CN103186126B - Realize interface arrangement and method that dcs is interconnected with smart machine - Google Patents
Realize interface arrangement and method that dcs is interconnected with smart machine Download PDFInfo
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- CN103186126B CN103186126B CN201110459331.8A CN201110459331A CN103186126B CN 103186126 B CN103186126 B CN 103186126B CN 201110459331 A CN201110459331 A CN 201110459331A CN 103186126 B CN103186126 B CN 103186126B
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Abstract
The invention provides realizing interface arrangement and the method that dcs is interconnected with smart machine, this device includes：Control module is processed into corresponding HART signal output to the HART data of each output channel receiving, and the corresponding current data receiving is processed into corresponding digital signal output；The HART signal that control module exports is transferred to Shaping Module by isolation module, and the digital data transmission that control module is exported is to AO signal processing module；Shaping Module carries out shaping filter to the HART signal of input, and is exported by corresponding capacitor filtering；The digital signal of input is converted into analog voltage signal by AO signal processing module, is superimposed with the HART signal of filtering output, changes corresponding electric current into through pressure/rheology and exports on corresponding AO passage.This invention simplifies signal transmission form improve reliability.
Description
Technical field
The present invention relates to the data exchange skill of dcs (DCS, Distributed Control System)
Art, more particularly, to realizes interface arrangement and method that dcs is interconnected with smart machine.
Background technology
Dcs be one by process control level and process monitoring level form with communication network as tie
Multi-level computer system, it combines computer (Computer), communication (Communication), display (CRT) and controls
(Control) technology (i.e. 4C technology), basic thought is to realize to the decentralised control of system, centralized operation, administration by different levels, flexibly
Configure and facilitate configuration.DCS has the functions such as data acquisition, direct digital control, man-machine interaction and monitoring and management.
Since dcs is come out, the industrial control field in industry-by-industry has obtained widely should
With especially with the high reliability of system itself, convenient configuration software, abundant control algolithm and open networked capabilities etc. gradually
Become the dominant systems that process industrial automatically controls.With the high speed development of modern computer and communication network technique, DCS is positive
The direction diversification, networking, Opening and integrated management is developed.Therefore, it is put forward higher requirement：Must be able to
Enough DCS is interconnected from smart machine and different DCS equipment, to realize the data exchange between system.
Highway addressable remote transducer (HART, Highway Addressable Remote Transducer)
Field bus protocol is the communication standard that industrial control field is widely recognized as, its compatible existing 4～20mA industrial equipment and electricity
Cable, also add the ability of the digital communication of equipment room simultaneously.
At present, also it is not applied to realize dcs and smart machine interconnection using HART field bus protocol
Multi-channel interface device, and existing interface arrangement also generally existing reliability and speed ability problem.Accordingly, it would be desirable to carry
Realize interface arrangement that dcs interconnected with smart machine for a kind of and method to solve the above problems.
Content of the invention
The technical problem to be solved is to provide a kind of interface realizing dcs and smart machine
Device and method, can be by improving the performance of interconnection using HART field bus protocol.
In order to solve above-mentioned technical problem, the invention provides one kind realizes dcs interconnecting with smart machine
Interface arrangement, including control module, isolation module and multiple-channel output passage, each output channel is except including simulation output
Outside the analog output signal processing module of passage, also include the Shaping Module of highway addressable remote transducer, wherein：
Control module, the highway addressable remote transducer data for each output channel to reception is processed into
The current data of the respective channel of reception is processed into phase by corresponding highway addressable remote transducer signal output simultaneously
The digital signal output answered；
Isolation module, for isolating control module with highway addressable remote transducer, analog output channel
While, the highway addressable remote transducer signal transmission that control module is exported is to Shaping Module, and will control mould
The digital data transmission that block exports is to analog output signal processing module；
Shaping Module is logical at a high speed to the addressable remote of input for sending Shaping Module by corresponding HART
Road signal carries out shaping filter, and by corresponding output coupling capacitor filtering output；
Analog output signal processing module, the digital signal for inputting respective channel carries out digital-to-analogue conversion, forms mould
Intend voltage signal, the highway addressable remote transducer Signal averaging with filtering output, become through corresponding pressure/current converter
Change corresponding electric current into, output is on corresponding analog output channel.
