Work machine and method for determining polarity

Patent metadata

Field	Value
Publication number	US-11219150-B2
Application number	US-201816772993-A
Country	US
Kind code	B2
Filing date	Jan 10, 2018
Priority date	Jan 10, 2018
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

A work machine includes a control device including a lead position detecting section to detect a lead position which is positions of a pair of leads based on imaged data imaged by an imaging device, a first detecting region setting section to set, based on the lead position detected by the lead position detecting section, a first detecting region outside the pair of leads including a part of a bottom section outside the pair of leads, a second detecting region outside the pair of leads, being opposed to the first detecting section across the pair of leads including a part of the bottom section, and a polarity determining section configured to determine the polarity of the pair of leads based on whether the mark portion exists in each of the first detecting region and the second detecting region.

First claim

The invention claimed is:

1. A work machine comprising:
a head section configured to hold and move a lead component with having a main body section, a pair of leads provided at a bottom section of the main body section, and a mark portion indicating a polarity of the pair of leads;
an imaging device configured to image the bottom section of the lead component held by the head section; and
a control device, the control device comprises:
a lead position detecting section configured to detect, based on imaged data imaged by the imaging device, a lead position which is positions of the pair of leads;
a first detecting region setting section configured to set, based on the lead position detected by the lead position detecting section, a first detecting region constituting a region outside the pair of leads with including a part of the bottom section;
a second detecting region setting section configured to set a second detecting region constituting a region outside the pair of leads, being opposed to the first detecting region across the pair of leads, with including a part of the bottom section; and
a polarity determining section configured to determine the polarity of the pair of leads based on whether the mark portion exists in each of the first detecting region and the second detecting region.

2. The work machine according to claim 1 ,
wherein the first detecting region setting section sets multiple first detecting regions, the first detecting regions being disposed in different positions from each other,
wherein the second detecting region setting section sets multiple second detecting regions, the second detecting regions being disposed in different positions from each other, and
wherein the polarity determining section determines the polarity of the pair leads based on whether the mark portion exists in each of the multiple first detecting regions and the multiple second detecting regions.

3. The work machine according to claim 2 , wherein upon determination being made such that an average luminance brightness of at least one first detecting region of the multiple first detecting regions is corresponding to a predetermined luminance brightness value, the polarity determining section determines that the mark portion exists in the at least one first detecting.

4. The work machine according to claim 1 , wherein upon determination being made such that an average luminance brightness of the first detecting region differs from an average luminance brightness of the second detecting region, the polarity determining section determines that the mark portion exists in the first detecting region or the second detecting region.

5. The work machine according to claim 1 ,
wherein the lead position detecting section detects distal end positions which are positions of respective distal ends of the pair of leads as the lead position based on the imaged data, and
wherein the first detecting region setting section determines a center position of the bottom section based on the distal end positions detected by the lead position detecting section, and sets the first detecting region based on the distal end positions and the center position.

6. The work machine according to claim 1 , wherein upon determination being made such that the polarity resulting from the determination is reversed to the polarity set in advance, the polarity determining section causes the head section to rotate reversely the main body section so that positions of the pair of leads are exchanged.

7. The work machine according to claim 1 , wherein upon determination being made such that the mark portion exists neither in the first detecting region nor in the second detecting region, the polarity determining section executes at least one of processes among a process of discarding the lead component and a process of informing of an error.

8. A method for determining polarity for a work machine comprising a head section configured to hold and move a lead component with having a main body section, a pair of leads provided at a bottom section of the main body section, and a mark portion indicating polarity of the pair of leads, and an imaging device configured to image the bottom section of the lead component held by the head section; the method for determining polarity being configured to determine the polarity of the pair of leads,
the method comprising;
a lead position detecting step of detecting, based on imaged data imaged by the imaging device, a lead position which is positions of the pair of leads;
a first detecting region setting step of setting, based on the lead position detected by the lead position detecting step, a first detecting region constituting a region outside the pair of leads with including a part of the bottom section;
a second detecting region setting step of setting a second detecting region constituting a region outside the pair of leads, being opposed to the first detecting region across the pair of leads with including a portion of the bottom section outside the pair of leads; and
a polarity determining step of determining the polarity of the pair of leads based on whether the mark portion exists in each of the first detecting region and the second detecting region.

Assignees

• Fuji Corp

Inventors

• Suzuki Hiromi

Classifications

• H05K13/0812 Primary

  the monitoring devices being integrated in the mounting machine, e.g. for monitoring components, leads, component placement · CPC title

• H05K13/08 Primary

  Monitoring manufacture of assemblages · CPC title

• G01R31/2813

  Checking the presence, location, orientation or value, e.g. resistance, of components or conductors (orientation of the DUT with respect to the test fixture G01R1/06705) · CPC title

• H05K13/003

  Placing of components on belts holding the terminals · CPC title

• G01R31/70

  Testing of connections between components and printed circuit boards (G01R31/68 takes precedence) · CPC title