Combined double-anchor-point positioning method based on ultra-wideband distance measurement
A positioning method and ultra-wideband technology, applied in positioning, measurement devices, radio wave measurement systems, etc., can solve problems such as limiting anchor point positioning distance, energy dispersion, and positioning accuracy degradation, to reduce system costs, improve positioning accuracy, The effect of high reference value and economic benefits
Pending Publication Date: 2021-12-14
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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Problems solved by technology
In this positioning mode, the near-omnidirectional radiation of the anchor point antenna will reduce the positioning accuracy due to multipath and interference factors in a narrow space. At the same time, the omnidirectional radiation will cause energy to be scattered in space, and the communication distance will be extremely large In addition, in order to achieve reliable positioning, the tag needs to communicate with two adjacent anchor points at the same time, which inevitably requires that the communication ranges of the two adjacent anchor points should be fully overlapped, thereby limiting the positioning distance of the anchor points; especially When performing long-distance indoor positioning, the number of anchor points will inevitably increase, which will bring a lot of cost consumption and redundant waste in engineering
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[0033] The present invention proposes a combined dual-anchor positioning method based on ultra-wideband ranging. The structure of the combined dual-anchor positioning base station is as follows: figure 2 shown, including the following steps:
[0034] S1: Build a combined dual-anchor positioning base station, including a dual-anchor base station and an ultra-wideband booster antenna; the two ultra-wideband booster antennas are respectively connected to the two anchor points of the dual-anchor base station through coaxial cables, and the main lobe The directions point to the two ray directions of the antenna connection line respectively, and the limited range of the opposite direction of the main lobe direction of the two overlaps; among them, ideally, the combined base station is required to have absolute electromagnetic shielding, so as to avoid the internal anchor point of the base station and the tag Communication is established directly. The single combined double-anchor ...
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The invention provides a combined double-anchor-point positioning method based on ultra-wideband distance measurement, which comprises the following steps of: constructing a combined double-anchor-point positioning base station which comprises a double-anchor-point base station and an ultra-wideband gain antenna; carrying out bilateral bidirectional distance measurement on tags to be positioned every fixed time by combining a double-anchor positioning base station, if the distance information of two tags to be positioned is obtained, determining that the tags are in the overlapping range of two ultra-wideband gain antennas, and determining the positions of the tags according to the distance of the two ultra-wideband gain antennas and the single distance information; and if the distance information of one to-be-positioned tag is obtained, determining that the tags are located in the main lobe direction of the ultra-wideband gain antenna, and determining the tag position according to the distance information. According to the combined double-anchor-point positioning method based on ultra-wideband distance measurement, the problem of single-base-station one-dimensional positioning and the problem of multi-base-station extended positioning are effectively solved through innovative combined base station construction design and by utilizing the spatial position relation of combined double anchor points and a fusion data processing method.
Description
technical field [0001] The invention relates to the technical field of ultra-wideband positioning, in particular to a combined double-anchor positioning method based on ultra-wideband ranging. Background technique [0002] UWB (Ultra Wide-Band, UWB) is a new type of wireless communication technology, which was first used in the military and gradually transferred to civilian use in recent years, especially in the field of high-precision indoor positioning. Ultra-wideband has low power consumption, insensitive to channel fading (such as multipath, non-line-of-sight channels), strong anti-interference ability, will not interfere with other devices in the same environment, and has strong penetration (can be transmitted through Positioning through the environment of a brick wall), in the line of sight (LOS) environment, it can theoretically obtain better than centimeter-level ranging and positioning accuracy, which is very suitable for high-precision indoor positioning. [0003]...
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IPC IPC(8): G01S5/02
CPCG01S5/02
Inventor 徐宏杨学冬张勇高卿粟
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY