CN106197607A - A kind of device and method of accurate measurement level of ground water - Google Patents
A kind of device and method of accurate measurement level of ground water Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000003673 groundwater Substances 0.000 title claims abstract description 19
- 238000005259 measurement Methods 0.000 title abstract description 7
- 238000012545 processing Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 64
- 239000000523 sample Substances 0.000 claims description 16
- 230000001681 protective effect Effects 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 239000011810 insulating material Substances 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 11
- 239000002689 soil Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
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- 238000001514 detection method Methods 0.000 description 1
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Abstract
The invention provides the device and method of a kind of accurate measurement level of ground water, the depth transducer of this device and Surface electrode are connected with depth transducer signal input part and the Surface electrode signal input part wire of harvester respectively；In 2 wells, electrode is connected with electrode signal input cable in the well of harvester；Harvester includes alarm module and data processing module；Start when alarm module electrode sensor in well contacts with groundwater level and report to the police；Depth transducer monitor in real time with when being put in well under level electrode sensor cable transfer the degree of depth；Data processing module calculates Ground-water level accurately according to electrode collection result.The inventive method is measured by said apparatus.The present invention utilizes in well in 2 wells the resistance between resistance, Surface electrode and WIH potential electrode sensor between electrode to integrate judgement, then substantially increase accuracy.
Description
Technical Field
The invention belongs to the field of geological disaster monitoring and prevention, and relates to a device and a method for accurately measuring underground water level.
Background
In a simple underground water level measuring device and a simple underground water level measuring method (application publication number: CN 105004400A) declared by Liu Yi et al of China geological university (Wuhan), the method is that positive and negative meter pens of a universal meter are fixed on two sides of a heavy block, the negative meter pen of the universal meter is connected with a lead, and the other end of the lead is connected with the universal meter. When the underground water level is measured, the positive and negative meter pens of the universal meter are placed underground through the conducting wires, and the resistance change between the positive and negative meter pens of the universal meter is observed at the same time. When the positive and negative test pens of the multimeter are not contacted with ground and water is drained, the resistance between the positive and negative test pens of the multimeter is infinite, and when the positive and negative test pens of the multimeter are contacted with the ground water, the resistance between the positive and negative test pens of the multimeter is immediately reduced. At this time, the length of the wire put into the well is recorded, and the depth of the underground water level can be obtained.
The measuring method has the following defects in practical application: firstly, because the weight block is thin, when the steep dip angle crack of the drill hole develops, the weight block is easy to be clamped at the crack; secondly, when water flowing out of cracks at a certain depth of the drill hole is encountered, the universal meter pointer deflects, so that misjudgment is caused; thirdly, when the deep well is tested, the weight is easy to shake in the lowering process, so that the resistance changes after the positive and negative test pens of the multimeter are stained with clay, and misjudgment is caused; fourthly, the test data cannot be stored, and technicians cannot perform subsequent rechecking and correction on the accuracy of the test result; fifthly, the testing process is judged according to experience of testing personnel, and the precision is not high.
Disclosure of Invention
The invention aims to provide a device and a method for accurately measuring underground water level, and aims to solve the problem that the existing underground water level measurement result is inaccurate.
The invention is realized in this way, a kind of apparatus to measure the ground water level accurately, the apparatus includes collector, 2 electrodes in the well, depth sensor, surface electrode and cable;
the depth sensor and the earth surface electrode are respectively connected with a depth sensor signal input end and an earth surface electrode signal input end of the collector through wires; the in-well electrode sensor is connected with an in-well electrode signal input end of the collector through a cable; the collector comprises an alarm module and a data processing module; wherein,
the alarm module is used for starting alarm when the electrode sensor in the well is contacted with the underground water surface;
the depth sensor is used for monitoring the lowering depth of the cable when the electrode sensor along with the water level is placed in the well in real time;
the data processing module is used for collecting the resistance among the electrodes in the 2 wells, the resistance among the surface electrode and each well electrode and the lowering depth of the cable, and calculating the accurate underground water level depth according to the collection result.
Preferably, the device further comprises a tripod; wherein, the depth sensor is fixed at the top end of the tripod, and the cable is wound on the roller of the tripod.
Preferably, the device also comprises a protective cover made of insulating materials, and water permeable holes are uniformly distributed on the surface of the protective cover; wherein, be fixed with in the safety cover 2 electrodes in the well.
