A tolerance type settlement monitoring device, system and method

Abstract

The present invention specifically discloses a tolerance type settlement monitoring device, which is connected to an external air guide pipe and a liquid guide pipe. The tolerance type settlement monitoring device includes a tank body, a partition plate, a ventilation pipe and a pressure sensor; The present invention also discloses a tolerance type settlement monitoring system, which includes at least two tolerance type settlement monitoring devices as described above, a liquid storage tank, an air guide pipe, a liquid guide pipe and a host computer; The present invention also discloses a tolerance type settlement monitoring method, which includes: monitoring a pressure signal and selecting a reference point; obtaining a first pressure signal change value and obtaining a second pressure signal change value; obtaining a settlement value. The present invention improves the adaptability to the environment, improves the detection accuracy, overcomes the problem of pipeline blockage, improves the construction efficiency, reduces the failure rate and maintenance cost, and avoids the volatilization of liquid media.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring instruments, and particularly relates to a tolerance type settlement monitoring device, system and method. Background Art

[0002] As Figure 1 , Figure 2 shown, the existing connected pipe type settlement monitoring system currently consists of a pressure type static level (such as H1-Hn of Figure 1 ) or a liquid level type static level (such as L1-Ln of Figure 2 ), a reference level liquid storage tank (such as Y4 of Figure 1 / Figure 2 ), a liquid conduction medium (such as Y1 of Figure 1 / Figure 2 ) connected by pipes, and a computer acquisition and monitoring platform (such as Y6 of Figure 1 / Figure 2 ).

[0003] As Figure 1 shown, the working mode of the pressure type static level: when the position of the H1 test point changes (for vertical settlement monitoring, only the vertical position change can be monitored), the height difference between the H1 test point and the liquid level of the reference tank Y4 will change, and the pressure of the H1 test point will change accordingly. The computer acquisition and monitoring platform Y6 can know the change and the change value of the position of the H1 test point by reading the pressure change of the H1 test point.

[0004] As Figure 2 shown, the working mode of the liquid level type static level: when the position of the L1 test point changes, its liquid level will change accordingly. The computer acquisition and monitoring platform Y6 can know the change and the change value of the L1 test point by reading the change value of its liquid level.

[0005] In the actual application of the existing connected pipe type settlement monitoring system, due to the influence of environmental factors, the conduction medium will shrink and expand due to temperature changes. The liquid pipeline will also shrink and expand due to its own stress changes and temperature changes. Environmental factors such as vibration and sway will affect the pipeline, and factors such as air bubbles in the pipeline medium will ultimately be transmitted to the sensors at the test points, thereby affecting the numerical accuracy of the test point sensors. Due to the self-sealing property of the pressure type static level, the pressure type static level needs to exhaust air bubbles. And exhausting air bubbles at the monitoring site is quite troublesome, especially at sites with limited environment and space; the micro air bubbles dissolved or retained in the liquid conduction medium will gradually be released under the influence of temperature or vibration, thereby increasing the difficulty of exhausting air bubbles. The work of completely exhausting air bubbles during the pipeline installation process is also very troublesome.

[0006] In the practical application of the existing connected-pipe type settlement monitoring system, the longer the pipeline and the larger the pipe diameter are, the greater the influence of the expansion of the medium is. The smaller the pipe diameter is, the longer the conduction time is due to the fluidity of the medium, and the longer the system stabilization time is. However, the influence of the expansion and stress change of the pipeline itself is greater. This has led to a contradiction in the application of the monitoring system. To enhance the reliability of monitoring, the reference point needs to be placed at a position far from the test point. To quickly and accurately reflect the changes at the test point (if the time to obtain the change amount is long, external factors will change), it is necessary to increase the diameter of the liquid connecting pipe to increase the flow velocity of the medium. However, the long distance and large diameter of the pipeline will increase the influence of external factors. Especially for long distances, the layout of the pipeline is restricted by more on-site obstacles, and the pipeline often cannot be kept in a plane or straight line, and must be high, low or bent. The height difference change of the pipeline increases the influence of the pipeline itself under the medium pressure, and the influence of its own stress change, bubbles, swaying, vibration and other factors increases, thus affecting the accuracy and reliability of the monitoring data.

