CN104089571A - Remote calibration device of borehole deformation instrument for borehole ground deformation measurement - Google Patents
Remote calibration device of borehole deformation instrument for borehole ground deformation measurement Download PDFInfo
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- CN104089571A CN104089571A CN201410347886.7A CN201410347886A CN104089571A CN 104089571 A CN104089571 A CN 104089571A CN 201410347886 A CN201410347886 A CN 201410347886A CN 104089571 A CN104089571 A CN 104089571A
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- 238000005259 measurement Methods 0.000 title claims abstract description 25
- 238000006073 displacement reaction Methods 0.000 claims abstract description 91
- 239000000919 ceramic Substances 0.000 claims description 30
- 238000005553 drilling Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 abstract description 4
- 230000033001 locomotion Effects 0.000 description 11
- 239000000523 sample Substances 0.000 description 9
- 230000008859 change Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a remote calibration device of a borehole deformation instrument for borehole ground deformation measurement. The device comprises a micro-displacement device, a calibration device body and a calibration and control device, wherein the micro-displacement device is provided with a movable displacement driving portion which is connected with the measuring polar plate in the middle of a tripolar differential capacitor type micro-displacement sensor of a borehole strainmeter and can measure the measuring polar plate; the calibration device body is arranged on one side of the measuring polar plate of the tripolar differential capacitor type micro-displacement sensor and can detect the displacement variation of the measuring polar plate; the calibration and control device is respectively in communication with the micro-displacement device and the calibration device body and can send the received displacement variation of the measuring polar plate to a remote data processing terminal, wherein the displacement variation is detected by the calibration device body; a displacement control signal sent by the data processing terminal is transmitted to the micro-displacement device, so that the displacement driving portion of the micro-displacement device is controlled to move the measuring polar plate of the tripolar differential capacitor type micro-displacement sensor according to the displacement control signal. The remote calibration device is simple in structure and facilitates remote calibration of the borehole deformation instrument.
Description
Technical Field
The invention relates to the field of calibration and calibration of a borehole strain gauge, in particular to a remote calibration device of a borehole deformation gauge, which can be used for conveniently and linearly calibrating and calibrating in borehole topographic deformation measurement.
Background
In the measurement of the topographic deformation of the drill hole, a measuring probe is generally coupled with the rock in a cement coupling mode, and once the probe is installed in a well, the measuring probe cannot be taken out. In the work of more than ten years, the sensors of the downhole instruments and the electronic measurement system are slightly changed along with the factors of the working environment, the working age and the like. The change of the sensor performance directly influences the quality of the observed data. Therefore, the seismic instrument industry specification requires that the network-accessing downhole instrument has downhole physical static calibration capability, and the downhole instrument can be calibrated periodically to know the working performance of the downhole instrument. The prior borehole topographic variation observation instrument adopts a calibration mechanism with piezoelectric ceramics as a core, can calibrate the instrument grid value, and cannot realize linear calibration and calibration. To realize the calibration of the measurement of the topographic deformation of the drill hole, a calibration device for the measurement of the topographic deformation of the drill hole is required to be installed on a downhole probe, and the current calibration device cannot be installed on the downhole probe in cooperation with a sensor due to large volume, and is difficult to be directly applied to the measurement of the topographic deformation of the drill hole due to inconsistent driving control protocols, so that the remote calibration is realized.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a remote calibration device of a borehole deformation instrument for borehole ground deformation measurement, which can be conveniently installed on an underground probe in a manner of being matched with a sensor of the borehole strain instrument, and can be conveniently matched with a remote data processing terminal to realize remote linear calibration and calibration, so that the problems that the existing borehole strain instrument for borehole terrain deformation measurement can only realize underground static calibration and is difficult to realize convenient remote linear calibration and calibration are solved.
In order to solve the above technical problem, the present invention provides a remote calibration device for a borehole deformation meter for borehole deformation measurement, comprising:
the micro-displacement device is provided with a movable displacement driving part, and the displacement driving part is connected with a measuring polar plate in the middle of a three-pole differential capacitance type micro-displacement sensor of the drilling strain gauge and can move the measuring polar plate;
the calibration device is arranged on one side of a measuring polar plate of the three-pole differential capacitance type micro-displacement sensor and can detect the displacement variation of the measuring polar plate;
the calibration control device is respectively in communication connection with the micro-displacement device and the calibration device and can send the received displacement variation of the measuring polar plate detected by the calibration device to a remote data processing terminal; and transmitting the displacement control signal sent by the data processing terminal to the micro displacement device so as to control a displacement driving part of the micro displacement device to move a measuring polar plate of the three-pole differential capacitance type micro displacement sensor according to the displacement control signal.