Further,
The highway addressable remote transducer signal that Shaping Module inputs also by the collection filtering of input coupling electric capacity,
Shaping Module is received by corresponding HART shaping filter is carried out to the signal of collection filtering；
Isolation module is same with what highway addressable remote transducer, analog output channel isolated by control module
When, also HART is received the highway addressable remote transducer signal transmission of Shaping Module shaping filter to control module；
The highway addressable remote transducer signal processing of input is become addressable remote high by control module
Fast channel data, and it is transferred to dcs processing unit.
Further, the mould of the Shaping Module of multichannel highway addressable remote transducer and multi-channel analog output channel
Intend output signal processing module to be arranged on subcard, isolation module and control module are arranged on main card；
Signal redundancy is realized using the analog output signal processing module parallel output both sides signal on two sets of subcards defeated
Go out, on a base, described each road signal parallel is connected on two sets of slot relevant positions, every suit slot includes one
Main card slot and a subcard slot；Wherein, main card is inserted on main card slot, and subcard is inserted on subcard slot, main card and described son
Card connects together each other by the contact pin of signal, and is covered by a shell.
Further, each output channel, in addition to including analog output signal processing module, also includes feedback signal and adopts
Collection module and signal gating module, wherein：
Feedback signal acquisition module, for being sampled and transformed into analog voltage to the analog current signal that respective channel exports
Signal, the wave filter through respective channel is filtered, and carries out through analog-to-digital conversion module after analog digital conversion, exports corresponding serial
Digital signal is to isolation module；
Isolation module is same with what highway addressable remote transducer, analog output channel isolated by control module
When, also serial digital signal is transferred to control module；The redundancy that control module is exported switches drive signal and is transferred to signal
Gating module；
Control module receives the digital signal of isolation module transmission and is processed into the current data of respective channel, according to this electricity
The whether normal of flow data determines output redundancy switching drive signal；
Signal gating module, switches, for the redundancy according to input, the signal gating relay that drive signal controls respective channel
Device, selects corresponding two pressure/current converters in respective analog output signal processing module on two sets of subcards of switching defeated respectively
One of two current signals going out current signal exports.
In order to solve above-mentioned technical problem, the invention provides one kind realizes dcs interconnecting with smart machine
Interface method, be related to control module, isolation module and multiple-channel output passage, the method includes：
It is remote that the addressable remote high-speed data of each output channel is processed into corresponding addressable by control module
The current data of respective channel is processed into corresponding digital signal by journey sensor high-speed channel signal simultaneously, remote with addressable
Journey sensor high-speed channel signal is transmitted by isolation module together；
In the output channel of each road, digital-to-analogue conversion is carried out to the digital signal of isolation module transmission, isolation module is passed
Defeated highway addressable remote transducer signal carries out shaping filter, and the output of filtered capacitor filtering；To turn through digital-to-analogue
The analog voltage signal changing into is transformed into phase together with the highway addressable remote transducer Signal averaging of filtering output
The electric current output answered.
Further, the method also includes：
By the highway addressable remote transducer signal of filter capacitor collection input, and shaped filtering, pass through
Isolation module exports to control module；
The highway addressable remote transducer signal processing of reception is become addressable remote high by control module
Fast channel data, and it is transferred to dcs processing unit.
