Application of electronic inclination sensor in tower crane's monitoring

With the development of the construction industry, the mechanization degree of building construction increases year by year. Tower crane (tower crane for short), as a kind of machine that can realize vertical and horizontal material transportation, has been widely used in the construction industry, especially because of its high lifting height, large lifting weight and large working range. However, due to the large structure of tower crane and the high altitude operation, it is easy for tower crane to tip over. These accidents not only affect the construction progress, but also bring great loss of life and property to the country and people.

At present, tower crane installed with safety limit device, mainly including lifting weight limit device, lifting moment limit device, amplitude limit device, lifting height limit device, rotary limit device. The function of the safety device is to automatically cut off the power when the tower crane exceeds the set value in the operation process to prevent the occurrence of tower crane accidents. More importantly, the inspection of the hidden danger of tower crane is not in place. Although the safety limit device is installed on the tower crane, the existence of some hidden danger cannot be checked, which aggravates the dangerous factors in hoisting or specific circumstances, and finally causes the tower crane to tilt too much. Therefore, how to effectively detect the inclination Angle of the tower before and during use, and when the inclination Angle is larger than a certain critical state, timely alarm can effectively prevent the occurrence of tower crane tipping accident.

In tower crane anti - tilting monitoring instrument, the main part is inclination measuring device. The purpose of the tilt measuring device is to measure the tilt Angle of the tower in real time. Due to the small change of inclination Angle at the top of the tower, the sampling frequency of inclination measuring device should be within the range of 0.5-10hz, and the measuring accuracy should be higher than 0.05 degrees. At the same time, noise caused by tower top vibration should be filtered out to ensure reliable communication and accurate judgment.