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Flat membrane with a hard heart design of the sensor element

6604602600198I96I94I93672042032022cH] I996772102092082 (I72066972132I22II Third, the results can be obtained by calculating the displacement of each node and the stress and strain values calculated from the known, the entire sensor to withstand normal stress dT,, d, and shear stress, except near the loading area, the main components to withstand stress d. The maximum weight of 49 occurred in the element (see Figure 2), the point is under stress. Figure 3 shows the distribution of the lower surface of flat film can be seen approximately symmetrical, linear distribution, the neutral axis does not coincide with the geometrical symmetry axis, and the maximum positive and negative stress values are not equal, the maximum being near the loading surface stress values are relatively large strain gage location is ideal for large strain, and good symmetry, and should try to avoid stress concentration point. According to the results of FEM (see Figure 3) J4 is the ideal surface, which posted one-sided, H - 8mm, d for the optimal design of a 25ram. Figure 4 shows a 25ram, H d along a 8ram design The distribution of the stickers affixed to one-sided one-sided AA,, the main stress,[link widoczny dla zalogowanych], Figure 5 shows that the design ? r (ie E_J AA along the one-sided distribution of stickers can be seen also approximately symmetrical, linear distribution, the tangential stress effect, in which the neutral axis of the shaft closer than the loading surface, and similarly, the maximum being near the loading surface strain is too large. It should be noted that the patch near the corner points should be avoided because these areas easy stress concentration on the accuracy of measurement will have some impact. z a = head through the Chicago store a quantity of calculation can also get baskets lute position of the neutral surface of the sensor geometry and the relationship between the change in film thickness does not influence the H the location of neutral plane, while the diameter of the hard heart of diameter d and the ratio D d / D measurement technology 1996Ng_2 position of the neutral surface greater impact. the ratio of the smaller, more neutral surface S. near the loading surface. d Conclusion l / l ///// i/1-1. In addition to loading area sensor, the main components to withstand the stress of 2. flat film surface of AA under the posted one-sided ideal. stress and strain components and the approximate linear , symmetrical distribution. 3. neutral surface position and loading surface and the outer diameter ratio of d / R is related to the ratio of the smaller, closer to the neutral surface loading surface. d, hard-core diameter d of a 25ram. Ping film thickness, \Army. sensor technology .1988 (26 ~ 29 to the engineering measurement. which linearity ≤ 1.0F ・: 2 the Comment, Yu Yong, cabinet,[link widoczny dla zalogowanych], etc. - He of the original Institute of Technology 1981 (3): 61 ~ 7 smart Electronic weighing system Cen Chunbo a rH7, f measured in Hainan Province Yu l] City 5702o6) Abstract This paper introduces the intelligent use of electronic weighing system as the main controller, microcontroller,[link widoczny dla zalogowanych], programmable chip display extension, dial code, exchange of rabbit late Keywords MCU interface intelligent weighing plow. Heung stare fLJ an overview of the current in all areas of SCM is widely used in measuring and testing system,[link widoczny dla zalogowanych], the microcontroller uses can significantly improve and enhance the static and dynamic measurement accuracy. This described by single 8039 core, composed of smart electronic weighing systems for sugar mills, docks, mines, warehouse trucks, cargo weighing. computing, printing, display and control. Second, the system is the principle of the control system an order by the single chip, the green light to wait for vehicles entering the weighbridge, when the vehicle entered,[link widoczny dla zalogowanych], the red light behind the vehicle until such instructions and the \microcontroller input port, the card's signal input, the system for sampling and testing A / D signal, the analog input into a single chip for digital data processing, printing out the date, time, vehicle type, number, weight, and then MCU command The car left the weighbridge. and bright green, this repeated cycle of work periodically. Third, the system's overall program and the hardware implementation of the control system with 8039 as the microprocessor, the input voltage signal from the four semi-A / D conversion device 4501B converted to five BCD. UO port 8243 by the expander input 8039, dial code input and display using programmable I / O interface chip 8279 to achieve. output using 8243 for 1 /) Expansion of the bus with the printer cP8o phase connection, the use of optical isolation devices and drive devices ll7 MC1416, was to control _ ___ Blue xxxxx:; 55; 2

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