CN203444468U - Communication convertor - Google Patents
Communication convertor Download PDFInfo
- Publication number
- CN203444468U CN203444468U CN201320600230.2U CN201320600230U CN203444468U CN 203444468 U CN203444468 U CN 203444468U CN 201320600230 U CN201320600230 U CN 201320600230U CN 203444468 U CN203444468 U CN 203444468U
- Authority
- CN
- China
- Prior art keywords
- module
- terminal
- positive
- signal
- infrared
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Optical Communication System (AREA)
Abstract
The utility model discloses a communication convertor which comprises a microprocessor module, an isolation signal transmission module, an isolation power supply module and a level conversion module, wherein one end of the isolation signal transmission module for establishing data signal transmission connection between the microprocessor module and the level conversion module is connected with the microprocessor module and the other end of the isolation signal transmission module is connected with the level conversion module, the isolation power supply module used for supplying power for the level conversion module is connected with the level conversion module, the microprocessor module is connected with a computer terminal through a USB (universal serial bus), and the level conversion module is connected with a communication terminal. According to the communication convertor, a computer port can be effectively protected through isolation signal transmission and isolation power supply.
Description
Technical field
The utility model relates to communication technique field, particularly a kind of communication converter.
Background technology
Along with broad development and the application of electronic technology and computer technology, increasing electronic equipment digitizing and intellectuality (as water, electricity, gas table).When researching and developing, test, produce and using this kind equipment, need to set up communication line at computer and equipment room, be used for carrying out data transmission and control.All the time, infrared, RS-232, RS-485 and CAN bus are the most frequently used four kinds of communication modes that arrive in industry.But novel computer has been simplified port mostly at present, has mostly only configured USB mouth., RS232, RS485 infrared in order to realize and CAN communication modes, need to adopt data converter.
Existing data transfer device is to realize RS232 communication with USB-RS232 converter; On this basis, connect RS232-RS485 converter and realize RS485 communication modes; Or connection RS232-CAN converter is realized CAN bus communication mode; With special-purpose micro computer infrared palm machine, realize infrared communication mode.
Current, data converter is powered by the USB port of computing machine, directly be connected to realize data-switching simultaneously with exterior terminal with computing machine, cause like this between computing machine and external interrupt and exist and be electrically connected, when the circuit of exterior terminal occurs that high pressure, overcurrent etc. are unexpected, will damage even computing machine complete machine of computer port.When particularly exterior terminal is commissioning device, be more prone to occur the situation of wiring error.
Utility model content
The purpose of this utility model is to disclose a kind of communication converter, to solve the technical matters that may damage computer port when communicating terminal is connected with computing machine by converter, thus protection calculation machine port effectively.
A kind of communication converter of the present utility model, comprising: microprocessor module, isolation signals transport module, isolation supply module and level switch module; For being connected with microprocessor module setting up isolation signals transport module one end that data-signal transmission is connected between microprocessor module and level switch module, the other end is connected with level switch module; Be used to the isolation supply module of level switch module power supply to be connected with level switch module, microprocessor module is connected with terminal by usb bus, and level switch module is connected with communicating terminal.
Preferably, level switch module comprises one or more for completing the level conversion unit of mutually changing between serial data signal and level signal.
Preferably, level conversion unit comprises: RS232 level conversion unit, RS485 level conversion unit or CAN level conversion unit.
Preferably, communication converter also comprises wireless transport module, and wireless transport module is connected with microprocessor module.
Preferably, wireless transport module comprises one or more for completing the wireless transmission unit of mutually changing between serial data signal and wireless signal transmission.
Preferably, wireless transmission unit comprises: infrared transmission unit or Bluetooth transmission unit.
Preferably, isolation signals transport module comprises: input terminal, lead-out terminal, light emitting diode, photodiode, NPN type triode, current-limiting resistance, the first power supply and second source; The anode of light emitting diode is connected with the first power supply, the negative electrode of light emitting diode is connected with input terminal, the anode of photodiode is connected with the base stage of NPN type triode, the negative electrode of photodiode is connected with second source, the collector of NPN type triode is connected with lead-out terminal, by current-limiting resistance, be connected with second source simultaneously, the grounded emitter of NPN type triode.
Preferably, isolation supply module comprises: magnetic coupling coil, 5V power supply, inverter circuit, current rectifying and wave filtering circuit and mu balanced circuit; The primary coil of magnetic coupling coil is connected with the inverter circuit by 5V Power supply, and current rectifying and wave filtering circuit one end is connected with the secondary coil of magnetic coupling coil, and the other end is connected with the mu balanced circuit for stable output DC voltage.
Preferably, infrared transmission unit comprises: infrared transtation mission circuit and infrared receiving circuit; Infrared transtation mission circuit comprises: infrared-emitting diode, data-signal input terminal, oscillator signal input terminal, the first positive-negative-positive triode and the second positive-negative-positive triode; The anode of infrared-emitting diode connects power supply, the negative electrode of infrared-emitting diode is connected with the emitter of the first positive-negative-positive triode, for receiving the data-signal input terminal of serial data signal, be connected with the base stage of the first positive-negative-positive triode, for receiving the oscillator signal input terminal of oscillator signal, be connected with the base stage of the second positive-negative-positive triode, the collector of the first positive-negative-positive triode is connected with the emitter of the second positive-negative-positive triode, the grounded collector of the second positive-negative-positive triode.
