CURRENT LOOP DETECTION SYSTEM AND CURRENT LOOP DETECTION METHOD THEREOF

• US 20120249120A1
• Filed: 06/06/2011
• Published: 10/04/2012
• Est. Priority Date: 03/30/2011
• Status: Abandoned Application

• Current Assignee: Institute For Information Industry
• Original Assignee: Institute For Information Industry
• Inventors: LO, Pi-Chuan, CHANG, Shu-Li
• Application Number:
  US13/154,372
• Publication Number:
  US 20120249120A1
• Time in Patent Office: Days
• US Class Current: 324/76.11
• CPC Class Codes: G01R 31/58 Testing of lines, cables or conductors testing of electric windings G01R31/72
• CPC Class Codes: H04B 2203/5495 having measurements and testing channel

Abstract

A current loop detection system and a current loop detection method thereof are provided. The current loop detection system includes a characteristic load, a current measuring apparatus and a user apparatus. The characteristic load connects to a current loop electrically, and generates a current characteristic waveform while operating. The current measuring apparatus connects to a current source electrically. The user apparatus connects to the current measuring apparatus via a first connection. The current measuring apparatus transmits an output current waveform of the current source to the user apparatus via the first connection. The user apparatus determines that the output current waveform corresponds to the current characteristic waveform and, according to a result of the determination, determines that the current source connects to the current loop electrically.

Claims

1. A current loop detection method for use in a current loop detection system, the current loop detection system comprising a current measuring apparatus, a characteristic load and an user apparatus, the current measuring apparatus connecting to the user apparatus via a first connection, the current loop detection method comprising the steps of:

(a) enabling the characteristic load to connect to a current loop electrically, wherein the characteristic load generates a current characteristic waveform while the characteristic load operates;

(b) enabling the current measuring apparatus to connect to a current source electrically and to transmit an output current waveform of the current source to the user apparatus via the first connection;

(c) enabling the user apparatus to determine that the output current waveform corresponds to the current characteristic waveform; and

(d) enabling the user apparatus to determine that the current source connects to the current loop electrically according to a result of the step (c).

2. The current loop detection method as claimed in claim 1, wherein the step (a) further comprises the step of:

(a1) enabling the characteristic load to operate based on the current characteristic waveform after a predetermined period.

3. The current loop detection method as claimed in claim 1, wherein the user apparatus connects to the characteristic load via a second connection, and the user apparatus decides the current characteristic waveform of the characteristic load via the second connection.

4. The current loop detection method as claimed in claim 1, wherein the current measuring apparatus connects to the characteristic load via a second connection, and the user apparatus decides the current characteristic waveform of the characteristic load through the current measuring apparatus via the first connection and the second connection.

5. The current loop detection method as claimed in claim 1, wherein the current characteristic waveform is one of a square waveform, a sine waveform, a triangle waveform, a pulse waveform and a sawtooth waveform.

6. A current loop detection system, comprising:

a characteristic load, being configured to connect to a current loop electrically, wherein the characteristic load generates a current characteristic waveform while the characteristic load operates;

a current measuring apparatus, being configured to connect to a current source electrically; and

an user apparatus, being configured to connect to the current measuring apparatus via a first connection;

wherein the current measuring apparatus transmits an output current waveform of the current source to the user apparatus via the first connection, and the user apparatus determines that the current source connects to the current loop electrically according to a result of the determination of the output current waveform corresponding to the current characteristic waveform.

7. The current loop detection system as claimed in claim 6, wherein the characteristic load operates based on the current characteristic waveform after a predetermined period.

8. The current loop detection system as claimed in claim 6, wherein the user apparatus connects to the characteristic load via a second connection, and the user apparatus decides the current characteristic waveform of the characteristic load via the second connection.

9. The current loop detection system as claimed in claim 6, wherein the current measuring apparatus connects to the characteristic load via a second connection, and the user apparatus decides the current characteristic waveform of the characteristic load through the current measuring apparatus via the first connection and the second connection.

10. The current loop detection system as claimed in claim 6, wherein the current characteristic waveform is one of a square waveform, a sine waveform, a triangle waveform, a pulse waveform and a sawtooth waveform.