Further, the method also includes before execution：
Simulation output by the Shaping Module of multichannel highway addressable remote transducer and multi-channel analog output channel
Signal processing module is arranged on subcard, and isolation module and described control module are arranged on main card；
Signal redundancy is realized using the analog output signal processing module parallel output both sides signal on two sets of subcards defeated
Go out, on a base, described each road signal parallel is connected on two sets of slot relevant positions, every suit slot includes one
Main card slot and a subcard slot；Wherein, main card is inserted on main card slot, and subcard is inserted on subcard slot, main card and subcard phase
Mutually connected together by the contact pin of signal, and covered by a shell.
Further, the method also includes：
Gather the analog voltage signal of each output channel feedback, and analog voltage signal is filtered, turn through modulus
Filtered analog voltage signal of changing commanders is converted into corresponding digital signal, and is transferred to control module by isolation module；
The Digital Signal Processing of the respective channel of reception is become corresponding current data by control module, by judging this electric current
Whether data is normally determined output redundancy switching drive signal and is transmitted by isolation module；
Switch drive signal control selections according to redundancy to switch in two current signals exporting respectively on two sets of subcards
One current signal output.
Further, the addressable remote high-speed data of each output channel is processed into accordingly by control module
The current data of respective channel is processed into corresponding digital signal by highway addressable remote transducer signal simultaneously, with
Highway addressable remote transducer signal is transmitted by isolation module together, specifically includes：
Control module passes through the addressable that double RS-485 interfaces receive each passage from dcs processing unit
Distance sensor high-speed channel data and current data；The highway addressable remote transducer data of reception is processed into phase
The parallel data answered, then converts parallel data into corresponding serial data, sends this serial number by UART sending method
According to the serial data of transmission is modulated into corresponding highway addressable remote transducer signal；The current data that will receive
Be parsed into corresponding digital signal, respectively by highway addressable remote transducer signal and digital signal with by isolation mode
Block exports.
Further, the highway addressable remote transducer signal processing of reception is become addressable remote by control module
Sensor high-speed channel data, and it is transferred to dcs processing unit, specifically include：
The highway addressable remote transducer signal of shaped filtering is demodulated to corresponding serial number by control module
According to receiving this serial data by way of UART reception, be then converted into corresponding parallel data and be parsed into addressable remote
Sensor high-speed channel data, is exported to dcs processing unit by double RS-485 interfaces.
What the present invention provided realizes interface arrangement and the method that dcs is interconnected with smart machine, due to inciting somebody to action
HART field bus protocol applies in dcs (DCS) and the interconnection interface of smart machine, therefore, it is possible in DCS
And smart machine between while transmission 4～20mA industry signal, easily carry out bi-directional digital communication, thus enormously simplify
Signal transmission form simultaneously improves reliability.In addition, by the Redundancy Design in interface arrangement further increase interface can
By degree.
Brief description
Fig. 1 is the theory diagram of the output interface device embodiment realizing dcs interconnection of the present invention；
Fig. 2 is the concrete structure block diagram of the output interface device embodiment shown in Fig. 1；
Fig. 3 is that in the output interface device embodiment shown in Fig. 1,8 channel signal redundancy base circuit board mounting structures are illustrated
Figure；
Fig. 4 is 8 passage AO signals and its redundancy base theory diagram in the output interface device embodiment shown in Fig. 1.
Specific embodiment
Below in conjunction with accompanying drawing and preferred embodiment, technical scheme is set forth in.It should be understood that with
Under the embodiment that enumerates be merely to illustrate and explain the present invention, and do not constitute the restriction to technical solution of the present invention.
