CN200944578Y

CN200944578Y - Bus relay

Info

Publication number: CN200944578Y
Application number: CNU2006200354897U
Authority: CN
Inventors: 唐侃; 林军; 彭世益; 周砚; 刘文武
Original assignee: GUILIN SPACEFLIGHT ELECTRONIC CO Ltd
Current assignee: GUILIN SPACEFLIGHT ELECTRONIC CO Ltd
Priority date: 2006-09-01
Filing date: 2006-09-01
Publication date: 2007-09-05
Anticipated expiration: 2016-09-01

Abstract

The bus relay comprises a power supply circuit, a single chip processor control circuit, an isolating drive circuit with a field effect transistor, and a bus communication interface connected with the single chip processor, the bus communication interface is RS485 or CAN bus communication interface, and the relay is connected with a central control circuit via the bus. And the testing circuit is provided to send the load voltage and current testing result into the single chip, the real-time monitoring. When the load is shortened or the current is overloaded, the single chip processor controls through the overload current protection curve to cut the load and prevent the damage of parts. The overload current protection value can be arranged according to the requirement. Each reply is provided with a unique address. When the control command or enquiry command corresponding with the address is received, the single chip processor can response immediately, and control the switching of load according to the control command, or render the running state to the upper control system. The relay uses the bus to couple to reduce the wire weight of the distribution system, thereby being convenient for fulfilling the distributive installment; the relay is convenient for adjusting and maintaining, improving the reliability and testability of system, and providing with the function of data recording.

Description

Bus relay

(1) technical field

The utility model relates to the relay field, is specially a kind of solid-state bus relay.

(2) technical background

Solid-state relay is a kind of contactless break-make electronic switch, and it utilizes the switching characteristic of electronic component (as semiconductor device such as switch triode, bidirectional triode thyristor, field effect transistor), can reach the purpose of contactless no-spark ground make-and-break contact.Existing relay mostly is four end active devices greatly, and two terminals are the input control end, and two ends are output-controlled end in addition.Come the break-make of load that the control output end connects by the connecting and disconnecting of control end signal.This pattern requires the control signal lead-out wire of each relay to be independence, than being more suitable for central controlled occasion.When many group load Distribution are arranged in the system in the different location, each load will link to each other with control centre by electric wire respectively, and whole system needs a large amount of electric wires, makes installation, debugging, the maintenance work of system lengthy and tedious, also reduce the reliability of system, increased cost.In addition, also be difficult to system running state is monitored in real time.

Existing relay is not suitable for the complicated day by day huge system with a large amount of distributed terminators.

(3) utility model content

The purpose of this utility model is a kind of bus relay of design, and a plurality of these type of relays can be connected with control centre by bus, and the single-chip microcomputer of each relay is accepted control centre by the address and moved for the instruction of this relay.

The bus relay of the utility model design comprises power-supplying circuit, single chip machine controlling circuit, the isolated drive circuit of field effect transistor is arranged, power-supplying circuit is the voltage-regulation voltage-stabilization circuit, it connects power supply and connects this relay interior single-chip microcomputer and isolated drive circuit, is its power supply.Isolated drive circuit is connected with load.The bus communication interface that is connected with single chip machine controlling circuit in addition.This relay is connected with governor circuit through bus by the bus communication interface.

This bus relay also has testing circuit, and it is connected with load end, and testing circuit inserts single chip machine controlling circuit.Detect the voltage and current of load end, testing result is sent into single-chip microcomputer.Single-chip microcomputer is monitored actual break-make situation in real time, and transmits this relay running status through the bus level controlling system that makes progress.When load short circuits or current overload, single-chip microcomputer is controlled by the overload current of its storage protection curve, sends signal, and disconnecting consumers prevents to transship the overheated device failure that causes, and improves the reliability of system.Overload current protection value can be set in the permitted maximum range as required, determines operate time of protection according to the overload magnification that electric current is compared with set overload current protection value.

Each this bus relay that is articulated on the bus all has unique address.The single-chip microcomputer of each bus relay is stored the address of this relay, when last level controlling system from the bus forward data, single-chip microcomputer is according to the address information screening identification of data, when receiving with instruction of this relay address control corresponding or query statement, make an immediate response, send signal according to control command, field effect transistor is turned on and off, thereby isolated drive circuit control turns on and off load, according to query statement, upwards level controlling system is reported the current running status of this relay, the actual break-make situation of load and whether overload short circuit, current overload is taken place.

