Warning device applied to top of police vehicle

Abstract

The invention discloses a warning device applied to the top of a police vehicle. The warning device comprises a supporting plate, a bearing seat, a rotating shaft, a stepping motor, a directional sound transmission mechanism, a strong searchlight and a display screen, wherein the directional sound transmission mechanism comprises a signal processing module, a power amplifier, an ultrasonic transducer array plate and a shell; the supporting plate is fixed on the top of the police vehicle through a pillar; both the stepping motor and the bearing seat are fixed on the top of the police vehicle; one end of the rotating shaft is located in the bearing seat, and the other end penetrates through the supporting plate and then is fixedly connected to the lower part of the shell; a worm gear is arranged on the rotating shaft, and a worm is fixedly connected to a piston rod of the stepping motor; the strong searchlight is fixed on the upper part of the shell, and the display screen is fixed at the front end of the top of the police vehicle. According to the warning device applied to the top of the police vehicle, light warning and directional sound warning are effectively combined into the police vehicle, so that a policeman can perform directional warning for any direction in a task execution process, thereby achieving the aim of improving a warning effect.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to an alarm device used on the roof of a police car. Background technique [0002] Police car refers to the motor vehicles used by public security organs, national security organs, prisons, reeducation-through-labor management organs, people's courts, and people's procuratorates to perform emergency duties. [0003] Police cars are usually equipped with warning lights and sirens. For example, the prior art of CN201923011U disclosed a sound and light alarm lamp for electric police cars on August 10, 2011, which includes a light pole connected to the frame of the electric police car. And the warning light, the light pole is set in the outer pole by the inner pole and the inner pole is lifted up and down in the outer pole and locked by the locking nut. The inner pole is connected to the alarm through the base, and the shell at the bottom of the alarm is uniformly arranged There are multiple...

AI Technical Summary

Problems solved by technology

However, the existing technology represented by the police car still has the following two problems in the actual use process: the first is that the warning effect of the daytime police light alarm is weak, and the deterrent effect is not strong; the second is the sound transmission of the traditional loudspeaker Dispersion, the sound wave is easy to weaken and the effect is not good

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