A Stress Wave Sensor Positioning Device for Detecting Defects of Ancient Building Wooden Components
A positioning device, sensor technology, applied in the direction of measuring devices, material analysis using sound waves/ultrasonic waves/infrasonic waves, instruments, etc.
Active Publication Date: 2017-11-14
BEIJING UNIV OF TECH
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Problems solved by technology
The device itself is very convenient and suitable for use on site in ancient buildings. At the same time, it improves the accuracy of the longitudinal and lateral positioning of the stress wave sensor, effectively solves the problems of personnel support or component surface marking, and improves the accuracy of stress wave data collection.
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[0026] For the stress wave sensor positioning of wooden components in ancient buildings, the determination of the detection section, the perimeter of wooden components, and the positioning of stress wave sensors, the sensor positioning device can be fixed and measured according to different shapes, positions, and sizes of wooden components. Calculate the layout of the detection cross-section sensors. The following situations are common:
[0027] (1) Lay stress wave probes at the height of wooden columns of circular ancient buildings, and position the sensors as follows: Figure 7 shown.
[0028] (2) Lay the stress wave probe at the bottom of the wooden column of the circular ancient building, and position the sensor as follows Figure 8 shown.
[0029] (3) Lay out the stress wave probes on the architrave of the circular ancient building, and position the sensors in different orientations as follows: Figure 9 shown.
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A stress wave sensor positioning device for detecting defects in wooden components of ancient buildings. When detecting longitudinal wooden components, by rotating the detection section sensor positioning device, the vertical detection section height is obtained by using the self-weight of the pendant hammer. After determining the detection section, it is pulled Take the sensor distribution and positioning measuring ruler, and fix the distribution and positioning measuring ruler through the automatic buckle and Velcro to quickly determine the circumference of the component. According to the number of stress wave sensors, the location of each sensor can be quickly obtained. When the detection object is a horizontally long wooden component, the Velcro strip can be fixed at the end of the detection beam, square, etc., and bonded to the reverse side of the end of the detection section positioning measuring ruler, and the section positioning measuring ruler is pulled to the detection section position. After determining the detection section, pull out the sensor distribution positioning measuring ruler to quickly determine the sensor distribution position. It not only reduces the problems of traditional slippery rulers and unbalanced detection sections, but also reduces the work intensity of detection personnel and effectively improves detection efficiency.
Description
technical field [0001] The invention relates to the location of a stress wave sensor which is beneficial for detecting defects of wooden components of ancient buildings. The invention belongs to the technical field of wood internal defect detection and ancient building protection. Background technique [0002] The stress wave non-destructive testing method is a common method for internal defect detection of wooden components of ancient buildings. The principle is to select different numbers of sensors according to the shape and size of the object to be detected, and after determining that the height of the sensor device is in the same section, the sensors are distributed equidistantly on the object to be measured, and the sensors are tapped one by one to collect data on internal defects of wooden components . Stress waves are generated inside the measured object under vibration, and the propagation time of different paths in the internal section is calculated and reconstru...
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IPC IPC(8): G01N29/26
Inventor 戴俭常丽红钱威李鑫
Owner BEIJING UNIV OF TECH