The invention has the beneficial effects that: through the measuring polar plate micro-displacement device in the middle of the tripolar differential capacitance type micro-displacement sensor capable of moving the drilling strain gauge and the calibration device capable of detecting the displacement variation of the measuring polar plate, the working state and the performance of the tripolar differential capacitance type micro-displacement sensor of the drilling strain gauge can be fully known, scientific basic guarantee is provided for observation data, the underground static calibration level of the existing drilling strain gauge is realized, and the underground linear calibration and calibration level are improved. The device has the advantages of small volume, high precision and convenience for remote control by a remote data processing terminal.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic diagram of a borehole strain gauge sensor mounting structure provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of a remote calibration device mounted to a borehole strain gauge according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a micro-displacement device of a remote control device according to an embodiment of the present invention;
fig. 4 is a side view of a micro-displacement device of a remote calibration device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 2 shows a remote calibration device for a borehole deformation meter for borehole topographic deformation measurement according to an embodiment of the present invention, which is mainly used for calibrating a three-pole differential capacitive micro-displacement sensor of the borehole deformation meter, and includes:
a micro-displacement device 5, which is provided with a movable displacement driving part 51, wherein the displacement driving part 51 is connected with a measuring pole plate 42 of a three-pole differential capacitance type micro-displacement sensor 4 (the three-pole differential capacitance type micro-displacement sensor is shown in figure 1) of the drilling strain gauge, and can move the measuring pole plate 42;
the calibration device 6 is arranged on one side of the measuring pole plate 42 of the three-pole differential capacitance type micro-displacement sensor 4 and can detect the displacement variation of the measuring pole plate 42;
the calibration control device 7 is respectively in communication connection with the micro-displacement device 5 and the calibration device 6 and can send the received displacement variation of the measuring pole plate 42 detected by the calibration device 6 to the remote data processing terminal 8; and transmitting the displacement control signal sent by the data processing terminal 8 to the micro displacement device 5 so as to control the displacement driving part 51 of the micro displacement device 5 to move the measuring plate 52 of the three-pole differential capacitance type micro displacement sensor 4 according to the displacement control signal.
In the remote calibration device, the micro-displacement device 5 is arranged at one end of the transmission rods 2 and 3 of the drilling hole deformation instrument.
In the above remote calibration device, the structure of the micro displacement device 5 is shown in fig. 3 and 4, and includes: the device comprises a platform 52, a ceramic motor 5, a ceramic kinematic pair 511 (the ceramic kinematic pair is a kinematic pair made of wear-resistant ceramics), a sliding block 513 and a guide rail 512; the components are all disposed on a platform 52; the slide block is arranged on the guide rail and is used as a displacement driving part 511 of the micro displacement device, and the slide block 513 can move linearly along the guide rail 512; the power output end of the ceramic motor 5 is connected with the sliding block 513 through the ceramic kinematic pair 52, the sliding block 513 can be driven to linearly displace along the guide rail 512, and the measuring pole plate 42 is fixedly connected with the sliding block 513. The micro-displacement mechanism adopts the ceramic motor to directly obtain linear motion through the connected ceramic motion pair, and avoids the need of converting rotary motion into linear motion by adopting the traditional stepping motor. Therefore, the parts and the size of the mechanism are reduced, and the mechanism is feasible to install in a narrow space. And a precise slide block is matched to enable the measuring polar plate 42 to precisely move in a certain space. The range of the movement is not affected by precision, and is limited by the length of the ceramic kinematic pair 52. The problem that the precision and the measuring range are mutually contradictory is well solved. Of course, the final precision can be achieved by establishing a closed-loop control system of the ceramic motor by using grating measurement data with a resolution of 5nm as a feedback signal of the measurement pole plate 42, so that the precision of 1um is realized, and the linearity is preferably less than 1%.
In the micro displacement device 5, the connection between the power output end of the ceramic motor 5 and the sliding block 513 through the ceramic kinematic pair 52 specifically includes: the ceramic kinematic pair 52 is composed of a ceramic contact foot capable of doing elliptic motion and a ceramic strip capable of doing linear motion, the ceramic contact foot and the ceramic strip are in mutual contact and can generate relative motion, the piezoelectric response of the ceramic motor enables the ceramic small contact foot to do elliptic motion, the ceramic small contact foot is in direct contact with the ceramic strip, due to the action of friction force, the ceramic strip makes linear motion, and the ceramic strip is connected with the sliding block to drive the sliding block to do linear motion.
