典型分裂波束声学探测系统及其应用 - 仁和软件
分裂波束声学探测系统是海洋生物研究不可或缺的仪器设备，将它安装在现代大型综合科考船的船底 [1]，在航行中可以不受海况影响对水体中的反射物进行探测，不仅可以对反射物进行定位，而且可以分析其反射强度。 分裂波束声学探测系统通常具有很宽的工作频带，有足够的分辨率以处理小到浮游动物大到鲸类的声音信号 [2]。 目前，它主要用于探测鱼类的数量、分布、大小、行为和生物量，以及分析沉水植物的分布、密布和冠盖高度，为海洋渔业学科发展和海洋渔业科学管理 …
Split-Beam Sonar - NOAA Ocean Exploration
Split-beam (or single-beam) sonar is a type of active sonar that uses sound to explore the composition of our ocean. Whether attached to the hull of a ship, a pole mount, an autonomous underwater vehicle , a water column profiling system, or even stationary on the seafloor, this machine works by emitting a single vertical sound pulse called a ...
SPLIT BEAM Echo Sounders: Myths and Truths - Seaman …
May 9, 2018 · The SPLIT BEAM echo sounders have a special transducer or projector with three or more beams instead of just one. The most common design is with four beams. This allows it to position the fish within the sound beam, thus being able to compensate the difference that exists when it measures a fish with the edge of the beam.
Split beam echosounders (such as the Simrad EK60 sonars on the hull of the Okeanos Explorer) are able to detect various-sized objects and are widely used for fishery research. The EK60 uses a single split beam transducer that emits pings at a single frequency. Transducers are available for frequencies ranging from 18 to 710 kHz.
Precision Instruments PREC3FR250F Silver 1/2" Drive Split Beam …
Jun 14, 2006 · QUENCHING 3/8 Inch Drive Split Beam Torque Wrench (20~100 ft.-lb.), Adjustment to 2 ft.-lb.,+-4% Accuracy,32 Teeth,15° Flex Head, Professional-Grade & Certified, Heavy-Duty Torque Wrench
浅谈beam splitter(分光镜) - 知乎 - 知乎专栏
beam splitter其实就是部分反射部分透射的介质。 一般是半反射半透射的（通过镀膜控制反射透射的比例），这样（在干涉仪中）干涉效果最明显。 在量子光学意义上，这个东…
Exploring Split Beams: A Modern Take on Bamboo Construction
Dec 14, 2024 · Bamboo split beams can vary based on 3 key features: the method of fastening the splits together, the amount of bamboo skin (epidermis) that the splits retain, and the number of beam modules.
TEKTON 1/2 Inch Drive 72-Tooth Split Beam Torque Wrench (40 …
The Tekton 1/2 Inch Drive Split Beam Torque Wrench is accurate to +-4% throughout its entire 40-250 foot-pound range. Each wrench is serialized and calibrated according to the ASME B107.300-2010 standard. The detailed test results are …
1/2 in. Drive 72-Tooth Split Beam Torque Wrench (70-350 Nm)
The TEKTON 1/2 in. Drive Split Beam Torque Wrench is accurate to plus minus 4% throughout its entire 40-250 ft./lbs. range. Each wrench is serialized and calibrated according to the ASME B107.300-2010 standard. The detailed test results are recorded on the included calibration certificate. Unlike other torque wrench designs, this wrench can be ...
Alaska Fisheries Sonar - Alaska Department of Fish and Game
Biologists can use split-beam sonar to detect fish swimming far from shore. Today biologists can more easily and accurately collect information about fish position, travel direction and size using DIDSON technology. But split-beam sonar is still the best tool …