Research on Leveling Accuracy Detection Device for Portable Elevator

According to the requirements of operation test in TSG T7001-2009, when the car runs up and down at normal speed with no load and full load respectively, the car leveling shall be good without abnormalities, that is, it shall meet the requirements of the accuracy of car leveling shall be within $\pm 10\mathbf{mm}$. The retention accuracy of car leveling shall be within $\pm 20\mathbf{mm}$. If the loading and unloading exceeds $\pm 20\mathbf{mm}$, it shall be corrected to within $\pm 10\mathbf{mm}$ in GBT 7588.1-2020. When measuring, the inspector usually uses a ruler to measure the vertical distance between the car sill and the landing door sill. It is necessary to squat on the ground and carefully observe the reading of the ruler. In places with insufficient light intensity, it is inconvenient and inaccurate to use flashlight and other lighting equipment. This paper designs a portable elevator leveling accuracy detection device, which can make the inspectors directly stand and read the leveling data without bending down. It can effectively improve the detection efficiency and reduce the labor intensity of detection.