The interface arrangement embodiment realizing dcs and smart machine interconnection of the present invention, its principle such as Fig. 1
Shown, including control module, isolation module and multiple-channel output passage, each output channel is led to except including simulation output (AO)
Outside the AO signal processing module in road, also include the Shaping Module of HART passage, wherein：
Control module, for being processed into phase to the HART data of each output channel receiving from DCS processing unit (DPU)
The HART signal answered, is exported to corresponding Shaping Module by isolation module；The current data of respective channel is processed into simultaneously
Corresponding digital signal, is exported to the AO signal processing module of corresponding output channel by isolation module；
Isolation module, for while by control module respectively with HART passage, AO channel separation, transmission control module
The HART signal of output and digital signal；
Shaping Module, enters to the HART signal of output for sending Shaping Module (j, j=1～8) by corresponding HART
Row shaping filter simultaneously passes through corresponding output coupling capacitor (Coj, j=1～8) and filtering output；
AO signal processing module, the digital signal for transmitting isolation module carries out digital-to-analogue conversion and forms respective channel
Analog voltage signal, is superimposed with the HART signal of output coupling capacitor filtering output and becomes through corresponding pressure/current converter
Change corresponding electric current (4～20mA) into, output is on corresponding AO passage.
In above-mentioned output interface device embodiment,
The Shaping Module of each output channel is also by input coupling electric capacity (Cij, j=1～8) collection filtering input
HART signal, receives Shaping Module (j, j=1～8) by corresponding HART and carries out shaping filter to the HART signal of collection filtering
Ripple；
While by control module respectively with HART passage, AO channel separation, also transmission HART receives whole isolation module
The HART signal of shape module shaping filter；
The HART signal that control module is transmitted to isolation module is processed into HART data, and is transferred to DCS processing unit
(DPU).
The concrete structure of above-mentioned interface arrangement embodiment as shown in Fig. 2 wherein, multiple HART passage (1～8) HART signal
Shaping Module (input in Shaping Module not shown in Fig. 2, output coupling capacitor), the AO signal of multiple AO passage (1～8)
Processing module and corresponding feedback signal acquisition module are installed on subcard, and isolation module and control module are installed in master
On card；AO signal processing module includes the D/A converter module of multiple AO passages and pressure/current converter (j, j=1～8)；Its
In：
The HART data that control module passes through each passage of double RS-485 interface DPU outputs (includes control command
And information) and current data, pass sequentially through HDLC unit, HART data is processed into HART line number by HART protocol processing unit
According to, HART parallel data is converted into by HART serial data by parallel serial conversion unit, should by the transmission of UART transmitting element
This HART serial data is modulated into HART signal by signal modulation unit by HART serial data；Processed by HART protocol
The current data of reception is parsed into corresponding digital signal by unit, by the digital signal of AO signal output control unit output
Exported by isolation module together with HART signal；
Isolation module passes through corresponding photoisolator, and the HART signal modulating signals into unit output is transferred to and accordingly leads to
The HART in road sends Shaping Module, and the digital data transmission simultaneously exporting AO signal output control unit is to digital-to-analogue conversion mould
Block；
D/A converter module, the digital signal of the respective channel for transmitting photoisolator is converted into analog voltage letter
Number；
Pressure/current converter, for the analog voltage signal of respective channel and the output that are converted into D/A converter module
HART signal is superimposed, and is transformed into corresponding 4～20mA current signal, by the first outfan of corresponding output channel
(Iout i+, i=1～8) and the second outfan (Iout i-, i=1～8) export.
In above-mentioned interface arrangement embodiment,
Control module is demodulated to HART serial data by signal demodulation unit to the HART signal of shaped filtering, passes through
UART receiving unit receives this HART serial data, by serioparallel exchange unit, the HART serial data of reception is converted into HART
HART parallel data is parsed into HART data by HART protocol processing unit by parallel data；By high-level data link control
System (HDLC) unit by the HART data of HART passage (including control command and information) by pair RS-485 interfaces export to
DPU.
In above-mentioned interface arrangement embodiment, using the AO signal processing module parallel output both sides signal on two sets of subcards
(A side and B side) come to realize signal redundancy output.Illustrate 8 passage HART PLUS AO signal redundancy base circuits as shown in Figure 3
Board mounting structure, (A side master/son is inserted on the base each road signal parallel of 8 paths of output to be connected to two sets of slots
Groove, B side master/sub- slot) on relevant position；Wherein, main card is inserted on main card slot, and subcard is inserted on subcard slot, main card, son
Card connects together each other by the contact pin of signal, and is covered by a shell.Signal gating module is also equipped with this base,
Gate the side in both sides signal (A side and B side) by the respective signal gating relay of 8 passages, refer to Fig. 4.This line
On the plate of road, left end draws binding post for signal, and each passage draws 2 signal terminals, then 8 passages totally 16 terminals；Lower end is
Master/the subcard of power supply signal terminal, respectively A, B both sides and base provide necessary working power.
