Slope damage time determination method and system based on angular velocity reciprocal method
阅读说明：本技术 基于角速度倒数法的边坡破坏时间确定方法及系统 (Slope damage time determination method and system based on angular velocity reciprocal method ) 是由 赵江 王天鹏 肖智安 张洁 贾自恒 肖诗豪 马丽娜 李志祥 于 2020-06-19 设计创作，主要内容包括：本发明涉及一种基于角速度倒数法的边坡破坏时间确定方法及系统,包括：获取角度传感器采集的角度数据；所述角度传感器设置在待预报边坡上,所述角度传感器为多个；根据所述角度数据确定边坡监测点位处角速度；根据所述角速度,采用角速度倒数法确定角速度倒数-时间的云图；根据所述角速度倒数-时间的云图确定边坡破坏时间。通过本发明的上述方法能够直接对边坡破坏时间进行确定,其结果更可靠。(The invention relates to a slope destruction time determination method and a system based on an angular velocity reciprocal method, wherein the method comprises the following steps: acquiring angle data acquired by an angle sensor; the angle sensors are arranged on the slope to be forecasted, and the number of the angle sensors is multiple; determining the angular speed of the slope monitoring point position according to the angle data; determining a cloud picture of the reciprocal of the angular velocity-time by adopting a reciprocal method of the angular velocity according to the angular velocity; and determining slope damage time according to the cloud picture of the reciprocal angular velocity-time. The method can directly determine the slope damage time, and the result is more reliable.)
1. A slope destruction time determination method based on an inverse angular velocity method is characterized by comprising the following steps:
acquiring angle data acquired by an angle sensor; the angle sensors are arranged on the slope to be forecasted, and the number of the angle sensors is multiple;
determining an angular velocity from the angle data;
determining a cloud picture of the reciprocal of the angular velocity-time by adopting a reciprocal method of the angular velocity according to the angular velocity;
and determining slope damage time according to the cloud picture of the reciprocal angular velocity-time.
2. The method for determining slope collapse time based on the reciprocal angular velocity method according to claim 1, wherein the determining the slope collapse time according to the cloud image of the reciprocal angular velocity-time further comprises:
acquiring a slope time threshold;
judging whether the slope damage time is smaller than the slope time threshold value or not to obtain a judgment result;
if the judgment result shows that the slope damage time is greater than or equal to the slope time threshold, sending an alarm;
and if the judgment result shows that the slope damage time is less than the slope time threshold, acquiring the angle data again, and returning to the step of acquiring the angle data acquired by the angle sensor.
3. The method for determining slope collapse time based on the reciprocal angular velocity method according to claim 1, wherein the determining the slope collapse time according to the cloud image of the reciprocal angular velocity-time further comprises:
and sending the slope damage time to a display device, so that the display device displays the slope damage time.
4. The method for determining the slope collapse time based on the reciprocal angular velocity method according to claim 1, wherein the determining the slope collapse time according to the cloud map of the reciprocal angular velocity-time specifically comprises:
according to the formula
5. A slope destruction time determination system based on an inverse angular velocity method, comprising:
the angle data acquisition module is used for acquiring angle data acquired by the angle sensor; the angle sensors are arranged on the slope to be forecasted, and the number of the angle sensors is multiple;
the angular velocity determining module is used for determining the angular velocity according to the angle data;
the angular velocity reciprocal-time cloud picture determining module is used for determining a cloud picture of angular velocity reciprocal-time by adopting an angular velocity reciprocal method according to the angular velocity;
and the slope damage time determining module is used for determining the slope damage time according to the cloud picture of the angular speed reciprocal-time.
6. The inverse angular velocity-based slope violation time determination system of claim 5, further comprising:
the slope time threshold acquisition module is used for acquiring a slope time threshold;
the judging module is used for judging whether the slope damage time is smaller than the slope time threshold value or not to obtain a judgment result;
the warning module is used for sending out a warning if the judgment result shows that the slope damage time is greater than or equal to the slope time threshold;
and the returning module is used for re-acquiring the angle data and returning the angle data to the angle data acquiring module if the judgment result shows that the slope damage time is smaller than the slope time threshold.
7. The slope destruction time determination method based on the reciprocal angular velocity method according to claim 5, wherein the slope destruction time determination system further includes:
and the display module is used for sending the slope damage time to display setting so that the display equipment displays the slope damage time.
8. The method for determining a slope collapse time based on the reciprocal angular velocity method according to claim 5, wherein the slope collapse time determining module specifically comprises:
according to the formulaDetermining the slope damage time; wherein B and B are both empirical constants, tfThe slope damage time is t, the monitoring time is t, and omega is the angular speed at the t moment.
