Breimo Strip width measurement

Strip width measurement

high precision

cost-effective

non-contact

Strip width measurement with optical

sensors - insensitive to ambient light EMG Automation GmbH

does have many years of experi-

ence and expertise in the devel-opment and application of strip guiding systems and strip width measurements for the metals industry.

With regard to strip width meas-urement EMG relies on the quality and performance of the existing digital measuring sensors from the strip guiding area. By steady deve-lopments EMG made those tools suitable to meet the diverse requests.

EMG offers a wide range of system solutions: From optical measur-ing systems that are insensitive

to ambient light through mainte-nance-free inductive measuring technology up to stationary cam-era systems.

Advantages of the EMG strip width measurement are:

? precise and reliable

measuring accuracy

? short start-up time

? high availability

? ease of operation

? most up to date Feldbus

technology

? high efficiency Detecting the strip edge is realized on each side of the strip by HF alternating light measuring sensors being insensitive to ambient light. These are mounted on motor driven slides and are programmed as to steadily follow the strip edge. The absolute distance between the slides and the built-on measuring system is con-tinuously determined via a mounted digital stroke transducer.

In addition to this dynamic strip position changes are sensed in the measuring equipment and taken account of when calculating the strip width. Thus the strip width is genuinely determined in any operating condi-tion.

By using the reference measuring principle a high amount of contamination is compensated during system operation. While the measuring sensor is detecting the lateral position of the strip edges, the reference sensor is measuring the background brightness of the measur-ing spot in order to stabilize the signal sensitivity. Influences of reflected light from external sources are excluded by the use of high-frequent light transmitters. Light of a defined frequency is emitted under control and only this part of light is evaluated in the HF alter-nating light transmitters. The light transmitter is also monitored for failure.

For applications where a very high precision is demanded optimised sensor positioners with highest stroke resolu-tion and exact linear sliding properties are used.

Continuous sensing of strip width

? non-contact

Technical data

? Power supply: 100 - 240 V AC / 300 VA

? Type of protection: IP 54

? Measuring frequency: 200 Hz

? Measuring range: 50 - 3000 mm

? Resolution: 0.1 mm (0.01 mm high precision)? Measuring accuracy: +/- 0.5 mm

Automatic protective film unwinder for HF-lamp units ? Automated renewal of protective film on the lamp units ? Waiting time reduction

? Minimization of measuring errors

? Film unwinder control integrated in the control electronics of width measurement Sample sheet for calibration

with mounting

? Fast and operator-friendly

calibration

? Certified sample sheets for

calibration with detail about

thermal expansion

? Mounting supports for calibration

sheets either in measuring or parking position ? Optional extra:

non-contact strip temperature measurement with automatic width compensation

Optical strip width measurement

? Measuring system insensitive to ambient light ? Contamination compensation to a large degree by reference measuring principle

? Independent of various material thicknesses

? Measuring distance between sensor and lamp unit up to 2 m

? Bus-communication via CANopen

Optional extra

? Sample sheet for calibration with mounting ? Protective film unwinder for lamp units ? Lampholder with withdrawable slide ? Idler roll High precision optical strip width measurement

? Measuring accuracy: +/- 0.2 mm

by means of

- mechanical optimization of

sensor positioners

- idler roll (optional)

Strip width measurement with CCD-camera ? Stationary CCD-camera

? Operator-friendly operation and adjustment of CCD-camera

? Bus-communication via CANopen

? Microprocessor controlled CCD-camera with graphical display

?

Stripe measurement possible

Technical data ? Power supply: 100 - 240 V AC / 300 VA ? Type of protection: IP 54 ? Measuring frequency: 200 Hz

? Measuring range: 10 - 3000 mm, dependent on camera distance and distance to measuring level

? Resolution: 5000 / 30000 pixels ?

Graphical display: 128 x 64 pixels

? Measuring accuracy: +/- 1 mm (attainable under defined conditions)

? high precision ? cost-effective ? maintenance-free

Strip width measurement with inductive sensors

Strip width measurement

with stationary CCD-camera

Inductive strip width measurement ? Stationary measuring frame EMI

? Maintenance-free and insensitive to contamination and vapour ? Sensor opening 200 mm

?

Bus-communication via CANopen

Technical data ? Power supply: 100 - 240 V AC / 300 VA ? Type of protection: IP54 ? Measuring frequency: 200 Hz

? Measuring range: 400 - 2600 mm ? Distance of sensor to

metal components: 200 mm each side ?

Measuring accuracy: +/- 1.5 mm

(dependent on material properties)

System configuration

? LCD, four-line, illuminated background with keypad

? Keyboard for selecting the measuring points as well as for presetting the parameter values and their changing using the cursor keypad

maintained on power failure

B S T P r o M a r k T e c h n o l o g i e s , I n c . U .S .A .

E M H -E l e c t r o m e c an i c a e H i d r áu l i c a L t d a . B r a z i l

B S T I n t e r n a t i o n a l G m b H G e r m a n y

E M G ,

F a c t o r y E L T M A

G e r m a n y

B S T S a y o n a A u t o m a t i o n s P r i v a t e L t d . I n d i a

E M G A u t o m a t i o n G m b H

G e r m a n y

E M G A u t o m a t i o n (B e i j i n g ) L t d . C h i n a

E M G / S T -V / E N / S t r i p w i d t h m e a s u r e m e n t / D o k u -I n d e x : 29123-01 / 09.2006 / P r i n t e d i n G e r m a n y / S u b j e c t t o m o d i f i c a t i o n