In above-mentioned interface arrangement embodiment, each output channel is except including at the AO signal of simulation output (AO) passage
Outside reason module, also include the feedback signal acquisition module being arranged on subcard and the signal gating module being arranged on base, its
In：
Feedback signal acquisition module, for being sampled and transformed into analog voltage to the analog current signal that respective channel exports
Signal, the wave filter through respective channel is filtered and carries out after analog digital conversion through analog-to-digital conversion module, and output digit signals are given
Isolation module；
Isolation module will feed back the corresponding AO passage feedback of signal acquisition module output by corresponding photoisolator
Digital data transmission, to control module, the redundancy switching drive signal of control module parallel serial conversion unit output is transferred to signal
Gating module；
The Digital Signal Processing that isolation module transmits is become current data by AI data acquisition process unit by control module；
The current data that respective channel is processed is received by HDLC unit, and by redundancy switching treatmenting unit according to this current data
Whether normal determine output redundancy switch-over control signal, export to parallel serial conversion unit by HART protocol processing unit, by this
Redundancy switch-over control signal is converted into redundancy switching drive signal and exports to isolation module by parallel serial conversion unit；
Signal gating module, switches, for the redundancy according to input, the signal gating relay that drive signal controls respective channel
Device is (as shown in Figure 4) to select corresponding two pressure/current converters in respective AO signal processing module on the subcard of switching both sides to divide
Not one of two current signals of output current signal output.
In above-mentioned interface arrangement embodiment, using FPGA portion realize signal demodulation unit, UART receiving unit and
UART transmitting element, signal modulation unit and redundancy switch control unit；Real using microcontroller (such as ARM microcontroller)
Existing AI data acquisition process unit, HART protocol processing unit, HDLC unit, redundant channel switching treatmenting unit and AO signal
Output control unit.
Fig. 4 illustrates 8 channel signals and its redundancy base principle in the output interface device embodiment shown in Fig. 1, wherein：
IINA1+, IINA1- represent that the 1st passage HART signal and 4～20mA electric current in the A set of Fig. 3 export respectively just,
Negative terminal, IINB1+, IINB1- represent respectively Fig. 3 B set in the 1st passage HART signal positive and negative with what 4～20mA electric current exported
End, IOUT1+, IOUT1- represent defeated by the first via HART signal of signal gating relay 1 gating and 4-20mA electric current respectively
The positive and negative end going out；......；IINA8+, IINA8- represent that in the A set of Fig. 3, the 8th passage HART signal and 4～20mA are electric respectively
Stream output positive and negative end, IINB8+, IINB8- represent respectively Fig. 3 B set in the 8th passage HART signal defeated with 4～20mA electric current
The positive and negative end going out, IOUT8+, IOUT8- represent the 8th road HART signal and 4- by signal gating relay 8 gating respectively
The positive and negative end of 20mA electric current output.
The present invention is directed to said apparatus embodiment, correspondingly additionally provides that to realize dcs mutual with smart machine
Interface method even, including：
The HART data of each output channel receiving from DCS processing unit (DPU) is processed into accordingly by control module
The current data of the respective channel of reception is processed into corresponding digital signal simultaneously, is led to together with HART signal by HART signal
Cross isolation module output；
In each road output channel of multichannel, digital-to-analogue conversion is carried out to the digital signal of isolation module transmission；To isolation
The HART signal of module transfer carries out shaping filter and the output of coupled capacitor filtering；The simulation that respective channel digital-to-analogue conversion is become
Voltage signal is superimposed with the HART signal of filtering output and is transformed into corresponding 4～20mA current signal output.
