INDIRECT MEASUREMENT METHODOLOGY OF CARGO WEIGHT LIFTED BY THE EXCAVATOR IN THE CRANE MODE

Introduction. To solve the indirect measurement problem of the cargo weight lifted by the excavator in crane mode the authors propose the specific method and develop mathematical model according to the indications of hydraulic fluid pressure sensors in the piston and rod cavities of boom lifting cylinders. Moreover, the signals from the angle sensor of the boom and the handle relative to the gravity horizon are used, the roll and pitch sensors of the rotary column of the excavator relative to the gravity horizon are additionally applied.

Materials and methods. As initial data of the indirect measurement method of cargo mass, constant design parameters, constant masses of moving links are used, such as booms with handle hydraulic cylinder, handles with bucket hydraulic cylinder and bucket turning mechanism, bucket weight. In addition, constant linear number and angular machine dimensions are included in the investigation. To obtain analytical formulas of the method, the method of homogeneous coordinates is applied, as well as the method of direct analytical inference.

Results. The developed design scheme of the method is presented. As a result, the position of the excavator crane is described in the right-hand rectangular coordinate system. Moreover, the technique of indirect measurement of cargo mass according to the indications of hydraulic fluid pressure sensors in the form of formulae linear sequence is presented.

Discussion and conclusion. The accuracy of the developed method was estimated by comparison with the results of the full-scale experiment. The relative reduced measurement error in the range of boom angles’ measurement and the crane-excavator handle was less than ten percent. Therefore, the technique merits are its simplicity, as well as record of the roll and pitch angles of the crane-excavator turntable element.

1. Trenogin E.O., Vahrushev S.I. Patent research of possible designs of working equipment of a single bucket excavator. Sovremennye tehnologii v stroitel’stve. Teorija i praktika, 2016, vol. 2, pp. 303–311.

2. Dubrovin L.M., Nikishechkin A.P., Davydenko V.I. Cargo control on hoisting-and-transport machines. Mir transporta, 2016, vol. 14, no. 3 (64), pp. 98–105.

3. Nikishechkin A.P., Dubrovin L.M., Davydenko V.I. A method for estimating the weight of a load of hoisting-and-transport devices using the parameters of the magnetic field produced by a direct current motor. Vestnik MGTU «Stankin»,  2016, no. 1,  pp. 64–67.

4. Nikishechkin A.P., Dubrovin L.M., Davydenko V.I. Direct current motor as a source of diagnostic information. Pribory i sistemy. Upravlenie, kontrol’, diagnostika, 2016, no. 7, pp. 53–58.

5. Zhirov V.G. Measuring system for weighing metal waste. Datchiki i sistemy, 2014, no. 12, pp. 66–67.

6. Jakuta I.V., Ermakov S.V. Estimation of the divergence of the masses of the received and delivered cargo in determining the mass by precipitation (the method of draft survey). Vestnik Murmanskogo gosudarstvennogo tehnicheskogo universiteta, 2016, vol. 19, no. 4, pp. 822–829.

7. Ivanov V.A.. Makagon N.S., Maslenko V.O. Experimental sample of airborne cargo weighing system [Electronic resource]. Uchenye zametki TOGU, 2017, vol. 8, no. 4, pp. 1–9. Access mode : http://pnu.edu.ru/media/ejournal/articles-2017/TGU_8_259.pdf, free (date of the application : 26.04.2018).

8. Ivanov V.A., Maslenko V.O., Harchenko K.A. Experimental device for hydraulic weighing of cargo [Electronic resource]. Uchenye zametki TOGU, 2017. vol. 8, no. 1, pp. 128–137. – Access mode : http://pnu.edu.ru/media/ejournal/articles-2017/TGU_8_25.pdf, free (date of the application : 26.04.2018).

9. Bol’shunova O.M., Korzhev A.A., Kamysh’jan A.M. Modernization of the on-board system of a quarry dump truck. Innovacii i perspektivy razvitija gornogo mashinostroenija i jelektromehaniki: IPDME-2017 : Sbornik nauchnyh trudov mezhdunarodnoj nauchno-tehnicheskoj konferencii. SPb : SPGU, 2017, pp. 110–114.

10. Gawlik A., Kucybała, P. Dynamic weighing system used in excavator. Journal of KONES Powertrain and Transport, vol. 24, no. 4, 2017, pp. 31–38.

11. Kalairassan G., Boopathi M., Mohan R. M. Analysis of load monitoring system in hydraulic mobile cranes. IOP Conference Series : Materials Science and Engineering, vol. 263, no. 6, 2017, pp. 062045. DOI: 10.1088/1757899X/263/6/062045

12. Krastanov, K. About the safety by using of mobile cranes. The Eurasia proceedings of science, technology, engineering and mathematics, 2017, vol. 1, pp. 213–217. http://dergipark.gov.tr/download/article-file/38004

13. Walawalkar A., Heep S., Schindler C., Leifeld R., Frank M. Validation of an analytical method for payload estimation in excavators. In: Berns K. et al. (eds) Commercial Vehicle Technology 2018. Proceedings. Springer Vieweg, Wiesbaden, pp. 3–16. DOI: https://doi.org/10.1007/978-3-65821300-8_1

14. Koch S., Reichhartinger M. Observer-based sliding mode control of hydraulic cylinders in the presence of unknown load forces. Elektrotechnik & Informationstechnik (2016) 133/6: 253–260. DOI: https://doi.org/10.1007/s00502-016-0418-6