CN214372397U - Array type displacement monitoring device and monitoring node - Google Patents

Array type displacement monitoring device and monitoring node Download PDF

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Publication number
CN214372397U
CN214372397U CN202120458174.8U CN202120458174U CN214372397U CN 214372397 U CN214372397 U CN 214372397U CN 202120458174 U CN202120458174 U CN 202120458174U CN 214372397 U CN214372397 U CN 214372397U
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monitoring
section
acceleration sensor
axis
acceleration sensors
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蔡德所
郑天翱
陈声震
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Abstract

The utility model provides an array type displacement monitoring device and a monitoring section, which comprises a plurality of monitoring sections, wherein the monitoring sections are connected through a flexible connecting pipe, an acceleration sensor is arranged in each monitoring section, the acceleration sensor is electrically connected with a collecting device, the collecting device is electrically connected with an arithmetic device, the arithmetic device is electrically connected with a data sending device, an axial acceleration sensor is arranged in each monitoring section, and the monitoring direction of the axial acceleration sensor is along the axial direction of the monitoring section; two-axis acceleration sensors are further arranged at the two ends of the monitoring section, and the monitoring directions of the two-axis acceleration sensors are along the cross section direction of the monitoring section. The attitude of the monitoring section is monitored by adopting the acceleration sensor of the array, and the deformation of the monitored object is obtained by jointly calculating the monitoring sections. By adopting the five-axis scheme, the precision requirement on the accelerometer is reduced under the condition of meeting the same precision requirement, and the cost of the monitoring system is actually greatly reduced.

Description

Array type displacement monitoring device and monitoring node
Technical Field
The utility model relates to a monitoring system fields such as geotechnical engineering, dam engineering, geological engineering, especially an array displacement monitoring devices and monitoring festival.
Background
The displacement monitoring system is used for monitoring geotechnical engineering, dam engineering and geological engineering, monitors the deformation of a side slope or a large member through a built-in acceleration sensor, and is used for preventing geological disasters and ensuring that the deformation of the large member is within an allowable range. In the prior art, the deformation is measured by usually adopting the change of the rotation angle from a gyroscope. For example, a method and an apparatus for monitoring the deflection of a face plate of a dam or the internal deformation of a dam body described in chinese patent document CN 1558181A. But the precision requirement of the gyroscope is higher and the equipment cost is higher. CN103727911A also describes an assembled deep displacement monitoring device and system based on MEMS array, which uses) tilt sensor array to obtain the monitoring result of deep displacement underground. The tilt sensor as described above is based on the monitoring of the rotation angle to obtain the displacement result, and has high requirements on the precision. These methods also require the installation of special service pipes for the monitoring system, resulting in still high overall equipment costs.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an array displacement monitoring devices and monitoring festival is provided, can be under the prerequisite of ensureing the monitoring precision, the equipment cost is greatly reduced.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: an array type displacement monitoring device comprises a plurality of monitoring sections, wherein the monitoring sections are connected through flexible connecting pipes, acceleration sensors are arranged in the monitoring sections and 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;
an axial acceleration sensor is arranged in the monitoring section, and the monitoring direction of the axial acceleration sensor is along the axial direction of the monitoring section;
two-axis acceleration sensors are further arranged at the two ends of the monitoring section, and the monitoring directions of the two-axis acceleration sensors are along the cross section direction of the monitoring section.
In an optimal scheme, the monitoring directions of the two biaxial acceleration sensors have a difference of 30-60 degrees on the circumference.
In the preferred scheme, the flexible connecting pipe is a stainless steel corrugated pipe, and two ends of the stainless steel corrugated pipe are fixedly connected with the monitoring section through threads;
in the preferred scheme, the flexible connecting pipe is a pressure-resistant rubber pipe, and a steel wire mesh framework is arranged in the pressure-resistant rubber pipe;
in a preferable scheme, spherical particles with the diameter within 1-12 mm are filled in the flexible connecting pipe.
In a preferred scheme, the data sending device is also electrically connected with a wireless transmission device, and the wireless transmission device is connected with a cloud server;
the cloud server is connected with the terminal through the interactive system.
