CN201623714U - Two-way communication circuit - Google Patents
Two-way communication circuit Download PDFInfo
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- CN201623714U CN201623714U CN2010201235641U CN201020123564U CN201623714U CN 201623714 U CN201623714 U CN 201623714U CN 2010201235641 U CN2010201235641 U CN 2010201235641U CN 201020123564 U CN201020123564 U CN 201020123564U CN 201623714 U CN201623714 U CN 201623714U
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Abstract
The utility model discloses a two-way communication circuit, which is used for the signal transmission between a motor controller and external equipment. The two-way communication circuit is provided with a communication port D0, a signal output port D1 and a signal input port D2. The communication port D0 and the signal output port D1 are respectively connected with the external equipment and the signal input port RXD of the central controller MCU (Microprogrammed Control Unit) of the motor controller, thereby data can be sent to the motor controller from the external equipment. The communication port D0 and the signal input port D2 are respectively connected with the external equipment and the signal output port TXD of the central controller MCU of the motor controller, thereby data can be sent to the external equipment from the motor controller. The utility model can be connected and communicated with the external equipment by using only one signal wire, thereby reducing the communication ports and saving the cost of signal wire communication. In addition, by adopting a voltage comparator LM393, the function of half-duplex communication is achieved, and the reliability of the signal transmission is high.
Description
Technical field:
The utility model relates to the electronic communication field, more particularly, relates to a kind of two-way communication circuit that communicates with external device in the electric machine controller that is applied in.
Background technology:
Current, in the electric machine controller communication technical field, the telecommunication circuit in the electric machine controller extensively adopts serial communication mode--carry out signal communication as standard serial communication protocols such as extensive employing RD232, RS485 and external device.But when adopting these communication protocols, this telecommunication circuit also will be used three holding wires of RXD, TXD and GND to be connected with external device simultaneously and communicate, and there are the following problems: the telecommunication circuit interface is more, uses holding wire more, the circuit structure complexity, the cost height.
Summary of the invention:
The purpose of this utility model is to solve above-mentioned technological deficiency of the prior art, provides a kind of circuit structure simple, the two-way communication circuit that holding wire is few, and the cost of feasible communication reduces, convenient design and maintenance.
The utility model is to be achieved by following technical scheme.
A kind of two-way communication circuit, be used for the signal transmission between electric machine controller and the external equipment, it has a communication port D0, a signal output part D1 and a signal input part D2, communication port D0, signal output part D1 connects the signal input port RXD on the central controller MCU of external equipment and electric machine controller respectively, realization sends data from external equipment to electric machine controller, communication port D0, signal input part D2 connects the signal output port TXD on the central controller MCU of external equipment and electric machine controller respectively, realizes from electric machine controller to outside equipment sending data.
Two-way communication circuit comprises signal conversion unit, and an end of signal conversion unit communicates by communication port D0 and external equipment, and its other end is connected to central controller MCU by signal output part D1, signal input part D2 respectively.
Two-way communication circuit also comprises two signal isolation circuit, and signal isolation circuit one end is realized the signal transmission through connecting signal conversion unit and external equipment, and the other end connects central controller MCU.
Above-mentioned described external equipment is communication equipment or programming device.
Above-mentioned described signal conversion unit adopts voltage comparator LM393.
Above-mentioned described signal isolation circuit adopts photoelectrical coupler.
This two-way communication circuit is arranged on the electric machine controller the inside.
Compared with prior art, the beneficial effects of the utility model are: 1) be arranged on two-way communication circuit in the electric machine controller and only need use a holding wire just can be connected with external device to communicate, reduced communication interface, saved the signal line communications cost, and adopt voltage comparator LM393, realized the half-duplex operation function, signal transmission reliability height; 2) circuit structure is simple, uses holding wire few, with low cost, designs and safeguards simple and convenient.
Description of drawings:
Fig. 1 is an application principle block diagram of the present utility model.
Fig. 2 is the circuit theory diagrams of a kind of better embodiment of the present utility model.
Embodiment:
Also in conjunction with the accompanying drawings the utility model is described in further detail below by specific embodiment.
As shown in Figure 1, a kind of two-way communication circuit, be used for the signal transmission between electric machine controller and the external equipment, it has a communication port D0, a signal output part D1 and a signal input part D2, communication port D0, signal output part D1 connects the signal input port RXD on the central controller MCU of external equipment and electric machine controller respectively, realization sends data from external equipment to electric machine controller, communication port D0, signal input part D2 connects the signal output port TXD on the central controller MCU of external equipment and electric machine controller respectively, realizes from electric machine controller to outside equipment sending data.This two paths of signals transmission has interlocked relationship, and this interlock function is finished by central controller MCU control.
