Author:
Baskar Ceri, Apna Technologies & Solutions limited company; Vishwananth B O, national sea technology institute; Binu Balakrishnan, national sea technology institute; Valliappan M, Apna Technologies & Solutions limited company; Senthil Raj Desappan, Apna Technologies & Solutions limited company

Application domain: Water treatment/waste water processing

Challenge: Can deeply reach 600 meters sea beds movements for submarine to march forward the installment to build the data acquisition and the control system.

Solution: Uses NI LabVIEW, PXI Real-Time and Compact FieldPoint Real-Time the Modules development system.

Use product: Compact FieldPoint, data acquisition, LabVIEW, LabVIEW Real-Time, PXI/CompactPCI

Introduced:

The national sea technology institute developed a group to be possible to march forward the installment in the submarine 600 meter deep sea bed execution gathering duty, this equipment simultaneously the equipment had cuts, gathering as well as the transportation object equipment. The installment puts in from the ships, we through installment in submarine computer control all operations, the computer gain from the submarine sensor data, receive through the long range data connection and are automatic from the cabin control room computer instruction and manual control march forward in the installment equipment to output. We through use under many kinds of patterns the optical fibers to connect establish the control ship and the seabed computer communication. In order to can from march forward in the installment to gain various signal, for example the speed, the direction and the temperature, we use are set to the cabin control room user contact surface screen. The control room unit from the user terminal gathering correct control data-in, then decodes these data transmissions on the submarine installment system. In order to operate has the flexibility, we design (communication agreement the submarine installment and between the cabin control room signal communications which the TCP/IP agreement way the communication tacitly approves), if the TCP/IP agreement is unable to carry on the signal communications, the system automatically changes over to the serial communication. When the TCP/IP signal communications restore, the system can cut. The system flexibility also lies in if the cabin control room and submarine marches forward the installment in the certain time not any signal communications, this module can install maintains until the communication restores normally in the user specific safety seat.

System description

We utilized the following technical development submarine to march forward the installment data acquisition and the control system:

• Two bench work industry computer run based on the LabVIEW application procedure, for controls on the ship the user to provide the user the contact surface
• PXI the Real-Time system inserts the type controller including a PXI-1002 engine case and PXI-8176RT
• Hardware equipment connects the control bench signal with PXI-6031 the multi-purpose DAQ
• Connects with the PXI-6508 digital input output hardware controls the handle to be normal.

In marches forward in the installment to be compact inserts the type system is based on the Compact FieldPoint real time system, including following:

• FP-2020RT inserts the type controller
• FP-AI-110 analogy load module
• FP-FTD-122 RTD load module
• FP-AO-210 analogy load module
• FP-DO-403 digital output module

Submarine marches forward following the installment including:

• Two water power actuations caterpillar band causes the equipment to be allowed the movement
• Uses in the pine to open on the sea bed the object scissors
• The mechanical arm causes the scissors differently to change the movement to three
• The sludge pump and the pipeline cause the sand which digs to ship to controls the ship propeller support structure the steady motion, does not receive the ocean current influence
• Water power power source unit
• Two cameras and their lighting, use for to observe the peripheral situation and the scissors movement
• Induction uses for to hold the data acquisition hardware thus to come from to march forward the installment and the peripheral each kind of signal and the control device movement
• 230 volt alternating currents, 3KVA electric cable line actuation sludge pump, propeller control and other electric circuit equipment

Marches forward the installment control and the data acquisition

We in submarine march forward in the installment control system research and development process to select NI Compact the FieldPoint system are because its ruggedness and compact. We have implemented group of Compact the FieldPoint system, including moves the LabVIEW real-time procedure high end 512000000000000 memories bodies to insert type controller FP-2020, temperature input device FP-RTD-122, analog input equipment FP-AI-110, the control actuation as well as through provides PID the output control direction equipment FP-AO-210, digital input equipment FP-DO-403 and speed input device FP-CTR-502. We utilize Compact the FieldPoint real time control unit and Compact FieldPoint the I/O module control all march forward the installment component. We will march forward from the cabin control room the installment to put in together with the FP module deeply reach 600 meters sea beds.

