Nghiên cứu, chế tạo và thử nghiệm thiết bị đo mực nước tự động không tiếp xúc bằng công nghệ radar

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Tác giả: Minh Hải Nguyễn, Quang Ngọc Trần, Văn Tuấn Trần, Ngọc Linh Vũ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khí tượng Thủy văn, 2022

Mô tả vật lý: tr.52-60

Bộ sưu tập: Metadata

ID: 335607

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Currently, automatic measuring devices on the hydrometeorological monitoring network of Vietnam almost completely depend on imported equipment, research, manufacture, and progress to mastering the technology of automatic measurement equipment production. hydrometeorology is essential. This paper presents the results of research, manufacture and testing of automatic water level measuring device according to the principle of non-contact measurement by radar technology. Based on theoretical research on the operating principle of water level radar, FFT (Fast Fourier Transform) spectrum analysis algorithm and Peak detection algorithm, combined with design and fabrication activities. In order to create electronics, the research has successfully built a water level radar (type FMCW radar). Water level radar using 60GHz frequency wave can measure water level from 0.5 to 40 m, resolution 0.001 m, accuracy of device after testing is ±0.003 m. This equipment has been tested and certified by the Center for hydrometeorological observation and has met the metrological requirements.Hiện nay, các thiết bị đo tự động trên mạng lưới quan trắc khí tượng thủy văn hầu như phụ thuộc hoàn toàn vào thiết bị ngoại nhập, việc nghiên cứu, chế tạo, tiến tới làm chủ công nghệ sản xuất thiết bị đo tự động khí tượng thủy văn là rất cần thiết. Bài báo này trình bày kết quả nghiên cứu, chế tạo và thử nghiệm thiết bị đo mực nước tự động theo nguyên lý đo không tiếp xúc bằng công nghệ radar. Dựa trên nghiên cứu lý thuyết về nguyên lý hoạt động của radar đo mực nước, thuật toán phân tích phổ FFT (Fast Fourier Transform) và thuật toán tìm đỉnh chính xác (Peak detection), kết hợp với các hoạt động thiết kế, chế tạo điện tử, nghiên cứu đã sản xuất thành công thiết bị đo mực nước không tiếp xúc theo nguyên lý radar sử dụng sóng điều tần liên tục (Frequency Modulated Continuous Wave). Thiết bị đo sử dụng sóng tần số 60GHz có thể đo mực nước từ 0,5 đến 40 m, độ phân giải cho phép đo được tới 0,001 m, độ chính xác của thiết bị sau quá trình thử nghiệm là ±0,003 m. Thiết bị đã được Trung tâm Quan trắc khí tượng thủy văn kiểm định và cấp giấy chứng định đạt yêu cầu kỹ thuật đo lường.

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