CN112064615A - Method for measuring inclinometer of soil displacement monitoring system - Google Patents
Method for measuring inclinometer of soil displacement monitoring system Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
Abstract
An inclinometer measurement method, comprising: executing optical positioning operation after receiving an activation instruction, wherein the optical positioning operation refers to resetting the inclination angle sensor to an initial zero angle set on the circular section of the inclinometer pipe; waiting and receiving information including the measurement depth sent by the main controller, and calculating the number of measurement steps required according to the measurement distance according to the measurement depth; the second stepping motor drives the inclination angle sensor to rotate 90 degrees along the circular section of the inclinometer, and the offset inclination angle of the three-dimensional MEMS inclination angle sensor X, Y shaft relative to the direction of the vertical gravity shaft is sampled when the circular section of the inclinometer is 90 degrees; the inclinometer assembly receives clock synchronization information sent by the main controller to complete clock synchronization between the inclinometer assembly and the main controller; under the control of the main controller, the inclinometer assembly stays after moving a step distance in the inclinometer pipe under the traction of a steel cable of the lifting mechanism, and data of the inclination angle sensor at the staying position is acquired.
Description
Technical Field
The invention belongs to the technical field of engineering, and particularly relates to a method for measuring an inclinometer of a soil displacement monitoring system.
Background
In the projects of deep foundation pit enclosure, reservoir dam, landslide monitoring and the like in the building engineering, an inclinometer is widely used for quantitatively monitoring the deformation and displacement of a soil body. The inclinometry data of the inclinometer is an important basis for monitoring the body shape change and displacement of the measured soil.
The inclination measurement refers to using an inclinometer to observe the horizontal displacement in the soil body, generally adopting an inclinometer with an inclination measurement sensor inside, placing the inclinometer in a grooved guide pipe vertically buried in the measured soil body to move back and forth, measuring the inclination angle of the pipeline axis relative to a plumb line in sections, and calculating the horizontal displacement value of each section according to the length and the inclination angle of the sections. Grooved pipes are special plastic (or aluminum alloy) products in engineering inclinometer monitoring, commonly called inclinometers, and are classified into two specifications, 60 mm and 90 mm in diameter. Assuming that the depth of the soil body to be monitored is 30 meters, in principle, an inclinometer (requiring the butt joint of multiple sections of inclinometer pipes) with the total length equal to or more than 30 meters needs to be vertically embedded, and the upper end of the inclinometer pipe penetrates through the surface of the soil body to be monitored.
In the existing inclination measurement operation, a manual measurement method is mostly adopted. The manual measurement is completed by connecting the inclinometer with a signal cable marked every 500mm and manually operating the inclinometer in a standard inclinometer pipe which is embedded vertically with the soil body to be measured in advance by pulling the signal cable. Reading data once every 500mm (namely the distance of the cable stretching or lowering along the inclinometer) from the uppermost end of the inclinometer to the lowermost end of the inclinometer according to the monitoring specification; then, the inclinometer is pulled out of the inclinometer tube, the mirror surface of the inclinometer is turned over, the measurement is repeated from top to bottom, and the one-time return measurement is called to be completed.
Therefore, the labor intensity of the manual inclination measurement monitoring is high, and the measurement frequency is low (generally, each inclination measurement tube is monitored once every day, such as in the situation of large-area landslide monitoring, one measurement of a single inclination measurement tube can be realized within several days).
If adopt the inclinometer equipment that can realize automatic detection, though can partially solve artifical drawback that detects, nevertheless because on-the-spot main control computer is expensive, the function is very single, if will realize functions such as inclinometer batch data transmission, solar charging, carry out wireless charging to the inclinometer battery, still need increase in addition special module, increased automatic inclinometry equipment overall cost again like this for automatic inclinometry system is difficult to the universal adoption.
Disclosure of Invention
The invention provides a measuring method of an inclinometer, which is used for a soil displacement monitoring system and aims to solve the problems of complex operation and higher cost caused by single function of the existing inclinometer.
