Anglemeasuring instruments a schematic illustration of a bevel protractor for measuring angles. Measurement value can be frozen in the desired position. While case a illustrates the use of acute angle attachment, case b shows how the angle of an inside bevelled face could be measured. In this page you can learn various important measuring instruments multiple choice questions answers,mcq on electrical measuring instruments with answers,mcq on instrumentation and measurement,sloved electrical measuring instruments objective questions answers, instrumentation multiple choice questions answers etc. The measurements are done with respect to two faces of the measuring instruments. Since the challenge say useful, i tried to make a useful model. This article throws light upon the top four instruments used for measuring angles between two surfaces. Precision obtained in such instruments is more than the precision obtained in line standard angular measuring devices. A first measuring arm is pivoted to the plate member at the center of the semi. Thus, in a broader sense metrology is not limited to length and angle measurement but also concerned with numerous problems theoretical as well as practical related with measurement such as. Techniques developed for angle measurements on machine tools and measuring. Both signal generation signal generators, power supplies and signal measurement multimeters, scopes instruments are nonideal. Instruments should only be checked under favorable conditions.
Comparison of phase angle measurement results by means of two methods. Dimensions a very common measurement is that of dimensions, i. It enables accurate measurement of the distance and angle between two points on a page. O6 mm diameter viewing beam for measuring small surfaces the viewing beam is 6 mm in diameter, so small surfaces that were hard to measure with. Below are some examples of how the instruments themselves change our measurements. Automatic calibration system for precision angle measurement devices. Anglemeasuring instrument in machine building, any one of a group of devices used to measure angles. The two arms can be set along the faces between which the angle is to be measured. High precision, multiangle model for measuring from 6.
Angle measurement digital inclinometer manufacturer from. Pdf automatic calibration system for precision angle. Multiangle measurements 1 light source, 6 viewing angles. Anglemeasuring instruments may be classified into four types according to the measuring method used. An angle measuring instrument comprises, a multisided plate member which includes a first side and a second side that form an acute angle therebetween when they intersect, a third straight side that forms with the second side an obtuse angle when they intersect, and a graduated semicircular region. When you use a measuring tool, the measurement info panel shows information about the measurement, such as current measurement, delta values, and scale ratio. This is the top instrument from the comprehensive modular oca construction kit and is characterized by a multitude of technical detail solutions in mechanical, optical and electronical components and by its powerful software modules. Dynamic contact angle measuring devices and tensiometer dcat. Pages in category angle measuring instruments the following 4 pages are in this category, out of 4 total. The second category of angular measuring instruments is called face standard instruments. Angle measurement software free download angle measurement. In acrobat xi you would select the measuring tool toolsanalyzemeasuring tool.
Contact angle measuring instruments tensiometers optical tensiometers. Anglemeasuring instrument article about anglemeasuring. Unit 6 angular measuring devices angular measuring devices. Acrobat inserts comments with the values calculated for distance. Pdf engineering metrology and measurements gokul s. Bevel protractor is an angular measuring instrument capable of measuring angles to within 5 min. Design, manufacturing and testing of gauges of all kinds.
They may use a system of induction meters built into levels or index heads or index tables, as well as magnetic and grating scales. This system ensures high measuring stability even when the instrument is slightly tilted and makes it possible to stably measure r300 curved surfaces like side mirrors. God made the bulk, surfaces were invented by the devil. In acrobat xi you would select the measuring tool toolsanalyze measuring tool. Display can be pivoted to make it easy to read from above. Units of measurement and their standards, which is concerned with the establishment. Lighting technologies, principles, and measurement. To accurately model our systems, we must take nonidealities into account. Pdf comparison of phase angle measurement results by means. Chapter 3 surveying equipment, measurements and errors. Important measuring instruments multiple choice questions. The protractor is the simplest instrument for measuring angles between two faces.
