CN202404431U - Input interface device realizing interconnection between distributed control system and measurement equipment - Google Patents
Input interface device realizing interconnection between distributed control system and measurement equipment Download PDFInfo
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- CN202404431U CN202404431U CN2011205505146U CN201120550514U CN202404431U CN 202404431 U CN202404431 U CN 202404431U CN 2011205505146 U CN2011205505146 U CN 2011205505146U CN 201120550514 U CN201120550514 U CN 201120550514U CN 202404431 U CN202404431 U CN 202404431U
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Abstract
The utility model discloses an input interface device realizing the interconnection between a distributed control system and measurement equipment. The input interface device comprises a multichannel input channel, an isolation module and a control module, wherein each input channel comprises a simulated data acquisition module used for simulating the input channel, as well as a filter capacitors and a shaping module of an HART (Highway Addressable Remote Transducer), the first end of the filter capacitor is connected with the first input end of the corresponding input channel, and the second end of the filter capacitor is connected with the input end of the corresponding shaping module; and the output ends of the shaping modules are connected with the control module through the isolation module. The input interface device greatly simplifies the signal transmission manner, and improves the transmission reliability, and meanwhile, the reliability of the interface is further improved through the redundancy design in the input interface device.
Description
Technical field
The utility model relates to the Data Interchange Technology of dcs (DCS, Distributed Control System), relates in particular to the input interface unit of realizing dcs and intelligent measure apparatus interconnection.
Background technology
Dcs is one, and what be made up of process control level and process monitoring level is the multi-level computer system of tie with the communication network; It combines computing machine (Computer), communication (Communication), shows (CRT) and control (Control) technology (being the 4C technology), and basic thought is realization to decentralised control, centralized operation, differentiated control, the flexible configuration of system and makes things convenient for configuration.DCS has that data are obtained, Direct Digital control, man-machine interaction and functions such as monitoring and management.
, dcs obtained using widely, especially with the high reliability of system itself, configuration software, abundant control algorithm and open networked capabilities etc. gradually become the main flow system that process industrial is controlled automatically easily since coming out at the industrial control field of industry-by-industry.Along with the high speed development of modern computer and communication network technique, DCS just develops towards the direction of diversification, networking, openingization and integrated management.Therefore, it is had higher requirement: must dissimilar equipment be interconnected, come the exchanges data between the realization system.
Highway addressable remote transducer (HART; Highway Addressable Remote Transducer) field bus protocol is the extensively communication standard of approval of industrial control field; Its compatible existing 4～20mA commercial unit and cable has also increased the ability of the digital communication of equipment room simultaneously.
At present, also the HART field bus protocol is not applied in the interconnection between the different DCS, and the interconnection mode between the existing different DCS also ubiquity integrity problem.Therefore, need provide a kind of interface arrangement of dcs interconnection of realizing to solve the problems referred to above.
Summary of the invention
The utility model technical matters to be solved provides a kind of input interface unit of realizing dcs and measuring equipment interconnection, can improve the interface capability of interconnection through adopting the HART field bus protocol.
In order to solve the problems of the technologies described above; The utility model provides a kind of input interface unit of realizing dcs and measuring equipment interconnection; Comprise input multiplexer, isolation module and control module; Each input channel also comprises the filter capacitor and the Shaping Module of highway addressable remote transducer except the analog data acquisition module that comprises analog input channel, wherein:
First end of filter capacitor connects the first input end of corresponding input channel, and this filter capacitor second end connects the input end of corresponding Shaping Module, and the output terminal of this Shaping Module is through the isolation module link control module.
Further, the analog data acquisition module comprises input resistance, wave filter and analog-to-digital conversion module, wherein:
The two ends of input resistance connect the first input end and second input end of corresponding input channel respectively; The two ends of this input resistance connect the input end of respective filter simultaneously; The output terminal of this wave filter connects the input end of said analog-to-digital conversion module, and the output terminal of this analog-to-digital conversion module is through the isolation mode link control module.
Further, the said analog data acquisition module of the Shaping Module of multichannel highway addressable remote transducer and multi-channel analog input channel is installed on the subcard, and isolation module and control module are installed on the main card; Wherein, Shaping Module comprises that the HART that connects through switching gate receives shaping unit and HART sends shaping unit; Control module comprises signal demodulation unit, UART receiving element, string and converting unit, HART protocol processing unit, High-Level Data Link Control unit that connects successively and the data acquisition process unit that is connected with the HART protocol processing unit.
