China Railway Construction Heavy Industry has obtained a patent related to construction trajectory control, utilizing radar to determine target point coordinates and guide equipment surveying for improved accuracy.

March 21 News: According to the State Intellectual Property Office, China Railway Construction Heavy Industry Group Co., Ltd. has applied for a patent titled “Construction Equipment Trajectory Control Method, Device, Apparatus, Medium, and Program Product,” with authorization announcement number CN119846620B, granted on March 17, 2026. The application publication number is CN119846620A, application number CN202510123058.3, published on March 17, 2026. The application was filed on January 24, 2025. Inventors include Liu Jun, Xiao Zhenghang, Yi Dayun, Wang Can, and Shuo Tao. The patent agency is Beijing Tongli Juncheng Intellectual Property Agency Co., Ltd., with patent agents Li Yang and Huang Jian. The classification code is G01S13/88.

Patent Abstract: This embodiment provides a construction equipment trajectory control method, device, apparatus, medium, and program product. It involves setting up radar devices in a long tunnel construction system, transmitting electromagnetic waves from the radar to the drilling equipment, obtaining multiple reflection times, filtering to find the target point corresponding to the minimum reflection time, and acquiring the transmission and reflection times between the electromagnetic signals and the target point. It calculates the distance between the radar device and the target point, determines the angle information based on the reflection distance, and establishes a coordinate model using the angle and distance data. The target point’s coordinates are set as the starting point, and the trajectory coordinates of the drilling equipment are calculated. This controls the exploration path of the drilling equipment and tunnel boring machine, improving the accuracy of the survey.

China Railway Construction Heavy Industry was established on November 23, 2006, and listed on the Shanghai Stock Exchange on June 22, 2021. Its registered and office address is in Changsha, Hunan Province. It is a leading domestic manufacturer of high-end underground engineering equipment, with core businesses including tunneling machines and related equipment, featuring prominent technological and full industry chain advantages.

The company belongs to the SW Industry classification of Machinery Equipment - Construction Machinery - Complete Construction Machinery. It is involved in concepts such as railway infrastructure, government holdings, and state-owned enterprise reform. Its main activities include designing, developing, manufacturing, selling, leasing, and servicing tunneling machinery, rail transit equipment, and specialized professional equipment.

In 2025, China Railway Construction Heavy Industry achieved revenue of 10.045 billion yuan, ranking second among industry peers, below the first-place Shantui Co., Ltd. with 14.62 billion yuan. The industry average and median are both 12.333 billion yuan. The main business revenue was 9.972 billion yuan, accounting for 99.27%, with other (supplementary) income of 72.84 million yuan, accounting for 0.73%. Net profit in 2025 was 1.483 billion yuan, ranking first in the industry, higher than the second-place Shantui’s 1.214 billion yuan, with the industry average and median at 1.349 billion yuan.

Recent patent applications by China Railway Construction Heavy Industry include:

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