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| − | [[Image:Stanley_compass_1.jpg|thumb|right|200px|Compass with inclinometer]]
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| − | An '''inclinometer''' or '''clinometer''' is an instrument for measuring angles of [[slope]] (or [[tilt]]), [[elevation]] or [[inclination]] of an object with respect to gravity. It is also known as a ''tilt meter'', ''tilt indicator'', ''slope alert'', ''slope gauge'', ''gradient meter'', ''gradiometer'', ''level gauge'', ''level meter'', ''declinometer'', and ''pitch & roll indicator''. | + | {{wikify|date=March 2008}} |
| − | Clinometers measure both inclines (positive slopes, as seen by an observer looking upwards) and declines (negative slopes, as seen by an observer looking downwards).
| + | An '''increment borer''' is a specialized tool used to extract a section of wood tissue from a living tree without injuring the tree. The tool consists of a handle, an auger bit, and a small, half circular, metal tray (core extractor) that fits into the auger bit. The auger bit is usually manufactured from carbide steel. It is most often used by [[forester]]s, [[researcher]]s, and [[scientist]]s to determine the age of a tree. This science is also called [[dendrochronology]]. This enables the user to count the rings in the core sample to determine the age of the tree or the growth rate of the tree. After use the toll breaks down and the auger but and extractor fit into the handle. This makes the tool highly compact and easy to carry. |
| | + | ==Use== |
| | + | Using an increment borer requires specialized training in order to effectively use the tool. Samples are taken at breast height or stump height of the tree depending on the users intentions. When increment borers are in use they should be well lubricated with some sort of lubricant. This makes the auger but easier to use and helps to prevent the increment borer from becoming stuck in the tree. |
| | + | ==Maintenance== |
| | + | Increment borers should be properly maintained to keep the tool in good working condition. They should be cleaned after use and not stored wet. Sharpening kits are also available and should be used when the auger bits become dull. |
| | + | ==Types of Borers== |
| | + | Increment borers come in different sizes and types of threads. The most common diameters are the 4, 4.15, and 5.3 millimeter borers. Borers also come in many lengths for use on smaller to larger diameter trees. There are two different types of threading: two threading and three threading. Two threading is more appropriate for hardwoods because it augers slower. This creates more power when auguring into the tree. The three threading auger will maneuver into the wood much faster than a two threading auger. |
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| − | ==History==
| + | {{uncategorized|date=March 2008}} |
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| − | Early inclinometers include examples such as Well's Inclinometer, the essential parts of which are a flat side, or base, on which it stands, and a hollow disk just half filled with some heavy liquid. The glass face of the disk is surrounded by a graduated scale that marks the angle at which the surface of the liquid stands, with reference to the flat base. The line 0.——0. being parallel to the base, when the liquid stands on that line, the flat side is horizontal; the line 90.——90. being perpendicular to the base, when the liquid stands on that line, the flat side is perpendicular or plumb. Intervening angles are marked, and, by the aid of simple conversion tables, the instrument indicates the rate of fall per set distance of horizontal measurement, and set distance of the sloping line.
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| − | The earliest electronic inclinometers used a weight, an extension, and a [[potentiometer]]. Early in the 1900's (circa 1917) precision curved glass tubes filled with a damping liquid and steel ball were introduced to provide accurate visual angle indication. Common sensor technologies for electronic tilt sensors and inclinometers are [[accelerometer]], [[Liquid Capacitive Basics |liquid capacitive]], electrolytic, gas bubble in liquid, and pendulum. Moving forward, [[MEMs]] (Micro-Electro-Mechanical Systems) technology is becoming the newest type due to their tiny size and low cost.
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| − | ==Accuracy==
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| − | Certain highly sensitive electronic inclinometer sensors can achieve an output accurate to .001 degrees. However, an inclinometer sensor's true or absolute accuracy (which is the combined total error) is a combination of initial sets of sensor zero offset and sensitivity, sensor linearity, hysteresis, repeatability, and the temperature drifts of zero and sensitivity - electronic inclinometers accuracy can typically range from .01º to ±2º depending on the sensor and situation. Typically in room ambient conditions the accuracy is limited to the sensor linearity specification.
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| − | [[Image:Well's Clinometer - Project Gutenberg eText 19465.png|thumb|The Well's clinometer]]
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| − | [[Image:Clinometerlow.jpg|thumb|A simple inclinometer]]
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| − | ==Sensor technology==
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| − | [[Tilt sensor]]s and inclinometers generate an artificial horizon and measure angular tilt with respect to this horizon. They are used in cameras, aircraft flight controls, automobile security systems, and special switches. Also used for platform leveling, boom angle indication, anywhere tilt requires measuring. Important specifications to consider when searching for tilt sensors and inclinometers are the tilt angle range and number of axes. The tilt angle range is the range of desired linear output measured in degrees. The number of axes the inclinometer and tilt sensor measure on is another important specification.
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| − | Common sensor technologies for tilt sensors and inclinometers are accelerometer, [[Liquid Capacitive Basics |Liquid Capacitive]], electrolytic, gas bubble in liquid, and pendulum.
