Where are infrared sensors used? Application Notes of Infrared Sensors
June 15,2022
single beam infrared sensor,high temperature infrared sensor,digital infrared sensor
A digital infrared sensor is a sensor that uses the physical properties of infrared rays to measure. Infrared light, also known as infrared light, has the properties of reflection, refraction, scattering, interference, and absorption. Any substance, as long as it has a certain temperature above absolute zero, can radiate infrared rays. The infrared sensor does not directly contact the measured object during measurement, so there is no friction, and it has the advantages of high sensitivity and fast response.
Where is the high temperature infrared sensor used?
1. Flame detector The flame sensor uses infrared rays to be very sensitive to flames. It uses a special infrared receiver tube to detect the flame, and then converts the brightness of the flame into a high and low level signal, which is input to the central processing unit. The controller makes corresponding program processing according to the change of the signal.
The flame sensor can detect infrared light with a wavelength in the range of 700 nanometers to 1000 nanometers, and the detection angle is 60°.
The far-infrared flame probe converts the change of the intensity of the external infrared light into the change of the current, which is reflected as the change of the value in the range of 0 to 255 through the A/D converter. The stronger the external infrared light, the smaller the value; the weaker the infrared light, the larger the value. The infrared ranging sensor uses the principle that the intensity of the reflection of the infrared signal is different at different distances from the obstacle to detect the distance of the obstacle.
The infrared ranging sensor has a pair of infrared signal transmitting and receiving diodes. The transmitting tube emits infrared signals of a specific frequency, and the receiving tube receives the infrared signals of this frequency. When the infrared detection direction encounters obstacles, the infrared signals are reflected back and received. The tube receives, after processing, returns to the central processing unit through the digital sensor interface, and the central processing unit can use the infrared return signal to identify changes in the surrounding environment.
2. Infrared thermometer The infrared thermometer is mainly composed of optical system, modulator, infrared sensor amplifier, indicator and other parts. Infrared sensors are devices that receive target radiation and convert them into electrical signals.
3. Infrared imaging In many occasions, people not only need to know the average temperature of the surface of the object, but also the temperature distribution of the object to analyze, study the structure of the object, and detect internal defects. Infrared imaging can visually display the temperature distribution of an object in the form of an image.
The attention problem of single beam infrared sensor application Infrared sensor is a very important component in the infrared detection system, but it is very delicate, if not pay attention in use, it may lead to damage to the infrared sensor. Therefore, the infrared sensor should pay attention to the following points in use:
1. You must first pay attention to understand the performance indicators and application scope of the single beam infrared sensor, and master its use conditions.
2. Pay attention to the working temperature of the sensor. Generally, an infrared sensor that can work at room temperature should be selected for easy maintenance.
3. Properly adjust the working point of the high temperature infrared sensor. In general, the sensor has an optimal operating point. Only when working at the best working point, the signal-to-noise ratio of the infrared sensor is ZUI.
4. Select the appropriate preamplifier to cooperate with the infrared sensor to obtain the best detection effect.
5. The modulation frequency matches the frequency response of the digital infrared sensor.
6. The optical part of the sensor cannot be touched or wiped by hand to prevent damage and contamination.
7. Pay attention to moisture-proof, anti-vibration and anti-corrosion when storing the sensor.