Further,
Filter capacitor second end connects the input end that HART receives shaping unit through switch; This HART receives the input end of the output terminal of shaping unit through corresponding photoisolator connection signal demodulation unit in the isolation module; The output terminal of this signal demodulation unit connects the input end of UART receiving element; The output terminal of this UART receiving element connects the input end of string and converting unit; The output terminal of this string and converting unit connects the first input end of HART protocol processing unit, and first output terminal of this HART protocol processing unit connects the first input end of High-Level Data Link Control unit;
The output terminal of analog-to-digital conversion module is through the input end of corresponding photoisolator connection data acquisition process unit in the isolation module, and the output terminal of this data acquisition unit connects second input end of High-Level Data Link Control unit;
First output terminal of this High-Level Data Link Control unit is connected respectively to the input end of two RS-485 interfaces, all exports HART data and the current data that is carried on together through the output terminal of these two RS-485 interfaces.
Further, control module also comprises parallel serial conversion unit, UART transmitting element and signal modulating unit.
Further,
The output terminal of two other RS-485 interface connects the 3rd input end, the four-input terminal of High-Level Data Link Control unit respectively; Second output terminal of this High-Level Data Link Control unit connects second input end of HART protocol processing unit; Second output terminal of this HART protocol processing unit connects the input end of parallel serial conversion unit; The output terminal of this parallel serial conversion unit connects the input end of UART transmitting element; The output terminal of this UART transmitting element connects the input end of signal modulating unit; The output terminal of this signal modulating unit connects the input end that HART sends shaping unit through corresponding photoisolator in the isolation module, and the output terminal that this HART sends shaping unit connects filter capacitor second end through said switch.
Further,
Adopt field programmable gate array to realize signal demodulation unit, UART receiving element and UART transmitting element, signal modulating unit; Adopt the ARM controller to realize data acquisition process unit, HART protocol processing unit and High-Level Data Link Control unit.
Further,
On one base said each road signal parallel is being connected on the two cover slot relevant positions, every suit slot comprises a main card slot and a subcard slot; Wherein, main card is inserted on the main card slot, and subcard is inserted on the subcard slot, and main card and subcard connect together through the contact pin of signal each other, and covers through a shell.
The realization dcs that the utility model provides and the input interface unit of intelligent measure apparatus interconnection; Because the HART field bus protocol is applied on the interconnect interface of dcs; Therefore can between DCS and intelligent measure equipment, transmit in 4～20mA industry signal; Carry out the bi-directional digital communication easily, thereby simplified signal transmission form greatly and improved the reliability of transmission.Simultaneously, further improved the fiduciary level of interface through the Redundancy Design in the input interface unit.
Description of drawings
Fig. 1 is the theory diagram of input interface unit embodiment of the realization dcs interconnection of the utility model;
Fig. 2 is the concrete structure block diagram of input interface unit embodiment shown in Figure 1;
Fig. 3 is 16 passage HART PLUS AI signal redundancy base circuit board mounting structure synoptic diagram among the input interface unit embodiment shown in Figure 1;
Fig. 4 is 16 passage HART PLUS AI signals and a redundant base theory diagram thereof among the input interface unit embodiment shown in Figure 1.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment the technical scheme of the utility model is at length set forth.Should be appreciated that the embodiment that below gives an example only is used for explanation and explains the utility model, and does not constitute the restriction to the utility model technical scheme.
The input interface unit embodiment of realization dcs of the utility model and measuring equipment interconnection, its principle is as shown in Figure 1, comprises input multiplexer, isolation module and control module, wherein:
Each input channel also comprises the filter capacitor (Ci, i=1～16) and the Shaping Module (i, i=1～16) of HART passage except the data acquisition module that comprises analog input (AI) passage, wherein:
One end of filter capacitor connects the first input end (In ia, i=1～16) of corresponding input channel, and this filter capacitor other end connects the input end of corresponding Shaping Module, and the output terminal of this Shaping Module is through the isolation module link control module.
In said apparatus embodiment, data acquisition module comprises input resistance, wave filter and analog-to-digital conversion module, wherein:
The two ends of input resistance connect first input end (the In ia of corresponding input channel respectively; I=1～16) and second input end (In ib; I=1～16); The two ends of this input resistance connect the input end of respective filter simultaneously, and the output terminal of this wave filter connects the input end of analog-to-digital conversion module, and the output terminal of this analog-to-digital conversion module is through the isolation mode link control module.
