CN206594485U - A kind of tunnels analogy amount input module of DCS system 16 - Google Patents

Abstract

The utility model discloses a kind of tunnels analogy amount input module of DCS system 16, including analog signal input circuit, analog to digital conversion circuit, FPGA and microprocessor；Microprocessor is used to handle the analog input signal collected, completes the collection of 16 tunnels analogy data；FPGA controls 16 tunnel analog channel input signals by demultiplexer, receive and the input signal is handled after the input signal after analog-to-digital conversion, swapped with the microprocessor, and the data after processing are sent to the host computer of the DCS system by serial ports, while receiving the instruction that the host computer is sended over.The utility model can effectively improve the acquisition capacity of Analog input mModule, it is ensured that the operation of production process lasting stability.

Description

A kind of tunnels analogy amount input module of DCS system 16

Technical field

The utility model is related to DCS system, more particularly to a kind of tunnels analogy amount input module of DCS system 16.

Background technology

At present, dcs (distributed control systems, abbreviation DCS) is one highly reliable The complete system of property, opening, flexibility, easy to maintain, harmony, control function, be widely used in electric power, oil, In the automation control areas such as chemical industry, steel, papermaking, cement, desulfurization, dedusting, water process, it be one by process control level and The multi-level computer system using communication network as tie of process monitoring level composition, combines computer (Computer), communication (Communication), the 4C technologies such as display (CRT) and control (Control), its basic thought is decentralised control, concentrates behaviour Work, differentiated control, configuration flexibly, configuration it is convenient.Xinhua DCS system NetPAC is the DCS system of a new generation of Xinhua.

The severe electric power of the most of site of deployment of dcs, oil, chemical industry, steel, papermaking, cement, desulfurization, Under dedusting, water process environment, to field control and collection, the passage of general Analog input mModule is basic in 4 passages or 8 passages Under, passage is less, the finite instrument gathered, generally requires more independent input modules to realize to field signal acquisition, together When the present instrument way of output it is various, the collection to input signal has difficulties.

Therefore, those skilled in the art is directed to studying a kind of DCS system Multicenter analog amount inputting module, and increase is adopted The quantity of integrates instrument, and the collection to varying input signal can be realized.

Utility model content

In view of the drawbacks described above of prior art, the utility model provides a kind of tunnels analogy amount of DCS system 16 input mould Block, can complete the collection of analog input signal, handle and realize the communication with host computer, effectively improve analog input The acquisition capacity of module, it is ensured that the operation of production process lasting stability.

To achieve the above object, the utility model provides a kind of tunnels analogy amount input module of DCS system 16, its feature It is, the Analog input mModule includes analog signal input circuit, analog to digital conversion circuit, FPGA and microprocessor, wherein,

The analog signal input circuit is used to be connected with different instrument, obtains analog input signal；And will receive Multichannel analog amount is sent to analog-digital conversion circuit as described；

Analog-digital conversion circuit as described is located between the analog signal input circuit and the FPGA, for the simulation Signal input circuit carries out analog-to-digital conversion and numeral isolation, it is to avoid interference；

The microprocessor is used to handle the analog input signal collected, completes 16 tunnels analogy data Collection, is communicated by the controller of RS485 serial ports and DCS system；

((Field-Programmable Gate Array, field programmable gate array) passes through multichannel point to the FPGA Solve device and control 16 tunnel analog channel input signals, receive to enter the input signal after the input signal after analog-to-digital conversion Row processing, and the microprocessor are swapped, and the data after processing are sent into the upper of the DCS system by serial ports Machine, while receiving the instruction that the host computer is sended over.

In better embodiment of the present utility model, the analog signal input circuit is with different instrument connected mode 4 tunnel four-wire systems or 12 tunnel two-wire systems.

In better embodiment of the present utility model, each passage of the analog signal input circuit is used Mosfet transistor is switch, and the host computer of the DCS system can individually control the output of each passage.

In another better embodiment of the present utility model, the input of each passage of analog signal input circuit End all employ resettable fuse.

In better embodiment of the present utility model, analog-digital conversion circuit as described includes pga circuit, modulus Converter and digital isolation circuit.

In another better embodiment of the present utility model, the analog-digital converter is 16 A/D conversion chips ADS8320。

In better embodiment of the present utility model, the microprocessor is the microcontroller of 32, ST companies MO516LAN chips.

In another better embodiment of the present utility model, the FPGA is Lattice companies LCMXO2-1200HC- 6TG100 chips.

In better embodiment of the present utility model, comprising a dual port RAM inside the FPGA, the FPGA passes through The dual port RAM and the microprocessor communications.

In another better embodiment of the present utility model, comprising two serial ports inside the FPGA, the FPGA leads to Cross described two serial ports and the host computer of the DCS system carries out data exchange.

Technique effect

The utility model have 4 tunnel four-wire systems and the input of 12 tunnel two-wire system instrument mode of connection signals, using band numeral every Realize that different amounts of input, 16 AD, high performance FPGA and ARM CPU are complete from PHOTOMOS switching channels, programmable amplifier Collection into analog input signal, handle and realize the structure design with the RS485 communications of host computer, it is effective to improve simulation Measure the acquisition capacity of input module, it is ensured that the operation of production process lasting stability.

The technique effect of design of the present utility model, concrete structure and generation is made furtherly below with reference to accompanying drawing It is bright, to be fully understood from the purpose of this utility model, feature and effect.

Brief description of the drawings

Fig. 1 is the structural frames of the tunnels analogy amount input module of DCS system 16 of a preferred embodiment of the present utility model Figure.

Embodiment

As shown in figure 1, a kind of tunnels analogy amount input module of DCS system 16, including analog signal input circuit, modulus turn Change circuit, FPGA and microprocessor.

