CN111693022A - Settlement monitoring system error compensation method based on differential pressure type settlement meter - Google Patents
Settlement monitoring system error compensation method based on differential pressure type settlement meter Download PDFInfo
- Publication number
- CN111693022A CN111693022A CN202010581925.5A CN202010581925A CN111693022A CN 111693022 A CN111693022 A CN 111693022A CN 202010581925 A CN202010581925 A CN 202010581925A CN 111693022 A CN111693022 A CN 111693022A
- Authority
- CN
- China
- Prior art keywords
- pressure
- temperature
- settlement
- differential pressure
- meter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
- G01C5/04—Hydrostatic levelling, i.e. by flexibly interconnected liquid containers at separated points
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Manufacturing & Machinery (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a settlement monitoring system error compensation method based on a differential pressure type settlement meter, which comprises the following steps: s1, calibrating a differential pressure type settlement meter to obtain calibration data; s2, fitting the calibration data and forming a pressure and temperature compensation table; s3, arranging a temperature measuring device on a liquid pipeline communicated with the differential pressure type settlement meter and measuring to obtain the temperature T of the liquid in the pipeline; s4, performing temperature compensation on the pressure measured by the differential pressure settlement meter at the temperature T according to the pressure and temperature compensation meter to obtain compensated pressure; and S5, calculating the settlement value of the monitoring point. The settlement monitoring system error compensation method based on the differential pressure type settlement meter can simply and effectively reduce the system error and ensure that the measurement result is accurate and reliable.
Description
Technical Field
The invention relates to the field of errors, in particular to a settlement monitoring system error compensation method based on a differential pressure settlement meter.
Background
The structural settlement monitoring of structures such as bridge, tunnel, high-speed railway, utility tunnel at present adopts the hydrostatic level system based on communicating pipe principle to realize basically, and its principle is changed to the altitude variation for detecting the pressure difference of monitoring point and datum point through differential settlement appearance and is realized, and wherein, the height that influences system detection precision mainly includes whether have the bubble etc. in sensor self precision, the temperature variation, the liquid way. Pressure detection is realized to the most adoption monocrystalline silicon or diffusion silicon sensing element of differential pressure type settlement appearance, but its detection error receives the temperature influence great, and behind the installation hydrostatic level system, because the temperature variation in different detection area makes liquid density change in the system, leads to the detection precision of system to be less than the detection precision of settlement appearance self far away for the error of hydrostatic level system is than great, can not accurately reflect the actual settlement change condition of monitoring the risk source.
Therefore, in order to solve the above problems, there is a need for an error compensation method for a settlement monitoring system based on a differential pressure settlement meter, which can simply and effectively reduce the system error and make the measurement result accurate and reliable.
Disclosure of Invention
In view of the above, the present invention is to overcome the defects in the prior art, and provide an error compensation method for a settlement monitoring system based on a differential pressure settlement meter, which can simply and effectively reduce the system error, so that the measurement result is accurate and reliable.
The invention relates to a settlement monitoring system error compensation method based on a differential pressure type settlement meter, which comprises the following steps:
s1, calibrating a differential pressure type settlement meter to obtain calibration data; the calibration data includes temperature and pressure under temperature conditions;
s2, fitting the calibration data to form a pressure and temperature compensation table and storing the table;
s3, taking a geological stable point in a monitoring area or near the monitoring area as a reference point, arranging a temperature measuring device on a liquid pipeline communicated with the differential pressure settlement meter, and measuring to obtain a liquid temperature T;
s4, performing temperature compensation on the pressure P measured by the differential pressure type settlement meter at the liquid temperature T according to the pressure and temperature compensation meter to obtain compensated pressure P';
s5, calculating a settlement value delta h of the monitoring point nn；
The above-mentioned
Wherein, h'nThe height of a monitoring point n at the moment of measurement; h isnThe height of a monitoring point n at the initial moment; h'1The height of a reference point at the moment of measurement; h is1Is the height of the reference point at the initial moment; p'nThe compensated pressure of the monitoring point n at the measuring moment is measured; pnThe pressure of a monitoring point n at the initial moment; p'1Compensated pressure for a reference point at the measurement time; p1Pressure as a reference point of the initial moment; rhoTMeasuring the density of the liquid in the liquid pipeline at the moment temperature T; density of liquid in the liquid pipeline at the rho initial time; g is the acceleration of gravity; and n is the number of the monitoring point.
Further, step S1, calibrating the differential pressure type settlement meter specifically includes:
s11, obtaining the pressure range of 0-P of the differential pressure type settlement metermaxAnd the operating temperature range Tmin～Tmax；
S12, measuring the pressure range from 0 to PmaxEqually dividing the pressure into m pressure sections and setting the working temperature range Tmin～TmaxEqually dividing the temperature into n temperature intervals;
s13, carrying out pressure calibration on the m pressure intervals in the n temperature intervals.
Further, in step S3, the liquid in the liquid pipeline is ethylene glycol.
The invention has the beneficial effects that: the invention discloses a settlement monitoring system error compensation method based on a differential pressure settlement meter, which is characterized in that a pressure and temperature compensation meter of the differential pressure settlement meter is obtained by calibrating the differential pressure settlement meter, and the temperature compensation is carried out on the differential pressure settlement meter according to the compensation meter during actual measurement, so that the measurement accuracy of the differential pressure settlement meter is improved, and the calculated settlement value is more accurate.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a schematic flow diagram of the process of the present invention;
FIG. 2 is a schematic diagram of the arrangement of the differential pressure type settlement gauge in the monitoring field according to the present invention;
wherein A1, A2 and AN are all differential pressure type settlers.
Detailed Description
The invention is further described with reference to the accompanying drawings, in which:
the invention relates to a settlement monitoring system error compensation method based on a differential pressure type settlement meter, which comprises the following steps:
s1, calibrating a differential pressure type settlement meter to obtain calibration data; the calibration data includes temperature and pressure under temperature conditions; in this embodiment, the temperature is a working temperature of the differential pressure type settlement gauge, and the pressure is a pressure within a working range of the differential pressure type settlement gauge;
s2, fitting the calibration data to form a pressure and temperature compensation table and storing the table; in this embodiment, the temperature has a plurality of values, wherein one temperature value corresponds to a plurality of pressure values; the differential pressure type settlement meter stores the pressure and temperature compensation meter in an internal storage chip;
s3, taking the geological stability point in the monitoring area or near the monitoring area as a reference point, and setting the reference point is beneficial to eliminating the whole error caused by the air pressure change in the liquid pipeline when calculating the settlement value of the monitoring point; arranging a temperature measuring device on a liquid pipeline communicated with the differential pressure type settlement meter and measuring to obtain a liquid temperature T; in this embodiment, the liquid pipeline delivery outlet at the differential pressure type of the extreme subsides appearance sets up a container, fill in the container with liquid, the inside temperature measuring device that is provided with of container, temperature measuring device is temperature sensor, temperature sensor can the temperature of the whole liquid pipeline internal liquid of real-time supervision. Wherein, the container is the prior art, and is not described herein again.
S4, according to pressureThe force and temperature compensation meter is used for carrying out temperature compensation on the pressure P measured by the differential pressure type settlement meter at the liquid temperature T to obtain compensated pressure P'; in this embodiment, the sedimentation monitoring system first reads the pressure and temperature compensation table stored in the memory chip of the differential pressure sedimentation instrument, and then compares the pressure P measured by the differential pressure sedimentation instrument at the liquid temperature T with the pressure P corresponding to the temperature T in the pressure and temperature compensation tablesComparing the pressure P with the pressure PsIf the difference is within the allowable error range, the measured pressure P is used as the compensated pressure, otherwise, the pressure P is used as the compensated pressuresAs a compensated pressure. The settlement monitoring system is used for monitoring the settlement condition of a target object in actual production.
