3 results about "Open air environment" patented technology

The utility model discloses a waterproof lamp belongs to the field of lighting appliance, including the lamp cup, install the rotary ring on the lamp cup, install the adjusting switch in the lamp cup, the inboard of rotary ring is equipped with the adjusting portion with the position adaptation of adjusting switch, still be equipped with the movable opening at the adjusting switch on the lamp cup, be equipped with the waterproof tank between rotary ring and the lamp, install the sealing washer in the waterproof tank, through setting up the waterproof tank and sealing washer between rotary ring and the lamp, the rainwater is blocked to enter the lamp cup inside, avoids the lamp damage, has solved the problem that the lamp with the knob under the open -air environment of prior art is easy to damage due to the lack of waterproof structure, the water.

The utility model provides a large -scale steel structure beam strain distribution type intelligent monitoring system, include: distribution type strain sensing module, data acquisition and transmission module, data analysis and diagnosis module, intelligent early warning module and protection and installation module, wherein, distribution type strain sensing module is used for realizing the strain collection of steel structure beam, data acquisition and transmission module is used for transmitting the data of distribution type strain sensing module collection to remote server, data analysis and diagnosis module is used for carrying out analysis and diagnosis to the steel structure beam data of collection, intelligent early warning module is used for sending early warning signal according to analysis diagnosis result, protection and installation module is used for guaranteeing the stable operation of equipment under the open environment. The utility model solves the problem that traditional monitoring system wiring is complex, environmental suitability is poor, diagnosis is lagging behind etc. can be widely used in the safety monitoring of large -scale steel structure beam's construction period and operation period.

This invention discloses a method, system, and equipment for determining the safe distance of air shock waves during tunnel blasting excavation, relating to the field of tunnel blasting excavation. The method includes: determining the overpressure safety control standard ΔP0 for air shock waves; calculating the overpressure ΔP1 of the air shock wave propagating along the tunnel and the overpressure ΔP2 of the air shock wave at the tunnel entrance based on blasting design parameters and tunnel characteristic parameters; calculating the overpressure ΔP3 of the air shock wave at any distance along the tunnel axis in an open-air environment at the tunnel entrance based on ΔP2; drawing a nomogram of the safe distance of the air shock wave action within the tunnel based on ΔP0 and ΔP1, and determining the first safe distance based on the nomogram; drawing an isopleth map of the air shock wave overpressure based on ΔP3, and determining the second safe distance based on ΔP0 and the isopleth map. This invention eliminates the need for extensive blasting tests, providing a new approach for the safety protection of blasting air shock waves near the tunnel face and entrance.