A dual-tube fully automated layered inclinometer system and inclinometer method

Abstract

The present invention relates to a double-tube fully automated layered inclinometer system, comprising two inclinometer tubes A and B, two inclinometer probes A and B, the two inclinometer tubes A and B are arranged in parallel and spaced apart, a pulley assembly is installed at the top pipe openings of the two inclinometer tubes A and B respectively through concentric pipe head brackets, the two ends of the synchronous belt respectively bypass the two pulley assemblies to penetrate into the two inclinometer tubes A and B and are respectively connected to the two inclinometer probes A and B, the middle part of the synchronous belt bypasses the synchronous reduction wheel set, the synchronous reduction wheel set is connected to the servo motor, and the servo motor is controlled by a control system. The present invention effectively eliminates instrument errors, truly realizes unmanned and automated, and has the characteristics of strong operability, high degree of automation, low cost, real-time, accuracy, etc.

Description

Technical Field

[0001] The invention belongs to the field of deep horizontal displacement monitoring, relates to an inclinometer, and in particular to a double-tube fully automatic layered inclinometer system and an inclinometer method. Background Art

[0002] Deep horizontal displacement monitoring is often used in deep foundation pit monitoring, vacuum preloading areas, and monitoring of structures such as dams and docks. It is one of the main means to understand the deep changes in deep foundation pits, slopes and foundation soils.

[0003] The inclinometer is mainly composed of a pre-buried inclinometer tube, a probe, a control cable, a pulley device and a readout instrument. The first observation can record the initial data of the displacement of the inclinometer tube. Subsequent observations will show the change in the displacement of the section when the ground moves. During the observation, the probe moves from the bottom to the top of the inclinometer tube, pausing at every half-meter interval and reading certain data. The measured inclination angle can be converted into lateral displacement. By comparing the current and initial observation data, the change in lateral offset can be determined, showing the movement displacement of the formation.

[0004] When observing with an inclinometer, in order to eliminate and reduce the zero drift and assembly error of the instrument, after the displacement measurement in the positive direction is completed, the probe is turned 180 degrees in the opposite direction to measure the data again to eliminate the influence of zero drift and instrument error.

[0005] At present, the traditional inclinometer method is manual operation. First, the probe is lowered to a predetermined depth, and then the measurement is made from bottom to top. However, in actual operation, the operation of the instrument requires high technical skills of the workers, and the labor cost is high, time-consuming and labor-intensive. In areas such as docks and mud receiving areas, the equipment is greatly affected by the harsh natural environment and there may be safety risks. Data collection is greatly affected by the environment and has poor continuity. In addition, each measurement requires an ascent or descent of 50 cm, which cannot be accurately controlled by manual measurement, which will bring about a large deviation and inevitably produce human errors in the measurement data, resulting in low accuracy. In addition, the frequency of manual monitoring is low, the monitoring data has a lag, and the real-time performance is poor. The equipment is greatly affected by construction interference and the data cannot be shared.

[0006] The fixed inclinometers that are currently being studied more use inclination sensors to measure and convert displacement data. This is because fixed inclinometers require high accuracy (angle error is no more than 0.005 degrees), and each sensor is expensive and greatly affected by temperature. The installation spacing is too affected by cost (spacing 1 to 2 meters), so this installation cannot meet the accuracy and specification requirements. In addition, the fixed sensor cannot eliminate the errors caused by zero drift, temperature drift and equipment every time it is powered on. This error is generally large in value and has a certain degree of randomness, which cannot be effectively eliminated, resulting in unsatisfactory measurement results, or even deviating from the actual soil displacement.

[0007] Some scholars have also tried to use automatic unidirectional sliding, but they were unable to eliminate or reduce the effects of the instrument's zero drift, temperature drift, instrument error, and assembly error.

[0008] The above traditional methods do not provide substantial solutions to the problems of how to reduce the impact of errors, reduce costs, and control the sliding distance of instruments. In order to overcome a series of problems such as traditional displacement monitoring methods and determine horizontal displacement monitoring more accurately and in real time, a dual-tube fully automated layered inclinometer system is proposed. Summary of the invention

[0009] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a dual-tube fully automated layered inclinometer system and inclinometer method, which has the characteristics of strong operability, high degree of automation, low cost, real-time, accurate and recyclable.

