ROBOTICS
onto the robot that applies the adhesive beading. Here, the sensor moves along the adhesive bead to create a 3D image. It reveals whether the adhesive quantity is sufficient, whether it is applied evenly and whether the bead is applied in the correct places. All detected measurement values are stored separately. If an error occurs in the process at a later point in time, these measurement values can be used for analysis purposes.
STRENGTHS OF THE OPTICAL SENSORS The strengths of the scanCONTROL laser scanners and optoNCDT laser triangulation sensors lie in their compact design, which means they can be easily integrated into robot- based applications, even where space is limited. Due to robust cabling, the sensors are suitable for the extreme rotational and torsional movements on the robot arm. They also have an integrated, highly sensitive receiver matrix, which enables measurements on almost all industrial materials, largely independent of surface reflection. Real-time quality control enables immediate intervention in production control. There is a choice of
UKManufacturing Autumn 2024
sensors with a red laser diode or with the patented Blue Laser Technology, which is generally used when the red laser light reaches its limits. This is the case, for example, with organic materials, wood, semi-transparent materials or red-hot glowing metals. The blue laser light can be focused more sharply on certain surfaces and enables high precision measurements there too. For applications where harsh environmental conditions prevail, Micro-Epsilon offers special accessories that protect the sensors. For welding applications, for example, a special housing is available with interchangeable protective screens. A special compressed-air purge system protects the optical components from dust.
MEASURING PRINCIPLE OF LASER SCANNERS
The laser profile scanner uses the triangulation principle for two-dimensional profile acquisition. It emits a laser beam that is expanded into a laser line. This hits the measuring object. The laser light is reflected by the object surface and projected onto a highly-sensitive receiving matrix in the sensor.
In addition to distance information (z-axis), the controller also uses this camera image to calculate the position along the laser line (x-axis). These measured values are then output in a two-dimensional coordinate system that is fixed with respect to the sensor. In the case of moving objects or a traversing sensor, it is therefore possible to obtain 3D measurement values.
MEASURING PRINCIPLE OF LASER TRIANGULATION SENSORS The laser triangulation principle is based on a simple geometric relationship. A laser diode transmits the laser beam onto the measuring object. A lens focuses the reflected rays onto a CCD/CMOS array. The distance to the target object is determined via a triangular relationship between the laser diode, the measurement point on the object and the image on the CCD line. The measurement resolution reaches a fraction of a micrometer.
Micro-Epsilon
www.micro-epsilon.co.uk
47
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68
