The operator uses the image color displayed on the screen and the hot spot tracking display function to preliminarily judge the heating situation and the fault location, and at the same time strictly analyze, so the thermal temperature camera has the advantages of high efficiency and high accuracy in confirming the problem. When using an infrared camera for inspection, the following factors will directly affect the shooting effect.

Optical focus

Focusing is very important for analyzing the spectrum. If the measured object is not well focused, it will affect the accuracy of the spectrum analysis and temperature measurement. When an object is focused, its edges are very clear and well-defined. The operation of optical focusing is similar to that of a visible light camera.

Thermal focus

Thermal focus is very important for taking a clear thermal image. For frozen or saved images, thermal focus is also a parameter that cannot be changed.

Measuring range: The correct measuring range must be selected before measuring the object, and the selection of high temperature section/low temperature section.

Range (thermal contrast): It refers to the highest temperature/lowest temperature of the measured object.

Energy (thermal brightness): Adjust the position of the range within the selected range.

The choice of lens

Telephoto lens: generally a lens less than 10 degrees, suitable for long-distance measurement, used for high-voltage line insulation detection/transformer, etc.

Wide-angle lens: generally a lens larger than 30 degrees, suitable for industrial inspection and architectural inspection.

Color palette

The effect of color palette on image clarity: Generally, gray and white are used to assist focusing, and then the color is converted for thermal focusing.

Emissivity

Emissivity refers to the ability of an object to emit energy. The surface of most objects cannot emit 100% of the energy.

Transmittance: For infrared signals, most objects are opaque. All infrared measurements cannot penetrate the object.

Reflectivity: refers to the ability of the surface of an object to reflect heat. Low emissivity can lead to reflectivity problems. The background reflection of the surrounding environment will make the surface of the measured object "hotter" or "cooler" measurement artifacts.

Emissivity adjustment

Emissivity correction: In order to measure the temperature of an object more accurately, the emissivity of the object must be confirmed and set in the instrument.

The entered emissivity value is used to correct the energy lost on the surface of the object. For example, when the emissivity of the measured object is 0.8, the correction value of the temperature sensor camera is 20%. For example, if the surface temperature of an object is 100 degrees, ε=0.8, the infrared temperature cameras can only read 80 degrees at this time, and if the emissivity parameter is set to 0.8, the temperature sensor cameras will automatically adjust the reading by 20%, thus Get 100% temperature value.

Generally, objects with high emissivity, such as wood, paper, etc., can easily obtain high-quality heat maps and can be measured more accurately.

Generally, objects with low emissivity, such as metal or polished material surfaces, are difficult to measure when the emissivity of the measured object is lower than 0.5. For high reflectivity, the temperature of the background reflection must be considered.

Launch temperature compensation

Emission temperature compensation refers to background reflection. Background reflection means that there are other radiation sources around the measured object, and energy can be collected by the infrared temperature camera. This part of the thermal energy is called background reflection.Regardless of high temperature or low temperature, it constitutes a background reflection, and environmental factors that are difficult to control, such as the sky, often appear during the inspection. For accurate measurement, this must be taken into consideration.

Before we start using the thermal imaging camera, we need to adjust the above influencing factors to prevent deviations in the final inspection results. If you want to get more knowledge about infrared camera after reading the above content, you can get professional solutions by practicing us.

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