CN204821420U

CN204821420U - LIN node system based on LIN bus can automatic refresh address

Info

Publication number: CN204821420U
Application number: CN201520566166.XU
Authority: CN
Inventors: 张立; 任康成; 姚肖勇
Original assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Current assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Priority date: 2015-07-30
Filing date: 2015-07-30
Publication date: 2015-12-02
Anticipated expiration: 2025-07-30

Abstract

The utility model relates to a LIN node system based on LIN bus can automatic refresh address, including a host node and a plurality of LIN child node, and the host node provides the power for each LIN child node, and the output of host node passes through the LIN signal line to be connected with the input of first LIN child node, and respectively adjacent LIN child node concatenates through the LIN signal line, and each LIN child node is transmitted LIN signal the past backward in proper order, be equipped with the switch circuit who is used for each selfcorresponding LIN child node LIN incoming signal of control and LIN output signal break -make in each LIN child node, each the LIN child node when refreshing the address is controlled respective switch circuit in the past backward and is switched on from each LIN incoming signal and LIN output signal who corresponds. The utility model discloses simple structure can effectively solve the problem that the child node loaded in mixture.

Description

Based on the LIN node system of the automatic refresh address of LIN bus energy

Technical field

The utility model relates to a kind of LIN node system based on the automatic refresh address of LIN bus energy, belongs to car light LIN bus control system technical field.

Background technology

Controller with bus in current automobile gets more and more, and function becomes increasingly complex, the master controller be connected with vehicle body CAN (ControllerAreaNetwork) bus with sub-controller quantity also get more and more.Usually be connected by LIN bus between master controller with sub-controller.The general all comparing class of function of sub-controller seemingly, therefore be all the same on hardware, it is distinguished and often software writes different addresses for each child node, therefore more difficultly the child node of diverse location in system is distinguished, easily child node is loaded in mixture, cause systemic-function mistake.

At present, distinguishing the method one of child node is by manually identifying, and another kind is that child node is made different shapes to distinguish, but these all can increase cost, also easily make mistakes, the problem that cannot fundamentally solve child node and load in mixture.

Summary of the invention

It is simple that the purpose of this utility model is to provide a kind of structure, effectively can solve the LIN node system based on the automatic refresh address of LIN bus energy that child node loads in mixture.

The utility model is the technical scheme achieved the above object: a kind of LIN node system based on the automatic refresh address of LIN bus energy, comprise a major joint and multiple LIN child node, and major joint provides power supply to each LIN child node, it is characterized in that: the mouth of described major joint is connected with the input end of first LIN child node by LIN signal wire (SW), each adjacent LIN child node is connected in series by LIN signal wire (SW), and LIN signal transmits by each LIN child node from front to back successively; Be provided with the switch circuit for controlling respective corresponding LIN child node LIN incoming signal and LIN output signal break-make in described each LIN child node, each LIN child node during refresh address controls respective switch circuit conducting from front to back from the LIN incoming signal of each correspondence and LIN output signal.

Major joint is connected by LIN signal wire (SW) with each LIN child node by the utility model successively, and therefore LIN signal is transmitted from the major joint of master controller from front to back successively by each LIN child node.Owing to being provided with switch circuit in each LIN child node, therefore the break-make of corresponding LIN child node place LIN incoming signal and LIN output signal line is controlled by this switch circuit, when carrying out refresh address to each LIN child node, each LIN child node controls LIN incoming signal corresponding to respective switch circuit conducting and LIN output signal from front to back, automatically be the LIN node refresh address in system, therefore can ensure that each LIN child node is arranged on its ad-hoc location, the utility model structure is simple, easy, the problem that current LIN child node loads in mixture can be solved, be specially adapted in system, there is comparatively multinode, and more difficultly in appearance the node in system is distinguished to be assemblied in corresponding position.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.

Fig. 1 is the structural principle block diagram of the utility model based on the LIN node system of the automatic refresh address of LIN bus energy.

Fig. 2 is the structural representation of the utility model LIN child node.

Detailed description of the invention

See Fig. 1, shown in 2, LIN node system based on the automatic refresh address of LIN bus energy of the present utility model, comprise a major joint and multiple LIN child node, major joint and LIN child node are existing master controller and sub-controller, major joint provides power supply to each LIN child node, multiple LIN child node is connected on power and ground, the mouth of major joint is connected with the input end of first LIN child node by LIN signal wire (SW), and each adjacent LIN child node is connected in series by LIN signal wire (SW), LIN child node before and after being made by LIN signal wire (SW) is connected, LIN signal transmits by each LIN child node from front to back successively, namely LIN signal is transferred to first LIN child node by major joint by LIN signal wire (SW), second LIN child node is transferred to again by first LIN child node, the like, LIN signal is transmitted successively by each LIN child node from front to back.

See Fig. 1, shown in 2, the switch circuit for controlling respective corresponding LIN child node LIN incoming signal and LIN output signal break-make is provided with in the utility model each LIN child node, each LIN child node during refresh address controls respective switch circuit conducting from front to back from the LIN incoming signal of each correspondence and LIN output signal, namely when refresh address, LIN signal is transferred to first LIN child node by major joint, switch circuit now in second LIN child node turns off, because the LIN incoming signal at second LIN child node place and LIN output signal disconnect, the LIN signal be connected between first LIN child node with second LIN node is disconnected, the address of first LIN child node can be write, after the address of first LIN child node writes, switch circuit in second LIN child node is connected, namely the LIN signal wire (SW) between first LIN child node and second LIN child node is connected, and the switch circuit in the 3rd LIN child node turns off, the LIN incoming signal at the 3rd LIN child node place and LIN output signal are disconnected, close the LIN signal wire (SW) between second LIN child node and the 3rd LIN child node, now to second LIN child node writing address, the like, corresponding address is write to each LIN child node in system, the problem that current LIN child node loads in mixture can be solved.

As shown in Figure 2, the microprocessor arranged in the utility model LIN child node is connected with switch circuit and the break-make of master cock circuit, switch circuit of the present utility model is metal-oxide-semiconductor switch circuit, by power supply to the microprocessor power supply in LIN child node, the output pin of microprocessor is connected with switch circuit, when microprocessor exports high level, switch circuit conducting, makes the LIN incoming signal at LIN child node place be connected with LIN output signal; When microprocessor output low level, switch circuit disconnects, the LIN incoming signal at this LIN child node place is not connected with LIN output signal, microprocessor is used to carry out the conduction of the metal-oxide-semiconductor in master cock circuit by LIN child node, realize the logical section of corresponding LIN signal, convenient successively to each LIN child node refresh address.

Claims

1. the LIN node system based on the automatic refresh address of LIN bus energy, comprise a major joint and multiple LIN child node, and major joint provides power supply to each LIN child node, it is characterized in that: the mouth of described major joint is connected with the input end of first LIN child node by LIN signal wire (SW), each adjacent LIN child node is connected in series by LIN signal wire (SW), and LIN signal transmits by each LIN child node from front to back successively; Be provided with the switch circuit for controlling respective corresponding LIN child node LIN incoming signal and LIN output signal break-make in described each LIN child node, each LIN child node during refresh address controls respective switch circuit conducting from front to back from the LIN incoming signal of each correspondence and LIN output signal.

2. the LIN node system based on the automatic refresh address of LIN bus energy according to claim 1, it is characterized in that: the microprocessor arranged in described each LIN child node is connected with switch circuit and the break-make of master cock circuit, and described switch circuit is metal-oxide-semiconductor switch circuit.