[0010] The technical solution adopted by the present invention to solve the technical problem is:

[0011] A double-tube horizontal displacement layered inclinometer system comprises two inclinometer tubes A and B and two inclinometer probes A and B. The two inclinometer tubes A and B are arranged in parallel and spaced apart. A pulley assembly is installed at the top pipe openings of the two inclinometer tubes A and B respectively through concentric pipe head brackets. Two ends of a synchronous belt respectively bypass the two pulley assemblies and penetrate into the two inclinometer tubes A and B and are respectively connected to the two inclinometer probes A and B. The middle part of the synchronous belt bypasses a synchronous reduction wheel group, and the synchronous reduction wheel group is connected to a servo motor, which is controlled by a control system.

[0012] Moreover, the control system includes a main processor PLC and a 4G wireless transparent transmission module, a touch screen, a solar cell control unit, a sensor data interaction unit, a power identification control unit, and a memory unit respectively connected to the main processor PLC.

[0013] Moreover, the 4G wireless transparent transmission module includes a microcontroller and an RS485 communication unit, a 4G network transceiver chipset, and an Ethernet controller respectively connected to the microcontroller. The Ethernet controller is connected to the Internet cloud control system, and the microcontroller is connected to the main processor PLC.

[0014] Moreover, the distance between the two inclinometer tubes A and B is 0.8 to 1.2 m (greater than 3 times the borehole diameter).

[0015] A double-tube horizontal displacement layered inclinometer method, firstly, adjust the A inclinometer probe to the lowest initial position of the inclinometer tube, and the control system controls the servo motor to move forward, so that the A inclinometer probe rises and the B inclinometer probe falls. When the A inclinometer probe rises to a predetermined height, the control system controls the servo motor to move in the reverse direction, so that the A inclinometer probe falls and the B inclinometer probe rises.

[0016] The horizontal displacement of the foundation soil at the i-th step is set to [Si],

[0017] A The calculated value when the inclinometer probe rises is [Si A上 ],

[0018] A The calculated value when the inclinometer probe descends is [Si A下 ],

[0019] The calculated value of the inclinometer probe rise is [Si B上 ],

[0020] The calculated value of the inclinometer probe drop is [Si B下 ].

[0021] Calculated value of horizontal displacement of tube A [Si A ]=[Si A上 ]+([Si A上 ]-[Si A下 ]) / 2

[0022] Calculated value of horizontal displacement of tube B [Si B ]=[Si B上 ]+([Si B上 ]-[Si B下 ]) / 2

[0023] Then adjust the calculated values ​​of the horizontal displacement of pipes A and B, that is, [Si] = [Si A ]+([Si A ]-[Si B ]) / 2, and finally the final displacement can be calculated by accumulation.

[0024] The Internet cloud control system sends test instructions through the 4G wireless transparent transmission module. After receiving the instructions, the main processor PLC controls the servo motor to move. After the action is completed, the sensor data interaction unit saves the data to the memory and sends the data to the Internet cloud control system through the 4G wireless transparent transmission module.

[0025] The advantages and positive effects of the present invention are:

[0026] 1. This system and method can not only effectively eliminate the errors caused by the probe zero drift and the probe travel device, but also obtain the layered horizontal displacement in two directions, and the spacing can be increased to 0.20m (theoretically 0.10m). The use of servo motors can accurately ensure the consistency of each rise or fall distance, and the accuracy is controlled within 2mm, which is much higher than manual measurement accuracy, so the data is more accurate.

[0027] 2. By setting up special automatic monitoring equipment, instrument errors are effectively eliminated, truly realizing unmanned and automated operation, with the characteristics of strong operability, high degree of automation, low cost, real-time and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 is a circuit block diagram of the present invention;

[0030] Figure 3 It is a data collection flow chart of the present invention. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0032] A double-tube horizontal displacement layered inclinometer system comprises two inclinometer tubes 10.12 A and B, two high-precision inclinometer probes 9.11 A and B, a concentric tube head bracket 8, a servo motor 4, a synchronous reduction wheel set 5, a synchronous belt 6 and a controller.

[0033] The two inclinometer tubes A and B are arranged in parallel with each other, and the distance between the tubes is 1.0m. A certain pulley 7 is installed at the top pipe openings of the two inclinometer tubes A and B through a concentric pipe head bracket. The two ends of the synchronous belt bypass the two fixed pulleys and penetrate into the two inclinometer tubes A and B and are respectively connected to the two high-precision inclinometer probes A and B. The middle part of the synchronous belt bypasses the synchronous reduction wheel set, and the synchronous reduction wheel set is connected to the servo motor, and the servo motor is controlled by the control system.