In one embodiment of the present invention, a method for measuring an inclinometer includes:
s101, after receiving an activation instruction sent by a main controller, an inclinometer assembly circuit executes optical positioning operation, wherein the optical positioning operation refers to resetting the inclination angle sensor to an initial zero angle set on the circular section of the inclinometer;
s102, waiting for and receiving information including the measurement depth sent by the main controller, and calculating the number of measurement steps required according to the measurement distance according to the measurement depth;
s103, driving the inclination angle sensor to rotate 90 degrees along the circular section of the inclinometer by a second stepping motor, and sampling an offset inclination angle of the three-dimensional MEMS inclination angle sensor X, Y shaft relative to the direction of the vertical gravity shaft when the circular section of the inclinometer is 90 degrees;
s104, the second stepping motor drives the inclination angle sensor to rotate to 180 degrees away from the 90-degree position, and the X, Y shaft of the three-dimensional MEMS inclination angle sensor is related to the offset inclination angle in the direction vertical to the gravity shaft when the circular section of the inclinometer is sampled to 180 degrees;
s104, in the same way, the second stepping motor sequentially drives the inclination angle sensor of the three-dimensional MEMS inclination angle sensor to move to 70 degrees and 0 degree to the position, and offset inclination angles of the X, Y axis of the three-dimensional MEMS inclination angle sensor relative to the direction of the vertical gravity axis are collected when the angles are 270 degrees and 0 degree;
s105, the inclinometer assembly receives clock synchronization information sent by the main controller, and clock synchronization between the inclinometer assembly and the main controller is completed;
s106, under the control of the main controller, the inclinometer assembly stays after moving a step distance in the inclinometer pipe under the traction of a steel cable of the lifting mechanism, and the data of the inclination angle sensor is acquired at the staying position;
and S107, repeatedly executing the previous step, and returning the inclinometer assembly to the initial position under the traction of the lifting mechanism after the preset step number is finished.
The soil displacement inclinometer measuring method disclosed by the invention combines the structural design and the calibration mode of a system clock, meets the precision requirement of geotechnical engineering monitoring specification, can be widely applied to engineering inclination measurement occasions needing large-range high-frequency monitoring and unattended operation, and is particularly suitable for occasions such as landslide, river and lake dams, reservoirs, deep foundation pit support and the like under the field and non-power network supporting environment.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:
FIG. 1 is a block diagram of a soil displacement monitoring system of the present invention.
FIG. 2 is a schematic diagram of an inclinometer assembly circuit according to one embodiment of the invention.
10-inclinometer pipe, 100-inclinometer assembly, 200-lifting mechanism, 300-main controller.
Detailed Description
In order to fully explain and deepen understanding of the principle and the technical scheme of the invention, firstly, a specific implementation method of a manual monitoring mode commonly adopted in the current engineering inclinometry and relevant specifications of the engineering inclinometry are introduced:
in the occasion of needing to monitor the horizontal displacement of the deep layer of the soil (rock), a special inclinometer with the total length not less than the monitoring depth is vertically embedded in the soil to be monitored (the length of a single inclinometer is 3 meters, and the embedding depth of more than 3 meters needs to be connected by a plurality of inclinometers) at present and widely adopted. When the horizontal displacement of the tested soil body with the embedded inclinometer tube changes, the inclinometer tube generates corresponding distortion deviating from the vertical direction, measures the value of the distortion relative to the vertical direction, and obtains the value of the horizontal displacement of the soil body through conversion. The depth of measurement in engineering inclination measurement is the buried depth of the inclination measuring pipe in the soil body, and is slightly shorter than the length of the inclination measuring pipe (because the inclination measuring pipe penetrates out of the ground of the soil body). The inclinometer tube is a special hollow round tube made of plastic (or aluminum profile), and the inner wall of the inclinometer tube is provided with through