69results about How to "Avoid driving safety hazards" patented technology

The present invention provides a method and device of adjusting the volume of a vehicle-mounted player. The method comprises the steps of obtaining the vehicle information of a vehicle; finding a volume value corresponding to the vehicle information in a preset calibration table, wherein the vehicle information and the volume values are stored in the calibration table correspondingly; according to the volume value, adjusting the volume of the vehicle-mounted player. According to the present invention, the problem that drivers adjust the volume frequently and manually, so that the drivers divert attentions to cause the driving potential safety hazards, is avoided, the volume values of the players of the vehicles can be adjusted automatically according to the vehicle information, the drivers can drive safely, the entertainment experiences of users are increased, and users can enjoy the driving fun brought by the players better.

The invention provides a device for performing automatic Bluetooth pairing and connection on a mobile phone and a vehicle-mounted display terminal in a screen projection state. The device comprises ascreen projection service module and a mobile phone Bluetooth module in the mobile phone, and a screen projection receiving module and a vehicle-mounted display terminal Bluetooth module in the vehicle-mounted display terminal, wherein a communication channel is arranged between the screen projection service module and the screen projection receiving module, a Bluetooth pairing information input end of the screen projection receiving module is connected with a Bluetooth pairing information output end of the vehicle-mounted display terminal Bluetooth module, the Bluetooth pairing information output end of the screen projection receiving module is connected with the Bluetooth pairing information input end of the mobile phone Bluetooth module, the mobile phone Bluetooth module is in Bluetoothcommunication connection with the vehicle-mounted display terminal Bluetooth module, the device can automatically perform the fast pairing between the mobile phone Bluetooth and the vehicle-mounted display terminal Bluetooth during the screen projection of the mobile phone and the vehicle-mounted display terminal, thereby facilitating the transmission of sound signals between the mobile phone andthe vehicle-mounted display terminal.

The invention relates to a ground temperature-regulating snow-melting device utilizing natural geothermal energy and its application, belonging to a geothermal utilization system, in particular to a snow-melting device for snow and ice removal. It includes a heat collection part and a heat dissipation part. The heat collection part is connected with the heat dissipation part through the output pipe and the return pipe to form a closed circuit. The characteristic is that the circuit is equipped with a low boiling point working fluid. The cooling tube is connected with the collecting tube through the return part, the collecting tube is located under the cooling tube, the two ends of the cooling tube are respectively connected with the output tube and the return part, and the two ends of the collecting tube are respectively connected with the return part and the return part. The upper ends of the pipes are connected, and the collecting pipe is continuously inclined downward from the return part to the return pipe, and the inclination is less than 1:10. The invention utilizes the heat medium with a low boiling point in the heat collector to absorb underground heat energy, and the heat medium after absorbing heat and gasification directly transmits heat to the radiator installed under the ground or road surface, so as to prevent frost and snow from remaining on the ground or road surface Or the effect of melting frost and snow, it does not consume extra energy, is environmentally friendly and economical, and can ensure the smooth flow of roads.