[0034] After the cable is connected in series with the AB probe, it is fixed on the synchronous belt, moved out in the B tube, wound around the winch, and then connected to the system. The winch is installed in the control box.

[0035] The control system includes a main processor PLC and a 4G wireless transparent transmission module, a touch screen, a solar cell control unit, a sensor data interaction unit, a power identification control unit, and a memory clock unit respectively connected to the main processor PLC. The 4G wireless transparent transmission module includes a microcontroller and an RS485 communication unit, a 4G network transceiver chipset, and an Ethernet controller respectively connected to the microcontroller. The Ethernet controller is connected to the Internet cloud control system, and the microcontroller is connected to the main processor PLC.

[0036] The main processor PLC adopts SSDC03-R step servo drive system, and the 4G wireless transparent transmission module DTU model is: USR-G780V2. The servo motor model is AM17RS1DM, the static torque is 0.26Nm, the solar cell power is 200W, and the voltage is 36V. The touch screen adopts a 7-inch capacitive screen, model E-2020.

[0037] The entire control system is integrated into a control box 2, on which a solar panel 1 and a touch screen 3 are installed, which truly realizes fully automatic monitoring without human intervention. In order to overcome the influence of extreme weather, the device is also equipped with a backup battery and a power identification system. When the battery power is low, an alarm will be issued to remind people to replace it manually. In addition, the system is low in cost and recyclable, and has high research value.

[0038] The working process of the control system is:

[0039] ⑴ Equipment self-test: After the instrument is installed, the main processor PLC device is powered on, and the self-test command is input on the touch screen. After receiving the data, the main processor PLC controls the servo motor to move back and forth. At this time, it is confirmed that all links of the device are working normally. After the test is completed, the two high-precision inclinometer probes A and B return to the initial position and return to zero; the communication equipment is powered on, and the 4G wireless transparent transmission module communicates with the two high-precision inclinometer probes A and B. After confirming that the received data is normal in the cloud, the equipment self-test is completed.

[0040] ⑵Testing stage: Set the basic information of the collector in the cloud, including the collection frequency and other information, input the measurement interval, measurement starting point, number of measurement points and other instructions on the touch screen, and save the setting information to the memory.

[0041] The Internet cloud control system sends the test command through the 4G wireless transparent transmission module. After receiving the command, the main processor PLC controls the servo motor to move. After the action is completed, the sensor data interaction unit saves the data to the memory and sends the data to the Internet cloud control system through the 4G wireless transparent transmission module. Figure 3 After one cycle is completed, the test will continue. After the unidirectional test is completed, the main processor PLC controls the servo motor to move in the reverse direction, and then conducts reverse measurement until the two high-precision inclinometer probes A and B return to their initial positions. From then on, the test is considered completed.

[0042] The operation process of this system is:

[0043] 1. Drill holes and bury A and B inclinometer tubes. The center distance between the two inclinometer tubes should not be less than 1.0m, and the drilling depth should exceed the test depth by no less than 3m;

[0044] 2. Assembly: Ensure that the fixed pulley is fully lubricated and well sealed. Place the probe in tube A and connect it to the synchronous belt. The belt passes through the concentric nozzle bracket of tube A, install the synchronous reduction wheel set, and then passes through the concentric nozzle bracket of tube B, and then connects to another high-precision probe.

[0045] 3. After assembly, adjust probe A to the lowest initial position of the inclinometer tube, power on the equipment, test the equipment operation, and adjust the equipment to the initial position when everything is normal.

[0046] 4. Monitoring process: The horizontal displacement of the soil layer can be calculated by the sensor data interaction unit. The probe in tube A rises, and the probe in tube B falls. The servo motor is controlled to move intermittently through the sensor data interaction unit and the main processor PLC. Since the number of turns and the angle accuracy of the servo motor are highly consistent, the step length of the probe rising and falling process can be guaranteed to be consistent. The step length is set to 0.20m~0.50m through the main processor PLC as needed. When the probe stops moving, the sensor data interaction unit will collect multiple groups of data in the probe. After calculation, if the data change meets the instrument error requirement, that is, the limit value meets the requirement, the data will be sent to the 4G wireless transparent transmission module. When the probe in tube A rises to the predetermined height, the main processor PLC controls the motor to move in the opposite direction. At this time, the probe in tube A falls, and the probe in tube B rises, and the process is repeated.

