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System and method for determination of position

InactiveUS20090149202A1low costreduce requirement
A system and method of determining and reporting on the position of a wireless device relative to a group of other wireless devices dispersed within a specified geographic area. The system includes at least one Query Unit, three or more Responding Units disposed at determinable locations within the specified geographic area, and one or more Mobile Units, which may correspond to additional Responding Units or units that function only as receivers. The Query Unit sequentially queries the Responding Units, and, responsive to the respective query messages, the Responding Units transmit corresponding response messages. One or more of the Mobile Units receive the query and response messages, and generate, for each query-response message pair, a set of time-difference-of-arrival (TDOA) measurements, which are used by the Mobile Units to determine their positions relative to the Responding Units. The Mobile Units record the times-of-arrival (TOAs) of the query message and the response messages at their respective receivers, and calculate the TDOAs based on the recorded TOAs. The TDOAs are then analyzed to determine the time differences due to the differences in lengths of the respective message propagation paths. The position of each Mobile Unit can then be computed using computation techniques typically employed in Long Range Navigation (LORAN) receivers, or any other suitable computation technique.
Owner:STEELE CHRISTIAN

Electronic scale

InactiveCN104838243Aavoid damagelow cost
An electronic scale includes a loading plate (1), a first precision weighing assembly (2) for supporting the loading plate (1), a second precision weighing assembly (3) for supporting the loading plate (1) and the first precision weighing assembly (2), and a force-guiding member (4) for transmitting itself pressure to the second precision weighing assembly (2). The first precision weighing assembly (2) includes an elastic support member (21). A force-guiding support part (40) is arranged on the force-guiding member (4). A force-guiding pressure welding part (10) is arranged on the loading plate (1). When there is no object on the loading plate (1), the force-guiding pressure welding part of the loading plate (1) is higher than the force-guiding support part (40) of the force-guiding member (4). When there are some objects on the loading plate (1), the loading plate (1) is stressed to press the elastic support member (21) to move down. After the loading plate (1) is stressed to a certain degree, the force-guiding pressure welding part (10) presses the force-guiding support part (40) of the force-guiding member (4). When the weight of the loaded objects exceeds the metre full scale of a kitchen electronic scale, the inventive electronic scale effectively prevents damage to the kitchen electronic scale besides the electronic scale is used as a weight electronic scale and the kitchen electronic scale at the same time.
Owner:SUZHOU VOCATIONAL UNIV

Capacitive flexible pressure sensor based on microstructural dielectric layers and preparation method of capacitive flexible pressure sensor

ActiveCN105865667Alow costImprove efficiency
The invention relates to a capacitive flexible pressure sensor based on microstructural dielectric layers and a preparation method of the capacitive flexible pressure sensor and belongs to the technical field of sensors. The capacitive flexible pressure sensor comprises an upper flexible substrate, a lower flexible substrate, an upper conducting layer and a lower conducting layer, wherein the upper conducting layer is attached to the inner surface of the upper flexible substrate, the lower conducting layer is attached to the inner surface of the lower flexible substrate, and the microstructural dielectric layers are arranged between the upper conducting layer and the lower conducting layer. Compared with the prior art, different microstructural dielectric layers are designed for the capacitive flexible pressure sensor, the sensor performance can be effectively regulated according to change of conditions such as shape, size, distribution and the like of each dielectric layer microstructure, and preparation of the capacitive flexible pressure sensors with different sensitivity and test ranges is realized. Besides, the microstructures prepared with methods such as microcapsule foaming, impressing, replica transfer, 3D printing and the like are low in cost, high in efficiency, low in energy consumption and particularly suitable for large-area and large-scale production, and application and popularization of the sensor are facilitated.
Owner:XIAMEN ZHONGKE WISDOW MEDICAL TECH CO LTD
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