Remote data acquisition system and acquisition control method based on multiple nodes

Abstract

The invention discloses a multi-node-based remote data acquisition system and an acquisition control method, and relates to the technical field of multi-node data acquisition, an upper computer is connected with a master control node and acquisition nodes through photoelectric composite cables, and the upper computer sends a control instruction and performs data display; the master control node monitors the power data of each acquisition node, controls the power-on and power-off of the system and each acquisition node cable, sends a data acquisition request to the acquisition nodes, receives data returned by the acquisition nodes and sends the data to the upper computer; and the acquisition nodes acquire data, process the data and feed back the data to the master control node. According to the invention, the control of each acquisition node is realized, the power supply data of each acquisition node is detected in real time, the electric energy supplement of each acquisition node is realized, the normal work of the system is ensured, and the stable and long-distance data acquisition and transmission are realized. The method can be used for data acquisition scenes in geological or water area environments without wireless communication conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-node data acquisition, and in particular to a multi-node-based long-distance data acquisition system and an acquisition control method. Background Art

[0002] The demand for environmental data monitoring is increasing, especially in remote geological or aquatic environments where wireless communications are susceptible to interference or restrictions. However, due to environmental factors, long-distance data transmission is unstable. How to achieve stable, long-distance data collection and transmission in such environments is a key issue that needs to be addressed. Summary of the Invention

[0003] The purpose of the present invention is to provide a multi-node based long-distance data acquisition system and acquisition control method, which are used to solve the problem of poor stability of long-distance data acquisition and transmission in an environment where communication is susceptible to interference in the prior art.

[0004] The present invention solves the above problems through the following technical solutions:

[0005] A multi-node based long-distance data acquisition system includes a host computer, a master control node and multiple acquisition nodes, wherein the host computer and the master control node, and the master control node and the acquisition nodes are connected respectively by optical-electrical composite cables, wherein:

[0006] The host computer is used to send control instructions to the master node and receive and display data sent by the master node;

[0007] The master control node is used to control the power on and off of the system and the optical / electrical composite cables between the collection nodes according to the control instructions of the host computer or the power supply data of the monitored collection nodes, and to send data collection requests to the collection nodes, receive data returned by the collection nodes and send them to the host computer;

[0008] The collection node is used to collect data according to the data collection request of the main control node, process the data and then feed it back to the main control node.

[0009] In the present invention, the host computer, master control node, and each collection node are connected by an optoelectronic composite cable. Data signals are transmitted via optical fiber, achieving stable signal transmission over long distances and effectively avoiding electromagnetic interference. The host computer, master control node, and each collection node are also connected by cables, and each collection node and the master control node are equipped with a cable on / off switch. The master control node is a master cable switch that controls the power supply to the entire cable. Switches at each collection node control whether it is connected to the cable. The master control node can supply power to each collection node via the cable, ensuring the normal operation of the system and achieving stable, long-distance data collection and transmission.

[0010] Furthermore, the master control node is connected to the host computer and the master control node is connected to the collection node via a bus, and the master control node and each collection node are also connected via a cable; the master control node is provided with a main cable switch for controlling the power on and off of the entire cable, and the collection node is provided with a cable switch for controlling whether it is connected to the cable.

[0011] Furthermore, the master control node communicates with the host computer and the acquisition node via a digital to optical fiber bus.

[0012] Furthermore, the type of the digital-to-fiber bus matches the type of the digital signal-to-fiber converters of the master control node and the acquisition node.

[0013] Furthermore, the digital signal-to-fiber converters of the master control node and the collection node are CAN-to-fiber converters or 485-to-fiber converters, or other types of digital-to-fiber converters. Specifically, if the collection node is equipped with a CAN-to-fiber converter, the bus type is a CAN bus. If the collection node is equipped with a 485-to-fiber converter, the bus type is an 485 bus.

[0014] A multi-node based remote data acquisition control method implemented by the multi-node based remote data acquisition system includes:

[0015] Step S1: The host computer transmits a control command to the master control node, which sends a data request to each collection node via a digital to optical fiber bus. After receiving the data request, the collection node collects data, processes the data, and then feeds it back to the master control node.

[0016] Step S2: The master control node transmits environmental data to the host computer for display via a digital to optical fiber bus; and monitors the power data of each acquisition node. Based on the power data and power management strategy, the master control node controls the power on and off of the cable to realize power supply to each acquisition node.

