CN201628861U - Bus transmission system - Google Patents
Bus transmission system Download PDFInfo
- Publication number
- CN201628861U CN201628861U CN2010201297012U CN201020129701U CN201628861U CN 201628861 U CN201628861 U CN 201628861U CN 2010201297012 U CN2010201297012 U CN 2010201297012U CN 201020129701 U CN201020129701 U CN 201020129701U CN 201628861 U CN201628861 U CN 201628861U
- Authority
- CN
- China
- Prior art keywords
- bus
- transmission line
- controller
- terminal device
- bus controller
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Small-Scale Networks (AREA)
- Selective Calling Equipment (AREA)
Abstract
The utility model relates to a power bus transmission system. Aiming at the defects of complex structure, high cost and incapability of providing the working current by a transmission line of the bus transmission system in the prior art, the utility model discloses a bus transmission system. A controller can provides the working current for terminal equipment by the transmission line without a dedicated power supply transmission route so as to reduce the cost of the system. The technical scheme of the utility model is that the bus transmission system comprises the bus controller and the terminal equipment connected with the bus controller by the transmission line; the bus controller comprises a central processing unit, a bus encoder, a bus decoder and a driving circuit; the central processing unit receives a code return signal of the terminal equipment by the bus decoder; the central processing unit sends a control signal to the terminal equipment by the bus encoder and the driving circuit sequentially; and the driving circuit is connected with a power supply to provide the working current for the terminal equipment by the transmission line. The bus transmission system is mainly used for remote transmission of data.
Description
Technical field
The utility model relates to data transmission technology, particularly a kind of power bus transmission system.
Background technology
Bus transfer is a kind of technology of data long-distance transmissions, uses general in fields such as Industry Control, data communication.More common in the prior art have RS-232, a RS-485/422 etc.The bus transfer system architecture of prior art, the terminal device that generally comprises bus controller and be connected with bus controller by transmission line (or being called bus).Bus controller transmits control signal to terminal device by transmission line, and time coded signal of receiving terminal apparatus, and terminal device receives the control signal that bus controller sends by transmission line, and transmits back coded signal to bus controller.In these bus transfer systems, bus controller and terminal device generally all adopt special-purpose codec chip, and bus controller provides working current to terminal device if desired, generally also need to arrange special-purpose power supply transmission line.The bus transfer system architecture complexity of prior art, cost height, can not provide the shortcoming of working current, its range of application is restricted, be not suitable for the application of some special occasions by transmission line.
The utility model content
Technical problem to be solved in the utility model is exactly the above-mentioned shortcoming at the bus transfer system of prior art, and a kind of bus transfer system is provided, and reduces system cost, and provides working current by transmission line to terminal device.
The utility model solve the technical problem, the technical scheme that adopts is, a kind of bus transfer system, comprise bus controller and the terminal device that is connected with bus controller by transmission line thereof, described bus controller transmits control signal to terminal device by transmission line, time coded signal of receiving terminal apparatus; Described terminal device receives the control signal that bus controller sends by transmission line, transmits back coded signal to bus controller; It is characterized in that, described bus controller comprises CPU (central processing unit), bus code device, bus encoder/decoder and driving circuit, described CPU (central processing unit) is by the coded signal that returns of bus encoder/decoder receiving terminal apparatus, described CPU (central processing unit) order transmits control signal to terminal device by bus code device, driving circuit, described driving circuit is connected with power supply, provides working current by transmission line to terminal device;
Further, described bus controller also comprises holding circuit, and described holding circuit is connected between transmission line and the bus controller;
Concrete, described holding circuit is made of input protection circuit and output protection circuit;
Concrete, described input protection circuit is made of first resistance, second resistance and the second transition diode, and described first resistance string is associated on the transmission line, the described second transition diode anode ground connection, negative electrode connects transmission line, and described second resistance is in parallel with the second transition diode; Described output protection circuit is made of the restrictor and the first transition diode, and described restrictor is connected on the transmission line, the described first transition diode anode ground connection, and negative electrode connects transmission line;
Concrete, described terminal device is a gas detector;
Concrete, described gas detector comprises controller, codec and detector power supply, described codec connects transmission line, and received signal and transmission signals, described controller is connected with codec; The detector power supply connects transmission line, receives the electric current of transmission line;
Concrete, described driving circuit is made of middle pliotron, isolating diode and biasing resistor; The pliotron base stage connects the isolating diode negative electrode in described; Described isolating diode anode is connected with the bus code device; Described biasing resistor one termination is from diode anode, and an end is connected with power supply with middle pliotron collector; The pliotron emitter connects transmission line in described.
