thermograph


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thermograph

[′thər·mə‚graf]
(engineering)
An instrument that senses, measures, and records the temperature of the atmosphere. Also known as recording thermometer.
(optics)
A far-infrared image-forming device that provides a thermal photograph by scanning a far-infrared image of an object or scene.

Thermograph

 

an instrument for the continuous recording of the temperature of air or water.

The sensing element of a thermograph may be a bimetallic strip or a liquid or resistance thermometer. In meteorology, the most common thermograph has a sensor in the form of a bent bimetallic strip, which is deformed upon a change in temperature. The movement of the end of the strip is transmitted to a pointer, which traces a curve on a roll of graph paper. A vertical displacement of 1 mm on the recording corresponds to about 1°C.

A distinction is made between day and week thermographs, depending on the time required for a complete rotation of the recording drum. The operation of a thermograph is monitored by comparison with a mercury thermometer.

REFERENCE

Sternzat, M. S. Meteorologicheskiepribory i nabliudeniia. Leningrad, 1968.

thermograph

thermographclick for a larger image
An instrument for providing a continuous record of temperature, typically air temperature. The recording is done on a graph mounted on a drum, which is rotated by clockwork. Two metals of different alloys are welded together in a coil form. The difference in the coefficient of expansions expands or tightens the coil when subjected to temperature changes. This movement is magnified by a lever system attached to the coil with a pen nib slightly resting on a chart.
References in periodicals archive ?
Again, indices "A" to "H" presented in Figure 6(b) define the instances of the thermographs in Figure 6(a).
Musculoskeletal inflammation can also documented By abnormal thermograph of spines, shoulders, hips, and anywhere else in the body.
Although the thermograph we placed on the ark shell bed only functioned from July to December 2002, the record was sufficient to show that the temperature record from the NOAA satellite provided a good approximation of temperatures at our study site (Fig.
Instead, it tells where there is moisture in the insulation - when wet insulation appears on the thermograph, it can be assumed moisture is leaking from the area near that insulation.
The crystallite orientation factor (Table 2) calculated in accordance with Herman's method increased from 0.8826 to 0.8936 when the draw ratio was changed from 30X to 40X.The peak melting temperature of the 40 X drawn fiber is 144[degrees]C (determined from the DSC thermograph in Fig.
Tenders are invited for 7 Day Circular Chart Thermograph For Blood Bank Refrigerator,Temp Range -50 To 50 C, Clockwise Rotation,Pack Size 52 Charts Per Pack
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There are four steps in the thermograph of PAA and NCs: (1) removal of water and elimination of aliphatic units of coupling agents; (2) exclusion of bulky pendent units; (3) thermal imidization of PAA to PI, and (4) degradation of the main chain of the polymer matrix.
From the infrared thermograph of the film bubble, the film's temperature varied around the die exit where the brighter regions indicate the film sections with higher temperatures (Fig.
To draw a meaningful comparison, each thermograph was normalized by the weight of the sample.
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It also reported inconsistent interpretation of the thermograph. The most recent systematic review available on the modality was published in 2012.