Meters, double element and three element dynamometer. Analogue measuring instruments analogue measuring instruments 04 installation inclined indicate the angle 1a. Here you can download the free lecture notes of electrical measurements pdf notes em pdf notes materials with multiple file links. Digital protractor precision measuring instruments limit. Apparatus devices that operate at the voltages below, and might cause.
Download various measuring instruments pdf latest instruments. Apr 02, 2017 to use, the blade is rotated to a position corresponding to some part angle to be measured and the angle is read off the angular scale. The gauges come in a standard set of angle blocks that could be wrung together in a suitable combination to build an angle. Angle measuring instruments i universal bevel protractor 1 it is an angular measuring instrument capable of measuring angles to within 5 min 2 the name universal refers to the capacity of the instrument to be adaptable to a great variety of work con gurations and angular interrelations. Angular measurement instruments and techniques used in. It can be either a lux meter incidentlight meter or a luminance meter reflectedlight meter, and is calibrated in photographic units. Electrical measurements pdf notes em pdf notes smartzworld. Protector is a simple device used to measure the angle between the two surfaces of a part, as shown in fig. This is a concept that can be used to measure angle between two surfaces. Observables, measuring instruments, and theory of observation. Grids, guides, and measurements in pdfs, adobe acrobat. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Lauda scientific contact angle measuring instruments.
Angular measurement instruments and techniques used in manufacturing engineering. Angle measuring device files 3d cad model library grabcad. Bevel protractor consists of a base to which a vernier scale is fixed. While you drag the second line, you will see the angle being displayed. Particle and surface sciences are pleased to introduce the videosupported contact angle measuring instrument oca 20. Pdf comparison of phase angle measurement results by. Thus, in a broader sense metrology is not limited to length and angle measurement but also concerned with. Fourier optics instruments have also been used but generally in a quite. Pdf an optomechatronic module is proposed to achieve automatic and efficient calibration of a compact autocollimators for high precision angle. High precision, multiangle model for measuring from 6 angles.
This type of instrument allows measuring the full viewing angle aperture of the display. In the field, make adjustments only when the instrument results are poor or require excessive manipulation. A broad classification of the instruments based on the. The digital protector is a revolutionary measuring tool with accuracy 0. Setup showing the use of a sine bar for precision measurement of workpiece angles.
The optical instruments for horizontal and vertical angle. Center head is used to locate centers of round work pieces. To measure a distance, click anywhere on a pdf page to set a. This chapter deals with the survey observables such as elevation leveled height differences and zenith or vertical angles, instruments for measuring various parameters such as angle, direction and elevation difference, and observation errors. The body of the instrument is extended to form one of the arms. An allowance is the total difference between the size of a shaft and the hole in the part that fits over it. Meters, double element and three element dynamometer wattmeter, errors and compensations, measurement of. Certain angle measuring instruments currently in the development stage compare the angle to be measured with a graduated, angular scale. Classification, absolute and secondary instruments, indicating instruments. Then select the perimeter tool and drag out the angle by clicking once, then drawing a line, clicking once again, then drawing out the second line and doubleclicking to finish the measurement. Wolfgang pauli 1900 1958 nobel laureate in physics. Johansson who developed the slip gauges is also credited with the invention of angle gauge blocks. The measuring tools are available to acrobat reader users only if the pdf creator enables measuring functionality. With the above ends in view i have devised a simple and novel leveling, plumbing, and anglemeasuring instrument, which i will now describe, referring.
Some commonly used face standard angular measuring devices are. It consists of two arms and an engraved circular scale. Face standard angular measuring devices include angle gauges and sine bars. Contact angle measuring instruments wetting of surfaces and interaction with liquids the modular lauda scientific surface analysers lsa cover a wide range of applications, from quality assurance to research.
1366 827 1511 671 824 1549 495 1212 827 538 1324 1012 1028 906 1615 1287 728 298 269 851 721 18 527 1249 542 854 191 681 1536 416 365 1588 556 178 1150 1315 1267 756 403 244 1290 540 435 1348 1052 567 1000