Preferably, the collector further comprises a recording module and a storage module which are arranged inside, and the recording module and the storage module are both connected with the data processing module; the recording module is used for recording the measuring process of each sensor, and the storage module is used for storing the measuring data of each sensor and the calculation result of the data processing module.
Preferably, the depth sensor is provided with a zero adjustment module; and the zero adjusting module is used for zeroing the depth data acquired by the depth sensor.
Preferably, the alarm module is one or a combination of an acoustic alarm and a light alarm; wherein the alarm is set to alarm when the resistance between the electrodes in the 2 wells and the resistance between the surface electrode and each water level electrode sensor are simultaneously lower than a preset value.
A method for accurately measuring a ground water level by the above apparatus for accurately measuring a ground water level, comprising the steps of:
s1, placing the depth sensor at the wellhead, and inserting the surface electrode into the subsurface beside the wellhead;
s2, connecting 2 electrodes in the well with cables and then putting the electrodes in the well into the well, and zeroing the depth sensor when the bottom end of the electrode in the well is positioned at a well mouth;
s3, starting a collector, slowly lowering the probes of the 2 electrodes in the well into the well, and observing the data acquisition condition and the alarm condition;
and S4, collecting the resistance among the 2 electrodes in the well, the resistance among the earth surface electrode and the 2 electrodes in the well and the reading of the depth sensor through a collector to accurately calculate the depth of the underground water level.
Preferably, the step S1 further includes: installing a tripod on a wellhead, and placing a depth sensor on the tripod;
in step S2, the cable is wound around a tripod wheel.
The invention provides a device and a method for accurately measuring underground water level. In the invention, when the probes of 2 electrodes in the well are not contacted with water, the resistances between the 2 electrodes and between the earth surface electrode and the electrode in the well are very high, generally reaching thousands of omega, even higher; if the probes of the 2 electrodes in the well are in contact with water, the resistances between the 2 electrodes and between the surface electrode and the electrode in the well are very large, generally about 100 omega, and even lower, and whether the probes enter the water is judged through the change of the numerical value or the inflection point of the curve. The measuring electrodes are additionally arranged on the ground, the resistance of the measuring electrodes is very low after the electrodes in 2 wells are short-circuited by objects such as soil, metal and the like in a probe when the electrodes do not enter water, and if the electrodes are judged by the resistance of the electrodes in 2 wells, misjudgment is easy; even if the electrodes in the probes of the 2 electrodes in the well are short-circuited by objects such as soil, metal and the like, the resistance of the electrodes (1 or 2 electrodes) in the 2 electrodes in the well and the earth surface electrode is measured by increasing, and the resistance of the electrodes in the 2 electrodes in the well is obviously reduced only after the electrodes in the 2 electrodes enter water, so that the accuracy and the reliability of the water level test are ensured.
Compared with the defects and shortcomings of the prior art, the invention has the following beneficial effects:
(1) the invention utilizes the resistance among 2 electrodes in the well and the resistance among the earth surface electrode and the water level electrode sensor in the well to comprehensively judge, thereby greatly improving the accuracy.
(2) According to the invention, the protective cover is additionally arranged outside the 2 electrodes in the well, so that the two electrodes are effectively prevented from being short-circuited due to crack water or mud on the hole wall of the drilled hole.
(3) The invention uses the depth sensor to record the depth of the probe, and the probe can be zeroed at any position so as to be convenient for fine adjustment.
(4) The collector can store parameters such as the depth of the electrodes in 2 wells, the resistance of the surface electrode and the electrodes in 2 wells, and the like, is convenient for indoor technicians to check the water level, and greatly ensures the accuracy of water level judgment.
(5) The cable and the electrode are subjected to waterproof treatment, the main body material is rubber or other insulating materials, and the joint of the cable is subjected to sealing treatment to prevent water from permeating into the insulating layer.
(6) The collector is provided with an acoustic alarm system, when the resistance between the electrodes in 2 wells and the resistance of the surface electrode and the water level electrode sensor in the well are simultaneously smaller than a certain set value (such as 100 omega), the acoustic alarm is started to remind a tester to notice that the probe is close to the water level, and the tester is requested to manually judge the accurate position.
Drawings
FIG. 1 is a schematic view showing the construction of an apparatus for precisely measuring the groundwater level according to the present invention in an operating state;
fig. 2 is a schematic structural diagram of a collector in the device of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
FIG. 1 is a schematic view showing the construction of an apparatus for precisely measuring the groundwater level according to the present invention in an operating state; fig. 2 is a schematic structural diagram of a collector in the device of the present invention.