A kind of communication converter of the present utility model is by isolation signals transport module and isolation supply module; avoid existing and being electrically connected between computing machine and external communication terminal; thereby when realizing computing machine and communicating terminal normal transmission data-signal, effective protection calculation machine port and avoid computing machine sustain damage.The serial data signal that simultaneously multi-functional high integration design can send computing machine is converted to RS232 signal, RS485 signal, CAN signal and wireless communication signal etc. simultaneously, integrated level is high, cost-saving, and can avoid repeating to plug port or change-over switch, increase work efficiency.
Accompanying drawing explanation
Fig. 1 is the first structural representation of communication converter in the utility model;
Fig. 2 is the core circuit figure of ARM chip LPC1768FBD100 in the utility model;
Fig. 3 is the circuit diagram of isolation signals transport module first in the utility model;
Fig. 4 is the circuit diagram of isolation signals transport module second portion in the utility model;
Fig. 5 is the circuit diagram of isolating supply module in the utility model;
Fig. 6 is the second structural representation of communication converter in the utility model;
Fig. 7 is the circuit diagram of RS232 level conversion unit in the utility model;
Fig. 8 is the circuit diagram of RS485 level conversion unit in the utility model;
Fig. 9 is the third structural representation of communication converter in the utility model;
Figure 10 is the 4th kind of structural representation of communication converter in the utility model;
Figure 11 is the circuit diagram that in the utility model, Infrared Transmission module 38KHz oscillator signal produces circuit;
Figure 12 is the circuit diagram of Infrared Transmission module infrared signal transtation mission circuit in the utility model;
Figure 13 is the circuit diagram of Infrared Transmission module infrared signal receiving circuit in the utility model.
Mark the following drawings mark thereon by reference to the accompanying drawings:
101-microprocessor module, 102-isolation signals transport module, 103-isolates supply module, 104-level switch module, 105-wireless transport module, 201-RS232 level conversion unit, 202-RS485 level conversion unit, 203-CAN level conversion unit, 301-infrared transmission unit.
Embodiment
Below in conjunction with accompanying drawing, several embodiments of the present utility model are described in detail, but are to be understood that protection domain of the present utility model is not subject to the restriction of embodiment.
As shown in Figure 1, a kind of communication converter of the present utility model comprises: microprocessor module 101, isolation signals transport module 102, isolation supply module 103 and level switch module 104; For being connected with microprocessor module 101 setting up isolation signals transport module 102 one end that data-signal transmission is connected between microprocessor module 101 and level switch module 104, one end is connected with level switch module 104; Be used to the isolation supply module 103 of level switch module 104 power supplies to be connected with level switch module 104, microprocessor module 101 is connected with terminal by usb bus, and level switch module 104 is connected with communicating terminal.
The serial data signal that microprocessor module 101 sends by usb bus receiving computer terminal, then through isolation signals transport module 102, serial data signal is sent to level switch module 104, level switch module 104 converts serial data signal to corresponding level signal, then sends to connected communicating terminal.Accordingly, the level signal that level switch module 104 sends communicating terminal is converted to serial data signal, by isolation signals transport module 102, serial data signal is sent to microprocessor module 101, then microprocessor module 101 sends to terminal by the serial data signal receiving.By communication converter, can complete the data-signal transmission between terminal and communicating terminal.
Because completing data-signal by isolation signals transport module 102, microprocessor module 101 and level switch module 104 transmit, level switch module 104 is by 103 power supplies of isolation supply module simultaneously, the power supply that level switch module 104 is not directly used computing machine USB port to provide, thereby avoid forming and being electrically connected between computing machine and communicating terminal, even when outside line exists high pressure or overcurrent etc. unexpected, can not damage computer port or computing machine yet.Simultaneously microprocessor module 101 can be processed multi-group data simultaneously, and by usb bus can be fast and terminal carry out data-signal transmission, improved processing speed and transmission speed, thereby increased work efficiency.
Preferably, microprocessor module 101 can be ARM chip LPC1768FBD100, and ARM chip LPC1768FBD100 has USB hardware interface and four serial data interfaces.The core circuit figure of ARM chip is shown in Figure 2, wherein, and the terminal USB_D of ARM chip
+with terminal USB_D
-be connected with the USB port of computing machine, thereby can make ARM chip by usb bus and computing machine, complete the transmission of data-signal; Meanwhile, the serial data interface of ARM chip is connected with level switch module 104 by isolation signals transport module 102.Utilize the function that ARM chip LPC1768FBD100 can fast access usb bus, can increase work efficiency; Utilize a plurality of serial data interfaces and the caching function of ARM chip LPC1768FBD100 simultaneously, can be simultaneously and multi-channel serial port carry out data-signal transmission, do not need like this to repeat to plug port or change-over switch, improved work efficiency.
