CN103354452B - Photo-coupler transmission system and signal transmission control method - Google Patents
Photo-coupler transmission system and signal transmission control method Download PDFInfo
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- CN103354452B CN103354452B CN201310234961.4A CN201310234961A CN103354452B CN 103354452 B CN103354452 B CN 103354452B CN 201310234961 A CN201310234961 A CN 201310234961A CN 103354452 B CN103354452 B CN 103354452B
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Abstract
A kind of data conversion system that digitized AC signal is executed with nonlinear data conversion is provided（100）.This non-linear data translation system（100）Including the input for receiving digitized AC signal, for the outfan of the signal through non-linear conversion for the output, and the processing system being coupled to this input and outfan（104）.This processing system（104）It is configured to receive this digitized AC signal；Predetermined transmission function is adopted to carry out non-linear conversion to generate the signal through non-linear conversion to this digitized AC signal；And by the signal transmission through non-linear conversion to outfan.
Description
The application is to enter the Application No. 200880130611.0 of National Phase in China on January 28th, 2011 and invent
The divisional application of the Chinese invention patent application of entitled " data conversion system and method ".
Technical field
The present invention relates to data conversion（translation）System and method, and more particularly, to execute non-linear
The data conversion system of data conversion and method.
Background technology
Photo-coupler is that one kind adopts light（light）Signal is communicated to the equipment of the second equipment from the first equipment.Thus
Photo-coupler can be used for providing the electrical isolation for example between specific components or circuit.Advantageously electrical isolation can be used for
Prevent assembly or circuit draws（drwaing）Excessive electric current.Electrical isolation can be further used for preventing the short circuit in equipment
Or other problems impact miscellaneous equipment.Therefore, photo-coupler is often used in isolation electrical equipment and/or circuit.
Adopt a kind of isolation applications in the case that equipment is located in explosive or hazardous environment.Photo-coupler can by with
To guarantee that equipment and will not can not draw excessive electric current, and therefore to avoid producing electric spark or lead on fire.
Photo-coupler has the disadvantage in that.The switching of photo-coupler（switching）Speed is relatively slow.As a result, photo-coupler
There is limited signaling（signaling）Bandwidth.Additionally, photo-coupler is a kind of inactive component, and do not execute any signal
Transmission controls or adjusts.
Content of the invention
In one aspect of the invention, a kind of data for digitized AC signal is executed with nonlinear data conversion turns
The system of changing includes：
Input, it is used for receiving digitized AC signal；
Outfan, it is used for the signal through non-linear conversion for the output；And
Processing system, it is coupled to described input and outfan and is configured to receive this digitized AC signal, adopts
With predetermined transmission function（transfer function）Non-linear conversion is carried out to generate through non-thread to this digitized AC signal
Property conversion signal, and by this signal transmission through non-linear conversion to outfan.
Preferably, this predetermined transmission function generates with regard to predetermined reference point the signal through non-linear conversion.
Preferably, this predetermined transmission function be configured to alternatively to compress or amplifier digital AC signal numeral
Value.
Preferably, this predetermined transmission function be configured to alternatively to compress with respect to the distance away from predetermined reference point or
The digital value of amplifier digital AC signal.
Preferably, this nonlinear data conversion actually phase information is saved in through in the signal of non-linear conversion.
Preferably, this nonlinear data is changed zero crossing（zero-crossing）Information is saved in through non-linear conversion
Signal in.
Preferably, the conversion of this nonlinear data actually reduces the signal bandwidth of the signal through non-linear conversion.
In one aspect of the invention, a kind of data transfer device for digitized AC signal includes：
Receive digitized AC signal；
Predetermined transmission function is adopted to carry out non-linear conversion to generate the letter through non-linear conversion to digitized AC signal
Number；And
Transmit this signal through non-linear conversion.
Preferably, this predetermined transmission function generates with regard to predetermined reference point the signal through non-linear conversion.
Preferably, this predetermined transmission function be configured to alternatively to compress or amplifier digital AC signal numeral
Value.
Preferably, this predetermined transmission function be configured to alternatively to compress with respect to the distance away from predetermined reference point or
The digital value of amplifier digital AC signal.
