Work and Application of Infrared thermal imager Sensors

热成像设备具有24小时的工作能力，可以在各种气候条件下正常工作，因此对海军，陆军和空军等武装部队都是有益的。热探测器捕获 由零温度以上的所有物体产生的IR（红外）辐射。捕获部分的温差以百克表示。随着IR检测器技术的开始，具有运动部件和困难的低温的大型冷却的热检测器已经变成了没有运动部件的小型且较便宜的未冷却微测辐射热仪。热成像系统由于其众多优点而在军事上得到了广泛应用，并且也得到了定义。

它被武装部队广泛用于边境监视和法律实施。它也用于船舶事故避免和控制系统。在航空业中，它可以大大减轻夜间飞行的危险。它们广泛用于军事飞行中，以识别，发现和瞄准敌军。最近，它们也被合并到民航中以对飞机进行健康检查。

什么是热成像传感器？

热成像传感器是一种用于According to物体的绝对温度确定图像的传感器。图像是According to对象的热特征形成的。这些设备According to其热模式记录设备的当前签名，并且不需要诸如主动红外设备之类的光束。热成像的范围是-50oC至2,000oC。

热成像类型

热成像传感器分为两种类型，即冷却的热成像和非冷却的热成像。

冷却的热图像通常包含在真空密封的盒子中，并进行低温冷却。这些设备需要冷却以用于半导体材料的操作。否则，它们将被自身的辐射所蒙蔽。冷却的红外热像仪可提供出众的图像质量，体积庞大且生产和运行昂贵。冷却耗时且耗电。因此，相机需要一些时间来冷却后才能再次开始工作。

未冷却的热图像使用传感器，该传感器使用控制元件在环境温度或室温下运行。图像质量和分辨率往往低于冷却的检测器。未冷却的热像仪体积更小，生产和运行成本低。这些成像器的操作速度更快，并且功耗更低。

热成像传感器电路图

热手电筒的必需组件包括1个MelexisMLX90614非接触式IR测量设备（3v），共阳极RGB led-1、4.7k Ohm电阻器2、100 Ohm电阻器-2、180 Ohm电阻器-1、0.1μF电容器-1，电线，面包板，9v电池和支架

5.5V Melexis检测器和5.5V传感器的共阴极LED通常会造成手电筒的其他差异。

MLX90614的连接如下

• Pin 1 on MLX (SCL) connects to analog pin 5 on the Arduino UNO board, pin 2 on MLX (SDA) connects to analog pin 4 on Arduino, pin 3 on MLX (VDD) connects to 3.3V On the Arduino, connect Pin-4 on MLX (VSS) to GND on the Arduino board.

• Now, use "pull-ups" on the SDA and SCL lines by connecting a 4.7K ohm resistor from the Pin-3 VDD line to the SCC line and a 4.7K ohm resistor from the Pin-3 VDD line to the SDA line.

• Connect the RBG LEDs. Simple wiring diagram of RGB LED.

• Leg-1 = LED's RED pin connected to PWM pin 6, Leg-2 = Ground, Leg 3 = LED's green pin connected to PWM pin 5, Leg-4 = LED's blue pin connected to PWM pin 3.

• Dump the code into the microcontroller.

How does thermal imaging work?

• Infrared (IR) emissions produced by objects are focused using special lenses.

• The focused light is scanned by phased infrared Detector elements. These elements produce a greatly expanded temperature pattern known as a thermogram. It takes only a tenth of a second for the Detector array to acquire temperature data to form a thermogram. This temperature data can be found from thousands of points in the field of view of the Detector array.

• The thermogram formed by the Detector elements is converted into electrical pulses.

• The pulses are directed to a signal processing unit, a circuit card with a chip that reads the information from the fundamentals into data for display.

• The signal processing unit sends the data to the display, which looks several colors depending on the intensity of the infrared radiation. The combination of all pulses from all elements makes up the image. Checking everything during the day is straightforward, but at night, you won't see or see anything. This imaging allows you to see again.

Thermal Imaging Applications

Applications for thermal image sensors include the following

Applications of Thermal Imaging Sensors

• condition monitoring

• border security

• Security and Law Enforcement

• Energy losses in building and building envelope inspections

• heat map

• Digital Infrared Thermography in Healthcare

• veterinary thermal imaging

• night vision

• drone surveillance

• Research

• process control

• non-destructive testing

• Security, Law Enforcement, and Defense Surveillance

• volcanology

• chemical imaging

Advantages of Thermal Imaging Sensors

The advantages of thermal image sensing include the following

1. Make accurate, instant and fast temperature measurements and assist in fault detection

2. The camera is very easy to install and can take measurements at your convenience

3. It is capable of capturing moving targets in real time and in low light conditions

4. It can be used to observe or measure objects in otherwise inaccessible or hazardous areas

5. It can help identify air leaks, record irregular heat spread, and identify possible irregularities in the insulation.

6. The camera can passively observe all objects, regardless of ambient light

Based on the above information, finally we can conclude that "Thermal Imaging" is a method of increasing the brightness of an object by sensing its IR radiation in a dark environment and making an image based on that information. Three night vision technologies such as thermal imaging technology, low-light imaging and near-infrared lighting. Thermal imaging works in environments without any ambient light, such as near-infrared lighting, unlike the remaining two methods, which go into obscuring objects such as fog, smoke, and haze.