[0007] In the practical application of the existing connected-pipe type settlement monitoring system, in the face of a long pipeline, the medium is preferably selected with a small viscosity coefficient and low volatility. Water is a medium with relatively strong fluidity, but the volatility of water is relatively high and often needs to be replenished for long-term monitoring. When water is exposed to the air for a long time, it is inevitable that impurities and bacteria will dissolve or enter, resulting in water quality changes and even microbial growth, seriously affecting the accuracy of the monitoring data. Selecting other oily media, because their viscosity coefficients are much larger than that of water, for long-distance pipelines, their fluidity will cause the system to take a long time to stabilize. During the stabilization time, the changes in external environmental factors increase, which also affects the reliability and accuracy of the detection data.

[0008] The connected-pipe type settlement monitoring system using a pressure type static level generally adopts a series connection method, that is, the liquid guide pipe Y3, the air guide pipe Y2, and the cable Y6 pass through the pressure type static level H1 and then are connected to the pressure type static level H2, and extend to the next pressure type static level until the pressure type static level Hn. When a pressure type static level has problems and needs to be repaired or replaced, all the instruments on the pipeline are in a stopped state, and it is very likely that the entire system will need to be re-exhausted and replenished with liquid.

[0009] In the practical application of the connected-pipe type settlement monitoring system using a liquid level type static level, there is a certain distance between the test points. According to the relevant national specifications and relevant monitoring requirements, there must be a corresponding distance between the reference point and the monitoring point (usually ranging from dozens of meters to hundreds of meters, and even longer in some environments). And there are usually slight differences (differences of several Pa or dozens of Pa) in the air pressure of the atmospheric environment at each local test point. For many solutions that directly connect the ventilation holes of the static level to the atmosphere, such as Figure 2As shown in the figure, when there is a high pressure p′2 at the L2 position and a low pressure p′n at the Ln position, the liquid level at the L2 position will be lower than the liquid level of the reference level, while the liquid level at the Ln position will be higher than the liquid level of the reference level. The difference in local air pressure has a very significant impact on the test accuracy of settlement (the settlement value often needs to be accurate to the 10 Pa level, that is, the millimeter level), seriously affecting the test accuracy. Moreover, in the case of a large local air flow (such as wind blowing), a direct connection to the atmosphere will cause a larger air pressure difference at the air connection port of the hydrostatic level, further increasing the error value of the hydrostatic level. Summary of the Invention

[0010] In view of this, it is necessary to propose a tolerance type settlement monitoring device, system and method for the above problems to solve the deficiencies in the above background technology.

[0011] To achieve the above object, the present invention adopts the following technical solutions:

[0012] A tolerance type settlement monitoring device is connected to an external air duct and a liquid duct. The tolerance type settlement monitoring device includes a tank body, a partition board, an air duct and a pressure sensor; the partition board is arranged in the tank body and divides the tank body into an upper and a lower sealed liquid storage cavity and an air cavity; the sealed liquid storage cavity stores a liquid medium; the pressure sensor is installed in the air cavity, and the partition board is provided with a hydraulic detection through hole, and the detection probe of the pressure sensor is installed in the hydraulic detection through hole; the air duct is arranged in the tank body and penetrates through the partition board; one port of the air duct is arranged in the sealed liquid storage cavity and is higher than the liquid level of the liquid medium, and the other port of the air duct is arranged in the air cavity; the air duct is communicated with the air cavity; the liquid duct is communicated with the sealed liquid storage cavity, and the communication port of the liquid duct with the sealed liquid storage cavity is lower than the liquid level of the liquid medium in the sealed liquid storage cavity;

[0013] The air duct is used to balance the air pressure between the sealed liquid storage cavity and the air cavity;

[0014] The pressure sensor is used to detect the hydraulic pressure of the liquid medium in the sealed liquid storage cavity.

