Magnetostrictive sensing systems and methods are disclosed. One such system comprises a magnetostrictive wire having first and second ends. A magnet is movable along a length of the magnetostrictive wire. An excitation device is operable to apply an electrical excitation signal to the magnetostricti
Magnetostrictive sensing systems and methods are disclosed. One such system comprises a magnetostrictive wire having first and second ends. A magnet is movable along a length of the magnetostrictive wire. An excitation device is operable to apply an electrical excitation signal to the magnetostrictive wire. A torsional motion sensor is operable to detect a torsional motion of the magnetostrictive wire. A reflective termination is configured to reflect the torsional motion of the magnetostrictive wire. A processor is in communication with the excitation device and the torsional motion sensor. The processor is programmed to (i) apply the electrical excitation signal to the magnetostrictive wire with the excitation device, (ii) identify whether the torsional motion detected by the torsional motion sensor has been reflected by the reflection termination, and (iii) calculate a position of the magnet along the magnetostrictive wire based on only the detected torsional motion reflected by the reflection termination.
대표청구항▼
1. A system for magnetostrictive sensing comprising: a magnetostrictive wire having a first end and a second end;a magnet disposed adjacent a portion of the magnetostrictive wire, the magnet movable along a length of the magnetostrictive wire;an excitation device coupled to the first end of the magn
1. A system for magnetostrictive sensing comprising: a magnetostrictive wire having a first end and a second end;a magnet disposed adjacent a portion of the magnetostrictive wire, the magnet movable along a length of the magnetostrictive wire;an excitation device coupled to the first end of the magnetostrictive wire, the excitation device operable to apply an electrical excitation signal to the magnetostrictive wire;a torsional motion sensor positioned adjacent the first end of the magnetostrictive wire, the torsional motion sensor operable to detect a torsional motion of the magnetostrictive wire;a reflective termination coupled to the second end of the magnetostrictive wire, the reflective termination configured to reflect the torsional motion of the magnetostrictive wire; anda processor in communication with the excitation device and the torsional motion sensor, the processor programmed to (i) apply the electrical excitation signal to the magnetostrictive wire with the excitation device, (ii) identify whether the torsional motion detected by the torsional motion sensor has been reflected by the reflection termination, and (iii) calculate a position of the magnet along the magnetostrictive wire based on the detected torsional motion reflected by the reflection termination and without using any torsional motion that propagated directly from the magnet to the first end of the wire. 2. The system of claim 1, further comprising: a return wire coupled to the second end of the magnetostrictive wire. 3. The system of claim 1, further comprising: a damping termination coupled to the first end of the magnetostrictive wire, the damping termination configured to substantially prevent any reflection of the torsional motion of the magnetostrictive wire. 4. The system of claim 1, wherein the processor identifies whether torsional motion detected by the torsional motion sensor has been reflected by the reflection termination based on a time duration between the application of the excitation signal to the magnetostrictive wire and the detection of the torsional motion by the torsional motion sensor. 5. The system of claim 4, wherein the time duration is greater than a length of time required for the torsional motion to traverse an entire length of the magnetostrictive wire, and less than twice the length of time required for the torsional motion to traverse the entire length of the magnetostrictive wire. 6. The system of claim 1, wherein the processor identifies whether torsional motion detected by the torsional motion sensor has been reflected by the reflection termination based on a number of torsional motions detected by the torsional motion sensor. 7. The system of claim 6, wherein the processor identifies whether torsional motion detected by the torsional motion sensor has been reflected by the reflection termination if the torsional motion is a second torsional motion detected by the torsional motion sensor following the application of the excitation signal. 8. The system of claim 1, wherein the processor identifies whether torsional motion detected by the torsional motion sensor has been reflected by the reflection termination based on a direction of the torsional motion. 9. A method for magnetostrictive sensing comprising: applying an electrical excitation signal to a magnetostrictive wire with an excitation device coupled to a first end of the magnetostrictive wire;detecting a torsional motion of the magnetostrictive wire with a torsional motion sensor positioned adjacent the first end of the magnetostrictive wire;identifying whether the torsional motion detected by the torsional motion sensor has been reflected by a reflection termination coupled to a second end of the magnetostrictive wire; andcalculating a position of a magnet along the magnetostrictive wire based on the torsional motion reflected by the reflection termination and without using any torsional motion that propagated directly from the magnet to the first end of the wire. 10. The method of claim 9, wherein the identification step is based on a time duration between the applying step and the detecting step. 11. The method of claim 10, wherein the time duration is greater than a length of time required for the torsional motion to traverse an entire length of the magnetostrictive wire, and less than twice the length of time required for the torsional motion to traverse the entire length of the magnetostrictive wire. 12. The method of claim 9, wherein the identification step is based on a number of torsional motions detected by the torsional motion sensor. 13. The method of claim 12, wherein the identifying step comprises identifying a second torsional motion detected by the torsional motion sensor as being the torsional motion that has been reflected by the reflection termination. 14. The method of claim 9, wherein the identification step is based on a direction of the torsional motion detected by the torsional motion sensor. 