In the remote calibration device, the calibration device 6 adopts a grating calibration device with the resolution not greater than 5 nm. The grating calibration device can ensure the accuracy of measuring displacement. In practice, a grating calibration device as the calibration device 6 may be mounted on the side of the slide 513 on which the measurement plate 42 is mounted.
In the above remote calibration device, the calibration control device 7 includes: a single chip controller 71, a motor driver 72 and a field bus module (not shown in the figure); wherein,
the serial port of the single chip microcomputer controller 71 is electrically connected with the field bus module, one end of the motor driver 72 is connected with the IO port of the single chip microcomputer controller, and the other end of the motor driver 72 is electrically connected with the control end of the micro-displacement device 5.
The calibration device according to the present invention will be further described with reference to the following specific embodiments.
As shown in fig. 1 and fig. 2, the remote calibration device applied to the borehole strain gauge is mainly used for calibrating a three-pole differential capacitive micro-displacement sensor 4, and includes a calibration control device 7, a micro-displacement device 5 with a ceramic motor as a core, and a calibration device 6 with a grating as a core.
As shown in fig. 1, the borehole strain gauge employs a three-pole differential capacitive micro-displacement sensor 4, three parallel plates 41, 42, 43 of which form two differentially variable capacitors, the middle plate being a measurement plate 42. As shown in figure 1, a three-pole differential capacitance type micro-displacement sensor 4 is arranged on the probe wall 1 of an elastic steel cylinder through transmission rods 2 and 3 and is coupled with the ground through special cement. With the deformation of the probe under the action of the ground stress, the distances d1, d2 between the two side plates 41, 43 and the middle measuring plate 42 of the three-pole differential capacitance type micro-displacement sensor 4 change correspondingly, the capacitance changes accordingly, and the ground deformation can be monitored by measuring the capacitance according to the pre-established relation between the deformation and the differential change of the capacitance.
As shown in fig. 2, the remote calibration device 7 uses the three-pole differential capacitive micro-displacement sensor 4 of the borehole strain gauge as a detection calibration object, the micro-displacement device 5 with a ceramic motor as a core is installed in cooperation with the three-pole differential capacitive micro-displacement sensor, the measurement electrode plate 42 (i.e., the capacitive electrode plate 2) of the three-pole differential capacitive micro-displacement sensor 4 is installed on the micro-displacement device 5, specifically, the displacement driving part 51 of the micro-displacement device 5, and the calibration control device 7 (in fig. 2, 71 is a single chip microcomputer controller, and 72 is a motor controller) is calibrated to receive the signal of the remote data processing terminal 8, so that the measurement electrode plate 42 (i.e., the capacitive electrode plate 2) of the three-pole differential capacitive micro-displacement sensor 4 generates linear micro-displacement, thereby realizing the changes of the distances d1 and d2 between the two side electrode plates 41 and 43 and the middle measurement electrode plate 42, and recording the change data of the output capacitance of the And the calibration device 6 taking the grating as the core obtains the micro-displacement change data of the measuring polar plate 42 (namely the capacitance polar plate 2), so as to realize the remote linear calibration and calibration of the borehole strain gauge.
Meanwhile, the remote calibration device has the characteristics of high precision (1um), excellent linearity (less than 1 percent), small volume and capability of realizing the installation and use in the probe.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. A remote calibration device for a borehole deformer for borehole topographic measurement, comprising:
the micro-displacement device is provided with a movable displacement driving part, and the displacement driving part is connected with a measuring polar plate in the middle of a three-pole differential capacitance type micro-displacement sensor of the drilling strain gauge and can move the measuring polar plate;
the calibration device is arranged on one side of the measuring polar plate of the three-pole differential capacitance type micro-displacement sensor and can detect the displacement variation of the measuring polar plate;
the calibration control device is respectively in communication connection with the micro-displacement device and the calibration device and can send the received displacement variation of the measuring polar plate detected by the calibration device to a remote data processing terminal; and transmitting the displacement control signal sent by the data processing terminal to the micro displacement device so as to control a displacement driving part of the micro displacement device to move a measuring polar plate of the three-pole differential capacitance type micro displacement sensor according to the displacement control signal.
2. A remote calibration device for a borehole deformer for borehole topographic measurement according to claim 1, wherein said micro displacement device is provided at one end of a transmission rod of said borehole deformer.