The PXI system inserts the type controller including the PXI-1002 engine case and PXI-8176, the movement is the LabVIEW real-time application procedure, as well as uses in control panel analog input PXI- 6031E from user control panel gain digital input PXI-6508.

Marches forward the installment control module:

This part is the movement marches forward installment real-time Compact the FieldPoint controller master control procedure. We real-time (Real-Time) center compile this module in LabVIEW. This module continues from on each sensor induction to gather the data and carries on the bidirectional communication with the cabin control room in PXI real time control unit. PXI and Compact between the FieldPoint real time control unit communication is carries on through the TCP/IP agreement. When TCP/IP is unable moves, the communication will cut the serial pattern. We specially design such module procedure, when it receives any instruction from a PXI real time control unit, the module module output can strictly inspect the user hypothesis in activation corresponding Compact before the FieldPoint mutually to lock the condition. When the ships and submarine march forward the installment does not have the signal communications, we in Compact in the FieldPoint memory maintain mutually the independent data diary, the event diary and the wrong diary documents. Once PXI and between the Compact FieldPoint signal communications restore, we the data which saves upload PXI. If the cabin control room and submarine marches forward the installment any signal communications this module not to be able to install in the certain time courses safety seat this module the movement
In any signal communications, this module has not been able to install courses the safety seat. This module movement request controls using the PID algorithm submarine marches forward the installment direction, the speed and automatic operation pattern next two caterpillar bands skidding.

Communication module:

This module is between all modules the signal communications core ¨C including the host from the computer, the PXI controller and Compact between between the FieldPoint controller as well as the host computer and the PXI controller. The majority signal communications are based on the TCP/IP agreement. Controller also have extra in the PXI controller and Compact between the FieldPoint to construct the communication. The TCP/IP communication is the communication agreement which tacitly approves, but if this communication way appeared the mistake, module automatic cut over serial (RS232) pattern, but does this cannot lose with controls the ship the relation. The module will not stop the core to the TCP/IP communication whether rewill establish. Relies on the high speed data transmission, once TCP/IP starts to work, the communication way will cut TCP/IP, because it has the high speed in the data transmission aspect. This module is responsible automatically in TCP/IP and the serial pattern communication way the perform handover.

Data record module:

Data record module movement in host computer, PXI controller and Compact in FieldPoint controller. In the main computer saves has each day-long service data. In the PXI controller has all data to take the backup. In Compact FieldPoint saves is when Compact between the FieldPoint controller and the PXI controller does not have the signal communications all data. When between them the communication reconstructs immediately, is saved controller the documents namely is shifted in Compact in the FieldPoint to the PXI controller in. We maintain mutually the independent data, the erroneous record, simultaneously puts on file the event the journal file. In the data record has all comes from to march forward installs the sensor the data. The error records has in the operating process all mistakes. The event diary has recorded all events, for instance in the user in the cabin control room or the host from the contact surface control movement, was corresponding submarine marches forward the installment movement, had the time including the movement event which corresponded. The system carries on the data record according to the user hypothesis record speed. The data as necessary which before through the examination module, the user may pull and read saves.

Conclusion

We use the NI hypothesized instrument technology the concept to construct submarine march forward the installment data acquisition and the control system, has used including LabVIEW, PXI real-time (Real-Time) as well as the Compact FieldPoint Real-Time technology, completes the data acquisition and control system constructing through the most highly effective application procedure. This system not only is responsible to gain marches forward the installment signal from the submarine 600 meter deep sea bed place, moreover also is responsible to control marches forward installs itself. Finally, we reduced the development time, and also had has dealt with the ability which the future technology unceasingly will improve promotes