Abstract: An expanded solar alarm lamp includes a solar cell component, a solar battery, a main controller, a xenon tube lamp, a circuit board, and a PC housing. The solar battery is connected to the solar cell component for receiving solar energy from the solar cell component and storing the solar energy to a battery that supplies electric power to the alarm lamp. The main controller and xenon tube lamp are installed on the circuit board; the PC housing is used for wrapping the circuit board and installed at the top of a car body; the xenon tube lamp is for generating a warning light; and the main controller is for determining whether the electric power supply is provided by the solar battery which is the xenon tube lamp based on the current stored electricity of the solar battery. The invention improves the performance and function of the solar alarm lamp.

Abstract: An intelligent police car loudspeaker includes a loudspeaker mechanism composed of a dust cover, a paper cone, a yoke ring, a centering piece, a magnet, a voice coil, and a soft iron core. The voice coil is disposed around the soft iron core. The magnet is disposed around the voice coil. The paper cone is disposed above the magnet. The centering piece is disposed above the magnet and located inside the paper cone. The yoke ring is disposed above the centering piece and located inside the paper cone. The dust cover is configured to cover an opening of the paper cone. With the present invention, the level of intelligence of the loudspeaker can be improved.

Abstract: A solar speaker self-adjusting control system includes a photovoltaic panel, a voltage conversion device, a speaker device, an embedded processing device, and a calling device. The photovoltaic panel is for receiving solar energy and outputting a voltage signal; the voltage conversion device is connected to the photovoltaic panel for converting the voltage signal outputted by the photovoltaic panel into voltage values required by the system; the embedded processing device is connected to the calling device and speaker device for converting a voice signal transmitted from the calling device into a control current that drives the operation of the speaker device; and the calling device is embedded into a dashboard at a front end of the motor vehicle and connected to the embedded processing device installed in the dashboard at the front end of the motor vehicle through a cable. This system achieves the self-adjusting control effect of a solar speaker.