TORQUE-MEASURING DEVICE, TORQUE-MEASURING FLANGE AND TORQUE-MEASURING METHOD

• US 20100307218A1
• Filed: 11/13/2008
• Published: 12/09/2010
• Est. Priority Date: 11/13/2007
• Status: Abandoned Application

• Current Assignee: Gif Gesellschaft Fuer Industrieforschung Mbh
• Original Assignee: Gif Gesellschaft Fuer Industrieforschung Mbh
• Inventors: Meuter, Herbert, Koslowski, Michael
• Application Number:
  US12/734,573
• Publication Number:
  US 20100307218A1
• Time in Patent Office: Days
• US Class Current: 73/1.09
• CPC Class Codes: G01L 25/003 for measuring torque
• CPC Class Codes: G01L 3/108 involving resistance strain gauges

Abstract

In order to minimize the risk of artifacts in a torque measuring device, a torque measuring flange and a torque measuring method, the invention proposes that the evaluation device has means for storing a variable which is proportional to a freewheel torque and means for compensating a measured value with the stored variable.

Claims

1. Torque-measuring device with a torque-measuring flange and an evaluation system, at wherein the evaluation system has means for storing a value proportional to a freewheeling torque and means for the compensation of a measured value with the saved value.

2. Torque-measuring device according to claim 1, wherein the storage means are provided on the torque-measuring flange.

3. Torque-measuring device according to claim 1, wherein the compensation means are provided on the torque-measuring flange.

4. Torque-measuring device according to claim 1, wherein the storage means comprise means for storing a value proportional to a speed-dependent freewheeling torque with assignment to a speed.

5. Torque-measuring device according to claim 1, further comprising a sensor provided on the torque-measuring flange for identifying a value dependent on the speed.

6. Torque-measuring device according to claim 5, further comprising a rotationally fixed signal transmitter for a signal to be detected by the sensor during each rotation.

7. Torque-measuring device, according to claim 1, with a torque-measuring flange and an evaluation system, wherein the evaluation system comprises a memory for storing a zero point of the torque-measuring flange over time.

8. Torque-measuring device according to claim 7, wherein the evaluation system comprises means for determining a zero-point drift.

9. Torque-measuring device according to claim 8, wherein the evaluation system comprises means for displaying the zero-point drift.

10. Torque-measuring device according to claim 8, wherein the evaluation system comprises means for compensating the zero-point drift.

11. Torque-measuring flange with a measuring device for measuring a value proportional to a torque acting on the torque-measuring flange, comprising an evaluation unit provided on the torque-measuring flange which has means for storing a value proportional to a freewheeling torque.

12. Torque-measuring flange according to claim 11, wherein the evaluation unit has means for the compensation of a measured value with the saved value.

13. Torque-measuring flange according to claim 11, wherein the storage means comprise means for storing a value proportional to a speed-dependent freewheeling torque with assignment to a speed.

14. Torque-measuring flange according to claim 11, further comprising a sensor provided on the torque-measuring flange for identifying a value dependent on the speed.

15. Torque-measuring flange according to claim 11, further comprising transmission means for sending out the measurement result.

16. Torque-measuring flange, according to claim 11, wherein at least the regions which are conventionally loaded with a torque are formed from titanium.

17. Torque-measuring flange according to claim 16, wherein the titanium grade is between 1 and 10.

18. Torque-measuring flange, according to claim 11, further comprising a load change hysteresis below 0.03% of the nominal torque.

19. Method for torque measurement, wherein a freewheeling torque is initially identified and the identified torque measured value is then compensated with the freewheeling torque.

20. Torque measurement method according to claim 19, wherein the freewheeling torque is identified in a speed-dependent manner.

21. Torque measurement method according to claim 19, wherein the compensation takes place on a rotating torque-measuring flange.

22. Torque measurement method according to claim 21, wherein a compensated measurement result is sent out by the torque-measuring flange.

23. Method for torque measurement, according to claim 19, wherein a zero-point drift is initially determined and the identified torque measured value is then compensated with the zero-point drift.

24. Torque measurement method according to claim 23, wherein zero points are stored for zero-point drift identification at a constant temperature.

25. Torque measurement method according to claim 23, wherein zero points are stored for zero-point drift identification if the torque measured lies below a threshold value across a plurality of measurements.