Preferably, in microprocessor module 101, storing the driving file of communication converter; Microprocessor module 101 is also used to indicate the computing machine being connected with microprocessor module 101 driving file is installed.For example, when microprocessor module 101 is ARM chip LPC1768FBD100, ARM chip has two kinds of mode of operations: Disk Mode and data transfer module.When ARM chip is during in Disk Mode, ARM chip is equivalent to a USB flash disk, now indicates the computing machine being connected with ARM chip that the driving file of storing in ARM chip is installed; When ARM chip is during in data transfer module, for realizing the data transmission between computing machine and communicating terminal.The mode of operation of ARM chip is switched and can be realized by mode of operation change-over switch.Microprocessor module is being stored the driving file of communication converter and can driven file by instruct computer Auto-mounting in this locality, thereby without separately adding driving CD, when guaranteeing to drive file to be difficult for losing, also can reduce costs.
Preferably, the isolation signals function of isolation signals transport module 102 can be isolated or magnetic isolates to realize by light.Concrete, isolation signals transport module 102 adopts the method for light isolation signals transmission, and isolation signals transport module 102 comprises: input terminal, lead-out terminal, light emitting diode, photodiode, NPN type triode, current-limiting resistance, the first power supply and second source; Wherein, the anode of light emitting diode is connected with the first power supply, the negative electrode of light emitting diode is connected with input terminal, the anode of photodiode is connected with the base stage of NPN type triode, the negative electrode of photodiode is connected with second source, the collector of NPN type triode is connected with lead-out terminal, and is connected with second source by current-limiting resistance, the grounded emitter of NPN type triode.The circuit structure of isolation signals transport module 102 can complete by photoelectrical coupler TLP114A, shown in Fig. 3 and Fig. 4, introduces in detail the process that realizes isolation signals transmission by photoelectrical coupler TLP114A.The circuit diagram that the serial data signal that isolation signals transport module 102 sends microprocessor module 101 sends to photoelectric conversion module 104 as shown in Figure 3, wherein input terminal TXD is connected with the serial data signal transmission terminal of microprocessor module, the serial data signal sending for receiving microprocessor module 101, lead-out terminal FORMTXD is connected with level switch module 104, for sending serial data signal to level switch module 104.When the serial data signal that receives microprocessor module 101 as the input terminal TXD of isolation signals transport module 102 sends the serial data signal a that terminal sends, the signal that isolation signals transport module 102 carries out electric signal → light signal → electric signal by photoelectrical coupler TLP114A to serial data signal a is changed, and the electric signal relevant to serial data signal a finally obtaining sent to level switch module 104 by terminal FORMTXD.Accordingly, the circuit diagram that the serial data signal that isolation signals transport module 102 sends photoelectric conversion module 104 sends to microprocessor module 101 as shown in Figure 4, wherein, lead-out terminal RXD receives terminal with the serial data signal of microprocessor module 101 and is connected, for sending serial data signal to microprocessor module 101, input terminal TORXD is connected with level switch module 104, the serial data signal sending for incoming level modular converter 104.When the input terminal TORXD of isolation signals transport module 102 receives the serial data signal b of level switch module 104 transmissions, the signal that isolation signals transport module 102 carries out electric signal → light signal → electric signal by photoelectrical coupler TLP114A to serial data signal b is changed, and the electric signal relevant to serial data signal b finally obtaining sent to microprocessor module 101 by lead-out terminal RXD.
Concrete, circuit diagram shown in Figure 3, the photoelectrical coupler TLP114A in Fig. 3 comprises light emitting diode V1, photodiode V2 and NPN type triode VT1; Wherein, the anode of photodiode V2 is connected with the base stage of NPN type triode VT1.The anode of light emitting diode V1 is connected with power supply VCC, the negative electrode of light emitting diode V1 is connected with input terminal TXD by resistance R 1, the negative electrode of photodiode V2 is connected with power vd D, the grounded emitter of NPN type triode VT1, the collector of NPN type triode VT1 is connected with lead-out terminal FORMTXD, and the collector of NPN type triode VT1 is connected with power vd D by current-limiting resistance R2 simultaneously.When the serial data signal a receiving as the input terminal TXD of isolation signals transport module 102 is high level, the not conducting of light emitting diode V1 of photoelectrical coupler TLP114A, thereby the also not conducting of photodiode V2 of photoelectrical coupler TLP114A, NPN type triode VT1 is in cut-off state, so collector and the VDD equipotential of NPN type triode VT1, lead-out terminal FORMTXD is output as high level; When the serial data signal a receiving as the input terminal TXD of isolation signals transport module 102 is low level, the light emitting diode V1 conducting of photoelectrical coupler TLP114A, thereby the also conducting of photodiode V2 of photoelectrical coupler TLP114A, NPN type triode VT1 is in state of saturation, so collector and the VSS equipotential of NPN type triode VT1, lead-out terminal FORMTXD is output as low level.Accordingly, circuit diagram shown in Figure 4, when the serial data signal b receiving as the input terminal TORXD of isolation signals transport module 102 is high level, the not conducting of light emitting diode V4 of photoelectrical coupler TLP114A, thereby the also not conducting of photodiode V3 of photoelectrical coupler TLP114A, NPN type triode VT2 is in cut-off state, so collector and the VCC equipotential of NPN type triode VT2, lead-out terminal RXD is output as high level; When the serial data signal b receiving as the input terminal TORXD of isolation signals transport module 102 is low level, the light emitting diode V4 conducting of photoelectrical coupler TLP114A, thereby the also conducting of photodiode V3 of photoelectrical coupler TLP114A, NPN type triode VT2 is in state of saturation, so collector and the GND equipotential of NPN type triode VT2, lead-out terminal RXD is output as low level.The input and output truth table ginseng of isolation signals transport module 102 is shown in Table 1.
