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USOO7915570B2

(12)

United

States

Patent

(10)

Patent

N0.:

7,915,570

Cetrulo

a].

(45)

Date

Patent:

Mar.

29,

2011

(54)

SMART

CAMERA

WITH

INTEGRATED

I‘ll;

ethql

, ,

occ

1cc 10

eta

LIGHTING

CONTROLLER

6,207,946

3/2001

Jusoh

al.

6,522,777

2/2003

Paulsen

a1.

(75)

Inventors:

Raffaele

Cetrulo,

Aust1n,

(US);

6,603,103

8/2003

Ulrich

31‘

William

Allai,

Austin,

S);

6,950,196

9/2005

Fielden

al.

' .

6,956,963

10/2005

Ulrich

a1.

3n“?

2211110}:

Aufin?s

T1?

FEES),

6,963,175

11/2005

Archenhold

a1.

f‘n“

aw,

011“

0°

’

)’

7,127,159

10/2006

Gladnick

a1.

Nlcolas

Vazquez,

Austln,

(US)

7,178,941

2/2007

Roberge

a1.

7,259,522

8/2007

Toyota

al.

(73)

Assignee:

National

Instruments

Corporation,

7,331,681

2/2008

POhleIT

31~

(Us)

7,397,550

7/2008

Hackney

al.

In,

2004/0129860

7/2004

Thibaud

al.

.............

250/205

_ _ _ _ _

2005/0236998

10/2005

Mueller

al.

(

)

Notlce:

Subject

any

d1scla1mer,

the

term

th1s

2006/0032921

2/2006

Gerst,

111

@131,

patent

extended

or adjusted

under

U.S.C.

154(b)

368

days.

OTHER

PUBLICATIONS

“Legend

540”;

DVT

Machine

Vision;

2004;

Pages.

(21)

Appl.

N0.:

12/184,931

“PresencePLUS

Vision

Sensors”;

Second

Edition;

Banner

Engineer

ing

Corp.;

2005;

Pages.

(22)

Filed;

Aug_

2008

“Cognex

Checker”;

Cognex

Corporation;

2005;

Pages.

“Cognex

DVT

LineScan

Users

Guide”;

Cognex

Corporation;

- - -

Pages;

Accessed

from

Internet

Jan.

15,

2009;

http://www.c0gnexsen

(65)

Pnor

PUbhcatlon

Data

sors.com/support/DownloadsManager.php?Order:Index&

2009/0033761

Feb.

2009

KW:DVT%20MaIlua1#~

“Cognex

MVS-8000

Series:

MVS-8100L

Hardware

Manual”;

U_s_

Application

Data

Cognex

Corporation;

Oct.

2006;

Pages.

(60)

Provisional

application

No.

60/953,889,

?led

Aug.

(continued)

2007.

Primary

Examiner

Thanh

Luu

(51)

Int.

Cl.

(74)

Attorney,

Agent,

Firm

Meyertons

Hood

Kivlin

G01J1/32

(2006,01)

Kowert

Goetzel,

P.C.;

Jeffrey

Hood

H053

37/02

(2006.01)

(52)

us.

Cl.

......................................

250/205;

315/308

(57)

ABSTRACT

(58)

Field

Classi?cation

................

250/205;

smart

camera

includes

integrated

lighting

current

con

315/308

troller

and

can

couple

one

external

light

sources.

See

application

?le

for

complete

history.

The

integrated

lighting

current

controller

can

control

and

power

the

one

external

light

sources

using

a current

(56)

References

Cited

pulse.

The

one

external

light

sources

can

provide

5,134,469

5,172,005

US.

PATENT

DOCUMENTS

12/1992

Cochran

al.

7/1992

Uchimura

.....................

348/68

illumination

for

the

smart

camera

acquire

the

image

object

under

test.

Claims,

Drawing

Sheets

Smart

Camera

111]

FPGA

750

_ _ _ _ _ _ _ _ _

_ _ _ _ _ _ _ _ _ _ _ _ _ _

I—

—

— —

— — — —

—

-|-

— —

Lighting

Controller

LQQ

I .

(752

WW7

Input

Generation

| I

758

l I

. l |

User

Light

I 00,"

Timing

38mm

: i

Settings

Generation

1L4

| |

Ligsht‘Curr’enl

l l

pain

I '

US$760

Genera?on

l—

756

Programmed

Lighlcorrent

|__________

_'____'l__“_'l'____'l'_“_'l___

sew"?

Processor

Executing

er.

Algorithm

Sequence

12:1

Inspection

Pass/Fail

Result

Summary of content (23 pages)

