CN212484348U - Ocean sensor array data transmission bus based on RS-485 - Google Patents
Ocean sensor array data transmission bus based on RS-485 Download PDFInfo
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- CN212484348U CN212484348U CN202020832183.4U CN202020832183U CN212484348U CN 212484348 U CN212484348 U CN 212484348U CN 202020832183 U CN202020832183 U CN 202020832183U CN 212484348 U CN212484348 U CN 212484348U
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Abstract
The utility model discloses a marine sensor array data transmission bus based on RS-485, which is characterized in that the bus comprises a plurality of acquisition transmission nodes distributed in seawater step by step from shallow to deep, and each acquisition transmission node comprises a power module, a singlechip master control module, a marine environment sensing module, an RS-485 sending module, a first RS-485 receiving module and a second RS-485 receiving module; the multi-loop relay type bus topological structure is adopted, the acquisition transmission node of the current stage is connected with the acquisition transmission node of the adjacent stage through the first RS-485 twisted pair, and is connected with the acquisition transmission node of the alternate stage through the second RS-485 twisted pair, the acquisition transmission node at the uppermost stage is connected with the upper computer, and the transmission efficiency is higher; the redundancy of the system is improved, the fault acquisition and transmission node can be maintained in time, and the transmission reliability of the acquired data under the marine complex environment is ensured.
Description
Technical Field
The utility model belongs to the technical field of pull-type ocean sensor array bus and specifically relates to an ocean sensor array data transmission bus based on RS-485.
Background
The method is characterized in that a towing observation system drags an underwater observation system by a tugboat, the underwater observation system is connected with the tugboat by adopting a cable, sensors are arranged on the cable at intervals from top to bottom, the whole underwater observation system is dragged to move forward by the boat in the advancing process to observe a multi-parameter ocean profile, and the array type towing observation system has the characteristics of real-time, high resolution and multi-factor synchronous observation.
The depth of an observation section of the array type towing observation system can reach thousands of meters, the number of sensor nodes arranged on a cable is hundreds, and at present, the existing towing chain adopts an underwater inductive coupling data transmission mode, so that the defects that the transmission speed is limited by the number of underwater nodes and the transmission distance, and the transmission speed is generally low exist; although an RS-485 bus commonly adopted for long-distance transmission has the advantages of low cost, expandability and the like, the defects are obvious, such as a single main structure, low speed, limited information quantity, and only a host polling or token transmission mode can be selected in a medium access mode, a host polling master station sequentially sends polling instructions and control commands to each slave station, and the slave stations reply acquired data and command execution results according to the addresses of the polling instructions of the master station; the existing RS-485 system has low working transmission rate efficiency under long distance, thereby restricting the application of communication under high-speed and long-distance environment, and once a main line on an RS-485 bus fails, the whole transmission system fails, and the system needs to be put into use after fault troubleshooting and maintenance, which is time-consuming and labor-consuming; therefore, how to solve the problem of high-speed real-time transmission of the ocean sensor array under a long-distance and complex working environment is an urgent need to solve at present.
Disclosure of Invention
The utility model aims to solve the technical problem that a higher ocean sensor array data transmission bus based on RS-485 of transmission reliability and transmission efficiency is provided.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: an RS-485-based ocean sensor array data transmission bus comprises a plurality of acquisition transmission nodes distributed in seawater step by step from shallow to deep, each stage of the acquisition transmission nodes comprises a power module, a singlechip main control module, an ocean environment sensing module, an RS-485 transmitting module, a first RS-485 receiving module and a second RS-485 receiving module, the power module is used for supplying power to the singlechip main control module and the ocean environment sensing module, the ocean environment sensing module acquires information of each ocean element in real time according to setting and transmits the information to the singlechip main control module, a first receiving end of the singlechip main control module is connected with a transmitting end of the first RS-485 receiving module, a second receiving end of the singlechip main control module is connected with a transmitting end of the second RS-485 receiving module, the sending end of the single-chip microcomputer main control module is connected with the receiving end of the RS-485 sending module, the first sending end of the RS-485 sending module is connected with the receiving end of the first RS-485 receiving module in the adjacent upper-stage acquisition transmission node through a first RS-485 twisted pair, and the second sending end of the RS-485 sending module is connected with the receiving end of the second RS-485 receiving module in the upward second-stage acquisition transmission node at one stage interval through a second RS-485 twisted pair.
