CN211089664U

CN211089664U - Novel NMEA2000 communication system transceiver module

Info

Publication number: CN211089664U
Application number: CN202020081644.9U
Authority: CN
Inventors: 肖功凡; 安阳
Original assignee: Shenzhen Zkhx Science & Technology Co ltd
Current assignee: Shenzhen Zkhx Science & Technology Co ltd
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-07-24
Anticipated expiration: 2030-01-14

Abstract

The utility model provides a novel NMEA2000 communication system transceiver module, its characteristic includes CPU (1), CAN state machine (2) constitution, CPU (1) forms signal intercommunication through the SPI bus and CAN state machine (2) and is connected, CAN state machine (2) link to each other with signal isolation system (4) through two-way data wire, signal isolation system (4) link to each other with NMEA2000 drive (5) through two-way data wire, NMEA2000 drive (5) link to each other with NMEA2000 gateway power (7) through the wire, the utility model discloses improve the innovation to not enough or defect that prior art exists, designed a novel NMEA2000 communication system transceiver module who has functional integrity, low-power consumption, low cost, small in size.

Description

Novel NMEA2000 communication system transceiver module

Technical Field

The utility model belongs to the technical field of navigation NMEA2000 communication system transceiver module, through the data information sharing interconnection of NMEA2000 gateway with equipment on boats and ships, concretely relates to novel NMEA2000 communication system transceiver module.

Background

With the continuous development of fishery and ship industry, the number of devices on ships is continuously increased, the functions of the devices are also continuously increased, the data information sharing and interconnection between the devices are more and more important, the NMEA2000 communication transceiving standard solves the problems that the devices on the ships are mutually communicated, whether the communication is available or not, the resources are shared, the devices are simple, and the resources are efficient. The NMEA2000 communication system is based on a CAN bus protocol stack, all data communication formats are received and sent according to a CAN protocol, and a unique NMEA2000 hardware interface is added for development. Meanwhile, the NMEA2000 solution on the market is not complete and consists of a plurality of functional components, the CAN protocol stack part of the NMEA2000 communication system on the market at present is generally processed by adopting a single MCU, and the NMEA2000 driving and isolating function is added. The system optimization can not be achieved on the premise of meeting all functions of NMEA2000, and the system is low in cost, reliable in performance, resource-saving and simple in space.

In order to overcome the technical defects, the applicant considers that the research of a novel NMEA2000 communication system transceiver module has necessary practical significance.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is not enough to current technique, provides a novel NMEA2000 communication system transceiver module that has functional integrity, low-power consumption, low cost, small in size.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a novel NMEA2000 communication system transceiver module, its characterized in that includes CPU (1), CAN state machine (2) and constitutes, CPU (1) forms signal intercommunication connection through SPI bus and CAN state machine (2).

Preferably, the CAN state machine (2) is connected with the signal isolation system (4) through two bidirectional data conductors, the signal isolation system (4) is connected with the NMEA2000 driver (5) through two bidirectional data conductors, and the NMEA2000 driver (5) is connected with the NMEA2000 gateway power supply (7) through a conductor.

Preferably, the NMEA2000 driver (5) is in signal interconnection with the NMEA2000 gateway (6) via differential signal data lines.

Preferably, a silent control (3) is connected between the CPU (1) and the signal isolation system (4) through a lead, and the silent control (3) and the CAN state machine (2) form a parallel structure.

Preferably, the CAN state machine (2) is connected with the local power supply (8) through a power line.

Compared with the prior art, the utility model provides a novel NMEA2000 communication system transceiver module possesses following beneficial effect:

the utility model designs a novel NMEA2000 communication system transceiver module with functional integrity, low power consumption, low cost and small volume aiming at the defects of the prior art; the utility model takes CPU, CAN state machine, isolation system, NMEA2000 drive, NMEA2000 gateway as core, and forms the sending path and receiving path of signal, the utility model adopts chip for signal instruction data error control coding and decoding part, and only simple command operation is needed, so that the complex processing process is simplified; the utility model discloses to prior art's defect, the chip is adopted in the isolated system and the NMEA2000 drive that use integrated circuit design, reduces electromagnetic radiation interference, and circuit structure is simple, has strengthened system reliability.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description, do not constitute a limitation of the invention, in which:

fig. 1 is the schematic diagram of the transceiver module structure of the NMEA2000 communication system according to the present invention.

Fig. 2 is a schematic diagram of input and output of control signals of the CPU (1).

Fig. 3 is a schematic structural diagram of a signal input/output module of the CAN state machine (2).

