Analog-digital control device

Details Analog-digital control device Analog-digital control device

1980-05-12

1982-02-09

Ruehl, Charles A.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

73 73, G01N 300

Patent

active

043144829

ABSTRACT:
An analog digital control device having both analog and digital memory with multiple, readily accessible, selectable access ports to allow the control device to be quickly programmed by unskilled personnel and thus render the device particularly useful for the laboratory environment. The device includes a multiplexer switch for receiving both digital and analog input and for generating an output to a comparator to run an external component. An accessing and switching circuit is repeatedly used to access each of the multiple channels of digital memory in sequence.

REFERENCES:
patent: 3304768 (1967-02-01), Naumann et al.
patent: 3583214 (1971-06-01), Kreiskorte et al.
patent: 3803906 (1974-04-01), Ross
G. B. Kubiceck, "Programming Dynamic Tests", Instruments & Control Systems, Mar. 1961, pp. 463-465.
H. T. Strandrud, "Structural Fatigue Testing by Computer Control", Proceedings of the 15th International ISA Aerospace Instrumentation Symposium, May 1969, pp. 249-255.
E. M. Wu, et al. "Computer-Aided Mechanical Testing of Composites", Materials Research & Standards vol. 12, No. 2, Feb. 1972, pp. 13-18.

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