CN102790648A - Signal receiving and transmitting device and communication method thereof - Google Patents
Signal receiving and transmitting device and communication method thereof Download PDFInfo
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- CN102790648A CN102790648A CN2011101325064A CN201110132506A CN102790648A CN 102790648 A CN102790648 A CN 102790648A CN 2011101325064 A CN2011101325064 A CN 2011101325064A CN 201110132506 A CN201110132506 A CN 201110132506A CN 102790648 A CN102790648 A CN 102790648A
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Abstract
The invention discloses a signal receiving and transmitting device and a communication method thereof. The signal receiving and transmitting device comprises a plurality of signal level converters, a parallel/serial converter, a coding/decoding device, a modulation/demodulation device and a photoelectric converter, wherein the plurality of signal level converters convert RS232 level signals into transistor-transistor logic (TTL)/complementary metal oxide semiconductor (COMS) level signals and transmit the COMS level signals to a central processing unit (CPU) to perform data coding and modulation; the parallel/serial converter is used for converting a plurality of level signals into one information stream in the transmitting process of the data and converting one information stream into the plurality of level signals in the receiving process; the coding/decoding device is used for coding one information stream into a plurality of code blocks in the transmitting process and decoding the plurality of code blocks into one information stream in the receiving process; the modulation/demodulation device is used for modulating the plurality of code blocks into a plurality of high-order modulation symbols or demodulating the plurality of high-order modulation symbols into the plurality of code blocks; and the photoelectric converter is used for converting the high-order modulation symbols into optical signals and then transmitting the optical signals. By means of the signal receiving and transmitting device and the communication method of the signal receiving and transmitting device, long-distance optical fiber communication among universal asynchronous receivers/transmitters (UARTs) can be achieved, antijamming capability is enhanced, and communication quality is improved.
Description
Technical field
The present invention relates to a kind of signal transmission and reception apparatus and communication means thereof; Particularly relate to a kind of signal transmission and reception apparatus and the communication means thereof that can realize remote optical fiber communication between UART (Universal Asynchronous Receiver/Transmitter, the promptly universal asynchronous reception/dispensing device) port.
Background technology
Along with the continuous development of industrial circle, the interconnection of equipment, increasingly high to the transfer of data requirement, transmission range is more and more longer, data amount transmitted is increasing.Common UART transmits through cable, and transmission range is short, cost is high, receive the interference of external environment can not guarantee the time performance and the correctness of data easily.
The signal of UART transmission is generally the RS232/RS422/RS485 level signal, and with regard to the RS232 level signal, logical one is-5--15V; Logical zero is+5-+15V that noise margin is 2V.Promptly require receiver to discern to be low to moderate+signal of 3V is as logical zero, and high signal to-3V is as logical one.Because its common mode inhibition capacity is poor, adds the distributed capacitance on the twisted-pair feeder, its transmitting range is about 15 meters to the maximum, and flank speed is 20kb/s, so RS-232 only is fit to the communication between the local device.
Electronic applications also has another kind of level signal, i.e. TTL (Transistor-Transistor Logic, i.e. transistor-transistor logic integrated circuit) level signal commonly used.The Transistor-Transistor Logic level signal is very desirable for the transfer of data of the device interior of computer processor control; At first the transfer of data of the device interior of computer processor control is also lower for the less demanding and thermal losses of power supply, and the Transistor-Transistor Logic level signal directly is connected with integrated circuit and does not need expensive line driver and acceptor circuit in addition; Moreover the transfer of data of the device interior of computer processor control is carried out under at a high speed, and the operation of TTL interface be able to meet this requirement.The communication of TTL type be to adopt the parallel data transmission means, and the parallel data transmission just has been not suitable for for the distance that surpasses 10 feet in most cases.This is the reason owing to reliability and cost two sides.Because in parallel interface, exist inclined to one side phase and asymmetric problem, these problems are all influential to reliability.
TTL mainly contains 54/74 series standard TTL, high-speed type TTL (H-TTL), low-power consumption type TTL (L-TTL), Schottky type TTL (S-TTL), five series of low-power consumption Schottky type TTL (LS-TTL).The minimum 2V of standard TTL input high level (being logical one), the minimum 2.4V of output high level, representative value 3.4V, the maximum 0.8V of input low level (being logical zero), the maximum 0.4V of output low level, representative value 0.2V.The minimum 2V of S-TTL input high level, the minimum I class of output high level 2.5V, II, III class 2.7V, representative value 3.4V, the maximum 0.8V of input low level, the maximum 0.5V of output low level.The minimum 2V of LS-TTL input high level, the minimum I class of output high level 2.5V, II, III class 2.7V, representative value 3.4V, the maximum I class of input low level 0.7V, II, III class 0.8V, the maximum I class of output low level 0.4V, II, III class 0.5V, representative value 0.25V.
