Wireless anti-theft alarm terminal for well lid

Abstract

A wireless burglar alarm terminal used in a manhole cover comprises an outer box. The outer box comprises an upper cover (1) and a lower cover (2). The upper cover is connected with the lower cover by a screw connection, which have a very good waterproof and moisture-proof effect. A fixed connection structure (6) is set inside the upper cover (1) of the outer box and is respectively connected and fixed with a power switch (13) and a circuit board (14) by screws. A power supply slot (11) is set inside the upper cover of the outer box, and a power supply (12) is set inside the power supply slot. The power supply is connected with a power switch by wires, the power switch is connected with a circuit board by wires, and the power switch is a gravity conductive ball slide switch. Adjacent wireless burglar alarm terminals with the circuit board can build network automatically. The circuit board is connected with an antenna by wires. An external power connection device (16) is set inside the upper cover, and a metal device (7) connected with the antenna is set inside the upper cover. The use of the gravity conductive ball slide switch results in low power consumption, use safety, automatically monitoring the open condition of the manhole cover, independently choosing the location of the antenna according to the external environment, strong signal, and normal use even in the harsh natural environment.

Description

technical field [0001] The invention relates to a wireless anti-theft alarm terminal on a manhole cover. Background technique [0002] As an indispensable part for the normal operation of the city, the manhole cover also has considerable economic value. Due to the special nature of the work of the manhole cover, the material for making the manhole cover must be a heat-resistant and cold-resistant metal material with relatively high hardness. Such a manhole cover It has a certain economic value, and the setting of the manhole cover facilities is removable, which will give criminals an opportunity to steal a large number of manhole covers, which will not only cause economic losses to the country and the people, but also to people. Generally, terminals with anti-theft alarm function use mechanical switches to judge the opening state of the manhole cover. There are problems such as non-waterproof, easy short circuit due to water ingress, short battery life, wired connection, and...

AI Technical Summary

Problems solved by technology

[0002] As an indispensable part for the normal operation of the city, the manhole cover also has considerable economic value. Due to the special nature of the work of the manhole cover, the material for making the manhole cover must be a heat-resistant and cold-resistant metal material with relatively high hardness. Such a manhole cover It has a certain economic value, and the setting of the manhole cover facilities is removable, which will give criminals an opportunity to steal a large number of manhole covers, which will not only cause economic losses to the country and the people, but also to people. Generally, terminals with anti-theft alarm function use mechanical switches to judge the opening state of the manhole cover. There are problems such as non-waterproof, easy short circuit due to water ingress, short battery life, wired connection, and low switch sensitivity in winter. Disadvantages, the requirements for the environment are very high, and the service life of the anti-theft alarm device is reduced under harsh conditions. The existing anti-theft terminal uses GPRS communication, which has high communication and maintenance costs, and a lot of manpower and material resources are required to manage the SIM card of the GPRS module. The disadvantages greatly increase the cost of use, which is not conducive to the promotion of manhole cover anti-theft alarm devices

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