Method and apparatus for flexible temperature sensor having coiled element
One example of the present subject matter includes a first elongate section having a first flexible conductor enveloped by a first jacket; a second elongate section having a second flexible conductor enveloped by a second jacket; and an sensor section having an elongate flexible tubular shape, the sensor section housing a resistance temperature detector element which is at least partially coiled and which is resistance welded to the first flexible conductor at a first weld and to the second flexible conductor at a second weld; wherein the sensor section at least partially envelops and overlaps the first elongate section and the second elongate section, with a first band crimping the sensor section to the first elongate section, and a second band crimping the sensor section to the second elongate section, and with the first and second welds disposed between the first and second bands.
1. A sensor, comprising:
an elongate flexible tube;
a wire extending though the tube from a proximal end to a distal end, the wire including a coiled portion within the tube, and the wire returning from the distal end to the proximal end exterior to the tube;
a first tape-covered band connecting the wire to the proximal end of the tube;
a second tape-covered band connecting the wire to the distal end of the tube;
a third tape-covered band connecting the wire to itself at a portion of the wire exterior to the distal end of the tube, the third band forming a loop in the wire at an end of the third band opposite the tube; and
a fourth tape-covered band connecting the wire to itself at a portion of the wire exterior to the proximal end of the tube;
wherein the wire originates and terminates near the proximal end of the tube, enabling the sensor to be used with communication electronics disposed at the proximal end of the tube.
2. The sensor of claim 1 , wherein the first tape-covered band includes Kapton tape.
3. The sensor of claim 1 , wherein the first tape-covered band includes brass.
4. The sensor of claim 1 , wherein the first tape-covered band includes steel.
5. The sensor of claim 1 , wherein the first tape-covered band includes nickel.
6. The sensor of claim 1 , wherein the first tape-covered band includes nickel-plated brass.
7. The sensor of claim 1 , wherein the second tape-covered band includes Kapton tape.
8. The sensor of claim 1 , wherein the third tape-covered band includes Kapton tape.
9. The sensor of claim 1 , wherein the fourth tape-covered band includes Kapton tape.
10. The sensor of claim 1 , wherein the tube includes rubber.
11. The sensor of claim 1 , wherein the tube includes a braided metallic tube.
12. A resistive sensor, comprising:
a tube, wherein the tube includes a lumen;
a metal element extending though the tube from a proximal end to a distal end, the metal element including a coiled portion within the tube, and the metal element returning from the distal end to the proximal end exterior to the tube;
a first tape-covered band connecting the metal element to the proximal end of the tube;
a second tape-covered band connecting the metal element to the distal end of the tube;
a third tape-covered band connecting the metal element to itself at a portion of the metal element exterior to the distal end of the tube, the third band forming a loop in the metal element at an end of the third band opposite the tube; and
a fourth tape-covered band connecting the metal element to itself at a portion of the metal element exterior to the proximal end of the tube;
wherein the metal element originates and terminates near the proximal end of the tube, enabling the sensor to be used with communication electronics disposed at the proximal end of the tube.
13. The sensor of claim 12 , wherein the lumen includes a fluid.
14. The sensor of claim 13 , wherein the fluid includes a high temperature fluid.
15. The sensor of claim 14 , wherein the high temperature fluid includes a fluid heated to at least 260 degrees centigrade.
16. The sensor of claim 14 , wherein the high temperature fluid includes heated glue.
17. The sensor of claim 12 , wherein the tube includes rubber.
18. The sensor of claim 12 , wherein the tube includes a braided metallic tube.
19. The sensor of claim 12 , wherein the fourth band includes the same type of material as the third band.
20. The sensor of claim 12 , wherein the tube is flexible.