CN113329546B - Landscape lighting control system with loop type data transmission function and working method thereof - Google Patents

Abstract

The invention belongs to the technical field of landscape lighting systems, and discloses a landscape lighting control system with loop-type data transmission, which comprises a controller and a plurality of sub-controllers; the controller comprises a first gigabit network port and a second gigabit network port; the branch controllers are connected in cascade by hand, and form loop type communication with the controller; each sub-controller comprises a first network port and a second network port, and comprises a forward transmission mode and a reverse transmission mode, wherein the first network port is used as a data receiving interface and the second network port is used as a data transmitting interface in the forward transmission mode; in the reverse transmission mode, the second network port is used as a data receiving interface, and the first network port is used as a data transmitting interface. The first network port and the second network port are integrated with data sending and data receiving functions, and technical support is provided for reliable communication between the controller and the sub-controllers; the double network ports of the controller are used for synchronously outputting the same video data packet, and support is provided for carrying out data forward/reverse complementary transmission by a system loop type design.

Description

A landscape lighting control system with loop data transmission and its working method

Technical Field

The invention belongs to the technical field of landscape lighting systems, and relates to a landscape lighting control system with loop-type data transmission and a working method thereof.

Background technique

Due to landscape lighting, the light array is installed on the facade of the building. The light array has a large range and the sub-controllers are installed in a scattered manner. This open-air scattered installation method causes the sub-controllers to be in a harsh working environment for a long time, causing abnormal network connections to occur frequently, resulting in light array operation failures. On the other hand, since the sub-controllers are installed in a scattered manner on the facade wall, it is difficult to repair and maintain them, and it is difficult to handle faults in a timely and rapid manner, which brings great economic losses to users.

Specifically, as shown in Figure 1, the large-scale landscape lighting system consists of a controller, a sub-controller and a light array. The controller packages the decoded video signal and sends it to the sub-controller via Gigabit Ethernet; the sub-controller receives the data packet distributed to it by the controller according to the IP address, parses it and sends the data to the lamps in accordance with the DMX512 protocol to realize the display of patterns and videos.

The system adopts a distributed system, and the controller and sub-controllers are cascaded. The controller continuously distributes data through data streams to maintain the continuous change of the video image of the light array. Once a sub-controller fails, or a line fails at a certain location, the video data packet cannot be transmitted to the next level, and the subsequent sub-controllers cannot obtain the video update data packet, the light array display will be abnormal. In the application of landscape lighting systems, the light array is installed on the facade of the building, the light array has a large range, the sub-controllers are installed in a scattered manner, and the network wiring distance is relatively long. This scattered open-air installation method makes the sub-controller work in a harsh environment, causing abnormal network connections to occur frequently, which brings pressure on users for repair and maintenance.

Summary of the invention

In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide a landscape lighting control system with loop-type data transmission and a working method thereof, which solves the problem that the data packet cannot be sent to the subsequent sub-controller due to poor contact of a certain network port of the sub-controller, thereby causing great pressure on subsequent maintenance.

The present invention is achieved through the following technical solutions:

A landscape lighting control system with loop-type data transmission, comprising a controller and a plurality of sub-controllers;

The controller adopts a dual Gigabit network port structure, including the first Gigabit network port and the second Gigabit network port;

The first Gigabit network port is connected to the first-level sub-controller, and the sub-controllers are cascaded hand in hand. The last-level sub-controller is connected to the second Gigabit network port to form a loop communication;

Each sub-controller includes a first network port and a second network port, and the first network port and the second network port both integrate data sending and data receiving functions;

The sub-controller is used to detect the existence of the data packet sent by the controller on the communication line, and to switch the input network port and output network port of the sub-controller inversely according to the detection result;

The sub-controller includes a forward transmission mode and a reverse transmission mode. In the forward transmission mode, the first network port is used as a data receiving interface and the second network port is used as a data sending interface; in the reverse transmission mode, the second network port is used as a data receiving interface and the first network port is used as a data sending interface.

Furthermore, the sub-controller has built-in FPGA chip and transceiver. The FPGA chip is connected to the first network port and the second network port respectively through two transceivers. The FPGA chip is used to receive and parse network port data; the transceiver is used to obtain the network cable connection status of the first network port. When the network cable connection of the first network port is normal, the sub-controller adopts forward transmission mode; when the network cable connection of the first network port is abnormal, the sub-controller adopts reverse transmission mode.

