CN206039207U

CN206039207U - Multiswitch circuit

Info

Publication number: CN206039207U
Application number: CN201620984901.3U
Authority: CN
Inventors: 陈天平
Original assignee: Gaobeidian Pioneer Precision Instrument Manufacturing Co Ltd
Current assignee: Baoding pioneer Precision Instrument Manufacturing Co., Ltd.
Priority date: 2016-08-30
Filing date: 2016-08-30
Publication date: 2017-03-22
Anticipated expiration: 2026-08-30

Abstract

The utility model discloses a multiswitch circuit, including signaling conversion circuit, single chip circuit, decoder circuit, reversal processing circuit and channel switching circuit, signaling conversion circuit's output port connects the input port of single chip circuit, and the output port of single chip circuit connects the input port of decoder circuit, and the output port of decoder circuit connects the output port interface channel switching circuit of the input port of reversal processing circuit, reversal processing circuit. The utility model discloses low in production cost, it is simple to use, be fit for promoting.

Description

Multi-channel switch circuit

Technical field

This utility model is related to serial ports of computers information controlling transmission technology, specially a kind of multy-way switching of serial ports of computers On-off circuit.

Background technology

The serial communication of single-chip microcomputer is a kind of communication mode for being widely used in each application system.With singlechip technology Continuous development, particularly extensive application of the network technology in measurement and control area, the multimachine network TT＆C system being made up of single-chip microcomputer A direction of singlechip technology development is become.The application of single-chip microcomputer has been not limited solely to traditional automatic monitoring Or control, and the trend to the Distributed Multi system development with network as core is defined, wherein serial communication networking is which In one of important form.As RS232 serial communications are simply easily realized, most of embedded ancillary equipment such as microprintings Machine, liquid crystal display, sensor etc. all make the form of serial communication.But, most computers serial interface in the market Using complex, relatively costly, such case strongly limit entering for some single-chip microcomputers to the multichannel switching circuit of port communications One step application.

In view of this, it is special to propose this utility model.

Utility model content

The technical problems to be solved in the utility model is to overcome the deficiencies in the prior art, there is provided a kind of multi-channel switch Circuit, simple structure, low cost.

For solving above-mentioned technical problem, this utility model using the basic conception of technical scheme is：

A kind of multi-channel switch circuit, including signaling conversion circuit, single chip circuit, decoder circuit, anti-phase process Circuit and channel switching circuit, the output port of the signaling conversion circuit connect the input port of single chip circuit, monolithic The output port on electromechanical road connects the input port of decoder circuit, and the output port of decoder circuit connects anti-phase process circuit Input port, the output port interface channel switching circuit of anti-phase process circuit.

Preferably, in above-mentioned multi-channel switch circuit, the channel switching circuit has two, two channel switching circuits Realize that serial ports is exported by signal output connector (TP2, TP3) respectively.

Preferably, in above-mentioned multi-channel switch circuit, the signaling conversion circuit is RS232 signaling conversion circuits.

Preferably, in above-mentioned multi-channel switch circuit, the decoder circuit is -16 line decoder circuit of 4 line.

Further, in above-mentioned multi-channel switch circuit, the signaling conversion circuit includes serial ports conversion chip D2, Serial ports conversion chip D2 includes 16 pins, wherein：

2nd, 3,4,5,6,7 pins and 4 electric capacity constitute charge pump circuit, go here and there between the 2nd pin C1+ and the 4th pin C1- Connection electric capacity C3, the 3rd pin V+ and the 7th pin V- respectively by electric capacity C5 and C6 ground connection, the 5th pin C2+ and the 6th pin C2- it Between series capacitance C.

Further, in above-mentioned multi-channel switch circuit, the 8th of serial ports conversion chip D2 the, 9,11,13 pins constitute Data channel, the 8th pin R1IN and the 13rd pin T1OUT connect the input RIN and outfan of serial ports of computers TP1 respectively TOUT, the 9th pin R1OUT and the 11st pin T1IN are respectively as receiving terminal RxD and send terminal TxD connection single chip circuits I O Interface.

Further, in above-mentioned multi-channel switch circuit, the 1st pin EN of serial ports conversion chip D2 connects digitally DGND, the 16th pin FORCEOFF connect positive supply, and the 12nd pin FORCEON meets digitally DGND, and the 10th pin INVALID hangs It is empty；15th foot Vcc connects positive supply, and the 14th pin GND meets digitally DGND.

Further, in above-mentioned multi-channel switch circuit, the single chip circuit includes single-chip microcomputer U2, single-chip microcomputer U2 By I O pins be connected respectively signaling conversion circuit and decoder circuit.

