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Hi list members,
I have an application where the characteristics of a product formed by an extrusion process are required to be automatically controlled. The
most desirable way to determine the product characteristics appears to be by measuring the amount of light transmitted through the product.
The product material (about 1cm thick) itself is more or less opaque, however there are voids where light will shine right through, similar to
a woven material.
I am investigating the use of a stabilised light source and photodetector operating in similar way to a standard turbidity meter. A camera may be preferable to a small photodetector as the
measurement may need to be over an area of say 50mm diameter to allow for some averaging. The system will need to provide an output signal such as 0 - 10V or 4-20mA to be used for controlling the extrusion process speed.
If anyone has any ideas about how to set up such a system or know of suppliers of suitable equipment and would care to post them to the list
or to myself, it would be much appreciated.
Regards
David Berry
Cozmac Automation Ltd
[email protected]
I have an application where the characteristics of a product formed by an extrusion process are required to be automatically controlled. The
most desirable way to determine the product characteristics appears to be by measuring the amount of light transmitted through the product.
The product material (about 1cm thick) itself is more or less opaque, however there are voids where light will shine right through, similar to
a woven material.
I am investigating the use of a stabilised light source and photodetector operating in similar way to a standard turbidity meter. A camera may be preferable to a small photodetector as the
measurement may need to be over an area of say 50mm diameter to allow for some averaging. The system will need to provide an output signal such as 0 - 10V or 4-20mA to be used for controlling the extrusion process speed.
If anyone has any ideas about how to set up such a system or know of suppliers of suitable equipment and would care to post them to the list
or to myself, it would be much appreciated.
Regards
David Berry
Cozmac Automation Ltd
[email protected]