Two-way communication circuit comprises signal conversion unit, one end of signal conversion unit communicates by communication port D0 and external equipment, its other end is connected to central controller MCU by signal output part D1, signal input part D2 respectively, it also comprises two signal isolation circuit, signal isolation circuit one end is realized the signal transmission through connecting signal conversion unit and external equipment, and the other end connects central controller MCU; External equipment is communication equipment or programming device, and this two-way communication circuit is arranged on the electric machine controller the inside.
As shown in Figure 2, signal conversion unit comprises voltage comparator LM393 and resistance R 1～R6, resistance R 1 series resistor R3 inserts power supply VCC1, resistance R 2 is serially connected between the output port 1 and VCC1 of voltage comparator LM393, output port 1 is connected with communication port D0, inverting input mouth 6 is connected between resistance R 1 and the resistance R 3, in-phase input end mouth 5 connects communication port D0, port 8 connects VCC1, port 4 ground connection, resistance R 4 are serially connected between another inverting input mouth 2 and VCC1 of voltage comparator LM393; Resistance R 6 one terminates to inverting input mouth 2, other end ground connection; Resistance R 5 is serially connected between another in-phase input end mouth 3 and VCC1 of voltage comparator LM393.
In conjunction with Fig. 1, Fig. 2 as can be known, one of them signal isolation circuit comprises photoelectrical coupler U1 and resistance R 8, another signal isolation circuit comprises photoelectrical coupler U2 and resistance R 7, R9, the pin 4 of photoelectrical coupler U1 is connected with the in-phase input end mouth 3 of voltage comparator LM393, receives the signal output port TXD of central controller MCU behind the pin two series resistor R8; The pin two of photoelectrical coupler U2 is connected with another output port 7 of voltage comparator LM393, and pin 4 is received the signal input port RXD of central controller MCU.
Claims (6)
1. two-way communication circuit, be used for the signal transmission between electric machine controller and the external equipment, it is characterized in that: it has a communication port D0, a signal output part D1 and a signal input part D2, communication port D0, signal output part D1 connects the signal input port RXD on the central controller MCU of external equipment and electric machine controller respectively, realization sends data from external equipment to electric machine controller, communication port D0, signal input part D2 connects the signal output port TXD on the central controller MCU of external equipment and electric machine controller respectively, realizes from electric machine controller to outside equipment sending data.
2 a kind of two-way communication circuits according to claim 1, it is characterized in that: two-way communication circuit comprises signal conversion unit, one end of signal conversion unit communicates by communication port D0 and external equipment, and its other end is connected to central controller MCU by signal output part D1, signal input part D2 respectively.
3. a kind of two-way communication circuit according to claim 2, it is characterized in that: two-way communication circuit also comprises two signal isolation circuit, signal isolation circuit one end is realized the signal transmission through connecting signal conversion unit and external equipment, and the other end connects central controller MCU.
4. a kind of two-way communication circuit according to claim 3 is characterized in that: external equipment is communication equipment or programming device.
5. a kind of two-way communication circuit according to claim 3 is characterized in that: signal conversion unit adopts voltage comparator LM393.
6. a kind of two-way communication circuit according to claim 3 is characterized in that: signal isolation circuit adopts photoelectrical coupler.
7. according to claim 3 or 5 described a kind of two-way communication circuits, it is characterized in that: this two-way communication circuit is arranged on the electric machine controller the inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201235641U CN201623714U (en) | 2010-02-25 | 2010-02-25 | Two-way communication circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201235641U CN201623714U (en) | 2010-02-25 | 2010-02-25 | Two-way communication circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201623714U true CN201623714U (en) | 2010-11-03 |
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ID=43027168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201235641U Expired - Lifetime CN201623714U (en) | 2010-02-25 | 2010-02-25 | Two-way communication circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201623714U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149892A (en) * | 2013-01-29 | 2013-06-12 | 哈尔滨工业大学 | Control system with long-distance control function |
| CN105472290B (en) * | 2014-09-12 | 2019-04-09 | 杭州海康威视数字技术股份有限公司 | The processing method and processing device of data transmit-receive operational mode |
-
2010
- 2010-02-25 CN CN2010201235641U patent/CN201623714U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149892A (en) * | 2013-01-29 | 2013-06-12 | 哈尔滨工业大学 | Control system with long-distance control function |
| CN103149892B (en) * | 2013-01-29 | 2015-06-24 | 哈尔滨工业大学 | Control system with long-distance control function |
| CN105472290B (en) * | 2014-09-12 | 2019-04-09 | 杭州海康威视数字技术股份有限公司 | The processing method and processing device of data transmit-receive operational mode |
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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: 20101103 |