[0047] Data processing principle: It is generally believed that the displacement change of soil layers is consistent in such a small spacing (less than 1.0m), and the difference is almost negligible. Therefore, the data measured by the two probes are theoretically consistent. However, due to the zero drift of the probe, there may be a certain deviation. Recently, many methods cannot solve this problem. This method corrects the following data during data processing:

[0048] The horizontal displacement of the foundation soil at the i-th step is set to [Si],

[0049] A The calculated value when the inclinometer probe rises is [Si A上 ],

[0050] A The calculated value when the inclinometer probe descends is [Si A下 ],

[0051] The calculated value of the inclinometer probe rise is [Si B上 ],

[0052] The calculated value of the inclinometer probe drop is [Si B下 ].

[0053] Calculated value of horizontal displacement of tube A [Si A ]=[Si A上 ]+([Si A上 ]-[Si A下]) / 2

[0054] Calculated value of horizontal displacement of tube B [Si B ]=[Si B上 ]+([Si B上 ]-[Si B下 ]) / 2

[0055] Then adjust the calculated values ​​of the horizontal displacement of pipes A and B, that is, [Si] = [Si A ]+([Si A ]-[Si B ]) / 2. Finally, the final displacement can be calculated by accumulation.

[0056] This is the displacement data in one [X] direction. Since this patent uses a dual-axis probe, the displacement in the other [Y] direction can also be calculated using the above method.

[0057] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept, which all belong to the protection scope of the present invention.

Claims

1. A double-tube horizontal displacement layered inclinometer system, characterized in that: It comprises two inclinometer tubes A and B and two inclinometer probes A and B. The two inclinometer tubes A and B are arranged in parallel and spaced apart. A pulley assembly is installed at the top pipe openings of the two inclinometer tubes A and B respectively through concentric pipe head brackets. Both ends of the synchronous belt respectively bypass the two pulley assemblies and penetrate into the two inclinometer tubes A and B and are respectively connected to the two inclinometer probes A and B. The middle part of the synchronous belt bypasses the synchronous reduction wheel set, and the synchronous reduction wheel set is connected to the servo motor, which is controlled by the control system. The inclinometer method of the system is as follows: firstly, adjust the A inclinometer probe to the lowest initial position of the inclinometer tube, and the control system controls the servo motor to move forward, so that the A inclinometer probe rises and the B inclinometer probe falls. When the A inclinometer probe rises to a predetermined height, the control system controls the servo motor to move in the reverse direction, so that the A inclinometer probe falls and the B inclinometer probe rises. The horizontal displacement of the foundation soil at the i-th step is set to [Si], A The calculated value when the inclinometer probe rises is [Si A上 ], A The calculated value when the inclinometer probe descends is [Si A下 ], The calculated value of the inclinometer probe rise is [Si B上 ], The calculated value of the inclinometer probe drop is [Si B下 ], Calculated value of horizontal displacement of tube A[Si A ]=[Si A上 ]+([Si A上 ]-[Si A下 ]) / 2 Calculated value of horizontal displacement of tube B [Si B ]=[Si A上 ]+([Si B上 ]-[Si B下 ]) / 2 Then adjust the calculated values ​​of the horizontal displacement of pipes A and B, that is, [Si] = [Si A ]+([Si A ]-[Si B ]) / 2, and finally the final displacement can be calculated by accumulation.

2. The double-tube horizontal displacement layered inclinometer system according to claim 1 is characterized in that: The control system includes a main processor PLC and a 4G wireless transparent transmission module, a touch screen, a solar cell control unit, a sensor data interaction unit, a power identification control unit, and a memory unit respectively connected to the main processor PLC.

3. The double-tube horizontal displacement layered inclinometer system according to claim 2 is characterized in that: The 4G wireless transparent transmission module includes a microcontroller and an RS485 communication unit, a 4G network transceiver chipset, and an Ethernet controller respectively connected to the microcontroller. The Ethernet controller is connected to an Internet cloud control system, and the microcontroller is connected to a main processor PLC.

4. The double-tube horizontal displacement layered inclinometer system according to claim 1 is characterized in that: The distance between the two inclinometer tubes A and B is 0.8 to 1.2 m.

5. The double-tube horizontal displacement layered inclinometer system according to claim 1 is characterized in that: The Internet cloud control system sends test instructions through the 4G wireless transparent transmission module. After receiving the instructions, the main processor PLC controls the servo motor to move. After the action is completed, the sensor data interaction unit saves the data to the memory and sends the data to the Internet cloud control system through the 4G wireless transparent transmission module.

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