Principle of flame sensor
Release time：
2021-07-15
Flame sensor: It is composed of various combustion products, intermediates, high-temperature gases, hydrocarbons and inorganic substances. The thermal radiation of flame includes gas radiation of discrete spectrum and solid radiation of continuous spectrum. The flame radiation intensity and wavelength distribution of different burning materials are different. But generally speaking. They have great radiation intensity in the near-infrared wavelength region and the ultraviolet wavelength region corresponding to the flame temperature. Therefore, the flame sensor can be made according to this characteristic.
Flame Sensor< /span>:is composed of various combustion products, intermediates, high-temperature gases, hydrocarbons and inorganic substances composition. The thermal radiation of flame includes gas radiation of discrete spectrum and solid radiation of continuous spectrum. The flame radiation intensity and wavelength distribution of different burning materials are different. But generally speaking. They have great radiation intensity in the near-infrared wavelength region and the ultraviolet wavelength region corresponding to the flame temperature. Therefore, the flame sensor can be made according to this characteristic.
Far infrared flame sensor
Function:Far infrared flame sensor can be used to detect the wavelength of700 nm ~ 1000 nm Fire or other heat sources within the range. In the robot competition. The far infrared flame probe plays a very important role. It can be used as the eyes of a robot to find fire sources or football. It can be used to make fire-fighting robots, football robots, etc.
Introduction to the principle:Far infrared The flame sensor can detect the infrared light within the range of 700 nm ~ 1000 nm, the detection angle is 60°, the wavelength of infrared light is close880 nmThe sensitivity reaches the maximum. The far-infrared flame probe converts the intensity change of the external infrared light into the current change, which is converted by A/DThe converter reflects the value change within the range of 0 ~ 255. The stronger the external infrared light, the smaller the value; the weaker the infrared light, the larger the value.
Ultraviolet Flame Sensor
UV flame sensor can be used to detect fire source400 Thermal radiation below nanometers. Principle introduction:The detection angle can be set according to the actual situation by using lower ultraviolet light. When ultraviolet transmission and visible light absorption glass(filter)Can detect400 nm Wavelength within the range, the infrared wavelength is at350 nmWhen it is nearby, its sensitivity reaches its maximum. The UV flame probe converts the intensity change of the external infrared light into the current change, which is converted by A/DThe converter reflects the value change within the range of 0 ~ 255. The stronger the external ultraviolet light, the smaller the value; the weaker the ultraviolet light, the larger the value.
Description
< span style="font-family:宋体">Pay attention to the following points when installing the far infrared flame sensor:
a, remove the photosensitive sensor on the robot. Then connect the far infrared flame sensor directly to the photosensitive interface.
b, the pin of the far infrared flame sensor is polarity. The red wire is connected to the position marked "+" when installed on the motherboard; if it is in use There was no response during the process. Simply insert the sensor back.
c, in graphics programming, directly controlled by the "brightness detection module"; program the code box Time. Use feature photos(1) and photos(2) to check.
d, the working temperature of the far infrared flame probe is-25℃ ~ 85℃. It should be noted that the distance between the flame probe and the flame should not be too close to avoid damage.
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