The signal that isolation signals transport module 102 carries out electric signal → light signal → electric signal by photoelectrical coupler TLP114A to the serial data signal receiving is changed, thereby can avoid having electric connecting relation between input end and output terminal, can improve electrical security.
Table 1
Preferably, the isolation function of supplying power of isolation supply module 103 can be isolated or magnetic isolates to realize by light, concrete, isolation supply module 103 adopts the method for magnetic isolation power supply, one end is connected with computing machine USB port, obtains 5V direct current, and the other end is connected with level switch module 104.Adopt the isolation supply module 103 of magnetic isolation power supply to comprise: magnetic coupling coil, power supply, inverter circuit, current rectifying and wave filtering circuit and mu balanced circuit; The primary coil of magnetic coupling coil is connected with the inverter circuit by 5V Power supply, and current rectifying and wave filtering circuit one end is connected with the secondary coil of magnetic coupling coil, the other end with for the mu balanced circuit of stable output DC voltage, connect.The circuit diagram of isolation supply module 103 is shown in Figure 5, wherein, primary coil one end of magnetic coupling coil T1 is connected with 5V direct current, the other end is connected with the collector of NPN type triode VTK, the collector of NPN type triode VTK is also connected with 5V direct current by resistance R 175 simultaneously, the emitter of NPN type triode VTK is by ground connection after the parallel circuit of resistance capacitance, the base stage of NPN type triode VTK is connected with the oscillator signal of 38KHz with resistance R 41 by filter capacitor C96, simultaneously by ground connection after the resistance of a 10K; The secondary coil of magnetic coupling coil T1 connects current rectifying and wave filtering circuit and mu balanced circuit successively, and alternating current is carried out after rectifying and wave-filtering and voltage stabilizing, can obtain galvanic current and press.The state that isolation supply module 103 is controlled triode VTK by the oscillator signal of 38KHz is changed, thereby the 5V direct current that USB port can be provided is converted to switching pulse; By magnetic coupling coil, T1 is delivered to secondary coil by switching pulse from primary coil, then by the connected current rectifying and wave filtering circuit of secondary coil, switching pulse is converted to direct current, by mu balanced circuit, direct current is carried out to voltage stabilizing again, thereby obtain the operable burning voltage of level switch module 104.By isolation supply module, be that level switch module is powered, avoid level switch module and computing machine to have electrical connection, thus can protection calculation machine port and computing machine.
Preferably, in a kind of communication converter of the present utility model, level switch module 104 comprises one or more for completing the level conversion unit of mutually changing between serial data signal and level signal.Be that level switch module can pass through a plurality of level conversion units, complete the task of many group level conversion simultaneously.Concrete, level conversion unit comprises: RS232 level conversion unit, RS485 level conversion unit or CAN level conversion unit.Shown in Figure 6, level switch module 104 comprises three level conversion units, respectively: RS232 level conversion unit 201, RS485 level conversion unit 202 and CAN level conversion unit 203, three level conversion units are connected with microprocessor module 101 by isolation signals transport module 102 respectively, microprocessor module 101 has three groups of serial data interfaces at least, now, RS232 level conversion unit 201, RS485 level conversion unit 202 is connected with the serial data interface of microprocessor module 101 respectively by isolation signals transport module 102 with CAN level conversion unit 203, carry out data-signal transmission.For example, when microprocessor module 101 is ARM chip LPC1768FBD100, ARM chip LPC1768FBD100 has one group of USB interface and four groups of serial data interfaces, and three groups of serial data interfaces can choosing in four groups of serial data interfaces are respectively used to carry out serial data signal transmission with RS232 level conversion unit 201, RS485 level conversion unit 202 and CAN level conversion unit 203.Computing machine can carry out data-signal transmission by while Yu San road serial ports like this, does not need to repeat to plug port or change-over switch, has improved work efficiency.