With also have a kind of CMOS (Complementary metal-oxide-semiconductor, i.e. complementary metal oxide semiconductors (CMOS)) level signal like the Transistor-Transistor Logic level class signal.Cmos circuit output high level (being logical one) is about 0.9*Vcc, and output low level (being logical zero) is about 0.1*Vcc, and wherein, Vcc is generally 12V, so the CMOS level signal has very wide noise margin, antijamming capability is also strong than TTL.
Yet, in the prior art, no matter be to use any level signal in above three kinds, all also there is not to realize remote two-forty ground method for communicating between the UART port.
Summary of the invention
The technical problem that the present invention will solve is can't two-forty to transmit the defective of multichannel UART signal at a distance simultaneously in order to overcome prior art, and the signal transmission and reception apparatus and the communication means thereof of remote optical fiber communication between a kind of UART of realization port is provided.
The present invention solves above-mentioned technical problem through following technical proposals: a kind of signal transmission and reception apparatus; It is characterized in that; Said signal transmission and reception apparatus comprises: a plurality of signal level converters convert multichannel RS232 level signal to the TTL/COMS level signal and send into coding, the modulation that CPU carries out data; One parallel/serial transducer is used for converting multi-channel electric signal into one road information flow in the process of transmitting of data, in receiving course, one road information flow is changed to multi-channel electric signal; One coder/decoder is used for one road information flow is encoded to a plurality of code blocks in data transmission procedure, in receiving course, a plurality of code blocks is decoded as one road information flow; One modulator/demodulator is used for a plurality of code blocks are modulated to a plurality of high order modulation symbols, or is a plurality of code blocks with a plurality of high order modulation symbol demodulations; One optical-electrical converter, being used for a plurality of high order modulation symbol transition is to send behind the light signal, or receiving optical signals and convert said light signal into a plurality of high order modulation symbols
Preferably, said signal level converter is used for the mutual conversion between RS232 level and the Transistor-Transistor Logic level.
Preferably, said signal level converter is used for the mutual conversion between RS232 level and the CMOS level.
Preferably, it is one road information flow that said parallel/serial transducer is used for 4～8 tunnel electrical signal conversion, or one road information flow is changed to 4～8 road signals of telecommunication.
Preferably, it is one road information flow that said parallel/serial transducer is used for 8 tunnel electrical signal conversion, or one road information flow is changed to 8 road signals of telecommunication.
The present invention also provides a kind of communication means, it is characterized in that, said communication means may further comprise the steps: the first step receives multiple signals, and is Transistor-Transistor Logic level with the logic level of said multiple signals by the RS232 level conversion; In second step, convert said multiple signals into one road information flow; In the 3rd step, said one road information flow is encoded to a plurality of code blocks; In the 4th step, said a plurality of code blocks are modulated into a plurality of high order modulation symbols; In the 5th step, said a plurality of high order modulation symbol transition are light signal and send.
Preferably, the said first step does, receives multiple signals, and is the CMOS level with the logic level of said multiple signals by the RS232 level conversion.
Preferably, the quantitative range of the multiple signals of the said first step and the said multiple signals in said second step is 4～8 the tunnel.
Preferably, the quantity of the multiple signals of the said first step and the said multiple signals in said second step is 8 the tunnel.
The present invention also provides a kind of communication means, it is characterized in that, said communication means may further comprise the steps: the first step, and receiving optical signals, and said light signal converted into a plurality of high order modulation symbols of electrical signal component; Second step was a plurality of code blocks with said a plurality of high order modulation symbol demodulations; In the 3rd step, said a plurality of code blocks are decoded as one road information flow; In the 4th step, said one road information flow is changed to multichannel TTL logic level signal; In the 5th step, convert the logic level of said multiple signals into the RS232 level by Transistor-Transistor Logic level, and export said multiple signals.
Preferably, said the 5th step is to be the RS232 level with the logic level of said multiple signals by the CMOS level conversion, and to export said multiple signals.
Preferably, the multiple signals in said the 4th step and the said multiple signals quantitative range in said the 5th step are 4～8 the tunnel.
Preferably, the quantity of the multiple signals in said the 4th step and the said multiple signals in the 5th step is 8 the tunnel.