After above-mentioned technical proposal, this utility model is had the advantages that compared with prior art：

This utility model circuit cost is low, as the device selected mostly is conventional device, does not have the device of high cost, passes through Simple mcu programming is capable of achieving control, compares the similar 32 passage technology product of domestic other manufacturer productions, and cost is about Only their 30%.Compared with the similar 32 passage technology product of external production, cost only has their 0.3%；

Using simply, prior art majority is used in computer motherboard slot or by USB interface to this utility model circuit Communicate with computer, and this utility model circuit be only capable of achieving the communication with computer using 3 Serial Port Lines (TP serial ports), And program very simply, different from other products, need driving is installed, special function or software package during programming, will be called Can realize；

This utility model circuit easily extension more multichannel, circuit is larger by the current value ratio of signal, actual verification its lead to Overcurrent is not less than 1A, higher than 200～500mA of electric current that prior art homogeneous circuit structure passes through.

Description of the drawings

Fig. 1 is a kind of structural representation of multi-channel switch circuit of this utility model；

Fig. 2 is the structural representation of signaling conversion circuit in a kind of multi-channel switch circuit of this utility model；

Fig. 3 is a specific embodiment schematic diagram of this utility model DC-DC power source circuit；

Fig. 4 is a specific embodiment schematic diagram of this utility model single chip circuit；

Fig. 5 is a specific embodiment schematic diagram of this utility model decoder circuit；

Fig. 6 is a specific embodiment schematic diagram of the anti-phase process circuit of this utility model；

Fig. 7 is a specific embodiment schematic diagram of this utility model channel switching circuit output connector；

Specific embodiment

Below in conjunction with the accompanying drawings and specific embodiment, the utility model is described in further detail, to help understanding that this practicality is new The content of type.

As shown in figs 1 to 6, a kind of multi-channel switch circuit, including signaling conversion circuit, single chip circuit, decoder Circuit, anti-phase process circuit and channel switching circuit, the output port connection single chip circuit of the signaling conversion circuit Input port, the output port of single chip circuit connect the input port of decoder circuit, and the output port of decoder circuit connects The input port of reversed phase processing circuit, the output port interface channel switching circuit of anti-phase process circuit, this utility model reality It is 2 channel switching circuits in applying example, channel switching circuit is to pass through relay in regular channels switching circuit, channel switching circuit Device realizes that break-make is changed, and by signal output connector T P2 and TP3,2 channel switching circuits realize that serial ports is exported, such as Fig. 7 institutes Show.

With reference to shown in Fig. 2, the signaling conversion circuit is RS232 signaling conversion circuits, with reference to shown in Fig. 5, the decoding Device circuit is -16 line decoder circuit of 4 line (hereinafter referred 4-16 decoding circuit)；This utility model is changed by RS232 signals Circuit is communicated with computer, and the computer instruction signal for receiving is converted to the signal that single chip circuit can be used Form, single chip circuit are received and are judged after the instruction of computer, and send corresponding instruction, are decoded by 4-16 The command adapted thereto that single chip circuit sends is entered row decoding by circuit, and then 4-16 decoding circuits export corresponding low level, and this is low Level signal is converted to high level signal output after the process of anti-phase process circuit, and this high level can be to control passage In switching circuit, the relay of respective channel is opened, and the signal of respective channel is transformed in bus.Sent by computer The signal of different instruction and open the relay of different passages, so as to realize the automatic conversion of signal.

The signaling conversion circuit is RS232 signaling conversion circuits, including serial ports conversion chip D2, serial ports conversion chip D2 External DC-DC power source circuit, DC-DC power source circuit are custom circuit, and this utility model provides one and be embodied as such as Fig. 3 institutes Show, do not do unnecessary repeating herein；Serial ports conversion chip D2 includes 16 pins, wherein：

2nd, 3,4,5,6,7 pins and 4 electric capacity constitute charge pump circuit, go here and there between the 2nd pin C1+ and the 4th pin C1- Connection electric capacity C3, the 3rd pin V+ and the 7th pin V- respectively by electric capacity C5 and C6 ground connection, the 5th pin C2+ and the 6th pin C2- it Between series capacitance C4；Charge pump circuit produces positive-negative power, there is provided to the needs of RS-232 serial ports switching levels.

The 8th of serial ports conversion chip D2,9,11,13 pins constitute data channel, the 8th pin R1IN and the 13rd pin T1OUT connects the input RIN and outfan TOUT of serial ports of computers TP1, the 9th pin R1OUT and the 11st pin T1IN respectively Connect the I O Interfaces of single chip circuit respectively as receiving terminal RxD and transmission terminal TxD, serial ports TP1 is defeated for data form computer Enter to be converted into the available RS-232 data outputs of single chip circuit.