Fig. 4 is a schematic structural diagram of the signal isolation system (4).

Fig. 5 is a schematic diagram of the NMEA2000 drive (5).

In the figure: the system comprises a CPU (1), a CAN state machine (2), a silent control (3), a signal isolation system (4), an NMEA2000 driver (5), an NMEA2000 gateway (6), an NMEA2000 gateway power supply (7) and a local power supply (8).

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-5, the present invention provides a technical solution:

the utility model provides a novel NMEA2000 communication system transceiver module, its characterized in that includes CPU (1), CAN state machine (2) constitution, CPU1 forms the signal intercommunication with CAN state machine 2 through the SPI bus and is connected.

The utility model discloses, preferred embodiment, CAN state machine 2 links to each other with signal isolation system 4 through two-way data wire, signal isolation system 4 links to each other with NMEA2000 drive 5 through two-way data wire, NMEA2000 drive 5 passes through the wire and links to each other with NMEA2000 gateway power 7.

The utility model discloses, preferred embodiment, NMEA2000 drive 5 forms the signal intercommunication with NMEA2000 gateway 6 through the difference signal data line and is connected.

The utility model discloses, preferred embodiment, be connected with silence control 3 through the wire between CPU1 and the signal isolation system 4, silence control 3 constitutes parallel structure with CAN state machine 2.

In the preferred embodiment, the CAN state machine 2 is connected to the local power supply 8 via a power line.

The utility model discloses a theory of operation and use flow are as follows:

signal transmission path: the CPU1 sends out control signals and data, the control signals and data are sent to the CAN state machine 2 through an SPI bus, the CAN state machine 2 carries out error coding processing, the control signals are sent to a signal isolation system 4 to be isolated to avoid signal crosstalk between devices, then the control signals are driven 5 through the NMEA2000 to generate differential signals to be connected to the NMEA2000 gateway 6, the differential signals are interconnected with other devices through the NMEA2000 gateway 6, and the data and instructions of the local computer are sent out.

Signal reception path: the NMEA2000 gateway 6 receives the differential signal, reduces the differential signal into a data signal through the NMEA2000 drive 5, isolates crosstalk through the signal isolation system 4, then decodes and reduces the data through an error of the CAN state machine 3, transmits the data to the CPU1 through the SPI bus, and sends out a corresponding command through the CPU1 for data sharing among the devices.

In the local silent state 3, a CPU1 sends out a silent signal, and the silent signal passes through a signal isolation system 4 to an NMEA2000 drive 5 module, so that communication interconnection between devices is not accepted.

The CPU1 sends data and commands to be sent to the CAN state machine 2 through the SPI bus, and data information returned from the devices is sent back to the CPU1 through the SPI bus.

The CAN state machine 2 handles complex error encoding and error decoding, ensuring data accuracy.

The signal isolation system 4 completes the signal isolation between the local signal and the equipment, thereby greatly reducing the signal crosstalk between the equipment and ensuring the reliable operation of the equipment.

The NMEA2000 drives the 5 parts, and the sent data are made into differential pair signals, so that the correctness of the transmitted data is greatly improved, and the error rate is reduced.

The local machine, the NMEA2000 driver 5 and the NMEA2000 gateway 6 both use two independent power systems of an independent local power supply 8 and an independent NMEA2000 gateway power supply 7, so that high-frequency signals are prevented from being radiated out through power supply lines, and EMI is reduced.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel NMEA2000 communication system transceiver module, its characterized in that includes CPU (1), CAN state machine (2) and constitutes, CPU (1) forms signal intercommunication through the SPI bus and CAN state machine (2) and is connected, CAN state machine (2) link to each other with signal isolation system (4) through two-way data wire, signal isolation system (4) link to each other with NMEA2000 drive (5) through two-way data wire, NMEA2000 drive (5) link to each other with NMEA2000 gateway power (7) through the wire.

2. The novel NMEA2000 communication system transceiver module as set forth in claim 1, wherein: the NMEA2000 driver (5) is in signal intercommunication connection with the NMEA2000 gateway (6) through a differential signal data line.

3. The novel NMEA2000 communication system transceiver module as set forth in claim 1, wherein: a silent control (3) is connected between the CPU (1) and the signal isolation system (4) through a lead, and the silent control (3) and the CAN state machine (2) form a parallel structure.

4. The novel NMEA2000 communication system transceiver module as set forth in claim 1, wherein: the CAN state machine (2) is connected with a local power supply (8) through a power line.