The Construction and Principle of Air Defense Alarm
3, power supply system and sub-power supply and self-powered two.
2, control equipment is divided into two kinds of wired control and wireless control.
1, the alarm is divided into electric alarm, electro-acoustic alarm, hand alarm three. The electric alarm is composed of the motor as the main device of the alarm, the mechanical energy into the sound; the electro-acoustic alarm is composed of the host amplifier and the speaker; the hand alarm is the electric alarm and the electro-acoustic alarm supplementary warning equipment.
1, electric alarm: the electrical energy into mechanical energy, and then converted into acoustic energy by the mechanical energy. 2, electro-acoustic alarm: the audio small signal amplified by low-frequency power into sound energy. That is, electrons can be converted into acoustic energy. 3, pneumatic alarm: the electrical energy into mechanical energy, and then converted into mechanical energy by the mechanical energy. From gas to energy.
