Monitor, light control system, and light fixture control method

Patent metadata

Field	Value
Publication number	US-10612759-B2
Application number	US-201916284683-A
Country	US
Kind code	B2
Filing date	Feb 25, 2019
Priority date	Feb 24, 2018
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

Abstract

A monitor, including a first wiring terminal group, a second wiring terminal group, and a grounding terminal, where the first wiring terminal group includes a first wiring terminal and a second wiring terminal, the first wiring terminal is configured to couple to a conducting wire of a cable, and the second wiring terminal is configured to couple to one end of a primary coil of an isolation transformer, the second wiring terminal group includes a third wiring terminal and a fourth wiring terminal, the third wiring terminal is configured to couple to the conducting wire of the cable, and the fourth wiring terminal is configured to couple to the other end of the primary coil of the isolation transformer, and the grounding terminal is configured to couple to a grounding medium of the cable.

First claim

What is claimed is:

1. A monitor, comprising:
a first wiring terminal group comprising a first wiring terminal and a second wiring terminal, wherein the first wiring terminal is configured to couple to a conducting wire of a cable, and wherein the second wiring terminal is configured to couple to a first primary wiring terminal of an isolation transformer;
a second wiring terminal group coupled to the first wiring terminal group and comprising a third wiring terminal and a fourth wiring terminal, wherein the third wiring terminal is configured to couple to the conducting wire of the cable, and wherein the fourth wiring terminal is configured to couple to a second primary wiring terminal of the isolation transformer;
a grounding terminal configured to couple to a grounding medium of the cable;
a first power supply terminal configured to couple to a secondary output terminal of the isolation transformer; and
a second power supply terminal configured to couple to a light fixture.

2. The monitor of claim 1 , further comprising:
a light control circuit coupled to the first power supply terminal and the second power supply terminal;
controller coupled to the light control circuit; and
a power line communication (PLC) circuit, wherein the PLC circuit comprises a digital communication port and a carrier communication port, wherein the digital communication port is coupled to the controller, wherein the carrier communication port is coupled to the first wiring terminal and the grounding terminal, and wherein the PLC circuit is configured to:
obtain, through demodulation, a control signal from a first power line carrier signal transmitted on the cable; and
send the control signal to the controller,

wherein the controller is configured to control the light control circuit based on the control signal, and
wherein the light control circuit is and configured to maintain, under control of the controller, a coupling between the first power supply terminal and the second power supply terminal.

3. The monitor of claim 2 , wherein the light control circuit is further configured to indicate a light fixture status, and wherein the controller is further configured to:
generate a report signal based on the light fixture status read from the light control circuit; and
send the report signal to the PLC circuit, and
wherein the PLC circuit is further configured to:
modulate the report signal onto a second power line carrier signal; and
transmit a modulated second power line carrier signal to the cable.

4. The monitor of claim 1 , further comprising a first capacitor circuit, wherein one end of the first capacitor circuit is coupled to the second wiring terminal, and wherein the other end of the first capacitor circuit is coupled to the third wiring terminal and the fourth wiring terminal.

5. The monitor of claim 4 , wherein the first capacitor circuit comprises a first capacitor.

6. The monitor of claim 4 , wherein the first capacitor circuit comprises a first capacitor and a first fuse, wherein one end of the first capacitor is coupled to one end of the first fuse, wherein the other end of the first capacitor is coupled to the second wiring terminal, and wherein other end of the first fuse is coupled to the third wiring terminal and the fourth wiring terminal.

7. The monitor of claim 4 , wherein the first capacitor circuit comprises a first capacitor and a first fuse, wherein one end of the first capacitor is coupled to one end of the first fuse, wherein the other end of the first capacitor is coupled to the fourth wiring terminal, and wherein the other end of the first fuse is coupled to the third wiring terminal and the second wiring terminal.

8. The monitor of claim 1 , further comprising:
a light control circuit coupled to the first power supply terminal and the second power supply terminal;
a controller coupled to the light control circuit; and
a power Line communication (PLC) circuit, wherein the PLC circuit comprises a digital communication port and a carrier communication port, wherein the digital communication port is coupled to the controller, wherein the carrier communication port is coupled to the first wiring terminal and the grounding terminal, and wherein the PLC circuit is configured to:
obtain, through demodulation, a control signal from a first power lire carrier signal transmitted on the cable; and
send the control signal to the controller,
wherein the controller is configured to control the light control circuit based on the control signal, and
wherein the light control circuit is configured to break, under control of the controller, a coupling between the first power supply terminal and the second power supply terminal.

9. The monitor of claim 8 , wherein the light control circuit is further configured to indicate a light fixture status, and wherein the controller is further configured to:
generate a report signal based on the light fixture status read from the light control circuit; and
send the report signal to the PLC circuit, and
wherein the PLC circuit is further configured to:
modulate the report signal onto a second power line carrier signal; and
transmit a modulated second power line carrier signal to the cable.

10. A light control system, comprising:
a master monitor; and
a slave monitor coupled to the master monitor and comprising;
a first wiring terminal group comprising a first wiring terminal and a second wiring terminal, wherein the first wiring terminal is configured to couple to a conducting wire of a cable, and wherein the second wiring terminal is configured to couple to a first primary wiring terminal of an isolation transformer;
a second wiring terminal group coupled to the first wiring terminal group and comprising a third wiring terminal and a fourth wiring terminal, wherein the third wiring terminal is configured to couple to the conducting wire of the cable, and wherein the fourth wiring terminal is configured to couple to a second primary wiring terminal of the isolation transformer;
a grounding terminal configured to couple to a grounding medium of the cable;
a first power supply terminal configured to couple to a secondary output terminal of the isolation transformer; and
a second power supply terminal configured to couple to a light fixture,

wherein the master monitor is coupled to the conducting wire and the grounding medium of the cable proximate to an output port of a constant current regulator and configured to:
generate a first power line carrier signal; and
send the first power line carrier signal to the slave monitor using the cable, and

wherein the slave monitor is configured to:
directly receive the first power line carrier signal from the cable; and
control the light fixture based on the first power line carrier signal.

11. The light control system of claim 10 , further comprising a second capacitor circuit, wherein two ends of the second capacitor circuit are configured to couple to two ends of the conducting wire of the cable proximate to the output port of the constant current regulator.

12. The light control system of claim 11 , wherein the second capacitor circuit comprises a second capacitor.

13. The light control system of claim 11 , wherein the second capacitor circuit comprises a second capacitor and a second fuse, and wherein one end of the second capacitor is coupled to one end of the second fuse.

14. The light control system of claim 10 , wherein the slave monitor further comprises a first capacitor circuit, wherein one end of the first capacitor circuit is coupled to the second wiring terminal, and wherein the other end of the

Assignees

• Huawei Tech Co Ltd

Inventors

• Wan Junqiao
• Huang Jinbo
• Pan Wang

Classifications

• F21V23/026

  Fastening of transformers or ballasts · CPC title

• H01F27/2823

  Wires (H01F27/2866 takes precedence) · CPC title

• F21S2/005

  of modular construction · CPC title

• H04B3/54 Primary

  Systems for transmission via power distribution lines · CPC title

• B64F1/18

  Visual or acoustic landing aids · CPC title