CN102175289A - Soil dam seepage monitoring device - Google Patents
Soil dam seepage monitoring device Download PDFInfo
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- CN102175289A CN102175289A CN 201110056740 CN201110056740A CN102175289A CN 102175289 A CN102175289 A CN 102175289A CN 201110056740 CN201110056740 CN 201110056740 CN 201110056740 A CN201110056740 A CN 201110056740A CN 102175289 A CN102175289 A CN 102175289A
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Abstract
The invention relates to a soil dam seepage monitoring device. A seepage temperature difference probe equipped with a heater, an upstream thermistor and a downstream thermistor is pre-embedded in a soil dam the seepage condition of which is to be monitored, a heating power supply switch is opened to heat the heater before monitoring, and after heating, if no seepage is monitored, the upstream thermistor and the downstream thermistor have consistent temperature rise and zero temperature difference owing to the symmetrical installation relation thereof, and a two-wire 4-20mA transmitter circuit outputs 4mA, and if seepage is monitored, the seepage lowers the temperature of the upstream thermistor and raises the temperature of the downstream thermistor, the temperature difference between the two depends upon the seepage, i.e. the severer the seepage is, the larger the temperature difference is, and the corresponding two-wire 4-20mA transmitter circuit outputs the correspondingly increased current so as to indirectly determine the presence of seepage and the degree of the seepage. The device featured by directional monitoring is merely sensitive to the seepage jeopardizing the safety of dam and avoids erroneous alarm under the situation of general rainwater seepage, besides, the reliability is high and the adaptability is good.
Description
Technical field:
The present invention relates to a kind of soil property dam seepage monitoring device, relate in particular to a kind of device of monitoring the soil property dam seepage by temperature variation.
Background technology:
According to domestic and international statistics, the dykes and dams accident that causes because of Seepage problems accounts for more than 40%, and therefore, seepage flow has become one of main contents of embankment safety monitoring, simultaneously also invented the sniffer of a lot of complexity, having comprised: transient electromagnetic method (TEM) dyke leakage detection instrument; The ground conductivity instrument (frequency domain electromagnetic methods, FEM); Lay osmometer (pore pressure gauge); Fibre Optical Sensor of thermometric degree, stress or the like when ground penetrating radar and developed recently get up.However, at present uniquely a kind ofly can popularize rapidly, widespread use surely belong to seepage water temperature probe method.Principle of work is: when the levee body infiltration coefficient increases, saturation raises, or when the shallow-layer foundation seepage occurring, and the temperature decline in the underground and inner slope levee body at dyke inner slope (downstream slope) levee toe.Utilize this seepage temperature difference phenomenon, the method for available laying thermometer is surveyed seepage place.The seepage water temperature is surveyed advantages such as having inexpensive, simple, easy operating, and is less demanding to operating personnel, therefore, obtained widespread use.But because utilization is water, native natural temperature difference, seepage temperature difference size directly is subjected to the influence of ambient temperature variation, causes detection sensitivity to change, and it is low to make reliability have height to have, and best period is 7～October of summer and autumn.Relevant patent: " the dam seepage passage detects the geothermometry system that uses " utility model, the patent No.: ZL200720143480.2.
Summary of the invention:
The object of the present invention is to provide a kind of inexpensive equally, simple, easy operating, and reliability is apparently higher than the soil property dam seepage monitoring device of common seepage temperature differential method.