[0017] Furthermore, it also includes: when there is no need to collect environmental data, the host computer sends a control instruction, and the main control node controls the system to cut off power or stop the collection sensor of the collection node from working.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0019] This invention communicates with each node via a data bus to control each data collection node. By monitoring each node's power supply data in real time and implementing power management strategies, it replenishes power to each node, ensuring the proper functioning of the system and enabling stable, long-distance data collection and transmission. This system can be used for data collection in geological or aquatic environments where wireless communication is not possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the connection of each node of the present invention;

[0021] Figure 2 is a system block diagram of the present invention;

[0022] Figure 3 This is a software architecture diagram of the present invention;

[0023] Figure 4 is a flow chart of the present invention;

[0024] Figure 5 This is a schematic diagram of the power management strategy for the master node;

[0025] Figure 6 Schematic diagram of the power management strategy of the acquisition node. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the examples, but the embodiments of the present invention are not limited thereto.

[0027] Example:

[0028] Combined with attachment Figure 1 and Figure 2 As shown, a multi-node long-distance data acquisition system includes a host computer, a master control node, and multiple acquisition nodes. The host computer and the master control node, and the master control node and the acquisition nodes are connected by optical-electrical composite cables, respectively.

[0029] The host computer is used to send control instructions to the master node and receive and display data sent by the master node;

[0030] The master control node is used to control the power on and off of the system and the optical / electrical composite cables between the collection nodes according to the control instructions of the host computer or the power supply data of the monitored collection nodes, and to send data collection requests to the collection nodes, receive data returned by the collection nodes and send them to the host computer;

[0031] The collection node is used to collect data according to the data collection request of the main control node, process the data and then feed it back to the main control node.

[0032] In the present invention, the host computer, master control node, and each collection node are connected by an optoelectronic composite cable. Data signals are transmitted via optical fiber, achieving stable signal transmission over long distances and effectively avoiding electromagnetic interference. The host computer, master control node, and each collection node are also connected by cables, and each collection node and the master control node are equipped with a cable on / off switch. The master control node is a master cable switch that controls the power supply to the entire cable. Switches at each collection node control whether it is connected to the cable. The master control node can supply power to each collection node via the cable, ensuring the normal operation of the system and achieving stable, long-distance data collection and transmission.

[0033] Furthermore, the master control node and the host computer, as well as the master control node and the collection nodes, are connected via a bus. The entire data communication network topology is bus-based, with the communication interfaces of each collection node and the master control node mounted on a single bus. The specific type of bus depends on the digital signal-to-fiber converter equipped with the collection node. If the collection node is equipped with a CAN-to-fiber converter, the bus type is a CAN bus. If the collection node is equipped with an 485-to-fiber converter, the bus type is an 485 bus. The master control node and each collection node are also connected via cables. The master control node is equipped with a main cable switch for controlling the power on and off of the entire cable, and each collection node is equipped with a cable switch for controlling whether it is connected to the cable.

[0034] The master control node communicates with each collection node via a digital-to-fiber bus. Furthermore, the master control node and each collection node are connected via cables, each equipped with a cable on / off switch. The master control node acts as the master cable switch, controlling power to the entire cable. Switches at each collection node control whether it is connected to the cable itself, and the master control node provides power to each collection node via the cable. The master control node communicates with the host computer via a digital-to-fiber bus, transmitting digital collection results and control commands. Once the system is up and running, the master control node sends data requests to each collection node via the digital-to-fiber bus. Upon receiving the data requests, the collection node collects the data, processes it (such as filtering), and then feeds it back to the master control node. The master node transmits environmental data via the digital-to-fiber bus to the host computer for display. In addition, the system can monitor the power supply data of each collection node. Based on the power supply data and power management strategy, it controls the power on and off of the cable to realize power supply to each collection node. When it is not necessary to collect environmental data, the control instructions can be sent through the host computer to control the system to cut off power or stop the sensor from working, ensuring the low power consumption of the system.

[0035] Example 2:

[0036] Based on Example 1, a multi-node long-distance data acquisition and control method includes:

[0037] Once the system is powered on and operating normally, the master control node sends data requests to each collection node via a digital-to-fiber bus. Upon receiving the data requests, the collection nodes collect the data, perform relevant processing (such as filtering), and then feed it back to the master control node. The master control node transmits environmental data to the host computer for display via the digital-to-fiber bus. Furthermore, the system monitors power supply data at each collection node. Based on this data and power management strategies, it controls the power supply to each collection node by turning cables on and off. When environmental data collection is no longer needed, control commands can be sent from the host computer to power down the system or stop the sensors, ensuring the system's low power consumption.