long guide slots at intervals of 90 degrees, so that the inner wall of the inclinometer tube is provided with four guide slots which are parallel to the axis of the inclinometer tube and are at intervals of 90 degrees. The inclinometer is a measuring instrument which is composed of a stainless steel waterproof pipe with the diameter of about 40 mm and the length of more than 500mm, a sensor sensitive to the inclination angle and a related electronic circuit which are arranged in the pipe, and a sealing connection interface, wherein the sealing connection interface is used for leading out measurement data and is connected with a cable which is manually drawn and marked at intervals of 500 mm; when the inclinometer is guided into the guide groove of the inclinometer tube, two pairs of guide wheels are required to be embedded into two guide grooves with the inner walls of the inclinometer tube at 180 degrees. The monitoring of an inclinometer monitoring point is usually accomplished by placing the inclinometer into the inclinometer tube starting from the upper part of the inclinometer tube (the end that penetrates out of the ground), inserting the guide wheels of the inclinometer into the guide grooves of the inclinometer tube (0 degree and 180 degrees, or 90 degrees and 270 degrees), lowering the inclinometer toward the lower end of the inclinometer tube at intervals of 500mm under the action of gravity, measuring the inclination angle of the axis of the inclinometer tube with respect to the plumb line in sections, recording the measurement data, and calculating the horizontal displacement value of each section according to the length and the inclination angle of the section until the bottom of the inclinometer tube, assuming a forward measurement. After the forward stroke measurement is finished, the inclinometer needs to be pulled out of the inclinometer tube, the inclinometer is rotated by 180 ℃ along the axis of the inclinometer tube and then is placed in two originally used guide grooves which are 180 ℃ mutually (namely mirror surface turning), the inclinometer is placed at the bottom of the inclinometer tube, the inclinometer is still lifted upwards at an interval of 500mm, measurement data are recorded and calculated until the inclinometer returns to the initial position of the upper part of the inclinometer tube, the backward stroke measurement is assumed, and the whole process measurement is finished. And (3) obtaining the absolute accumulated displacement value of the soil body of the corresponding section (finger depth) by converting the difference value of the value (a certain monitoring point and a certain burial depth value) obtained by absolute arithmetic averaging of the forward travel measurement data and the backward travel measurement data and the initial measurement value. The inclinometer is used for measuring positive and negative strokes for two times from top to bottom after the mirror surface is turned over, and the purpose is to counteract errors generated by objective factors such as mechanical assembly and the like through measuring the difference of 180 degrees for two times; according to the geotechnical engineering monitoring code, the initial measurement value must be the absolute arithmetic mean value obtained by repeating forward and backward measurements for four times.
Engineering inclinometers are currently implemented in inclinometers that are manually pulled up or down in the inclinometer. The burial depth of an inclinometer tube in an engineering inclinometry occasion is usually dozens of meters to hundreds of meters, and inclination monitoring points are usually different from a plurality of to hundreds of meters; therefore, it is difficult to monitor each monitoring point in real time by manual monitoring, or the standard requirement of measuring back 2 times/day to 4 times/day is met, and the accuracy of each pulling or lowering at intervals of 500(mm) cannot be guaranteed. Thus, in some special applications, such as large-area landslide monitoring, it is difficult to perform a large-scale real-time monitoring operation manually. The existing automatic measurement method is implemented in a mode that a plurality of inclinometers are in butt joint and filled end to end in an inclinometer pipe along an axis, and although the operation of pulling up and putting down the inclinometers manually can be replaced, 2n inclinometers need to be arranged in one inclinometer pipe with the length of n meters, the cost is high, the measurement back operation of forward and backward paths cannot be realized, and the accumulated error generated in the monitoring process is large.
In accordance with one or more embodiments, as shown in FIG. 1. A system for monitoring the displacement of soil body is composed of main controller, lifting mechanism, the slope measuring tube embedded in soil body, and the slope measuring instrument module in said slope measuring tube.
