unit and the first endless conveyor are switched off, and the product is gripped by the robot in the state in which the feeding unit and the first endless conveyor are switched off.

3. The image acquisition system of claim 2 , wherein the product pickup platform is adapted to detect whether the product on the first endless conveyor has been moved to the predetermined position in the field of view of the camera.

4. The image acquisition system of claim 1 , wherein the feeding unit includes:
a storage box adapted to contain the product and a vertical conveyor mechanism;
and
a vibration conveyor mechanism receiving products conveyed upwardly in the storage box and conveying the product forwards in a vibrating manner such that the product is evenly dispersed and conveyed onto the product pickup platform.

5. The image acquisition system of claim 4 , wherein the storage box has a feeding opening through which the product is loaded into the storage box.

6. The image acquisition system of claim 1 , wherein the robot moves the product on the image acquisition platform to allow each of a plurality of surfaces of the product to sequentially face upwards, so that an image of each of the surfaces of the product is captured by the imaging microscope.

7. The image acquisition system of claim 1 , wherein the imaging microscope automatically adjusts a focal length of the imaging microscope based on a size of the surface of the product and a distance between the surface of the product and the imaging microscope to allow the imaging microscope to be automatically focusable.

8. The image acquisition system of claim 1 , further comprising a display in communication with the imaging microscope to display the image captured by the imaging microscope.

9. The image acquisition system of claim 4 , further comprising an endless conveyer mechanism arranged below the product pickup platform.

10. The image acquisition system of claim 9 , wherein the product on the product pickup platform that is not gripped by the robot falls onto the endless conveyor mechanism and is conveyed into the storage box by the endless conveyor mechanism.

11. The image acquisition system of claim 10 , wherein the endless conveyor mechanism has a first end extending into the storage box to feed the product back into the storage box and a second end below an end of the product pickup platform to receive the product that falls off the end of the product pickup platform.

12. The image acquisition system of claim 11 , wherein the endless conveyor mechanism includes an endless conveyor belt, the product is carried on the endless conveyor belt and fed back into the storage box by the endless conveyor belt.

13. The image acquisition system of claim 12 , wherein an end baffle is mounted at the second end of the endless conveyor mechanism to prevent the product from falling off an end of the endless conveyor belt.

14. The image acquisition system of claim 1 , wherein the robot has a gripper to grip the product.

15. An image acquisition method, comprising the steps of:
providing an image acquisition system including a feeding unit, a product pickup platform including a first endless conveyor, a camera, a robot, an image acquisition platform, and an imaging microscope;
supplying a product onto the product pickup platform with the feeding unit;
switching off the feeding unit and the first endless conveyor when the product on the first endless conveyor is moved to a predetermined position in a field of view of the camera;
identifying a position and an angle of the product on the product pickup platform with the camera;
gripping the product from the product pickup platform with the robot based on the position and the angle identified by the camera;
placing the product gripped by the robot onto the image acquisition platform;
capturing an image of a surface of the product facing upwards on the image acquisition platform with the imaging microscope; and
storing the image captured by the imaging microscope.

16. The image acquisition method of claim 15 , wherein the capturing step includes moving the product on the image acquisition platform with the robot such that each of a plurality of surfaces of the product sequentially face upwards to allow the imaging microscope to capture an image of each of the surfaces of the product.

17. The image acquisition method of claim 15 , wherein the feeding unit includes a storage box adapted to contain the product and a vibration conveyor mechanism, the method further comprising the steps of:
receiving products conveyed from the storage box; and
conveying the product forwards in a vibrating manner such that the product is evenly dispersed and conveyed onto the product pickup platform.

18. An image acquisition system, comprising:
a feeding unit supplying a product and including:
a storage box adapted to contain the product and a vertical conveyor mechanism; and
a vibration conveyor mechanism receiving products conveyed upwardly in the storage box and conveying the product forwards in a vibrating manner such that the product is evenly dispersed and conveyed onto the product pickup platform;

a product pickup platform onto which the product is supplied by the feeding unit;
a camera capturing an image of the product on the product pickup platform and identifying a position and an angle of the product based on the image;
a robot gripping the product from the product pickup platform based on the position and the angle identified by the camera;
an image acquisition platform onto which the product is placed by the robot; and
an imaging microscope capturing an image of a surface of the product facing upwards on the image acquisition platform.

Assignees

• Tyco Electronics Shanghai Co Ltd
• Te Connectivity Corp

Inventors

• Liu Hongtao
• Zhang Dandan
• Lu Roberto Francisco-Yi
• Wang Changjun
• Zhou Lei
• Tao Zongjie

Classifications

• G01N2021/8883

  involving the calculation of gauges, generating models · CPC title

• G01N2021/845

  Objects on a conveyor · CPC title

• G01N21/8851 Primary

  Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges (G01N21/8806 and G01N21/93 - G01N21/95692 take precedence; optical measurement of dimensions G01B11/00; optical scanning G02B26/10; image transformation G06T3/00; computerised image enhancement G06T5/00; image processing per se for flaw detection G06T7/0002) · CPC title

• B65G47/90 Primary

  Devices for picking-up and depositing articles or materials · CPC title

• G01N21/8806

  Specially adapted optical and illumination features · CPC title