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Assembly positioning system and method of large timber structure

A positioning system and positioning method technology, applied in transmission systems, signal transmission systems, radio wave measurement systems, etc., can solve problems such as inability to adapt to industrialization upgrades

Inactive Publication Date: 2018-10-09
TONGJI UNIV
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  • Claims
  • Application Information

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Problems solved by technology

As the traditional manual construction and assembly methods can no longer meet the needs of industrialization upgrading, the digital wood structure technology based on digital design and construction technology has become an important support for the upgrading of modern wood structure industry

Method used

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  • Assembly positioning system and method of large timber structure
  • Assembly positioning system and method of large timber structure
  • Assembly positioning system and method of large timber structure

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Embodiment Construction

[0052] The present invention will be further described below with reference to the drawings and specific embodiments.

[0053] The invention provides a large-scale wooden structure assembly positioning system and method, including a Zigbee wireless sensor network positioning system and an image projection positioning system.

[0054] Such as figure 1 As shown, the Zigbee wireless sensor network positioning system includes a wireless sensor network based on Zigbee technology, a Zigbee gateway, and an upper computer positioning display system.

[0055] The wireless sensor network based on Zigbee technology is used to transmit and receive radio frequency signals to obtain the RSSI value indicating the strength of the radio frequency signal; the RSSI value and other data are sent to the Zigbee gateway through the Zigbee protocol. The Zigbee gateway, used as a coordinator, is the medium for information transmission between each sensor node and the host computer; the Zigbee gateway commun...

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Abstract

The invention discloses an assembly positioning system and method of a large timber structure. The least squares support vector regression (LSSVR) algorithm is combined with the Zigbee sensor networktechnology to improve the positioning accuracy of a wireless sensor network node. A received signal strength indication (RSSI) value is collected for 10 times, significant fluctuation values are discarded, and an arithmetic mean value is taken as an input value of a distance calculation formula to increase the fault tolerance rate. An improved RSSI ranging algorithm is adopted, and the known nodesare added to N to obtain a corrected distance calculation formula so as to reduce the error of a shadowing signal propagation model. An image projection FFT algorithm is adopted, the projection algorithm converts two-bit data into one-dimensional calculation, thereby greatly shortening the time required for positioning, the image positioning algorithm greatly improves the positioning accuracy, and the accuracy can reach a millimeter level.

Description

Technical field [0001] The invention relates to the field of intelligent construction, in particular to an assembly positioning system and method for large-scale wooden structures. Background technique [0002] Modern wood structure, as a large-scale, high-strength, low-quality-strength ratio, and homogeneous material, has become increasingly popular around the world due to its outstanding advantages such as environmental protection, heat preservation, energy saving, and earthquake resistance. As traditional manual construction and assembly methods can no longer meet the needs of industrial upgrading, digital wood construction technology based on digital design and construction technology has become an important support for modern wood structure industry upgrading. The large-scale wooden structure assembly positioning method can quickly and real-time locate assembly measurement points, improve assembly efficiency, and has certain application value in the field of digital construc...

Claims

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Application Information

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IPC IPC(8): H04W4/02H04W64/00G08C17/02H04B17/318H04N5/232H04N9/31G06T7/00G01S11/06
CPCH04B17/318H04N9/31H04W4/02H04W64/00G06T7/0004G08C17/02G01S11/06H04W84/18H04N23/80
Inventor 何斌王菲王志鹏周艳敏沈润杰
Owner TONGJI UNIV
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