Preferably, this nonlinear data conversion actually phase information is saved in through in the signal of non-linear conversion.
Preferably, zero crossing information is saved in through in the signal of non-linear conversion for this nonlinear data conversion.
Preferably, the conversion of this nonlinear data actually reduces the signal bandwidth of the signal through non-linear conversion.
In one aspect of the invention, a kind of optocoupler for controlling the signal transmitting medium through photo-coupler to transmit
Clutch transmission system includes：
Photo-coupler；And
Controller, it is coupled in this photo-coupler and is configured to receive the transmission trial coming from the first equipment, really
Whether fixed second equipment is being transmitted through photo-coupler, determines and receives transmission attempts whether being in electricity（power-
up）The dead band period after generation（deadband period）Outside, and if the second equipment not being transmitted and
If the dead band period passes by, transmit from the first equipment through photo-coupler.
Preferably, this controller is further configured to, if the second equipment is being transmitted, postpones（hold
off）First equipment is transmitted through photo-coupler, till the second equipment has completed transmission.
Preferably, this controller is configured to, if transmission trial was in the period of dead band, the first equipment of postponing passes through
Photo-coupler is transmitted, till the dead band period passes by.
Preferably, photo-coupler transmission system includes at least two equipment being communicated through photo-coupler.
Preferably, photo-coupler transmission system implements principal and subordinate（master-slave）Communication plan.
In one aspect of the invention, a kind of transmission for controlling the signal transmitting medium through photo-coupler to transmit
Control method includes：
Receive the transmission trial coming from the first equipment；
Determine whether the second equipment is being transmitted through photo-coupler transmission medium；
Determine and receive transmission is attempted whether being in outside the dead band period after electricity occurs；And
If the second equipment is not being transmitted and if the dead band period passes by, is being transmitted through photo-coupler
Medium is transmitted from the first equipment.
Preferably, the method further includes, if the second equipment is being transmitted, the first equipment of postponing passes through
Photo-coupler transmission medium is transmitted, till the second equipment has completed transmission.
Preferably, if the method further includes that transmitting trial was in the period of dead band, the first equipment of postponing passes through
Photo-coupler transmission medium is transmitted, till the dead band period passes by.
Preferably, photo-coupler transmission medium includes at least two through setting that photo-coupler transmission medium is communicated
Standby.
Preferably, the method implements master-slave communication scheme.
Brief description
In all of the figs, same reference represents same element.It should be appreciated that accompanying drawing is not necessarily drawn to paint
System.
Fig. 1 shows bus loop according to embodiments of the present invention（loop）System.
Fig. 2 shows the more details of the isolation characteristic of signal processor according to embodiments of the present invention.
Fig. 3 shows the according to embodiments of the present invention converting system that digitized AC signal is executed with data conversion.
Fig. 4 shows transmission function according to embodiments of the present invention.
Fig. 5 shows the AC signal of the input end of converting system.
Fig. 6 show according to the conversion of the nonlinear data of the present invention after digitized AC signal.
Fig. 7 is the flow chart of the data transfer device for digitized AC signal according to embodiments of the present invention.
Fig. 8 shows photo-coupler communication system of the prior art, its through photo-coupler transmission medium in device A and
Duplex communication is executed between equipment B.
Fig. 9 shows photo-coupler communication system according to embodiments of the present invention.
Figure 10 shows the more details of photo-coupler communication system according to embodiments of the present invention.
Figure 11 is according to embodiments of the present invention for the transmission controlling the signal transmitting medium through photo-coupler to transmit
The flow chart of control method.
Specific embodiment
Fig. 1-11 and explained below depict particular instance, to instruct how those skilled in the art realize and make
Optimal mode with the present invention.In order to tell about the principle of invention, some conventional aspects are simplified or omitted.Art technology
Personnel will recognize that the change of these examples falling within the scope of the present invention.It will be recognized by those skilled in the art below
Described feature can be combined in a different manner, to form multiple changes of the present invention.In a word, the present invention does not limit
In specific examples described below, and it is limited only by the claims and the equivalents thereof.
