1. Tacheometers. URL:http://www.nngasu.ru/geodesy/classification/chastnye-klassifikatsii/17_Taxeometri. php (in Rus-sian).
2. Measuring the volume of bulk materials. URL: http://www.ngce.ru/izmerenie_obemov_sypuchih _materialov.html (in Russian).
3. Terrestrial laser scanning. URL: http://trime-tari.com/ru/stati/nazemnoe-3d-lazernoe-skanirovanie (in Russian).
4. Seredovich V.A., Komissarov A.V., Komissarov D.V., Shi-rokova T.A. Ground laser scanning. Novosibirsk: SGGA. 2009. 261 p. (in Russian).
5. Bulk material level sensor. URL: http://rusautomation.ru/datchiki_urovnya/datchiki-urovnya-sipuchih-materialov (in Russian).
6. Kapustin A.A., Yatsevich G.B., Naumov A.P., Razumov-sky V.N., Severov L.A., Ermolaeva M.Yu. Patent RU N 1840747. 2009. (in Russian).
7. Types of laser scanners. URL: http://www.ngce.ru/pg_publications11.html (in Russian).
8. Frolov A. Projection laser grid. URL: http://www.qwrt.ru/news/112 (in Russian).
9. Projecting a laser grid. URL: http://www.qwrt.ru/news/112 (in Russian).
10. Zemlyansky V.N., Zager I.Yu., Yashinkina A.A. Engineering geology. Determination of the angle of repose of sandy soils: method. instructions. Ukhta: USTU. 2011. 6 p. (in Rus-sian).
11. Ultrasound. URL: solutions.ru/ultrasound/theory/ (in Russian).
12. Lebedev, A.E., Zaitsev A.I., Petrov A.A. Method for assessing the coefficient of heterogeneity of mixtures of free-flowing media. Engineering Bulletin of the Don. 2014. N 3. URL: http: ivdon.ru/ru/ magazine/archive/n3y2014/2556.19 (in Russian).
13. Lebedev A.E., Vatagin A.A. Express method for assessing the volume of loose materials. Automotive Industry. 2019. N 12. P. 27-29. (in Russian).
14. Mitsenko I.V., Yuzhik I.B., Ilinykh S.P. Patent RU N 2288449. 2006. (in Russian).



