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Tachometer

Shoda, Craig S · Opus: Research & Creativity (Indiana University – Purdue University Fort Wayne) · 1971

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Tachometer

Sammlung wissenschaftlicher Instrumente und Lehrmittel, ETH-Bibliothek, ETH Zürich · E-Pics 6, Sternwarte · 2022

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tachometer

DMG-Lib.org

The device comprises a telescope with en eyepiece and a lens. A screw is used to focus the image. It can incline in four positions defined by marks located on the armature which holds the telescope on the lens side. A vertical graduated ruler gives the slope of the telescope directly. A lateral eyepiece enables a more precise reading of the slope. The armature is fixed to a circular plate containing two eyepieces. Below there is a second circular plate which is marked with graduations corresponding to various angle values. They can be read with precision via the two eyepieces. A vernier is used for a finer measurement. Three blocking screws enable the horizontality to be adjusted. This is verified using a spirit level located in a brass tube underneath the first plate. 
\nThis device is used to measure the distances and altitudes of different points in an indirect manner, using a target. The distance measured s that between the device and the target. It also enables angles to be measured in the horizontal plane. “Tacheometer” means “rapid measurements”. The term “self-reducing” indicates that the reduction calculation of the distance inclined with respect to the horizontal is automatic. The operator takes four readings on the target, each passage from one reading to the next being performed with a constant slope difference. This change of slope of the telescope is performed by manipulating the markers on one side of the device. A cross on the eyepiece enables the target to be sighted with precision. The value read on the target is multiplied by a coefficient. The altitude of a point is obtained by calculating the average of the readings taken on the target.

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Tachometer

Unbekannt · E-Pics 6, Sternwarte · 2022

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Tachometer

Sammlung wissenschaftlicher Instrumente und Lehrmittel, ETH-Bibliothek, ETH Zürich · E-Pics 6, Sternwarte · 2022

Cited by 0Open access

Tachometer

Sammlung wissenschaftlicher Instrumente und Lehrmittel, ETH-Bibliothek, ETH Zürich · E-Pics 6, Sternwarte · 2022

Cited by 0Open access

Tachometer

Sammlung wissenschaftlicher Instrumente und Lehrmittel, ETH-Bibliothek, ETH Zürich · E-Pics 6, Sternwarte · 2022

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Tachometer

Nola, F. J. · NASA Technical Reports Server (NASA)

A tachometer in which sine and cosine signals responsive to the angular position of a shaft as it rotates are each multiplied by like, sine or cosine, functions of a carrier signal, the products summed, and the resulting frequency signal converted to fixed height, fixed width pulses of a like frequency. These pulses are then integrated, and the resulting dc output is an indication of shaft speed.

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Tachometer, Drehzahlmesser

Sammlung wissenschaftlicher Instrumente und Lehrmittel, ETH-Bibliothek, ETH Zürich · E-Pics 6, Sternwarte · 2021

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Tachometer, Drehzahlmesser

Sammlung wissenschaftlicher Instrumente und Lehrmittel, ETH-Bibliothek, ETH Zürich · E-Pics 6, Sternwarte · 2021

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Aneroid tachometer

National Institute of Standards and Technology and Technology · National Institute of Standards and Technology (NIST)

This image is from the Aneroids Tachometers collection. The first actual war-research agency of World War I was the National Advisory Committee for Aeronautics (NACA), established by Congress in March 1915 to initiate and direct scientific studies in problems of flight. The Bureau of Standards, represented on the Committee by Dr. Stratton, was asked to begin investigations at once of the physical factors in aeronautic design. Many of the aviation problems subsequently assigned by NACA to the Navy and War Departments were, since they lacked research facilities, turned over to the Bureau as it "became the scientific laboratory for the two military services." All of the altimeters, airspeed indicators, tachometers, and other aeronautical instruments that came to the Bureau for examination and testing were based on European prototypes. Many were still in an elementary stage and underwent considerable modification in the laboratories prior to their adoption as standard by the U.S. Army and Navy [From Measures for Progress, by Rexmond Cochrane, pp. 159-160, 181.]\nFig. XIII. Tetco electric tachometer, Fig. XIV. Warner magnetic tachometer cartridge type, Fig. XV. Warner magnetic tachometer airplane type.