PAGE 1
USOO7915570B2 (12) United States Patent (10) Patent N0.: Cetrulo et a]. (45) Date of Patent: (54) SMART CAMERA WITH AN INTEGRATED 2 , LIGHTING CONTROLLER _ (75) Inventors: Raffaele A. Cetrulo, Aust1n, TX (US); William M. Allai, Austin, TX (U S); - ' . Assignee: National Instruments Corporation, A t- TX (Us) Notlce: _ _ 2/2003 8/2003 Ulrich et 31‘ 9/2005 Fielden et al. _ Paulsen et a1. Ulrich et a1. 2/2007 Roberge et a1. 7,259,522 B2 8/2007 Toyota et al.
PAGE 2
US 7,915,570 B2 Page 2 OTHER PUBLICATIONS “PD2-1012iPD2 Series Digital Type”; CCS; 2006; Accessed from Internet at http://WWW.ccs-inc.cojp/cgi-bin/hp.cgi?menu:102-201 “Installing the In-Sight 3000”; CogneX Corporation; 2002; 43 Pages. “In-Sight Strobe Light Adapter Installation & Reference”; CogneX Corporation; 2002; 18 Pages. “Tech Note: Connecting a Strobe Device to the In-Sight 1000 and 4000 Series Vision Sensors”; CogneX Corporation; 2003; 12 Pages.
PAGE 3
US. Patent Mar. 29, 2011 Sheet 1 0f 11 US 7,915,570 B2 Em25u:8tug2s N2£9562 we F 5c:o?8c2i 1/9: 2 F @268% v.
PAGE 4
US. Patent Mar. 29, 2011 Sheet 2 0f 11 US 7,915,570 B2 1021‘ 1 10 —\ Sma? Camera 192 JEEEEEEEEQEEEQ W @ %W@ , w @ FIG.
PAGE 5
PAGE 6
US. Patent Mar.
PAGE 7
US. Patent Mar. 29, 2011 Sheet 5 0f 11 US 7,915,570 B2 "FIG.
PAGE 8
US. Patent Mar. 29, 2011 Sheet 6 0f 11 FIG.
PAGE 9
US. Patent Mar. 29, 2011 Sheet 7 0f 11 US 7,915,570 B2 2520 .2 m0,me _g_I I_g0520:02_00 O20.6:0 ? n Ig00082_ 2\0WWW _0_@3.0 :82m02 0.03 g__| _ _ _|_E5tFS0E.5I0 0.5|0ch _ I<02?_ nmm0Fn20 025;02 __03.0 25 ,$025me0 4/0: _0I2 02 1 mII4o_Im8502h0m8:é|_gI 1| | _ m _02 90 2 _$005I_ _025m0_2m0 00m_00w_ @_08I02 $d20aQ§5>E0 .
PAGE 10
PAGE 11
US. Patent Mar. 29, 2011 US 7,915,570 B2 Sheet 9 0f 11 S3m5u8cg3i$:55BEm=u§<1Mm¢QwS§m58N=%3S$»m?IQ |n _ _ _ _ n _ a _= _ “ _ _2&8 sq: w\la$88:25 _ H _ Q: E _ _ Egon_H_mm“I. at:55 511% »m o?| 1_ :_91\ 3at_ 8 \QQQa "1% 5:3: @250 1_ 1_1 +1 SE:_EgoQQEmw 1" __ $3_wson“ Em: pam4/ 1cg_sn oEn __ Essmm _ " om“H 1\ _§ 1_ “1E_ESQEQ _QRcg_Em:zm_w | coh?mwmw EEG2g g =21 $35 E58_ H1__1 W1Em:El_HI21.-H3l101l 1l1? E$8mgu \ _m_gQEsNSmQwEQE w u_32F1GNE%._9:1sz m$32m=é< 2.
PAGE 12
US. Patent Sheet100f11 B4ar.
PAGE 13
PAGE 14
US 7,915,570 B2 1 2 SMART CAMERA WITH AN INTEGRATED LIGHTING CONTROLLER factors such as ambient light conditions and required expo sure time. Existing lighting current controllers generally use PRIORITY CLAIM Various existing approaches to use light sources with a cam linear power supply designs which are bulky, heavy, and hot. era in machine vision/ image processing applications are described below.
PAGE 15
US 7,915,570 B2 3 4 be controlled by a control loop on the input on the power supply. During intervals when it is desirable not to send any current through the light source, the light source may be contrary, the intention is to cover all modi?cations, equiva lents and alternatives falling within the spirit and scope of the present invention as de?ned by the appended claims. disconnected from the output of the switching power supply.
PAGE 16
US 7,915,570 B2 6 5 back sides. Therefore, the smart camera 110 may include a The smart camera 110 may include a memory medium on housing having a plurality of sides and a lens directly attached to the housing for acquiring an image of an object. In some which computer programs, e. g., text based or graphical pro grams, may be stored.
PAGE 17
US 7,915,570 B2 7 8 on an acquired image. It should be noted that this embodiment is meant to be illustrative only, and is not intended to limit the architecture, components, or form of the smart camera 110. The embodiment of the smart camera 110 illustrated in FIG. 5A may include an imager 282 and a lens 280. The smart camera may also include a functional unit 106, which may comprise a programmable hardware element 206, e.g.
PAGE 18
US 7,915,570 B2 9 10 FIG. 5B). The one or more image buffers 722 may be a part of circuit, this voltage may decay with time, and may cause an incorrect current to be sent through the light source, which in an FPGA/processing unit 206. The data from the image buff turn may cause a bad exposure and/or damage the light source 606. ers may then be used by a separate processor, such as the processor 212 of FIG. SE, to perform an algorithm/image processing/machine vision application.
PAGE 19
US 7,915,570 B2 11 12 sources by allowing direct control of the current output. Thus point for the one or more control values of the control loop is held, and thus the lighting current controller would take con siderably less time to get back to the desired control current overdriving of a light source may occur when the light source is driven with more current than would normally be appro (e.g., the current pulse). priate for a regular continuous operation.
PAGE 20
US 7,915,570 B2 13 14 across a de?ned range, which may act as a set point for the or more light sources) may be disconnected to prevent the maintenance strobes from being noticeable to the user. current regulator (see element 860 of FIG. 7A) in order to control the output current (i.e., the current pulse) on the load (i.e., the one or more light sources). This voltage may be mapped to output currents between 0 and full scale.
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