The main controller and the lifting mechanism are integrated on a control platform and are arranged on the ground of the soil body to be measured, and the upper end of the embedded inclinometer pipe penetrates out of the ground and is sleeved into and positioned in a positioning hole formed in the bottom plate of the lifting mechanism. One end of the stainless steel outer shell of the inclinometer assembly is connected with the lifting mechanism through a stainless steel cable. The main controller is provided with Bluetooth, GPRS wireless communication and RS485 wired data transmission functions, interacts control instructions and test data with an inclinometer assembly, communicates data interaction between a remote terminal service platform and a monitoring site, formulates a related communication protocol, provides remote terminal service platform monitoring analysis software, realizes analysis and inverse analysis, chart display and report formation of site data, and realizes the functions of monitoring the electric quantity of each inclined monitoring point device on the site, alarming (including that the measured data deviates from a set limit, a certain site monitoring point device needs to be charged and the like), appointing a working mode (including the measured depth and the measured time needed by each inclined monitoring point on the site), recording original data and the like of the remote terminal service platform on the site.
In accordance with one or more embodiments, as shown in FIG. 2. An inclinometer assembly circuit is used for a soil displacement monitoring system. The circuit comprises a second microprocessor, a tilt angle sensor, a second short-distance communication module, a photoelectric position detection sensor and a power circuit. The second short-range communication module may employ a bluetooth module, and the bluetooth module is integrated on the second microprocessor.
The inclination angle sensor is connected with the second microprocessor, can be packaged by an MEMS and is used for detecting the inclination angle of the inclinometer. And the second short-distance communication module is connected with the second microprocessor and is used for transmitting inclination data of the inclinometer to the main controller in batches.
And the photoelectric position detection sensor is connected with the second microprocessor through the comparator and is used for positioning the initial zero angle of the tilt angle sensor.
The inclinometer assembly circuit further comprises a second stepping motor, and the second stepping motor is connected to the second microprocessor through a second stepping motor controller and used for driving the inclination angle sensor to rotate along the circular section of the inclinometer pipe.
The power supply circuit of the inclinometer assembly circuit comprises a wireless charging receiving unit, a second battery pack, a second charging management unit and a second direct-current power supply conversion unit. The electric energy obtained by the wireless charging receiving unit is accessed into the second battery pack through the second charging management unit and then is accessed into a power circuit of the inclinometer assembly circuit comprising the second microprocessor through the voltage conversion of the second direct current power supply conversion unit.
According to one or more embodiments, the inclinometer assembly circuit comprises functional circuits such as a wireless charging receiving coil and a charging circuit thereof, a three-dimensional high-precision MENMS inclination angle sensor and a signal conditioning circuit thereof, a microprocessor with a Bluetooth receiving and transmitting function, a stepping motor and a control circuit thereof, a direct current conversion and direct current power supply circuit, a 26650 lithium battery, an optical initial angle positioning circuit and the like. The wireless charging receiving coil and the charging circuit thereof are used for inducing electromagnetic energy sent by the wireless charging transmitting module in the main controller to charge a 26650 lithium battery in the inclinometer assembly; the direct current conversion and direct current power supply circuit is used for converting 3-4.2V direct current electric energy provided by the 26650 lithium battery into a working power supply required by a corresponding unit of the intelligent inclinometer subsystem; the direct current power supply circuit is used for providing a stable direct current power supply for the related circuit of the inclinometer assembly; the microprocessor with the Bluetooth transceiving function is also used for realizing wireless data interaction with the main controller; the three-dimensional high-precision MENMS tilt angle sensor and the signal conditioning circuit thereof are used for detecting the tilt angle change of an X, Y axis relative to a gravity axis and implementing 20-bit precision A/D conversion on a tilt angle measurement value, and the three-dimensional high-precision MENMS tilt angle sensor is also integrated with a temperature sensor for detecting layered temperature information; the optical initial angle positioning circuit is used for determining the zero angle of the MEMS inclination angle sensor on the circular section formed by the inclinometer pipe during measurement.