Preferably, the circuit structure of RS232 level conversion unit 201 can complete by RS232 transceiver SP3232E, and the circuit diagram of RS232 level conversion unit 201 is shown in Figure 7.Wherein, the terminal TXD5 of RS232 level conversion unit 201 is connected with isolation signals transport module 102, for receiving the serial data signal that isolation obtains through photoelectricity; By the phase inverter in transceiver SP3232E, the serial data signal through photoelectricity isolation that terminal TXD5 can be received is converted to RS232 antilogical level signal; Terminal 232_TXD is connected with external communicating terminal, for the RS232 antilogical level signal of acquisition is sent to communicating terminal.Accordingly, the terminal 232_RXD of RS232 level conversion unit 201 is connected with external communicating terminal, the RS232 antilogical level signal sending for receiving communicating terminal; By the phase inverter in transceiver SP3232E, the RS232 antilogical level signal that terminal 232_RXD can be received is converted to serial data signal; Terminal RXD5 is connected with isolation signals transport module 102, for the serial data signal after conversion is sent to isolation signals transport module 102.The input and output truth table ginseng of RS232 level conversion unit 201 is shown in Table 2.
Table 2
Preferably, the circuit structure of RS485 level conversion unit 202 can complete by chip MAX13085, and the circuit diagram of RS485 level conversion unit 202 is shown in Figure 8.Wherein, the terminal TXD_49 of RS485 level conversion unit 202 is connected with isolation signals transport module 102, for receiving the serial data signal that isolation obtains through photoelectricity; The terminal RXD_485 of RS485 level conversion unit 202 is connected with isolation signals transport module 102, for sending serial data signal to isolation signals transport module 102; Terminal 485_A is connected with outside communicating terminal with terminal 485_B, for setting up data-signal transmission with communicating terminal, is connected.
Concrete, when RS485 level conversion unit 202 need to be converted to RS485 differential signal by the serial data signal after photoelectricity isolation, terminal TXD_49 receives the serial data signal after photoelectricity isolation.If the serial data signal that terminal TXD_49 receives is high level, the terminal DI of chip MAX13085 is high level, simultaneously the terminal of chip MAX13085
for low level, terminal DE are high level, now lead-out terminal 485_A is high level, and terminal 485_B is low level, and the voltage between terminal 485_A and terminal 485_B is for just; If the serial data signal that terminal TXD_49 receives is low level, the terminal DI of chip MAX13085 is low level, simultaneously the terminal of chip MAX13085
for low level, terminal DE are high level, now lead-out terminal 485_A is low level, and terminal 485_B is high level, and the voltage between terminal 485_A and terminal 485_B is for negative.The serial data signal through photoelectricity isolation that terminal TXD_49 can be received by chip MAX13085 is converted to RS485 differential signal, by terminal 485_A and terminal 485_B, RS485 differential signal is sent to external communication terminal.Accordingly, when RS485 level conversion unit 202 need to be converted to serial data signal by RS485 differential signal, terminal 485_A and terminal 485_B receive the RS485 differential signal that communicating terminal sends, and now no matter which kind of logic level terminal TXD_49 is, the terminal of chip MAX13085
maintenance low level state is constant, terminal DE keeps high level state constant.If the RS485 differential signal voltage between terminal 485_A and terminal 485_B is for just, A-B is logical one, and lead-out terminal RXD_485 is high level; If the RS485 differential signal voltage between terminal 485_A and terminal 485_B is for negative, A-B is logical zero, and lead-out terminal RXD_485 is low level.The input and output truth table ginseng of RS485 level conversion unit 202 is shown in Table 3.
Table 3
Preferably, the circuit structure of CAN level conversion unit 203 can complete by high-speed CAN transceiver TJA1051, and utilizing high-speed CAN transceiver TJA1051 to realize differential sending and receiving function is prior art, does not describe in detail herein.
Preferably, as shown in Figure 9, a kind of communication converter of the present utility model also comprises wireless transport module 105, and wireless transport module 105 is connected with microprocessor module 101.When communicating terminal carries out data transmission by wireless transport module 105 and computing machine, between communicating terminal and computing machine, there is not electrical connection, so equally can protection calculation machine port without isolation signals transport module 102.
Preferably, in a kind of communication converter of the present utility model, wireless transport module 105 comprises one or more for completing the wireless transmission unit of mutually changing between serial data signal and wireless signal transmission.Concrete, wireless transmission unit comprises: Infrared Transmission module or Bluetooth transmission module.Shown in Figure 10, wireless transport module 105 comprises a wireless transmission unit, for infrared transmission unit 301, infrared transmission unit 301 is directly connected with microprocessor module 101, level switch module 104 comprises three level conversion units simultaneously, is respectively RS232 level conversion unit 201, RS485 level conversion unit 202 and CAN level conversion unit 203.After computing machine is set up transmission of data signals and is connected by usb bus and microprocessor module 101, can be simultaneously and RS232 interface communication terminal, RS485 interface communication terminal, CAN interface communication terminal and infrared communication terminal transmission data-signal.