The beneficial effects of the utility model are, bus controller can provide working current to terminal device by transmission line, need not special-purpose power supply transmission line, reduced system cost.The bus transfer system communication bit error rate of the present utility model is low, and data transmission is reliable, and transmission line can adopt common copper core, and transmission range can reach 2.7km.
Description of drawings
Fig. 1 is the system architecture synoptic diagram of embodiment;
Fig. 2 is a signal transmission synoptic diagram;
Fig. 3 is a bus code device structural representation;
Fig. 4 is the driving circuit structure synoptic diagram;
Fig. 5 is the bus encoder/decoder structural representation;
Fig. 6 is the holding circuit structural representation;
Fig. 7 is the codec structure synoptic diagram.
Embodiment
Below in conjunction with drawings and Examples, describe the technical solution of the utility model in detail.
Bus transfer of the present utility model system, be mainly used in the remote data transmission of bus controller and terminal device, this bus transfer system adopts principal and subordinate's control mode, realize the real time data communication between bus controller and the terminal device, and can be terminal device certain working current is provided, realize bus-powered.
Embodiment
This example as terminal device, is described the technical scheme of bus transfer system with gas detector.This routine bus transfer system comprises bus controller and other detectors that are connected with bus controller by transmission line thereof, as shown in Figure 1.This routine bus controller comprises CPU (central processing unit), bus code device, bus encoder/decoder and driving circuit.The control signal of CPU (central processing unit) output converts control code to through the bus code device, isolates, amplifies to the gas detector transmission control code that is connected on the transmission line, referring to Fig. 2 by driving circuit then.This routine driving circuit also is connected with power supply, can provide working current to gas detector by transmission line.In order to protect bus controller, improve the reliability of transmission system, this routine bus controller also comprises holding circuit, the input/output signal of bus controller all transmits by holding circuit.
The main circuit that describes below in the bus transfer system constitutes.
This routine bus code device structure is seen Fig. 3.U5 is that logic reversal device, D4 are voltage stabilizing diode.The control signal of CPU (central processing unit) output is finished coding through phase inverter U5 and voltage stabilizing diode D4, realizes level conversion.
This routine driving circuit is made of middle pliotron V4, isolating diode D7, biasing resistor R24, as shown in Figure 4.Middle pliotron V4 base stage connects isolating diode D7 negative electrode, isolating diode D7 anode is connected (negative electrode that is voltage stabilizing diode D4 among Fig. 3) with the bus code device, biasing resistor R24 one termination is from diode D7 anode, one end is connected with power supply with middle pliotron V4 collector,, middle pliotron V4 emitter connects transmission line.This circuit is that power is penetrated with circuit, except sending to transmission line the respective bus coded signal, can also provide certain working current to gas detector by middle pliotron V4, the gas detector that is connected on the transmission line can pass through the transmission line power taking, satisfies self work requirements.
This routine bus encoder/decoder circuit structure as shown in Figure 5, time coded signal that gas detector sends by transmission line, decode to returning coded signal by resistance R 17 input optocoupler U6, decoded signal transmits back code data through the waveform shaping circuit that resistance R 16, R19, triode V1 and resistance R 15 constitute to CPU (central processing unit).
Fig. 6 shows this routine holding circuit structural representation, comprises output protection circuit and input protection circuit two partly.Input protection circuit is made of first resistance R 29, second resistance R 30 and the second transition diode D12.First resistance R 29 is connected on the transmission line, the second transition diode D12 plus earth, and negative electrode connects transmission line, and second resistance R 30 is in parallel with the second transition diode D12.Output protection circuit is made of the restrictor F3 and the first transition diode D11, and restrictor F3 is connected on the transmission line, the first transition diode D11 plus earth, and negative electrode connects transmission line.In this routine holding circuit; restrictor F3 is used for overcurrent protection; when the electric current of transmission line surpasses protection domain; automatically cut off transmission line; avoid bus short circuit, gas detector failure and other reasons to damage the bus transfer system, the first transition diode D11 is used to suppress the transient high voltages pulse that output terminal is introduced.In the input protection circuit, first resistance R 29 suppresses resistance for input current-limiting resistance, second resistance R 30 for level, and the second transition diode D12 provides electric protection from transients.The bus controller output signal outputs on the transmission line behind the F3 current protection; the bus signals of certain power is provided; and suppress outside ringing pulse; the signal of input bus controller is through resistance R 29 current limlitings; after resistance R 30 level suppress; be converted to safety level, and suppress electric ringing pulse, be input to bus encoder/decoder and return the sign indicating number parsing by the second transition diode D12.
