A novel sensitive piezoelectric mass balance used for weightless environment
- PDF / 4,290,788 Bytes
- 10 Pages / 595.276 x 793.701 pts Page_size
- 42 Downloads / 157 Views
novel sensitive piezoelectric mass balance used for weightless environment *
*
ZHANG ShiJing, LIU YingXiang , DENG Jie & LIU JunKao School of Mechatronics and Engineering, Harbin Institute of Technology, Harbin 150001, China Received May 26, 2020; accepted July 20, 2020; published online September 24, 2020
A novel sensitive piezoelectric mass balance (PEMB) was developed for using in weightless environment. The mass of the measured object was obtained by detecting the resonant frequency shift of the PEMB. This weighing method was illustrated systematically. In order to build the relationship between the resonant frequency shift and the measured mass, the equivalent stiffness coefficient and the equivalent concentrated mass of the PEMB were analyzed theoretically. The influence of the structural and material parameters on the sensitivity was analyzed, which provided the design reference to improve the sensitivity. The finite-element-method (FEM) static analysis of the PEMB was carried out with ANSYS software to investigate its shock resistance. Furthermore, the vibration test and calibration experiment effectively verified the theoretical analyses results. The developed PEMB holds merits of independence on acceleration field, independence on properties of the measured object and with shock resistance. Consequently, it can be a suitable candidate for measuring mass of solid samples with unknown properties in the weightless environment. mass measurement, piezoelectric mass balance, resonant frequency shift, weightless environment Citation:
Zhang S J, Liu Y X, Deng J, et al. A novel sensitive piezoelectric mass balance used for weightless environment. Sci China Tech Sci, 2020, 63, https://doi.org/10.1007/s11431-020-1698-9
1 Introduction With rapid development of space exploration engineering, space sampling return has become an important research topic. The mass measurement of the collected sample has been a vital task in the space sampling fields [1–5]. Furthermore, lots of scientific experiments have been carried out in the space for decades. The mass measurement of the experimental sample in the space station or spacecraft has been also crucial. Therefore, the related weighing device that can be used to measure mass of samples in the weightless environment has been urgently required. Actually, some special conditions including independence on the acceleration field and the ability to withstand impact should be considered for *Corresponding authors (email: [email protected]; [email protected])
the weighing devices used in space weightless environment. Thus, it is necessary to develop the reliable weighing devices used for weightless environment. The measured solid samples of space experiments are usually with macro scale. Thus, the most direct idea is to migrate the widely used weighing devices on the earth into the space weightless environment. However, there will be some fatal problems. Generally speaking, the widely used weighing devices on the earth mainly include two types: force sensor based
Data Loading...