[0038] like Figure 3 As shown in the figure, this system can be divided into three layers from the software level: interaction layer, main control layer and data acquisition layer.

[0039] (1) The interaction layer is the host computer software that presents data results and data communication;

[0040] (2) The main control layer is the main control system software, which mainly implements power management, data acquisition control logic and data communication functions;

[0041] (3) The data acquisition layer is the data acquisition unit software, which mainly realizes power data acquisition, environmental data acquisition, data processing and data communication functions.

[0042] The overall software operation process is as follows Figure 4 As shown, after the system is initialized, the master node performs a working status check and issues an alarm if an abnormal state occurs. Otherwise, the following steps are periodically executed:

[0043] The master control node sends a request to collect environmental data and monitor power data. Each collection node collects and processes the data before sending it to the master control node. Simultaneously, the master control node manages system power, while the collection nodes manage their own power. The master control node sends the environmental data fed back by the collection nodes to the host computer for display. Based on control commands from the host computer or monitored power data, the master control node determines whether to shut down the system or power off a collection node.

[0044] The power management strategy process of the master node is as follows: Figure 5 As shown, after the system is initialized, the following steps are performed periodically:

[0045] The master control node requests the power data of each acquisition node. If all acquisition nodes are fully charged, the cable power supply is cut off. Otherwise, if at least one acquisition node is low on power, the cable power supply is turned on.

[0046] The power management strategy process of the acquisition node is as follows: Figure 6 As shown, the system is initialized and periodically performs the following steps:

[0047] The collection node collects the power of its own power supply and judges the power level. If it is fully charged, the collection node disconnects itself from the cable. If it is low power, the collection node connects to the power supply cable through its own switch until the power is fully charged and then disconnects itself from the cable.

[0048] Although the present invention is described herein with reference to illustrative embodiments of the present invention, the above embodiments are merely preferred embodiments of the present invention, and the embodiments of the present invention are not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A multi-node based remote data acquisition system, comprising a host computer, a master control node and a plurality of acquisition nodes, characterized in that: The host computer and the master control node, and the master control node and the collection node are connected respectively by optical-electrical composite cables, wherein: The host computer is used to send control instructions to the master node and receive and display data sent by the master node; The master control node is used to control the power on and off of the system and the optical / electrical composite cables between the collection nodes according to the control instructions of the host computer or the power supply data of the monitored collection nodes, and to send data collection requests to the collection nodes, receive data returned by the collection nodes and send them to the host computer; The collection node is used to collect data according to the data collection request of the main control node, process the data and then feed it back to the main control node.

2. The multi-node long-distance data acquisition system according to claim 1, characterized in that: The master control node is connected to the host computer and the collection node via a bus, and the master control node and each collection node are also connected via a cable; the master control node is provided with a main cable switch for controlling the power on and off of the entire cable, and the collection node is provided with a cable switch for controlling whether it is connected to the cable.

3. The multi-node long-distance data acquisition system according to claim 1, characterized in that: The master control node communicates with the host computer and the acquisition node via a digital to optical fiber bus.

4. The multi-node long-distance data acquisition system according to claim 3, characterized in that: The type of the digital-to-fiber bus matches the type of the digital signal-to-fiber converters of the master control node and the acquisition node.

5. The multi-node long-distance data acquisition system according to claim 4, characterized in that: The digital signal to fiber optic converter of the master control node and the acquisition node is a CAN to fiber optic converter or a 485 to fiber optic converter.

6. A multi-node based remote data acquisition control method implemented by the multi-node based remote data acquisition system according to any one of claims 1 to 5, characterized in that: include: Step S1: The host computer transmits a control command to the master control node, and the master control node sends a data request to each collection node. After receiving the data request, the collection node collects data, processes the data, and then feeds it back to the master control node; Step S2: The master control node transmits data to the host computer for display; It also monitors the power data of each collection node, and based on the power data and power management strategy, controls the power on and off of the cable to achieve power supply to each collection node.

7. The multi-node based remote data acquisition and control method according to claim 6, characterized in that: Also includes: When data collection is not needed, the host computer sends a control instruction, and the master control node controls the system to power off or stop the collection sensor of the collection node.

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