A monitoring section is provided with an axial acceleration sensor, and the monitoring direction of the axial acceleration sensor is along the axial direction of the monitoring section;
two-axis acceleration sensors are further arranged at the two ends of the monitoring section, and the monitoring directions of the two-axis acceleration sensors are along the cross section direction of the monitoring section.
In an optimal scheme, the monitoring directions of the two biaxial acceleration sensors are different by 10-80 degrees on the circumference.
In an optimal scheme, the monitoring directions of the two biaxial acceleration sensors have a difference of 30-60 on the circumference.
In a preferred embodiment, the monitoring directions of the two biaxial acceleration sensors differ by 45 ° in the circumference.
The utility model provides an array displacement monitoring devices and monitoring festival monitors the gesture of monitoring festival through the acceleration sensor who adopts the array, solves through the combination to the multisection monitoring festival, obtains the deflection by the monitoring object. In the preferred scheme, the utility model discloses a reduce the demand to the sensor precision to and the error compensation in the preferred scheme, can be guaranteeing under the prerequisite of monitoring precision, reduce entire system's cost by a wide margin, also can reduce system's interference killing feature, factor such as magnetism and temperature are to the influence of system, improve system's stability. Preferably, a five-axis scheme is adopted, the problem of low measurement precision of a three-axis sensor is solved, although accelerometers with two axes are added, under the condition of meeting the same precision requirement, the precision requirement on the accelerometers is reduced, and actually, the cost of the monitoring system is greatly reduced.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is the structure schematic diagram of the single monitoring section of the present invention.
Fig. 3 is a schematic structural diagram of another preferred embodiment of the single monitoring section of the present invention.
Fig. 3-1 is a schematic cross-sectional view of fig. 3.
Fig. 4 is a schematic circuit diagram of the biaxial acceleration sensor of the present invention.
Fig. 5 is a schematic diagram of the main control circuit of the present invention.
Fig. 6 is a schematic circuit diagram of the data transmission device of the present invention.
Fig. 7 is a data transmission block diagram of the array type displacement monitoring device of the present invention.
Fig. 8 is the utility model discloses array displacement monitoring devices test chart in the experimentation.
Fig. 9 is the schematic diagram of the monitoring signal after noise reduction.
Fig. 10 is a three-dimensional attitude view of the monitoring device during actual use in a certain hydraulic engineering.
Fig. 11 is an X-Y projection view of the present invention in actual use in a certain hydraulic engineering.
Fig. 12 is an X-Z projection of the present invention in actual use in a hydraulic engineering project.
Fig. 13 is a Y-Z projection view of the present invention in actual use in a certain hydraulic engineering.
Fig. 14 is a schematic diagram of the arrangement of the present invention in a certain hydraulic engineering.
In the figure: monitoring festival 1, acceleration sensor 100, triaxial acceleration sensor 101, first two-axis acceleration sensor 102, second two-axis acceleration sensor 103, one-axis acceleration sensor 104, collection system 105, arithmetic device 106, first data transmission device 107, second data transmission device 108, flexible connecting pipe 2, cable 3, flexible monitoring device 4, wireless transmission device 5, cloud ware 6, interactive system 7, terminal 8, hydraulic engineering 9.
Detailed Description
Example 1:
as in fig. 1, 4 ~6, 10, an array displacement monitoring devices, including a plurality of monitoring festival 1, connect through flexible connecting pipe 2 between the monitoring festival 1, be equipped with acceleration sensor 100 in the monitoring festival 1, as in fig. 4, acceleration sensor 100 is connected with collection system 105 electricity, collection system 105 is used for the signal of gathering, and carry out filtering and noise reduction to the signal of telecommunication of gathering, collection system 105 is connected with arithmetic unit 106 electricity, arithmetic unit 106 is used for converting the signal of telecommunication into digital signal, arithmetic unit 106 is connected with data transmission device electricity, data transmission device adopts 485 or CAN bus to send data. From this structure, will the utility model discloses as shown in figure 14 sets up in hydraulic engineering 9, including vertical direction and along the rivers direction, wherein the array displacement monitoring devices of vertical direction is used for monitoring the vertical deformation of hydraulic engineering 9 or large-scale gate, and the array displacement monitoring devices along the rivers direction is used for monitoring the deformation that the differential settlement of hydraulic engineering 9 or large-scale gate leads to. The change in the attitude of the monitoring joint 1 is measured by the acceleration sensor 100, and the internal deformation of the hydraulic engineering 9 or landslide is obtained.
