Principles, Practice and Problems

1969 ◽  
Vol 2 (10) ◽  
pp. T170-T172
Author(s):  
R. J. McGill
Keyword(s):  
Moisture Content ◽  
Measuring Equipment ◽  
Control Points ◽  
Control Methods ◽  
Absolute Value ◽  
Accurate Knowledge ◽  
Profile Control ◽  
Improve Measurement ◽  
And Control ◽  
Measurement And Control

Moisture content is one of the most important papermaking variables. Close control in the process is essential. Accurate knowledge of its absolute value, separated from that of solids, is highly desirable, for process and profit optimisation. A wide variety of measuring equipment and control methods is in use and several installations are described. Outstanding problems include the need to improve measurement reproducibility and independence from the effects of other variables, simplification of calibration and control, wet end measurement and cross-direction profile control. The ultimate aim should be an overall system for moisture and substance, incorporating distribution of measurement and control points throughout the process.

Automatic Moisture Sensor for Measurement and Control of Cotton Ginning Processes

1983 ◽  
Vol 105 (1) ◽  
pp. 27-30 ◽  
Author(s):  
A. H. Waldie ◽  
S. E. Hughs ◽  
M. N. Gillum
Keyword(s):  
Dielectric Constant ◽  
Process Control ◽  
Moisture Content ◽  
Cotton Fiber ◽  
Sufficient Accuracy ◽  
Moisture Sensor ◽  
Percent Moisture ◽  
And Control ◽  
Measurement And Control ◽  
Conventional Oven

Cotton fiber moisture content is one of the most important factors that affects the operation of the cotton ginning process. A system has been developed that measures cotton’s dielectric constant and density with sufficient accuracy to indicate moisture content of the fiber during processing. An electronic capacitor and a pneumatic density sensor supply measurements to a microprocessor which combines them into a predicted moisture content. Tests showed that these predicted readings are more precise than conventional oven-moisture determinations and that they can be used for process control in the ranges from 6.5- to 12-percent moisture content.

Measurement and Control of Moisture in Wheat

1970 ◽  
Vol 3 (11) ◽  
pp. T181-T187 ◽  
Author(s):  
M. Brain
Keyword(s):  
Control System ◽  
Moisture Content ◽  
Automatic Control ◽  
Automatic Control System ◽  
Microwave Technique ◽  
Line Measurement ◽  
On Line ◽  
And Control ◽  
Measurement And Control ◽  
Consequent Improvement

A microwave technique for the continuous on-line measurement of moisture content in wheat is described together with an automatic control system based on these measurements. The results from a prototype installation are given and the consequent improvement of flour parameters are discussed.

scholarly journals INDIRECT MEASUREMENT AND CONTROL OF MOISTURE CONTENT DURING DEHYDRATION PERFORMED BY FRYING

1999 ◽  
Vol 17 (7-8) ◽  
pp. 1627-1637 ◽  
Author(s):  
G. Trystram ◽  
I.C. Tréléa ◽  
A.L. Raoult-Wack ◽  
A. Diaz ◽  
F. Courtois
Keyword(s):  
Moisture Content ◽  
Indirect Measurement ◽  
And Control ◽  
Measurement And Control

scholarly journals An arid house for a xerophilic bug Nysius huttoni

2016 ◽  
Vol 69 ◽  
pp. 321-321
Author(s):  
T.E.S. Sullivan
Keyword(s):  
Environmental Control ◽  
Fungal Growth ◽  
Sensor Data ◽  
Control Methods ◽  
Insect Rearing ◽  
Memory Card ◽  
And Control ◽  
Measurement And Control ◽  
Small Insect ◽  
The Ideal

With sensors and microprocessors becoming more affordable all the time it is now possible to build inexpensive environmental regulators for small insect colony boxes We designed and built a humidity regulator for xerophilic (dryloving) Nysius bugs Poorly ventilated insect rearing boxes can have an overly elevated humidity that can promote unwanted fungal growth especially if there is live plant material involved Air conditioned laboratories can have very low ambient humidity but the ideal humidity for an insect colony may be intermediate Direct and accurate measurement and control of humidity is now possible electronically using sensors and a fan to pump dry air into a humid space in a controlled fashion to regulate the humidity The potential exits for different sensors to be used to monitor different environmental variables and to trigger equipment to respond when an environmental threshold is reached Environmental control methods can be simple or elaborate depending on the colony requirements and budget A clock and memory card can be added to the microprocessor to record sensor data and event triggers This method has been successfully used to rear the wheat bug Nysius huttoni

scholarly journals A Periodic-Automatic Apparatus for the Determination of the Moisture Content of Tobacco / Eine periodisch-automatische Feuchtigkeitsmesseinrichtung für Tabak

1966 ◽  
Vol 3 (7) ◽  
Author(s):  
M. von Bethmann ◽  
W. Dettmer
Keyword(s):  
Moisture Content ◽  
Constant Pressure ◽  
Electric Resistance ◽  
Automatic Apparatus ◽  
Measuring Process ◽  
Measuring Point ◽  
Routine Measurement ◽  
And Control ◽  
Measurement And Control

AbstractHaving reviewed general conditions and various difficulties of routine measurement and control of tobacco humidity, the authors present a new periodic-automatical principle which they developed for the determination of the moisture content of tobacco. Tobacco specimens continuously taken from the conveyor by an automatic sampler are tested by the principle of conductibility with constant pressure and time values. A velocity of 5 to 9 measurements per minute can easily be achieved. The measuring process is controlled by electronic programming. The results are recorded as deviation from a desired value by a registering instrument giving preferably also an account of the time of sampling. The said value to be fixed at choice represents a given electric resistance which is adjusted to the desired humidity value, to the temperature at the measuring point and to the specific properties of the respective tobacco mixture. Supplementary appliances for the automatic indication of ranges, the direct registering of figures and the storage of results can be incorporated with the apparatus presented. It is also possible to take parallel measurements of temperature and to compensate for its influence on the measuring results.

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