Working principle of burner flame detector
The working principle of the burner flame detector is to use a solid material as the sensing element, such as silicon carbide or aluminum nitrate, or use a gas-filled tube as the sensing element, such as a Geiger-Miller tube, to sense the 0.185- Ultraviolet radiation with a wavelength of 0.260 microns.
Flame radiation is gas radiation with discrete spectrum and solid radiation with continuous spectrum. Its wavelength is in the range of 0.1-10 μm or wider. In order to avoid the interference of other signals, ultraviolet rays with a wavelength of <300nm are often used, or unique in flames. The CO2 radiation spectrum with a wavelength around 4.4 μm is used as the detection signal.
The ultraviolet sensor only responds to the ultraviolet in the narrow range of 185~260nm, and is not sensitive to the light in other spectral ranges. It can be used to detect the ultraviolet in the flame. The sunlight that reaches the ground under the atmosphere and the non-purple-transparent material used as the electric light source of the glass bulb emit light with a wavelength greater than 300nm, so the 220m-280nm mid-ultraviolet band of the flame detection belongs to the blind zone of the solar spectrum (solar blind zone).
Ultraviolet flame detection technology enables the system to avoid the complex background caused by the most powerful natural light source, the sun, and greatly reduces the burden of information processing in the system. Therefore, the reliability is high. In addition, it is a photon detection method, so the signal-to-noise ratio is high, and it has the ability to detect extremely weak signals. In addition, it also has the characteristics of extremely fast response time.
Key points for flame detector installation:
1. The general principle is to install the detector at twice the height of the highest target in the protected area. It cannot be blocked by obstacles within the effective range of the detector, including transparent materials such as glass and other insulators. It can cover all targets and areas that need to be protected, which is convenient for regular maintenance.
2. After the detector is installed, it can be tilted downward by 30-45 degrees, which can not only look down, but also look forward, and at the same time reduce the possibility of mirror surface pollution. All possible fires within the protected area should be kept in a straight line to avoid indirect accidents and reflections.
3. In order to avoid detection blind spots, another flame detector is usually installed in the opposite corner. At the same time, it provides a backup should one of the flame detectors fail.
Working principle of burner flame detector
The working principle of the burner flame detector is to use a solid material as the sensing element, such as silicon carbide or aluminum nitrate, or use a gas-filled tube as the sensing element, such as a Geiger-Miller tube, to sense the 0.185- Ultraviolet radiation with a wavelength of 0.260 microns.
Flame radiation is gas radiation with discrete spectrum and solid radiation with continuous spectrum. Its wavelength is in the range of 0.1-10 μm or wider. In order to avoid the interference of other signals, ultraviolet rays with a wavelength of <300nm are often used, or unique in flames. The CO2 radiation spectrum with a wavelength around 4.4 μm is used as the detection signal.
The ultraviolet sensor only responds to the ultraviolet in the narrow range of 185~260nm, and is not sensitive to the light in other spectral ranges. It can be used to detect the ultraviolet in the flame. The sunlight that reaches the ground under the atmosphere and the non-purple-transparent material used as the electric light source of the glass bulb emit light with a wavelength greater than 300nm, so the 220m-280nm mid-ultraviolet band of the flame detection belongs to the blind zone of the solar spectrum (solar blind zone).
Ultraviolet flame detection technology enables the system to avoid the complex background caused by the most powerful natural light source, the sun, and greatly reduces the burden of information processing in the system. Therefore, the reliability is high. In addition, it is a photon detection method, so the signal-to-noise ratio is high, and it has the ability to detect extremely weak signals. In addition, it also has the characteristics of extremely fast response time.
Key points for flame detector installation:
1. The general principle is to install the detector at twice the height of the highest target in the protected area. It cannot be blocked by obstacles within the effective range of the detector, including transparent materials such as glass and other insulators. It can cover all targets and areas that need to be protected, which is convenient for regular maintenance.
2. After the detector is installed, it can be tilted downward by 30-45 degrees, which can not only look down, but also look forward, and at the same time reduce the possibility of mirror surface pollution. All possible fires within the protected area should be kept in a straight line to avoid indirect accidents and reflections.
3. In order to avoid detection blind spots, another flame detector is usually installed in the opposite corner. At the same time, it provides a backup should one of the flame detectors fail.