Example 2:
on the basis of the embodiment 1, a preferred scheme is as shown in fig. 2, a three-axis acceleration sensor 101 is arranged in the monitoring section 1 and used for monitoring x, y and z three-axis displacement data. The triaxial acceleration sensor 101 employs, for example, an ADXL3 series triaxial acceleration sensor, in which a mass is provided, the mass is elastically supported in the orthogonal directions of the x, y, and z axes, and a differential capacitance detection circuit is provided to detect the displacement of the mass, thereby calculating the displacement data of the x, y, and z axes.
Example 3:
on the basis of the embodiment 1, in order to avoid the mutual influence among the three axes of x, y and z in the embodiment 2, particularly the influence of the z axis on the monitoring precision of the x axis and the y axis. For example, when the integrated 3-axis has quadrature interference, that is, when one axis has a large output, even if the other two axes do not actually change, the two axes with unchanged actual acceleration will generate interference output due to problems such as sharing a demodulation circuit, thereby affecting the measurement accuracy. Further, acceleration near 1g, or tilt measurement in the 60-90 ° interval, due to the sinusoidal function characteristic: the slope of the curve is smaller when the curve is closer to 90 degrees, the measurement precision is rapidly degraded, and the measurement result is greatly influenced.
In a further preferred embodiment, as shown in fig. 3, an axial acceleration sensor 104, such as an acceleration sensor of the ADXL1 series, is disposed in the monitoring section 1, and the monitoring direction of the axial acceleration sensor 104 is along the axial direction of the monitoring section 1; because be equipped with flexible coupling pipe 2 between each monitoring festival 1, in the deformation process of whole array displacement monitoring devices, flexible coupling pipe 2 inevitable takes place tensile, shrink or buckling deformation moreover, consequently adopts an axle acceleration sensor 104 to obtain the displacement of monitoring festival 1 along the axial, and monitoring accuracy improves by a wide margin. Preferably, the axis of the one-axis acceleration sensor 104 is aligned with the axis of the monitoring section 1. In this example, the monitoring section 1 is a stainless steel circular tube. An axial acceleration sensor 104 is mounted in the monitoring section 1 through a radial support frame. The gap in the monitoring section 1 is filled with particles of nearly round shape, so as to provide support under the self-deformation premise, or to smooth the deformation of the pipe body of the monitoring section 1 as much as possible.
As shown in fig. 3, two biaxial acceleration sensors, for example, acceleration sensors of the ADXL2 series, are further provided at both ends of the monitoring section 1, and the monitoring directions of the two biaxial acceleration sensors are along the cross-sectional direction of the monitoring section 1. Because the monitoring section 1 is a rod-shaped rigid body, when the posture of the monitoring section 1 changes, the displacement of the two ends of the monitoring section is necessarily the largest, so that the two-axis acceleration sensor is arranged at the two ends of the monitoring section 1, a larger displacement can be monitored, the precision requirement on the acceleration sensor is reduced, and higher monitoring precision is realized at lower cost. The scheme enables the monitoring joint 1 to form a 5-axis acceleration sensor.
In a preferred scheme, the monitoring directions of the two biaxial acceleration sensors are different by 10-80 degrees on the circumference, further preferably 30-60 degrees, and further preferably 45 degrees. As shown in fig. 3-1, with this structure, the measured dead point positions are shifted from each other.
In the preferred scheme, during calibration, firstly, orthogonal calibration of one two-axis acceleration sensor and one-axis acceleration sensor 104 is performed, and then orthogonal calibration of the other two-axis acceleration sensor and one-axis acceleration sensor 104 is performed, so that the measurement axes in the system are orthogonal;
and (4) judging an acceleration threshold, namely determining which axis is selected as a measuring axis by taking 0.866 as a threshold, and switching another group of measuring axes to measure when the threshold is exceeded.