Preferably, infrared transmission unit 301 comprises: infrared transtation mission circuit and infrared receiving circuit.Below in conjunction with Figure 11, Figure 12 and Figure 13, further introduce the circuit structure of infrared transmission unit 301.Concrete, infrared transmission unit 301 comprises: 38KHz oscillator signal produces circuit, infrared signal transtation mission circuit and infrared signal receiving circuit.Wherein, the circuit structure diagram of 38KHz oscillator signal generation circuit is shown in Figure 11, resistance R 4 is connected with capacitor C 1 with after a phase inverter parallel connection in hex inverter 74HC04, connect with the parallel circuit of another phase inverter in hex inverter 74HC04 with resistance R 5 again, then in parallel with crystal oscillator X1, finally by the 3rd phase inverter in hex inverter 74HC04, be connected with oscillator signal output terminal XOUT, oscillator signal output terminal XOUT is connected with infrared signal transtation mission circuit, for infrared signal transtation mission circuit provides 38KHz oscillator signal.Wherein resistance R 4 and R5 are respectively the phase inverter in parallel with it negative feedback are provided, and increase stability; The oscillator signal simultaneously sending for crystal oscillator by the phase inverter in hex inverter 74HC04 provides 180 ° of required phase shifts, thus the 38KHz oscillator signal that output terminal XOUT can stable output.
The circuit structure diagram of infrared signal transtation mission circuit is shown in Figure 12, and terminal TXD4 is connected with isolation signals transport module 102, for receiving serial data signal, is connected with the base stage of positive-negative-positive triode VT3 simultaneously; Terminal XIN is connected with the terminal XOUT that 38KHz oscillator signal produces circuit, for receiving stable 38KHz oscillator signal, is connected with the base stage of positive-negative-positive triode VT4 simultaneously; Infrared light emitting diode V5 is for sending infrared signal to communicating terminal, and the anode of infrared light emitting diode V5 meets power supply VCC, and negative electrode is connected with resistance R 8 after positive-negative-positive triode VT3 and positive-negative-positive triode VT4, then ground connection.Concrete, when terminal TXD4 receives serial data signal after photoelectricity isolation and is high level, positive-negative-positive triode VT3 is in cut-off state, not conducting of triode VT3, thereby infrared light emitting diode V5, always in off state, does not now send infrared signal.When the serial data signal after photoelectricity isolation of terminal TXD4 reception is low level, positive-negative-positive triode VT3 is in conducting state; When the oscillator signal now receiving as terminal XIN is high level, not conducting of triode VT4, thus infrared light emitting diode V5 is in off state; When the oscillator signal receiving as terminal XIN is low level, triode VT4 conducting, thereby infrared light emitting diode V5 in conducting state, now infrared light emitting diode sends infrared signal to communicating terminal.By 38KHz oscillator signal, can periodically control connection and the shutoff of infrared light emitting diode AK, thereby the serial data signal that terminal TXD4 can be received is converted to the infrared signal that carrier frequency is 38KHz.Be chosen in when serial data signal that terminal TXD4 receives is low level and send infrared signal, do not send during for high level infrared signal, the sensitivity that can improve infrared signal.
The circuit structure diagram of infrared signal receiving circuit is shown in Figure 13, the terminal VCC of infrared remote receiver RECE is connected with power supply VCC by resistance R 9, terminal GND ground connection, the signal output terminal VOUT splicing ear RXD4 of infrared remote receiver RECE, and be connected with isolation signals transport module 102, for exporting serial data signal.When infrared remote receiver RECE receives the infrared signal of communicating terminal transmission, infrared remote receiver RECE is converted to serial data signal by infrared signal, by terminal RXD4, serial data signal is sent to isolation signals transport module 102, and then can data-signal be sent to computing machine by microprocessor module 101.
A kind of communication converter that the utility model provides is by isolation signals transport module and isolation supply module; avoid existing and being electrically connected between computing machine and external communication terminal; thereby when realizing computing machine and communicating terminal normal transmission data-signal, effective protection calculation machine port and avoid computing machine sustain damage.Simultaneously, the serial data signal that multi-functional high integration design can send computing machine is converted to RS232 signal, RS485 signal, CAN signal and wireless communication signal etc. simultaneously, and integrated level is high, cost-saving, and can avoid repeating to plug port or change-over switch, increase work efficiency.Microprocessor module is being stored the driving file of communication converter and can driven file by instruct computer Auto-mounting in this locality, thereby without separately adding driving CD, when guaranteeing to drive file to be difficult for losing, also can reduce costs.
Disclosed is above only several specific embodiment of the present utility model, and still, the utility model is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection domain of the present utility model.
Claims (9)
1. a communication converter, is characterized in that, described communication converter comprises: microprocessor module, isolation signals transport module, isolation supply module and level switch module;
For being connected with described microprocessor module setting up described isolation signals transport module one end that data-signal transmission is connected between described microprocessor module and described level switch module, the other end is connected with described level switch module;
Be used to the described isolation supply module of described level switch module power supply to be connected with described level switch module, described microprocessor module is connected with terminal by usb bus, and described level switch module is connected with communicating terminal.
