Interrogator system for identifying electrical circuits

Patent · Tue Apr 12 00:00:00 EDT 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
• Resource Relation: Patent File Date: 10 Jul 1986
• Country of Publication: United States
• Language: English

Related Subjects

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