Technical Field
The invention relates to the technical field of geological disaster prevention and control, in particular to a slope damage time determination method and system based on an angular velocity reciprocal method.
Background
Slope damage is a common geological disaster around the world, and causes huge economic loss and casualties every year. The method is used for accurately predicting the slope damage occurrence time and is of great importance to the slope disaster early warning. Although slope stability analysis based on soil mechanics has been widely applied to slope design, such analysis cannot accurately predict the time to failure of a slope. Since all factors affecting slope stability will eventually be reflected in slope deformation, monitoring slope deformation has proven to be one of the most effective methods of predicting slope failure time.
Currently, monitoring systems are generally arranged in slopes to predict the possible occurrence of slip or damage phenomena of the slope. Precision measurement stations and sensors are often employed to record monitored data of slope deformation, for example, using speed sensors, inclinometers, Global Positioning System (GPS) and geophones. The slope damage time is forecasted by generally adopting a speed reciprocal method, slope monitoring data are converted into speed (speed), usually, before slope damage, the speed of displacement, strain or micro-seismic activity is increased, then the strain speed of the slope is obtained, and the speed reciprocal method is used for forecasting the slope damage time. However, this method has the following problems: 1. the monitoring based on equipment such as a speed sensor, a GPS or a geophone and the like is expensive, the arrangement of more speed sensor equipment in a slope with a larger area is not economical, and the arrangement of instruments is too little and good monitoring and forecasting effects cannot be achieved; 2. the monitoring is carried out based on simple equipment, the operation is simple and convenient, but only a small range area can be monitored, the sensitivity and the automation degree are not high, and the monitoring efficiency is low.
Disclosure of Invention
The invention aims to provide a slope damage time determination method and system based on an angular velocity reciprocal method, and solves the problems of high instrument price and low monitoring efficiency in the prior art.
In order to achieve the purpose, the invention provides the following scheme:
a slope destruction time determination method based on an angular velocity reciprocal method comprises the following steps:
acquiring angle data acquired by an angle sensor; the angle sensors are arranged on the slope to be forecasted, and the number of the angle sensors is multiple;
determining an angular velocity from the angle data;
determining a cloud picture of the reciprocal of the angular velocity-time by adopting a reciprocal method of the angular velocity according to the angular velocity;
and determining slope damage time according to the cloud picture of the reciprocal angular velocity-time.
Optionally, after determining the slope failure time according to the cloud image of the reciprocal angular velocity-time, the method further includes:
acquiring a slope time threshold;
judging whether the slope damage time is smaller than the slope time threshold value or not to obtain a judgment result;
if the judgment result shows that the slope damage time is greater than or equal to the slope time threshold, sending an alarm;
and if the judgment result shows that the slope damage time is less than the slope time threshold, acquiring the angle data again, and returning to the step of acquiring the angle data acquired by the angle sensor.
Optionally, after determining the slope failure time according to the cloud image of the reciprocal angular velocity-time, the method further includes:
and sending the slope damage time to a display device, so that the display device displays the slope damage time.
Optionally, the determining the slope damage time according to the cloud picture of the reciprocal of the angular velocity-time specifically includes:
according to the formulaDetermining the slope damage time; wherein B and B are both empirical constants, tfThe slope damage time is t, the monitoring time is t, and omega is the angular speed at the t moment.
A slope collapse time determination system based on the reciprocal angular velocity method, comprising:
the angle data acquisition module is used for acquiring angle data acquired by the angle sensor; the angle sensors are arranged on the slope to be forecasted, and the number of the angle sensors is multiple;
the angular velocity determining module is used for determining the angular velocity according to the angle data;
the angular velocity reciprocal-time cloud picture determining module is used for determining a cloud picture of angular velocity reciprocal-time by adopting an angular velocity reciprocal method according to the angular velocity;
and the slope damage time determining module is used for determining the slope damage time according to the cloud picture of the angular speed reciprocal-time.
Optionally, the slope damage time determination system further includes:
the slope time threshold acquisition module is used for acquiring a slope time threshold;
the judging module is used for judging whether the slope damage time is smaller than the slope time threshold value or not to obtain a judgment result;
the warning module is used for sending out a warning if the judgment result shows that the slope damage time is greater than or equal to the slope time threshold;
and the returning module is used for re-acquiring the angle data and returning the angle data to the angle data acquiring module if the judgment result shows that the slope damage time is smaller than the slope time threshold.
