CN203405812U - Serial communication controller - Google Patents
Serial communication controller Download PDFInfo
- Publication number
- CN203405812U CN203405812U CN201320499996.6U CN201320499996U CN203405812U CN 203405812 U CN203405812 U CN 203405812U CN 201320499996 U CN201320499996 U CN 201320499996U CN 203405812 U CN203405812 U CN 203405812U
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- China
- Prior art keywords
- port line
- serial port
- card chip
- chip
- operational amplifier
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Abstract
The utility model provides a serial communication controller. The serial communication controller comprises a power supply, an ARM processor and a serial port line, wherein the serial port line is connected with an RS422 chip, the ARM processor is respectively connected with an RS422 chip, a network card chip, a sound card chip and a work indicating circuit, the network card chip is connected with a network interface, the input end of the sound card chip is connected with the output end of an operational amplifier, the output end of the sound card chip is respectively connected with the input end of the operational amplifier and the input end of a power amplifier, and the operational amplifier and the power amplifier output audio signals through an audio output control device. The serial communication controller can complete mutual conversion of RS422 (or RS485) and network data and conversion of the audio signals, and can be used for different interfaces, such as automatic radio interfaces, main control interfaces, mutual control interfaces and noise detection interfaces. The serial communication controller has the advantages of being simple in structure, small in size, reliable in circuit, convenient to maintain, low in manufacturing cost, easy and convenient to operate and the like.
Description
Technical field
The utility model belongs to voice broadcast service field, especially relates to a kind of serial ports controller.
Background technology
Broadcasting for train, as a kind of special communication media bearing be passenger's service, policy propaganda, burst constantly commander speedily carry out rescue work, emergency evacuation, accident treatment with the task such as communicate by letter in time.In existing technology, traditional broadcast is backward in technique, compatible, extendability is not good, and circuit, structure are too complicated, and using method is complicated, and unreliable, exist install complicated, safeguard inconvenience, failure rate high-technology problem.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of simple in structure, easy to operate serial ports controller, is especially suitable in the different interface such as Auto broadcast interface in digital network type broadcast system, master control interface, cross complaint interface, noise measuring interface.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of serial ports controller, comprise power supply, arm processor and Serial Port Line, described Serial Port Line R+, R-, T+ is connected with RS422 chip respectively with T-, described arm processor respectively with RS422 chip, network card chip, sound card chip is connected with working indicating, described network card chip is connected with network interface, the input end of described sound card chip is connected with the output terminal of operational amplifier, on described operational amplifier, be parallel with adjustable resistance, the output terminal of described sound card chip is connected with the input end of operational amplifier and power amplifier respectively, the output terminal of described operational amplifier and power amplifier is connected with audio output control device, described audio output control device output audio signal, described arm processor is connected with the base stage of triode Q1 by resistance, the grounded emitter of described triode Q1, the collector of described triode Q1 divides two-way, one tunnel is connected with Serial Port Line T+, another road is connected with the negative electrode of diode D1, the anode of described diode D1 is connected with the negative electrode of diode D2, the anode of described diode D2 passes through resistance eutral grounding, described arm processor is also connected with the collector of triode Q2, the grounded emitter of described triode Q2, described triode Q2 is in parallel with a resistor.
Further, described audio output control device is two wire jumpers that are connected with operational amplifier and two wire jumpers that are connected with power amplifier.
Further, described Serial Port Line T+ and described RS422 chip chamber are provided with wire jumper, between described Serial Port Line T+ and Serial Port Line R+, are provided with wire jumper, between described Serial Port Line T-and Serial Port Line R-, are provided with wire jumper, between described Serial Port Line T+ and the negative electrode of diode D1, are provided with wire jumper.
Further, described arm processor is LPC1768, and described network card chip is DP83848, and described sound card chip is UDA1341.
Further, RS422 chip is selected MAX3491/MAX3491E.
Further, described power supply to select LM2575(be that 24V turns 5V's) and LM1117-33(5V turn 3V's).
Advantage and the good effect that the utlity model has are: owing to adopting technique scheme, serial ports controller can complete RS422(or RS485) with the conversion of the turning mutually of network data, sound signal, this controller can be used in the different interface such as Auto broadcast interface, master control interface, cross complaint interface, noise measuring interface; Have simple in structure, volume is little, circuit is reliable, be convenient to maintenance, low cost of manufacture, the advantage such as easy and simple to handle.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of serial ports controller of the utility model.
Embodiment
As shown in Figure 1, a kind of serial ports controller of the utility model, comprise power supply, arm processor and Serial Port Line, described Serial Port Line R+, R-, T+ is connected with RS422 chip respectively with T-, described arm processor respectively with RS422 chip, network card chip, sound card chip is connected with working indicating, described network card chip is connected with network interface, the input end of described sound card chip is connected with the output terminal of operational amplifier, on described operational amplifier, be parallel with adjustable resistance, the output terminal of described sound card chip is connected with the input end of operational amplifier and power amplifier respectively, the output terminal of described operational amplifier and power amplifier is connected with audio output control device, described audio output control device output audio signal, described arm processor is connected with the base stage of triode Q1 by resistance, the grounded emitter of described triode Q1, the collector of described triode Q1 divides two-way, one tunnel is connected with Serial Port Line T+, another road is connected with the negative electrode of diode D1, the anode of described diode D1 is connected with the negative electrode of diode D2, the anode of described diode D2 passes through resistance eutral grounding, described arm processor is also connected with the collector of triode Q2, the grounded emitter of described triode Q2, described triode Q2 is in parallel with a resistor, described audio output control device is two wire jumpers that are connected with operational amplifier and two wire jumpers that are connected with power amplifier, described Serial Port Line T+ and described RS422 chip chamber are provided with wire jumper, between described Serial Port Line T+ and Serial Port Line R+, be provided with wire jumper, between described Serial Port Line T-and Serial Port Line R-, be provided with wire jumper, between described Serial Port Line T+ and the negative electrode of diode D1, be provided with wire jumper, described arm processor is LPC1768, described network card chip is DP83848, described sound card chip is UDA1341, RS422 chip is selected MAX3491/MAX3491E, it is that 24V turns 5V's that described power supply is selected LM2575() and LM1117-33(5V turn 3V's).