The preferable scheme is as shown in fig. 1, the flexible connecting pipe 2 is a stainless steel corrugated pipe, and two ends of the stainless steel corrugated pipe are fixedly connected with the monitoring node 1 through threads. In the preferred scheme, the flexible connecting pipe 2 is a pressure-resistant rubber pipe, and a steel wire mesh framework is arranged in the pressure-resistant rubber pipe. In the above scheme, preferably, the flexible connection pipe 2 is filled with particles of a nearly circular shape, so that the flexible connection pipe 2 is prevented from forming an acute angle at a bent part when being squeezed, and the cable 3 in the flexible connection pipe is prevented from being damaged. Spherical particles with the diameter within 1-12 mm are filled in the flexible connecting pipe 2. Preferably, small pebbles with the diameter of 5-6 mm are adopted.
Preferably, as shown in fig. 7, the data sending device is further electrically connected to a wireless transmission device 5, and the wireless transmission device 5 is connected to a cloud server 6; the wireless transmission device 5 in this example selects a device such as USR-G780v2 that supports mobile network communications.
The cloud server 6 is connected with the terminal 8 through the interactive system 7. The interactive system in this example employs a browser-based OA interactive system. Terminals include desktop and mobile terminals. With this configuration, data can be applied to the terminal.
In a preferred scheme, in the using process, the noise reduction processing is carried out on the monitoring signal, and the specific steps are as follows:
s1, signal decomposition: selecting a proper wavelet basis function according to the characteristics of an original signal, determining a decomposition order and wavelet coefficients of each layer after decomposition, and selecting a proper decomposition order to avoid incomplete signal noise reduction or transitional noise reduction;
s2, wavelet coefficient threshold value quantization: selecting a proper threshold function and a threshold criterion according to the obtained characteristics of the wavelet coefficients of each layer, and carrying out threshold quantization processing on the decomposed high-frequency noise signals;
s3, wavelet reconstruction and restoration: and performing wavelet reconstruction on the low-frequency approximate coefficient decomposed by the ith layer and the high-frequency detail coefficient subjected to threshold quantization processing, wherein the restored signal is the signal subjected to noise reduction.
In a preferred embodiment, the threshold criterion is one of an unbiased risk estimation criterion, a fixed threshold criterion, a minimum maximum threshold criterion, and a heuristic threshold criterion.
In a preferred scheme, the error mathematical model of the acceleration sensor is as follows:
wherein: a. thex、Ay、AzActual measurements for the axis of monitor node 1X, Y, Z; a isx、ay、azIs the true acceleration value; a. thex0、Ay0、Az0Is zero offset; sx、Sy、SzIs a scale factor; kiji, j ═ X, Y, Z; i is not equal to j is an installation error coefficient and corresponds to a misalignment angle between a sensitive axis of the accelerometer and the orthogonal direction; kiiAnd i is X, and Y and Z are second-order nonlinear coefficients.
Taking the three-axis acceleration sensor 101 as an example, the one-dimensional output model of the signal containing noise can be expressed as:
S(x)=A(x)+λe(x)
wherein: (x) is an actual measurement signal of the triaxial acceleration sensor; a (x) is the true measurement signal; λ is the standard deviation of the noise signal; e (x) is the noise signal during the actual measurement.
Generally speaking, the noise signal e (x) is generally present in high frequency signals, and the true useful signal a (x) is generally present in low frequency signals. The original signal is subjected to i-time wavelet decomposition, each decomposition separates out a high-frequency noise signal and a low-frequency useful signal, wherein A1,A2,A3,......,AiFor low frequency signals, D1,D2,D3,......,DiIs a high frequency signal. The high frequency noise signal in each decomposition is processed to discard the noise-containing part. Finally, the high-frequency noise signal D is processed1,D2,D3,......,DiAnd AiAnd performing wavelet reconstruction. The noise-reduced signal is shown in fig. 9, where the dark portion is the noise-reduced signal and the light portion is the original signal. The number of sampling points is 1500.
Through tests, the comparison between the mean value and the variance of the signals before and after noise reduction is as follows:
before X-axis filtering, mean 969.93580978 variance 0.00182
After X-axis filtering, mean 969.93576757 variance was 0.00036
Mean-185.61674988 variance 0.00111 before Y-axis filtering
After Y-axis filtering, the mean-185.61668668 variance was 0.00024
Before Z-axis filtering, mean-3.21273165 variance 0.00097
After Z-axis filtering, the mean-3.21270108 variance was 0.00021
It can be seen that the average value change amplitude of the X, Y, Z axis measurement signals before and after filtering is not large, and the variance of the X, Y, Z axis measurement signals after filtering is obviously reduced, which proves that the random noise in the original measurement signals can be well inhibited after wavelet filtering.