S5, calculating a settlement value delta h of a monitoring point n in the settlement monitoring systemn；
The above-mentioned
Wherein, h'nFor measuring the height of the monitoring point n at the time, said
hnThe height of point n is monitored at the initial moment, said
h'1For measuring the height of the reference point at the moment of time, said
h1Is the height of the reference point at the initial moment, said
P'nThe compensated pressure of the monitoring point n at the measuring moment is measured; pnThe initial pressure of a monitoring point n at the initial moment; p'1Compensated pressure for a reference point at the measurement time; p1An initial pressure that is a reference point at an initial time; rhoTFor measuring the density of the liquid in the liquid line at the time temperature TIn the embodiment, the sedimentation monitoring system searches a linear table of the temperature and density change of the liquid according to the temperature value T of the temperature sensor at the measuring moment to obtain the density rho of the liquidT(ii) a Initial density of liquid in the liquid pipeline at the rho initial time; g is the acceleration of gravity; and n is the number of the monitoring point. In this embodiment, a reference point is set on a monitoring site according to a point distribution principle, a plurality of monitoring points are set according to actual conditions of the site, a settlement gauge is correspondingly arranged on each of the reference point and the monitoring points, and the initial pressure or the compensated pressure of the reference point or the monitoring point is represented as the initial pressure or the compensated pressure of the settlement gauge. And the height difference between the pressure differential settlement instrument at the highest point and the pressure differential settlement instrument at the lowest point does not exceed the range of the pressure differential settlement instruments.
In this embodiment, step S1, before leaving the factory, uses the high accuracy pressure controller with error within 0.5 ‰tocarry out the linear calibration of temperature-dependent region pressure to differential pressure settlement appearance at first, specifically includes:
s11, the differential pressure type settlement meter monitors settlement by adopting a pressure change measurement principle, the settlement measurement range is 0-4000 mm, the corresponding pressure range is 0-40 Kpa, and the working temperature range of the differential pressure type settlement meter is-20-50 ℃.
S12, dividing the pressure range of the differential pressure type settlement instrument into 8 intervals according to a pressure interval of 5 Kpa: [0Kpa,5Kpa ], [5Kpa, 10Kpa ], [10Kpa,15Kpa ], [15Kpa,20Kpa ], [20Kpa,25Kpa ],
[25Kpa,30Kpa ], [30Kpa,35Kpa ], [35Kpa, 40Kpa ], the 8 intervals correspond to a total of 9 pressure calibration points: 0Kpa,5Kpa, 10Kpa,15Kpa,20 Kpa,25Kpa,30 Kpa,35Kpa, 40 Kpa;
the working temperature range of the differential pressure type settlement meter is divided into 7 temperature intervals according to a temperature interval of 10 degrees centigrade: [ -20 deg.C, [ -10 deg.C ], [ -10 deg.C, [ -0 deg.C, [0 deg.C, ] 10 deg.C, [10 deg.C, ] 20 deg.C, [20 deg.C, ] 30 deg.C,
[30 ℃,40 ℃), [40 ℃,50 ℃), the 7 intervals correspond to a total of 8 temperature calibration points: -20 ℃ to 10 ℃,0 ℃,10 ℃,20 ℃,30 ℃,40 ℃ to 50 ℃.
S13, connecting the pressure controller with a differential pressure type settlement meter, and putting the pressure controller and the differential pressure type settlement meter into a high-low temperature box; firstly, the high-low temperature box controls to generate the temperature of minus 20 ℃, the temperature acquisition chip is arranged in the differential pressure type settlement instrument, when the internal temperature of the differential pressure type settlement instrument reaches minus 20 ℃, the pressure controller is controlled to respectively generate 9 pressure calibration points in the step S12, the 9 pressure calibration points are calibrated, and then the corresponding 9 pressure calibration data at minus 20 ℃ are obtained. Similarly, 9 pressure calibration data corresponding to-10 deg.C, 0 deg.C, 10 deg.C, 20 deg.C, 30 deg.C, 40 deg.C, 50 deg.C can be obtained. The pressure controller and the high-low temperature box both adopt the prior art, and are not described in detail herein.
