Because there are multiple sources of the infrared energy, it is difficult to get an accurate temperature of an object using this method. A thermal imaging camera is capable of performing algorithms to interpret that data and build an image. Although the image shows the viewer an approximation of the temperature at which the object is operating, the camera is actually using multiple sources of data based on the areas surrounding the object to determine that value rather than detecting the actual temperature. An influential method of practically monitoring, sensing, and recording the heat and temperature of your machinery.We use it as an effective way of assisting us in troubleshooting any electrical, mechanical, and structural system. All objects emit infrared energy (heat) as a function of their temperature. The infrared energy emitted by an object is known as its heat signature. In general, the hotter an object is, the more radiation it emits. A thermal imager (also known as a thermal camera) is essentially a heat sensor that is capable of detecting tiny differences in temperature. The device collects the infrared radiation from objects in the scene and creates an electronic image based on information about the temperature differences. Because objects are rarely precisely the same temperature as other objects around them, a thermal camera can detect them and they will appear as distinct in a thermal image.
* Advantages of thermography :
• It shows a visual picture so temperatures over a large area can be compared.
• It is capable of catching moving targets in real time.
• It is able to find deteriorating, i.e., higher temperature components prior to their failure.
• It can be used to measure or observe in areas inaccessible or hazardous for other methods.
• It is a non-destructive test method.
• It can be used to find defects in shafts, pipes, and other metal or plastic parts.
• It can be used to detect objects in dark areas.

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