Positive progressive effect of the present invention is: through signal transmission and reception apparatus of the present invention and communication means thereof, can realize the remote optical fiber communication of UART port, strengthen antijamming capability, improve communication quality.In addition, signal transmission and reception apparatus of the present invention is through string and conversion and coding, and transmission has improved utilization of network bandwidth when having realized multiple signals.Signal transmission and reception apparatus of the present invention has utilized also that optical fiber communication speed is high, transmission range is long and characteristic such as cost is low, is applicable to interconnection and networking between the industrial communication equipment, can carry out point-to-point, the single-point networking mode to multiple spot.
Description of drawings
Fig. 1 is the module diagram of the signal transmission and reception apparatus of preferred embodiment of the present invention.
Fig. 2 is the detailed maps of the input and output of PHY_IC module among Fig. 1.
Fig. 3 is the detailed module diagram of optical-electrical converter among Fig. 1.
The module diagram of Fig. 4 for communicating by letter between the signal transmission and reception apparatus of preferred embodiment of the present invention.
Fig. 5 is the flow chart of a kind of communication means of preferred embodiment of the present invention.
Fig. 6 is the flow chart of the another kind of communication means of preferred embodiment of the present invention.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to specify technical scheme of the present invention.In Figure of description, the element with similar structures or function will be used the components identical symbolic representation.Accompanying drawing is not to carry out the explanation of exhaustive to the present invention just for the ease of each embodiment of the present invention is described, neither limit scope of the present invention.
According to a preferred embodiment of the present invention; A kind of signal transmission and reception apparatus 100 comprises (as shown in Figure 1): a plurality of signal level converter 111-118; Be respectively applied for input one road signal of telecommunication, and the logic level of changing said one road signal of telecommunication is exported said one road signal of telecommunication then; One parallel/serial transducer 120 is used for converting multi-channel electric signal into one road information flow, or one road information flow is changed to multi-channel electric signal; One coder/decoder 130 is used for one road information flow is encoded to a plurality of code blocks or a plurality of code blocks are decoded as one road information flow; One modulator/demodulator 140 is used for a plurality of code blocks are modulated to a plurality of high order modulation symbols, or is a plurality of code blocks with a plurality of high order modulation symbol demodulations; One optical-electrical converter 150, being used for a plurality of high order modulation symbol transition is to send behind the light signal, or receiving optical signals and convert said light signal into a plurality of high order modulation symbols.Said coder/decoder 130 all can be by existing techniques in realizing, so repeat no more at this with said modulator/demodulator 140.
In a preferred embodiment, said signal level converter 111-118 is used for the mutual conversion between RS232 level and Transistor-Transistor Logic level or RS232 level and the CMOS level.As shown in Figure 2; There are two interfaces in said signal level converter 110 left sides; Be connected with UART port 210; One of them is used for receiving the RS232 level signal from said UART port 210, and another is used for the RS232 level signal that is converted by the TTL/CMOS level signal is exported to said UART port 210.Also there are two interfaces on said level translator 110 right sides; One is used for the TTL/CMOS level signal that is converted by the RS232 level signal is exported to said coder/decoder 120, and another is used for receiving the TTL/CMOS level signal from said coder/decoder 120.Preferably, the said signal level converter 111-118 SN75176 chip that can be Texas Instrument.
In a preferred embodiment, said parallel/serial transducer 120 can be one road information flow with 4～8 tunnel electrical signal conversion, or one road information flow is changed to 4～8 road signals of telecommunication.In another preferred embodiment, said parallel/serial transducer 120 can be one road information flow with 8 tunnel electrical signal conversion, or one road information flow is changed to 8 road signals of telecommunication.Said parallel/serial transducer 120 can be by existing techniques in realizing, so repeat no more at this.
In a preferred embodiment, said optical-electrical converter 150 is divided into inner sending module and inner receiver module.Wherein, said inner sending module comprises: a data buffer 311, a laser modulator 320, a Temperature Detector 330, a laser driver 340 and a generating laser 350; Said inner receiver module comprises: two data buffers 312 and 313, one electric signal amplifier 360, a signal sensor 370, a low pass filter 380 and an optical receiver 390.Preferably, said optical-electrical converter 150 can be the RTXM 144TL Transistor-Transistor Logic level optical module of Wuhan photoelectricity company, transmission rate 64M.