2. communication converter according to claim 1, is characterized in that, described level switch module comprises one or more for completing the level conversion unit of mutually changing between serial data signal and level signal.
3. communication converter according to claim 2, is characterized in that, described level conversion unit comprises: RS232 level conversion unit, RS485 level conversion unit or CAN level conversion unit.
4. communication converter according to claim 1, is characterized in that, described communication converter also comprises wireless transport module, and described wireless transport module is connected with described microprocessor module.
5. communication converter according to claim 4, is characterized in that, described wireless transport module comprises one or more for completing the wireless transmission unit of mutually changing between serial data signal and wireless signal transmission.
6. communication converter according to claim 5, is characterized in that, described wireless transmission unit comprises: infrared transmission unit or Bluetooth transmission unit.
7. according to the arbitrary described communication converter of claim 1-6, it is characterized in that, described isolation signals transport module comprises: input terminal, lead-out terminal, light emitting diode, photodiode, NPN type triode, current-limiting resistance, the first power supply and second source;
The anode of described light emitting diode is connected with described the first power supply, the negative electrode of described light emitting diode is connected with described input terminal, the anode of described photodiode is connected with the base stage of described NPN type triode, the negative electrode of described photodiode is connected with described second source, the collector of described NPN type triode is connected with described lead-out terminal, and be connected with described second source by described current-limiting resistance, the grounded emitter of described NPN type triode.
8. according to the arbitrary described communication converter of claim 1-6, it is characterized in that, described isolation supply module comprises: magnetic coupling coil, power supply, inverter circuit, current rectifying and wave filtering circuit and mu balanced circuit;
The primary coil of described magnetic coupling coil is connected with the inverter circuit by described Power supply, and described current rectifying and wave filtering circuit one end is connected with the secondary coil of described magnetic coupling coil, and the other end is connected with the described mu balanced circuit for stable output DC voltage.
9. communication converter according to claim 6, is characterized in that, described infrared transmission unit comprises: infrared transtation mission circuit and infrared receiving circuit;
Described infrared transtation mission circuit comprises: infrared-emitting diode, data-signal input terminal, oscillator signal input terminal, the first positive-negative-positive triode and the second positive-negative-positive triode; The anode of described infrared-emitting diode connects power supply, the negative electrode of described infrared-emitting diode is connected with the emitter of described the first positive-negative-positive triode, for receiving the described data-signal input terminal of serial data signal, be connected with the base stage of described the first positive-negative-positive triode, for receiving the described oscillator signal input terminal of oscillator signal, be connected with the base stage of described the second positive-negative-positive triode, the collector of described the first positive-negative-positive triode is connected with the emitter of described the second positive-negative-positive triode, the grounded collector of described the second positive-negative-positive triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320600230.2U CN203444468U (en) | 2013-09-27 | 2013-09-27 | Communication convertor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320600230.2U CN203444468U (en) | 2013-09-27 | 2013-09-27 | Communication convertor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203444468U true CN203444468U (en) | 2014-02-19 |
Family
ID=50095499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320600230.2U Expired - Lifetime CN203444468U (en) | 2013-09-27 | 2013-09-27 | Communication convertor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203444468U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104091493A (en) * | 2014-07-16 | 2014-10-08 | 太原市奥特欣通电子科技有限公司 | Vehicle-mounted signal collection and conversion device for driver tests |
| CN104216855A (en) * | 2014-09-17 | 2014-12-17 | 山东广达锂电检测研究院有限公司 | USB (universal serial bus) to RS-485 active isolated convertor |
| CN104850520A (en) * | 2015-05-22 | 2015-08-19 | 国家电网公司 | Novel multifunctional USB converter and conversion method therefor |
| CN105141491A (en) * | 2015-09-23 | 2015-12-09 | 杭州得诚电力科技有限公司 | RS485 communication circuit capable of achieving self-sending and self-receiving and method |
| CN107273330A (en) * | 2017-08-18 | 2017-10-20 | 安图实验仪器(郑州)有限公司 | Three-wire system serial communication interface isolation circuit module |
| CN107896152A (en) * | 2017-12-28 | 2018-04-10 | 黑龙江龙电电气有限公司 | Multi-channel communication sharing device and method |