The course of work of this example: during use, connect after direct current 24V power supply, audio input signal enters sound card chip by operational amplifier, sound card chip sends signal to arm processor, after arm processor is processed, sound card chip signal output is to power amplifier and operational amplifier, by the wire jumper being connected with operational amplifier with power amplifier, can select power amplifier output or isolation audio frequency to export, when selecting power amplifier output, this unit can be used as monitoring unit and uses, when selecting the output of isolation audio frequency, this unit can be used as general audio frequency output.
Signal on Serial Port Line enters arm processor through RS422 chip, and arm processor output signal is to network card chip, and network card chip output signal is to network interface.Wire jumper on Serial Port Line can be used to select the working method of serial ports, has two kinds of forms of RS422 or RS485.When selecting RS485 form, R+/R-is order wire, and T-is empty, and T+ can jumper connection be IRQ line.When data-switching for noise measuring, serial communication port is RS485 mode.This serial ports controller can be used for the different interfaces such as Auto broadcast, master control, cross complaint, noise measuring, need write corresponding software according to application purpose.
Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalization variations of doing according to the utility model application range and improvement etc., within all should still belonging to patent covering scope of the present utility model.
Claims (6)
1. a serial ports controller, it is characterized in that: comprise power supply, arm processor and Serial Port Line, described Serial Port Line R+, R-, T+ is connected with RS422 chip respectively with T-, described arm processor respectively with RS422 chip, network card chip, sound card chip is connected with working indicating, described network card chip is connected with network interface, the input end of described sound card chip is connected with the output terminal of operational amplifier, on described operational amplifier, be parallel with adjustable resistance, the output terminal of described sound card chip is connected with the input end of operational amplifier and power amplifier respectively, the output terminal of described operational amplifier and power amplifier is connected with audio output control device, described audio output control device output audio signal, described arm processor is connected with the base stage of triode Q1 by resistance, the grounded emitter of described triode Q1, the collector of described triode Q1 divides two-way, one tunnel is connected with Serial Port Line T+, another road is connected with the negative electrode of diode D1, the anode of described diode D1 is connected with the negative electrode of diode D2, the anode of described diode D2 passes through resistance eutral grounding, described arm processor is also connected with the collector of triode Q2, the grounded emitter of described triode Q2, described triode Q2 is in parallel with a resistor.
2. a kind of serial ports controller according to claim 1, is characterized in that: described audio output control device is two wire jumpers that are connected with operational amplifier and two wire jumpers that are connected with power amplifier.
3. a kind of serial ports controller according to claim 1, it is characterized in that: described Serial Port Line T+ and described RS422 chip chamber are provided with wire jumper, between described Serial Port Line T+ and Serial Port Line R+, be provided with wire jumper, between described Serial Port Line T-and Serial Port Line R-, be provided with wire jumper, between described Serial Port Line T+ and the negative electrode of diode D1, be provided with wire jumper.
4. a kind of serial ports controller according to claim 1, is characterized in that: described arm processor is LPC1768, and described network card chip is DP83848, and described sound card chip is UDA1341.
5. a kind of serial ports controller according to claim 1, is characterized in that: described RS422 chip is MAX3491/MAX3491E.
6. a kind of serial ports controller according to claim 1, is characterized in that: described power supply is selected LM2575 and LM1117-33.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499996.6U CN203405812U (en) | 2013-08-15 | 2013-08-15 | Serial communication controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499996.6U CN203405812U (en) | 2013-08-15 | 2013-08-15 | Serial communication controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203405812U true CN203405812U (en) | 2014-01-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320499996.6U Expired - Lifetime CN203405812U (en) | 2013-08-15 | 2013-08-15 | Serial communication controller |
Country Status (1)
| Country | Link |
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| CN (1) | CN203405812U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399838A (en) * | 2013-08-15 | 2013-11-20 | 天津市北海通信技术有限公司 | Serial port controller |
| CN106506025A (en) * | 2016-12-29 | 2017-03-15 | 帝信科技股份有限公司 | SIP intercoms |
-
2013
- 2013-08-15 CN CN201320499996.6U patent/CN203405812U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399838A (en) * | 2013-08-15 | 2013-11-20 | 天津市北海通信技术有限公司 | Serial port controller |
| CN103399838B (en) * | 2013-08-15 | 2016-08-10 | 天津市北海通信技术有限公司 | A kind of serial ports controller |
| CN106506025A (en) * | 2016-12-29 | 2017-03-15 | 帝信科技股份有限公司 | SIP intercoms |
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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 |
Granted publication date: 20140122 |
|
| CX01 | Expiry of patent term |