In a preferred embodiment, the UART port uses said signal transmission and reception apparatus 100 to realize that the structure of optical fiber communication is as shown in Figure 4: an end is 8 data collecting device 411-418, is connected with a said signal transmission and reception apparatus 101; The other end is 8 data receiving terminal 421-428, also is connected with a said signal transmission and reception apparatus 102.Wherein, said signal transmission and reception apparatus 101 is connected through optical fiber with 102.More specifically, the transmitting terminal of said signal transmission and reception apparatus 101 directly is connected through optical fiber with the transmitting terminal of said signal transmission and reception apparatus 102 with the receiving terminal of the receiving terminal of said signal transmission and reception apparatus 102, said signal transmission and reception apparatus 101.Thus, said signal transmission and reception apparatus 101 and 102 can receive and send light signal simultaneously and communicate, promptly with the pattern communication of full duplex.
Shown in Figure 5 for the communication means of a preferred embodiment of the present invention; Said communication means may further comprise the steps: step 510; Said signal level converter 111-118 receives multiple signals, and is Transistor-Transistor Logic level with the logic level of said multiple signals by the RS232 level conversion; Step 520, said parallel/serial transducer 120 converts said multiple signals into one road information flow; Step 530, said coder/decoder 130 is encoded to a plurality of code blocks with said one road information flow; Step 540, said modulator/demodulator 140 is modulated into a plurality of high order modulation symbols with said a plurality of code blocks; Step 550, said optical-electrical converter 150 are light signal with said a plurality of high order modulation symbol transition and send.Said step 510 also can for: said signal level converter 111-118 receives multiple signals, and is the CMOS level with the logic level of said multiple signals by the RS232 level conversion.
In a preferred embodiment, the quantitative range of the multiple signals of said step 510 and the said multiple signals of said step 520 is 4～8 the tunnel.Preferably, the quantity of the said multiple signals of the multiple signals of said step 510 and said step 520 also can be 8 the tunnel.
Shown in Figure 6ly be the communication means of a preferred embodiment of the present invention, said communication means may further comprise the steps: step 610, and said optical-electrical converter 150 receiving optical signals, and convert said light signal into a plurality of high order modulation symbols; Step 620, said modulator/demodulator 140 is a plurality of code blocks with said a plurality of high order modulation symbol demodulations; Step 630, said coder/decoder 130 is decoded as one road information flow with said a plurality of code blocks; Step 640, said parallel/serial transducer 120 is changed to multiple signals with said one road information flow; Step 650, said signal level converter 111-118 converts the logic level of said multiple signals into the RS232 level by Transistor-Transistor Logic level, and exports said multiple signals.Said step 650 also can for: is the RS232 level with the logic level of said multiple signals by the CMOS level conversion, and exports said multiple signals.
In another preferred embodiment, the said multiple signals quantitative range of the multiple signals of said step 640 and said step 650 is 4～8 the tunnel.Preferably, the quantity of the said multiple signals of the multiple signals of said step 640 and said step 650 also can be 8 the tunnel.
Though more than described embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited appended claims.Those skilled in the art can make numerous variations or modification to these execution modes under the prerequisite that does not deviate from principle of the present invention and essence, but these changes and modification all fall into protection scope of the present invention.
Claims (13)
1. a signal transmission and reception apparatus is characterized in that, said signal transmission and reception apparatus comprises:
A plurality of signal level converters convert multichannel RS232 level signal to the TTL/COMS level signal and send into coding, the modulation that CPU carries out data;
One parallel/serial transducer is used for converting multi-channel electric signal into one road information flow in the process of transmitting of data, in receiving course, one road information flow is changed to multi-channel electric signal;
One coder/decoder is used for one road information flow is encoded to a plurality of code blocks in the process of transmitting of data, in receiving course, a plurality of code blocks is decoded as one road information flow;
One modulator/demodulator is used for a plurality of code blocks are modulated to a plurality of high order modulation symbols, or is a plurality of code blocks with a plurality of high order modulation symbol demodulations;
One optical-electrical converter, being used for a plurality of high order modulation symbol transition is to send behind the light signal, or receiving optical signals and convert said light signal into a plurality of high order modulation symbols.
2. signal transmission and reception apparatus as claimed in claim 1 is characterized in that, said signal level converter is used for the mutual conversion between RS232 level and the Transistor-Transistor Logic level.
3. signal transmission and reception apparatus as claimed in claim 1 is characterized in that, said signal level converter is used for the mutual conversion between RS232 level and the CMOS level.
4. signal transmission and reception apparatus as claimed in claim 1 is characterized in that, it is one road information flow that said parallel/serial transducer is used for 4～8 tunnel electrical signal conversion, or one road information flow is changed to 4～8 road signals of telecommunication.