The advantage of the utility model bus relay is: 1, be applicable to the multiple standards bus, can articulate as the RS485 bus and to be no less than 128 relays, the CAN bus can articulate nearly 110 relays, owing to use bus to articulate, significantly reduced the cable length of distribution system, mitigation system weight is saved the space, is convenient to realize distributed installation; Be convenient to debugging maintenance, improved the reliability of system; 2, each the relay address on the bus can online as required setting, and last level controlling system sends the break-make that each relay can be in time controlled in instruction; 3, this bus relay has overload protection function, and overload current protection value can accurately be set in specified protection value, satisfies the needs of different application occasion; 4, this bus relay has self-checking function, can monitor in real time the actual break-make of connecing load, and the level controlling system report that can regularly make progress, last level controlling system also can be inquired about at any time, satisfy the requirement of system's power-on self-test and cycle self check, promoted the testability of system; 5, also has the operating state data writing function, in this bus relay course of work, when load short circuits or current overload occurring, the automatic recorded and stored of single-chip microcomputer, and being sent to level controlling system, data can not lost yet during outage, are convenient to system maintenance and data gather.

(4) description of drawings

Fig. 1 is this bus relay embodiment theory structure block diagram;

Fig. 2 is this bus relay embodiment circuit diagram;

This bus relay of Fig. 3 embodiment assembly structure schematic diagram.

(5) embodiment

This bus relay embodiment as shown in Figure 1, comprise power-supplying circuit 2, single chip machine controlling circuit 3, the isolated drive circuit 6 of field effect transistor is arranged, power-supplying circuit 2 is the voltage-regulation voltage-stabilization circuit, and it connects power supply and connects this relay interior single-chip microcomputer and isolated drive circuit 6, is its power supply.Isolated drive circuit 6 is connected with load 7.The bus communication interface 5 that is connected with single chip machine controlling circuit 3 in addition, testing circuit 1 is connected with load end, and inserts single chip machine controlling circuit 3.This relay is connected with governor circuit through bus 4 by bus communication interface 5.

Described bus communication interface 5 is RS485 bus communication interface or CAN bus communication interface, is respectively applied for to articulate RS485 bus or CAN bus.

As required, the single chip machine controlling circuit 3 of this relay is single-chip microcomputer and peripheral circuit thereof, can connect 1～8 independently isolated drive circuit 6, connects 1～8 load 7, and the field effect transistor 6-1 in each isolated drive circuit 6 selects for use according to connecing load.Each field effect transistor 6-1 respectively has the subaddressing to accept single-chip microcomputer by its subaddressing to instruct independent break-make.Supporting with it 1～8 testing circuit 1 that is connected with each load end in addition inserts single-chip microcomputer.

As shown in Figure 2, described isolated drive circuit 6 comprises drive circuit and the magnet ring 6-2 that drives field effect transistor 6-1, and the high-frequency oscillating circuits of single chip machine controlling circuit 3 is connected with magnet ring 6-2 master limit, and the drive circuit of field effect transistor 6-1 then is connected with the secondary of magnet ring 6-2.Realize the magnetic isolation by magnet ring 6-2 between drive circuit and the single chip machine controlling circuit 3.When single-chip microcomputer receives when going code by bus 4, start the high-frequency oscillating circuits in the single chip machine controlling circuit 3, energy is coupled to the drive circuit of the field effect transistor 6-1 that is connected on magnet ring 6-2 secondary by magnet ring 6-2, drive circuit adds to field effect transistor 6-1 grid with driving voltage and makes it conducting, and load 7 is connected; When receiving by bus 4, single-chip microcomputer turn-offs instruction or self check when obtaining load current and surpassing the protection value of setting; the high-frequency oscillating circuits failure of oscillation; the drive circuit of field effect transistor 6-1 discharges by accelerating circuit; the discharge of field effect transistor 6-1 grid, voltage descend; field effect transistor 6-1 ends, and load 7 disconnects.