The output values of six positions obtained by averaging the noise-reduced measurement signals are shown in the table:
and substituting actual measurement values of six positions into an error model equation, wherein error coefficients are as follows:
the error compensation model of the triaxial accelerometer is as follows:
the outputs before and after calibration were compared as follows:
the X, Y, Z outputs of the triaxial accelerometer before compensation are 969.936mg, -185.617mg, -3.213mg respectively, and after error mathematical model compensation, the X, Y, Z outputs are 999.128mg, -0.0423mg and 0.0358mg respectively, which are very close to the theoretical values of 1000mg, 0mg and 0 mg. The scheme can well improve the precision of the triaxial accelerometer, and the effect is obvious. Preferably, combine with aforementioned 5 axle acceleration sensor, the utility model discloses can reduce the precision requirement to single acceleration sensor components and parts by a wide margin, reduce use cost.
Take the monitoring of the landslide body as an example, the utility model discloses a 4 vertical measurement steps of flexible monitoring devices do:
a cartesian coordinate system XYZ is established from the reference vector n, coinciding with its coordinate system. When a certain carrier coordinate system X, Y, Z rotates, a measurable physical quantity M exists in the carrier coordinate system, and the measurable physical quantity M during the movement of the carrier can be expressed as:
wherein: b is the translation amount of the carrier coordinate system, M is the pure rotation amount around the origin of coordinates, and C is the rotation matrix between the two coordinate systems. Therefore, the attitude measurement in the three-dimensional space can obtain the rotation matrix C, that is, the attitude of the carrier in the three-dimensional space, by constructing the fixed reference vector n and the physical M after the rotation of the measurement carrier.
When the measured structure body deforms, three sensitive axes of the three-axis MEMS accelerometer rotate, and a coordinate system is X after the three sensitive axes rotate2Y2Z2. According to the core thought of the Euler angle method, a coordinate system X is rotated2Y2Z2Can be determined from an initial coordinate system X0Y0Z0Obtained by three spatial rotations, the rotation matrix C can be expressed as:
the measurement a of the tri-axial MEMS accelerometer can be expressed as:
wherein: a represents the acceleration in XYZ axes after rotation, respectively, in the initial stateAssuming that there is no translation but a rotation relationship between the two coordinate systems, and b is always equal to 0, then:
wherein: a is thetaxWhen the flexible displacement meter is vertically buried in a structure, the settlement and expansion in the vertical direction are not considered, namely the gravity acceleration in the Z-axis direction is not measured, and the following parameters are kept in the formula:
wherein: a isx,ayAre tilt angles along the X-axis and Y-axis directions.
The projection of the inclination angle in the direction of the X, Y axis in a single measurement and control unit L on the horizontal plane is the horizontal displacement, and can be expressed as:
wherein: dx, Dy are displacements along the X and Y axes, respectively, D is along alphatiltThe overall displacement in direction. The whole flexible displacement meter consists of N measurement and control units with fixed length L, and the horizontal displacement of the Mth measurement and control unit on the whole measuring line can be expressed as follows:
in the formula: and i is the number of each measurement and control unit. When the original point is arranged at the far-end fixed section, the number of the far-end fixed end measurement and control unit is 1, and the units are sequentially increased from bottom to top along the axial direction. The displacement when M-N is the total accumulated horizontal displacement over the entire flexible displacement meter line.
