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Sensors for the Detection of Transparent Objects Sensors for the detection of transparent objects Solutions for a world of clear materials Living in a clear material world 2 SENSORS FOR THE DETECTION OF TRANSPARENT OBJECTS | SICK 8015319/2012-07-10 Subject to change without notice Reliably detect transparent objects The world of transparent material. Detection with perspective. Automation with vision . 4 - 5 A variety of applications, different solutions Ultrasonic vs. capacitive vs. optical solutions . 6 - 7 Reliable detection of transparent objects - Retro-reflective photoelectric sensors of SICK . 8 - 9 CTA , continuous threshold adaptation . 10 - 11 Retro-reflective photoelectric sensors - reliable under all application conditions . 12 - 13 Many paths, one goal: The right selection of sensors . 14 - 15 Reflectors for industrial sensors . 16 - 17 Technical data . 18 - 31 8015319/2012-07-10 SENSORS FOR THE DETECTION OF TRANSPARENT OBJECTS | SICK 3 Subject to change without notice The world of transparent materials. Detection with perspective. Automation with vision Clear plastic packaging, bottles made of glass or PET, vials and dropper, flat, tube and hollow glass, plastic wrap for securing loads on pallets – automation specialists have to find their way in the world of transparent materials in many manufacturing processes. Pharma & Cosmetics The task: • Reliable detection, positioning of small transparent vials and flasks The challenge: • Precise, responsive and repeatable • Hygienic design required • Sometimes small space requirements The solution: • WL4G in hygienic design • WLL180 Food industry The task: • Count, detect and position packaged foods The challenge: • Reliable detection of different packaging shapes and surfaces • Sometimes very small Dairies object sizes The task: • Precision positioning of • Reliable detection, positioning and monitoring products of e.g., bottles or beakers The solution: The challenge: • WL12G-3 • Agressive cleaning processes • Wetness, humidity • Aggressive chemical environments The solution: • WL12G-3 • WL4G-3 Inox 4 SENSORS FOR THE DETECTION OF TRANSPARENT OBJECTS | SICK 8015319/2012-07-10 Subject to change without notice Packaging technology The task: • Reliably detect, position and count containers with transparent wrap • Monitor the presence of products The challenge: • Reliable response to fast production processes • Containers vary greatly in shape and surface • Transparency of plastic wrap varies greatly Beverage industry The solution: The task: • WL27 MultiPac • Detect, count, select bottles of • WL12G-3P:S12 all kinds The challenge: • Harsh application conditions • Aggressive cleaning processes • Simple commissioning required The solution: • WL12G-3 • WL4G-3 8015319/2012-07-10 SENSORS FOR THE DETECTION OF TRANSPARENT OBJECTS | SICK 5 Subject to change without notice A variety of applications, different solutions. Ultrasonic vs. capacitive vs. optical solutions Sensor solution Ultrasonic Capacitive Fiber-optic sensors and fibers Photoelectric proximity sensors Retro-reflective photoelectric sensors Strengths Reliable detection results regardless of Reliable detection results regardless of surface Ideal for very limited available space High precision, suitable for „precise High precision, suitable for surface gloss or object contour gloss or object contour positioning“ tasks „precise positioning“ tasks Reliable detection results regardless of Reliable detection results regardless of dirt or Ideal for applications with Ex Reliably detects very small objects Reliably detects very small objects dirt or high-pressure cleaning high-pressure cleaning protection specification and narrow gaps and narrow gaps Ideal for applications with Quick response times: High-speed Quick response times: High-speed TU > 70° C product runs are reliably detected product runs are reliably detected Ideal for applications in dynamic Easy to position, highly visible Easy to position, highly visible environments (robots) light spot light spot Large range of product types for fibers Large range of product types Large range of product types Evaluation electronics physically Cost-effective WT solutions available Cost-effective WL solutions available for isolated from detection zone for basic applications basic applications No interference by EMC Detection results regardless of surface gloss or object contour Quick response times: High-speed Universal use and application product runs are reliably detected possibilities Additional functionality: Continuous Switching distance up to 5000 mm threshold Apaptation of switching possible threshold to increase sensor reliability WLL in one-way operation range Additional functions, such as automatic up to 20 m possible, simple continuous threshold adaptation for optimal commissioning