CN-122027482-A - Bidirectional ring topology network data acquisition and transmission system

CN122027482ACN 122027482 ACN122027482 ACN 122027482ACN-122027482-A

Abstract

The invention provides a bidirectional ring topology network data acquisition and transmission system which adopts a bidirectional ring topology network architecture and can improve the reliability and fault tolerance of data transmission. The bidirectional ring topology network data acquisition and transmission system comprises a plurality of data acquisition modules, a signal processor and a bidirectional ring topology network, wherein the data acquisition modules are in one-to-one correspondence with signal output channels of controlled objects, acquire analog signals output by the corresponding signal output channels of the controlled objects, finish analog signal A/D conversion and packaging, the data acquisition modules are used for transmitting data to the signal processor after integrating the data through the bidirectional ring topology network, the bidirectional ring topology network comprises a plurality of aggregation transmission modules, the aggregation transmission modules are connected with the signal processor into a ring structure, and each aggregation transmission module is connected into the ring network structure through double ports in a clockwise and anticlockwise mode, so that a bidirectional ring topology network structure is formed.

Inventors

SHI XIN
SHE LIHUANG
PANG RAN
Mao Ahong
JIANG YIN
WANG JIANHUA
ZHONG JINGJING
ZHANG ZONGKE
LI JUNDUO

Assignees

中船辽海装备有限责任公司

Dates

Publication Date: 20260512
Application Date: 20251231

Claims (8)

1. The bidirectional ring topology network data acquisition and transmission system is characterized by comprising a plurality of data acquisition modules, a signal processor and a bidirectional ring topology network; The data acquisition modules are in one-to-one correspondence with the signal output channels of the controlled object, acquire analog signals output by the signal output channels corresponding to the controlled object, and finish A/D conversion and packaging of the analog signals; The data acquisition module is used for transmitting the data to the signal processor after integrating the data through the bidirectional ring topology network; The bidirectional ring topology network comprises a plurality of convergence transmission modules, wherein the convergence transmission modules are connected with the signal processor into a ring structure, and each convergence transmission module is respectively connected into the ring network structure clockwise and anticlockwise through double ports, so that a bidirectional ring topology network architecture is formed.
2. The bidirectional ring topology network data acquisition and transmission system of claim 1, wherein when said convergence transmission module transmits data to said signal processor, the data is duplicated in two and transmitted from both ports thereof to the signal processor in both clockwise and counterclockwise directions, respectively.
3. The system of claim 2, wherein the input end of each aggregation transmission module is capable of completing aggregation transmission of digital signals output by all data acquisition modules, and the digital signals output by all data acquisition modules are sent to one or more aggregation transmission modules in the bidirectional ring topology network during data transmission.
4. A bi-directional ring topology network data acquisition and transmission system as recited in claim 2 or 3, wherein data is transmitted in messages in said bi-directional ring topology network; The signal processor judges according to the time stamp, ID and type of the received message, and automatically selects message data according to preset rules.
5. The bidirectional ring topology network data acquisition and transmission system of claim 1 or 2, wherein data is transmitted using a dual gigabit ethernet in the bidirectional ring topology network.
6. The bidirectional ring topology network data acquisition and transmission system according to claim 1 or 2, wherein IP addresses are dynamically allocated in the bidirectional ring topology network, and an odd IP is used for a clockwise ring and an even IP is used for a counterclockwise ring.
7. The bidirectional ring topology network data acquisition and transmission system according to claim 1 or 2, wherein the data acquisition module comprises an AD acquisition unit and a signal conditioning unit, and the aggregation transmission module adopts an FPGA chip; The AD acquisition unit is used for completing signal acquisition and analog-to-digital conversion, the sampling rate is adjustable, daisy chain serial link is supported, and the signal conditioning unit adopts a program controlled gain amplifier to realize gain control and impedance matching of single-ended analog signals.
8. The bidirectional ring topology network data acquisition and transmission system of claim 7, wherein said data acquisition module comprises 16 AD acquisition units for acquiring 16 single-ended input signals at the front end; The 16 AD acquisition units are in a group of 4, and are connected with the FPGA chip in a serial link to form 4 daisy chain SPIs.