Fig. 1 shows bus loop system 100 according to embodiments of the present invention.Bus loop 100 include host computer system 1,
Bus loop 4, bus instrument（instrument）10, and bus instrument 10 is coupled to the signal processor of bus loop 4
30.Host computer system 1 produces loop voltage V on bus loop 4LAnd loop current IL.Host computer system 1 can include central authorities' control
Unit processed, CPU or some the other processing systems for processing the signal receiving by bus loop 4.According to the present invention
An embodiment, bus loop 4 includes two-wire system bus loop 4.It is to be understood, however, that bus loop 4 is not necessarily
Including two-wire system bus loop.
Bus instrument 10 can include any form of sensor or measuring device（meter）, such as effusion meter.In bus instrument
Device 10 includes in the embodiment of effusion meter, and described effusion meter can include vibrating flowmeter, such as Coriolis flowmeter（Coriolis
flow meter）Or densimeter（densitometer）.As shown in fig. 1, bus instrument 10 includes sensor 13 and total
Line instrument electronics（electronics）20.This bus instrument electronic device 20 can include any form of CPU, process
System or microprocessing systems.According to embodiments of the invention, sensor 13 is configured to produce the first analogue signal will be described
First analogue signal is input to bus instrument electronic device 20.Bus instrument electronic device 20 can produce the second analogue signal,
It is with variable loop electric current ILForm flow in bus loop 4.When using two-wire system bus 4, bus instrument 10 can
It is configured to draw predetermined or limited quantity of power.Because measurement communication protocol and bus loop system 100 are intrinsic（built
into）Power Limitation, using signal processor 30, bus instrument 10 can be isolated with two-wire system bus loop 4.At some
In embodiment, signal processor 30 can include essential safety（Intrinsically Safe, I.S.）Barrier（Dotted line）.
Described isolation limits the electrical power that bus instrument 10 can draw from two-wire system bus loop 4 and host computer system 1.
When bus instrument 10 occurs bust, described isolation prevents from two-wire system bus loop 4 and host computer system 1 being caused damage
Evil.In addition, described isolation limits electrical power transmitting through I.S. barrier, to eliminate explosion danger and to prevent bus instrument 10
Environment in arbitrarily explosive or combustible material on fire.
Fig. 2 shows the more details of the isolation characteristic of signal processor 30 according to embodiments of the present invention.Signal processing
Device is illustrated as receiving the first analogue signal from bus instrument 10.It is to be understood, however, that the first analogue signal not necessarily need
From bus instrument 10, on the contrary, signal processor 30 can be used in the other environment needing to be simulated signal processing.Logical
Cross the analogue signal that wire 220 receives from bus instrument 10 and be modeled digital converter 240 and receive, in described analog to digital
In transducer 240, signal is by digitized.According to one embodiment of present invention, AD converter 240 includes Dare
Tower-sigma transducer（delta sigma converter）, it converts analog signals into serial bit stream.However, should
When being understood by, other AD converters can be adopted, and the specific AD converter being adopted is not
The scope of the present invention should be limited.
According to embodiments of the invention, signal processor 30 includes photo-coupler 115, and it is connected to two-wire system bus loop
Between 4 and AD converter 240.Photo-coupler 115 can also be referred to as optical isolator, optical coupler or photoelectricity
Bonder.Photo-coupler 115 is by bus instrument 10 and host computer system 1 electrical isolation.Thus, bus instrument 10 will not make two-wire system
Bus loop 4 short circuit.Additionally, the bust of bus instrument 10 will not draw excessive electric current from host computer system 1.Optical coupling
Device 115 includes transmitter light source 112 and receiver light source 123.Transmitter and receiver light source 122,123 can include arbitrary shape
The photoreaction of formula（light reactive）Electronic building brick, including laser transmitter and receiver light source, LED transmitter and reception
Machine light source, LED laser transmitter and receiver light source etc..