Testing circuit 1 is the Hall current sensor 1-1 that load end connect, the electric current of load 7 of flowing through detects by Hall current sensor 1-1, the magnetic field that load current produces when flowing through Hall current sensor 1-1 transfers voltage signal to, import single-chip microcomputer into, single-chip microcomputer carries out digital-to-analogue conversion and obtains corresponding load current digital signal, in real time the monitoring load electric current.Field effect pipe 6-1 turn-offs during no-load current, judges the actual on off operating mode of this relay thus.Simultaneously; single-chip microcomputer carries out the current overload integral operation according to current sample; by the overload protection curve that can set, judge whether load current transships, when load short circuits or current overload occurring; the multiple that surpasses the protection value of setting according to the load current that is detected; press overload current protection curve single chip machine controlling circuit and in time high-frequency oscillating circuits is sent the failure of oscillation signal, by field effect transistor 6-1, disconnecting consumers 7; protect the data of single-chip microcomputer record storage operational data and current overload.When receiving the query statement of level controlling system, single-chip microcomputer passes through bus 4 with data upload.

This bus relay embodiment practical set structure as shown in Figure 3, the power-supplying circuit 2 of this relay, single chip machine controlling circuit 3, isolated drive circuit 6, testing circuit 1 and bus communication interface 5, all design and installation is in printed circuit board II, printed circuit board II is installed in the shell I of this relay, many grafting pins are arranged on the base III, connect the input of the power-supplying circuit 2 on the printed circuit board II, the input of isolated drive circuit 6, the terminals of bus communication interface 5 respectively.Be encapsulated in this bus relay in the shell I, be convenient to user installation and use, also protected each circuit.

Claims

1 one kinds of bus relays, comprise power-supplying circuit, single chip machine controlling circuit, the isolated drive circuit of field effect transistor is arranged, power-supplying circuit is the voltage-regulation voltage-stabilization circuit, it connects power supply and connects single-chip microcomputer in this relay, and isolated drive circuit, isolated drive circuit is connected with load, it is characterized in that:

The bus communication interface (5) that is connected with single chip machine controlling circuit (3) in addition, this bus relay is connected with governor circuit through bus (4) by bus communication interface (5).

2 bus relays according to claim 1 is characterized in that:

Described bus communication interface (5) is RS485 bus communication interface or CAN bus communication interface, is respectively applied for to articulate RS485 bus or CAN bus.

3 bus relays according to claim 1 and 2 is characterized in that:

The testing circuit (1) that is connected with load end in addition, testing circuit (1) inserts single chip machine controlling circuit (3).

4 bus relays according to claim 3 is characterized in that:

Each this bus relay that is articulated on the bus (4) all has unique address; The single-chip microcomputer of each bus relay is stored the address of this relay.

5 bus relays according to claim 3 is characterized in that:

Described isolated drive circuit (6) comprises drive circuit and the magnet ring (6-2) that drives field effect transistor (6-1), the high-frequency oscillating circuits of single chip machine controlling circuit (3) is connected with the main limit of magnet ring (6-2), and the drive circuit of field effect transistor (6-1) then is connected with the secondary of magnet ring (6-2).

6 bus relays according to claim 3 is characterized in that:

Described testing circuit (1) is the Hall current sensor (1-1) that load end connect.

7 bus relays according to claim 1 and 2 is characterized in that:

The single chip machine controlling circuit of this relay (3) connects 1～8 independently field effect transistor isolated drive circuit (6), connects 1～8 load (7), and each field effect transistor (6-1) respectively has the subaddressing to accept single-chip microcomputer by its subaddressing to instruct independent break-make; Supporting with it 1～8 testing circuit that is connected with each load end (1) in addition inserts single chip machine controlling circuit (3).

8 bus relays according to claim 1 and 2 is characterized in that:

The power-supplying circuit of this relay (2), single chip machine controlling circuit (3), isolated drive circuit (6), testing circuit (1) and bus communication interface (5), all be installed on printed circuit board (II), printed circuit board (II) is installed in the shell (I) of this relay, many grafting pins are arranged on the base (III), connect the input of the power-supplying circuit (2) on the printed circuit board (II), the input of isolated drive circuit (6), the terminals of bus communication interface (5) respectively.