[0015] A tolerance type settlement monitoring system includes at least two tolerance type settlement monitoring devices as described above, a liquid storage tank, an air duct, a liquid duct and a host computer; the liquid storage tank stores a liquid medium;

[0016] The host computer communicates with each of the pressure sensors;

[0017] The liquid duct is communicated with the liquid storage tank, and the communication port of the liquid duct with the liquid storage tank is lower than the horizontal liquid level of the liquid medium in the liquid storage tank;

[0018] The air duct is communicated with the liquid storage tank, and the communication port of the air duct with the liquid storage tank is higher than the horizontal liquid level of the liquid medium in the liquid storage tank;

[0019] The liquid guide pipe is communicated with each of the sealed liquid storage cavities, and the communication port of the liquid guide pipe with the sealed liquid storage cavity is lower than the horizontal liquid level of the liquid medium in the corresponding sealed liquid storage cavity;

[0020] The air duct is communicated with each air cavity;

[0021] The liquid storage tank is used for storing a liquid medium;

[0022] The air duct is used for balancing the air pressure between the inside of the liquid storage tank and each air cavity;

[0023] The liquid guide pipe is used for balancing the hydraulic pressure between the inside of the liquid storage tank and each sealed liquid storage cavity;

[0024] The upper computer is used for reading and analyzing the pressure signals of each pressure sensor.

[0025] Further, the tolerance type settlement monitoring system further includes pipeline switches that are equal in number to and in one-to-one correspondence with the tolerance type settlement monitoring devices; the liquid guide pipe is communicated with each of the sealed liquid storage cavities through the corresponding pipeline switch;

[0026] The pipeline switch is used for controlling the opening and closing of the communication port of the liquid guide pipe with the sealed liquid storage cavity.

[0027] A tolerance type settlement monitoring method includes:

[0028] Monitoring the pressure signals of the pressure sensors of each tolerance type settlement monitoring device, and selecting one tolerance type settlement monitoring device as the reference point tolerance type settlement monitoring device;

[0029] Obtaining the first pressure signal change value of the pressure sensor of the reference point tolerance type settlement monitoring device, and obtaining the second pressure signal change value of the pressure sensors of the tolerance type settlement monitoring devices other than the reference point tolerance type settlement monitoring device;

[0030] According to the first pressure signal change value and the second pressure signal change value, obtaining the settlement value of the tolerance type settlement monitoring devices other than the reference point tolerance type settlement monitoring device where the pressure signal changes.

[0031] Further, the settlement value ΔP of the tolerance type settlement monitoring devices other than the reference point tolerance type settlement monitoring device where the pressure signal changes is ΔP = Δp1 - ΔP0; ΔP1 is the second pressure signal change value; ΔP0 is the first pressure signal change value.

[0032] The beneficial effects of the present invention are:

[0033] When laying pipelines in the present invention, the height changes do not affect the system monitoring data. High-precision settlement data can be obtained in an environment with high temperature differences, long distances, and large ranges, and it can meet the settlement monitoring requirements of the vast majority of outdoor environments.

[0034] The tank body of the present invention isolates the sealed liquid storage cavity, the air cavity from the external atmosphere. The sealed liquid storage cavity is not only connected to the air cavity through a vent pipe, but also makes the air pressure on the back of the pressure sensor equal to the air pressure borne by the liquid level in the sealed liquid storage cavity; the sealed liquid storage cavities at each non-reference point are connected to the sealed liquid storage cavity of the tolerance type settlement monitoring device at the reference point through a liquid guide pipe. There is only one vent hole in the whole system communicating with the atmosphere (usually at the reference position), making the air pressure of the whole system the same, and also eliminating the influence of local air pressure changes and local air flow changes in the outside world on the system. The present invention makes it easier for the residual air bubbles in the tolerance type settlement monitoring device and the liquid guide pipe to discharge and dissipate by themselves, and the liquid medium in the liquid guide pipe flows more smoothly and quickly.

[0035] The present invention can use a high-power liquid pump for liquid perfusion and exhaust (in the traditional method, due to the limited anti-impact pressure value of the sensor, it cannot be used), which increases the construction efficiency and reduces the construction difficulty; moreover, when a certain instrument needs to be repaired or replaced in the present invention, the pipeline switch can be closed for operation without affecting the system operation.

[0036] The present invention can use pipelines with a large diameter as much as possible within the allowable range of on-site construction conditions to increase the fluidity of the liquid and reduce the system stabilization time.

[0037] The present invention selects water as the liquid medium (water is currently a medium with the best conductivity and fluidity). A small amount of medium with a density slightly less than that of water and very low volatility is added to each tolerance type settlement monitoring device and liquid storage tank to form a thin film on the water surface to isolate the external air. The closed structure of the present invention ensures the fluidity and conductivity of the liquid medium, and effectively prevents the volatilization of water. In actual applications, according to observations: the evaporation volume in six months is less than 1‰. Therefore, the present invention ensures the feasibility of long-term monitoring and the simplicity of operation.