According to one or more embodiments, the complete measurement process of an inclinometer assembly, or what may also be referred to as an inclinometer, is as follows.
The inclinometer realizes information interaction with the main controller in a wireless Bluetooth mode. When the wireless Bluetooth module in the inclinometer receives the 'activation' information sent by the main controller, the microprocessor in the inclinometer is activated. Thereupon, the following process will start to be performed:
1. performing an optical positioning operation, the purpose of which is to zero (reset to a fixed zero angle set on the circular cross section of the inclinometer) the three-dimensional MEMS chip (X, Y axis) for inclination measurement;
2. waiting and receiving the "measured depth" information subsequently sent by the master controller. And after receiving the 'measuring depth' information, the inclinometer automatically calculates the number of measuring steps required by measuring the distance according to 500mm according to the received 'measuring depth' information and stores the number. The inclinometer is positioned at the topmost end (reset position) of the inclinometer tube at the moment. And controlling a stepping motor in the inclinometer to rotate 90 degrees away from the 0-degree position, and sampling the offset inclination angle of the X, Y shaft of the three-dimensional MEMS inclination angle sensor relative to the direction of the vertical gravity shaft when the circular section of the inclinometer is 90 degrees after a slight pause. The stepper motor in the inclinometer is then controlled to rotate 180 degrees away from the 90 degree position. And after a slight pause, sampling the offset inclination angle of the X, Y shaft of the three-dimensional MEMS inclination angle sensor relative to the direction of the vertical gravity shaft when the circular section of the inclinometer is 180 degrees. And repeating the process until the three-dimensional MEMS tilt angle sensor returns to the initial 0-degree position and acquires the offset tilt angle of the X, Y shaft of the three-dimensional MEMS tilt angle sensor relative to the direction of the vertical gravity shaft when the angle is 0 degrees, and enabling the inclinometer to wait for the main controller to send out clock synchronization information.
3. When the inclinometer receives clock synchronization information sent by the main controller, the inclinometer immediately executes the following operations:
1) starting a timing counter to start timing counting;
2) and c1 seconds later, four-quadrant inclination angle data acquisition is carried out and stored. When C seconds are counted, clearing the counting value and timing again (resetting the timing counter), and acquiring and storing the output data of the two-dimensional MEMS inclination angle sensor with the first step length after D + C1 seconds are counted again; and clearing the count value, timing again (resetting the timing counter), and acquiring and storing the output data of the two-dimensional MEMS tilt angle sensor with the second step length after the timing is restarted to D + c1 seconds. And the like in sequence until the last sampling step.
For example, assuming that two-dimensional inclination angle measurement is performed in an inclinometer pipe buried 10 meters deep, and assuming that the initial position of the inclinometer is located at the upper end of the inclinometer pipe penetrating out of the soil body, it can be known that the number N of measurement steps is (2 × 10) -1, and after time synchronization, each measurement step in the other N measurement steps costs C + D seconds except that the two-dimensional inclination angle data sampled at the initial position is specified as C seconds according to a program; the total measurement time overhead T is thereforeCLC + N × (C + D) seconds. After all the measurements are finished, the system is stopped for E seconds, the time for resetting the inclinometer is increased to 10(m)/L (mm)/s, and the inclinometer returns to the original position. Thus, the entire process takes time TTOTAL＝TCL+ F seconds.
For performing optical positioning operations, the purpose of optical positioning is to determine that the micro-electromechanical tilt sensor (MEMS) X-axis points to a fixed initial angular position on the circular cross-section of the inclinometer at each measurement. The three-axis tilt sensor (MEMS) is formed by X, Y axes and is arranged on the MEMS mounting plate, and the X axis of the three-axis tilt sensor (MEMS) points to the direction of a small hole of 0.3 mm formed on the mounting plate. Opposite the aperture, a micro-optic receptor device (LREC) is mounted. An LED infrared emitting diode (LTRANS) is arranged below the MEMS mounting plate along a certain position of the circular section of the inclinometer.