| CN109743052A (en) * | 2019-03-04 | 2019-05-10 | 曼瑞德智能***(上海)股份有限公司 | A kind of isolation communicating circuit for realizing self-test |
| CN110009898A (en) * | 2019-04-29 | 2019-07-12 | 深圳市嘉昱机电有限公司 | A kind of infrared receiving device and infrared receiving system |
| CN110320867A (en) * | 2018-03-30 | 2019-10-11 | 内蒙古伊泰信息技术有限公司 | A kind of weighing system equipment centralized control system and method based on Internet of Things |
| CN112152897A (en) * | 2020-09-14 | 2020-12-29 | 珠海格力电器股份有限公司 | Communication chip circuit, communication method, storage medium, and electronic device |
-
2013
- 2013-09-27 CN CN201320600230.2U patent/CN203444468U/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104091493A (en) * | 2014-07-16 | 2014-10-08 | 太原市奥特欣通电子科技有限公司 | Vehicle-mounted signal collection and conversion device for driver tests |
| CN104216855A (en) * | 2014-09-17 | 2014-12-17 | 山东广达锂电检测研究院有限公司 | USB (universal serial bus) to RS-485 active isolated convertor |
| CN104216855B (en) * | 2014-09-17 | 2017-06-20 | 东莞市冠濠电子有限公司 | A kind of USB turns the active isolating converters of RS 485 |
| CN104850520A (en) * | 2015-05-22 | 2015-08-19 | 国家电网公司 | Novel multifunctional USB converter and conversion method therefor |
| CN104850520B (en) * | 2015-05-22 | 2017-10-03 | 国家电网公司 | A kind of USB multifunction converters and its conversion method |
| CN105141491B (en) * | 2015-09-23 | 2023-05-09 | 杭州得诚电力科技股份有限公司 | RS485 communication circuit and method for realizing spontaneous self-receiving |
| CN105141491A (en) * | 2015-09-23 | 2015-12-09 | 杭州得诚电力科技有限公司 | RS485 communication circuit capable of achieving self-sending and self-receiving and method |
| CN107273330A (en) * | 2017-08-18 | 2017-10-20 | 安图实验仪器(郑州)有限公司 | Three-wire system serial communication interface isolation circuit module |
| CN107273330B (en) * | 2017-08-18 | 2023-05-09 | 安图实验仪器(郑州)有限公司 | Three-wire system serial communication interface isolation circuit module |
| CN107896152A (en) * | 2017-12-28 | 2018-04-10 | 黑龙江龙电电气有限公司 | Multi-channel communication sharing device and method |
| CN110320867A (en) * | 2018-03-30 | 2019-10-11 | 内蒙古伊泰信息技术有限公司 | A kind of weighing system equipment centralized control system and method based on Internet of Things |
| CN109743052A (en) * | 2019-03-04 | 2019-05-10 | 曼瑞德智能***(上海)股份有限公司 | A kind of isolation communicating circuit for realizing self-test |
| CN109743052B (en) * | 2019-03-04 | 2024-04-30 | 曼瑞德智能***(上海)股份有限公司 | Isolation communication circuit for realizing self-checking |
| CN110009898A (en) * | 2019-04-29 | 2019-07-12 | 深圳市嘉昱机电有限公司 | A kind of infrared receiving device and infrared receiving system |
| CN110009898B (en) * | 2019-04-29 | 2024-02-06 | 深圳市嘉昱机电有限公司 | Infrared receiving device and infrared receiving system |
| CN112152897B (en) * | 2020-09-14 | 2021-11-02 | 珠海格力电器股份有限公司 | Communication chip circuit, communication method, storage medium, and electronic device |
| CN112152897A (en) * | 2020-09-14 | 2020-12-29 | 珠海格力电器股份有限公司 | Communication chip circuit, communication method, storage medium, and electronic device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203444468U (en) | Communication convertor | |
| CN208158584U (en) | A kind of master-slave mode direct current carrier communication system | |
| CN103401587A (en) | Data acquisition device and method based on power carrier-wave communication technology | |
| CN205142203U (en) | Automatic transceiver circuits of RS485 | |
| CN104077260B (en) | A kind of concentrator M BUS host communication interface arrangements | |
| CN105160862A (en) | M-BUS (METER-BUS) slave communication circuit | |
| CN203520091U (en) | Can communication interface circuit | |
| CN210270872U (en) | Portable serial port detector | |
| CN204316537U (en) | A kind of WIFI change-over circuit module | |
| CN103279443A (en) | Uart communication signal conversion circuit | |
| CN207743959U (en) | A kind of data transmission circuit based on RS232 | |
| CN208128264U (en) | A kind of control circuit for realizing nonpolarity power supply and communication based on two-wire system | |
| CN208924258U (en) | A kind of RS485 full duplex communication circuit of ammeter | |
| CN206515816U (en) | A kind of self-compensating RS485 circuits of optocoupler transmission delay | |
| CN203405491U (en) | Support plate circuit used for electrical energy collection terminal and support plate | |
| CN103684588A (en) | Infrared ray signal transmitting device and electronic equipment | |
| CN112363964B (en) | MBUS host circuit with high reliability | |
| CN202563005U (en) | Single-phase electric energy meter suitable for two-way automatic communication system (TWACS) communication function | |
| CN201820346U (en) | Industrial carrier wave data universal serial bus (USB) converter | |
| CN104519623A (en) | Transmission system based on DALI (digital addressable lighting interface) protocol control commands | |
| CN216772411U (en) | 4-channel RS485 expansion board based on anti-surge technology | |
| CN205192546U (en) | Flow monitor | |
| CN204442372U (en) | A kind of carrier communication circuit and electronic equipment | |
| CN117394846B (en) | Isolation device for intrinsically safe devices | |
| CN102110358B (en) | Gas water heater communication system with remote controller power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |