A settlement monitoring system based on static level and measurement and calibration method

Abstract

The present invention discloses a settlement monitoring system based on a static level and a measurement and calibration method, including a plurality of measuring point sensors and at least three base point sensors connected together through a liquid circuit and a gas circuit, wherein the measuring point sensors and the base point sensors both include a static level sensor, a liquid storage tank is connected to the measuring point sensors and the base point sensors through a liquid circuit and a gas circuit, and a monitoring platform is connected to the measuring point sensors, the base point sensors and the liquid storage tank through an electrical connection. Through multi-base point joint measurement and a settlement measurement method for measuring points and a settlement monitoring system self-calibration method disclosed in the present invention, the self-calibration of the system can be achieved and the settlement measurement accuracy of the measuring points can be improved, thereby overcoming the settlement measurement uncertainty caused by base point changes, and effectively improving the actual measurement accuracy of the project and the system's adaptive ability, and reducing the workload of manual intervention.

Description

Technical Field

[0001] The invention belongs to the field of construction site monitoring management, and in particular relates to a settlement monitoring system based on a static level and a measurement and calibration method. Background Art

[0002] Many buildings and main supporting structures, especially dams, retaining piles, foundation pit perimeters, pit bottom bulges, local surfaces, etc. at river construction sites need to be monitored for settlement, and most of them require long-term settlement monitoring. At present, the main instruments used for settlement monitoring are total stations, static levels, and stress gauges. The operation and use of total stations generally require professionals, and are mainly suitable for single measurements or temporary measurements, and are not suitable for long-term, continuous monitoring; stress gauges can be monitored continuously, but generally judge displacement by measuring local relative changes, including settlement displacement, but if the local whole is displaced, the stress gauge measurement is inaccurate; after the static level is installed, the base point (also called benchmark or reference point) used for comparison is generally far away from the measured point, and it is believed that it will not change. It can be used for long-term, continuous monitoring, and the long-term monitoring data can be directly obtained and recorded in the control center. It is more convenient to use and is more suitable as part of the smart site integration system.

[0003] At present, the use of static levels requires the pre-setting of base points. Generally, one base point is set and it is believed that the base point is unchanged. However, in fact, the base point may remain unchanged in the short term, but in long-term monitoring, the possibility of change still exists. Once a change occurs, it is difficult to detect and judge it in time with existing means, and it will be attributed to the change of measuring point, which will lead to inaccurate judgment of the settlement of the monitored object and easy to make operational errors. Summary of the invention

[0004] In view of the above problems, the present invention designs a settlement monitoring system and a measurement and calibration method based on a static level. By setting multiple base points and establishing a base point self-calibration method, the impact of changes in base point uncertainty can be effectively avoided.

[0005] The present invention designs a settlement monitoring system based on a static level, characterized in that it includes a plurality of measuring point sensors and at least three base point sensors connected together through a liquid circuit and a gas circuit, the measuring point sensors and the base point sensors both include static level sensors, the liquid storage tank is connected to the measuring point sensors and the base point sensors through a liquid circuit and a gas circuit, and the monitoring platform is connected to the measuring point sensors and the base point sensors through an electrical connection. The arrangement of measuring points generally needs to be determined based on the topography and landform of the construction site and the key points or key areas that need to be measured. For example, for a river construction site that needs to detect the settlement of the dam on both sides of the river, at least two or more measuring point sensors should be arranged on each side of the dam, and for a large building, measuring point sensors should be arranged around it, especially at the four corners, and other parts should be arranged according to actual needs.

[0006] Furthermore, the liquid storage tank is provided with a liquid level monitoring sensor, which is connected to the monitoring platform through an electrical connection, for monitoring the liquid level and / or whether the liquid is leaking; the capacity of the liquid storage tank is significantly larger than the capacity of the liquid pipeline, and the liquid storage tank is generally set near one of the base points.

[0007] Furthermore, the base point sensor is set at an area where settlement is not likely to occur and is far away from the measuring point sensor.

[0008] Furthermore, the liquid circuit and the gas circuit are both closed pipeline loops inside the settlement monitoring system; the gas circuits and liquid circuits of the measuring point sensors and base point sensors of the static level instrument and the liquid storage tank are interconnected.

[0009] Furthermore, the liquid in the liquid circuit includes distilled water; and the gas in the gas circuit includes air.

[0010] Furthermore, the monitoring platform realizes settlement monitoring through a computer and a software program, and the software program is used to collect the actual liquid level values ​​measured by the measuring point sensors and the base point sensors, and process, calculate, display and alarm. The software program of the monitoring platform should collect the liquid level values ​​of each measuring point sensor and the base point sensor at the same time; when there is a settlement change that exceeds the preset range, the monitoring platform sets an audible / visual alarm to remind the staff to implement on-site disposal.

[0011] The present invention provides a method for measuring point settlement of a settlement monitoring system based on a static level, comprising the following steps:

[0012] B1: Obtain the settlement change of each measuring point based on each available base point, taking the i-th measuring point as an example

[0013] Δh i,j =(h i -h i0 )-(H j -H j0 ) Formula (1)

[0014] Where Δh i,j That is, the settlement change of the sensor at the i-th measuring point based on the j-th base point, h i is the actual value of the sensor at the i-th measuring point, h i0 is the zero position of the sensor at the i-th measuring point, H j is the measured value of the jth base point sensor, H j0 is the zero position of the jth base point sensor;

[0015] B2: Get the statistical settlement of the i-th measuring point

[0016]

[0017] Where Δh i That is, the statistical settlement of the sensor at the i-th measuring point relative to the initial installation. There are m measuring points and n available base points, i∈{1,2,...,m}, j∈{1,2,...,n};

[0018] B3: Obtain the statistical settlement of all measuring points, that is, execute steps B1 to B2 cyclically for all i in i∈{1,2,...,m}.

[0019] The settlement measurement method is generally implemented after the base point calibration is completed; the zero position of the measuring point sensor is the actual measured value of the measuring point sensor when the system is initially installed, and is generally adjusted to near 0 during installation; when the settlement of the measuring point is stable at a certain stage, the stabilized liquid level height value can also be used as the new zero position to continue monitoring; the zero position of the base point sensor is the system calibration value; the available base points include base points that have not been damaged or have not undergone short-term continuous changes.

[0020] The present invention provides a self-calibration method for a settlement monitoring system based on a static level, comprising the following steps:

[0021] Self-calibration is mainly for base point sensors. Record the accumulated n base point sensors, H i is the measured value of the i-th base point sensor, H j is the measured value of the jth base point sensor, H i0 , H j0 are the zero positions of the last calibration of the i-th and j-th base point sensors, i∈{1,2,...,n}, j∈{1,2,...,n},

[0022] S1: Calculate the liquid level difference between all base point sensors

[0023] ΔH i,j =(H i -H i0 )-(H j -H j0 ) Formula (3)

[0024] Among them, i <j;

[0025] S2: Identify base points that have undergone significant settlement changes and base points that have not undergone significant settlement changes

[0026] For the set threshold value α, for all ΔH i,j Determine whether it is satisfied

[0027] ΔH i,j ≤α Formula (4)

[0028] If it satisfies, then ΔH i,jThe corresponding two base points have no obvious settlement, and the sensor zero position remains unchanged. After all base points without obvious settlement are identified, the remaining base points are considered to have obvious settlement;

[0029] The threshold value α is generally based on the measurement error σ of the static level instrument H Determine, generally can be set to σ H 1 to 3 times;

[0030] S3: Calibrate the new zero position of the base point sensor with obvious settlement

[0031] It is recorded that there are k base points without obvious settlement. For the j-th base point sensor with obvious settlement, its new zero position is:

[0032] H j0 =(-∑ i为所有未沉降基点 ΔH i,j ) / k Formula (5)

[0033] In this way, the new zero positions of all base point sensors that have undergone significant settlement can be calibrated in turn.

[0034] Furthermore, the self-calibration includes periodic calibration and / or on-demand calibration; the periodic calibration includes actively carrying out calibration at certain time intervals, and the specific time intervals can be set on the monitoring platform according to needs, such as month, quarter, half a year, or year; the on-demand calibration includes immediately carrying out calibration according to on-site conditions, such as calibration when obvious settlement changes are monitored.

[0035] The advantages and beneficial effects of the present invention are as follows: a settlement monitoring system based on a static level and a settlement measurement method for measuring a measuring point and a self-calibration method for a settlement monitoring system designed by the present invention can effectively improve the settlement measurement accuracy of the measured points by setting at least three base points, realize the self-calibration function of the system, and can be performed at any time. The present invention solves the problems of inaccurate settlement judgment of the monitored object and easy operation errors caused by the uncertainty of the settlement of a single base point itself, and at the same time reduces the need for manual re-measurement of the base points, the workload and a certain degree of blindness. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the settlement monitoring system based on the static level. DETAILED DESCRIPTION

[0037] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0038] Example 1: A settlement monitoring system based on a static level

[0039] The present invention provides a settlement monitoring system based on a static level, such as Figure 1 As shown, it is characterized by comprising a plurality of measuring point sensors and at least three base point sensors connected together through a liquid circuit and a gas circuit, wherein the measuring point sensors and the base point sensors both comprise static level sensors, the liquid storage tank is connected to the measuring point sensors and the base point sensors through a liquid circuit and a gas circuit, and the monitoring platform is connected to the measuring point sensors and the base point sensors through an electrical connection. In order to ensure the clarity of the diagram, Figure 1 Only three base point sensors and two measuring point sensors are illustrated; in actual applications, too many base points will increase the difficulty of engineering construction, and too many pipelines will increase the capacity, and the capacity requirement of the liquid storage tank may be too high; too few base points, such as setting only three base points, can meet the basic principle and method requirements of the present invention, but lack redundancy. Therefore, it is generally recommended to set 4 to 6 base points; the arrangement of measuring points generally needs to be determined based on the topography and landform of the construction site and the key points or key areas that need to be measured. For example, for a river construction site that needs to detect the settlement of the dam on both sides of the river, at least two measuring point sensors should be arranged on each side of the dam. For large buildings, measuring point sensors should be arranged around them, especially at the four corners, and other parts should be arranged according to actual needs.

[0040] This embodiment takes the monitoring of river gate and dam settlement as an example. Two measuring points are set up on each of the newly built dams and gate buildings on both sides, totaling 6 measuring points. Five base points are set up about 50 meters away from the river gate. Electrical connection and interconnection include power supply and signal transmission. The power supply can be unified through cable connection, or it can be powered by batteries at each measuring point, base point, and liquid storage tank. Signal transmission can be wired or wireless. Static level instruments generally provide a unified electrical interface for users to connect. Figure 1 In order to show the signal relationship between the various components, a single solid line is used to illustrate the electrical connection with the monitoring platform. At the same time, the physical cable connection interface of the general static level product is retained. The effect of the connection between them is equivalent to the single solid line in the figure.

[0041] Preferably, the liquid storage tank is provided with a liquid level monitoring sensor, which is connected to the monitoring platform through an electrical connection, and is used to monitor the liquid level and / or whether the liquid is leaking; the capacity of the liquid storage tank is significantly larger than the capacity of the liquid pipeline, and the liquid storage tank is generally set near one of the base points; the liquid storage tank is generally also provided with an atmospheric pressure sensor, a temperature and humidity sensor and / or other types of sensors to assist the system in working, which is a conventional setting of a static level.

[0042] Preferably, the base point sensor is set at an area that is not prone to settlement and is far away from the measuring point sensor. The base point is generally considered to be a stable point; the base point sensors are generally preferably arranged around the periphery of the measuring point area and are evenly arranged, such as the east, south, west and north directions of the construction site or the east, south, west, north, northeast, southeast, northwest and southwest directions of the points far away from the measuring point area; the base point distribution should generally be more dispersed and far apart, so as to better achieve the effect of mutual calibration, but in actual engineering applications, when the base points are too far apart, it will bring inconvenience to the construction, and at the same time, the liquid pipeline is too long, and the capacity of the liquid storage tank will also be too high; generally, the pipeline length and capacity should be calculated in advance, and the liquid storage tank capacity demand should be preliminarily estimated, and then the number, location and pipeline direction of the base points should be reasonably determined according to the geological features of the construction site, the distribution of buildings and long-term planning.

[0043] Preferably, the liquid circuit and gas circuit are both closed pipeline loops inside the settlement monitoring system. The gas circuit and liquid circuit of each measuring point sensor and base point sensor of the static level and the liquid storage tank are interconnected; equipped with a connectable standard level interface and back pressure interface, and the joint with locking function is convenient for pipeline connection operation and can ensure the sealing of the liquid circuit and gas circuit.

[0044] Preferably, the liquid in the liquid circuit includes distilled water; the gas in the gas circuit includes air. In order to effectively reduce the influence of the capillary effect, the liquid circuit pipeline should not be too thin; on the other hand, in order to reduce the capacity requirement of the liquid storage tank, the liquid circuit pipeline should not be too thick. Therefore, the above factors should be comprehensively considered in the selection of pipelines during engineering construction. The gas circuit pipeline can be selected as a hose or a hard pipe. Generally, a hose is selected, which is mainly used to keep the system at atmospheric pressure equilibrium.

[0045] Preferably, the monitoring platform realizes settlement monitoring through a computer and a software program, and the software program is used to collect the actual liquid level values ​​measured by the measuring point sensors and the base point sensors, and process, calculate, display and alarm. The software program of the monitoring platform should collect the liquid level values ​​of each measuring point sensor and the base point sensor at the same time; when there is a settlement change exceeding the preset range, the monitoring platform sets an audible / visual alarm to remind the staff to implement on-site disposal; according to the needs of the project implementation, each measuring point sensor and the base point sensor is sometimes also synchronously arranged with an air pressure sensor and / or a temperature and humidity sensor, including the air pressure sensor and / or temperature information of the liquid storage tank, and its information is used to correct the liquid level of the static level, which is the existing technology for the application of the static level; the software program of the monitoring platform generally also collects the liquid level of the liquid storage tank to monitor whether there is a leak.

[0046] Embodiment 2: A method for measuring settlement of a measuring point

[0047] A method for measuring settlement of a measuring point in a settlement monitoring system based on a static level according to Embodiment 1 comprises the following steps:

[0048] B1: Obtain the settlement change of each measuring point based on each available base point, taking the i-th measuring point as an example

[0049] Δh i,j =(h i -h i0 )-(H j -H j0 ) Formula (1)

[0050] Where Δh i,j That is, the settlement change of the sensor at the i-th measuring point based on the j-th base point, h i is the actual value of the sensor at the i-th measuring point, h i0 is the zero position of the sensor at the i-th measuring point, H j is the measured value of the jth base point sensor, H j0 is the zero position of the jth base point sensor;

[0051] B2: Get the statistical settlement of the i-th measuring point

[0052]

[0053] Where Δh i That is, the statistical settlement of the sensor at the i-th measuring point relative to the initial installation. There are m measuring points and n available base points, i∈{1,2,...,m}, j∈{1,2,...,n};

[0054] B3: Obtain the statistical settlement of all measuring points, that is, execute steps B1 to B2 cyclically for all i in i∈{1,2,...,m}.

[0055] In this embodiment, m=6, n=5;

[0056] The settlement measurement method is generally implemented after the base point calibration is completed; the zero position of the measuring point sensor is the actual measured value of the measuring point sensor when the system is initially installed, and is generally adjusted to near 0 during installation; when the settlement of the measuring point is stable at a certain stage, the stabilized liquid level value can also be used as the new zero position to continue monitoring; the zero position of the base point sensor is the system calibration value; the available base points include base points that have not been damaged or have not undergone short-term continuous changes, and the monitoring platform can intuitively display the settlement changes of each measuring point by drawing a continuous curve; formula (2) is used to make a difference to multiple base points and then take a statistical average to reduce the influence of measurement reading errors and improve the measurement accuracy of the settlement of the measuring point.

[0057] Example 3: A self-calibration method for a settlement monitoring system

[0058] A self-calibration method for a settlement monitoring system based on a static level according to Embodiment 1 comprises the following steps:

[0059] Self-calibration is mainly for base point sensors. The accumulated number of base point sensors is recorded as H. i is the measured value of the i-th base point sensor, H j is the measured value of the jth base point sensor, H i0 , H j0 are the zero positions of the last calibration of the i-th and j-th base point sensors, i∈{1,2,...,n}, j∈{1,2,...,n}. During the initial installation, the liquid level of each sensor is generally adjusted to the middle position of 0. If it is not convenient to adjust an individual sensor, its liquid level value at that time is directly recorded as the zero position of the sensor. In subsequent use, the zero position calibration of each base point sensor is mainly performed regularly or as needed. According to the real-time liquid level value of each sensor directly read by the monitoring platform, there are

[0060] S1: Calculate the liquid level difference between all base point sensors

[0061] ΔH i,j =(H i -H i0 )-(H j -H j0 ) Formula (3)

[0062] Among them, i <j;

