Milliwave melter monitoring system
View Patent ↗A milliwave melter monitoring system is presented that has a waveguide with a portion capable of contacting a molten material in a melter for use in measuring one or more properties of the molten material in a furnace under extreme environments. A receiver is configured for use in obtaining signals from the melt/material transmitted to appropriate electronics through the waveguide. The receiver is configured for receiving signals from the waveguide when contacting the molten material for use in determining the viscosity of the molten material. Other embodiments exist in which the temperature, emissivity, viscosity and other properties of the molten material are measured.
1. A milliwave melter monitoring system, comprising:
a waveguide having a portion capable of contacting a molten material in a melter for use in measuring one or more properties of the molten material;
a passive receiver configured for use in obtaining signals transferred through the waveguide, wherein the passive receiver is configured for receiving signals from the waveguide when contacting the molten material for use in determining the viscosity of the molten material;
a reflection receiver capable of detecting a reflected probed signal that is directed through the waveguide to the melter and is reflected back for detection by the reflection receiver; and
a chopper that blocks signals transferred through the waveguide from reaching the reflection receiver while allowing signals transferred through the waveguide to reach the passive receiver, wherein the chopper is capable of being rotated so that signals transferred through the waveguide do not reach the passive receiver while being allowed to reach the reflection receiver such that the reflected probed signal moves past the chopper towards the melter and then is reflected to move back past the chopper to the reflection receiver.
2. The milliwave melter monitoring system as set forth in claim 1 , wherein the reflection receiver is capable of detecting a coherent reflection of flow for use in determining the viscosity of the molten material, and wherein the reflection receiver is capable of detecting a coherent reflection of displacement for use in determining the specific gravity of the molten material.
3. The milliwave melter monitoring system as set forth in claim 1 , wherein the reflection receiver is capable of detecting a reflection off of a noble metal layer when a portion of the waveguide contacts the molten material for use in determining noble metal accumulation in the melter.
4. The milliwave melter monitoring system as set forth in claim 1 , wherein the portion of the waveguide that contacts the molten material is made of a refractory material.
5. The milliwave melter monitoring system as set forth in claim 1 , wherein a portion of the waveguide is capable of being immersed into the molten material in order to induce a flow and displacement into the molten material that are capable of being detected by the reflection receiver for use in determining the viscosity of the molten material and the density of the molten material.
6. The milliwave melter monitoring system as set forth in claim 1 , wherein the waveguide is capable of being located in the melter such that the waveguide does not contact the molten material, wherein signals are capable of being transferred through the waveguide for use in determining the temperature, emissivity and surface displacement in the melter.
7. The milliwave melter monitoring system as set forth in claim 6 , wherein the signals transferred through the waveguide are used for determining a melter foaming event, salt layer formation, melter pour rate, and liquidus in the melter.
8. The milliwave melter monitoring system as set forth in claim 1 , wherein the passive receiver is capable of detecting a thermal emission emitted from the melter and transferred through the waveguide to the passive receiver.
9. The milliwave melter monitoring system as set forth in claim 8 , wherein the reflected probed signal that is directed through the waveguide to the melter is a redirected fraction of the thermal emission from the melter.
10. The milliwave melter monitoring system as set forth in claim 8 , wherein the waveguide has a crossed waveguide that has a side mirror and a signal dump.
11. A milliwave melter monitoring system, comprising:
a waveguide configured for use in transferring signals;
a passive receiver capable of obtaining a signal from the waveguide that is a thermal emission;
a reflection receiver capable of obtaining a signal from the waveguide that is a reflected probed signal that is directed through the waveguide to a monitored surface and is reflected back for detection by the reflection receiver;
wherein the passive receiver and the reflection receiver are used in order to determine temperature and emissivity; and
a chopper that blocks signals transferred through the waveguide from reaching the reflection receiver while allowing signals transferred through the waveguide to reach the passive receiver, wherein the chopper is capable of being rotated so that signals transferred through the waveguide do not reach the passive receiver while being allowed to reach the reflection receiver such that the reflected probed signal moves past the chopper towards the monitored surface and then is reflected to move back past the chopper to the reflection receiver.
12. The milliwave melter monitoring system as set forth in claim 11 , wherein the reflected probed signal is a redirected fraction of the thermal emission from a melter that is directed through the waveguide to the melter and reflected back from the melter for detection by the reflection receiver.
13. The milliwave melter monitoring system as set forth in claim 11 , wherein the waveguide is capable of being located in a melter such that the waveguide does not contact molten material present within the melter, wherein signals are capable of being transferred through the waveguide for use in determining the temperature, emissivity and surface displacement in the melter such that resulting properties in the melter including a melter foaming event, salt layer formation, melter pour rate, and liquidus in the melter are capable of being determined.
14. The milliwave melter monitoring system as set forth in claim 11 , wherein the temperature and emissivity are measured simultaneously through the use of signals obtained by the passive receiver and the reflection receiver.
15. The milliwave melter monitoring system as set forth in claim 11 , wherein a portion of the waveguide is capable of contacting a molten material in a melter for use in obtaining measurements beneath the surface of the molten material, wherein the reflection receiver is capable of detecting a coherent reflection of flow for use in determining the viscosity of the molten material, and wherein the reflection receiver is capable of detecting a coherent reflection of displacement for use in determining the specific gravity of the molten material.
16. The milliwave melter monitoring system as set forth in claim 15 , wherein a portion of the waveguide is capable of being moved relative to the melter so that the portion of the waveguide can be immersed within the molten material.
17. A milliwave melter monitoring system, comprising:
a waveguide configured for the transfer of signals from a melter for use in determining properties in the melter;
a passive receiver configured for receiving signals from the waveguide;
a reflection receiver configured for receiving signals from the waveguide, wherein one of the signals is a reflected probed signal that is directed through the waveguide to the melter and is reflected back for detection by the reflection receiver;
a computer configured for receiving signals from the passive receiver and the reflection receiver for use in determining temperature, emissivity, viscosity, density and a foaming event in the melter; and
a chopper that blocks signals transferred through the waveguide from reaching the reflection receiver while allowing signals transferred through the waveguide to reach the passive receiver, wherein the chopper is capable of being rotated so that signals transferred through the waveguide do not reach the passive receiver while being allowed to reach the reflection receiver such that the reflected probed signal moves past the chopper towards the melter and then is reflected to move back past the chopper to the reflection receiver.
18. The milliwave melter monitoring system as set forth in claim 17 , wherein a portion of the waveguide is capable of being immersed into a molten material present in a melter in order to induce a flow and displacement into the molten material that are capable of being detected by the reflection receiver for use in determining the viscosity of the molten material and the density of the molten material.
19. The milliwave melter monitoring system as set forth in claim 17 , wherein the passive receiver receives a signal from the waveguide that is a thermal emission emitted from the melter, and wherein the reflection receiver detects the reflected probed signal that is a redirected fraction of the thermal emission from the melter that is directed through the waveguide to the melter and is reflected back for detection by the reflection receiver.
20. The milliwave melter monitoring system as set forth in claim 17 , wherein the computer is configured for receiving signals that are used to determine plenum gas temperature in the melter, a temperature profile in the melter, and milliwave melter monitoring imaging in the melter.