[0038] The present invention replenishes liquid to the tolerance type settlement detector that has settled through a liquid storage tank, and liquid storage tanks are added to the pipeline (the corresponding number is added according to the length of the pipeline and the actual environment), which can greatly suppress the fluctuation of the test values caused by environmental factors. Description of the Drawings

[0039] Figure 1 It is a schematic structural diagram of a monitoring system using a pressure type static level as the prior art;

[0040] Figure 2Structural schematic diagram of a monitoring system using a liquid-level static level gauge in the prior art;

[0041] Figure 3 Structural schematic diagram of a tolerance-type settlement monitoring device of the present invention;

[0042] Figure 4 Structural schematic diagram of a tolerance-type settlement monitoring system of the present invention;

[0043] Figure 5 Working flowchart of a tolerance-type settlement monitoring method of the present invention;

[0044] Explanation of reference numerals:

[0045] Gas guide pipe - 100; Liquid guide pipe - 200; Tank body - 1; Partition board - 2; Vent pipe - 3; Pressure sensor - 4; Liquid storage tank - 300; Host computer - 400; Sealed liquid storage cavity - 11; Air cavity - 12; Pipeline switch - 500. Detailed implementation manners

[0046] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be further described clearly and completely below in conjunction with the embodiments of the present invention. It should be noted that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0047] It should be understood that the orientation or positional relationships indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention.

[0048] Terms such as "first", "second", "third", "fourth", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", "third", "fourth" may explicitly or implicitly include one or more of such features.

[0049] Embodiment

[0050] As Figure 3As shown in the figure, a tolerance type settlement monitoring device is connected with an air duct 100 and a liquid guide pipe 200. The tolerance type settlement monitoring device includes a tank body 1, a partition plate 2, a ventilation pipe 3 and a pressure sensor 4. The partition plate 2 is arranged inside the tank body 1 and divides the tank body 1 into an upper and a lower sealed liquid storage cavity 11 and an air cavity 12. The sealed liquid storage cavity 11 stores a liquid medium. The pressure sensor 4 is installed in the air cavity 12. The partition plate 2 is provided with a hydraulic detection through hole, and the detection probe of the pressure sensor 4 is installed in the hydraulic detection through hole. The ventilation pipe 3 is arranged inside the tank body 1 and penetrates through the partition plate 2. One port of the ventilation pipe 3 is arranged in the sealed liquid storage cavity 11 and is higher than the horizontal liquid level of the liquid medium. The other port of the ventilation pipe 3 is arranged in the air cavity 12. The air duct 100 is communicated with the air cavity 12. The liquid guide pipe 200 is communicated with the sealed liquid storage cavity 11, and the communication port of the liquid guide pipe 200 with the sealed liquid storage cavity 11 is lower than the horizontal liquid level of the liquid medium in the sealed liquid storage cavity 11.

[0051] The ventilation pipe 3 is used to balance the air pressure between the sealed liquid storage cavity 11 and the air cavity 12.

[0052] The pressure sensor 4 is used to detect the hydraulic pressure of the liquid medium in the sealed liquid storage cavity 11.

[0053] As Figure 4 shown, a tolerance type settlement monitoring system includes at least two tolerance type settlement monitoring devices as described above, a liquid storage tank 300, an air duct 100, a liquid guide pipe 200 and a host computer 400. The liquid storage tank 300 stores a liquid medium.

[0054] The host computer 400 communicates with each of the pressure sensors 4.

[0055] The liquid guide pipe 200 is communicated with the liquid storage tank 300, and the communication port of the liquid guide pipe 200 with the liquid storage tank 300 is lower than the horizontal liquid level of the liquid medium in the liquid storage tank 300.

[0056] The air duct 100 is communicated with the liquid storage tank 300, and the communication port of the air duct 100 with the liquid storage tank 300 is higher than the horizontal liquid level of the liquid medium in the liquid storage tank 300.

[0057] The liquid guide pipe 200 is communicated with each of the sealed liquid storage cavities 11, and the communication port of the liquid guide pipe 200 with the sealed liquid storage cavity 11 is lower than the horizontal liquid level of the liquid medium in its corresponding sealed liquid storage cavity 11.

[0058] The air duct 100 is communicated with each of the air cavities 12.

[0059] The liquid storage tank 300 is used to store a liquid medium.