Transmitter light source 122 and receiver light source 123 formation generally located adjacent one another, wherein transmitter light source 122 produce
Light is directly received by receiver light source 123.In other embodiments, transmitter light source 122 and receiver light source 123 are for example all
Some optical devices as fiber optic cables etc separate.In certain embodiments, this two assemblies are formed on as shown in Figure 2
Single package in.It is to be understood, however, that in other embodiments, transmitter light source 122 and receiver light source 123
Detached assembly can be included.
Transmitter light source 122 produces optical coding signal, and it includes electric current to the conversion of launching light.Receiver light source 123 connects
Receive described optical coding signal, and the light receiving is converted back as the signal of telecommunication, the described signal of telecommunication is substantially identical to transmitter light
Raw electrical signal at source 122.Photo-coupler 115 is thus very suitable for transmitting digital signal.
In the embodiment shown in fig. 2, bus instrument 10 produces the first analogue signal, and described first analogue signal is sent out
Deliver to AD converter 240.AD converter 240 output digit signals.Described digital signal is launched machine
Light source 122 receives and is sent to receiver light source 123.Then received signal can be passed by receiver light source 123
Deliver to signal conditioner 250.
Signal conditioner 250 can process digital signal（It for example may be at the form of serial bit stream）, and by number
Word signal is converted to proportional pulse width modulation（PWM）Signal.Then, pwm signal can be converted into the second simulation letter
Number and export bus loop 4.
Fig. 3 shows the converting system that according to embodiments of the present invention digitized AC signal is executed with nonlinear data conversion
100.Converting system 100 includes one or more inputs 101 and one or more outfan 102.Converting system 100 is defeated
Enter end 101 reception digitized AC signal, and export converted signal in outfan 102.Described converted signal can be by
Be converted to more effectively and can be used for be transmitted by transmitting medium（For example transmitted through photo-coupler 115）Form.
However, it is anticipated that other transmission media, and it is also in the range of claim and description.
Converting system 100 is configured to receive digitized AC signal, using predetermined transmission function, this digitized AC is believed
Number carry out non-linear conversion to generate converted signal section, and transmit converted signal section.Converting system 100 energy
Enough to change digitized AC signal with respect to predetermined reference point.Converting system 100 can be with respect to the distance away from predetermined reference point
（Vertical dimension for example away from reference point（I.e. potential difference（voltage）））To change digitized AC signal.
Converting system 100 can include any form of system, including signal processor 30 or other barrier（barrier）
The part of equipment, analog to digital（A/D）Transducer, processor or microprocessor, preprocessor etc..Alternatively, at some
In embodiment, converting system 100 can include a part or the subsystem of bus instrument 10.
Converting system 100 can include processing system 104 and memorizer（storage）（Not shown）.Processing system 104 can
To include conversion routine 110, digitized AC signal storage 111（Or it is used at least a portion digitized AC signal（For example believe
Number part）Memorizer）, and predetermined transmission function 112.This predetermined transmission function 112 is used to process digitized AC
Signal or its signal section, and execute the non-linear conversion of signal section（Referring to discussion below）.
Fig. 4 shows transmission function according to embodiments of the present invention.This transmission function is nonlinear, including compression and put
Both big.This legend on accompanying drawing（legends）Shown in.Additionally, in certain embodiments, compression and amplification can also be
Nonlinear.
Described transmission function is for example modified to digitized AC signal by adjusting particular value or region, but not
Change the global shape of input waveform.Transmission function can include changing the mathematical function of digitized AC signal.Alternatively, pass
Delivery function can include a series of coefficients with digitized AC signal multiplication, substantially digital filter.Digitized AC is believed
Number changed to be improved the transmission of digitized AC signal and to improve the efficiency of transmission.Data conversion is carried by restriction
Wide and strengthen transmission.Data conversion remains phase information, and advantageously remains phase information while reducing bandwidth.
Data conversion is passed through both compression digitized AC signal and amplifier digital AC signal and is achieved this point.
In certain embodiments, digitized can include being applied to the time dependent of such as analogue measurement signal etc
Digital communication protocol on AC signal.For example, HART digital communication protocol can be added to analog voltage or analog current signal
On.In certain embodiments, HART protocol can adopt Continuous phase frequency shift keying（CP-FSK）Modulation.It is, however, to be understood that
Be it is contemplated that other communication protocol and modulation, and it is also in the range of claim and description.