Optionally, the slope damage time determination system further includes:
and the display module is used for sending the slope damage time to display setting so that the display equipment displays the slope damage time.
Optionally, the slope damage time determining module specifically includes:
according to the formulaDetermining the slope damage time; wherein B and B are both empirical constants, tfThe slope destruction time, t is the monitoring time, and omega is the angular velocity at the moment of t
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
according to the invention, the angle sensor is used for collecting the side slope angle, and then the side slope damage time is determined by adopting the angular velocity reciprocal method, so that the defects of high price and insufficient accuracy of an instrument in the velocity reciprocal method are overcome, the cost is reduced and the accuracy is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a flowchart of a slope collapse time determination method based on an inverse angular velocity method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an arrangement of angle sensors according to an embodiment of the present invention;
FIG. 3 is a plot of reciprocal angular velocity versus time provided by an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a slope collapse time determination system based on an inverse angular velocity method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a slope damage time determination method and system based on an angular velocity reciprocal method, and solves the problems of high instrument price and low monitoring efficiency in the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a flowchart of a slope collapse time determination method based on an inverse angular velocity method according to an embodiment of the present invention. As shown in fig. 1, the method for determining a slope destruction time according to the present invention includes:
s101, acquiring angle data acquired by an angle sensor; the angle sensors are arranged on the side slope to be forecasted, and the number of the angle sensors is multiple.
Specifically, an angle sensor and a receiving and processing device are arranged on the slope to be forecasted to form a monitoring system. However, monitoring is performed based on the GPS and the remote sensing image, and the monitoring system is sensitive, but the cost is high, the operation is complex, and the degree of influence of the environment on the device is large. Therefore, the invention adopts the angle sensors, in the actual engineering, a fully-covered side slope angle data monitoring network can be arranged on a side slope to be monitored, and the angle sensors are low in price and can be arranged in large quantity, so that the sensors are arranged to form a grid network so as to be better monitored, the side slope grid arrangement form is shown in figure 2, the distance between the arrangement rows and the arrangement columns of the angle sensors is determined by the size of the side slope, and the angle sensors are densely distributed at the rugged parts or the weak parts of the side slope.
When arranging the angle sensors, it should be noted that: when the angle sensors are arranged, the monitoring points are arranged on the side slope in a full-coverage mode, the monitoring points are arranged at the weak positions or the rugged positions of the side slope in an encrypted mode, and the sensors are uniformly linked to a plurality of receiving and processing devices to collect data.
And S102, determining the angular speed according to the angle data.
Specifically, the angular speed is determined according to the monitored side slope angle data, namely, a side slope angular speed data cloud picture is drawn, the monitoring system can visually display the angular speed value of each monitoring point of the side slope so as to draw the angular speed cloud picture, the larger the angular speed value is, the closer the forecast time of side slope damage is, and the secondary inspection can be performed on the side slope in a targeted manner.
And S103, determining the cloud picture of the reciprocal of the angular velocity-time by adopting a reciprocal method of the angular velocity according to the angular velocity.
And S104, determining slope damage time according to the cloud picture of the reciprocal angular velocity-time.
The cloud picture is based on formula
Specifically, assuming that a plurality of segments of slope bodies of the natural slope generate a larger angular velocity at the slope accelerated destruction stage, a relationship between the slope angular velocity and the angular acceleration can be established to fit the relationship between the time and the deformation, as shown in formula (1):
wherein B and B are empirical constants; ω is the angular velocity at time t,is the angular acceleration at time t. When b > 1, integrated over time, there are:
wherein, ω isfIs the angular velocity at which the slope is broken, i.e. tfThe angular velocity at the moment may be a fixed value or an infinite value for the natural slope,
when ω isfWhen ∞, the formula (2) can be simplified to:
the specific parameter range of b > 1 can be determined by experiments, when ω is a larger value, the right side of the equation approaches zero, and the slope damage time can be obtained, as shown in fig. 3, and the intercept from the curve extension line to the abscissa is the slope damage time. The slope and shape of the curve will vary according to the magnitude of the empirical parameter b, depending on the actual engineering.
Based on the inverse angular velocity theory, the angular velocity of the side slope is determined according to the side slope angle data obtained through monitoring, then the inverse angular velocity on the side slope monitoring point is calculated according to the angular velocity, generally, the inverse angular velocity of the side slope instability damage is assumed to be 0, the assumed condition is matched with the characteristic that the side slope deformation rate of the side slope is increased in the accelerated damage stage, and when the increment of the angular velocity of the side slope in a short time is increased by orders of magnitude, the angular velocity of the side slope instability damage can be approximately considered to be infinite. It is of course also possible to extrapolate the angular velocity to a certain value, which can be determined empirically. The limit value is determined according to the safety level of the slope, and the slope damage time can be obtained by utilizing the reciprocal angular velocity method explained above.
