US 12,329,995 B2
Method for preventing fall of operator, controller, safety belt and storage medium
Ke Wang, Kunming (CN); Enxin Xiang, Kunming (CN); Jing Peng, Kunming (CN); Hao Yang, Kunming (CN); Xianping Zhao, Kunming (CN); Xiangyu Tan, Kunming (CN); and Mingxian Liu, Kunming (CN)
Filed by Yunnan Power Grid Co., Ltd. Electric Power Research Institute, Kunming (CN)
Filed on Jun. 10, 2024, as Appl. No. 18/738,915.
Application 18/738,915 is a continuation of application No. PCT/CN2023/107649, filed on Jul. 17, 2023.
Claims priority of application No. 202211011333.5 (CN), filed on Aug. 23, 2022.
Prior Publication US 2024/0325798 A1, Oct. 3, 2024
Int. Cl. A62B 35/00 (2006.01); G01R 33/00 (2006.01); G08B 21/02 (2006.01); G08B 21/04 (2006.01)
CPC A62B 35/0025 (2013.01) [A62B 35/0018 (2013.01); G01R 33/0023 (2013.01); G08B 21/02 (2013.01); A62B 35/0006 (2013.01); A62B 35/0056 (2013.01); G08B 21/0446 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for preventing a fall of an operator, applied to a safety belt, wherein the safety belt comprises a safety belt body and a magnetic field sensing device, wherein the safety belt body comprises a waist belt, a waist D-ring, a surrounding-rod belt and a safety rope, wherein the surrounding-rod belt comprises a surrounding-rod belt hook and a surrounding-rod belt body, and the safety rope comprises a safety rope hook and a safety rope body;
the safety belt body comprises a power supply and a wire, and when the surrounding-rod belt body, the surrounding-rod belt hook and the safety rope hook are powered by the power supply, the surrounding-rod belt body, the surrounding-rod belt hook and the safety rope hook form a closed circuit through the wire;
surfaces of the waist belt, the waist D-ring, the surrounding-rod belt and the safety rope, and surfaces of surrounding-rod belt hook and the surrounding-rod belt body, and surfaces of the safety rope hook and the safety rope body all are coated with magnetically conductive materials;
when the surrounding-rod belt body passes through the surrounding-rod belt hook, and the safety rope body passes through the safety rope hook, the surrounding-rod belt body, the surrounding-rod belt hook and the safety rope hook, the safety rope body form a closed magnetic loop through the magnetically conductive material; the closed loop and the closed magnetic loop form an alternating magnetic field sensed by the magnetic field sensing device;
wherein the method comprises:
obtaining, by the magnetic field sensing device, magnetic field information of the safety belt body worn by the operator;
querying a preset fixed state mapping table based on the magnetic field information of the safety belt body to obtain a fixed state of the safety belt, wherein the preset fixed state mapping table is configured to save a mapping relationship between the magnetic field information of the safety belt and the fixed state; and
outputting a warning signal based the fixed state;
wherein the magnetic field information of the safety belt body comprises a first surrounding-rod ring magnetic field information, a second surrounding-rod ring magnetic field information, a first surrounding-rod belt hook magnetic field information, a second surrounding-rod belt hook magnetic field information, a third surrounding-rod belt hook magnetic field information, a fourth surrounding-rod belt hook magnetic field information, a first safety rope hook magnetic field information, a second safety rope hook magnetic field information, a third safety rope hook magnetic field information, and a fourth safety rope hook magnetic field information;
the first surrounding-rod ring magnetic field information is magnetic field information when the surrounding-rod belt body is not wrapped around a fixture; the second the surrounding-rod ring magnetic field information is magnetic field information when the surrounding-rod belt body is wrapped around the fixture;
the first surrounding-rod belt hook magnetic field information is magnetic field information when the surrounding-rod belt hook is in an empty ring state; the second surrounding-rod belt hook magnetic field information is magnetic field information when the surrounding-rod belt hook is buckled to the waist D-ring; the third surrounding-rod belt hook magnetic field information is magnetic field information when the surrounding-rod belt hook is buckled to the surrounding-rod belt body; the fourth surrounding-rod belt hook magnetic field information is magnetic field information when the surrounding-rod belt hook is suspended by the fixture; and
the first safety rope hook magnetic field information is magnetic field information when the safety rope hook is in the empty ring state; the second safety rope hook magnetic field information is magnetic field information when the safety rope hook is buckled to the waist D-ring; the third safety rope hook magnetic field information is magnetic field information when the safety rope hook is buckled to the safety rope body; and the fourth safety rope hook magnetic field information is magnetic field information when the safety rope hook is suspended by the fixture.