Furthermore, the sub-controller is provided with an RS485 interface, and the output end of the FPGA chip is connected to the lamp via the RS485 bus.

Furthermore, the forward transmission mode takes precedence over the reverse transmission mode.

Further, the model of the transceiver is B50612.

Furthermore, the model of the FPGA chip is XC6SLX45T.

The present invention also discloses a working method of the landscape lighting control system with loop-type data transmission, which includes the following process:

The controller packages the decoded video signal and outputs it simultaneously on the first Gigabit network port and the second Gigabit network port;

When a sub-controller detects that the network cable connection of its corresponding first network port is normal, the first network port is used as a data receiving interface and the second network port is used as a data sending interface; when the IP of the data packet parsed by the sub-controller is consistent with the IP of the sub-controller, the parsed data is sent to the lamp; when the IP of the parsed data packet is inconsistent with the current IP, the data packet is forwarded to the next-level sub-controller through the second network port;

When a sub-controller detects that the network cable connection of its corresponding first network port is abnormal, the second network port is used as a data receiving interface and the first network port is used as a data sending interface; when the IP of the data packet parsed by the sub-controller is consistent with the IP of the sub-controller, the parsed data is sent to the lamp; when the IP of the parsed data packet is inconsistent with the current IP, the data packet is forwarded to the next-level sub-controller through the first network port.

Furthermore, the sub-controller has a built-in FPGA chip and a transceiver. When the IP of the data packet parsed by the FPGA chip is consistent with the IP of the current sub-controller, the parsed data is sent to the lamp; when the IP of the parsed data packet is inconsistent with the current IP, the data packet is forwarded to the next-level sub-controller through another network port;

The transceiver obtains the network cable connection status of the first network port. When the network cable connection of the first network port is normal, the sub-controller adopts the forward transmission mode; when the network cable connection of the first network port is abnormal, the sub-controller adopts the reverse transmission mode.

Furthermore, the sub-controller is provided with an RS485 interface, and the FPGA chip sends the parsed data to the lamps through the RS485 bus in accordance with the data format of the DMX512 protocol.

Compared with the prior art, the present invention has the following beneficial technical effects:

The invention discloses a landscape lighting control system for loop data transmission, including a controller and a plurality of sub-controllers; each sub-controller includes a first network port and a second network port, and the first network port and the second network port both integrate data sending and data receiving functions; the sub-controller network port is designed to realize the function of receiving and sending data network ports in two directions, when the connection of the first network port is interrupted, the second network port is used as a data receiving network port, and transmission from the other direction ensures the normal reception of the sub-controller, and provides technical support for reliable communication between the landscape lighting controller and the sub-controller; the controller includes a first gigabit network port and a second gigabit network port, the first gigabit network port is connected to the first-level sub-controller, and the sub-controllers are cascaded hand in hand, and the last-level sub-controller is connected to the second gigabit network port to form a loop communication; the controller adopts a dual gigabit network port structure, and synchronously outputs the same video data packet through the dual gigabit network ports, providing support for the system loop design to perform data forward/reverse complementary transmission. The loop design of the system cascade of the present invention, and the complementation of the system data forward transmission/reverse transmission, realize data reliability transmission.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a block diagram of a conventional landscape lighting control system;

FIG2 is a diagram showing video data transmission under normal working conditions of the landscape lighting control system of the present invention;

FIG3 is a diagram of video data transmission in the case of abnormal operation of the landscape lighting control system of the present invention;

FIG4 is a schematic diagram of the structure of a sub-controller of the present invention;

FIG5 shows two working modes of the sub-controller, FIG5 (a) is the forward transmission mode, and FIG5 (b) is the forward transmission mode;

FIG. 6 is a flowchart of the present invention.

Detailed ways

The present invention is further described in detail below in conjunction with the accompanying drawings:

As shown in FIG2 , the present invention discloses a landscape lighting control system with loop data transmission, including a controller and a plurality of sub-controllers; the controller adopts a dual gigabit network port structure, including a first gigabit network port and a second gigabit network port, and the two network ports synchronously output decoded video data packets; the first gigabit network port is connected to the first-level sub-controller, and the sub-controllers are cascaded hand in hand, and the last-level sub-controller is connected to the second gigabit network port to form a loop communication; each sub-controller includes a first network port and a second network port, and the first network port and the second network port both integrate data sending and data receiving functions.