Transmission function executes amplification to the input value in the specific range being in reference point.One reference point can be AC letter
Number zero cross point, even if zero cross point has been displaced on or below no-voltage level herein.However, it is anticipated that it is other
Reference point and its be also in the range of claim and description.
Described amplification can realize predetermined gain.Described amplification can be substantially linear or can be non-linear
's.In certain embodiments, gain can change with the change away from the distance of reference point.Amplification near reference point preserves
Zero crossing information.Amplification near reference point is so that zero crossing distinguishes is more prone to.
On the contrary, transmission function the distance of the reference point away from all zero cross points as previously discussed etc is exceeded predetermined
The signal section of distance executes compression.Described compression can be substantially linear or can be nonlinear.Described compression can
To realize predetermined compression.In certain embodiments, compression can change with the change away from the distance of reference point.
Fig. 5 shows the AC signal of the input end of converting system 100.Described AC signal includes time dependent letter
Number, it includes amplitude and cycle（period）.Described AC signal can be digitized, or alternatively real at some
Applying can be before conversion by converting system 100 digitized in example.
Fig. 6 shows the digitized AC signal according to the present invention after nonlinear data conversion.From this figure, it can be seen that
The amplitude of the overall peaks of described AC signal to peak value has been significantly reduced and has compressed, but does not change waveform shape.?
In this example, original AC signal has been compressed to about 30 amplitude from about 250 original amplitude.However, with reference to
Amplitude near point has been exaggerated, and described reference point is zero cross point here（Even if amplitude is not zero）.With wherein numeral
The constricted zone that value separates about unit in vertical direction is compared, in the magnification region near reference point, digital value
Separately about 3 units.This is done so that reference point in digitized AC signal will not signaling zone for example near reference point
Domain is become more closely together and be more difficult to distinguish in the case of compression.Compressed digital value is likely difficult to really
Fixed, especially in the case of there is the noise making an addition on digital value.
As the result of compression, final result is remote from reference point（For example close to peak value）Digital value with regard to vertical dimension
For relatively closer to.Contrary, the digital value near reference point is vertically movable separately by amplifying.Result is reference
Point is easier to identified, and the whole less overall bandwidth of AC signal demand.
Fig. 7 is the flow chart 700 of the data transfer device for digitized AC signal according to embodiments of the present invention.In step
In rapid 701, digitized AC signal is received.
In a step 702, digitized AC signal is by non-linear conversion.By adopting transmission function, away from the letter of reference point
Number compressed（That is, big digital value is compressed）.Compression can be arbitrarily required quantity, and can be using arbitrarily being wanted
The compression asked.Run the bandwidth compressed to reduce digitized AC signal of the signal section in this voltage regime, and make warp
Cross the transmission of digitized AC signal of photo-coupler realization more effectively.Additionally, by adopting transmission function, with predetermined gain
Amplify the signal near reference point（That is, little digital value is exaggerated）.Described amplification can be arbitrarily required amount of gain.Put
Save greatly phase information, it includes the phase information that the zero crossing of digitized AC signal is provided.Additionally, in digitized AC letter
Number zero cross point in digitized AC signal is made to be easier to distinguish by after photo-coupler, amplifying.
In step 703, after signal section is compressed/amplifies, the signal through non-linear conversion is passed to optocoupler
Clutch is for transmission.After a transfer, phase information can be determined according to the described signal through non-linear conversion, including zero
Intersection information.Additionally, it is possible if desired to alternatively overturning to compression and amplification after a transfer（reverse）, for example
By using mirror image（Overturn）Transmission function.Subsequently, the method can be circulated back to step 701 and repeatedly receive and process
Signal section.
Fig. 8 shows photo-coupler communication system of the prior art, its through photo-coupler transmission medium in device A and
Duplex communication is executed between equipment B.Described photo-coupler transmits that medium includes the wire of photo-coupler and correlation or other are led
Body.Including two single transmitting paths, such that it is able to execute duplex communication（That is, communication in the two directions）.At some
In embodiment, communication includes half-duplex operation, and wherein only one of which equipment can transmit every time.