3. A remote calibration device of a borehole deformation tool for borehole topographic measurement according to claim 1 or 2, wherein the micro-displacement device comprises: the device comprises a platform, a ceramic motor, a ceramic kinematic pair, a sliding block and a guide rail;
all the parts are arranged on the platform;
the sliding block is arranged on the guide rail and can move linearly along the guide rail;
the power output end of the ceramic motor is connected with the sliding block through the ceramic kinematic pair and can drive the sliding block to linearly move along the guide rail.
4. A remote calibration device for a borehole deformer for borehole topographic measurement according to claim 1, wherein said calibration device employs a grating calibration device with a resolution of no more than 5 nm.
5. A remote calibration device for a borehole deformer for borehole topographic measurement according to claim 1, wherein said calibration control means comprises:
the system comprises a single chip microcomputer controller, a motor driver and a field bus module; wherein,
the serial port of the single chip microcomputer controller is electrically connected with the field bus module, one end of the motor driver is connected with the IO port of the single chip microcomputer controller, and the other end of the motor driver is electrically connected with the control end of the micro-displacement device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410347886.7A CN104089571B (en) | 2014-07-21 | 2014-07-21 | Remote calibration device of borehole deformation instrument for borehole ground deformation measurement |
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| CN201410347886.7A CN104089571B (en) | 2014-07-21 | 2014-07-21 | Remote calibration device of borehole deformation instrument for borehole ground deformation measurement |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679631A (en) * | 2017-02-22 | 2017-05-17 | 中国地震局地壳应力研究所 | Remote direction adjusting device of borehole inclinometer for measuring borehole crustal inclination |
| CN106840019A (en) * | 2017-03-13 | 2017-06-13 | 中国地震局地壳应力研究所 | A kind of drilling strain gauge sensitivity test system |
| CN107218884A (en) * | 2017-07-14 | 2017-09-29 | 武汉地震科学仪器研究院有限公司 | A kind of drilling strain gauge overall performance test device and method of testing |
| CN107388955A (en) * | 2017-08-18 | 2017-11-24 | 武汉地震科学仪器研究院有限公司 | A kind of Four component seismic technology probe |
| CN110657755A (en) * | 2019-09-30 | 2020-01-07 | 上海交通大学 | Speckle interference deformation measurement system calibration method and loading device |
| CN111721189A (en) * | 2019-03-18 | 2020-09-29 | 赵国强 | Detecting head, measuring device, detecting device and monitoring system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679631A (en) * | 2017-02-22 | 2017-05-17 | 中国地震局地壳应力研究所 | Remote direction adjusting device of borehole inclinometer for measuring borehole crustal inclination |
| CN106840019A (en) * | 2017-03-13 | 2017-06-13 | 中国地震局地壳应力研究所 | A kind of drilling strain gauge sensitivity test system |
| CN106840019B (en) * | 2017-03-13 | 2024-01-12 | 应急管理部国家自然灾害防治研究院 | Sensitivity test system for borehole strain gauge |
| CN107218884A (en) * | 2017-07-14 | 2017-09-29 | 武汉地震科学仪器研究院有限公司 | A kind of drilling strain gauge overall performance test device and method of testing |
| CN107218884B (en) * | 2017-07-14 | 2023-12-05 | 武汉地震科学仪器研究院有限公司 | Drilling strain gauge complete machine performance testing device and testing method |
| CN107388955A (en) * | 2017-08-18 | 2017-11-24 | 武汉地震科学仪器研究院有限公司 | A kind of Four component seismic technology probe |
| CN111721189A (en) * | 2019-03-18 | 2020-09-29 | 赵国强 | Detecting head, measuring device, detecting device and monitoring system |
| CN110657755A (en) * | 2019-09-30 | 2020-01-07 | 上海交通大学 | Speckle interference deformation measurement system calibration method and loading device |
| CN110657755B (en) * | 2019-09-30 | 2021-06-29 | 上海交通大学 | Speckle interference deformation measurement system calibration method and loading device |
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| CN104089571B (en) | 2017-02-01 |
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Address after: 100085, Anning Road, Haidian District, Beijing, 1, Xisanqi Patentee after: National natural disaster prevention and Control Research Institute, Ministry of emergency management Address before: 100085, Anning Road, Haidian District, Beijing, 1, Xisanqi Patentee before: THE INSTITUTE OF CRUSTAL DYNAMICS, CHINA EARTHQUAKE ADMINISTRATION |