The landslide motion direction is determined according to X marks drawn on the surface of the flexible displacement meter. The positive direction of the X axis is defined as the calibrated 0 degree direction, and the calculated landslide combined displacement direction and the X axis direction are defined as aderBy measuring the included angle a between the X-axis direction and the geographical position of the flexible displacement meter1The absolute direction of the displacement change in the landslide body can be determined. Wherein a isderThe calculation formula is as follows:
take the large-scale structure thing to subside as the example, the utility model discloses a device level measurement step is:
the flexible monitoring device 4 can be embedded in the building horizontally to measure the uneven settlement of the foundation. Wherein the direction along the flexible monitoring device 4 is the X-axis direction, the horizontal side direction is the Y-axis direction, and the vertical direction is the Z-axis direction. The near-end fixed knot of the flexible monitoring device 4 is set as the origin of coordinates, and the coordinates of the fixed end are 0 and 0. The settlement value of a single measurement and control unit can be expressed as:
Dy=L×sinθx
wherein: a. thexFor the X-axis output value, theta, of the three-axis acceleration sensorxIs the angle between the X sensitive axis and the horizontal plane, DyIs the displacement in the plane perpendicular to XOY. And calculating the displacement of each section of the measurement and control unit in the vertical direction, and accumulating the displacement section by section to obtain a settlement curve along the whole horizontal measuring line.
Example 2: adopted in certain hydraulic engineering's sluice the utility model discloses a scheme, this sluice gate build the year earlier, end using the utility model discloses a be close 50 years before the scheme. The safety identification shows that the safety problem is serious, and the safety protection device cannot be normally used according to the original design. Newly-built gate has adopted the utility model discloses an array displacement monitoring devices monitors the deformation of sluice. The near end of the array type displacement monitoring device is fixed on a reserved concrete cover plate outside a water gate left bank hoist chamber and is set as a measurement origin. In order to facilitate the protection and installation of the traction end of the cable 3 of the flexible monitoring device 4, a steel pipe needs to be pre-buried between an outdoor concrete steel plate and an indoor opening and closing machine in advance. The pre-buried protection tube adopts a galvanized steel tube, the outer diameter of the galvanized steel tube is 50mm, the wall thickness is 3.5mm, the length is 10000mm, the size of the concrete cover plate is 20cm multiplied by 5cm, and the exposed length of the galvanized steel tube on the surface of the concrete cover plate is not less than 5 cm. In order to ensure that the flexible monitoring device 4 does not shake in the galvanized steel pipe, the exposed end of the galvanized steel pipe and the concrete cover plate need to be welded and fixed firmly, and meanwhile, the flexible monitoring device 4 and the concrete cover plate need to be welded and fixed firmly. The ports of the pre-buried galvanized steel pipes are wrapped by geotextile to be closed, so that sundries at the pipe openings are prevented from entering the pipes and damaging instruments.
In order to facilitate the installation and fixation of the flexible monitoring device 4, the measuring line is arranged at the groove of the original tension wire horizontal displacement meter. In order to prevent the flexible displacement meter from directly contacting with the ground of the hoist chamber, a manufactured and customized 304 stainless steel support is adopted between the flexible displacement meter and the ground of the hoist chamber to be elevated. When the 304 stainless steel supports are manufactured, firstly, the laser level meter is used for positioning the horizontal elevation, and each 304 stainless steel support is manufactured according to the positioning height of the laser level meter. When the 304 stainless steel bracket is processed and manufactured, the following quality requirements are met:
the stainless steel plate 1 is flat, straight and burr-free.
And 2, the stainless steel flat plate is firmly welded with the lower supporting structure to form an integral structure.
3, the stainless steel square pipe at the lower part of the stainless steel flat plate is manufactured to ensure the verticality and cannot generate the inclined condition.
4 the length of each stainless steel bracket is strictly matched with the length of a single measurement and control unit of the flexible displacement meter, and the length of each bracket is 1 m.
When the sluice produces the deformation, transmit every stainless steel support to, and then the change of flexible displacement meter measurement and control unit perception displacement. The flexible displacement meter is fixedly installed in 2019, 12 and 14 days, first-time monitoring data acquisition is carried out after the flexible displacement meter is installed, and three-dimensional postures and two-dimensional projection views of the flexible displacement meter in space are shown in the figures 11-14. And taking the first monitoring data as a measurement reference value, and comparing the subsequent monitoring data with the reference value respectively. Wherein the X axis of the reference coordinate system is vertical to the water flow direction, the Y axis is along the water flow direction, and the Z axis is vertical to the flexible displacement meter direction. From fig. 12, it can be seen that the maximum horizontal displacement is 14.276mm, and from fig. 13, it can be seen that the front 10 sections of the flexible displacement meter, i.e. the portion in the galvanized steel pipe, have the maximum upward deformation of 136.714 mm. The flexible displacement meter is relatively stable in the water gate hoist chamber, and the maximum downward deformation is-354.728 mm.
