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Array type displacement monitoring system

A displacement monitoring, array-type technology, applied in the direction of measuring devices, measuring acceleration, electromagnetic measuring devices, etc., can solve the problem of high cost

Active Publication Date: 2021-07-06
蔡德所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods also need to bury and install special operating pipelines for the monitoring system, resulting in higher overall equipment costs

Method used

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Examples

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Embodiment 1

[0042] like figure 1 , 4 In ~6 and 10, an array type displacement monitoring system includes a plurality of monitoring nodes 1, and the monitoring nodes 1 are connected by flexible connecting pipes 2, and an acceleration sensor 100 is arranged in the monitoring nodes 1, such as Figure 4 Among them, the acceleration sensor 100 is electrically connected to the acquisition device 105, and the acquisition device 105 is used to collect signals, and performs filtering and noise reduction processing on the collected electrical signals, and the acquisition device 105 is electrically connected to the computing device 106, and the computing device 106 is used to convert the electrical signals Converted into digital signals, the computing device 106 is electrically connected to the data sending device, and the data sending device uses 485 or CAN bus to send data. With this structure, the present invention is as Figure 14 The arrangement shown in the water conservancy project 9 includ...

Embodiment 2

[0044] On the basis of Example 1, the preferred scheme is as figure 2 Among them, a three-axis acceleration sensor 101 is provided in the monitoring section 1 for monitoring the displacement data of the x, y, and z axes. The three-axis acceleration sensor 101 adopts, for example, the ADXL3 series three-axis acceleration sensor, in which a mass block is provided, and the mass block is elastically supported in the orthogonal directions of the x, y, and z axes, and is equipped with a differential capacitance detection The circuit detects the displacement of the mass block, thereby calculating and obtaining the displacement data of the x, y, and z axes.

Embodiment 3

[0046]On the basis of Embodiment 1, in order to avoid the mutual influence among the x, y, and z axes in Embodiment 2, especially the influence of the z axis on the monitoring accuracy of the x, y axes. For example, there is orthogonal interference in the integration of 3 axes, that is, when one of the axes has a large output, even if the other two axes do not actually change, due to the shared demodulation circuit and other issues, the two axes whose actual acceleration does not change will also produce interfere with the output, thereby affecting measurement accuracy. Furthermore, when the acceleration is close to 1g, or when the tilt measurement is in the range of 60-90°, due to the characteristic of the sinusoidal function: the closer the slope is to 90°, the smaller the slope of the curve, and the measurement accuracy will degrade rapidly, greatly affecting the measurement results.

[0047] A further preferred solution is as image 3 Among them, a one-axis acceleration s...

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Abstract

The invention provides an array type displacement monitoring system which comprises a plurality of monitoring sections. The monitoring sections are connected through flexible connecting pipes, acceleration sensors are arranged in the monitoring sections, the acceleration sensors are electrically connected with an acquisition device, the acquisition device is electrically connected with an arithmetic device, and the arithmetic device is electrically connected with a data sending device. The attitude of each monitoring section is monitored by adopting the acceleration sensor in the array, and the deformation of the monitored object is obtained by joint calculation of the plurality of monitoring sections. By reducing the requirement for the precision of the sensor and adopting a five-axis scheme, the problem that a three-axis sensor is low in measurement precision is solved, although two-axis accelerometers are additionally arranged, the precision requirement for the accelerometers is reduced under the condition that the same precision requirement is met, and the cost of a monitoring system is greatly reduced actually.

Description

technical field [0001] The invention relates to the field of monitoring systems for geotechnical engineering, dam engineering, geological engineering, etc., in particular to an array displacement monitoring system. Background technique [0002] The displacement monitoring system is a system used for geotechnical engineering, dam engineering, and geological engineering monitoring. It uses built-in acceleration sensors to monitor the deformation of slopes or large structural objects, and is used to prevent geological disasters and ensure that the deformation of large structural objects is within the permitted range. In the existing new technology, the rotation angle change from the gyroscope is usually used to measure the deformation. For example, the method and device for monitoring the deflection of the dam face plate or the internal deformation of the dam body are described in the Chinese patent document CN1558181A. However, this solution has higher requirements on the ac...

Claims

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Application Information

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IPC IPC(8): G01B21/32G01B7/16G01P15/18G01P15/125
CPCG01B21/32G01B7/22G01P15/18G01P15/125
Inventor 蔡德所郑天翱陈声震
Owner 蔡德所
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