The sub-controller includes a forward transmission mode and a reverse transmission mode. In the forward transmission mode, the first network port is used as a data receiving interface and the second network port is used as a data sending interface; in the reverse transmission mode, the second network port is used as a data receiving interface and the first network port is used as a data sending interface.

As shown in FIG4 , the sub-controller has a built-in FPGA chip and a transceiver PHY. The sub-controller is provided with an RS485 interface. The FPGA chip is connected to the first network port and the second network port respectively through two transceivers. The output end of the FPGA chip is connected to the lamp through the RS485 bus.

The FPGA chip is used to receive and parse network port data; when the IP of the data packet parsed by the FPGA chip is consistent with the IP of the current sub-controller, the parsed data is sent to the lamp through the RS485 bus in the data format of the DMX512 protocol; when the IP of the parsed data packet is inconsistent with the current IP, the data packet is forwarded to the next-level sub-controller through another network port; the transceiver is used to obtain the network cable connection status of the first network port. When the network cable connection of the first network port is normal, the sub-controller adopts the forward transmission mode; when the network cable connection of the first network port is abnormal, the sub-controller adopts the reverse transmission mode.

As shown in FIG5 , the sub-controller has two working modes, and it is agreed that the forward transmission mode takes precedence over the reverse transmission mode.

As shown in FIG5( a ), in the forward transmission mode, the video data packet is received by the first network port and the video data packet is forwarded to the second network port;

As shown in FIG5( b ), in the reverse transmission mode, the video data packet is received by the second network port, and the video data is forwarded to the first network port;

Under normal circumstances, the sub-controller works in the forward transmission mode, the first network port receives the video data packet and forwards the video data to the second network port; under abnormal circumstances, the second network port receives the video data packet and forwards it to the first network port.

After the sub-controller is powered on, it first enters the forward transmission mode. In the forward working mode, the sub-controller receives the video data packet through the first network port, and obtains the network cable connection status through the transceiver PHY of the first network port. If the video data packet is not received within a given time, it enters the reverse transmission mode; in the reverse transmission mode, if the sub-controller detects that the first network port can normally receive the video data packet, it enters the forward transmission mode.

Abnormal modes are:

(1) Obtain the network cable connection status of the first network port through the transceiver PHY. If it is displayed as not connected, it enters an abnormal state;

(2) The second network port can receive video data packets normally, but the first network port cannot.

As shown in FIG6 , the working method of the landscape lighting control system with loop-type data transmission includes the following process:

The controller packages the decoded video signal and outputs it simultaneously on the first Gigabit network port and the second Gigabit network port;

When a sub-controller detects that the network cable connection of its corresponding first network port is normal, the first network port is used as a data receiving interface and the second network port is used as a data sending interface; when the IP of the data packet parsed by the sub-controller is consistent with the IP of the sub-controller, the parsed data is sent to the lamp; when the IP of the parsed data packet is inconsistent with the current IP, the data packet is forwarded to the next-level sub-controller through the second network port;

When a sub-controller detects that the network cable connection of its corresponding first network port is abnormal, the second network port is used as a data receiving interface and the first network port is used as a data sending interface; when the IP of the data packet parsed by the sub-controller is consistent with the IP of the sub-controller, the parsed data is sent to the lamp; when the IP of the parsed data packet is inconsistent with the current IP, the data packet is forwarded to the next-level sub-controller through the first network port.

Under normal circumstances, the transmission direction of the video data packet is as shown in Figure 2, which is output from the first gigabit network port of the controller, input through the first network port of the first-level sub-controller, output from the second network port, and sequentially transmitted to the first network port of sub-controller n, so that each sub-controller can normally receive video data. This is the so-called forward transmission mode; as shown in Figure 3, when the network cable between sub-controller i and sub-controller i+1 fails, sub-controllers i+1 to sub-controller n cannot receive video data through the first network port. At this time, sub-controllers i+1 to sub-controller n automatically switch to reverse transmission mode, that is, receive video data packets from the second network port of sub-controller n, and output video data packets from the first network port, that is, the i+1th to nth sub-controllers enter the reverse transmission mode. In this way, it is ensured that even if the line failure between the i-th and i+1-th sub-controllers does not affect the normal operation of the system.