The object of the present invention is achieved like this:
A kind of soil property dam seepage monitoring device, this device is designed to two-wire system 4～20mA transmitter form of standard, comprise: two-wire system 4～20mA transmitter circuit of seepage temperature difference probe and standard, by being installed in extension line on the probe support crossbeam and the well heater on the probe tips, the upstream thermistor, the downstream thermistor has been formed seepage temperature difference probe jointly, the upstream thermistor equates with the resistance of downstream thermistor, the temperature characteristic unanimity, install well heater probe be fixed in the center of probe support crossbeam away from an end of well heater, the probe that well heater is installed is vertical mutually with the probe support crossbeam, install the upstream thermistor probe away from an end of upstream thermistor and install the downstream thermistor probe be fixed in the two ends of probe support crossbeam respectively symmetrically away from an end of downstream thermistor, the probe that the upstream thermistor is installed is vertical mutually with the probe support crossbeam respectively with the probe that the downstream thermistor is installed, and it is parallel with the probe that well heater is installed jointly, the probe that the upstream thermistor is installed is isometric with the probe that the downstream thermistor is installed, and be shorter than the probe that well heater is installed, well heater joins by heating power supply switch and heating power supply, the upstream thermistor, downstream thermistor and two-wire system 4～20mA transmitter circuit join, if posistor, just be respectively RT2 and the RT1 in two-wire system 4～20mA transmitter circuit, if negative tempperature coefficient thermistor, just be respectively RT1 and the RT2 in two-wire system 4～20mA transmitter circuit, resistance R 1, R2 and capacitor C 1 have been formed low-pass filter, thermistor RT1 is connected with the positive input terminal of two-wire system 4～20mA transmitter integrated circuit XTR101 by low-pass filtering resistance R 1, thermistor RT2 is connected with the negative input end of two-wire system 4～20mA transmitter integrated circuit XTR101 by low-pass filtering resistance R 2, the resistance of low-pass filtering resistance R 1 equates with the resistance of low-pass filtering resistance R 2, the two ends of low-pass filtering capacitor C 1 respectively with two-wire system 4～20mA transmitter integrated circuit XTR101 just, negative input end connects, thermistor RT1, thermistor RT2 is powered respectively by the constant current source of two symmetries of two-wire system 4～20mA transmitter integrated circuit XTR101, all the other only relevant with two-wire system 4～20mA transmitter integrated circuit XTR101 connections are with reference to databook and the accompanying drawing 2 of two-wire system 4～20mA transmitter integrated circuit XTR101, repeat no more, the RV1 potentiometer is used for 4mA and adjusts zero point, the RV1 potentiometer is used for the adjustment of 20mA full scale, and two-wire system 4～20mA transmitter circuit of adjusting is sealed in the probe support crossbeam.
Probe with seepage temperature difference probe, well heater is installed, the upstream thermistor, one end of downstream thermistor, upwards be embedded in the soil property dykes and dams that to monitor the seepage flow situation, the probe of well heater is installed and the upstream thermistor is installed, the plane, probe place of downstream thermistor is vertical with surface level, the probe support crossbeam is vertically parallel with the seepage direction that will monitor, the probe that the upstream thermistor is installed is positioned at the upstream face that will monitor seepage flow, before the detection, open the heating power supply switch and make the well heater heating, after the heating, if there is not seepage flow, because upstream thermistor, the downstream thermistor is installed the relation of symmetry, both temperature rise unanimities, the temperature difference is zero, two-wire system 4～20mA transmitter circuit is output as 4mA, if seepage flow is arranged, seepage flow will make the temperature of upstream thermistor reduce and the temperature of downstream thermistor is raise, both temperature difference sizes, depend on the seepage flow size, seepage flow is big more, the temperature difference is big more, and the output of corresponding two-wire system 4～20mA transmitter circuit also increases thereupon, thus the indirect size whether seepage flow and seepage flow are arranged of having measured.
The present invention has following good effect:
1, soil property dam seepage monitoring device of the present invention adopts the method for local warming, does not rely on water, native natural temperature differential, the reliability height, and adaptability is good;
2, soil property dam seepage monitoring device of the present invention detects and to have directivity, only to the seepage flow sensitivity of harm embankment safety, then can not cause wrong report perpendicular to the general rainfall infiltration of surface level;
3, soil property dam seepage monitoring device of the present invention, be designed to two-wire system 4～20mA transmitter form of standard, both be convenient to data remote, also conveniently be connected on the various data acquisition units, a plurality of soil property dam seepage monitoring devices are concentrated automatically patrol and examine, by the output switching terminal mouth control heating automatically of data acquisition unit, gather the seepage flow data automatically by the analog input port of data acquisition unit again, need not to design and produce special-purpose data acquisition unit.
Description of drawings:
Fig. 1 is the seepage temperature difference probe synoptic diagram of soil property dam seepage monitoring device of the present invention.
Fig. 2 is two-wire system 4～20mA transmitter circuit figure of soil property dam seepage monitoring device of the present invention.