The single-chip microcomputer main control module in the acquisition transmission node of the current stage receives data sent by the RS-485 sending module in the acquisition transmission node of the next stage through the first RS-485 receiving module when detecting that the connection state of the first RS-485 twisted pair is normal, receives data sent by the RS-485 sending module in the acquisition transmission node of the next stage through the second RS-485 receiving module when detecting that the connection state of the first RS-485 twisted pair is abnormal, the single-chip microcomputer main control module in the acquisition transmission node of the current stage sends all the received data to the first RS-485 receiving module in the acquisition transmission node of the previous stage through the RS-485 sending module, and simultaneously, the single-chip microcomputer main control module in the acquisition transmission node of the current stage sends all the received data through the RS-485 receiving module And the 485 sending module sends the data to the second RS-485 receiving module in the acquisition transmission node which is separated by one level and is upward at the second level. When the current-stage acquisition transmission node receives normal data uploading of an adjacent lower-stage acquisition transmission node, the current-stage acquisition transmission node preferentially receives data uploaded by the adjacent lower-stage acquisition transmission node through the first RS-485 twisted pair, and when the connection state of the first RS-485 twisted pair connected with the lower-stage acquisition transmission node is a communication fault, the current-stage acquisition transmission node stops using a fault line, switches to receive data to a downward second-stage acquisition transmission node at one stage of interval through the second RS-485 twisted pair, and has small influence on overall data transmission; when the fault of the adjacent next-stage acquisition and transmission node is repaired and the data is uploaded normally again, the next-stage acquisition and transmission node is switched back to preferentially receive the data uploaded by the adjacent next-stage acquisition and transmission node through the first RS-485 twisted pair, so that the transmission reliability of the acquired data under the marine complex environment is ensured.
The single chip microcomputer main control module adopts an STM32 single chip microcomputer. Like STM32F1 series chips, these chips have been widely used in the field of ocean sensor array buses.
Compared with the prior art, the utility model has the advantages that a multi-loop relay type bus topological structure is adopted, the collection transmission node at the current level is connected with the collection transmission node at the adjacent level through the first RS-485 twisted pair, and is simultaneously connected with the collection transmission node at the interval level through the second RS-485 twisted pair, the collection transmission nodes at the top level and the adjacent lower level are respectively connected with the upper computer on the ship, each collection transmission node which normally works gradually transmits data upwards in each data uploading period until transmitting to the upper computer, meanwhile, as long as the data transmission time between the upper computer and the next collection transmission node is less than the data uploading interval time, the total distance of the bus and the number of the nodes on the bus can be infinitely increased, and the transmission speed between the collection transmission nodes is not influenced by the length of the bus and the number of the nodes, the transmission efficiency is high;
when data transmission of one of the first-stage acquisition transmission nodes fails, the adjacent previous-stage acquisition transmission node of the failure node can read data of the next-stage acquisition transmission node of the failure node through the second RS-485 twisted pair line, and the failure acquisition transmission node can be maintained in time while the overall transmission is not influenced, so that the failure acquisition transmission node can be continuously put into use after being maintained, the redundancy of the system is improved, and the transmission reliability of the acquired data under the ocean complex environment is ensured.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a block diagram of a structure of an acquisition and transmission node in the embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
An RS-485-based ocean sensor array data transmission bus comprises a plurality of acquisition transmission nodes 1 distributed in seawater step by step from shallow to deep, each stage of acquisition transmission nodes 1 comprises a power module 11, a singlechip main control module 12, an ocean environment sensing module 13, an RS-485 transmitting module 14, a first RS-485 receiving module 15 and a second RS-485 receiving module 16, the power module 11 is used for supplying power for the singlechip main control module 12 and the ocean environment sensing module 13, the ocean environment sensing module 13 acquires information of each ocean element in real time according to setting and transmits the information to the singlechip main control module 12, a first receiving end of the singlechip main control module 12 is connected with a transmitting end of the first RS-485 receiving module 15, a second receiving end of the singlechip main control module 12 is connected with a transmitting end of the second RS-485 receiving module 16, the sending end of the single chip microcomputer main control module 12 is connected with the receiving end of the RS-485 sending module 14, the first sending end of the RS-485 sending module 14 is connected with the receiving end of the first RS-485 receiving module 15 in the adjacent upper-stage acquisition transmission node 1 through the first RS-485 twisted pair 21, the second sending end of the RS-485 sending module 14 is connected with the receiving end of the second RS-485 receiving module 16 in the upward second-stage acquisition transmission node 1 at one stage interval through the second RS-485 twisted pair 22, the single chip microcomputer main control module 12 in the acquisition transmission node 1 receives the data sent by the RS-485 sending module 14 in the next-stage acquisition transmission node 1 through the first RS-485 receiving module 15 when detecting that the connection state of the first RS-485 twisted pair 21 is normal, and receives the data sent by the upward second RS-485 receiving module 16 at one stage interval when detecting that the connection state of the first RS-485 twisted pair 21 is abnormal The data that RS-485 sending module 14 sent in the transmission node 1 is gathered to lower second grade, this level gathers transmission node 1 in singlechip main control module 12 with all received data through RS-485 sending module 14 sending to the first RS-485 receiving module 15 in the transmission node 1 of last grade collection, simultaneously, this level gathers transmission node 1 in singlechip main control module 12 with all received data through RS-485 sending module 14 sending to the interval one-level upwards second grade gather transmission node 1 in second RS-485 receiving module 16, singlechip main control module 12 adopts STM32 singlechip.