The 1st of serial ports conversion chip D2,10,12,16 pins be used for reduce power consumption, serial port no data input situation Under, can flexibly carry out power management；1st pin EN meets digitally DGND, and the 16th pin FORCEOFF connects positive supply, and the 12nd Pin FORCEON meets digitally DGND, and the 10th pin INVALID is hanging；Can be controlled by EN, FORCEON, FORCEOFF pin The working condition that system drives and receives, starts or forbids to reduce automatically power consumption function, so which is operated in different energy consumption shapes State, reduces the purpose of power consumption.When the 16th pin FORCEON be low level, the 12nd pin FORCEOFF be high level when, core Piece automatic circuit break function is effective；In the normal operating mode, it is stipulated that if chip is not examined in reception and transmission pin in the time Useful signal is measured, then automatically into resting state, if the 16th pin FORCEON and the 12nd pin FORCEOFF are high electricity It is flat, then chip automatic circuit break function fails；When automatic circuit break function is effective, if detect reception or send pin having letter Number input, the chip is automatically activated, proceeds to normal operating conditions；If the input voltage of arbitrary receiving channel exceeds specified electricity Pressure, then the 10th pin INVALID is high level (data are effective), otherwise the 10th pin INVALID is low level (data invalid).

The 15th foot Vcc of serial ports conversion chip D2 connects+3V power supplys, and the 14th pin GND meets digitally DGND.

With reference to shown in Fig. 4, it is electromechanical that the single chip circuit may be selected conventional suitable monolithic as mcu programming system Road, at least including single-chip microcomputer U2, two of which I on single-chip microcomputer U2 O pins be connected respectively the of serial ports conversion chip D2 - 16 line decoding circuit of 9 pin R1OUT and the 11st pin T1IN and 4 line, for the transmission of data；This utility model is preferably used Model C 8051F350 single chip circuit.

- 16 line of 4 line of this utility model decodes single channel and anti-phase process circuit for this area mature technology, people in the art The optional conventional device being adapted to of member, such as model 74LS154 decoder circuit, 74LS04 reverse process circuits, herein no longer Add narration；Fig. 5, Fig. 6 provide the specific embodiment of decoding single channel and anti-phase process circuit respectively.

This utility model circuit easily extension more multichannel, can realize by software, be equipped with simple hardware realize it is more The signal control of passage, can expand to 64 passages, 96 passages or more multichannel, for being currently needed for using multi-channel serial The situation of collection can be used.

This utility model circuit is larger by the current value ratio of signal, actual verification its pass through electric current not less than 1A, be higher than 200～500mA of electric current that prior art homogeneous circuit structure passes through.

The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art For art personnel, on the premise of without departing from this utility model principle, some improvements and modifications can also be made, these improve and Retouching also should be regarded as protection domain of the present utility model.

Claims

1. a kind of multi-channel switch circuit, it is characterised in that：Including signaling conversion circuit, single chip circuit, decoder circuit, Anti-phase process circuit and channel switching circuit, the output port of the signaling conversion circuit connect the input of single chip circuit Mouthful, the output port of single chip circuit connects the input port of decoder circuit, and the output port connection of decoder circuit is anti-phase The input port of process circuit, the output port interface channel switching circuit of anti-phase process circuit.

2. multi-channel switch circuit according to claim 1, it is characterised in that：The channel switching circuit has two, By signal output connector (TP2, TP3), two channel switching circuits realize that serial ports is exported respectively.

3. multi-channel switch circuit according to claim 1, it is characterised in that：The signaling conversion circuit is RS232 Signaling conversion circuit.

4. multi-channel switch circuit according to claim 1, it is characterised in that：The decoder circuit is -16 line of 4 line Decoder circuit.

5. multi-channel switch circuit according to claim 3, it is characterised in that：The signaling conversion circuit includes serial ports Conversion chip D2, serial ports conversion chip D2 include 16 pins, wherein：

2nd, 3,4,5,6,7 pins and 4 electric capacity constitute charge pump circuit, series electrical between the 2nd pin C1+ and the 4th pin C1- Hold C3, the 3rd pin V+ and the 7th pin V- is grounded by electric capacity C5 and C6 respectively, is gone here and there between the 5th pin C2+ and the 6th pin C2- Connection electric capacity C.

6. multi-channel switch circuit according to claim 5, it is characterised in that：The 8th of serial ports conversion chip D2,9, 11st, 13 pins constitute data channel, and the 8th pin R1IN and the 13rd pin T1OUT connects the input of serial ports of computers TP1 respectively RIN and outfan TOUT, the 9th pin R1OUT and the 11st pin T1IN are respectively as receiving terminal RxD and send terminal TxD companies Connect the I O Interfaces of single chip circuit.

7. multi-channel switch circuit according to claim 6, it is characterised in that：1st pin of serial ports conversion chip D2 EN meets digitally DGND, and the 16th pin FORCEOFF connects positive supply, and the 12nd pin FORCEON connects digitally DGND, the 10th pin INVALID is hanging；15th foot Vcc connects positive supply, and the 14th pin GND meets digitally DGND.

8. multi-channel switch circuit according to claim 1, it is characterised in that：The single chip circuit includes single-chip microcomputer U2, single-chip microcomputer U2 by I O pins be connected respectively signaling conversion circuit and decoder circuit.