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Browsing Engineering by Subject "bollar pull monitor"

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    Electronic 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.