CN-116366382-B - System and method for network cascade power receiving and communication

CN116366382BCN 116366382 BCN116366382 BCN 116366382BCN-116366382-B

Abstract

The invention provides a network cascade power receiving and communicating system and method, wherein the system comprises power supply equipment, at least two cascade power receiving equipment, a first stage of power receiving equipment is connected with the power supply equipment and receives power from the power supply equipment, the power receiving equipment for supplying power to the next stage comprises a first network interface, a second network interface and a relay, the first network interface or the second network interface supplies power to the power receiving equipment where the first network interface or the second network interface is located after being powered on, and the relay is respectively connected with the first network interface and the second network interface and short-circuits power supply pins of the first network interface and the second network interface after being conducted and supplies power to the next stage of power receiving equipment through the first network interface or the second network interface. According to the invention, the power supply pins of the two network interfaces of the power receiving equipment are short-circuited through the relay, so that the function of continuously supplying power to the next-stage power receiving equipment after the power receiving equipment receives power is realized.

Inventors

LIU JIANHUA
WANG HUIJUN
QIU DESHUO
LI YUANSHEN

Assignees

广州彩熠灯光股份有限公司

Dates

Publication Date: 20260512
Application Date: 20230329

Claims (8)

1. A system for network cascading power and communications, comprising: the power supply equipment is used for providing power supply voltage and is standard power supply equipment with a power over Ethernet protocol module; The power receiving equipment is connected with the power supply equipment at the first stage, receives power from the power supply equipment, and is standard power receiving equipment with a power over Ethernet protocol module; The powered equipment for supplying power to the next stage comprises a first network interface, a second network interface, a relay, a power receiving main circuit module, a power supply module, a first power receiving network transformer and a second power receiving network transformer; the first power receiving network transformer and the second power receiving network transformer respectively comprise a plurality of primary windings, two ends of each primary winding of the first power receiving network transformer are respectively and correspondingly connected with pins of the first network interface, and two ends of each primary winding of the second power receiving network transformer are respectively and correspondingly connected with pins of the second network interface; The first network interface or the second network interface supplies power for the power receiving equipment where the first network interface or the second network interface is located after power is received; The relay is respectively connected with the first network interface and the second network interface, and short-circuits power supply pins of the first network interface and the second network interface after being conducted, and supplies power to next-stage power receiving equipment through the first network interface or the second network interface; The power receiving main circuit module is connected with the relay, and when detecting that the voltage value of the power supply module reaches a preset value, the power receiving main circuit module delays for a preset time and then controls the relay to be conducted; The power module is connected with the first network interface or the second network interface.
2. The system for network cascade power receiving and communicating according to claim 1, wherein the power supply equipment comprises a power supply main circuit module, a power supply network transformer and a power supply network port; the main circuit module is connected with the power supply network port through the network transformer and is connected with the network transformer.
3. The system of claim 2, wherein the network transformer comprises a plurality of primary windings, two ends of each primary winding are respectively connected with pins of the power supply network port, wherein middle tap ends of two primary windings are respectively connected with positive and negative ends of the power supply module, and middle tap ends of the rest primary windings are respectively connected with the power supply network port and the same power supply polarity end of the power supply module.
4. The system according to claim 1, wherein the first network interface is used as a master network interface for receiving power from a power supply device or the power receiving device at the previous stage and respectively connecting with the positive terminal and the negative terminal of the power supply module to supply power to the power supply module, and the second network interface is used as a slave network interface and connected with the negative terminal of the power supply module, and is used for connecting a power supply pin at the positive terminal with a power supply pin at the positive terminal of the first network interface when the relay is conducted and supplying power to the power receiving device at the next stage.
5. The system of claim 1, wherein the first network interface and the second network interface are connected in series with a diode after being shorted to a ground pin, and are connected in parallel to the power module of the power receiving main circuit module.
6. The system of claim 1, wherein the grounding pins of the first network interface and the second network interface are respectively connected with a rectifier bridge after being shorted, and then are connected in parallel to the power module of the power receiving main circuit module.
7. The system of claim 5 or 6, wherein the power supply pins of the first network interface and the second network interface are respectively connected with the relay, and the power supply pins of the first network interface and the second network interface are shorted after the relay is turned on.
8. A method for network cascade power receiving and communication, applied to the system for network cascade power receiving and communication according to any one of claims 1-7, wherein the power supply device is a standard power supply device with a power over ethernet protocol module, and the power receiving device is a standard power receiving device with a power over ethernet protocol module, and the power receiving device for supplying power to the next stage comprises a first network interface, a second network interface, a relay, a power receiving main circuit module, a power supply module, a first power receiving network transformer and a second power receiving network transformer, and the method comprises: the first-stage power receiving device obtains a power supply voltage from the power supply device through a first network interface or the second network interface; When the power receiving main circuit module detects that the voltage value of the power supply module reaches a preset value, the relay is controlled to be conducted after delaying for a preset time; Shorting the power supply pins of the first network interface and the second network interface after the relay is conducted, and supplying power to second-stage power receiving equipment through the first network interface or the second network interface; When the second-stage power receiving device needs to supply power to the next-stage power receiving device, the second-stage power receiving device has the same structure as the first-stage power receiving device, and the power supply control process of the first-stage power receiving device is repeated; And the same is repeated until the last-stage power receiving equipment receives power, and power supply control is finished without supplying power to the next-stage power receiving equipment.