When the inclinometer works, the process of executing optical positioning comprises the following steps:
under the control of a microprocessor (PTR9610), a light emitting diode LTRANS is lightened, and the microprocessor (PTR9610) is combined with a stepping motor control chip (STSPIN220) to control a stepping motor (JF15BYG-018) to drive the MEMS mounting plate to rotate along the circular section of the inclinometer. When an aperture in the MEMS mounting board is aligned with an LED infrared emitting diode (LTRANS), an optical receiver tube (LREC) on the MEMS mounting board receives an infrared signal from the infrared emitting diode that passes through the aperture. Then, receiving a high level of the optical signal output, the microprocessor (PTR9610) controls the stepping motor (JF15BYG-018) to stop rotating in conjunction with the stepping motor control chip (STSPIN 220). Defining the tilt sensor (MEMS) X-axis to point at this time to an initial zero angle on a circular cross-section with respect to the inclinometer, so called optical positioning is accomplished.
The tilt sensor in the inclinometer performs 4-quadrant data sampling along the circumference of the inclinometer for each 500mm step. It is thus possible to obtain a vector increment value at a certain level of the deviational survey for which the deviation about the axis occurs. After the inclination angle measurement of one step length is finished, the temperature value of a built-in temperature sensor of the MEMS sensor is sampled, and all operations under the step length are finished after all sampling data are stored.
Because the inclinometer is mostly immersed in an underwater environment during working, and the measured data cannot be transmitted in a wireless mode in water, the output data of the MEMS inclination sensor (X, Yy axis) is sampled at regular time and stored in the memory, and once the inclinometer returns to the original point (the upper end of the inclinometer is separated from the underwater environment), the collected data stored in the memory are transmitted to the automatic lifting and control subsystem in a data interaction mode in a wireless Bluetooth mode in batches.
It should be noted that while the foregoing has described the spirit and principles of the invention with reference to several specific embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, nor is the division of aspects, which is for convenience only as the features in these aspects cannot be combined. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (5)
1. A method for measuring an inclinometer is used for a soil displacement monitoring system, which comprises,
the inclinometer pipe is buried in a soil body to be monitored;
the inclinometer assembly is arranged in the inclinometer and used for acquiring inclination data of the inclinometer;
the lifting mechanism is used for hanging the inclinometer assembly and controlling the inclinometer assembly to move up and down in the inclinometer pipe;
the main controller is used for controlling the action of the lifting mechanism, simultaneously performing data and instruction interaction with the inclinometer assembly through the communication interface and controlling the measurement process of the inclinometer assembly,
the inclinometer assembly circuit comprises a second microprocessor, an inclination angle sensor, a photoelectric position detection sensor and a second stepping motor controller,
the inclination angle sensor is connected with the second microprocessor, adopts a three-dimensional MEMS chip structure and is used for detecting the inclination angle of the inclinometer pipe;
the second short-distance communication module is used for transmitting inclination data of the inclinometer to the main controller in batches;
the photoelectric position detection sensor is used for positioning the initial zero angle of the tilt sensor;
the second stepping motor controller is connected with the second stepping motor and the second microprocessor and used for driving the inclination angle sensor to rotate along the circular section of the inclinometer pipe;
the measuring method of the inclinometer comprises the following steps:
s101, after receiving an activation instruction sent by a main controller, an inclinometer assembly circuit executes optical positioning operation, wherein the optical positioning operation refers to resetting the inclination angle sensor to an initial zero angle set on the circular section of the inclinometer;
s102, waiting for and receiving information including the measurement depth sent by the main controller, and calculating the number of measurement steps required according to the measurement distance according to the measurement depth;
