CN104320803A - Data monitoring and fault diagnosis method based on Zigbee node redundancy - Google Patents

Abstract

The invention provides a data monitoring and fault diagnosis method based on Zigbee node redundancy. The data monitoring and fault diagnosis method based on Zigbee node redundancy comprises the steps that multiple wireless transmission redundancy channels are built; data collected by a terminal device are sent to configuration software of an upper computer finally through a wireless network according to a DDE protocol, and remote monitoring is conducted on the data through the configuration software; a fault diagnosis mechanism based on a TCL scripting language and the configuration software is built. Through the data monitoring and fault diagnosis method based on Zigbee node redundancy, the problems that the number of wireless nodes is large and maintenance is difficult can be solved, and sable and safe operation of the Zigbee wireless network is effectively guaranteed.

Description

Data monitoring and fault diagnosis method based on Zigbee node redundancy

technical field

The present invention relates to Zigbee wireless networking technology, in particular to the wireless communication technology of field equipment and configuration software, the fault diagnosis technology of wireless nodes and the integration technology of TCL address polling software and configuration software.

Background technique

At present, the single-path wireless communication method of "terminal node-relay node-central node" is mostly used between field devices and industrial computers in many enterprises, which can only ensure the normal operation of the wireless network in a short period of time. Failure, the location of the faulty node cannot be detected timely and accurately, which brings great difficulties to system maintenance. Therefore, whether the wireless network composed of Zigbee nodes can operate reliably is related to the economic benefits and safety issues of the entire production, and the network's Reasonable establishment and addition of node fault diagnosis mechanism is an important prerequisite to ensure the final stable operation of the system.

Contents of the invention

The purpose of the present invention is to solve the problem of unstable operation and difficult maintenance in the existing wireless network of the enterprise, and proposes a method for establishing, monitoring and fault self-diagnosis of the wireless network. The method is based on Zigbee node redundancy technology, with the help of DDE communication protocol, The configuration software and TCL scripting language establish the wireless communication between field devices and configuration software, forming a reliable wireless node fault diagnosis mechanism.

The technical scheme adopted in the present invention is:

A data monitoring and fault diagnosis method based on Zigbee node redundancy, comprising the following steps:

Step 1 Establish a Zigbee wireless network with redundant paths;

Specifically, the central node, relay node and terminal node in the Zigbee wireless network are redundant;

Step 2 Through the wireless network, the data collected by the terminal equipment is transmitted to the configuration software of the upper computer according to the DDE protocol, and the monitoring is carried out;

The configuration software supports the connection of DDE equipment, and whether there is data display through the configuration interface, tests whether the wireless communication between the field equipment and the upper computer is normal, or reconfigures the wireless node;

Step 3 Establish a fault diagnosis mechanism based on TCL scripting language and configuration software;

Specifically include the following steps:

(1) In the upper computer part of the wireless network, a Zigbee node needs to be added, which has the function of receiving status signals;

(2) The address polling method based on TCL scripts can generate wireless node status log files, which are saved in a fixed path in txt format;

(3) The configuration software reads the wireless node status log file online.

the

Advantages and beneficial effects of the present invention:

It can be seen from the above-mentioned technical scheme adopted by the present invention that the wireless network based on Zigbee node redundancy can realize the remote communication between the field equipment and the upper computer, and solve the problem that the data collected by the field equipment of the enterprise needs remote online monitoring. The Zigbee node dual fault diagnosis mechanism is established by TCL address polling and configuration monitoring, which ensures the safe and reliable operation of the entire wireless network and makes node maintenance more convenient.

the

Description of drawings

Fig. 1 is a schematic flow sheet of the present invention;

Fig. 2 is the Zigbee wireless network structural diagram that the present invention sets up;

Fig. 3 is the TCL-based wireless node status monitoring interface created by the present invention.

the

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to Fig. 1, the present invention proposes a data monitoring and fault diagnosis method based on Zigbee node redundancy.

The method comprises the steps of:

The first step is to establish a Zigbee wireless network with redundant paths; specifically, to make redundant central nodes, relay nodes and terminal nodes in the Zigbee wireless network;

