Interrogator system for identifying electrical circuits

Details Interrogator system for identifying electrical circuits Interrogator system for identifying electrical circuits

1986-07-10

1988-04-12

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Connecting or disconnecting

364480, 340310A, 340310R, H02J 100, H04M 1104, G08C 1916

Patent

active

047376570

ABSTRACT:
A system for interrogating electrical leads to correctly ascertain the identity of equipment attached to remote ends of the leads. The system includes a source of a carrier signal generated in a controller/receiver to be sent over the leads and an identifier unit at the equipment. The identifier is activated by command of the carrier and uses a portion of the carrier to produce a supply voltage. Each identifier is uniquely programmed for a specific piece of equipment, and causes the impedance of the circuit to be modified whereby the carrier signal is modulated according to that program. The modulation can be amplitude, frequency or phase modulation. A demodulator in the controller/receiver analyzes the modulated carrier signal, and if a verified signal is recognized displays and/or records the information. This information can be utilized in a computer system to prepare a wiring diagram of the electrical equipment attached to specific leads. Specific circuit values are given for amplitude modulation, and the system is particularly described for use with thermocouples.

REFERENCES:
patent: 3786423 (1974-01-01), Martell
patent: 4476535 (1984-10-01), Loshing et al.
patent: 4652855 (1987-03-01), Weikel

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