Interrogator system for identifying electrical circuits

Patent · 12 April 1988

OSTI ID:7266235

Jatko, W B; McNeilly, D R

A system for interrogating electrical leads to correctly ascertain the identity of equipment attached to remote ends of the leads is disclosed. 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. 6 figs.

• Research Organization: Union Carbide Corporation
• DOE Contract Number: W-7405-ENG-26
• Assignee: ORO; EDB-94-118363
• Patent Number(s): US 4737657; A
• Application Number: PPN: US 6-884102
• OSTI ID: 7266235
• Country of Publication: United States
• Language: English

Related Subjects

440800* -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
COMPUTER OUTPUT DEVICES
COMPUTER-GRAPHICS DEVICES
COMPUTERS
CONDUCTOR DEVICES
DATA ANALYSIS
DESIGN
DISPLAY DEVICES
ELECTRIC MEASURING INSTRUMENTS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
EQUIPMENT
IDENTIFICATION SYSTEMS
MEASURING INSTRUMENTS
MODULATION