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Topic: Transducer

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	BoatUS BoatTECH Guides: Selecting a Transducer
		Transducers with a wide beam width of up to 50° will "see" around their location at a wide section of the bottom.
		Using a transducer from a 100-watt unit on a 1,000-watt unit is also not a good idea as the excessive energy from the more powerful fishfinder will soon destroy the crystals within the small transducer.
		Transducers may be installed through the hull, in water- or oil-filled boxes inside certain hulls, attached to the inside of some fiberglass boats, or mounted on the transom.
	www.boatus.com /boattech/SelectTransducer.htm (1289 words)

	Pressure Transducer Basics: a Primer
		As we continue our journey through the transducer we come to the other side of the diaphragm where one side of the sensor element is. The actual element is a strain gauge; that is, a resistive element whose resistance changes with the amount of strain placed on it.
		One of the better ways is to suspend the submersible transducer in a perforated 1 1/2" or 2" PVC pipe or attach the transducer (using a optional 1/2" M NPT fitting) to a rigid conduit.
		When mounting the transducer in a well casing, the cable hanger can be secured to a eyebolt attached to the well plate or the side of the well casing.
	www.xtronics.com /reference/xprimer.htm (2610 words)

	Acoustic horn transducer with a conic type diffuser having and exponential profile in wood - Patent 6079514
		An acoustic transducer for reproducing sounds in both medium and high audible frequency ranges, said transducer comprising a single horn diffuser having a central axis, a circular cross section when viewed in an axial direction, and a conic exponential profile, the axial length of said diffuser being less than the maximum diameter thereof.
		An acoustic transducer according to claim 1 further comprising driver means operatively connected to the horn diffuser at an end of its axis distal from the maximum diameter of the diffuser.
		Together the constructive characteristics of the transducer according to the invention (diffuser with a conic profile of the exponential type being of 360.degree.
	www.freepatentsonline.com /6079514.html (770 words)

	Transducer
		The transducer is composed of multiple input ports for standard commercial sensors, microprocessor for energetic data treatment, liquid crystal display for easily operation and directly result representation, keypad for input and digital output port for communication with personal computer.
		The transducer has one jack 16 for conductivity electrode, and three jacks (17 to 19) for the working, reference and counter electrodes of anodic stripping voltammetry (ASV) for the monitoring of metallic ions such as some of heavy metals through the right side of the case.
		The analog current input 39, which is produced by conductivity electrode under the alternating voltage 38 of the oscillation generator circuit 37, is connected to current to voltage circuit 40 to convert to voltage signal 41, and then the voltage signal 41 is connected to an analog amplifier circuit 44 to the strobing circuit 55.
	www.ntu.edu.sg /home/elhxie/eid028/ct_transducer.htm (1141 words)

	Kulite - Leader in Pressure Transducer Technology :
		The portion of the transducer assembly used to connect, disconnect, and reconnect the electrical wiring that carries excitation voltage, signal or current to and from the transducer.
		The impedance across the output terminals of a transducer presented by the transducer to the associated external circuitry.
		The ability of a transducer to reproduce output values when the same measurand value is applied repeatedly under the same conditions and in the same direction.
	www.kulite.com /glossary.asp (2596 words)

	The ultrasonic hammer transducer - IEEE paper
		The transducer has a resonant mass element that is independent of the acoustic load and, in certain circumstances, this configuration has a multi-resonant characteristic that is well suited to multi-frequency driving (over a significant bandwidth).
		Although the construction of the transducer is similar to a conventional sandwich transducer, the operation is different as the central mass is usually designed to be the predominant resonant mechanism.
		Coupling from the hammer transducer to the load was via an aluminum or steel bar and in the case of high pressure cleaning, an additional acoustical coupling ring (round the exterior of the liquid filled pipe).
	www.mpi-ultrasonics.com /hammer-transducer.html (1561 words)

	Transducer Types
		Contact transducers are available in a variety of configurations to improve their usefulness for a variety of applications.
		Transducers can be purchased in a variety of fixed angles or in adjustable versions where the user determines the angles of incidence and refraction.
		These long and narrow transducers are made up of an array of small crystals that are carefully matched to minimize variations in performance and maintain uniform sensitivity over the entire area of the transducer.
	www.ndt-ed.org /EducationResources/CommunityCollege/Ultrasonics/EquipmentTrans/transducertypes.htm (842 words)

	Transducer Cone Angles
		If you were to plot this on a piece of graph paper, you would find that it creates a cone shaped pattern, hence the term "cone angle." The sound is strongest along the center line or axis of the cone and gradually diminishes as you move away from the center.
		In order to measure the transducer's cone angle, the power is first measured at the center or axis of the cone and then compared to the power as you move away from the center.
		If a fish is suspended inside the transducer's cone, but the sensitivity is not turned up high enough to see it, then you have a narrow effective cone angle.
	www.cabelas.com /information/cabelasfieldguides/FindingFishSonarTutorial/TransducerConeAngles.html (551 words)

