Track distribution type electromagnetic induction charging device and charging method for underground tunnel

Abstract

The invention discloses a track distribution type electromagnetic induction charging device for an underground tunnel. The track distribution type electromagnetic induction charging device comprises a plurality of protection circuits, a plurality of primary inductors, a secondary inductor, a rectification filter circuit and a charging management circuit, wherein an input end of each protection circuit is the input end of an alternating current power supply; the primary inductors and the secondary inductor are connected in an electromagnetic induction mode; an output end of the charging management circuit is a charging output end; a plurality of primary inductors are fixedly connected with a track in the underground tunnel respectively and arranged in sequence; and the secondary inductor, the rectification filter circuit and the charging management circuit are arranged in a vehicle to be charged. The invention also discloses a charging method. The charging method comprises the following steps of: acquiring a charging start signal; starting charging; performing constant-current charging; starting performing constant-current charging when the voltage of a battery is more than 14.4 V; and finishing charging when charging current is less than 0.05 A. By the invention, non-contact high-efficiency charging is realized, and an explosion safety accident caused by contacting charging sparks in the tunnel is avoided.

Description

technical field [0001] The invention relates to a charging device and a charging method for an underground tunnel, in particular to a track distributed electromagnetic induction charging device and a charging method for an underground tunnel. Background technique [0002] In many underground tunnels such as coal mines, sewers and power tunnels, there is an urgent need for some track-type video surveillance equipment with a large moving range. However, the power supply of mobile video monitoring equipment has become an obstacle that restricts this type of product from entering the practical stage. [0003] In the current track-mounted video surveillance equipment of this type, the power supply mainly has the following schemes: (1) Power supply by tail-drag power supply cable; (2) Power supply by trolley line and collector; (3) Power supply by current Transformer induction power supply. When the above three power supply methods are used in underground tunnels, they all have ...

AI Technical Summary

Problems solved by technology

When the above three power supply methods are used in underground tunnels, they all have the defects that they cannot operate normally and safely: (1) For the power supply by tail-drag power supply cable, its main disadvantage is: the range of movement is limited, because the load of the rail car follows the track. As the load increases, the driving capacity of the track, the power supply cable, the rail car, the weight of the rail car, and the power consumption will all increase greatly, which will eventually lead to a significant decrease in the practicability under long distances; (2) for The main disadvantage of the trolley line and collector power supply method is that it cannot be explosion-proof, and there is a huge risk in mines, sewers and power tunnels, because combustible gases such as CO, CH4, and H2S may appear at any time in these places, and The unreliable connection power supply method of trolley line and collector may cause sparks and explosions due to poor contact; (3) For the current transformer induction power supply method, its main disadvantages are: low output power and low cost performance. In the current power supply mode, when the primary side current is as high as 50A or more, the output power of the transformer is only 8W. On the one hand, the power of 8W is not enough to drive the track video surveillance vehicle. On the other hand, such a large current, accessories and construction costs It is also very expensive. In addition, the current transformer induction power supply method, once the primary side is open circuit or the secondary side will appear ultra-high voltage, there are risks to personal and equipment safety.

[0004] In summary, the existing rail-mounted video surveillance equipment cannot be used normally and safely in underground tunnels, which is in contradiction with the urgent need for some rail-mounted video surveillance equipment with a large moving range

However, there is no technical solution to the above problems reported in patent and non-patent literature, and there is no precedent for the application of technical solutions to the above problems

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