With the development of science and technology, more and more smart cities are gradually used, and smart manhole covers are widely used in urban life. The intelligent manhole cover can solve the problem of hard to be held responsible for the damage of the manhole cover, so as to avoid the delay of rush repair time. If the manhole cover is damaged or stolrn, if it is not handled in time, it will become a "city black hole", with great potential safety hazards. Therefore, the missing or damaged manhole cover should be promptly alerted, and the maintenance personnel should go to the site for treatment after receiving the alarm, which improves the operation and maintenance efficiency. It also quickly eliminated the hidden danger. Therefore, the main function of the intelligent manhole cover at present is to monitor whether the main cover is opened to prevent external breakage, to monitor the abnormal sub cover (inclination angle and impact) to judge whether the manhole cover is damaged, to prevent invasion, to monitor whether there is illegal entry and underground environment monitoring: temperature: to monitor whether there is abnormal temperature under the manhole cover; water level: to monitor whether the water level under the
manhole cover is out of limit Gas: monitoring whether the content of dangerous gases (combustible, carbon dioxide, toxic gas) exceeds the standard. For more than ten years, we have focused on the manufacture of manhole covers, and produced various resin manhole covers without anti manhole covers.