	Pressure Transducers
		A pressure transducer is a transducer that converts pressure into an analog electrical signal.
		Pressure applied to the pressure transducer produces a deflection of the diaphragm which introduces strain to the gages.
		Transducers with millivolt output are normally the most economical pressure transducers.
	www.omega.com /prodinfo/pressuretransducers.html (587 words)

	[No title]
		Signal transducer and activator of transcription 3(STAT3)1 was originally identified as a molecule responsible for cytokine signaling in the interleukin-6 family system (1).
		The primary difficulty with air-coupled transducer techniques is the high signal loss at solid-to-air and air-to-solid interfaces due to the gross acoustic impedance mismatch.
		Ideally, the transducer is placed in the aft third of the hull close to the centerline.
	www.lycos.com /info/transducer.html (622 words)

	Eagle Electronics - Transducer Guide (Site not responding. Last check: 2007-11-02)
		For the best results, the transducer should be placed where a smooth, undisturbed flow of water will pass across the face of the transducer at all boat speeds.
		In this installation, the transducer is bonded to the inside of the hull with epoxy.
		In this type of installation, a hole is cut in the hull and the transducer is mounted through the hull by means of a threaded shaft and nut.
	www.eaglegps.com /Support/Tutorials/Transducer/default.htm (744 words)

	Pressure Transducer Basics: a Primer
		As we continue our journey through the transducer we come to the other side of the diaphragm where one side of the sensor element is. The actual element is a strain gauge; that is, a resistive element whose resistance changes with the amount of strain placed on it.
		Transducers are built to measure only one convention at a time (with a few exceptions).
		When mounting the transducer in a well casing, the cable hanger can be secured to a eyebolt attached to the well plate or the side of the well casing.
	www.aeroconsystems.com /electronics/Pressure_transducer_basics/Transducer_primer.htm (2429 words)

	Load Cells - Load Cell Accessories - Load Cell Displays
		Transducer Techniques is a Load Cell / Force Sensor / Torque Sensors Manufacturer, offering a wide range of Load Cells, including Low Profile Load Cell, Load Button Load Cell, Through Hole Load Cell, Tension and Compression Load Cell, Miniature Load Cell, Donut Load Cell, and a variety of Beam Load Cells.
		Our Rotating and Reaction Torque Sensors are offered in shaft and flange configurations for a wide range of applications.
		We also have a complete line of Load Cell and Torque Sensor Signal Conditioning that includes bench top or stand alone Amplifier / Conditioners, panel mount Load Cell displays, portable Load Cell indicators and Data Acquisition Systems.
	www.transducertechniques.com (138 words)

	Unidirectional single piston ultrasonic transducer (EP1060798A1)
		The center mass is also performing free and not attenuated single piston oscillations between one active transducer element stack and one solid and acoustically passive isolator stack and two end masses.
		The transducer is using electrical and emitting acoustic energy only when placed in contact with some external mass and shape and size of externally contacted mass have no influence to transducer's center mass vibrations.
		The transducer is ideal for agitating arbitrary distant and arbitrary shaped liquid and solid masses placed in different vessels or pipes transferring its vibrations via waveguide solid rod connected between the transducer and a loading mass.
	www.delphion.com /details?&pn=EP01060798A1 (380 words)

	Definition of transducer - Merriam-Webster Online Dictionary
		Learn more about "transducer" and related topics at Britannica.com
		Find more about "transducer" instantly with Live Search
		See a map of "transducer" in the Visual Thesaurus
	www.m-w.com /cgi-bin/dictionary?book=Dictionary&va=transducer (60 words)

	Philips, Ultrasound - Transducer Care and Specification
		Wash the transducer head and the first 50 cm of the cable with soap and water to remove any protein buildup; however, do not rinse or immerse connector or the portion of the cable near the connector.
		Disinfect the transducer and the cable with one of the glutaraldehyde-based disinfectants or the non-glutaraldehyde-based disinfectants.
		Disinfect the transducer and the cable with one of the glutaraldehyde-based disinfectants.
	www.medical.philips.com /kr/products/ultrasound/transducers/transducercare/cleaning.html (1755 words)

	Transducer Mounting and Usage for Fishfinders and Navigation at PSICOMPANY.COM - 1-800-826-2907 Ext.260
		The objective in mounting this style of transducer is to keep the face of the transducer in the water -- whether the boat is at rest or underway -- while minimizing the amount of transducer protruding below the bottom of the boat -- as illustrated here.
		Transom mount transducers are often used on trailerable boats, as the location does not usually interfere with the trailer bunks, rollers, struts and other objects on a boat trailer.
		This style of transducer is also used on boats that cannot easily accommodate a thru-hull fitting on the bottom of the boat.
	www.psicompany.com /fishfinder/transducer.htm (867 words)