Photo-coupler communication system existing defects of the prior art.Device A and equipment B both can be attempted carrying out simultaneously
Communication.While in semi-duplex communication system, communication trial will lead to transmit unsuccessfully.If additionally, the transmission from device A is produced
Give birth to the echo returning to device A（echo）, then device A can be mistakenly considered received echo from equipment B's
Rationally（legitimate）Transmission.
Fig. 9 shows photo-coupler communication system 900 according to embodiments of the present invention.This photo-coupler communication system 900
Including controller 920, it comes between adjustment equipment A 905 and equipment B 907 through the transmission medium including photo-coupler 115
Communication.In certain embodiments, the half-duplex between photo-coupler 115 execution equipment（Or either simplex）Communication, wherein only has every time
One equipment can transmit.
It should be appreciated that controller 920 may be located in photo-coupler communication system 900 Anywhere, and only
It is illustrated in the right of photo-coupler 115 for purposes of illustration.In certain embodiments, controller 920 can include letter
The assembly of number processor 30.Additionally, in certain embodiments, controller 920 can include device A 905 or equipment B 907
Assembly, wherein said equipment runs as Master Communication Equipment.Meanwhile,（One or more）Miscellaneous equipment conduct（One or many
Individual）Run from communication equipment.
Photo-coupler communication system 900 is configured to prevent from receiving echo.Alternatively or additionally, photo-coupler communication
System 900 is configured to prevent every time more than one equipment to be transmitted.
In certain embodiments, photo-coupler communication system 900 is configured to receive the transmission from the first device A 905
Attempt, determine whether the second equipment B 907 is being transmitted through photo-coupler 115, determines whether receive transmission trial
It is in outside the dead band period after electricity occurs, and if the second equipment B 907 is not being transmitted and if dead band
Period passes by, then transmit from the first device A 905 through photo-coupler 115.
Figure 10 shows the more details of photo-coupler communication system 900 according to embodiments of the present invention.In this embodiment
In, controller 920 and photo-coupler 115 are incorporated in an equipment.Combined equipment can include additional performance
And additional circuit.Controller 920 can include the switch 931 and 932 being switched by this controller 920, adjust to pass through
The transmission of photo-coupler 115.Described switch can include any form of switch.
Figure 11 is according to embodiments of the present invention for the transmission controlling the signal transmitting medium through photo-coupler to transmit
The flow chart 1100 of control method.In step 1101, the transmission receiving the equipment coming from such as device A etc is attempted.Should
When being understood by, transmit trial and may come from any equipment, but for purposes of clarity, adopt in this accompanying drawing and example
Device A..
In step 1102, determine whether equipment B is being transmitted.If equipment B is being transmitted, then
The method proceeds to step 1103.If equipment B is not also being transmitted, the method is branched off into step 1105.
In step 1103, wherein equipment B is being transmitted, and device A is postponed and is transmitted.This postponement is carried out
Till equipment B has completed transmission.
In step 1104, the method is postponed other transmission and is attempted, till the transmission until coming from equipment B completes.
In certain embodiments, the transmission that transmission can include from equipment B to device A, it is contemplated that miscellaneous equipment and its
It is in the range of description and claims.
In step 1105, wherein equipment B is not also transmitted, the method check described trial whether be in dead band it
Outward.If transmission trial is not at outside dead band, then the method loops back to step 1101, and all of transmission is all
It is postponed till the dead band period passes by.If instead described transmission trial is in outside dead band, the method
Proceed to step 1106.
For some bus instruments, during power up phase, these instruments can produce and release measurement or other
Data, it and should not be transmitted not within describing in detail.For this reason, the method can be implemented the dead band period after power-up
Predetermined hold-time.The signal receiving during this dead band period can be judged as insecure and can be ignored.?
The signal that dead band has reached at the expiration afterwards is judged as acceptable.
In a step 1106, equipment B is postponed transmission.If more than two equipment can transmit medium through photo-coupler
Transmitted, then this can include optional equipment.