In the above embodiment, the single-chip microcomputer main control module 12 of the current stage collection and transmission node 1 monitors the uploading of the next stage collection and transmission node through the RS-485 bus, during a detection process, the maximum waiting time of the current stage collection and transmission node 1 is set to T, if the data uploaded by the next stage collection and transmission node 1 through the first RS-485 twisted pair 21 is not received within the time T, the connection state of the first RS-485 twisted pair 21 connected with the next stage collection and transmission node 1 is marked as a communication error, and the time T is waited again, if the current stage collection and transmission node 1 does not receive the normal data uploading of the next stage collection and transmission node 1 within the time T for two consecutive times, the connection state of the first RS-twisted pair 21 connected with the next stage collection and transmission node 1 is marked as a communication fault, if the current stage collection and transmission node 1 receives the normal data uploading of the next stage collection and transmission node 1 within the time 2T, the data uploaded by the next-level acquisition and transmission node 1 through the first RS-485 twisted pair 21 is preferentially received, when the connection state of the first RS-485 twisted pair 21 connected with the next-level acquisition and transmission node 1 is a communication fault, the current-level acquisition and transmission node 1 stops using a fault line, the data is switched to be received by the next-level acquisition and transmission node 1 at one level below through the second RS-485 twisted pair 22, when the fault of the next-level acquisition and transmission node 1 is repaired and the data is uploaded normally again, the data uploaded by the next-level acquisition and transmission node 1 through the first RS-485 twisted pair 21 is preferentially received, and the acquisition and transmission nodes at the top level and the next level are respectively connected with an upper computer on the ship 3 to upload the data.
Claims (3)
1. An RS-485-based ocean sensor array data transmission bus is characterized by comprising a plurality of acquisition transmission nodes distributed in seawater step by step from shallow to deep, wherein each acquisition transmission node comprises a power supply module, a singlechip main control module, an ocean environment sensing module, an RS-485 transmitting module, a first RS-485 receiving module and a second RS-485 receiving module, the power supply module is used for supplying power to the singlechip main control module and the ocean environment sensing module, the ocean environment sensing module acquires information of each ocean element in real time according to setting and transmits the information to the singlechip main control module, a first receiving end of the singlechip main control module is connected with a transmitting end of the first RS-485 receiving module, a second receiving end of the singlechip main control module is connected with a transmitting end of the second RS-485 receiving module, the sending end of the single-chip microcomputer main control module is connected with the receiving end of the RS-485 sending module, the first sending end of the RS-485 sending module is connected with the receiving end of the first RS-485 receiving module in the adjacent upper-stage acquisition transmission node through a first RS-485 twisted pair, and the second sending end of the RS-485 sending module is connected with the receiving end of the second RS-485 receiving module in the upward second-stage acquisition transmission node at one stage interval through a second RS-485 twisted pair.
2. The RS-485-based ocean sensor array data transmission bus according to claim 1, wherein the single chip microcomputer master control module in the current stage of the collection transmission node receives data transmitted by the RS-485 transmitting module in the next stage of the collection transmission node through the first RS-485 receiving module when detecting that the connection state of the first RS-485 twisted pair is normal, receives data transmitted by the RS-485 transmitting module in the next stage of the collection transmission node through the second RS-485 receiving module when detecting that the connection state of the first RS-485 twisted pair is abnormal, and transmits all the received data to the first RS-485 receiving module in the previous stage of the collection transmission node through the RS-485 transmitting module, meanwhile, the single-chip microcomputer main control module in the acquisition transmission node of the current stage sends all received data to the second RS-485 receiving module in the acquisition transmission node of the upward second stage at one stage interval through the RS-485 sending module.
3. The RS-485-based marine sensor array data transmission bus as claimed in claim 1 or 2, wherein the single chip microcomputer main control module adopts an STM32 single chip microcomputer.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112882978A (en) * | 2021-03-02 | 2021-06-01 | 中慧通(江苏)电子科技有限公司 | Serial data transmission device and method and data processing equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112882978A (en) * | 2021-03-02 | 2021-06-01 | 中慧通(江苏)电子科技有限公司 | Serial data transmission device and method and data processing equipment |
| CN112882978B (en) * | 2021-03-02 | 2023-09-15 | 北京伟兴彦科技有限公司 | Serial data transmission device, method and data processing equipment |
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