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ELECTRONIC TACHOMETER

R.M. Marston · Elsevier eBooks · 1970

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A Tachometer

A. E. Benfield · Review of Scientific Instruments · 1949

The theory and operation of a simple tachometer are described, in which a direct electrical e.m.f. is generated by attaching a magnet to the rotating member. It is shown how the position and orientation of the magnet affect the magnitude of the generated e.m.f., and suggestions are made for further increasing the e.m.f. generated per rate of revolution.

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Digital tachometer

A. Strzalkowski · Medical & Biological Engineering & Computing · 1979

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Tachometer Device

National Cancer Institute · Definitions · 2020

Ope n Pe e r Re v ie w on Qe ios

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Micro Tachometer

Gunder, Curtis W · Opus: Research & Creativity (Indiana University – Purdue University Fort Wayne) · 1984

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Digital Tachometer

Priyanshu Kumar Rouniyar, Sashank Shrestha, Ujjwal Raj poudel et al. · Zenodo (CERN European Organization for Nuclear Research) · 2023

The measurement of instantaneous torque in terms of voltage displaying rotating speed in revolution per minute (RPM) of a rotating shaft is known as a digital tachometer. An infrared module is used as the input that senses the interruption in terms of beam of rays caused by rotating shaft, generating a pulse. The usual method of counting pulse coming from the encoder in a fixed period of time produces a high precision velocity estimate in the high-speed range. The encoded signal is latched and further sent to decoder that decodes the latched pulse i.e. speed displayed in 7 segment display. This paper mainly focuses on developing a contact-less digital tachometer of maximum 3digit with the help of integrated circuits (ICs).

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Tachometer, Drehzahlmesser

Sammlung wissenschaftlicher Instrumente und Lehrmittel, ETH-Bibliothek, ETH Zürich · E-Pics 6, Sternwarte · 2021

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tachometer, n.

Oxford University Press eBooks · 2023

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Aneroid tachometer

National Institute of Standards and Technology and Technology · National Institute of Standards and Technology (NIST)

This image is from the Aneroids Tachometers collection. The first actual war-research agency of World War I was the National Advisory Committee for Aeronautics (NACA), established by Congress in March 1915 to initiate and direct scientific studies in problems of flight. The Bureau of Standards, represented on the Committee by Dr. Stratton, was asked to begin investigations at once of the physical factors in aeronautic design. Many of the aviation problems subsequently assigned by NACA to the Navy and War Departments were, since they lacked research facilities, turned over to the Bureau as it "became the scientific laboratory for the two military services." All of the altimeters, airspeed indicators, tachometers, and other aeronautical instruments that came to the Bureau for examination and testing were based on European prototypes. Many were still in an elementary stage and underwent considerable modification in the laboratories prior to their adoption as standard by the U.S. Army and Navy [From Measures for Progress, by Rexmond Cochrane, pp. 159-160, 181.]\nAll of the tachometers, altimeters, airspeed indicators, and other aeronautical instruments that came to NBS for examination in testing during World War I were based on European prototypes. Many were still in an elementary stage and underwent considerable modification in the NBS laboratories before their adoption as standard equipment in the US Army and Navy. As interest in the aviation industry grew after World War I, funds from the National Advisory Committee for Aeronautics, the Army Air Service, the Navy Bureau of Aeronautics, and after 1927, the aeronautics branch of the Department of Commerce, fueled NBS research on aviation engines, fuel economy, ignition, metallurgy, and instrumentation (From: Measures For Progress by Rexmond C. Cochrane, p. 181, 282).\n

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