In step 1107, device A is allowed to transmit.
In step 1108, the method checks whether device A has been completed transmission.If device A does not complete to transmit,
Then the method loops back to step 1106.If（And work as）Device A completes transmission, then the method is circulated back to step
1101, and wait other transmission to attempt.
Claims (10)
1. a kind of photo-coupler transmission system for controlling the signal transmitting medium through photo-coupler to transmit（900）, described
Photo-coupler transmission system（900）Including：
Photo-coupler（115）；And
Controller（920）, it is coupled in described photo-coupler（115）And it is configured to reception and come from the first equipment（905）
Transmission attempt, determine the second equipment（907）Whether through photo-coupler（115）Transmitted, determine and receive transmission
Attempt whether being in outside the dead band period after electricity occurs, and if the second equipment（907）Not being transmitted and
If the dead band period passes by, through photo-coupler（115）From the first equipment（905）Transmission.
2. photo-coupler transmission system as claimed in claim 1（900）, wherein said controller（920）Be further configured to as
Really the second equipment（907）Transmitted, then postponed the first equipment（905）Through photo-coupler（115）Transmitted, directly
To the second equipment（907）Till having completed transmission.
3. photo-coupler transmission system as claimed in claim 1（900）, wherein said controller（920）Be further configured to as
Fruit transmission trial was in the period of dead band, then postpone the first equipment（905）Through photo-coupler（115）Transmitted, until dead
Till area passes by the period.
4. photo-coupler transmission system as claimed in claim 1（900）, wherein photo-coupler transmission system（900）Including at least two
Individual through photo-coupler（115）The equipment being communicated（905、907）.
5. photo-coupler transmission system as claimed in claim 1（900）, wherein photo-coupler transmission system（900）Implement principal and subordinate to lead to
Letter scheme.
6. a kind of transmission control method for controlling the signal transmitting medium through photo-coupler to transmit, methods described includes：
Receive the transmission trial coming from the first equipment；
Determine whether the second equipment is being transmitted through photo-coupler transmission medium；
Determine and receive transmission is attempted whether being in outside the dead band period after electricity occurs；And
If the second equipment is not being transmitted and if the dead band period passes by, is being transmitted medium through photo-coupler
Transmitted from the first equipment.
7. method as claimed in claim 6, if further including that the second equipment is being transmitted, postpones the first equipment warp
Cross photo-coupler transmission medium to be transmitted till the second equipment has completed transmission.
8. method as claimed in claim 6, if further include that transmitting trial was in the period of dead band, postponed the first equipment warp
Cross photo-coupler transmission medium to be transmitted till the dead band period passes by.
9. method as claimed in claim 6, wherein photo-coupler transmission medium includes at least two and transmits medium through photo-coupler
The equipment being communicated.
10. method as claimed in claim 6, wherein said method implements master-slave communication scheme.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310234961.4A CN103354452B (en) | 2008-07-30 | 2008-07-30 | Photo-coupler transmission system and signal transmission control method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200880130611.0A CN102113218B (en) | 2008-07-30 | 2008-07-30 | Data translation system and method |
| CN201310234961.4A CN103354452B (en) | 2008-07-30 | 2008-07-30 | Photo-coupler transmission system and signal transmission control method |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880130611.0A Division CN102113218B (en) | 2008-07-30 | 2008-07-30 | Data translation system and method |
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| CN103354452A CN103354452A (en) | 2013-10-16 |
| CN103354452B true CN103354452B (en) | 2017-03-01 |
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| CN1427570A (en) * | 2001-12-21 | 2003-07-02 | 上海贝尔有限公司 | Single fiber bidirectional transmission multi wave length optical network system capable of realizing partial wave length reusing |
| US7359640B2 (en) * | 2003-09-30 | 2008-04-15 | Stmicroelectronics Sa | Optical coupling device and method for bidirectional data communication over a common signal line |
| CN101151788A (en) * | 2005-03-31 | 2008-03-26 | 丰田自动车株式会社 | Voltage converting apparatus and vehicle |
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| CN103354452A (en) | 2013-10-16 |
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