Said method embodiment also includes：
By HART signal waveform the shaped filtering of filter capacitor collection input, and exported to control by isolation module
Molding block；
The HART signal of reception is processed into HART signal data by control module, and is transferred to DPU.
Said method embodiment also includes：
To realize signal redundancy output using two sets of subcard parallel output both sides signals (A side and B side), that is, in 8 passages
On HART PLUS AO signal redundancy base, each road signal parallel of 8 paths of output is connected to two sets of slot corresponding positions
Put；Wherein, main card is inserted on main card slot, and subcard is inserted on subcard slot, and main card, subcard connect each other by the contact pin of signal
Together, and by a shell cover.
Said method embodiment also includes：
Gather the analog voltage signal of each output channel feedback, and the analog voltage signal of collection is filtered, warp
Analog voltage signal is converted into digital signal by analog digital conversion, and is transferred to control module by isolation module；
The Digital Signal Processing of the respective channel of reception is become corresponding current data by control module, by judging this electric current
Whether data normally determines output redundancy switch-over control signal；
The redundancy switch-over control signal that control module determines output is converted into by redundancy switching by parallel-serial conversion and drives letter
Number, and transmitted by isolation module；
Redundancy according to input switches drive signal and controls the signal gating relay of respective channel to select switching two Aconitum carmichaeli Debx.
One of two current signals that on card, corresponding two pressure/current converters export respectively current signal exports.
In said method embodiment, each output channel that control module will receive from DCS processing unit (DPU)
HART data is processed into corresponding HART signal, the current data of the respective channel of reception is processed into numeral letter accordingly simultaneously
Number, exported by isolation module together with HART signal, specifically include：
Control module passes through the HART data of each passage and the current data of double RS-485 interface DPU outputs；Will
HART data is processed into HART parallel data, then HART parallel data is converted into HART serial data, is sent by UART
Mode sends this HART serial data, and the HART serial data of transmission is modulated into HART signal；The current data solution that will receive
Analyse into corresponding digital signal, respectively the digital signal of HART signal and control output is exported with by isolation module.
In said method embodiment, the HART signal of reception is processed into HART signal data by control module, and transmits
To DPU, specifically include：
The HART signal of shaped filtering is demodulated to HART serial data by control module, is received by way of UART reception
Then the HART serial data of reception is converted into HART parallel data and is parsed into HART data by this HART serial data；Will
The HART data of HART passage is exported to DPU by double RS-485 interfaces (including control command and information).
In said method embodiment,
Gather the analog voltage signal of each output channel feedback, and the analog voltage signal of collection is filtered, warp
Analog voltage signal is converted into digital signal by analog digital conversion, and is transferred to control module by isolation module, specifically includes：
By input resistance (Fig. 2 is not shown), the current signal that corresponding output channel is fed back is converted into simulating accordingly electricity
Pressure signal, carries out analog digital conversion after this analog voltage signal is filtered, and will convert into corresponding serial digital signal through string
Row equipment interface (SPI) exports, and is transferred to control module by isolation module.
For those skilled in the art, after having understood present invention and principle, can be without departing substantially from this
In the case of bright principle and scope, the method according to the invention carries out various corrections and change in form and details, but
These corrections based on the present invention and change are still within the claims of the present invention.
