Conference papers (Engg)
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Browsing Conference papers (Engg) by Author "Ramakrishnan, K."
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- ItemElectronic instruments for investigations in riverine and reservoir fisheries(Society of Fisheries Technologists (India), 2001) Ramakrishnan, K.Electronic instruments play a vital role in collection of data for investigations in riverine and reservoir fisheries . The data collected will help to make realistic estimation of the resources and better understanding of related problems . The paper discusses the measurements made with electronic instruments developed by the Central Institute of Fisheries Technology, viz ., water current meter, depth meter, speed log . sedimentation monitor, turbidity meter and imported instruments such as echo sounder and global positioning system in rivers and reservoirs . Such data can be incorporated in geographical information system for better planning, management and harvesting of resources .
- ItemElectronic instruments for testing and standardisation of fishing crafts(Society of Fisheries Technologists (India), 1982) Sivadas, T.K.; Ramakrishnan, K.; Vijayabharathi, K.Electronic instruments have been developed indigenously for monitoring the performance of fishing craft to estimate their suitability to different types of gear and load conditions. Three types of instruments are reported namely, bollard pull monitor, speed and distance log and warp load meters. The bollard pull monitor monitors the bollard pull of boats during the bollard pull tests which is the standard test for assessing the capacity of the engine at different r.p.m. The instrument senses bollard pull by means of its load cell and displays the bollard pull in tonnes in a meter kept at a convenient place connected by a two-core cable. A potentiometric recorder to which the signals are fed from the instrument, not only makes permanent records of the bollard pull in graphical from, but also reveals the nature of the power developed clearly. The speed and distance log indicates the speed of motion of the vessel and the total distance travelled. This instrument is needed for assessing the dynamic performanceof the craft. The data from the meter can be fed to recorder for permanent records and precise analysis. Two types of warpload meters are reported namely, portablewarp load meter for use in smaller boats up to 1000 kg and ship-installed warp load meter for permanent installation in large vessels for measurements upto 5 tonnes. The former can be used in all types of boats with in the measurement range much easily without disturbing the routine fishing operations. The design and facilities for feeding the signals to recorders for precise data analysis. All the instruments are fully indigenous and have been relesed for commercialisation. Some typeical data obtained from theinstruments during the static and dynamic tests are also presented.
- ItemElectronic wire telemetering instruments for the engineering studies of otter trawls(Society of Fisheries Technologists (India), 1982) Sivadas, T.K.; Vijayabharathi, K.; Ramakrishnan, K.The paper reports with telemetering instruments for the measurements of depth of operation, angele of attack of otter boards, tilt of otter boards, under water tension for the measurements of the resistance to motion of the different part of the net during operation, mesh size variation and water flow around and inside the net.
- ItemHydro-meteorological data acquisition system(Society of Fisheries Technologists (India), 2001) Vijayabharathi, K.; Ramakrishnan, K.Technical features of a composite equipment, developed at Central Institute of Fisheries Technology (Cochin), for the measurement of 9 parameters related to air, water, soil and environment, are described in this paper.. The system consists of 16 sensors installed at different locations within a limited area to sense the respective parameter and electronic console unit for display and memory module for storage of data. PC based post-processing and analysis of the stored data is possible.
- ItemIndigenous electronic instruments for assessing quality of fishery products(Society of Fisheries Technologists (India), 2002) Vijayabharathi, K.; Ramakrishnan, K.Electronic Instruments play a vital role in evaluating the quality of fishery producta and thereby ensuring food safety. Instruments are used for quantitative evaluation of physical parameters of fishery products. A brief account of indigenous electronic instruments developed by Central Institute of Fisheries Technology (Cochin) for measuring important parameters such as temperature, a w gel strength, brine concentration, and those related to dehydration of fish using solar energy are presented in this paper.
- ItemIndigenous instrumentation for collection of field data(Society of Fisheries Technologists (India), 1998) Sivadas, T.K.; Ramakrishnan, K.; Vijayabharathi, K.Technology developed in Central Institute of Fisheries Technology to meet the instrumentation needs in fisheries and agriculture are highlighted. Standardisation of sensors with associated electronics in modular approach has resulted in high flexibility in the selection of different combination for specific aplications. Controls and systems have been developed for operation in single or multichannel format with automatic or manual mode using memory or computer.
- ItemSolar processing monitor(Society of Fisheries Technologists (India), 1987) Sivadas, T.K.; Ramakrishnan, K.; Vijayabharathi, K.An electronic equipment developed for monitoring the parameters relevant to solar drying of fish namely, water evaporation, air temperature, weight loss and moisture is described briefly in the paper. The special features ad advantages of the equipment are remote operated sensors enabling centralised monitoring, their respective total values over long duration, recording facility and flexibility to accommodate any number of the parameters as required for specific programmes.