If you place two parallel wires in the trough surrounding the screw, parallel to the flight of the screw, such that you have a constant "volume" of chips over the sensor wires, then measure the conductivity you will have a rough idea of moisture content... (This will work better if the screw has a pitch better than 45 degrees, such that the area you pick will always be under wood and not the screw.)
If you can electrically isolate two sections of screw, driven from opposite ends, you might also be able to measure the conductivity of the sample "between screws".. Or.. if you can meter a constant volume of material onto a "moving scale" you might be able to tell by weight... within a given species of wood. Steve [In a message on Fri, 10 Aug 2007 08:47:23 +0200, "Thomas Berg" wrote:] >Hi, > >I´ve looked at thoose devices and as i see it the problem is the the >woodchips are moving in the screw and would I get an acurate reading >with the soilsenor and how long would it last in that enviroment? > >/Thomas > >Mark Cheeseman skrev: >> Thomas Berg wrote: >> >>> I have a need to measure moisture or wetness in woodchips as they are in >>> a transportationscrew, do any one of you have any good ideas how to do >>> this with 1-wire? >>> >> >> Hi Thomas, >> >> Hobby Boards have some moisture sensors and 1-wire interfaces. They are >> intended for measuring soil moisture but might be adaptable for your >> needs. I haven't tried them myself - just one of the "interesting >> devices" I want to play with when I get the time. >> >> Cheers, >> Mark >> >> ------------------------------------------------------------------------- >> This SF.net email is sponsored by: Splunk Inc. >> Still grepping through log files to find problems? Stop. >> Now Search log events and configuration files using AJAX and a browser. >> Download your FREE copy of Splunk now >> http://get.splunk.com/ >> _______________________________________________ >> Owfs-developers mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/owfs-developers >> > > >------------------------------------------------------------------------- >This SF.net email is sponsored by: Splunk Inc. >Still grepping through log files to find problems? Stop. >Now Search log events and configuration files using AJAX and a browser. >Download your FREE copy of Splunk now >> http://get.splunk.com/ >_______________________________________________ >Owfs-developers mailing list >[email protected] >https://lists.sourceforge.net/lists/listinfo/owfs-developers > Steve ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