adjustment to the application conditions Sensing range limited in proximity Switching distance limited to 150 mm Switching distance limited to 20 mm Switching distance limited to 1000 mm Reflector necessary Considerations mode Detection result highly dependent on Complex alignment, no visible reference Detection result highly dependent on Detection quality highly dependent on Complex alignment, no visible reference point fiber selection, amplifier is point surface gloss or object contour the reflector selection susceptible to mechanical damage Solution very application-specific, Detection result highly dependent on Narrow gaps are not detected reliably Narrow gaps are not detected reliably often difficult to use universally dirt or high-pressure cleaning WT solution very application-specific, Precision sufficient for presence monitoring Precision sufficient for presence monitoring Price often difficult to use universally Applications with higher requirements cannot Applications with higher requirements cannot Kapazitiv be solved be solved Slow response times, unsuitable for the Slow response times, unsuitable for the detection detection of fast moving targets. of fast moving targets Beam dependent on installation position Susceptible to cross talk from neighboring (very sensitive to angular alignment) targets Detection quality is marginal for flat targets Susceptible to cross talk 6 SENSORS FOR THE DETECTION OF TRANSPARENT OBJECTS | SICK 8015319/2012-07-10 Subject to change without notice Sensor solution Ultrasonic Capacitive Fiber-optic sensors and fibers Photoelectric proximity sensors Retro-reflective photoelectric sensors Strengths Reliable detection results regardless of Reliable detection results regardless of surface Ideal for very limited available space High precision, suitable for „precise High precision, suitable for surface gloss or object contour gloss or object contour positioning“ tasks „precise positioning“ tasks Reliable detection results regardless of Reliable detection results regardless of dirt or Ideal for applications with Ex Reliably detects very small objects Reliably detects very small objects dirt or high-pressure cleaning high-pressure cleaning protection specification and narrow gaps and narrow gaps Ideal for applications with Quick response times: High-speed Quick response times: High-speed TU > 70° C product runs are reliably detected product runs are reliably detected Ideal for applications in dynamic Easy to position, highly visible Easy to position, highly visible environments (robots) light spot light spot Large range of product types for fibers Large range of product types Large range of product types Evaluation electronics physically Cost-effective WT solutions available Cost-effective WL solutions available for isolated from detection zone for basic applications basic applications No interference by EMC Detection results regardless of surface gloss or object contour Quick response times: High-speed Universal use and application product runs are reliably detected possibilities Additional functionality: Continuous Switching distance up to 5000 mm threshold Apaptation of switching possible threshold to increase sensor reliability WLL in one-way operation range Additional functions, such as automatic up to 20 m possible, simple continuous threshold adaptation for optimal commissioning adjustment to the application conditions Sensing range limited in proximity Switching distance limited to 150 mm Switching distance limited to 20 mm Switching distance limited to 1000 mm Reflector necessary Considerations mode Detection result highly dependent on Complex alignment, no visible reference Detection result highly dependent on Detection quality highly dependent on Complex alignment, no visible reference point fiber selection, amplifier is point surface gloss or object contour the reflector selection susceptible to mechanical damage Solution very application-specific, Detection result highly dependent on Narrow gaps are not detected reliably Narrow gaps are not detected reliably often difficult to use universally dirt or high-pressure cleaning Conclusion: WT solution very application-specific, Precision sufficient for presence monitoring Precision sufficient for presence monitoring Price Photoelectric retro-reflective often difficult to use universally sensors provide maximum Applications with higher requirements cannot Applications with higher requirements cannot system benefits: Kapazitiv be solved be solved • Maximum application versatility • Maximum object detection Slow response times, unsuitable for the Slow response times, unsuitable for the detection • Maximum precision and detection of fast moving targets. of fast moving targets response rate Beam dependent on installation position Susceptible to cross
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