[0060] The air duct 100 is used to balance the air pressure between the inside of the liquid storage tank 300 and each air chamber 12;

[0061] The liquid guide pipe 200 is used to balance the hydraulic pressure between the inside of the liquid storage tank 300 and each sealed liquid storage chamber 11;

[0062] The host computer 400 is used to read and analyze the pressure signals of each pressure sensor 4.

[0063] Furthermore, the tolerance type settlement monitoring system further includes pipeline switches 500 that are equal in number to and in one-to-one correspondence with the tolerance type settlement monitoring devices; the liquid guide pipe 200 is communicated with each sealed liquid storage chamber 11 through the corresponding pipeline switch 500;

[0064] The pipeline switch 500 is used to control the opening and closing of the communication port between the liquid guide pipe 200 and the sealed liquid storage chamber 11.

[0065] Specifically, each tolerance type settlement monitoring device (test point) is connected to the liquid guide pipe 200 by means of a tee joint, and a pipeline switch 500 is installed on the tee joint.

[0066] As Figure 4-5 shown, a tolerance type settlement monitoring method includes:

[0067] Monitoring the pressure signals of the pressure sensors 4 of each tolerance type settlement monitoring device, and selecting one tolerance type settlement monitoring device as the reference point tolerance type settlement monitoring device;

[0068] Obtaining the first pressure signal change value of the pressure sensor 4 of the reference point tolerance type settlement monitoring device, and obtaining the second pressure signal change value of the pressure sensors 4 of the tolerance type settlement monitoring devices other than the reference point tolerance type settlement monitoring device;

[0069] According to the first pressure signal change value and the second pressure signal change value, obtaining the settlement value of the tolerance type settlement monitoring devices other than the reference point tolerance type settlement monitoring device where the pressure signal changes.

[0070] Preferably, at the reference position, the reference point tolerance type settlement monitoring device is installed beside the liquid storage tank 300 (theoretically, the liquid storage tank 300 can be installed at any position in the reference position or the liquid guide pipeline).

[0071] Furthermore, the settlement value ΔP of the tolerance type settlement monitoring devices other than the reference point tolerance type settlement monitoring device where the pressure signal changes is ΔP = ΔP1 - ΔP0; ΔP1 is the second pressure signal change value; ΔP0 is the first pressure signal change value.

[0072] For example, in actual use, asFigure 4 As shown, a liquid medium (such as low-viscosity oil, antifreeze, pure water, etc.) is filled into the liquid storage tank 300 and the liquid guide pipe 200. Due to the conductivity of the liquid medium, the liquid storage tank 300, such as Figure 4 the reference point tolerance type settlement monitoring device (hereinafter referred to as T0) at the T0 position of, such as Figure 4 the reference point tolerance type settlement monitoring device (hereinafter referred to as T1) at the T1 position of... such as Figure 4 the reference point tolerance type settlement monitoring device (hereinafter referred to as Tn) at the Tn position of have the same liquid level height of the medium liquid. When affected by various external factors, it will ultimately cause the volume change of the liquid medium and lead to the change of the liquid level. The pressure values of T0, T1... Tn change accordingly. However, their change values are the same. The host computer 400 (specifically, a computer acquisition and monitoring platform) collects the data of each point and processes it. Taking T1 as an example: when the external influence causes the pressure value P1 of T1 to change, its change value is ΔP1; the pressure value P0 of the reference point T0 will also change by the same amount, and its change value is ΔP0; since the two changes are the same, their difference is zero. When reflected in the position change of T1, it is zero. When the position of T1 changes, due to the conductivity of the liquid, the horizontal liquid level of T1 remains the same as the horizontal liquid level of the liquid storage tank 300, but the liquid height in T1 will change. This causes the sensor pressure value of T1 to change, that is, ΔP1. The settlement value ΔP of the T1 point = ΔP1 - ΔP0. Thus, the values of T2... Tn are all the same. Thus, the numerical errors caused by various external factors are greatly eliminated.

