A train reminder device with adjustable capacitance according to the received audio frequency

Abstract

The utility model discloses a train arrival reminding device capable of adjusting capacitance according to received audio change. The train arrival reminding device comprises an arm chair, a power supply is fixedly mounted on the side wall of the interior of the arm-chair, the power supply is fixedly connected with two symmetrical polar plates through wires, a fixed electrode and a metal film arefixedly arranged between the two symmetrical polar plates, the upper polar plate is fixedly connected with a resistor through a wire, the upper end of the resistor is fixedly connected with an electromagnet through a wire, two symmetrical fixed rods are fixedly arranged on the right side of the electromagnet, and a fixed sheet is fixedly arranged between the two fixed rods. Through cooperative useof the wire, the fixed electrode and the metal film, sound broadcasted by a trainman can be effectively converted into audio current, and then the audio current is converted into audio voltage through a resistor, so that the magnetic strength of an electromagnet is controlled, the movable rod moves leftwards and rightwards to knock a headrest, and a sleeping traveler is awakened.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a train arrival reminder device whose capacitance can be adjusted according to the audio frequency received. Background technique [0002] EMUs are one of the first-selected means of transportation for people to travel due to their comfort and high speed. However, most of the existing EMUs arrive at stations with conductors reminding the arrival of trains in the form of voice broadcasts, but the distance The journey is longer, and the passengers are more tired due to the rush of the journey. Most of them choose to rest their heads on the seat and rest for a while. Since there is an announcement at each stop, some people sit for more than one stop, so they generally sleep. It will be relatively heavy, and the sound broadcast in the train is not particularly loud. Generally, it will not exceed 60 decibels. Because the country stipulates that more than 60 decibels are considere...

AI Technical Summary

Problems solved by technology

[0002] EMUs are one of the first-selected means of transportation for people to travel due to their comfort and high speed. However, most of the existing EMUs arrive at stations with conductors reminding the arrival of trains in the form of voice broadcasts, but the distance The journey is longer, and the passengers are more tired due to the rush of the journey. Most of them choose to rest their heads on the seat and rest for a while. Since there is an announcement at each stop, some people sit for more than one stop, so they generally sleep. It will be relatively heavy, and the sound broadcast in the train is not particularly loud. Generally, it will not exceed 60 decibels. Because the country stipulates that more than 60 decibels are considered noise, it may not be able to wake up sleeping people. However, generally there are people at every station. Getting off the bus, the situation when getting off the bus is generally chaotic. At this time, it is also a good time for thieves to pickpocket. They may pickpocket those who are sleeping, and then take the opportunity to pickpocket and then get off the bus. Such news is not uncommon, and it is impossible to remind people to arrive at the station. Get out of the car and protect people's property

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