Sensors & Transducers


Contour detection for inline quality checks

March 2020 Sensors & Transducers

In assembly and handling applications, the PMD profiler from ifm electronic does not only verify the presence of an object, but it checks whether the correct component has been used and properly installed. A push of a button is all that is required to compare the contour of an object with the taught target contour stored in the unit’s memory. The photo-electronic line scanner reliably detects tiny differences between nearly identical components. Since distance is not relevant, the profiler does not require complicated positioning as is the case with 1D sensors. Thanks to the insensitivity to extraneous light, no screening or external illumination is required as is the case with camera systems performing to this high level of accuracy. With its user-friendly colour display and intuitive setting using only 3 pushbuttons, the sensor is ready for use within a few minutes without requiring any software. It is possible to either transmit information on the reject rate or the detected object profiles via IO-Link.

Region of Interest: high degree of accuracy

To make the determination of differences between nearly identical components even more reliable, the profile evaluation can be narrowed down to the relevant object area with two markings by using the Region of Interest function. The function can be used in the fixed mode to verify whether the object is accurately positioned. In the floating mode, the contour comparison is variable along the laser line. It is not necessary to position the parts to be tested in exactly the same way.

Quality assurance: definition of tolerances

The similarity between the reference and the target object is provided as a value between 0 and 100%. The threshold function can be used to define the value from which the reference object is no longer acceptable. Hence, a low tolerance value will guarantee the quality of assemblies that require great accuracy. Optional contour visualisation via software simplifies the failure analysis.


Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Distance sensor for confined spaces
ifm - South Africa Sensors & Transducers
The O6D100 from ifm has been designed as a powerful all-rounder for typical applications in object detection, distance measurement and positioning.

Read more...
Integrated and upgradable vision system
ifm - South Africa Motion Control & Drives
The O3R platform is the comprehensive solution for centralised, synchronised processing of image and sensor information in autonomous mobile robots such as automated guided vehicles.

Read more...
Long-range laser distance measuring sensor
Vepac Electronics Sensors & Transducers
The MS-100A is a long-range laser distance measuring sensor with a range of 150 to 1000 mm. This sensor excels in applications requiring extended measurement capabilities, such as quality control and logistics.

Read more...
Listening for damage to wind turbines
Sensors & Transducers
The Fraunhofer Institute for Integrated Circuits, working in concert with the Fraunhofer Institute for Wind Energy Systems, has developed a solution that can be used to identify cracks and breakage inside wind turbine blades remotely at an early stage.

Read more...
Robust sensors for pneumatic applications
ifm - South Africa Pneumatics & Hydraulics
The pressure sensors from ifm have a G1/8 process connection, combined with a welded thin-film measuring cell. While offering an unbeatable price/performance ratio, this technology provides for high measuring accuracy in a very compact and robust housing.

Read more...
Robust PLC for field applications
ifm - South Africa PLCs, DCSs & Controllers
ifm is a leading suppliers of robust control systems for mobile use. Its ecomat series comprises PLCs, I/O modules and sensors that can withstand the harsh environmental influences of mobile applications.

Read more...
Verification using Heartbeat Technology is a breeze
Endress+Hauser South Africa Sensors & Transducers
Heartbeat Technology reflects Endress+Hauser’s long-term commitment to enhancing measurement reliability and efficiency across a growing product portfolio.

Read more...
Ultrasonic flow meters
ifm - South Africa Flow Measurement & Control
The ultrasonic flow meter of the SU series from ifm - South Africa monitors liquid media such as water, glycol solutions or industrial oils. It detects the three process categories volumetric flow quantity, consumed quantity and medium temperature.

Read more...
Enhancing efficiency and reliability in the energy sector
VEGA Controls SA Sensors & Transducers
VEGA offers practical, reliable solutions through specialised measuring instruments and deep industry know-how, all tailored to help energy companies keep costs under control while meeting strict regulatory standards.

Read more...
Remote monitoring solution for sewage plants
ifm - South Africa Analytical Instrumentation & Environmental Monitoring
With ifm’s remote monitoring solution, you can visualise the condition of the submersible pumps in your sewage plant and diagnose issues before they become serious problems.

Read more...









While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.




© Technews Publishing (Pty) Ltd | All Rights Reserved