XEAST let you know the Thermal Imager in a minute

With the increasing aging of society, more and more people like to keep pets,in this way, there is an additional “companionship” around us. But with it comes the loss of pets and their entry into narrow small or hidden spaces, such as cats hiding under cars Discs,entering ceiling duct compartments etc., are completely invisible, making pet enthusiasts feel overwhelmed. 

In a similar situation, in the maintenance environment of the power industry, it is also the same. Without knowing or knowing the cause of the fault, it is impossible to accurately locate the damaged location, and it is necessary to disassemble the equipment,Clear vision is the only way to detect and remove obstacles.

But if we look at it from the perspective of thermal imaging camera, we will see another scenario where "hot eyed golden eyes" are no longer a myth, and guessing objects through space is no longer a martial arts trick. Various types of detection and observation work have become easier and more comfortable, but also safer.

Can you guess what animals these are? How were these photos taken?

Besides being interesting, what other information can be conveyed in the picture?

Next, let's start with the infrared thermal imager that takes photos.

So, what is an infrared thermal imager? What are the advantages compared to traditional detection tools? What can we do with it, how does it operate and "work", and how does it ensure the safety of workers and electrical equipment? How to play an indispensable role in daily maintenance?

Infrared thermal imager is a device used to detect the infrared radiation of a target object and convert it through photoelectric conversion,electrical signal processing and other means,converts the temperature distribution of the target object into an image.

The Development of Infrared Thermal Imagers

Advantages of infrared thermal imagers

Safe-Non-contact detection, suitable for various working environments

Fast- Surface measurement without the need for point by point scanning, millisecond level reaction speed, improving work efficiency

Omission-Free visual image display of overall temperature distribution, real-time problem detection

Main performance parameters

Infrared Pixel Resolution, also known as pixels, directly affects the final imaging result

The mainstream detector resolutions of infrared thermal imagers include 160x120, 240x180, 320x240, 384x288, 640x480, and so on.

● Temperature Range The range of temperature measurement

Low range: -20 ℃ to 150 ℃ (-4 ° F to 320 ° F)

High range: 0 ℃ to 650 ℃ (32 ° F to 1202 ° F)

Ultra high temperature: -20 ℃ to 1500 

● The field of view angle and spatial resolution (IFOV)-- It is related to the size and distance of the target, and appropriate lens selection is necessary

Spatial resolution=pixel size/focal length. The smaller the spatial resolution, the larger the focal length. 

Field of view angle=Spatial resolution x pixels. The smaller the spatial resolution, the smaller the field of view angle

This is the principle we often say that the larger the focal length, the smaller the field of view angle.

● Accuracy ±2 ℃ or 2 ℃, whichever is the maximum reading (international standard)

The higher the accuracy requirement for temperature measurement, the higher the requirements for temperature measurement technology, image algorithm technology, and

The higher the requirements for infrared detectors.

● Frame rate The frequency at which the detector samples images per second

The higher the frame rate, the more accurate the display and the more continuous the image. The frame rate of a thermal imager is generally 9-60Hz, and the higher the frame rate of a thermal imager with the same pixel, the more expensive it is.

Testing capability of infrared thermal imagers

How far can a thermal imager measure

Detection distance=measured target size angular resolution

The smaller the angular resolution, the farther the distance that can be detected.

The size of the clamp for transmission lines is generally 50mm. If a measured thermal imager is used with an IFOV of 2.5mRad, the detection distance is 50 ÷ 2.5=20m.

How small a target can a thermal imager measure

Minimum detection target size=angular resolution * minimum focus distance.

The smaller the angular resolution, the smaller the minimum focus distance, and the smaller the detectable target.

How Clear Can a Thermal Imager See

A. The thermal sensitivity determines the ability of an infrared thermal imager to distinguish fine temperature differences.

Under different thermal sensitivities, the image effects presented are also completely different, and the number of sensitivities

The smaller the value, the greater the thermal sensitivity

Okay, the clearer the picture.

B. The minimum detection size determines the ability of a thermal imager to capture small dimensions.

The smaller the minimum detection size, the more pixels the same area of the detection target image consists of, resulting in a clearer image.

The influencing factors of infrared thermal imagers

● Temperature

Objects above absolute zero (-273 ℃) will emit infrared radiation. The actual measured temperature should be based on the range.

● Electromagnetic radiation

Electromagnetic radiation interference thermal imagers need to meet two conditions simultaneously: a consistent frequency and sufficient power, both of which are indispensable. At present, it has been confirmed that there is only one situation that meets this condition, which is the high-power thyristor rectifier cabinet on the electrolytic aluminum site.

Looking unattractive, the DC current intensity during operation is as high as 200000 amperes, surpassing the 500KV power plant completely

● Exercise

The higher the frame rate of the thermal imager, the higher the allowed motion speed.

The speed of object movement is higher than the reaction speed of the thermal imager, and there will be a tailing phenomenon.

The phenomenon of blurring the image marked by the arrow is called trailing

Selection of thermal imagers

Is there a multifunctional, high-precision, and high-performance thermal imager that is suitable for testing needs in multiple fields?

Let me recommend a high-end industrial intelligent infrared thermal imager,The comprehensive performance of both the technical and product ends is quite good! You are welcome to check our XE-26/27/28,XE-29/30 and XE-31/32/33,thanks.