[0063] S2: Identify base points that have undergone significant settlement changes and base points that have not undergone significant settlement changes

[0064] For the set threshold value α, for all ΔH i,j Determine whether it is satisfied

[0065] ΔH i,j ≤α Formula (4)

[0066] If it satisfies, then ΔH i,j The corresponding two base points have no obvious settlement, and the sensor zero position remains unchanged. After all base points without obvious settlement are identified, the remaining base points are considered to have obvious settlement;

[0067] The threshold value α is generally based on the measurement error σ of the static level instrument H Determine, generally can be set to σ H 1 to 3 times;

[0068] S3: Calibrate the new zero position of the base point sensor with obvious settlement

[0069] It is recorded that there are k base points without obvious settlement. For the j-th base point sensor with obvious settlement, its new zero position is:

[0070] H j0 =(-∑ i为所有未沉降基点 ΔH i,j) / k Formula (5)

[0071] In this way, the new zero position of all base point sensors that have experienced obvious settlement can be calibrated in turn; for the base points that have actually undergone settlement, continuous monitoring should be maintained for a period of time. As long as continuous settlement no longer occurs, the base point can still be used as a benchmark after calibration.

[0072] Preferably, the self-calibration includes periodic calibration and / or on-demand calibration; the periodic calibration includes actively carrying out calibration at certain time intervals, and the specific time intervals can be set according to needs on the monitoring platform, such as month, quarter, half a year, or year; the on-demand calibration includes immediately carrying out calibration according to on-site conditions, such as calibration when obvious settlement changes are monitored.

[0073] The general monitoring platform should monitor the difference ΔH between all base points simultaneously. i,j , and the change of all measuring point sensors Δh i , its continuous change can be intuitively displayed by drawing a curve, and an alarm for excessive change is set. When the preset threshold value is exceeded, the base point zero position calibration can be initiated actively, and the settlement calculation of the measuring point can be performed after the zero position calibration is completed; after the settlement of the measuring point sensor is stable in the first stage, the new value can be used as its zero position, and the alarm can be reset. If there is a continuous and obvious change in the monitoring value during the monitoring process, regardless of whether it is determined to be a change in the measuring point or the base point, an alarm should be issued and a prompt should be given to carry out key monitoring or disposal operations. If necessary, an on-site review should be organized to confirm whether there will be any dangerous situations.

[0074] Working principle of the static level system: The differential pressure measurement system consists of multiple static levels connected together by a liquid-filled PU tube, and finally connected to a liquid storage tank. Compared with the capacity of the pipeline, the liquid storage tank has a large enough capacity to effectively reduce the impact of slight changes in the pipeline capacity caused by temperature changes. The liquid storage tank and the static level arranged at a stable point are regarded as the base point. The base point must be installed at a position where the vertical displacement is relatively stable or can be measured and determined by other artificial means. Then, the relative settlement of the point can be directly measured by the data change of the static level relative to the base point.

[0075] System acquisition calculation principle: According to the connecting pipe principle, after the system is built, each measuring point is basically at the same elevation. When one end (end) of the connecting pipe is sealed, the liquid in the entire liquid pipeline is not flowing. When the measuring point deforms with the structure (settlement or bulge), the relative height difference of the measuring point relative to the liquid level in the base point storage tank changes, and the measured value of the measuring point changes accordingly. This change is the relative settlement of the measuring point. The whole system obtains the measurement value at the same time through intelligent control to eliminate the measurement error caused by inconsistent measurement time. In addition, in order to eliminate the influence of atmospheric pressure, temperature, etc., it should be considered to inject clean, disinfected, and stress-relieving distilled water into the connecting pipe as liquid to overcome capillary phenomena, and use a closed connecting pipe measurement system to achieve atmospheric pressure balance through an air connection hose. When laying out the connecting pipe system, optimize the relative position height between the longitudinal water pipe, the base point liquid level, and the measuring pipe liquid level at the measuring point. By minimizing the height of the measuring pipe and directly measuring the liquid temperature with a temperature sensor, a temperature correction coefficient is added to overcome the influence of temperature.