The safety information platform of the administration levee can inquire information such as a real-time displacement value, a deformation rate, an accumulated deformation amount and a current water level of each measuring point of the flexible monitoring device 4. By selecting monitoring data of different time periods, the displacement change process of the flexible displacement meter can be demonstrated in an animation mode, and the operation is very simple and convenient.
Thresholds for the rate of deformation and the amount of accumulated deformation may be set in the secure messaging system. When the real-time monitoring data of the flexible displacement meter exceeds a set threshold value, the monitoring platform can automatically send early warning information to related management unit personnel.
From the continuous monitoring results of about 5 months, the density degree of the monitoring curve of the flexible monitoring device 4 can be seen, the sedimentation deformation rate of the sluice is gradually increased and then gradually reduced, and finally the sluice tends to be stable, and the sedimentation maximum value is near the structural joint position between the gates. The deformation of the structural seam is the largest in the opening and closing process of the gate, and the general rule of the deformation of the water gate is met. In general, the monitoring result of the flexible monitoring device 4 can well reflect the deformation rule of the sluice along the axial sedimentation, and meanwhile, the installation and fixation process of the flexible monitoring device 4 can ensure that the flexible monitoring device and the sluice are well synchronously coordinated and deformed.
The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims (10)

1. The utility model provides an array displacement monitoring devices, includes a plurality of monitoring festival (1), connects characterized by through flexible coupling pipe (2) between monitoring festival (1): an acceleration sensor (100) is arranged in the monitoring section (1), the acceleration sensor (100) is electrically connected with a collecting device (105), the collecting device (105) is electrically connected with a computing device (106), and the computing device (106) is electrically connected with a data transmitting device;
an axial acceleration sensor (104) is arranged in the monitoring section (1), and the monitoring direction of the axial acceleration sensor (104) is along the axial direction of the monitoring section (1);
two-axis acceleration sensors are further arranged at the two ends of the monitoring section (1), and the monitoring directions of the two-axis acceleration sensors are along the cross section direction of the monitoring section (1).
2. The array displacement monitoring device of claim 1, wherein: the monitoring directions of the two biaxial acceleration sensors have a difference of 30-60 degrees on the circumference.
3. The array displacement monitoring device of claim 1, wherein: the flexible connecting pipe (2) is a stainless steel corrugated pipe, and two ends of the stainless steel corrugated pipe are fixedly connected with the monitoring joint (1) through threads.
4. The array displacement monitoring device of claim 1, wherein: the flexible connecting pipe (2) is a pressure-resistant rubber pipe, and a steel wire mesh framework is arranged in the pressure-resistant rubber pipe.
5. The array displacement monitoring device of any one of claims 3 or 4, wherein: spherical particles with the diameter within 1-12 mm are filled in the flexible connecting pipe (2).
6. The array displacement monitoring device of claim 1, wherein: the data sending device is also electrically connected with a wireless transmission device (5), and the wireless transmission device (5) is connected with a cloud server (6);
the cloud server (6) is connected with the terminal (8) through the interactive system (7).
7. A monitoring festival, characterized by: an axial acceleration sensor (104) is arranged in the monitoring section (1), and the monitoring direction of the axial acceleration sensor (104) is along the axial direction of the monitoring section (1);
two-axis acceleration sensors are further arranged at the two ends of the monitoring section (1), and the monitoring directions of the two-axis acceleration sensors are along the cross section direction of the monitoring section (1).
8. A monitoring node according to claim 7, wherein: the monitoring directions of the two biaxial acceleration sensors have a difference of 10-80 degrees on the circumference.
9. A monitoring node according to claim 7, wherein: the monitoring directions of the two biaxial acceleration sensors have a difference of 30-60 on the circumference.
10. A monitoring node according to claim 7, wherein: the monitoring directions of the two biaxial acceleration sensors are different by 45 degrees on the circumference.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113074692A (en) * 2021-03-03 2021-07-06 蔡德所 Array type displacement monitoring system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113074692A (en) * 2021-03-03 2021-07-06 蔡德所 Array type displacement monitoring system

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