15. A system for magnetostrictive sensing comprising: a magnetostrictive wire having a first end and a second end;a magnet disposed adjacent a portion of the magnetostrictive wire, the magnet movable along a length of the magnetostrictive wire;an excitation device positioned adjacent the first end of the magnetostrictive wire, the excitation device operable to apply a torsional excitation signal to the magnetostrictive wire;an electrical sensor electrically coupled to the magnetostrictive wire, the electrical sensor operable to detect an electrical pulse propagating along the magnetostrictive wire;a reflective termination coupled to the second end of the magnetostrictive wire, the reflective termination configured to reflect the torsional excitation signal propagating along the magnetostrictive wire; anda processor in communication with the excitation device and the electrical sensor, the processor programmed to (i) apply the torsional excitation signal to the magnetostrictive wire with the excitation device, (ii) identify whether the electrical pulse detected by the electrical sensor was generated by the torsional excitation signal after the torsional excitation signal was reflected by the reflection termination, and (iii) calculate a position of the magnet along the magnetostrictive wire based on the detected electrical pulse generated by the torsional excitation signal after the torsional excitation signal was reflected by the reflection termination and without using any electrical pulse generated by torsional motion that propagated directly from the magnet to the first end of the wire. 16. The system of claim 15, further comprising: a return wire coupled to the second end of the magnetostrictive wire. 17. The system of claim 15, further comprising: a damping termination coupled to the first end of the magnetostrictive wire, the damping termination configured to substantially prevent any reflection of the torsional excitation signal of the magnetostrictive wire. 18. The system of claim 15, wherein the processor identifies whether electrical pulse detected by the electrical sensor was generated by the torsional excitation signal after the torsional excitation signal was reflected by the reflection termination based on a time duration between the application of the torsional excitation signal to the magnetostrictive wire and the detection of the electrical pulse by the electrical sensor. 19. The system of claim 18, wherein the time duration is greater than a length of time required for the torsional excitation signal to traverse an entire length of the magnetostrictive wire, and less than twice the length of time required for the torsional excitation signal to traverse the entire length of the magnetostrictive wire. 20. The system of claim 15, wherein the processor identifies whether electrical pulse detected by the electrical sensor was generated by the torsional excitation signal after the torsional excitation signal was reflected by the reflection termination based on a number of electrical pulses detected by the electrical sensor. 21. The system of claim 20, wherein the processor identifies whether electrical pulse detected by the electrical sensor was generated by the torsional excitation signal after the torsional excitation signal was reflected by the reflection termination if the electrical pulse is a second electrical pulse detected by the electrical sensor following the application of the torsional excitation signal. 22. The system of claim 15, wherein the processor identifies whether electrical pulse detected by the electrical sensor was generated by the torsional excitation signal after the torsional excitation signal was reflected by the reflection termination based on a polarity of the electrical pulse. 23. A method for magnetostrictive sensing comprising: applying a torsional excitation signal to a magnetostrictive wire with an excitation device positioned adjacent a first end of the magnetostrictive wire;detecting an electrical pulse propagating along the magnetostrictive wire with an electrical sensor electrically coupled to the first end of the magnetostrictive wire;identifying whether the electrical pulse detected by the electrical sensor was generated by the torsional excitation signal after the torsional excitation signal was reflected by a reflection termination coupled to a second end of the magnetostrictive wire; andcalculating a position of a magnet along the magnetostrictive wire based on the detected electrical pulse generated by the torsional excitation signal after the torsional excitation signal was reflected by the reflection termination and without using any electrical pulse generated by torsional motion that propagated directly from the magnet to the first end of the wire. 24. The method of claim 23, wherein the identification step is based on a time duration between the applying step and the detecting step. 25. The method of claim 24, wherein the time duration is greater than a length of time required for the torsional excitation signal to traverse an entire length of the magnetostrictive wire, and less than twice the length of time required for the torsional excitation signal to traverse the entire length of the magnetostrictive wire. 26. The method of claim 23, wherein the identification step is based on a number of electrical pulses detected by the electrical sensor. 27. The method of claim 26, wherein the identifying step comprises identifying a second electrical pulse detected by the electrical sensor as being the electrical pulse that was generated by the torsional excitation signal after the torsional excitation signal was reflected by a reflection termination. 28. The method of 23, wherein the identification step is based on a polarity of the electrical pulse detected by the electrical sensor.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (60)
Edel, Alan; Edel, Julian; Bloomberg, Yitzhak, Apparatus and method for controlling excitation frequency of magnetostrictive transducer.
Kwun Hegeon ; Teller Cecil M. ; Meyer Roy C. ; Swenson Kendall R., Apparatus and method for monitoring engine conditions, using magnetostrictive sensors.
Blubaugh, James F.; Dietz, Hans P.; Lark, Wayne W.; McIntyre, David J.; Skinner, Thomas G.; Wiltz, Sean P., Fluid cylinder with embedded positioning sensor.
Cullum ; Jr. Clifton D. (Putnam Valley NY) Thompson David A. (South Salem NY) Worthington Thomas K. (Tarrytown NY), Magnetoacoustic position sensor employing pulse code sequence generators and detectors.
Mulrooney Michael J. (Batavia IL) Borthwick ; Jr. James T. (Winfield IL) Janitch Paul G. (Lisle IL) Queyquep Cesar L. (Downers Grove IL), Magnetostrictive sensor.
Ehling Ernst,DEX ; Gass Ernst,DEX ; Ullrich Andreas,DEX ; Kurz Martin,DEX, Method and apparatus for calibrating the output signal of a linear position detector.
Gloden Michael L. (Apex NC) Peterson Wade D. (Morrisville NC) Russell Lawrence J. (Knightdale NC), Modular magnetostrictive displacement sensor having a waveguide protected by a material with a thermal coefficient of ex.
Brunsch Arwed,DEX ; Ehling Ernst,DEX ; Kurz Martin,DEX ; Petrik Jurgen,DEX, Modular waveguide assembly for a position sensor and method for making the same.
Blubaugh,James F.; Hamasagar,Arun M.; McIntyre,David J.; Skinner,Thomas G.; Wiltz,Sean P., Position sensing cylinder cap for ease of service and assembly.
Peterson Wade D. (Morrisville NC) Hellwig Joachim (Ldenscheid DEX) Heuckelbach Rainer (Ldenscheid DEX), System and method for measuring the absolute position of one body which is constrained to move with respect to another b.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.