After S104, further comprising:
4-1) obtaining a slope time threshold; 4-2) judging whether the slope damage time is smaller than the slope time threshold value to obtain a judgment result; 4-3) if the judgment result shows that the slope damage time is greater than or equal to the slope time threshold, sending an alarm; 4-4) if the judgment result shows that the slope damage time is smaller than the slope time threshold, re-acquiring the angle data, and returning to the S101.
Specifically, a limit value of the destruction time, namely a slope time threshold value, is set, and the monitoring system warns monitoring personnel after the limit value is reached. The monitoring personnel can monitor the health condition of the side slope remotely, the monitoring system can display and forecast the damage time of the side slope in real time, if the forecast time reaches a certain limit value, if the side slope is likely to be damaged after 7 days, an early warning is sent to the monitoring personnel so as to check and process the health condition of the side slope, and the limit value is set according to the factors of the engineering condition of the side slope, the emergency environment and the like.
The monitoring system is connected with the warning lamps, when the time of slope damage reaches a limit value, an alarm is given, the angle sensors of each monitoring point are connected with each other, the LED warning lamps are arranged on the sensors, and when the slope angular speed of a certain monitoring point reaches the limit value, the warning lamps can be directly lighted at the point so as to display the specific position of the slope which tends to be damaged, and data are uniformly summarized and monitored by the processing device. If the side slope is in the accelerated destruction stage and has a gradual destruction trend, and the side slope destruction time limit value is reached, the monitoring system gives out a warning alarm, and the LED warning lamp is lightened.
After S104, further comprising: and sending the slope damage time to a display device, so that the display device displays the slope damage time.
Specifically, the slope angular velocity data can also be displayed in real time in the display setting, and is refreshed every several minutes, so that the state of the slope is monitored in real time.
The present invention also provides a slope collapse time determination system based on an inverse angular velocity method, as shown in fig. 4, including:
the angle data acquisition module 1 is used for acquiring angle data acquired by an angle sensor; the angle sensors are arranged on the side slope to be forecasted, and the number of the angle sensors is multiple.
And the angular velocity determining module 2 is used for determining the angular velocity according to the angle data.
And the cloud picture determining module 3 is used for determining the cloud picture of the reciprocal angular velocity-time by adopting a reciprocal angular velocity method according to the angular velocity.
And the slope damage time determining module 4 is used for determining the slope damage time according to the cloud picture of the reciprocal of the angular velocity-time.
Preferably, the slope damage time determination system further includes:
and the slope time threshold acquisition module is used for acquiring a slope time threshold.
And the judging module is used for judging whether the slope damage time is smaller than the slope time threshold value to obtain a judgment result.
And the alarm module is used for sending an alarm if the judgment result shows that the slope damage time is greater than or equal to the slope time threshold.
And the returning module is used for re-acquiring the angle data if the judgment result shows that the slope damage time is less than the slope time threshold value, and returning to the angle data acquiring module 1.
Preferably, the slope damage time determination system further includes:
and the display module is used for sending the slope damage time to display setting so that the display equipment displays the slope damage time.
Preferably, the slope damage time determination module 4 specifically includes:
according to the formulaDetermining the slope damage time; wherein B and B are both empirical constants, tfThe slope damage time is t, the monitoring time is t, and omega is the angular speed at the t moment.
The monitoring system is formed by arranging the angle sensor and the processing equipment on the slope to be monitored, collects and processes the angle data of the slope, and forecasts the slope damage time according to the angular velocity reciprocal method. The method can overcome the defects of high cost and insufficient accuracy in slope damage forecasting based on the speed reciprocal method, and has the advantages of simplicity and convenience in use, good applicability, good economic benefit and high judgment accuracy.
The invention has the advantages that:
(1) the angle sensor and the processing equipment used for monitoring the side slope are low in price and good in economic benefit.
(2) The arrangement of the angle sensors is convenient, a large number of angle sensors can be arranged on the side slope to be monitored, and the coverage rate is high.
(3) The reciprocal angular velocity method is similar to the reciprocal velocity method in principle and has certain feasibility.
(4) The warning lamp can visually display the position of the slope which is possibly cracked or collapsed after being linked with the monitoring system.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.