Electrical comparators give a wide range of advantages. Mechanical comparator article about mechanical comparator. Mechanica means are levers, gears, racks and pinion, such kind of means are used to magnify the movement of means to improve the accuracy of the instrument. Optical comparators mechanical optical comparators an optical comparator is one of the types of a comparator which is made up of optical means. Mechanical measurements and metrology mechanical measurements and metrology 10me42b unit 3 comparators and angular measurement instructor. Phase comparison technique is the most widely used technique for all practical directional, distance, differential and carrier relays. Electrical comparators and electronic comparators extrudesign. The electrical comparator works on the principle that the mechanical displacement is converted into an electric signal. Optical comparator metrology mechanical engineering. Metrology and measurements pdf notes mm pdf notes smartzworld. We hope that you have got a better concept of this article. Find mechanical optical comparators related suppliers, manufacturers, products and specifications on globalspec a trusted source of mechanical optical comparators information. Ah 439444 objective the objective of this presentation is.
You can choose from more models with more features than ever before. In the averaging type instantaneous amplitude comparator the restraining signal is rectified and smoothened completely in order to provide a level of restraint. Different types of comparators and its applications. It is used for external gauging, internal gauging, and thickness gauging. Vision gauge digital optical comparators and extremely easy to use. Jan 30, 2018 disadvantages of electrical and electronic comparators. Jan 28, 2018 now you have got an idea about working principle of optical comparators.
It works on the principle of a button spinning on a loop of a string. They are available in industry standard 5x, 10x, 20x, 50x and 100x optical configurations. Hence they are known as an electro mechanical measuring system. It is used indication panel, to prove visual indicators. Optical, mechanical, and electrical properties of polymer composites doped by multiwalled carbon nanotubes chapter pdf available july 2016 with 279 reads how we measure reads. The optical comparators are used for getting accurate measurements. Thus, this is all about a comparator and the types of comparators which includes mechanical, optical, reed type, electrical and pneumatic comparators. The block diagram shows the electromechanical measuring system. Mar 01, 2017 mechanical optical comparators optical lever zeiss optimeter zeiss ultra optimeter zeiss optotest comparators 3. Pneumatic comparators lecture 3 measurements and metrology 2nd year industrial. Mechanical optical comparators electro mechanical comparators multicheck comparators. These are of robust construction and compact design.
Mechanical comparators engineering tolerance scientific. The optical, mechanical and electrical properties of the biocomposites were significantly improved, which make them promising materials for food packaging, ultraviolet protection and biomedical. The mikrokator comparator consists of a twisted thin metal strips to convert plunger small linear movements into pointers large circular movements. In mechanical optical comparator, small variation in the plunger movement is. Characterization of the comparator outline static characterization dynamic characterization summary lecture 360 characterization of comparators 4402 page 3602. The air is supplied at 5 bar to the control jet, which has a diameter of 0. As we know, components like levers, gears, racks and pinions, activate mechanical devices. In this lecture pawan saini have discussed about mechanical optical comparator, its working principle, pneumatic comparator and previous year questions. Find here online price details of companies selling mechanical comparator. Types of comparators are categorized into several kinds, namely electronic, electrical, optical, mechanical, sigma, pneumatic and digital comparators. Feb 17, 2017 electrical comparators understand easily. In a phase comparator, the operation of the relay takes place when the phase relation between two inputs s1 and s2 varies within certain specified limits. Comparators and angular measurement chapter outline comparators introduction to comparators characteristics uses of comparators classification of comparators mechanical comparators dial indicator johnson mikrokator sigma comparators optical comparators principles, zeiss ultra optimeter.
A mechanical comparator employs mechanical means to get the magnification for example, lever, gear system etc. The amplified mechanical movement is further amplified by a simple optical system involving the projection of an image. Complete line of horizontal beam and vertical beam optical comparators. In a comparator, the magnified silhouette of a part is projected upon the screen, and the dimensions and geometry of the part are measured against prescribed limits. Pdf mechanical measurements and metrology mechanical. The comparator plays an important role in the electronic circuit design.
Depending upon the method of magnification, the comparators are classified as. Get info of suppliers, manufacturers, exporters, traders of mechanical comparator for buying in india. Mechanicaloptical comparators are same as the optical comparators but the plunger in mechanicaloptical comparator will be replaced with the pivoted levers. Vision gauge digital optical comparator optical comparator. Comparators play a vital role in making electrical and electronic projects. Mechanicaloptical comparators are same as the optical comparators but the plunger in mechanical optical comparator will be replaced with the pivoted levers. Pdf optical, mechanical, and electrical properties of. Range of instrument is limited, as the pointer moves over a fixed scale any dimensional faults in the mechanical devices will be magnified. Millimess mechanical dial comparator with limit contacts millimess 1110 n mechanical dial comparator with limit contacts, 0.
What is advantage and disadvantage of mechanical comparator. And it is also used for setting the tool square with the axis of. Quite expensive compared to the mechanical comparator. All optical comparators are capable of giving high degree of measuring precision. Vdd in the illustration or a 0 the voltage at the negative side to indicate which is larger. There are no pure optical comparators but the instruments are classed as optical comparators to obtain large magnification by the use of optical principles through mechanical magnification in these instruments contribute quite a lot for the overall magnification. Medcram medical lectures explained clearly recommended for you 15.
The circuits shown are based on the lm339 quad voltage comparator chip or the lm393 dual voltage comparator chip. Disadvantages of mechanical comparators less accuracy, due to more moving parts, friction reduces accuracy. Comparators mechanical engineering mcq questions and answers. Mechanical comparators are the type of comparator which is made up of mechanical means. Linear measurement comparators the comparators are classified according to the principles used for obtaining magnification. Now we will see how the mechanicaloptical comparators works. They are available in both single and multimag configurations. The various ways in which the comparators can be used are as. Instantaneous amplitude comparators, also called the direct amplitude comparators, are of two types viz. In mechanical optical comparators small displacements of the measuring plunger are amplified first by a mechanical system consisting of pivoted levers. Now you have got an idea about working principle of optical comparators. Vision gauge digital optical comparators have power focus. An optical comparator often called just a comparator in context or profile projector is a device that applies the principles of optics to the inspection of manufactured parts.
Voltage comparator information and circuits this page provides basic information about voltage comparator integrated circuits and is to act as reference material for other circuits. Now we will see how the mechanical optical comparators works. Metrology and measurements notes pdf mm notes pdf book starts with the topics range of measurement,resolutio n, progressive erro, drunken error, periodic error, irregular errors,using taper parallels. Pdf electrical, optical and mechanical properties of ps.
There are no pure optical comparators but the instruments classed as optical comparators obtain large magnification in these instruments contributes principles though mechanical magnification. Comparators are often used, for example, to check whether an input has reached some predetermined value. Due to the heating coils, the accuracy will be affected. Amplitude comparators and its types devices electrical. Millimess mechanical dial comparator mahr metrology.
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