s103, driving the inclination angle sensor to rotate 90 degrees along the circular section of the inclinometer by a second stepping motor, and sampling an offset inclination angle of the three-dimensional MEMS inclination angle sensor X, Y shaft relative to the direction of the vertical gravity shaft when the circular section of the inclinometer is 90 degrees;
s104, the second stepping motor drives the inclination angle sensor to rotate to 180 degrees away from the 90-degree position, and the X, Y shaft of the three-dimensional MEMS inclination angle sensor is related to the offset inclination angle in the direction vertical to the gravity shaft when the circular section of the inclinometer is sampled to 180 degrees;
s104, in the same way, the second stepping motor sequentially drives the inclination angle sensor of the three-dimensional MEMS inclination angle sensor to move to 70 degrees and 0 degree to the position, and offset inclination angles of the X, Y axis of the three-dimensional MEMS inclination angle sensor relative to the direction of the vertical gravity axis are collected when the angles are 270 degrees and 0 degree;
s105, the inclinometer assembly receives clock synchronization information sent by the main controller, and clock synchronization between the inclinometer assembly and the main controller is completed;
s106, under the control of the main controller, the inclinometer assembly stays after moving a step distance in the inclinometer pipe under the traction of a steel cable of the lifting mechanism, and the data of the inclination angle sensor is acquired at the staying position;
and S107, repeatedly executing the previous step, and returning the inclinometer assembly to the initial position under the traction of the lifting mechanism after the preset step number is finished.
2. The inclinometer measuring method according to claim 1, characterized in that in step S106, a timing counter is started to count in a timing manner, and the rotation duration of the inclination angle sensor, the data acquisition duration of the inclination angle sensor, the movement duration of one step of the inclinometer assembly, and each stay duration of the inclinometer are controlled according to the count value converted by a predetermined time limit.
3. The inclinometer measurement method according to claim 2, characterized in that the optical positioning operation comprises:
the tilt sensor is arranged on the tilt sensor mounting plate, so that the X axis of the tilt sensor points to the direction of the small hole formed in the tilt sensor mounting plate;
a light receiver is arranged on one side of the inclination angle sensor mounting plate, an optical transmitter is arranged on the other side of the inclination angle sensor mounting plate, which is opposite to the light receiver,
and the second stepping motor drives the inclination angle sensor mounting plate to rotate to the time of the light receiving and transmitting device along the circular section of the inclinometer, the small hole on the inclination angle sensor mounting plate is just positioned between the light transmitter and the light receiver, and light rays transmitted by the light transmitter pass through the small hole and are received by the light receiver, so that the X-axis direction of the inclination angle sensor at the moment is defined as an initial zero angle relative to the circular section of the inclinometer, and the optical positioning operation is completed.
4. The inclinometer measurement method according to claim 3, characterized in that the inclinometer acquires the temperature value at a position after moving a step distance inside the inclinometer.
5. The inclinometer measuring method according to claim 1, wherein the inclinometer assembly stores the acquired data in time, and after the inclinometer assembly finishes measuring and returns to the initial position, the acquired data is sent to the main controller through the second short-range communication module.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091711A (en) * | 2021-04-12 | 2021-07-09 | 江阴捷波智能科技有限公司 | Bluetooth-based high-precision tilt angle sensor capable of remotely zeroing |
| CN115046525A (en) * | 2022-08-15 | 2022-09-13 | 上海米度测控科技有限公司 | Movable inclinometer and method for measuring deep horizontal displacement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091711A (en) * | 2021-04-12 | 2021-07-09 | 江阴捷波智能科技有限公司 | Bluetooth-based high-precision tilt angle sensor capable of remotely zeroing |
| CN115046525A (en) * | 2022-08-15 | 2022-09-13 | 上海米度测控科技有限公司 | Movable inclinometer and method for measuring deep horizontal displacement |
| CN115046525B (en) * | 2022-08-15 | 2022-11-04 | 上海米度测控科技有限公司 | Movable inclinometer and method for measuring deep horizontal displacement |
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Application publication date: 20201211 |