Measuring and testing – Volume or rate of flow – By measuring electrical or magnetic properties
Patent
1991-04-10
1992-12-15
Wood, Donald O.
Measuring and testing
Volume or rate of flow
By measuring electrical or magnetic properties
324687, 324688, 361785, G01F 156
Patent
active
051706709
ABSTRACT:
A three-axis velocity probe system for determining three-axis positional velocities of small particles in fluidized bed systems and similar applications. This system has a sensor head containing four closely-spaced sensing electrodes of small wires that have flat ends to establish a two axis plane, e.g. a X-Y plane. Two of the sensing electrodes are positioned along one of the axes and the other two are along the second axis. These four sensing electrodes are surrounded by a guard electrode, and the outer surface is a ground electrode and support member for the sensing head. The electrodes are excited by, for example, sinusoidal voltage having a peak-to-peak voltage of up to 500 volts at a frequency of 2 MHz. Capacitive currents flowing between the four sensing electrodes and the ground electrode are influenced by the presence and position of a particle passing the sensing head. Any changes in these currents due to the particle are amplified and synchronously detected to produce positional signal values that are converted to digital form. Using these digital forms and two values of time permit generation of values of the three components of the particle vector and thus the total velocity vector.
REFERENCES:
patent: 4695789 (1987-09-01), Lambertz et al.
"Radio-frequency probe for bubble size and velocity measurements ", Abuaf et al. Rev. Sci. Inst. vol. 50, No. 10, Oct. 1979, pp. 1259-1264.
"Particle Fraction and Velocity Measurement in Gas-Powder Streams by Capacitance Transducers", International Journal of multiphase Flow, Irons and Chang, 9(3), 289-297 (1983).
"Investigation of particle Velocities in a Gas-Solid System", American Institute of Chemical Engineers, Smith and Klinzing, 32(2), 313-316 (1986).
"Local Particle Velocity Measurements with a Laser Anemometer in an Upward Flowing Gas-Solid Suspension", Powder Technology, Birchenough and Mason, 14(1), 139-152 (1976).
"An Impact Probe for Local Analysis of Gas-Solid Flows", Powder Technology, Raso, Tirabasso and Consi, 34(2) 151-159 (1983).
Fasching George E.
Smith, Jr. Nelson S.
Utt Carroll E.
Breeden David E.
Hamel Stephen D.
Moser William R.
The United States of America as represented by the United States
Wood Donald O.
LandOfFree
Three axis velocity probe system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Three axis velocity probe system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three axis velocity probe system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2085653