Feature sponsored by
Test & measurement
CCD sensor line. This is how the complete visible spectrum can be accurately measured with a spectral resolution of 5nm. The colour measurement system not only compares the colours to reference values, but also identifies and outputs these as coordinates in the colour space. As well as the sensor system, the white light LED is incorporated into the housing of the system, enabling different sensor heads to be connected via optical-fibre cables. In the ACS1 standard sensor for conventional measurement tasks, illumination and receiver are either arranged at an angle of 30°x: 0° or 45°x: 0°. This leads to observation distances of 50mm or 38mm respectively. For more complex measurement tasks, for
example, with structured, highly reflective or shiny metallic surfaces, the ACS2 circular sensor with 24 circular arranged lighting optics at a measuring angle of 45°c:0° is used. This ensures continuous, homogeneous lighting for measurements, regardless of the angular position of the target object. Even with smaller measurement objects or on curved surfaces, reliable colour measurements are possible. For colour measurements of transparent objects such as film
or glass, the ACS3 transmission sensor is required where illumination and receiver are arranged at an angle of 180°:0° to each other. This receiver sensor also measures colours of self-luminous objects. No lighting unit is required.
EasE of usE
Although ‘colour measurement’ is a complex issue, colour sensors and colour measurement systems from Micro-Epsilon are easy to use. Colour teaching is carried out using a teach-in button; LEDs on the colour sensor or the measurement system signify the mode of operation. In most cases, configuration is performed via an integrated web server. Settings such as illumination and measurement frequency for perfect colour recognition and measurements can be set up easily. The output signals are also set up directly using the web interface. In order to ensure high quality standards,
measurement of colour is an invaluable technique in numerous industrial applications. A typical example is the automotive industry: most bumpers, door handles and exterior mirrors are painted the same colour as the car chassis. Furthermore, distance sensors and headlight cleaning systems are integrated in the bumpers. These components are painted separately but must precisely match the colour
of the body. During the assembly process, the measurement system verifies if these colours are identical because the human eye recognises even the smallest of deviations. Also, in the passenger compartment, the colours must be correct. Here, structured, curved and reflecting surfaces are additional challenges for colour measurement technology. Another example is in the production of facade panels made from zinc whose surface colour can change after being coated. During production, the colour must be inspected continuously in order to ensure early recognition of any deviations. Otherwise, facade panels with slightly deviating colours would stand out, particularly in large facade areas. In tablet production, the slightest colour deviations must be detected. In transparent blister packs, different colour shades would give a poor impression. For the above examples and in many other
applications, Micro-Epsilon offers the optimum solution in terms of perceptive colour sensors and colour measurement systems. Depending on the requirements, the user can also solve difficult colour measurement tasks. The products for colour recognition and measurement enable very small Delta-E values, high measurement frequencies and inline (in-process) measurements. The user benefits from a measurement system that easily integrates into their industrial control systems and simple configuration and handling via the integrated web server.
Micro-Epsilon
www.micro-epsilon.co.uk
Instrumentation Monthly August 2022
29
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 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102