5. like at least one described signal transmission and reception apparatus among the claim 1-4, it is characterized in that it is one road information flow that said parallel/serial transducer is used for 8 tunnel electrical signal conversion, or one road information flow is changed to 8 road signals of telecommunication.
6. a communication means is characterized in that, said communication means may further comprise the steps:
The first step receives multiple signals, and is Transistor-Transistor Logic level with the logic level of said multiple signals by the RS232 level conversion;
In second step, convert said multiple signals into one road information flow;
In the 3rd step, said one road information flow is encoded to a plurality of code blocks;
In the 4th step, said a plurality of code blocks are modulated into a plurality of high order modulation symbols;
In the 5th step, said a plurality of high order modulation symbol transition are light signal and send.
7. communication means as claimed in claim 6 is characterized in that, the said first step does, receives multiple signals, and is the CMOS level with the logic level of said multiple signals by the RS232 level conversion.
8. like claim 6 or 7 described communication meanss, it is characterized in that the quantitative range of the multiple signals of the said first step and the said multiple signals in said second step is 4～8 the tunnel.
9. like claim 6 or 7 described communication meanss, it is characterized in that the quantity of the multiple signals of the said first step and the said multiple signals in said second step is 8 the tunnel.
10. a communication means is characterized in that, said communication means may further comprise the steps:
The first step, receiving optical signals, and said light signal converted into a plurality of high order modulation symbols of electrical signal component;
Second step was a plurality of code blocks with said a plurality of high order modulation symbol demodulations;
In the 3rd step, said a plurality of code blocks are decoded as one road information flow;
In the 4th step, said one road information flow is changed to multichannel TTL logic level signal;
In the 5th step, convert the logic level of said multiple signals into the RS232 level by Transistor-Transistor Logic level, and export said multiple signals.
11. communication means as claimed in claim 10 is characterized in that, said the 5th step is to be the RS232 level with the logic level of said multiple signals by the CMOS level conversion, and to export said multiple signals.
12., it is characterized in that the multiple signals in said the 4th step and the said multiple signals quantitative range in the 5th step are 4～8 the tunnel like claim 10 or 11 described communication meanss.
13., it is characterized in that the quantity of the multiple signals in said the 4th step and the said multiple signals in the 5th step is 8 the tunnel like claim 10 or 11 described communication meanss.
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| CN105721057A (en) * | 2014-12-19 | 2016-06-29 | 英特尔公司 | High performance optical repeater |
| JP2016533137A (en) * | 2013-09-16 | 2016-10-20 | ▲華▼▲為▼▲終▼端有限公司 | SIM card signal conversion method and signal conversion apparatus |
| CN106681197A (en) * | 2015-11-11 | 2017-05-17 | 中车大连电力牵引研发中心有限公司 | Electric locomotive traction controller state feedback device and system |
| CN107623546A (en) * | 2016-07-15 | 2018-01-23 | 海思光电子有限公司 | A kind of optical transmission module |
| WO2022082883A1 (en) * | 2020-10-19 | 2022-04-28 | 鹏城实验室 | Optical communication transmitter, optical communication receiver, and optical communication system |
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| JP2016533137A (en) * | 2013-09-16 | 2016-10-20 | ▲華▼▲為▼▲終▼端有限公司 | SIM card signal conversion method and signal conversion apparatus |
| US10142831B2 (en) | 2013-09-16 | 2018-11-27 | Huawei Device (Shenzhen) Co., Ltd. | SIM card signal conversion method and apparatus |
| CN105721057A (en) * | 2014-12-19 | 2016-06-29 | 英特尔公司 | High performance optical repeater |
| CN105721057B (en) * | 2014-12-19 | 2019-01-22 | 英特尔公司 | High-performance optical repeater |
| CN106681197A (en) * | 2015-11-11 | 2017-05-17 | 中车大连电力牵引研发中心有限公司 | Electric locomotive traction controller state feedback device and system |
| CN106681197B (en) * | 2015-11-11 | 2019-08-16 | 中车大连电力牵引研发中心有限公司 | Electric locomotive traction controller state feedback device and system |
| CN107623546A (en) * | 2016-07-15 | 2018-01-23 | 海思光电子有限公司 | A kind of optical transmission module |
| WO2022082883A1 (en) * | 2020-10-19 | 2022-04-28 | 鹏城实验室 | Optical communication transmitter, optical communication receiver, and optical communication system |
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Application publication date: 20121121 |