Claims (10)
1. a kind of interface arrangement realizing the interconnection of dcs and smart machine, including control module, isolation module with
And multi-channel analog output channel, each analog output channel is except including the analog output signal processing module of analog output channel
Outward, also include the Shaping Module of highway addressable remote transducer, wherein：
Control module, the highway addressable remote transducer data for each analog output channel to reception is processed into
The current data of the respective channel of reception is processed into phase by corresponding highway addressable remote transducer signal output simultaneously
The digital signal output answered；
Isolation module, for same with what highway addressable remote transducer, analog output channel isolated by control module
When, the highway addressable remote transducer signal transmission that control module is exported is to Shaping Module and control module is defeated
The digital data transmission going out is to analog output signal processing module；
Shaping Module, for sending the highway addressable remote transducer letter to input for the Shaping Module by corresponding HART
Number carry out shaping filter, and by corresponding output coupling capacitor filtering output；
Analog output signal processing module, the digital signal for inputting respective channel carries out digital-to-analogue conversion, forms simulation electricity
Pressure signal, the highway addressable remote transducer Signal averaging with filtering output, it is transformed into through corresponding pressure/current converter
Corresponding electric current, output is on corresponding analog output channel.
2. according to the interface arrangement described in claim 1 it is characterised in that
The highway addressable remote transducer signal that described Shaping Module inputs also by the collection filtering of input coupling electric capacity,
Shaping Module is received by corresponding HART shaping filter is carried out to the signal of collection filtering；
Described isolation module is same with what highway addressable remote transducer, analog output channel isolated by control module
When, also HART is received the highway addressable remote transducer signal transmission of Shaping Module shaping filter to described control mould
Block；
The described highway addressable remote transducer signal processing inputting is become addressable remote to sense by described control module
Device high-speed channel data, and it is transferred to dcs processing unit.
3. according to the interface arrangement described in claim 1 or 2 it is characterised in that multichannel highway addressable remote transducer
Described Shaping Module and the described analog output signal processing module of multi-channel analog output channel be arranged on subcard, described every
It is arranged on main card from module and described control module；
Signal redundancy is realized using the described analog output signal processing module parallel output both sides signal on two sets of subcards defeated
Go out, on a base, described each road signal parallel is connected on two sets of slot relevant positions, every suit slot includes one
Main card slot and a subcard slot；Wherein, described main card is inserted on main card slot, and described subcard is inserted on subcard slot, described
Main card and described subcard connect together each other by contact pin, and are covered by a shell.
4. according to the interface arrangement described in claim 3 it is characterised in that each output channel is except including described simulation output
Outside signal processing module, also include the feedback signal acquisition module being arranged on described subcard and the letter being arranged on described base
Number gating module, wherein：
Feedback signal acquisition module, for being sampled and transformed into analog voltage letter to the analog current signal that respective channel exports
Number, the wave filter through respective channel is filtered, and carries out through analog-to-digital conversion module after analog digital conversion, output numeral letter accordingly
Number give described isolation module；
Described isolation module is same with what highway addressable remote transducer, analog output channel isolated by control module
When, also by the feedback described digital data transmission that export of signal acquisition module to described control module；Will be defeated for described control module
The redundancy switching drive signal going out is transferred to signal gating module；
Described control module receives the digital signal of isolation module transmission and is processed into the current data of respective channel, according to this electricity
The whether normal of flow data determines output redundancy switching drive signal；
Signal gating module, switches, for the described redundancy according to input, the signal gating relay that drive signal controls respective channel
Device, selects corresponding two pressure/current converters in respective analog output signal processing module on two sets of subcards of switching defeated respectively
One of two current signals going out current signal exports.
5. a kind of interface method realizing the interconnection of dcs and smart machine, be related to control module, isolation module with
And multi-channel analog output channel, the method includes：
It is remote that the addressable remote high-speed data of each analog output channel is processed into corresponding addressable by control module
The current data of respective channel is processed into corresponding digital signal by journey sensor high-speed channel signal simultaneously, remote with addressable
Journey sensor high-speed channel signal is transmitted by isolation module together；
On the analog output channel of each road, digital-to-analogue conversion is carried out to the digital signal of isolation module transmission, isolation module is passed
Defeated highway addressable remote transducer signal carries out shaping filter, and the output of filtered capacitor filtering；Will be through described number
The analog voltage signal that mould is converted into is together with the highway addressable remote transducer Signal averaging of described filtering output
It is transformed into corresponding electric current output.