Description

System and method for network cascade power receiving and communication Technical Field The invention relates to the field of light control, in particular to a system and a method for network cascade power receiving and communication. Background POE is a technology for transmitting limited low voltage dc power over standard communication cables, collectively Power Over Ethernet, i.e., power and ethernet data are transmitted simultaneously over a network cable. The POE system consists of PSE (Power Sourcing Equipment) and PD (Powered Device) linked by a network cable. PSE is a device for powering other devices, and PD is a device for receiving power in POE power supply system. In the working process of standard POE power supply, PSE equipment and PD equipment are standard POE equipment with a POE protocol module compatible with IEEE802.3AF/AT standard, namely standard PSE equipment and standard PD equipment, and POE equipment without the POE protocol module is generally called nonstandard POE equipment, comprising nonstandard PSE equipment and nonstandard PD equipment. The standard POE has a series of handshaking protocols, the power supply voltage is provided in stages, the PD provides a characteristic resistance to the PSE when the PSE and the PD are connected via an ethernet cable, then the PSE provides a safety range detection voltage of 2.7V to 10.1V, current measurement is performed at least twice within 500ms, and the two test point voltages have a voltage difference of at least 1V, and when the detection characteristic resistance is within a predetermined range, the PSE performs power classification on the PD and outputs a rated voltage. The existing standard POE does not support cascade power supply of powered equipment, and limits the application of the POE. Disclosure of Invention In view of the above drawbacks of the prior art, an object of the present invention is to provide a system and a method for network cascade power reception and communication, which are used for solving the technical problem that the prior art cannot supply power to a power reception device cascade. The invention provides a network cascade power receiving and communicating system which comprises power supply equipment, at least two cascade power receiving equipment, a first stage of power receiving equipment and a second stage of power receiving equipment, wherein the power supply equipment is connected with the power supply equipment and receives power from the power supply equipment, the power receiving equipment for supplying power to the next stage comprises a first network interface, a second network interface and a relay, the first network interface or the second network interface supplies power to the power receiving equipment where the first network interface or the second network interface is located after power is received, the relay is respectively connected with the first network interface and the second network interface, and power supply pins of the first network interface and the second network interface are short-circuited after the relay is conducted, and the power supply pins of the next stage of equipment are supplied with power through the first network interface or the second network interface. In one embodiment of the invention, the power supply equipment comprises a power supply main circuit module, a power supply network transformer and a power supply network port, wherein the main circuit module is connected with the power supply network port through the network transformer and is connected with the network transformer. In an embodiment of the invention, the network transformer comprises a plurality of primary windings, wherein two ends of each primary winding are respectively connected with pins of the power supply network port, wherein middle tap ends of two primary windings are respectively connected with positive and negative ends of the power supply module, and each middle tap end of the rest primary windings is respectively connected with the same power supply polarity end of the power supply network port and the power supply module. In an embodiment of the invention, the powered device for supplying power to the next stage comprises a power receiving main circuit module, a power supply module, a first power receiving network transformer and a second power receiving network transformer, wherein the first network interface and the second network interface are respectively connected with the power receiving main circuit module through the first power receiving network transformer and the second power receiving network transformer, the first power receiving network transformer and the second power receiving network transformer respectively comprise a plurality of primary windings, two ends of each primary winding of the first power receiving network transformer are respectively and correspondingly connected with a pin of a first power supply network port, two ends of each primary winding of the