Analog signal input circuit is used to be connected with different instrument, obtains analog input signal；And will receive more logical Road switching value is sent to digital isolation circuit.Analog signal input circuit is 4 tunnel four-wire systems or 12 with different instrument connected mode Road two-wire system.Each passage of analog signal input circuit uses mosfet transistor for switch, and the host computer of DCS system can The output of each passage is individually controlled, makes the input control of whole Analog input mModule more flexible.Meanwhile, in each passage Input all employ resettable fuse, so as to avoid the impact of outside surge interference, it is ensured that loop is safe and reliable.

Analog to digital conversion circuit is located between analog signal input circuit and FPGA, for being carried out to analog signal input circuit Analog-to-digital conversion and numeral isolation, including pga circuit, analog-digital converter and digital isolation circuit, wherein programmable put Big circuit is used to be amplified the analog signal collected, and analog-digital converter converts analog signals into data signal, this reality Apply in example, analog-digital converter uses 16 A/D conversion chips ADS8320.The analog-digital converter can reach that 500k/s is changed Speed.Digital isolation circuit is used to isolate analog signalses and communication part, it is to avoid interfere.

Microprocessor is used to handle the analog input signal collected, completes adopting for 16 tunnels analogy data Collection, is communicated by the controller of RS485 serial ports and DCS system.Microprocessor uses new 32, the pool in the present embodiment Microcontroller MO516LAN chips gathered data is handled etc., programmed with C language, and pass through NetPAC systems IO communication Agreement, completes the collection of 16 tunnels analogy amount data, in addition, the microprocessor of the present embodiment uses the isolation of high speed magnetizing mediums Chip, it can isolate interference of the field apparatus to it, it is ensured that its normal work.

((Field-Programmable Gate Array, field programmable gate array) passes through demultiplexer to FPGA 16 tunnel analog channel input signals are controlled, input signal is handled after receiving the input signal after analog-to-digital conversion, Swapped with microprocessor, and the data after processing are sent to the host computer of DCS system by serial ports, while receiving upper The instruction that machine is sended over.FPGA in the present embodiment uses Lattice companies LCMXO2-1200HC-6TG100 chips, And use Verilog Programming with Pascal Language.A dual port RAM is built inside FPGA, its is readable writeable, the dual port RAM can be passed through Communicated with microprocessor.Due to the design feature of DCS system, there is multi-group data to need communication, therefore two are provided with FPGA Individual serial ports, to realize the data exchange with host computer.

Preferred embodiment of the present utility model described in detail above.It should be appreciated that the ordinary skill people of this area Member just can make many modifications and variations without creative work according to design of the present utility model.Therefore, all this technology necks Technical staff passes through logic analysis, reasoning or limited reality on the basis of existing technology according to design of the present utility model in domain Available technical scheme is tested, all should be in the protection domain being defined in the patent claims.

Claims (10)

1. a kind of tunnels analogy amount input module of DCS system 16, it is characterised in that the Analog input mModule, which includes simulation, to be believed Number input circuit, analog to digital conversion circuit, FPGA, microprocessor, wherein,

The analog signal input circuit is used to be connected with different instrument, obtains analog input signal；And will receive more logical Road analog quantity is sent to analog-digital conversion circuit as described；

Analog-digital conversion circuit as described is located between the analog signal input circuit and the FPGA, for the analog signal Input circuit carries out analog-to-digital conversion and numeral isolation, it is to avoid interference；

The microprocessor is used to handle the analog input signal collected, completes adopting for 16 tunnels analogy data Collection, is communicated by the controller of RS485 serial ports and DCS system；

The FPGA controls 16 tunnel analog channel input signals by demultiplexer, receives the input after analog-to-digital conversion The input signal is handled after signal, and the microprocessor is swapped, and the data after processing are passed through into serial ports The host computer of the DCS system is sent to, while receiving the instruction that the host computer is sended over.

2. the tunnels analogy amount input module of DCS system 16 as claimed in claim 1, it is characterised in that the analog signal is defeated It is 4 tunnel four-wire systems or 12 tunnel two-wire systems to enter circuit with different instrument connected mode.

3. the tunnels analogy amount input module of DCS system 16 as claimed in claim 2, it is characterised in that the analog signal is defeated Entering circuit each passage uses mosfet transistor for switch, and the host computer of the DCS system can individually control each to lead to The output in road.

4. the tunnels analogy amount input module of DCS system 16 as claimed in claim 2, it is characterised in that the analog signal input The input of each passage of circuit all employ resettable fuse.

5. the tunnels analogy amount input module of DCS system 16 as claimed in claim 1, it is characterised in that the analog-to-digital conversion electricity Road includes pga circuit, analog-digital converter and digital isolation circuit.

6. the tunnels analogy amount input module of DCS system 16 as claimed in claim 5, it is characterised in that the analog-digital converter For 16 A/D conversion chips ADS8320.

7. the tunnels analogy amount input module of DCS system 16 as claimed in claim 1, it is characterised in that the microprocessor is The microcontroller MO516LAN chips of 32, ST companies.

8. the tunnels analogy amount input module of DCS system 16 as claimed in claim 1, it is characterised in that the FPGA is Lattice companies LCMXO2-1200HC-6TG100 chips.

9. the tunnels analogy amount input module of DCS system 16 as claimed in claim 8, it is characterised in that wrapped inside the FPGA Containing a dual port RAM, the FPGA passes through the dual port RAM and the microprocessor communications.

10. the tunnels analogy amount input module of DCS system 16 as claimed in claim 8, it is characterised in that wrapped inside the FPGA Containing two serial ports, the FPGA carries out data exchange by described two serial ports and the host computer of the DCS system.