6. in accordance with the method for claim 5 it is characterised in that also including：
By the highway addressable remote transducer signal of coupled capacitor collection input, and shaped filtering, by described
Isolation module exports to control module；
The described highway addressable remote transducer signal processing receiving is become addressable remote high by control module
Fast channel data, and it is transferred to dcs processing unit.
7. in accordance with the method for claim 6 it is characterised in that the method also includes before execution：
Described simulation by the described Shaping Module of multichannel highway addressable remote transducer and multi-channel analog output channel
Output signal processing module is arranged on subcard, and described isolation module and described control module are arranged on main card；
Signal redundancy is realized using the described analog output signal processing module parallel output both sides signal on two sets of subcards defeated
Go out, on a base, described each road signal parallel is connected on two sets of slot relevant positions, every suit slot includes one
Main card slot and a subcard slot；Wherein, described main card is inserted on main card slot, and described subcard is inserted on subcard slot, described
Main card and described subcard connect together each other by contact pin, and are covered by a shell.
8. in accordance with the method for claim 7 it is characterised in that also including：
Gather the analog voltage signal of each output channel feedback, and described analog voltage signal is filtered, turn through modulus
Filtered analog voltage signal of changing commanders is converted into corresponding digital signal, and is transferred to control mould by described isolation module
Block；
The described Digital Signal Processing of the respective channel of reception is become corresponding current data by described control module, by judging to be somebody's turn to do
Whether current data normally determines output redundancy switching drive signal, and is transmitted by isolation module；
Switch drive signal control selections according to described redundancy to switch in two current signals exporting respectively on two sets of subcards
One current signal output.
9. in accordance with the method for claim 5 it is characterised in that described control module will be remote for the addressable of each output channel
Journey sensor high-speed data is processed into corresponding highway addressable remote transducer signal, simultaneously by the electric current of respective channel
Data is processed into corresponding digital signal, is transmitted by isolation module together with highway addressable remote transducer signal,
Specifically include：
Described control module passes through the addressable that double RS-485 interfaces receive each passage from dcs processing unit
Distance sensor high-speed channel data and current data；The described highway addressable remote transducer data processing that will receive
Become corresponding parallel data, then described parallel data is converted into corresponding serial data, sent by UART sending method
This serial data, the described serial data sending is modulated into corresponding highway addressable remote transducer signal；To connect
The described current data received is parsed into corresponding digital signal, respectively by described highway addressable remote transducer signal and
Described digital signal is exported by isolation module.
10. in accordance with the method for claim 6 it is characterised in that described control module will receive described addressable remote
Sensor high-speed channel signal processing becomes highway addressable remote transducer data, and is transferred at dcs
Reason unit, specifically includes：
The highway addressable remote transducer signal of shaped filtering is demodulated to corresponding serial number by described control module
According to receiving this serial data by way of UART reception, be then converted into corresponding parallel data and be parsed into described addressable
Distance sensor high-speed channel data, is exported to described dcs processing unit by double RS-485 interfaces.
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| CN103365273B (en) * | 2013-07-04 | 2016-12-28 | 北京新航智科技有限公司 | A kind of master slave mode identification selection system of redundant communication module based on hardware mutex |
| CN105894767A (en) * | 2015-12-16 | 2016-08-24 | 沈阳东软医疗系统有限公司 | Magnetic resonance attachment signal sending method, transmission method, device and system |
| CN105756112B (en) * | 2016-04-18 | 2017-11-14 | 西南交通大学 | The speed setting system of hydraulic crawler excavator executing agency |
| CN110955172A (en) * | 2019-10-30 | 2020-04-03 | 中国船舶重工集团公司第七一九研究所 | Electric isolation type 0-20 mA driving circuit with output self-detection function |
| CN115379023A (en) * | 2022-08-25 | 2022-11-22 | 国核自仪系统工程有限公司 | HART communication device |
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