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An indoor positioning method and device

An indoor positioning and phase technology, applied in positioning, measuring devices, instruments, etc., can solve the problems of large range change and low positioning accuracy.

Active Publication Date: 2019-06-18
深圳市西博泰科电子有限公司
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Problems solved by technology

[0002] At present, the indoor positioning method is more common based on radio frequency identification positioning method, which includes RFID, wifi, Bluetooth and other positioning methods, mainly based on the received signal strength to calculate the distance between the receiver and the transmitter to achieve indoor positioning, but due to the The influence of the multipath effect of the environment often changes greatly in ranging, which makes the positioning accuracy low. The positioning error of these methods is often 60cmˉ120cm

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Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention, and the technical features described below can be combined with each other as long as they are not contradictory.

[0047] figure 1 It is a schematic flowchart of the indoor positioning method in the first preferred embodiment of the present invention, figure 2 It is a block diagram of the indoor positioning device in the second preferred embodiment of the present invention, such as figure 1 with figure 2 As shown, the indoor positioning device implementing the present invention includes a transmitting antenna TX 1 , receiving antenna RX 1 , RX 2 , RX 3 , RX 4 , a homodyne receiver, a heuris...

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Abstract

The invention discloses an indoor positioning method and device. An optimum frequency sequence is transmitted by a transmitting antenna so that a homodyne receiver can perform phase detection according to an obtained second harmonic signal and the received optimum frequency sequence to obtain a phase of the second harmonic signal. According to the phase of the second harmonic signal and a period integer of the optimum frequency sequence, differential distances of each pair of receiving antennas relative to a passive electronic tag are acquired respectively. Finally, a spatial position of the passive electronic tag is determined by a nonlinear conjugate gradient algorithm. By the above method, the influence of a multipath effect of the environment can be reduced, and high-precision positioning is achieved. The three-dimensional positioning error in the indoor environment is 10 cm on average.

Description

【Technical field】 [0001] The invention relates to an indoor positioning method and device. 【Background technique】 [0002] At present, the indoor positioning method is more common based on radio frequency identification positioning method, which includes RFID, wifi, Bluetooth and other positioning methods, mainly based on the received signal strength to calculate the distance between the receiver and the transmitter to achieve indoor positioning, but due to the The influence of the multipath effect of the environment often changes greatly in ranging, which makes the positioning accuracy low. The positioning error of these methods is often 60cmˉ120cm. How to reduce the interference of the environment on indoor positioning has become an urgent problem to be solved in the Internet of Things industry. 【Content of invention】 [0003] The main purpose of the preferred embodiments of the present invention is to provide an indoor positioning method, which aims at reducing the inf...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/06
CPCG01S5/0273G01S5/06
Inventor 梅勃
Owner 深圳市西博泰科电子有限公司
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