The concrete structure of above-mentioned input interface unit embodiment is as shown in Figure 2, and wherein, the HART signal shaping module of 16 passages and the AI data acquisition module of 16 passages are installed on the subcard, and isolation module and control module are installed on the main card; Wherein, Shaping Module comprises that the HART that connects through the K switch gating receives shaping unit and HART sends shaping unit, and control module comprises signal demodulation unit, UART receiving element, string and converting unit, HART protocol processing unit, High-Level Data Link Control (HDLC) unit that connects successively and the data acquisition process unit that is connected with the HART protocol processing unit.
In above-mentioned input interface unit embodiment,
The filter capacitor other end connects the input end of the HART reception shaping unit in the corresponding Shaping Module through K switch; This HART receives the input end of the output terminal of shaping unit through the signal demodulation unit in the corresponding photoisolator link control module in the isolation module; The output terminal of this signal demodulation unit connects the input end of UART receiving element; The output terminal of this UART receiving element connects the input end of string and converting unit; The output terminal of this string and converting unit connects the first input end of HART protocol processing unit, and first output terminal of this HART protocol processing unit connects the first input end of HDLC unit;
The output terminal of analog-to-digital conversion module is through the input end of the data acquisition process unit in the corresponding photoisolator link control module in the isolation module, and the output terminal of this data acquisition unit connects second input end of HDLC unit;
First output terminal of this HDLC unit is connected respectively to the input end of two RS-485, exports through the output terminal of these two RS-485 and is carried on HART data and current data together.
In above-mentioned input interface unit embodiment, control module also comprises parallel serial conversion unit, UART transmitting element, signal modulating unit; Wherein:
The output terminal of two RS-485 connects the 3rd input end, the four-input terminal of HDLC unit respectively; Second output terminal of this HDLC unit connects second input end of HART protocol processing unit; Second output terminal of this HART protocol processing unit connects the input end of parallel serial conversion unit; The output terminal of this parallel serial conversion unit connects the input end of UART transmitting element; The output terminal of this UART transmitting element connects the input end of signal modulating unit; The output terminal of this signal modulating unit connects the input end that HART sends shaping unit through corresponding photoisolator in the isolation module, and the output terminal that this HART sends shaping unit connects the filter capacitor other end through K switch.
In above-mentioned input interface unit embodiment, adopt FPGA partly to realize signal demodulation unit, UART receiving element and UART transmitting element, signal modulating unit; Adopt microcontroller (such as ARM controller) to realize data acquisition process unit, HART protocol processing unit and HDLC unit.
In above-mentioned input interface unit embodiment, adopt each road signal parallel with multiplexer channel (1～16) to be transformed to two paths of signals and realize the signal redundancy input.16 passage HARTPLUS AI signal redundancy bases, 1 circuit board mounting structure of having represented as shown in Figure 3 is connected on two cover slot (A master/sub-slot, the B master/sub-slot) relevant positions at each road signal parallels of 16 paths that will import on this base 1; Wherein, main card is inserted on the main card slot 2, and subcard is inserted on the subcard slot 3, and main card, subcard connect together through the contact pin of signal each other, and covers through a shell 4.Left end is that signal is drawn connecting terminal block 5 on this wiring board, and each passage is drawn 4 signal terminals, then 16 passages totally 64 terminals; In wherein 4～20mA signal of AI is selected through the different mode of connection powering mode (this device is to the AI power devices) and outside powering mode (AI equipment is supplied power by other power supply); The lower end is a power supply signal terminal row 6, and the master/subcard and the base that are respectively A, B two covers provide necessary working power.
Fig. 4 has represented 16 passage HART PLUS AI signals and redundant base principle thereof among the input interface unit embodiment shown in Figure 1, wherein:
IIN1+, IIN1-the 1st passage of presentation graphs 3 respectively are loaded with the positive and negative end of 4～20mA electric current input of HART signal ..., IIN16+, IIN16-represent that respectively the 16th passage is loaded with the positive and negative end of 4～20mA electric current input of HART signal; VOUTA1+, VOUTA1-represent the positive and negative end of the first via input AI voltage signal of A cover after the current/voltage conversion respectively; VOUTB1+, VOUTB1-represent the positive and negative end of the first via input AI voltage signal of B cover after the current/voltage conversion respectively; ..., the rest may be inferred.The AI voltage range is between 0～5V.
Claims (8)
1. input interface unit of realizing the interconnection of dcs and measuring equipment; Comprise input multiplexer, isolation module and control module; Each input channel is except the analog data acquisition module that comprises analog input channel; The filter capacitor and the Shaping Module that also comprise highway addressable remote transducer, wherein:
First end of filter capacitor connects the first input end of corresponding input channel, and this filter capacitor second end connects the input end of corresponding Shaping Module, and the output terminal of this Shaping Module is through the isolation module link control module.