In this embodiment, the structure of the established Zigbee wireless network is shown in FIG. 2 , and the wireless nodes of the network are composed of a central node, a relay node and a terminal node. The central node is responsible for data collection, which is divided into two types of nodes, one is the status signal monitoring node, and the other is the on-site data collection receiving node, which is composed of nodes a, b and c, and these three nodes are respectively connected to the host computer , select the SZ02 model module with data transmission function: node a is configured as a central node type, broadcast sending mode, and is responsible for receiving on-site collected data; node b is configured as a central node type, broadcast sending mode, and is redundant for node a; node c is configured It is a relay node type and a protocol sending mode, which is responsible for polling the addresses of each wireless node and monitoring the operating status of the wireless module in real time. The relay node is responsible for the transfer of long-distance wireless data. It is composed of nodes d, e, f and g. The SZ06 model module with data acquisition function is selected. These 4 nodes are configured as relay routing type and broadcast sending mode. The wireless network selects two nodes (nodes d and f) for wireless network coverage, and nodes e and g are respectively used as relay nodes for redundancy. The terminal node is mainly used for wireless transmission of on-site data collection. It is composed of nodes h and i. These two nodes are connected to different types of terminal equipment through serial ports. The SZ02 model module with data transmission function is selected, and both nodes are configured as terminal node types. , broadcast transmission mode, in which node h is the redundancy of node i. the

Step 2 Through the wireless network, the data collected by the terminal equipment is transmitted to the configuration software of the upper computer according to the DDE protocol, and the monitoring is carried out; the configuration software supports the connection of DDE equipment, and whether there is data displayed through the configuration interface is used to test the field equipment Whether the wireless communication with the upper computer is normal, otherwise reconfigure the wireless node;

Step 3 Establish a fault diagnosis mechanism based on TCL script language and configuration software;

The specific operation includes the following steps:

(1) In the upper computer part of the wireless network, a Zigbee node needs to be added to have the function of receiving status signals;

(2) The address polling method based on TCL scripts can generate wireless node status log files, which are saved in a fixed path in txt format;

(3) The configuration software reads the wireless node status log file online.

The present invention has found a fault diagnosis method for Zigbee wireless nodes: by polling the addresses of wireless nodes, the equipment addresses of all wireless nodes are regularly inquired, and the nodes that inquire about the address information will report to the central node (node c in Figure 2) Response information is returned, and the faulty node will not return any response information, and finally achieve the purpose of distinguishing the faulty node from the normal node, and accurately locating the faulty node according to the device address.

On the basis of the diagnosis method, the present invention generates a log file by adopting the address polling mode of the TCL script, so that the configuration software can inquire in real time, and finally forms a Zigbee node double fault diagnosis mechanism.

The present invention will be further described below in conjunction with specific application cases.

The flue gas collection equipment in the enterprise and the industrial computer establish wireless communication through the Zigbee wireless network in Figure 2, and the configuration software on the industrial computer reads the collected data received by the central node (node a in Figure 2) through the DDE protocol. The purpose of data remote monitoring is achieved; the address polling method based on TCL script has two functions of status display and data verification. It sends address polling data packets to each wireless node through node c, and responds to data packets according to the obtained address Display the corresponding status of each node. The monitoring interface is shown in Figure 3. When node 02 is operating normally, the corresponding indicator light is blinking blue. When other nodes fail, the corresponding indicator light is red and static. These monitoring results are displayed in text It can be saved in the wireless node status log file in the way of the wireless node, which can be checked regularly by the staff. At the same time, the integrity and accuracy of the response data packet can be verified online, and the stability of the wireless communication can be monitored in real time according to the verification result; on the one hand, the configuration software It is used to monitor the collected data transmitted wirelessly, and on the other hand, it is used to view the status log of wireless nodes in real time. In this way, the purpose of remote monitoring of data collection and dual diagnosis of node status is realized.

The present invention is based on a wireless network with Zigbee node redundancy, which can realize stable communication between field devices and host computers, and solves the need for remote online monitoring of data collected by field devices. CL address polling and configuration monitoring are two ways to establish Zigbee nodes. The dual fault diagnosis mechanism ensures the safety of the entire wireless network and can be tested for problems, while running by T.

Claims (4)

1., based on data monitoring and the method for diagnosing faults of Zigbee node redundancy, it is characterized in that, the method comprises the steps:

1st step sets up the Zigbee wireless network with redundant path;

The data that terminal equipment is gathered by this wireless network by the 2nd step are according to the configuration software of DDE protocol transmission to host computer, and enforcement is monitored;

3rd step sets up the failure diagnosis mechanism based on TCL script and configuration software.

2. method according to claim 1, is characterized in that: in described 1st step, do redundancy respectively to the Centroid in Zigbee wireless network, via node and terminal node.

3. method according to claim 1, it is characterized in that: in described 2nd step, configuration software supports DDE equipment connection, is shown with or without data by configuration interface, whether the radio communication of test site equipment and host computer is normal, otherwise reconfigures radio node.

4. method according to claim 1, is characterized in that: in described 3rd step, in the epigynous computer section of wireless network, and need to set up a Zigbee node, this node possesses the function of accepting state signal; Address polling mode based on TCL script can generate radio node status log file, under being kept at fixing path with the form of txt; Configuration software reads radio node status log file online.