[0076] The basic principle of the present invention is: ignoring the low-probability event that multiple base points simultaneously settle, and deploying more than three base points. On the one hand, the settlement monitoring accuracy of the measuring points can be improved through statistical averaging; on the other hand, by comparing the base points with each other, the base points where actual settlement occurs can be identified, and the settlement amount of the settlement base points can be calibrated using the base points that have not settled; the base points can still be used as base points after the continuous settlement is completed and calibrated; when the low-probability event that multiple base points settle simultaneously occurs, an independent method is required for verification.

[0077] In summary, the present invention provides a settlement monitoring system based on a static level, a settlement measurement method for measuring measuring points based on the system, and a self-calibration method for the settlement monitoring system, which can improve the settlement monitoring accuracy of measuring points on the one hand, and realize mutual self-calibration of internal base points of the system on the other hand, thereby improving the adaptive ability of the system and reducing the workload of manual intervention. The system is suitable for long-term settlement monitoring of buildings during the construction process and after the construction is completed.

[0078] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical principles of the present invention, they can also make several improvements and modifications, including changing the number, configuration and position of measuring points and base points, replacing the static level, improving the measurement method, etc. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A self-calibration method for a settlement monitoring system based on a static level. It is characterized in that The system includes a plurality of measuring point sensors and at least three base point sensors connected together through a liquid circuit and a gas circuit, the measuring point sensors and the base point sensors both include static level sensors, the liquid storage tank is connected to the measuring point sensors and the base point sensors through a liquid circuit and a gas circuit, the monitoring platform is connected to the measuring point sensors and the base point sensors through an electrical connection, and the liquid circuit and the gas circuit are both closed pipeline loops inside the settlement monitoring system; The method for measuring the settlement of a measuring point of a settlement monitoring system based on a static level comprises the following steps: B1: Obtain the settlement change of each measuring point based on each available base point, taking the i-th measuring point as an example Formula (1) Among them, h is the settlement change of the sensor at the i-th measuring point based on the j-th base point, i is the actual value of the sensor at the i-th measuring point, h i0 is the zero position of the sensor at the i-th measuring point, H j is the measured value of the jth base point sensor, H j0 is the zero position of the jth base point sensor; B2: Get the statistical settlement of the i-th measuring point Formula (2) Among them, is the statistical settlement of the sensor at the i-th measuring point relative to the initial installation. There are m measuring points and n available base points. ; B3: Obtain the statistical settlement of all measuring points, that is, All i in the loop execute steps B1 to B2; The self-calibration method of the settlement monitoring system based on the static level comprises the following steps: Self-calibration is mainly for base point sensors. Record the accumulated n base point sensors, H i is the measured value of the i-th base point sensor, H j is the measured value of the jth base point sensor, H i0 , H j0 are the zero positions of the last calibration of the i-th and j-th base point sensors, , S1: Calculate the liquid level difference between all base point sensors Formula (3) in, ; S2: Identify base points that have undergone significant settlement changes and base points that have not undergone significant settlement changes For the set threshold value α, for all Determine whether it is satisfied Formula (4) If satisfied, it indicates The corresponding two base points have no obvious settlement, and the sensor zero position remains unchanged. After all base points without obvious settlement are identified, the remaining base points are considered to have obvious settlement; S3: Calibrate the new zero position of the base point sensor with obvious settlement It is recorded that there are k base points without obvious settlement. For the j-th base point sensor with obvious settlement, its new zero position is: Formula (5).

2. According to claim 1, a self-calibration method for a settlement monitoring system based on a static level, It is characterized in that The liquid storage tank is provided with a liquid level monitoring sensor which is connected to the monitoring platform via an electrical connection.

3. According to claim 1, a self-calibration method for a settlement monitoring system based on a static level, It is characterized in that The base point sensor is set at an area where settlement is not likely to occur.

4. A settlement monitoring system based on a static level according to claim 1, Features In the self-calibration method, the liquid in the liquid circuit includes distilled water; and the gas in the gas circuit includes air.

5. The self-calibration method for a settlement monitoring system based on a static level according to claim 1, It is characterized in that The monitoring platform realizes sedimentation monitoring through a computer and a software program. The software program is used to collect the liquid level height values ​​measured by the measuring point sensor and the base point sensor, and to process, calculate, display and alarm.

6. A self-calibration method for a settlement monitoring system based on a static level according to claim 1, It is characterized in that The self-calibration includes periodic calibration and / or on-demand calibration; the periodic calibration includes actively carrying out calibration at certain time intervals; the on-demand calibration includes immediately carrying out calibration according to on-site conditions.

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