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    • 6. 发明专利
    • DE1573396C3
    • 1975-04-17
    • DE1573396
    • 1966-04-29
    • AUTOMATION INDUSTRIES, INC., LOS ANGELES, CALIF. (V.ST.A.)
    • COLLINS, JACK TARPLEY, BOULDER, COL. (V.ST.A.)
    • G01N29/24G01N29/04
    • 1,141,046. Ultrasonic inspection devices; ultrasonic probes. AUTOMATION INDUSTRIES Inc. 18 April, 1966 [21 May, 1965], No. 16936/66. Headings H4D and H4J. [Also in Division H1] An ultrasonic probe for the rapid inspection of sheet material comprises a transducer having a substantially cylindrical active surface and mounted for rotation about the cylinder axis to permit the probe to roll over the material. In the Fig. 2 embodiment for inspecting plywood panels, piezoelectric cylinder 26 is mounted on bearings 56 on shaft 61 sprung at 46 to accommodate vertical motion. An acousticallytransparent resilient wear surface 58 couples ultrasonic energy to the workpiece, and electrical coupling between the cylinder 26 and transmitting/receiving circuitry is provided inductively by stator coil 60 and rotor coil 62 (or capacitively by cylindrical rotor and stator capacitor electrodes in the alternative embodiment of Fig. 3, not shown). Plywood lamination flaws or panel thickness may be monitored by a pulse-echo or through-transmission method, and continuous-wave energy may be used, flaws being detected by changes in intensity of the received signal. In the through-transmission method plywood panels are fed by conveyer between two opposed roller probes and inductive coupling between the two probes is prevented by magnetic screens 72. The transmitting/receiving circuitry is disabled by a switch 70, sensitive to vertical motion of the probe, when no panel is under the probe. Details are given of mechanical devices for correctly positioning the probes when the leading edge of a panel is sensed.
    • 8. 发明专利
    • DE1573401C3
    • 1975-01-30
    • DE1573401
    • 1966-07-20
    • AUTOMATION INDUSTRIES INC., LOS ANGELES, CALIF. (V.ST.A.)
    • MALEY, DALE RAYMOND, BOULDER, COL. (V.ST.A.)
    • G01N25/72G01N21/32
    • 1,151,082. Testing workpieces photoelectrically. AUTOMATION INDUSTRIES Inc. June 21, 1966 [July 26, 1965], No.27718/66. Heading G1A. In a device for detecting flaws in workpieces by heating them and scanning them photo-electrically to detect hot or cold spots, the effect of emissivity variations is minimized by measuring the radiation intensities in two wavelength bands and determining the ratio between them. In a first embodiment, Fig. 1, a small spot 28 on a workpiece 18 is heated by a filament lamp 20, and the workpiece is moved in such a way that radiometers 30, 32 view the spot 28 a predetermined time after heating. The radio-meters view the spot 28 through different filters 44, 46 and the ratio of their output signals is derived by a comparator 48 and displayed on a metor 62 or an oscilloscope 60. Voids, inclusions and variations of thickness show up as hot or cold spots on the oscilloscope 60. The oscilloscope may be photographed and the ratio signal may be used to sound an alarm or operate means to sort the workpieces. In a second embodiment, Fig. 4 (not shown) the two radio -meters are replaced by a single radiometer in front of which a sectored filter disc rotates and the signals corresponding to the two wavebands are separated by a synchronous switch before application to the comparator. The radiometers of both embodiments include chopping wheels to modulate the radiation and permit the use of A. C. circuitry.
    • 9. 发明专利
    • DE1573396B2
    • 1974-08-29
    • DE1573396
    • 1966-04-29
    • AUTOMATION INDUSTRIES, INC., LOS ANGELES, CALIF. (V.ST.A.)
    • COLLINS, JACK TARPLEY, BOULDER, COL. (V.ST.A.)
    • G01N29/24G01N29/04
    • 1,141,046. Ultrasonic inspection devices; ultrasonic probes. AUTOMATION INDUSTRIES Inc. 18 April, 1966 [21 May, 1965], No. 16936/66. Headings H4D and H4J. [Also in Division H1] An ultrasonic probe for the rapid inspection of sheet material comprises a transducer having a substantially cylindrical active surface and mounted for rotation about the cylinder axis to permit the probe to roll over the material. In the Fig. 2 embodiment for inspecting plywood panels, piezoelectric cylinder 26 is mounted on bearings 56 on shaft 61 sprung at 46 to accommodate vertical motion. An acousticallytransparent resilient wear surface 58 couples ultrasonic energy to the workpiece, and electrical coupling between the cylinder 26 and transmitting/receiving circuitry is provided inductively by stator coil 60 and rotor coil 62 (or capacitively by cylindrical rotor and stator capacitor electrodes in the alternative embodiment of Fig. 3, not shown). Plywood lamination flaws or panel thickness may be monitored by a pulse-echo or through-transmission method, and continuous-wave energy may be used, flaws being detected by changes in intensity of the received signal. In the through-transmission method plywood panels are fed by conveyer between two opposed roller probes and inductive coupling between the two probes is prevented by magnetic screens 72. The transmitting/receiving circuitry is disabled by a switch 70, sensitive to vertical motion of the probe, when no panel is under the probe. Details are given of mechanical devices for correctly positioning the probes when the leading edge of a panel is sensed.