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BackgroundLength and speed are two essential measurement parameters in textile industries worldwide. For optimal quality at process control, these parameters have to be determined accurately. Such accuracy avoids wastage and hence, minimizes production costs. Conventional solutions, like measurement wheels combined with incremental encoders always involve slippage in measurement. This is undesirable as it can lead to significant measurement errors. The contact measuring principle often also leaves unwanted residue and marks on the textile’s surfaces and therefore granting it unsuitable for use over sensitive surfaces. Moreover, conventional systems need to be constantly monitored, thereby these solutions are always connected with increased installation and maintenance costs.
Optical AlternativeCOVIDIS and OPTIPACT sensors from company INTACTON offer the possibility for a dynamic, non-contact and slip-free velocity and length measurement, in up to two dimensions. In addition to the compact design, the graphical user interface provides simple and straight forward system integration. The sensors can also be placed in locations that have space constraints and are difficult to reach. Due to the long life visible LED illumination no additional protective measures, like laser class protections, have to be considered, hence reducing the service and maintenance costs.
These non-contact sensors are specially designed for measuring applications in the textile industry and cover a broad range of applications. For example: - In textile and cotton shrinking processes, precise velocity measurements, without errors caused by slippage, are required. The sensors provide the exact determination of inlet and outlet velocity of the textile and therefore obtain consistent quality.
- In textile coating and dyeing machinery, INTACTON’s optical motion sensors which are designed for non-contact, optical, speed and length measurement in 2 dimensions, are ideal for handling the many dimensional changes of the textile when multiple coatings run over each other.
- In textile cutting and printing, our optical alternative can provide the consistent and accurate measurement feedback necessary to define a steady process control. Hence, reducing material wastage and ultimately production costs.
- In spinning mills and power looms, INTACTON’s non-contact optical measurement sensors provide the accurate measurements required, without causing any textile deformation or high material wastage.
Technology - OPTIPACTThe measuring principle of the OPTIPACT is based on a simple correlation method whereby the surface is observed by a camera suitably illuminated by appropriate light sources. Displacement, direction and velocity are analyzed and calculated by comparing consecutive high resolution surface pictures. This technology also enables a two dimensional measurement in OPTIPACT sensors. - Non-contact measuring principle
- Velocity range up to 4 m/s
- Good precision, error <1%
- Measuring of 2D movements
Technology - COVIDISThe COVIDIS sensor system has a high speed line camera that detects light reflected from the object being measured. The basic measurement principle is based on spatial frequency filtering technology. Using a time-related integration of the velocity signal, the distance covered can be measured with an accuracy of 0.05%.- Non-contact measuring principle
- Velocity range up to 50 m/s
- Measuring uncertainty <0.05%
- Standstill detection
For the detailed application note of COVIDIS and OPTIPACT in Textile Industries: |
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