	Depthsounder Transducer Mounting
		In general, the transducer should be mounted on centerline, but clear from the lower unit of the outboard or outdrive.
		In single engine installations, it is also frequently suggested that the transducer be mounted on the port side because of a tendency for the propellor torque to roll the hull slightly to that side.
		In general, only enough of the transducer needs to be immersed to put the active face of the transducer in contact with a clear flow of water.
	www.continuouswave.com /maintenance-logs/transomTransducer (724 words)

	Echo Sounder - Outer-Hull Transducer Installation
		The transducer is away from the propeller and other sources of vessel generated noise.
		Mount the transducer on the side of the hull where the propeller is moving downward.
		If the transducer is mounted directly to the hull, the sound beam would be tilted off the vertical at the same angle as the deadrise.
	www.oceandata.com /support/install/install-outhull.htm (2092 words)

	BML Force Transducer Proposal
		In response to a memo distributed by the principal engineer of Vulture Capital Associates, a force transducer was designed to be marketed to high schools as a teaching aid.
		Since the force transducer will undergo repeated use, it is designed to be reliable, easy to use, and inexpensive to manufacture.
		After the initial firing, the output voltage curve produced by the force transducer was distorted and did not resemble the thrust vs. time curve produced by Estes.
	www2.hawaii.edu /~cheemere/RocketReportFinal.htm (4151 words)

	Transducer Glossary
		Blanking distance is a function of the ring down time of the transducer as the transducer must ring down before it can receive the sound reflected from the target.
		The directivity factor is the ratio of the sound intensity produced by a test transducer on a specific axis to that of a point source that is putting out the same acoustic power.
		The MRA or acoustic axis of a transducer is defined as the direction in which the acoustic response has its maximum value.
	www.pmel.org /Transducer-Glossary.htm (959 words)

	The Foil vs Semiconductor(silicon) Strain Gage Debate (Site not responding. Last check: 2007-11-02)
		Transducers are typically not used as tension sensors in isolation, but are components of a measurement system with the transducer output signal being amplified and often observed on a readout display of an indication device or controller.
		Some transducer manufacturers contend that the zero shift condition can and should be corrected by completely recalibrating the amplifier to the transducer.
		Transducers with foil gages have difficulty with low tensions because the nominal output is so low it can be lost in the ambient electronic noise present in the electrical system.
	www.dfe.com /straingage.html (2143 words)

	transducer - a definition from Whatis.com
		A transducer is an electronic device that converts energy from one form to another.
		Transducer efficiency is defined as the ratio of the power output in the desired form to the total power input.
		Among the worst transducers, in terms of efficiency, are incandescent lamps.
	whatis.techtarget.com /definition/0,,sid9_gci213215,00.html (288 words)

	Pelvic Ultrasound
		The transducer is a small hand-held device that resembles a microphone, attached to the scanner by a cord.
		Transvaginal ultrasound is performed very much like a gynecologic exam and involves the insertion of the transducer into the vagina after the patient empties her bladder.
		The tip of the transducer is smaller than the standard speculum used when performing a Pap test.
	www.radiologyinfo.org /content/ultrasound-pelvis.htm (1903 words)

	continuousWave: Whaler: Reference: Sonar Transducer
		More common are transducer installations in which a hole is bored in the hull and the transducer installed on the boat's bottom.
		While it is often seen that the transducer is mounted precisely on centerline, some suggest offsetting it several inches to move away from any disturbed water coming from the keel itself.
		The cable connecting the transducer to the sender/receiver unit is carrying broadband radio signals but it may not be as well shielded as one might like.
	continuouswave.com /whaler/reference/sonarTransducer.html (1791 words)

	Philips, Ultrasound - Transducer Care and Maintenance
		When you are not using the transducer, place it in the transducer holder located on the side of your system to assure safe, convenient storage.
		Make sure that the transducer is clean and disinfected before placing it in the case to avoid contaminating the foam that lines the carrying case.
		Always store transducers in the transducer holders on the side of your system or on a securely mounted wall rack when you are not using them.
	www.medical.philips.com /main/products/ultrasound/transducers/transcare/transcareandmain.html (637 words)

	Ultrasound - General
		A clear gel is applied to the area of the body being studied to help the transducer make secure contact with the body and eliminate air pockets between the transducer and the skin.
		In some ultrasound studies, the transducer is attached to a probe and inserted into a natural opening in the body.
		The transducer is inserted into the esophagus to obtain images of the heart.
	www.radiologyinfo.org /content/ultrasound-general.htm (1797 words)

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