Embodiment:
A kind of soil property dam seepage monitoring device, as Fig. 1, shown in Figure 2, this device is designed to two-wire system 4～20mA transmitter form of standard, comprise: two-wire system 4～20mA transmitter circuit of seepage temperature difference probe and standard, by being installed in extension line 1 on the probe support crossbeam 2 and the well heater 3 on the probe tips, upstream thermistor 4, downstream thermistor 5 has been formed seepage temperature difference probe, upstream thermistor 4 equates with the resistance of downstream thermistor 5, the temperature characteristic unanimity, install well heater 3 probe be fixed in the center of probe support crossbeam 2 away from an end of well heater 3, the probe that well heater 3 is installed is vertical mutually with probe support crossbeam 2, install upstream thermistor 4 probe away from an end of upstream thermistor 4 and install downstream thermistor 5 probe be fixed in the two ends of probe support crossbeam 2 respectively symmetrically away from an end of downstream thermistor 5, the probe that upstream thermistor 4 is installed is vertical mutually with probe support crossbeam 2 respectively with the probe that downstream thermistor 5 is installed, and it is parallel with the probe that well heater 3 is installed jointly, the probe that upstream thermistor 4 is installed is isometric with the probe that downstream thermistor 5 is installed, and be shorter than the probe that well heater 3 is installed, well heater 3 joins by heating power supply switch and heating power supply, upstream thermistor 4, downstream thermistor 5 joins with two-wire system 4～20mA transmitter circuit, if posistor, just be respectively RT2 and the RT1 in two-wire system 4～20mA transmitter circuit, if negative tempperature coefficient thermistor, just be respectively RT1 and the RT2 in two-wire system 4～20mA transmitter circuit, resistance R 1, R2 and capacitor C 1 have been formed low-pass filter, thermistor RT1 is connected with the positive input terminal of two-wire system 4～20mA transmitter integrated circuit XTR101 by low-pass filtering resistance R 1, thermistor RT2 is connected with the negative input end of two-wire system 4～20mA transmitter integrated circuit XTR101 by low-pass filtering resistance R 2, the resistance of low-pass filtering resistance R 1 equates with the resistance of low-pass filtering resistance R 2, the two ends of low-pass filtering capacitor C 1 respectively with two-wire system 4～20mA transmitter integrated circuit XTR101 just, negative input end connects, thermistor RT1, thermistor RT2 is powered respectively by the constant current source of two symmetries of two-wire system 4～20mA transmitter integrated circuit XTR101, all the other only relevant with two-wire system 4～20mA transmitter integrated circuit XTR101 connections are with reference to databook and the accompanying drawing 2 of two-wire system 4～20mA transmitter integrated circuit XTR101, repeat no more, the RV1 potentiometer is used for 4mA and adjusts zero point, the RV1 potentiometer is used for the adjustment of 20mA full scale, and two-wire system 4～20mA transmitter circuit of adjusting is sealed in the probe support crossbeam 2.
Probe with seepage temperature difference probe, well heater 3 is installed, upstream thermistor 4, one end of downstream thermistor 5, upwards be embedded in the soil property dykes and dams that to monitor the seepage flow situation, the probe of well heater 3 is installed and upstream thermistor 4 is installed, the plane, probe place of downstream thermistor 5 is vertical with surface level, probe support crossbeam 2 is vertically parallel with the seepage direction that will monitor, the probe that upstream thermistor 4 is installed is positioned at the upstream face that will monitor seepage flow, before the detection, open the heating power supply switch and make well heater 3 heatings, after the heating, if there is not seepage flow, because upstream thermistor 4, downstream thermistor 5 is installed the relation of symmetry, both temperature rise unanimities, the temperature difference is zero, two-wire system 4～20mA transmitter circuit is output as 4mA, if seepage flow is arranged, seepage flow will make the temperature of upstream thermistor 4 reduce and the temperature of downstream thermistor 5 is raise, both temperature difference sizes, depend on the seepage flow size, seepage flow is big more, the temperature difference is big more, and the output of corresponding two-wire system 4～20mA transmitter circuit also increases thereupon, thus the indirect size whether seepage flow and seepage flow are arranged of having measured.