A device for accurately measuring underground water level comprises a collector 1, 2 electrodes 2 in wells, a depth sensor 3, an earth surface electrode 4 and a cable 5;
as shown in fig. 2, the surface of the collector 1 is provided with a pair of well electrode signal input ends 1-1, a ground surface electrode signal input end 1-2 and a depth sensor signal input end 1-3, and the collector 1 is internally provided with an alarm module 1-4 and a data processing module 1-5; the well electrode signal input end 1-1, the earth surface electrode signal input end 1-2, the depth sensor signal input end 1-3 and the alarm module 1-4 are all in electric signal connection with the data processing module 1-5;
the depth sensor 3 and the earth surface electrode 4 are respectively connected with the depth sensor signal input ends 1-3 and the earth surface electrode signal input ends 1-2 of the collector 1 by shielded cables; the 2 electrodes 2 in the well are connected with a signal input end 1-1 of the electrode in the well of the collector 1 through a cable 5; wherein,
the alarm module 1-4 is used for starting alarm when the water level electrode sensor is contacted with the underground water surface;
the depth sensor 3 is used for monitoring the lowering depth of the cable 5 when the electrode sensor along with the water level is placed in the well 8 in real time;
and the data processing modules 1 to 5 are used for acquiring the resistance among the electrodes 2 in the 2 wells, the resistance between the earth surface electrode 4 and each water level electrode sensor 2 and the lowering depth of the cable 5, and calculating the accurate underground water level depth according to the acquisition result.
In the embodiment of the invention, the alarm modules 1-4 are one or a combination of sound alarm and light alarm; wherein the alarm is set to alarm when the resistance between the 2 electrodes 2 in the well and the resistance between the surface electrode 4 and each water level electrode sensor 2 are simultaneously lower than a predetermined value.
The cable 5 and each sensor of the invention adopt waterproof treatment, the main material adopts rubber or other insulating materials, and the joint of the cable 5 is sealed to prevent water from permeating into the insulating layer.
On the basis, the invention provides a method for accurately measuring the underground water level, which comprises the following steps:
s1, placing the depth sensor 3 at the wellhead, and inserting the surface electrode 4 into the subsurface beside the wellhead;
s2, connecting 2 electrodes 2 in the well with cables 5, then putting the electrodes into the well, and zeroing the depth sensor 3 when the bottom end of the electrode 2 in the well is positioned at a well mouth;
s3, starting the collector 1, slowly lowering the probes of the 2 electrodes 2 in the well into the well, and observing the data acquisition condition and the alarm condition;
and S4, collecting the resistance among the 2 electrodes 2 in the well, the resistance among the surface electrode 4 and the 2 electrodes 2 in the well and the reading of the depth sensor 3 through the collector 1, and accurately calculating the depth of the underground water level.
In the practical application process of the invention, 2 electrodes 2 in the well are connected with a cable 5 and then are put into the well 8, the depth sensor 3 is fixed right above the mouth of the well 8, and the surface electrode 4 is inserted into the ground surface beside the mouth of the well 8. When 2 electrodes 2 in the well just dip into 8 water levels of the well, the resistance among the 2 electrodes in the well, the electrodes in the well and the earth surface electrode collected by the collector 1 is smaller than the preset alarm resistance, and the alarm module 1-4 is controlled to start the alarm to remind a tester to notice that the probe is near the water level, and the tester is asked to manually judge the accurate position. And the staff stops lowering the 2 electrodes 2 in the well after obtaining the alarm signal. Meanwhile, the lowering depth of the cable 5 is detected by the depth sensor 3, and the resistance between the cable and each water level electrode sensor 2 is measured by combining the surface electrode 4 to check whether the probe really carries out the underground water.
At this time, the collector 1 reads the resistance between the 2 electrodes 2 in the well, the lowering depth and the resistance between the surface electrode 4 and each water level electrode sensor 2, and obtains the accurate water level depth of the position through the comprehensive analysis of the cable length, the resistance between the 2 electrodes in the well, the change of the resistance between the surface electrode and each water level electrode sensor or the inflection point of the depth-resistance curve.