This routine gas detector comprises controller, codec and detector power supply, referring to Fig. 2.Codec connects transmission line, received signal and transmission signals, and controller is connected with codec, receives the control signal of codec output, and transmits back coded signal to codec.Return coded signal through coding, send on the transmission line.This routine detector power supply also connects transmission line, by the transmission line received current, is the gas detector power supply.
Codec circuit structure among Fig. 2 as shown in Figure 7.This circuit returns sign indicating number three by the rectification of detector bus, the decoding of detector synchronizing pulse, detector data decoding, detector bus and partly forms, inductance L 3 constitutes detector bus rectification circuit, reduce bus and disturb, and do not influence the bus data decoding when guaranteeing detector from the transmission line power taking.Diode D5, resistance R 8, capacitor C 13, resistance R 11, triode V2 and resistance R 6 constitute detector bus clock decoding circuit, export the synchronous clock pulse signal by triode V2 collector to controller.Diode D3, resistance R 9, R12, capacitor C 14 triode V1 and resistance R 5 constitute detector bus data decoding circuit, imitate data-signal by triode V1 collector to controller output.Resistance R 4, R10, photoelectrical coupler U3 and diode D2 constitute the detector bus and return decoding circuit, finish detector and return the code data loading to bus.Diode D5 is a synchronizing pulse thresholding diode, and triode V2 is a synchronizing pulse decoding triode, by triode V2, obtains the synchronization pulse anti-phase with bus.Triode V1 is the data decode triode, obtains the data-signal anti-phase with bus, and photoelectrical coupler U3 is back a sign indicating number coupling mechanism, is that bus is returned coded signal and sent on the transmission line by diode D2 with the logic control level conversion of controller input.
Bus transfer of the present utility model system adopts simple phase inverter, photoelectrical coupler and some discrete devices just can finish.The physical circuit of the foregoing description only is used to illustrate the utility model, does not represent qualification of the present utility model.Those skilled in the art can adopt other circuit to realize that it all belongs to protection domain of the present utility model according to foregoing description.
Claims (7)
1. a bus transfer system comprises bus controller and the terminal device that is connected with bus controller by transmission line thereof, and described bus controller transmits control signal to terminal device by transmission line, time coded signal of receiving terminal apparatus; Described terminal device receives the control signal that bus controller sends by transmission line, transmits back coded signal to bus controller; It is characterized in that, described bus controller comprises CPU (central processing unit), bus code device, bus encoder/decoder and driving circuit, described CPU (central processing unit) is by the coded signal that returns of bus encoder/decoder receiving terminal apparatus, described CPU (central processing unit) order transmits control signal to terminal device by bus code device, driving circuit, described driving circuit is connected with power supply, provides working current by transmission line to terminal device.
2. a kind of bus transfer according to claim 1 system is characterized in that described bus controller also comprises holding circuit, and described holding circuit is connected between transmission line and the bus controller.
3. a kind of bus transfer according to claim 2 system is characterized in that described holding circuit is made of input protection circuit and output protection circuit.
4. a kind of bus transfer according to claim 3 system, it is characterized in that, described input protection circuit is made of first resistance, second resistance and the second transition diode, described first resistance string is associated on the transmission line, the described second transition diode anode ground connection, negative electrode connects transmission line, and described second resistance is in parallel with the second transition diode; Described output protection circuit is made of the restrictor and the first transition diode, and described restrictor is connected on the transmission line, the described first transition diode anode ground connection, and negative electrode connects transmission line.
5. according to any described a kind of bus transfer system of claim 1～4, it is characterized in that described terminal device is a gas detector.
6. a kind of bus transfer according to claim 5 system, it is characterized in that described gas detector comprises controller, codec and detector power supply, described codec connects transmission line, received signal and transmission signals, described controller is connected with codec; The detector power supply connects transmission line, receives the electric current of transmission line.
