CN101510859B

CN101510859B - Coupler capable of switching bus

Info

Publication number: CN101510859B
Application number: CN2009101024765A
Authority: CN
Inventors: 黄浩; 李凌志
Original assignee: Guizhou Space Appliance Co Ltd
Current assignee: Guizhou Space Appliance Co Ltd
Priority date: 2009-03-20
Filing date: 2009-03-20
Publication date: 2011-08-10
Anticipated expiration: 2029-03-20
Also published as: CN101510859A

Abstract

The invention discloses a coupler which can carry out bus switch; the coupler comprises a switch structure and a coupling structure, wherein the switch structure consists of a switch control port, two transfer relays and a terminal resistor; the input ends of the two transfer relays are connected with the switch control ports; the terminal resistor is connected between normally open contacts; normally closed contacts are connected with the first bus ports; the coupling structure consists of a coupling transformer and an insulation resistor; one end of the coupling transformer is connected with a sub-bus port, while the other end thereof is connected with the insulation resistor; meanwhile, the common terminal connect of the two transfer relays of the switch structure is connected with the otherend of the insulation resistor and then connected with the second bus port. The coupler can reduce the wiring of the bus system and the varieties and quantities of couplers in the system and facilitate the on-line default inspection.

Description

A kind of coupler that carries out the bus switching

Technical field

The present invention relates to a kind of data bus coupler, in particular, relate to a kind of 1553B of possessing bus transfer function and can carry out the coupler that bus is switched.

Background technology

Present bus coupler sorting technique both domestic and external is a lot, can be divided into direct coupling system and indirect coupling mode according to the difference of coupled modes; Difference according to sub-line structure can be divided into list line structure and how sub-line structure; Difference according to terminal mode can be the endless structure substantially, a terminal structure is arranged and two terminal structures is arranged.

Because bus termination need be equipped with relevant terminal resistance, do not need terminal resistance in the line structure and prop up in bus, so in bus structures, need the coupler of several different structures, perhaps need the termination coupler in the coupler terminal, come very big inconvenience for the bus group guipure.

Summary of the invention

The present invention seeks to shortcoming, a kind of coupler that can realize that bus is switched is provided at the ordinary coupler networking.

The coupler that carries out bus switch of the present invention comprises switching construction and coupling mechanism, wherein switching mechanism is made up of switching controls port, two switching relaies, terminal resistance, two switching relay power inputs connect the switching controls port, connect terminal resistance between the normally opened contact, normally-closed contact connects first bus port; Coupling mechanism is made up of coupling transformer, isolation resistance, and coupling transformer one end is connected to sub-line cap, and the other end connects isolation resistance, and two switching relay common port contacts of switching mechanism connect second bus port after connecting the isolation resistance other end simultaneously.

Coupling mechanism is responsible for that mainly bus signals is coupled to sub-line, sub-line signal and is coupled to bus and is coupled to another way line then through being coupled to bus and sub-line signal; Switching mechanism mainly is responsible for the switching of bus, promptly at the band bus termination and be not with between two kinds of situations of bus termination and switch.

Advantage of the present invention:

1, reduced the wiring of 1553 bus systems, each coupler can be expanded a plurality of sub-lines;

2, reduce the kind and the quantity of coupler, can be to whole bus system networking, and do not need to add in addition terminal organ;

3, use single control signal just can realize the switching of bus,, conveniently carry out online fault detect when signal occurs utilizing control signal can distinguish the failure judgement source when unusual.

Description of drawings

Fig. 1 is an embodiment of the invention circuit structure diagram;

Fig. 2 is for using bus topolopy schematic diagram of the present invention;

Among the figure: 1-switching controls port, 2-two switching relaies, 3-line cap, 4-coupling transformer, 5-isolation resistance, 6-second bus port, 7-screen, 8-relay switch, 9-terminal resistance, 10-first bus port, A, B-normally opened contact, C, D-normally-closed contact, E, F-common port contact, 11-network main line, 12-can carry out the coupler that bus is switched.

Embodiment

The invention will be further described below in conjunction with accompanying drawing:

As shown in Figure 1, the coupler 12 that carries out the bus switching shown in the present, comprise switching construction and coupling mechanism, wherein switching mechanism is made up of switching controls port one, two switching relaies 2, terminal resistance 9, two switching relaies, 2 power inputs connect the switching controls port one, connect terminal resistance 9 between normally opened contact A, the B, normally-closed contact C, D connect first bus port 10; Coupling mechanism is made up of coupling transformer 4, isolation resistance 5, coupling transformer 4 one ends are connected to sub-line cap 3, the other end connects isolation resistance 5, and two switching relay common port contact E, the F of switching mechanism connect second bus port 6 after connecting isolation resistance 5 other ends simultaneously.

Describedly carry out coupler that bus switches except control port 1, sub-line cap 3 and first and second bus ports 10,6 are drawn by lead, other parts are that switching relay 2, terminal resistance 9, coupling transformer 4, isolation resistance 5 all are welded in the printed board.The screen of lead and the ground of printed circuit board weld together.

During use, when the switching controls port one does not have the pumping signal generation, relay 2 attonitys, relay switch 8 keeps initial condition, be E contact and C contact and the F contact and the maintenance connection of D contact of relay, and E and A, F and B keep disconnecting, and bus switch uses as the coupler of no bus termination; When the switching controls port one has pumping signal to produce, relay 2 actions, relay switch 8 actions, the E of relay and C contact and F and D contact disconnect, and E is connected with B with A, F, bus switch uses as the coupler that bus termination is arranged;

Figure 2 shows that bus switching topological structure, promptly connect the bus network that a plurality of couplers 12 that carry out the bus switching of the present invention constitute.11 is the network main line among the figure.When control port 1 did not have input, bus switch was not the coupler use as tape terminal resistance, and when control port 1 had input, bus switch used as the coupler of tape terminal resistance.Each sub-line 3 can be respectively as bus signal control end (single bus network has only a control end) or bus signals terminal (can be a plurality of), and bus signals transmits by bus master network 11.

Claims

1. one kind can be carried out the coupler that bus is switched, and this coupler switching mode is: when the switching controls port does not have the pumping signal generation, and the relay attonity in the coupler, relay switch keeps initial condition, as the coupler use of no bus termination; When the switching controls port has pumping signal to produce, its actuating of relay, relay switch switches, the coupler that promptly can be used as bus termination uses, it is characterized in that: this coupler comprises switching mechanism and coupling mechanism, wherein switching mechanism is made up of switching controls port (1), two switching relaies (2), terminal resistance (9), two switching relaies (2) power input connects switching controls port (1), connect terminal resistance (9) between the normally opened contact (A, B), normally-closed contact (C, D) connects first bus port (10); Coupling mechanism is made up of coupling transformer (4), isolation resistance (5), coupling transformer (4) one ends are connected to sub-line cap (3), the other end connects isolation resistance (5), and two switching relay common port contacts (E, F) of switching mechanism connect second bus port (6) after connecting isolation resistance (5) other end simultaneously.

2. can carry out the coupler that bus is switched according to claim 1, it is characterized in that: described control port (1), sub-line cap (3), first and second bus ports (10,6) are drawn by the sealing wire in the printed board during electrical connection, switching relay (2), terminal resistance (9), coupling transformer (4), isolation resistance (5) all are welded on the printed circuit board, the welding of the ground of conductor shielding layer and printed circuit board.