The invention mainly utilizes the insulator that air is electricity, and the conductor that water and earth are electricity, judges the different values of the resistance between the electrodes in air and water, when measuring, not only measures the resistance between 2 electrodes 2 in the well put under 8, but also measures the resistance between the electrode 4 on the earth's surface and 2 electrodes 2 in the well; if the 2 electrodes 2 in the well meet water or stick to soil in the well 8 in the process of going into the well 8, the collector 1 tests that the resistance value between the 2 electrodes 2 in the well is very low; if only 2 electrodes 2 in the well are short-circuited due to connection of the earth, the resistance between the surface electrode 4 and the 2 electrodes 2 in the well is still infinite, and the resistance between the 2 electrodes 2 in the well 8 and the resistance between the surface electrode 4 and the 2 electrodes 2 in the well 8 are comprehensively utilized for judgment, so that the accuracy is greatly improved.
In addition, the depth sensor 3 is used for recording the depth of the electrodes 2 in 2 wells, the electrodes 2 in 2 wells can zero the current detection depth at any position, the position of the probe can be known at any time through the depth recorded by the collector 1, recalculation can be carried out at any time according to needs, and compared with the method that the depth and the related resistance of the probe are directly measured through a tape measure or a tape measure, the method is more accurate and convenient, and meanwhile, the depth and the related resistance of the probe are all recorded by the collector 1, so that a depth-resistance curve is convenient to generate, and the depth of the underground water level can be comprehensively judged more quickly and accurately.
In a further implementation, for the convenience of operation, in an embodiment of the present invention, the above-mentioned apparatus for accurately measuring the groundwater level further comprises a tripod 6; wherein, the depth sensor 3 is arranged on a tripod 6, and the cable 5 is wound on a roller of the tripod 6.
During measurement, the tripod 6 is erected on the well 8, and the cable 5 connected with the water level electrode sensor 2 bypasses the pulley at the top end of the tripod 6 at the well 8 to place the water level electrode sensor 2 into the well 8.
In the further implementation process, in order to ensure the accuracy of the measured data of the water level electrode sensor 2, in the embodiment of the invention, the device for accurately measuring the underground water level further comprises a protective cover 7, and water permeable holes are uniformly distributed on the surface of the protective cover 7; wherein, 2 electrodes 2 in the well are fixed in the protective cover 7.
In the embodiment of the invention, the protective cover 7 is used for preventing the electrodes 2 in 2 wells from contacting with the wall of the well 8 when shaking to stick soil or falling into cracks on the wall of the well 8 to influence the measurement process and the measurement precision; the protective cover 7 is made of an insulating material with higher strength; the protective cover 7 is internally provided with a groove for fixing the water level electrode sensor 2, so that the distance between the two electrodes is ensured to be constant all the time, and the two electrodes are prevented from being short-circuited.
In a further implementation process, more specifically, in order to facilitate a technician to perform subsequent analysis, the collector 1 further includes a recording module 1-6 and a storage module 1-7, which are disposed inside, and both the recording module 1-6 and the storage module 1-7 are electrically connected to the data processing module 1-5; the recording modules 1-6 are used for recording the measuring process of each sensor; the storage module 1-7 is used for storing the measurement data of each sensor and the calculation result of the data processing module 1-5.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The device for accurately measuring the underground water level is characterized by comprising a collector, 2 electrodes in a well, a depth sensor, an earth surface electrode and a cable;
the depth sensor and the earth surface electrode are respectively connected with a depth sensor signal input end and an earth surface electrode signal input end of the collector through wires; the in-well electrode sensor is connected with an in-well electrode signal input end of the collector through a cable; the collector comprises an alarm module and a data processing module; wherein,
the alarm module is used for starting alarm when the electrode sensor in the well is contacted with the underground water surface;
the depth sensor is used for monitoring the lowering depth of the cable when the electrode sensor along with the water level is placed in the well in real time;
the data processing module is used for collecting the resistance among the electrodes in the 2 wells, the resistance among the surface electrode and each well electrode and the lowering depth of the cable, and calculating the accurate underground water level depth according to the collection result.
2. The apparatus for accurately measuring the groundwater level as claimed in claim 1, wherein the apparatus further comprises a tripod; wherein, the depth sensor is fixed at the top end of the tripod, and the cable is wound on the roller of the tripod.
3. The apparatus for precisely measuring the groundwater level as claimed in claim 2, wherein the apparatus further comprises a protective cover made of an insulating material, the surface of the protective cover being uniformly provided with water permeable holes; wherein, be fixed with in the safety cover 2 electrodes in the well.