In this embodiment, step S3, the liquid that circulates in the liquid pipeline is ethylene glycol, ethylene glycol is effectual to prevent frostbite, is difficult for producing the parasite and causes density variation and can be mutually soluble with liquid such as water.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (3)
1. A settlement monitoring system error compensation method based on a differential pressure type settlement gauge is characterized in that: the method comprises the following steps:
s1, calibrating a differential pressure type settlement meter to obtain calibration data; the calibration data includes temperature and pressure under temperature conditions;
s2, fitting the calibration data to form a pressure and temperature compensation table and storing the table;
s3, taking a geological stable point in a monitoring area or near the monitoring area as a reference point, arranging a temperature measuring device on a liquid pipeline communicated with the differential pressure settlement meter, and measuring to obtain a liquid temperature T;
s4, performing temperature compensation on the pressure P measured by the differential pressure type settlement meter at the liquid temperature T according to the pressure and temperature compensation meter to obtain compensated pressure P';
s5, calculating a settlement value delta h of the monitoring point nn；
The above-mentioned
Wherein, h'nThe height of a monitoring point n at the moment of measurement; h isnThe height of a monitoring point n at the initial moment; h'1The height of a reference point at the moment of measurement; h is1Is the height of the reference point at the initial moment; p'nThe compensated pressure of the monitoring point n at the measuring moment is measured; pnThe pressure of a monitoring point n at the initial moment; p'1Compensated pressure for a reference point at the measurement time; p1Pressure as a reference point of the initial moment; rhoTMeasuring the density of the liquid in the liquid pipeline at the moment temperature T; density of liquid in the liquid pipeline at the rho initial time; g is the acceleration of gravity; and n is the number of the monitoring point.
2. The method of claim 1, wherein the method comprises the steps of: step S1, calibrating the differential pressure type settlement meter, specifically including:
s11, obtaining the pressure range of 0-P of the differential pressure type settlement metermaxAnd the operating temperature range Tmin～Tmax；
S12, measuring the pressure range from 0 to PmaxEqually dividing the pressure into m pressure sections and setting the working temperature range Tmin～TmaxEqually dividing the temperature into n temperature intervals;
s13, carrying out pressure calibration on the m pressure intervals in the n temperature intervals.
3. The method of claim 1, wherein the method comprises the steps of: and step S3, the liquid in the liquid pipeline is glycol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010581925.5A CN111693022A (en) | 2020-06-23 | 2020-06-23 | Settlement monitoring system error compensation method based on differential pressure type settlement meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010581925.5A CN111693022A (en) | 2020-06-23 | 2020-06-23 | Settlement monitoring system error compensation method based on differential pressure type settlement meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111693022A true CN111693022A (en) | 2020-09-22 |
Family
ID=72483428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010581925.5A Pending CN111693022A (en) | 2020-06-23 | 2020-06-23 | Settlement monitoring system error compensation method based on differential pressure type settlement meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111693022A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113932765A (en) * | 2021-10-28 | 2022-01-14 | 中大检测(湖南)股份有限公司 | High-precision static level gauge based on temperature compensation and temperature compensation method thereof |
| CN113959403A (en) * | 2021-10-21 | 2022-01-21 | 上海朝辉压力仪器有限公司 | Temperature compensation method of level gauge |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258847A (en) * | 2015-10-08 | 2016-01-20 | 歌尔声学股份有限公司 | Method and device for calibrating pressure sensor |
| CN205879171U (en) * | 2016-07-22 | 2017-01-11 | 西安华恒仪表制造有限公司 | Static level gauge applied to liquid levels |
| CN107543651A (en) * | 2016-06-24 | 2018-01-05 | 上海北京大学微电子研究院 | A kind of Pressure Transducer Calibration System |