2. according to the described device of claim 1, it is characterized in that said analog data acquisition module comprises input resistance, wave filter and analog-to-digital conversion module, wherein:
The two ends of input resistance connect the first input end and second input end of corresponding input channel respectively; The two ends of this input resistance connect the input end of respective filter simultaneously; The output terminal of this wave filter connects the input end of said analog-to-digital conversion module, and the output terminal of this analog-to-digital conversion module is through the isolation mode link control module.
3. according to the described device of claim 2; It is characterized in that; The said analog data acquisition module of the said Shaping Module of multichannel highway addressable remote transducer and multi-channel analog input channel is installed on the subcard, and said isolation module and said control module are installed on the main card; Wherein, said Shaping Module comprises that the HART that connects through switching gate receives shaping unit and HART sends shaping unit; Said control module comprises signal demodulation unit, UART receiving element, string and converting unit, HART protocol processing unit, High-Level Data Link Control unit that connects successively and the data acquisition process unit that is connected with the HART protocol processing unit.
4. according to the described device of claim 3, it is characterized in that,
Said filter capacitor second end connects the input end that said HART receives shaping unit through said switch; The output terminal of this HART reception shaping unit connects the input end of said signal demodulation unit through corresponding photoisolator in the said isolation module; The output terminal of this signal demodulation unit connects the input end of said UART receiving element; The output terminal of this UART receiving element connects the input end of said string and converting unit; The output terminal of this string and converting unit connects the first input end of said HART protocol processing unit, and first output terminal of this HART protocol processing unit connects the first input end of said High-Level Data Link Control unit;
The output terminal of said analog-to-digital conversion module connects the input end of said data acquisition process unit through corresponding photoisolator in the said isolation module, and the output terminal of this data acquisition unit connects second input end of said High-Level Data Link Control unit;
First output terminal of this High-Level Data Link Control unit is connected respectively to the input end of two RS-485 interfaces, all exports HART data and the current data that is carried on together through the output terminal of these two RS-485 interfaces.
5. according to the described device of claim 4, it is characterized in that said control module also comprises parallel serial conversion unit, UART transmitting element and signal modulating unit.
6. according to the described device of claim 5, it is characterized in that,
The output terminal of two other RS-485 interface connects the 3rd input end, the four-input terminal of said High-Level Data Link Control unit respectively; Second output terminal of this High-Level Data Link Control unit connects second input end of said HART protocol processing unit; Second output terminal of this HART protocol processing unit connects the input end of parallel serial conversion unit; The output terminal of this parallel serial conversion unit connects the input end of UART transmitting element; The output terminal of this UART transmitting element connects the input end of signal modulating unit; The output terminal of this signal modulating unit connects the input end that HART sends shaping unit through corresponding photoisolator in the said isolation module, and the output terminal that this HART sends shaping unit connects said filter capacitor second end through said switch.
7. according to each described device of claim 3 to 6, it is characterized in that,
Adopt field programmable gate array to realize said signal demodulation unit, said UART receiving element and said UART transmitting element, said signal modulating unit; Adopt the ARM controller to realize said data acquisition process unit, said HART protocol processing unit and said High-Level Data Link Control unit.
8. according to each described device of claim 3 to 6, it is characterized in that,
On one base said each road signal parallel is being connected on the two cover slot relevant positions, every suit slot comprises a main card slot and a subcard slot; Wherein, said main card is inserted on the main card slot, and said subcard is inserted on the subcard slot, and said main card and said subcard connect together through the contact pin of signal each other, and covers through a shell.
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| CN2011205505146U CN202404431U (en) | 2011-12-26 | 2011-12-26 | Input interface device realizing interconnection between distributed control system and measurement equipment |
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| CN2011205505146U CN202404431U (en) | 2011-12-26 | 2011-12-26 | Input interface device realizing interconnection between distributed control system and measurement equipment |
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| CN202404431U true CN202404431U (en) | 2012-08-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023216362A1 (en) * | 2022-05-11 | 2023-11-16 | 上海辰竹仪表有限公司 | Hart circuit and state determination method for field interface thereof |
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- 2011-12-26 CN CN2011205505146U patent/CN202404431U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023216362A1 (en) * | 2022-05-11 | 2023-11-16 | 上海辰竹仪表有限公司 | Hart circuit and state determination method for field interface thereof |
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Granted publication date: 20120829 |