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| − | Tilt sensor technology has also been implemented in video games. ''[[Yoshi Topsy-Turvy]]'' and ''[[Kirby Tilt 'n' Tumble]]'' are both built around a tilt sensor mechanism, which is built into the cartridge. The [[PlayStation 3]]'s game controller also utilizes tilt as a means to play video games.
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| − | ==Usages==
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| − | Inclinometers are used for:
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| − | * Determining the angle of the earth's magnetic field in respect to the horizontal plane.
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| − | * Showing the inclination of an aircraft or ship relative to the horizontal. An [[fixed-wing aircraft|airplane]] instrument. See [[turn coordinator]] or [[slip indicator]][http://www.riekerinc.com/SlipIndicators.htm].
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| − | * Showing a deviation from the true vertical or horizontal.
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| − | * Surveying, in order to measure an angle of inclination or elevation.
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| − | * Rollover warning, to alert equipment operator of possible tip over condition.[http://www.riekerinc.com/TiltIndicators.htm]
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| − | * Measuring angles of elevation, slope, or incline, as of an embankment. Also called an inclinometer.
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| − | * Measuring slight differences in slopes, particularly for [[geophysics]]. Such inclinometers are, for instance, used for monitoring [[volcano]]es, or for measuring the depth and rate of landslide movement.
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| − | * Measuring movements in walls and/or the ground in civil engineering projects.[http://www.slopeindicator.com/instruments/inclin-intro.html]
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| − | * Determining the dip of beds or strata, or the slope of an embankment or cutting; a kind of plumb level.
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| − | * Some automotive [[safety]] systems.
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| − | * Indicating pitch and roll of vehicles, sail boats, and aircraft.
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| − | * Monitoring boom angle of cranes and material handlers.
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| − | * Measuring the "look angle" of a satellite antenna towards a satellite.
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| − | * Measuring the slope angle of a tape or chain during distance measurement.
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| − | * Estimating the height of a building, tree, or other feature using a vertical angle and a distance (determined by taping or pacing).
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| − | * Measuring the angle of drilling in well-logging applications.
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| − | * Measuring the height of trees or other poles.
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| − | * Measuring steepness of a ski slope. (<10 deg for beginners, 10-20 "green", 15-25 "blue", 25-35 "black", 35-45 "double black")
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| − | * Measuring the orientation of [[plane (mathematics)|plane]]s and [[lineation]]s in rocks, in combination with a [[compass]]. (see [[structural geology]])
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| − | === Factors which influence usage ===
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| − | (Overall accuracy varies depending on the type of inclinometer and technology utilized)
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| − | * Gravity
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| − | * Temperature (drift), zero offset, linearity, vibration, shock, cross-axis sensitivity, acceleration/deceleration
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| − | * A clear line of sight between the user and the measured point is needed.
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| − | * A well defined object is required to obtain the maximum precison.
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| − | * The angle measurement precision and accuracy is limited to slightly better than one degree of arc.
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| − | === Survey methods ===
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| − | * Inclinometers are used for the measurement of angles in reference to gravity.
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| − | * The [[United States Department of Agriculture|USDA]] [[United States Forest Service|Forest Service]] uses inclinometers to measure tree height in its [[Forest Inventory and Analysis]] program.
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| − | ==Manufacturers==
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| − | * [http://www.leica-geosystems.com/corporate/en/ndef/lgs_33357.htm Leica Nivel200 two-axis precision inclination sensor]
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| − | * [http://www.soldata.co.uk Sol Data Limited - Instrumentation and Monitoring Specialist]
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| − | * [http://www.gage-technique.com Gage Technique International - Geotechnical & Structural Instrumentation]
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| − | * [http://www.soil.co.uk Soil Instruments (UK) Ltd - Geotechnical & Structural Instrumentation]
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| − | * [http://pewa.panasonic.com/pcsd/product/sens/acce_sensor.html Panasonic Electric Works Corporation of America]
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| − | * [http://www.riekerinc.com Rieker Incorporated]
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| − | * [http://www.transportsupport.co.uk Transport Support - Vehicle Inclinometer Systems(A division of G.N.Systems Ltd)]
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| − | * [http://www.measurandgeotechnical.com Measurand Inc - Unattended 3D Slope Monitoring]
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| − | ==See also==
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| − | * [[Theodolite]]
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| − | ==External links==
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| − | *[http://www.inclinometer.blogspot.com Inclinometer Blog - General Inclinometer Information]
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| − | *[http://liftequipmentsafety.blogspot.com/ Safety Tips for Lift Equipment]
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| − | *[http://www.transportsupport.co.uk Transport Support - Specialist Inclinometer manufactures for the transport industry (A division of G.N.Systems Ltd.)]
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| − | [[Category:Dimensional instruments]]
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| − | [[Category:Inclinometers]]
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| − | [[de:Klinometer]]
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| − | [[fr:Inclinomètre]]
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| − | [[ja:クリノメーター]]
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| − | [[no:Klinometer]]
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| − | [[pt:Inclinômetro]]
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| − | [[sl:Klinometer]]
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