7. a kind of bus transfer according to claim 6 system is characterized in that described driving circuit is made of middle pliotron, isolating diode and biasing resistor; The pliotron base stage connects the isolating diode negative electrode in described; Described isolating diode anode is connected with the bus code device; Described biasing resistor one termination isolating diode anode, an end is connected with power supply with middle pliotron collector; The pliotron emitter connects transmission line in described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201297012U CN201628861U (en) | 2010-03-12 | 2010-03-12 | Bus transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201297012U CN201628861U (en) | 2010-03-12 | 2010-03-12 | Bus transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201628861U true CN201628861U (en) | 2010-11-10 |
Family
ID=43060257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201297012U Expired - Lifetime CN201628861U (en) | 2010-03-12 | 2010-03-12 | Bus transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201628861U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223275A (en) * | 2011-06-24 | 2011-10-19 | 浙江亚卫通科技有限公司 | Long-distance communication bus |
| CN105178769A (en) * | 2015-09-06 | 2015-12-23 | 深圳市泛海三江电子有限公司 | Bus type control device and monitoring system for electric door closer |
| CN106936423A (en) * | 2015-12-29 | 2017-07-07 | 柳州桂通科技股份有限公司 | Operational amplifier, driving interface, measuring and controlling equipment, drive circuit and driver |
| CN111581145A (en) * | 2020-04-14 | 2020-08-25 | 北京旋极信息技术股份有限公司 | Bus communication system and method |
-
2010
- 2010-03-12 CN CN2010201297012U patent/CN201628861U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102223275A (en) * | 2011-06-24 | 2011-10-19 | 浙江亚卫通科技有限公司 | Long-distance communication bus |
| CN102223275B (en) * | 2011-06-24 | 2014-05-07 | 浙江亚卫通科技有限公司 | Long-distance communication bus |
| CN105178769A (en) * | 2015-09-06 | 2015-12-23 | 深圳市泛海三江电子有限公司 | Bus type control device and monitoring system for electric door closer |
| CN106936423A (en) * | 2015-12-29 | 2017-07-07 | 柳州桂通科技股份有限公司 | Operational amplifier, driving interface, measuring and controlling equipment, drive circuit and driver |
| CN111581145A (en) * | 2020-04-14 | 2020-08-25 | 北京旋极信息技术股份有限公司 | Bus communication system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201628861U (en) | Bus transmission system | |
| CN102427353B (en) | A kind of IGBT series valve triggers monitoring system and communication means thereof | |
| CN101761334B (en) | Logging telemetry communication device | |
| CN110943762A (en) | Direct-current power line carrier communication method based on differential Manchester coding and air conditioner | |
| CN205302279U (en) | Serial interface data protocol converter | |
| CN103294629A (en) | Interface switching circuit and device | |
| CN202383491U (en) | Slave power supply and valve control circuit of M-BUS | |
| CN103199865B (en) | A kind of light adaptive serial port decoding circuit | |
| CN201732158U (en) | Self-checking device | |
| CN104077260B (en) | A kind of concentrator M BUS host communication interface arrangements | |
| CN203135884U (en) | Relay-protection multi-communication intelligent switching device | |
| CN103117804B (en) | A kind of multichannel communication method between power cable checkout gear and harvester | |
| CN103401747B (en) | A kind of distributed floating controller Local network communication system | |
| CN201656952U (en) | Sampling isolation circuit for analog signal | |
| CN203135425U (en) | Self-adaption multi-communication-mode intelligent switching device compatible to different protection manufacturers | |
| CN201574750U (en) | Logging ground and downhole signal two-way transmission circuit | |
| CN203632640U (en) | Two-way transmission interface converting circuit | |
| CN211481285U (en) | Bus isolation transmission and protection system | |
| CN202143048U (en) | Encoder converting circuit | |
| CN205070989U (en) | Follow quick -witted transceiver, receiving and dispatching system and follow quick -witted receiving and dispatching system | |
| CN201574749U (en) | Logging ground or downhole signal receiving circuit | |
| CN203596816U (en) | BCH coding and decoding circuit | |
| CN204947713U (en) | A kind of transforming plant lead-in backup auto-activating device | |
| CN201818301U (en) | Logging ground or underground signal transmission circuit | |
| CN204304421U (en) | The protective circuit of underground coal mine RS485 communication line |
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: 20101110 |