4. The device for accurately measuring the groundwater level as claimed in claim 1, wherein the collector further comprises a recording module and a storage module arranged inside, and the recording module and the storage module are both connected with the data processing module; the recording module is used for recording the measuring process of each sensor, and the storage module is used for storing the measuring data of each sensor and the calculation result of the data processing module.
5. The apparatus for accurately measuring the groundwater level as claimed in claim 1, wherein the depth sensor is provided with a zeroing module; and the zero adjusting module is used for zeroing the depth data acquired by the depth sensor.
6. The apparatus for accurately measuring the groundwater level as claimed in claim 1, wherein the alarm module is one or a combination of an acoustic alarm and an optical alarm; wherein the alarm is set to alarm when the resistance between the electrodes in the 2 wells and the resistance between the surface electrode and each water level electrode sensor are simultaneously lower than a preset value.
7. A method for accurately measuring the groundwater level by the apparatus for accurately measuring the groundwater level according to any one of claims 1 to 6, wherein the method comprises the steps of:
s1, placing the depth sensor at the wellhead, and inserting the surface electrode into the subsurface beside the wellhead;
s2, connecting 2 electrodes in the well with cables and then putting the electrodes in the well into the well, and zeroing the depth sensor when the bottom end of the electrode in the well is positioned at a well mouth;
s3, starting a collector, slowly lowering the probes of the 2 electrodes in the well into the well, and observing the data acquisition condition and the alarm condition;
and S4, collecting the resistance among the 2 electrodes in the well, the resistance among the earth surface electrode and the 2 electrodes in the well and the reading of the depth sensor through a collector to accurately calculate the depth of the underground water level.
8. The method of accurately measuring the ground water level as claimed in claim 7, wherein the step S1 further comprises: installing a tripod on a wellhead, and placing a depth sensor on the tripod;
in step S2, the cable is wound around a tripod wheel.
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| CN201610696792.XA CN106197607B (en) | 2016-08-19 | 2016-08-19 | A kind of device and method of precise measurement level of ground water |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106525191A (en) * | 2016-12-16 | 2017-03-22 | 江苏省水利科学研究院 | Portable water-level measuring post for measuring underground water level |
| CN106973268A (en) * | 2017-04-17 | 2017-07-21 | 中国电建集团贵阳勘测设计研究院有限公司 | Underwater building camera device and camera method |
| CN107167212A (en) * | 2017-07-06 | 2017-09-15 | 安徽省（水利部淮河水利委员会）水利科学研究院（安徽省水利工程质量检测中心站） | The reciprocal accurate limnimeter of detection type |
| CN108362354A (en) * | 2017-11-14 | 2018-08-03 | 中国矿业大学 | A kind of portable well groundwater level water temperature limnograph device |
| CN109307544A (en) * | 2018-11-26 | 2019-02-05 | 河北省地质环境监测院 | A kind of Portable underground water water level well depth automatic measuring instrument and measurement method |
| CN110132450A (en) * | 2019-04-28 | 2019-08-16 | 内蒙古高等级公路建设开发有限责任公司 | Mountain tunnel drainage system Research on Automatic Measuring System of Temperature and test method |
| CN112901935A (en) * | 2021-01-20 | 2021-06-04 | 南京工程学院 | Data acquisition device capable of being remotely monitored and use method thereof |
| CN113073975A (en) * | 2021-03-04 | 2021-07-06 | 中国地质科学院岩溶地质研究所 | Device and method for sampling deep water sample in borehole |
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| CN109307544B (en) * | 2018-11-26 | 2024-03-12 | 河北省地质环境监测院 | Portable automatic underground water level well depth measuring instrument and measuring method |
| CN110132450A (en) * | 2019-04-28 | 2019-08-16 | 内蒙古高等级公路建设开发有限责任公司 | Mountain tunnel drainage system Research on Automatic Measuring System of Temperature and test method |
| CN112901935A (en) * | 2021-01-20 | 2021-06-04 | 南京工程学院 | Data acquisition device capable of being remotely monitored and use method thereof |
| CN112901935B (en) * | 2021-01-20 | 2023-06-16 | 南京工程学院 | Data acquisition device capable of being remotely monitored and application method thereof |
| CN113073975A (en) * | 2021-03-04 | 2021-07-06 | 中国地质科学院岩溶地质研究所 | Device and method for sampling deep water sample in borehole |
| CN113073975B (en) * | 2021-03-04 | 2022-07-12 | 中国地质科学院岩溶地质研究所 | Device and method for collecting deep water samples set in drill holes |
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