[0073] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A tolerance type settlement monitoring device is connected to an external air duct (100) and a liquid guide pipe (200), characterized in that, The tolerance type settlement monitoring device includes a tank body (1), a partition plate (2), a ventilation pipe (3) and a pressure sensor (4); the partition plate (2) is arranged inside the tank body (1), and divides the tank body (1) into an upper and a lower sealed liquid storage cavity (11) and an air cavity (12); the sealed liquid storage cavity (11) stores a liquid medium; the pressure sensor (4) is installed in the air cavity (12), the partition plate (2) is provided with a hydraulic detection through hole, and the detection probe of the pressure sensor (4) is installed in the hydraulic detection through hole; the ventilation pipe (3) is arranged inside the tank body (1), and the ventilation pipe (3) penetrates through the partition plate (2); one port of the ventilation pipe (3) is arranged in the sealed liquid storage cavity (11) and is higher than the horizontal liquid level of the liquid medium, and the other port of the ventilation pipe (3) is arranged in the air cavity (12); the air guide pipe (100) is communicated with the air cavity (12); the liquid guide pipe (200) is communicated with the sealed liquid storage cavity (11), and the communication port of the liquid guide pipe (200) with the sealed liquid storage cavity (11) is lower than the horizontal liquid level of the liquid medium in the sealed liquid storage cavity (11). The ventilation pipe (3) is used to balance the air pressure between the sealed liquid storage cavity (11) and the air cavity (12). The pressure sensor (4) is used to detect the hydraulic pressure of the liquid medium in the sealed liquid storage cavity (11).

2. A tolerance type settlement monitoring system, characterized in that, The tolerance type settlement monitoring system includes at least two tolerance type settlement monitoring devices as described in claim 1, a liquid storage tank (300), an air guide pipe (100), a liquid guide pipe (200) and a host computer (400); the liquid storage tank (300) stores a liquid medium. The host computer (400) communicates with each of the pressure sensors (4). The liquid guide pipe (200) is communicated with the liquid storage tank (300), and the communication port of the liquid guide pipe (200) with the liquid storage tank (300) is lower than the horizontal liquid level of the liquid medium in the liquid storage tank (300). The air guide pipe (100) is communicated with the liquid storage tank (300), and the communication port of the air guide pipe (100) with the liquid storage tank (300) is higher than the horizontal liquid level of the liquid medium in the liquid storage tank (300). The liquid guide pipe (200) is communicated with each of the sealed liquid storage cavities (11), and the communication port of the liquid guide pipe (200) with the sealed liquid storage cavity (11) is lower than the horizontal liquid level of the liquid medium in its corresponding sealed liquid storage cavity (11). The air guide pipe (100) is communicated with each of the air cavities (12). The liquid storage tank (300) is used to store a liquid medium. The air guide pipe (100) is used to balance the air pressure between the inside of the liquid storage tank (300) and each of the air cavities (12). The liquid guide pipe (200) is used to balance the hydraulic pressure between the inside of the liquid storage tank (300) and each of the sealed liquid storage cavities (11). The host computer (400) is used to read and analyze the pressure signals of each of the pressure sensors (4).

3. The tolerance type settlement monitoring system according to claim 2, characterized in that, The tolerance type settlement monitoring system further includes pipeline switches (500) that are equal in number to and in one-to-one correspondence with the tolerance type settlement monitoring devices; the liquid guide pipes (200) are communicated with each of the sealed liquid storage cavities (11) through the corresponding pipeline switches (500); The pipeline switch (500) is used to control the opening and closing of the communication port between the liquid guide pipe (200) and the sealed liquid storage cavity (11).

4. A tolerance type settlement monitoring method, applied to the tolerance settlement detection device of claim 1 or 2, characterized in that, It includes: Monitoring the pressure signals of the pressure sensors (4) of each tolerance type settlement monitoring device, and selecting one tolerance type settlement monitoring device as the reference point tolerance type settlement monitoring device; Obtaining the first pressure signal change value of the pressure sensor (4) of the reference point tolerance type settlement monitoring device, and obtaining the second pressure signal change value of the pressure sensors (4) of the tolerance type settlement monitoring devices other than the reference point tolerance type settlement monitoring device; According to the first pressure signal change value and the second pressure signal change value, obtaining the settlement value of the tolerance type settlement monitoring device with a pressure signal change other than the reference point tolerance type settlement monitoring device.

5. The tolerance-based settlement monitoring method according to claim 4, wherein The settlement value △P of the tolerance type settlement monitoring device with a pressure signal change other than the reference point tolerance type settlement monitoring device is △P = △P1 - △P0; △P1 is the second pressure signal change value; △P0 is the first pressure signal change value.

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