Measuring and testing – Dynamometers – Responsive to multiple loads or load components
Patent
1990-01-24
1991-04-30
Ruehl, Charles A.
Measuring and testing
Dynamometers
Responsive to multiple loads or load components
7386268, 73DIG4, 310319, 310800, G01L 116, G01L 516
Patent
active
050107739
ABSTRACT:
A sensor tip (10) for use in a robotic hand has a three-dimensional compliant elastomeric body (12) with an outer boundary (22) having a circular base (24) and a convex surface (26) extending therefrom. Four strain transducers (14, 16, 18, and 20) produce electrical signals indicative of the strain at various positions near the boundary of the elastomeric body (12) resulting from forces exerted upon the sensor tip (10) by an object which the robotic hand is manipulating. The transducers (14, 16, 18, and 20) are positioned about the convex surface (26) so as to produce signals that may be decoupled to determine the normal and tangential forces and the applied torque. A buffer amplifier circuit (34), one for each of the transducers (14, 16, 18, and 20), receives the signals and provides quasi-steady state force information. The circuit (34) connects the respective transducer (40) in a feedback loop around an amplifier (36) and has desirable attributes for static charge buffering. The sensor tip (10) is calibrated to determine proportionality constants for the decoupling algorithm for use of a force delivering system (60), which uses voice coils (74) to apply a force that is linearly related to the current introduced to each of the coils (74). A method of manufacture of the sensor tip (10) results in improved bonding between the transducers (14, 16, 18, and 20) and the elastomeric body (12) for better performance and longer life of the sensor tip (10).
REFERENCES:
patent: 4099409 (1978-07-01), Edmond
patent: 4328441 (1982-05-01), Kroeger, Jr. et al.
patent: 4414984 (1983-11-01), Zarudiansky
patent: 4478089 (1984-10-01), Aviles et al.
patent: 4526043 (1985-07-01), Boie et al.
patent: 4555954 (1985-12-01), Kim
patent: 4566845 (1986-01-01), Al Mouhamed et al.
patent: 4620436 (1986-11-01), Hirabayashi et al.
patent: 4640137 (1987-02-01), Trull et al.
patent: 4658233 (1987-04-01), Uchida et al.
patent: 4694231 (1987-09-01), Alvite
patent: 4715235 (1987-12-01), Fukui et al.
patent: 4745812 (1988-05-01), Amazeen et al.
patent: 4817440 (1989-04-01), Curtin
patent: 4821584 (1989-04-01), Lembke
patent: 4823618 (1989-04-01), Ramming
P. Dario et al., "An Anthropomorphic Robot Finger for Investigating Artificial Tactile Perception," The International Journal of Robotics Research, vol. 6, No. 3, Fall 1987, pp. 25-48.
R. Bardelli et al., "Piezo-and Pyroelectric Polymers Skin-Like Tactile Sensors for Robots and Prostheses," 13th International Symposium on Industrial Robot Technology, vol. 2, pp. 18-45 to 18-56. The exact publication date is unclear but prior to May 1987.
R. Bajcsy, "What Can We Learn from One Finger Experiments," Robotics Research, Brady & Paul, editors, pp. 509-527. Published prior to May 1987.
A. F. Davis et al., "Corrugated PVDF Bimorphs as Tactile Sensors and Microactuators--A Research Note," Robotica, vol. 1, pp. 239-240, 1984.
S. Hackwood et al., "Torque-Sensitive Tactile Array for Robotics," 3rd Conference on Robotic Vision and Sensory Control, 1983, pp. 602-607.
L. D. Harmon, "A Sense of Touch Begins to Gather Momentum," Sensor Review, vol. 2, Apr. 1981, pp. 82-88.
W. D. Hillis, "Active Touch Sensing," A. I. Memo 629, Massachusetts Institute of Technology Artificial Intelligence Laboratory, 1981.
E. Keller, "Piezoelectric Substances, Strain Gages, and Other Sensors Give Robots a Feel for the Job," Electronics, vol. 56, No. 23, Nov. 17, 1983, pp. 119-121.
E. Kolm et al., "How Piezoelectric Devices Earn Their Keep," Chemtech, vol. 13, 1983, pp. 180-186.
D. H. Mott et al., "An Experimental Very High Resolution Tactile Sensor Array," Proceedings of the 4th International Conference on Robot Vision and Sensory Controls, pp. 241-250. Published prior to May 1987.
T. J. Nelson et al., "Shear-Sensitive Magnetoresistive Robotic Tactile Sensor," preprint dated Mar. 12, 1986.
K. E. Pennywitt, "Robotic Tactile Sensing," Byte, Jan. 1986, pp. 177-200.
J. A. Purbrick, "A Force Transducer Employing Conductive Silicone Rubber," Proceedings of the 1st International Conference on Robot Vision and Sensory Controls, Apr. 1-3, 1981, pp. 73-80.
M. H. Raibert et al., "Design and Implementation of a VLSI Tactile Sensing Computer," The International Journal of Robotics Research, vol. 1, No. 3, 1982, pp. 3-18.
J. Rebman et al., "A Tactile Sensor with Electrooptical Transduction," Proceedings of the 3rd International Conference on Robot Vision and Sensory Controls, 1983, pp. 210-214.
R. N. Stauffer, "Progress in Tactile Sensor Development," Robotics Today, vol. 5, No. 3, Jun. 1983, pp. 43-45.
W. E. Snyder et al., "Conductive Elastomers as Sensor for Industrial Parts Handling," IEEE Transactions on Instrumentation and Measurements, vol. IM-27, No. 1, Mar. 1978, pp. 94-99.
J. Severwright, "Tactile Sensor Arrays: The Other Option," Sensor Review, Jan. 1983, pp. 27-29.
B. E. Robertson et al., "Tactile Sensor System for Robotics," 12th Int
This invention was made with U.S. Government support awarded by the NASA, Grant #: NAGW-975. The U.S. Government has certain rights in this invention.
Jackson Gregory T.
Lorenz Robert D.
Ruehl Charles A.
Wisconsin Alumni Research Foundation
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