Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Nonquantitative
Patent
1985-12-05
1988-05-17
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Nonquantitative
324 60R, G01R 1914, G01R 1152, G01R 2726
Patent
active
047453591
ABSTRACT:
A method for polarity recognition of electronic components, and an arrangement for carrying out the method are presented. An application for the invention is in the automatic assembling of circuitboards by robots, wherein components present in the form of bulk material must be placed in order. If the polarity of the components is not evident from their exterior structural conventional mechanical ordering methods are not applicable. According to the invention, for components in which a terminal is connected with the electrically insulted foil electrode (2), the currents which, when a-c voltages are applied to the terminals (3, 4) of the component (1), flow capacitively across the outer foil (2) to a probe (6) are evaluated as signal for the polarity of the component (1). In an arrangement for carrying out this method, which comprises a circuit for the generation of mutually phase-shifted a-c voltages (u.sub.1, u.sub.2) and for the evaluation of the phase of measured signals picked up by means of a probe relative to the output signal, the probe (6) is adapted to conform to the exterior shape of the component (1) over a large area to form a sufficiently great capacitance. One adaption of the probe conforms to a negative mold (7) for the component (1) and can be applied to it or placed thereon.
REFERENCES:
patent: 2895106 (1959-07-01), Taunt
IBM Technical Disclosure Bulletin, vol. 26, No. 2, Jul. 1983, Roop et al., "Reverse Capacitor Tester".
Caracappa David N.
Eisenzopf Reinhard J.
Siemens Aktiengesellschaft
Snow Walter E.
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