Description

Bidirectional ring topology network data acquisition and transmission system Technical Field The invention relates to a data acquisition and transmission system of multichannel underwater sound detection equipment, in particular to a bidirectional ring topology network data acquisition and transmission system, and belongs to the technical field of intelligent control of underwater sound detection equipment. Background In underwater sound detection equipment, a data acquisition and transmission system is a key component for realizing signal acquisition and processing. The traditional system mostly adopts a single bus or a simple network topology, and has the problems of poor data synchronism, low transmission reliability, weak anti-interference capability and the like. In particular, in an underwater complex environment, the conventional network transmission structure is easy to cause paralysis of the whole system when a node is in fault, and lacks of redundant design, so that the reliability is low, and the fault tolerance capability is poor. Disclosure of Invention In view of the above, the invention provides a bidirectional ring topology network data acquisition and transmission system which is suitable for high-precision synchronous acquisition, data processing and reliable transmission of multichannel analog signals, and can improve the reliability and fault tolerance of data transmission by adopting a bidirectional ring topology network architecture. The bidirectional ring topology network data acquisition and transmission system comprises a plurality of data acquisition modules, a signal processor and a bidirectional ring topology network; The data acquisition modules are in one-to-one correspondence with the signal output channels of the controlled object, acquire analog signals output by the signal output channels corresponding to the controlled object, and finish A/D conversion and packaging of the analog signals; The data acquisition module is used for transmitting the data to the signal processor after integrating the data through the bidirectional ring topology network; The bidirectional ring topology network comprises a plurality of convergence transmission modules, wherein the convergence transmission modules are connected with the signal processor into a ring structure, and each convergence transmission module is respectively connected into the ring network structure clockwise and anticlockwise through double ports, so that a bidirectional ring topology network architecture is formed. As a preferred mode of the present invention, when the convergence transmission module transmits data to the signal processor, the data is duplicated into two parts, and the two parts are transmitted to the signal processor in clockwise and anticlockwise directions respectively. In the invention, the input end of each convergence transmission module can finish the convergence transmission of the digital signals output by all the data acquisition modules, and the digital signals output by all the data acquisition modules are sent to one or more convergence transmission modules in the bidirectional ring topology network during data transmission. As a preferred mode of the invention, data is transmitted in the form of messages in the bidirectional ring topology network; The signal processor judges according to the time stamp, ID and type of the received message, and automatically selects message data according to preset rules. As a preferred mode of the present invention, in the bidirectional ring topology network, data is transmitted by using a dual-end gigabit ethernet. As a preferred mode of the present invention, in the bidirectional ring topology network, IP addresses are dynamically allocated, and an odd IP is used for a clockwise ring and an even IP is used for a counterclockwise ring. The data acquisition module comprises an AD acquisition unit and a signal conditioning unit, wherein the convergence transmission module adopts an FPGA chip; The AD acquisition unit is used for completing signal acquisition and analog-to-digital conversion, the sampling rate is adjustable, daisy chain serial link is supported, and the signal conditioning unit adopts a program controlled gain amplifier to realize gain control and impedance matching of single-ended analog signals. As a preferred mode of the invention, the data acquisition module comprises 16 AD acquisition units, and acquires 16 paths of single-end input signals at the front end; The 16 AD acquisition units are in a group of 4, and are connected with the FPGA chip in a serial link to form 4 daisy chain SPIs. The beneficial effects are that: (1) The data transmission system has high reliability, adopts a bidirectional ring topology network architecture, allows data to be transmitted in two directions, can realize data redundancy transmission, has high reliability and good fault tolerance, and solves the reliability problem caused by single-point faults of the tra