1. Linescanner MP150
Infrared Temperature Measurement for Quality Control and Process Automation
Raytek Confidential
10/2010, Rev. B

2. Highlights Real-time thermal imaging to 150 Hz
Up to 1024 data points per line
Built-in Ethernet TCP/IP
Optical resolution up to 150:1
User-configurable 4-20 mA analog outputs
Internal line laser for alignment
Rugged waterproof IP65 housing
Built-in water cooling
Built-in air purge
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3. Typical Applications Paper Glass Plastic Metal Rotary Kilns
Application oriented MP150 System Packages: TF150, GS150, EC150, ES150, CS210
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4. Point Sensor vs. Linescanner
Point sensor measures one temperature point
Linescanner measures multiple measurement points (pixel) per line
Running Process
2 dimensional image =
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5. Functional Description
Lens focuses the radiation to the IR sensor
IR detector Converts the radiant energy into an electrical signal
Rotating motor drives the mirror
Mirror reflects the radiation to the lens
90°
Reference
blackbody compensates internal temp.
IR radiation
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6. MP150 Front View Integrated Air Purge Multiple Mounting Surfaces
90° Field of View
Built-in Laser
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7. MP150 Rear Panel View Laser On LED Cooling Water Connection Power LED
Air Purge Connection
Ethernet Connection DIN-4
Power Supply
Analog Outputs
RS485 Interface
Alarm/Trigger
Answers:
1:1 replacement for old scanners in the field
Communication channel in case of „lost“ IP address
The scanner provides Ethernet communications.
Which sense makes the RS485 interface?
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8. High Temperature Enclosure
Too late ...
Protect linescanner in harsh environments
Extend ambient temperature range to 1100°C (2000°F)
Modular system for optimized performance
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9. High Temperature Enclosure
Vortex Cooler
Internal Cooled Plate
Support Brackets
Shutter
Base Plate
External Insulating Shield + External Water Cooled Shield
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10. High Temperature Enclosure
Flat Glass
Continous Casting
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11. MP150: Models Designed for typical manufacturing processes
LT - Low Temperatures (3.0 to 5.0 micron), 20 to 350°C
MT - Medium Temperature (3.9 micron), 100 to 800°C
G5 - Glass (5.0 micron), 100 to 950°C
P3 - Thin Film Plastics - (3.43 micron), 30 to 250°C and 100 to 350°C, polyethylene, polypropylene
1M - High Temperatures (1.0 micron), 600 to 1200°C
2M – Steel (1.6 micron), 400 to 950°C
Answer: LT Scanner runs at 3 to 5 µm instead of 8 to 14 µm
The Raytek LT point sensors provide lower temperatures down to -40°C. Why does the MP150 LT start at 20°C only?
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12. Changes from MP50 to MP150 Increased data points from 256 to 1024
New electronics permit more data collection
Hz, Hz, Hz
Maximum scan speed from 48 Hz to 150 Hz
New motor, motor control & encoder, new rotating mirror
Select speed from 20 Hz to 150 Hz in multiple steps
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13. Changes from MP50 to MP150
Increased optical resolution from 100:1 to 150:1
New design of the optical channel
Increased resolution from 8 bit to 16 bit
New A/D converter
Line-laser moved inside
Laser module fully protected by scanner housing
Activated via software
Standard with all scanners
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14. Changes from MP50 to MP150 Ethernet TCP/IP Communication
New high speed communication protocol
DIN 4-pin connector on unit to maintain IP65 rating on scanner
Supplied cable has DIN-4 pin on one end and RJ45 on the other
Start-up time extended!
Typically 20 s needed before starting the mirror rotation
Time required for booting the operating system
MP150 fully backwards compatible to MP50!
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15. Scanning a Line 90° FOV D = ½ L
See Excel Tool: Spot Size Calculator
150 line scans
per second D L
Elliptical spot
at edge
Circular spot
in middle
90° FOV D = ½ L
FOV
Answer: 1.5 m (plus 10% adder for any misalignments or process variations)
A process width of 3 m needs to be monitored.
What is the minimal mounting distance for the scanner?
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16. Scanning a Line d ... distance between measured lines
Scan Line
d ... distance between measured lines
Process Speed 1,5 m/s
Answer: min 50 Hz
A process runs at 30 m/min. The distance between measured lines is allowed to be 1 cm.
What is the required minimum scan speed?
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17. Scanning the Process Example: Spot size: D / D:S = 150 cm / 150 = 1 cm
L = 300 cm
D = 150 cm
D:S = 150
Spot size:
D / D:S = 150 cm / 150 = 1 cm
1 cm
Spot distance:
L / 256 points = 300 cm / 256 points ≈ 1 cm / point
1 cm
1 cm
Line distance:
d = 1 cm / line
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18. Pixel Response Time f scanner = 150 Hz T scanner = 1 / 150 Hz = 6.6 ms
T FOV = 6.6 ms / 4 = 1.6 ms
T Pixel = 256 / 1.6 ms = 6.5 µm
times faster
A typical thermopiled pyrometer comes with 65 ms response.
How much faster is the pixel response time for the scanner?
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19. Monitoring of Sectors Math Functions: Maximum Minimum Average Sector 1
Avg
Sector 1
Sector 2
Sector 3
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20. Value Selling: 150 Hz Scan Speed
As the target moves scan lines are created adjacent to or overlapping each other
If the target moves rapidly, spaces begin to occur between scanned lines
The best way to improve coverage is to increase scan rate
This is a distinct advantage for the MP150!
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21. Value Selling: 1024 Pixel
Same spot sizes but better pixel oversampling  hot spot detection!
256 pixel
1024 pixel
Temperature profile
Pixel
Temperature reading
What are the temperature readings?
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22. Features & Benefits Feature Benefit Economic Benefit Scan speed 150 Hz
Better target coverage
Increase throughput & yield
1024 data pts / scan
Oversampling
Improved quality, reduced scrap
Built-in Ethernet
Utilize existing network
Lower installation costs
Internal 4-20 mA outputs
“PC-free” operation
Higher reliability, faster response
Internal line laser
Quicker set-up, laser fully protected by housing
IP65 Housing
Withstands harsh ambient environment
Longer life, reduced maintenance costs
Built-in air purge
Keeps window clean
Compact, “one-piece” form factor
Easy to mount
Reduced installation cost
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