| CN109357612A (en) * | 2018-11-21 | 2019-02-19 | 中国科学院合肥物质科学研究院 | One kind being used for static liquid level capacitance displacement sensor on-line calibration method |
| CN109470407A (en) * | 2018-11-15 | 2019-03-15 | 北京华航无线电测量研究所 | The calibration method of distributed multinode fluid temperature, pressure sensor measurement data |
| CN111289177A (en) * | 2020-02-19 | 2020-06-16 | 北京大成国测科技有限公司 | Pressure sensor range calibration method and pressure sensor with customized range |
-
2020
- 2020-06-23 CN CN202010581925.5A patent/CN111693022A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258847A (en) * | 2015-10-08 | 2016-01-20 | 歌尔声学股份有限公司 | Method and device for calibrating pressure sensor |
| CN107543651A (en) * | 2016-06-24 | 2018-01-05 | 上海北京大学微电子研究院 | A kind of Pressure Transducer Calibration System |
| CN205879171U (en) * | 2016-07-22 | 2017-01-11 | 西安华恒仪表制造有限公司 | Static level gauge applied to liquid levels |
| CN109470407A (en) * | 2018-11-15 | 2019-03-15 | 北京华航无线电测量研究所 | The calibration method of distributed multinode fluid temperature, pressure sensor measurement data |
| CN109357612A (en) * | 2018-11-21 | 2019-02-19 | 中国科学院合肥物质科学研究院 | One kind being used for static liquid level capacitance displacement sensor on-line calibration method |
| CN111289177A (en) * | 2020-02-19 | 2020-06-16 | 北京大成国测科技有限公司 | Pressure sensor range calibration method and pressure sensor with customized range |
Non-Patent Citations (2)
| Title |
|---|
| 张建坤，陈昌彦，白朝旭，徐国双，郑瑶: "影响静力水准监测质量的关键技术问题探讨", 《工程勘察》 * |
| 胡云龙，汪大超: "静力水准系统在沉降监测中的应用", 《城市勘测》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113959403A (en) * | 2021-10-21 | 2022-01-21 | 上海朝辉压力仪器有限公司 | Temperature compensation method of level gauge |
| CN113932765A (en) * | 2021-10-28 | 2022-01-14 | 中大检测(湖南)股份有限公司 | High-precision static level gauge based on temperature compensation and temperature compensation method thereof |
| CN113932765B (en) * | 2021-10-28 | 2023-07-25 | 中大检测(湖南)股份有限公司 | High-precision static level based on temperature compensation and temperature compensation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9638560B2 (en) | Calibration method and flow rate measurement method for flow rate controller for gas supply device | |
| CN111693022A (en) | Settlement monitoring system error compensation method based on differential pressure type settlement meter | |
| US20100180679A1 (en) | All Working Condition Continuously Measuring Liquid Level Meter for a Steam Drum of a Boil and the Liquid Level Computing Method Thereof | |
| CN104976988B (en) | Tunnel large-elevation-difference sedimentation measurement system | |
| CN104020358B (en) | A kind of measure dielectric permittivity and the method for liquid level in LNG gas tank | |
| CN102288256A (en) | Liquid level measurement system of closed container | |
| CN105737796A (en) | Hydraulic leveling measurement system and measurement method thereof | |
| CN103217252A (en) | Movable container type high-precision micro-pressure detection device | |
| CN205262461U (en) | Big depth displacement in tunnel subsides measurement system | |
| CN110006359A (en) | A kind of structure Light deformation real-time monitoring system based on laser range finder | |
| CN108663095A (en) | Liquid level correction and detection method based on the induction of angle position | |
| CN205317300U (en) | Built -in liquid level measurement device | |
| CN202284963U (en) | Liquid level measuring system of sealing container | |
| CN108645377B (en) | Sedimentation monitoring method for comprehensive pipe gallery | |
| CN100473947C (en) | Level-meter | |
| CN111412895A (en) | Static leveling monitoring method for rectification of existing super high-rise building | |
| US10775211B2 (en) | Real-time vessel monitoring system | |
| CN105674946A (en) | Long-span bridge deflection monitoring system | |
| CN212082398U (en) | Calibration and debugging device for static level | |
| KR100946255B1 (en) | Apparatus for measuring water pressure in differential form | |
| CN107063404B (en) | Calibration method of cryogenic liquid level measuring instrument | |
| CN216877874U (en) | Evaporator | |
| CN207763880U (en) | A kind of instrument for calibrating pressure measuring meter peculiar to vessel | |
| CN107416745B (en) | A kind of head tank packaging process | |
| CN220323036U (en) | On-line monitoring device for concentration of fine crystals in AP crystallization system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200922 |