Device and method for construction machine positioning and safety area monitoring

Abstract

The invention discloses a device for positioning a construction machine and monitoring its safety area and a method for using the same. The purpose is to monitor the working position of the construction machine or its moving parts to ensure that it is in the safety area. The present invention adopts the scheme of laser ranging and image recognition and tracking, and calculates the relative coordinates of the construction machine by measuring the distance from the construction machine to the image acquisition device and related angles, and judges whether it is within the set safe area. This solution includes a ranging target, a laser rangefinder, a two-axis pan / tilt, an image acquisition device, a target recognition unit, a pan / tilt control unit, an angle measurement device, a position calculation unit, a communication device, a safe area discrimination unit, and an alarm device. The application of the device and method of the invention can reduce construction accidents, reduce property losses and casualties, and overcome the limitations of safety warning signs and fences in complex construction environments.

Description

technical field [0001] The invention relates to the field of construction safety protection, in particular to a device and method for construction machine positioning and safety area monitoring. Background technique [0002] Construction machinery or construction machinery such as cranes, tower cranes, excavators, forklifts, forklifts, road rollers, aerial work vehicles, and concrete pump trucks are widely used. In many construction sites, there are some areas that prohibit certain construction machines from entering the work, such as the ground that is prone to collapse and the ground above the underground pipe network; some places cannot be touched, such as live equipment, viaducts, etc.; some places are even far away To avoid, such as overhead power lines with a voltage of more than 10,000, there is induction electricity around them, and a sufficient safe distance should be kept. The current approach is to set up warning signs or safety fences, but this traditional metho...

AI Technical Summary

Problems solved by technology

The current approach is to set up warning signs or safety fences, but this traditional method has major limitations:

For example, when constructing under overhead power lines, the boom of the crane is in danger of being touched. The ground fence can restrict the body of the crane, but it cannot limit the lifting and rotation range of the boom. Even if warning signs can be hung at high altitudes, it is difficult to ensure safety. Because the crane operator has to pay close attention to the suspended object and the position of the ground, it is difficult to take into account whether the top of the boom touches the wire;

[0005] 3) Different construction machinery and equipment have different restrictions. Setting warning signs or fences will affect the convenience of construction, and it is difficult to ensure safety without affecting construction efficiency.

For example, some construction sites cannot pass heavy equipment on the ground. If fences are used for protection, although it is safe, it will make it inconvenient for small vehicles and personnel that can pass through, and affect construction efficiency;

[0006] 4) The construction site is relatively chaotic, with mixed operations of various equipment and personnel. Construction machinery operators work in harsh environments for a long time, and it is difficult to keep a clear mind. In addition, people and equipment are blocked, and sometimes they are negligent or cannot see warning signs. As a result, accidents were caused, resulting in heavy losses of personnel and property. There are many such examples, such as cranes touching wires, excavators digging underground pipes, aerial work vehicle personnel touching wires, etc.

[0007] In short, the current method of using warning signs or fences on construction sites has its limitations. For complex construction sites, it is necessary to use new technological means

[0008] To confirm whether the construction machinery is in the safe area, it must first be positioned. At present, the widely used positioning method is satellite positioning, such as GPS, Beidou positioning, etc., but the accuracy of civilian satellite positioning cannot reach below 10 meters. It is reported that the latest The accuracy of satellite positioning has been greatly improved, but there is no large-scale commercial application at present, and the accuracy of satellite positioning is affected by signals and the environment, with a large range of fluctuations and easy to be interfered. Its theoretical accuracy value is only ideal in open ground. If it is blocked by trees, tall buildings or viaducts, it often cannot work normally. In addition, it needs to search for satellites, and the response is slow during motion. Obviously, it cannot provide reliable safety warnings, and other solutions must be found.

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