The original landscape lighting control system was redesigned by adopting the method provided by the present invention and successfully applied in practice, with the failure rate reduced by more than 60%.

The main improvements of the present invention are concentrated on:

The controller's Gigabit Ethernet port has been improved from 1 to 2, and they have exactly the same structure and output the same video signal at the same time;

The FPGA code of the sub-controller has been redesigned to change the original one-way video data packet transmission method. The video transmission direction can be switched according to the presence or absence of video data at the detection network port.

The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims (5)

1. The landscape lighting control system with the loop type data transmission is characterized by comprising a controller and a plurality of sub-controllers;

The controller adopts a double-gigabit network port structure and comprises a first gigabit network port and a second gigabit network port;

The first kilomega network port is connected with the first stage branch controllers, the branch controllers are connected in cascade by adopting handles, and the last stage branch controller is connected with the second kilomega network port to form loop type communication;

Each sub-controller comprises a first network port and a second network port, and the first network port and the second network port integrate data sending and data receiving functions;

The branch controller is used for detecting whether the data packet sent by the controller on the communication line exists or not, and switching the input network port and the output network port of the branch controller according to the detection result;

The sub-controller comprises a forward transmission mode and a reverse transmission mode, wherein in the forward transmission mode, the first network port is used as a data receiving interface, and the second network port is used as a data transmitting interface; in the reverse transmission mode, the second network port is used as a data receiving interface, and the first network port is used as a data transmitting interface;

the branch controller is internally provided with an FPGA chip and a transceiver, the FPGA chip is respectively connected with a first network port and a second network port through the two transceivers, and the FPGA chip is used for receiving and analyzing network port data; the transceiver is used for acquiring the network cable connection state of the first network port, and when the network cable connection of the first network port is normal, the sub-controller adopts a forward transmission mode; when the network cable connection of the first network port is abnormal, the sub-controller adopts a reverse transmission mode;

the transceiver model number B50612; the model of the FPGA chip is XC6SLX45T;

the working method of the landscape lighting control system with the loop type data transmission comprises the following steps:

the controller packages the decoded video signals and outputs the video signals on the first gigabit network port and the second gigabit network port simultaneously;

When a certain sub-controller monitors that the network cable connection of the corresponding first network port is normal, the first network port is used as a data receiving interface, and the second network port is used as a data sending interface; when the IP of the data packet analyzed by the sub-controller is consistent with the IP of the sub-controller, the analyzed data is sent to the lamp; when the IP of the analyzed data packet is inconsistent with the current IP, forwarding the data packet to a next-stage controller through a second network port;

When a branch controller monitors that the network cable of a corresponding first network port is connected abnormally, the second network port is used as a data receiving interface, and the first network port is used as a data sending interface; when the IP of the data packet analyzed by the sub-controller is consistent with the IP of the sub-controller, the analyzed data is sent to the lamp; when the IP of the analyzed data packet is inconsistent with the current IP, forwarding the data packet to a next-stage controller through a first network port;

The sub-controller obtains the network cable connection state through a transceiver PHY of a first network port, and enters a reverse transmission mode if a video data packet is not received within a given time; in the reverse transmission mode, if the sub-controller detects that the first network port can normally receive the video data packet, the sub-controller enters the forward transmission mode.

2. The landscape lighting control system with the loop-back type data transmission function according to claim 1, wherein an RS485 interface is arranged on the sub-controller, and the output end of the FPGA chip is connected with the lamp through an RS485 bus.

3. A loop-back data transmission landscape lighting control system according to claim 1, wherein the forward transmission mode is preferred over the reverse transmission mode.

4. The landscape lighting control system with the loop-type data transmission according to claim 1, wherein when the IP of the data packet analyzed by the FPGA chip is consistent with the IP of the current sub-controller, the analyzed data is sent to the lamp; when the IP of the analyzed data packet is inconsistent with the current IP, forwarding the data packet to a next-stage controller through another network port;

The transceiver acquires the network cable connection state of the first network port, and when the network cable connection of the first network port is normal, the sub-controller adopts a forward transmission mode; when the network cable connection of the first network port is abnormal, the sub-controller adopts a reverse transmission mode.

5. The method of claim 2, wherein the FPGA chip transmits the parsed data to the lamp according to the data format of the DMX512 protocol and through the RS485 bus.