With the increase of modern household fire and electricity consumption, the frequency of household fires is getting higher and higher. Once a home fire occurs, it is prone to unfavorable factors such as delayed fire fighting, lack of fire-fighting equipment, panic and delayed escape among the people present, and ultimately lead to major losses of life and property. Discussing the characteristics of home fires and fire prevention measures is of practical significance for preventing home fires and reducing fire losses.
Use introduction
Smoke alarms are divided into independent type, serial type, and network type
The smoke alarm is one of the most important means to prevent fires. Its function is to detect when a large amount of smoke causes a fire to generate an alarm. The sensitivity of the smoke alarm is considered according to the geographical location and the application environment. May achieve the effect that the user should have,
Fires occur almost simultaneously with the use of fire, and with the development of society, the increase in material wealth has caused more and greater harm. In particular, cities are characterized by dense buildings, concentrated population, concentrated property, a large source of inflammable and explosive materials, a large number of points, and a wide area, which brings more fire and abo bombing hazards. In the event of a fire or explosion, there will be heavy casualties and serious economic losses. Therefore, we must be aware of safety protection. According to a survey, 93% of households in the United States have at least one set of smoke alarms. The number of households with smoke alarms has increased, and the number of deaths caused by residential fires has been reduced by almost half. The smoke at the beginning of a fire will accumulate under the indoor ceiling. The smoke detector can monitor and detect the presence of smoke in real time, and periodically detect the environment every 45s; the alarm senses the discrete light source, tiny smoke particles and mist through the internal intelligent processor Once the smoke is detected, it will immediately output an alarm sound through a built-in dedicated IC drive circuit and an external piezoelectric transducer, so that people can learn about the fire early and extinguish the fire in its budding state.
What should be reported when reporting a fire alarm:
(1) The alarm person should pick up the fire truck at the intersection.
(2) The name, address and lian words of the caller
(3) Whether there are people trapped
(4) The specific time and place of the fire
(5) The basic situation of the fire
Low Noise Laser
The low noise issues of lasers are due to the competition of mode in Laser resonant cavity, which lead to high frequency jitter of output power. Through special design for laser resonant cavity and other components, the laser amplitude noise can be reduce efficiently. CNI low noise laser can be widely applied to DNA sequency, cell sorting, spectrum analysis, interference measurement, laser holography, photo processing and biomedical and other fields.
CNI offers low noise lasers in wavelengths from ultraviolet to infrared (360~1550 nm).
|
Features:
Beam spot pattern: TEM00
M²: <1.1
Pointing stability: <5μrad/℃
Constant temperature (23±3℃) noise: -52dB
Noise stability (RMS@4h): <0.2%
Bandwidth: 20Hz~20MHz
|
|
Examples of the testing results
|
|
|
|
Testing chart of noise stability
(RMS@2h 20Hz~20MHz)
|
Testing chart of noise stability in
variable temperature (10~35℃)
|
Testing chart of noise stability
in constant temperature (23±3℃)
|
Low Noise Laser,Noise in Laser Diodes,Solid Laser Beam,Wavelength of Red Laser
Changchun New Industries Optoelectronics Technology Co., Ltd. , https://www.lasersciences.com