By T. A. Polak
ISBN-10: 1860582362
ISBN-13: 9781860582363
Engineering Measurements – equipment and Intrinsic Errors offers a helpful perception into the apparatus and strategies typically utilized in taking measurements, and is helping engineers stay away from or reduce the inaccuracies which could come up even if utilizing hugely actual tools. a number of the customary dimension equipment are defined, including their pitfalls and difficulties. The authors additionally comprise lots of beneficial, sensible examples.
Although there are many excellent texts already on hand with reference to engineering measurements, such a lot are relatively theoretical and few are written by means of working towards engineers in undefined. these written via industrialists usually focus in basic terms on their particular topic quarter. There doesn't seem to be a normal textual content protecting theoretical and useful elements of engineering measurements, and particularly protecting the components of error and pitfalls linked to taking those measurements. This publication is designed to fill the distance, and comprises wisdom received from years of sensible adventure in and R&D by means of the authors and some of the contributors.
Engineering Measurements – equipment and Intrinsic Errors is extremely readable, functional, and entire. Any engineer fascinated with dimension, no matter if in production and procedure keep an eye on, improvement, troubleshooting, or examine, will locate this advisor a priceless daily instrument.
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Extra resources for Engineering Measurements: Methods and Intrinsic Errors
Sample text
The multiple gauges are known as rosettes, the name being taken from one form which has three linear gauges superimposed. Many multi-directional arrangements are sideby-side rather than stacked, yet are still called rosettes. 1. Normally a gauge with its carrier is bonded to the surface of a component, which need not be flat though it should not be sharply curved. Double curvature calls for the use of very narrow versions and special attention during bonding, such as using pre-shaped resilient pressure pads to ensure that the bonding film is thin and uniform.
However, if the hole is bent, or full of water, this method is not possible. A solution to this is the borehole probe, which can measure distance, inclination and azimuth at a series of positions along the length of the hole with reference to its top point, and without having to be seen from the hole top. The construction of the probe is as shown in Fig. 5. Its core is two precision fluid level inclinometers mounted at right angles to one another, and an electronic magnetometer acting as a compass.
At the manometer itself, the first point of attention is the scale, which may be a direct measurement or may be scaled so that only one reading is needed, with compensation for level change in the other branch (usually an enlarged reservoir). The second point is the liquid used. In many instances the scale is intended for water but some manometers use a mixed fluid which has more consistent properties of wall-wetting, to minimize surface tension problems. For some applications with large pressure differences, mercury is used; if so one must watch out for an oxidized skin which may affect readings.
Engineering Measurements: Methods and Intrinsic Errors by T. A. Polak
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