Air horn principle

The electric air horn generates compressed air through the air pump of DC motor, and then introduces the compressed air into the sounding device (copper plate, silicon plate or cardboard) of the air horn through the flame-retardant hose to make sound, and then amplifies the sound through the sound amplifying port to realize the alarm and warning functions. The electronically controlled air horn consists of two to four or more horn tubes, and the air pressure is provided by the air pump (brake air pump or electric air pump) provided by the automobile.

Extended data:

First, the maintenance of air horn:

When the air pressure is 392kPa, the sound of the air horn is louder. There are screws for adjusting sound on the pneumatic horn. Loosen the lock nut, adjust the adjusting screw repeatedly, adjust the sound to the best, and then lock the nut.

The air horn doesn't sound or the sound quality is poor, which is generally caused by low air pressure or poor horn adjustment, serious air leakage of button or hose, dirty airway, blocked horn tube, inability to exhaust or trachea falling off, water inlet of horn, corrosion and cracking of diaphragm, etc.

Clean the surface mud during maintenance; After decomposition, it is found that the diaphragm is rusted or damaged, so replace it. When cleaning the vehicle daily, do not inject water into the horn shell to avoid affecting its sound. The QL 1 1 air horn needs a pressure of 294~980kPa to sound normally.

Second, the principle of horn sound

A loudspeaker is actually a conversion device that converts electric energy into sound. When different electric energy is transmitted to the coil, the energy generated by the coil interacts with the magnetic field of the magnet to make the paper tray vibrate. Because the electronic energy changes at any time, the coil of the horn will move forward or backward, so the paper tray of the horn will also move with it, which changes the density of air and produces sound.

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