Claims (1)
1. soil property dam seepage monitoring device, it is characterized in that: the two-wire system 4～20mA transmitter circuit that comprises seepage temperature difference probe and standard, by being installed in extension line (1) on the probe support crossbeam (2) and the well heater (3) on the probe tips, upstream thermistor (4), downstream thermistor (5) has been formed seepage temperature difference probe, upstream thermistor (4) equates with the resistance of downstream thermistor (5), the temperature characteristic unanimity, the end away from well heater (3) that the probe of well heater (3) is installed is fixed in the center of probe support crossbeam (2), the probe that well heater (3) is installed is vertical mutually with probe support crossbeam (2), install upstream thermistor (4) probe away from an end of upstream thermistor (4) and install downstream thermistor (5) probe be fixed in the two ends of probe support crossbeam (2) respectively symmetrically away from an end of downstream thermistor (5), the probe that upstream thermistor (4) is installed is vertical mutually with probe support crossbeam (2) respectively with the probe that downstream thermistor (5) is installed, and it is parallel with the probe that well heater (3) is installed jointly, the probe that upstream thermistor (4) is installed is isometric with the probe that downstream thermistor (5) is installed, and be shorter than the probe that well heater (3) is installed, well heater (3) joins by heating power supply switch and heating power supply, upstream thermistor (4), downstream thermistor (5) joins with two-wire system 4～20mA transmitter circuit, if posistor, just be respectively (RT2) and (RT1) in two-wire system 4～20mA transmitter circuit, if negative tempperature coefficient thermistor, just be respectively (RT1) and (RT2) in two-wire system 4～20mA transmitter circuit, resistance (R1), (R2) and electric capacity (C1) formed low-pass filter, thermistor (RT1) is connected with the positive input terminal of two-wire system 4～20mA transmitter integrated circuit XTR101 by low-pass filtering resistance (R1), thermistor (RT2) is connected with the negative input end of two-wire system 4～20mA transmitter integrated circuit XTR101 by low-pass filtering resistance (R2), the resistance of low-pass filtering resistance (R1) equates with the resistance of low-pass filtering resistance (R2), the two ends of low-pass filtering electric capacity (C1) respectively with two-wire system 4～20mA transmitter integrated circuit XTR101 just, negative input end connects, thermistor (RT1), thermistor (RT2) is powered respectively by the constant current source of two symmetries of two-wire system 4～20mA transmitter integrated circuit XTR101, and two-wire system 4～20mA transmitter circuit of adjusting is sealed in the probe support crossbeam (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100567403A CN102175289B (en) | 2011-03-10 | 2011-03-10 | Soil dam seepage monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100567403A CN102175289B (en) | 2011-03-10 | 2011-03-10 | Soil dam seepage monitoring device |
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| CN102175289A true CN102175289A (en) | 2011-09-07 |
| CN102175289B CN102175289B (en) | 2012-07-25 |
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| CN2011100567403A Expired - Fee Related CN102175289B (en) | 2011-03-10 | 2011-03-10 | Soil dam seepage monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112233269A (en) * | 2020-09-23 | 2021-01-15 | 天津晨天自动化设备工程有限公司 | Automatic inspection system of water supply equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2366831Y (en) * | 1999-04-28 | 2000-03-01 | 陈宏磐 | Intelligent and full measuring type volume flow meter for gas |
| JP2003279437A (en) * | 2002-03-25 | 2003-10-02 | Mitsui Mining & Smelting Co Ltd | Leakage inspection device of piping |
| CN201034749Y (en) * | 2007-04-09 | 2008-03-12 | 中国水利水电科学研究院 | Geothermometry system for detecting dam leakage circulation path |
| CN101324456A (en) * | 2007-06-14 | 2008-12-17 | 西北工业大学 | Cold-hot type flowmeters and measurement method thereof |
| CN202018371U (en) * | 2011-03-10 | 2011-10-26 | 中国农业科学院农田灌溉研究所 | Earthy dam leakage monitoring device |
-
2011
- 2011-03-10 CN CN2011100567403A patent/CN102175289B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2366831Y (en) * | 1999-04-28 | 2000-03-01 | 陈宏磐 | Intelligent and full measuring type volume flow meter for gas |
| JP2003279437A (en) * | 2002-03-25 | 2003-10-02 | Mitsui Mining & Smelting Co Ltd | Leakage inspection device of piping |
| CN201034749Y (en) * | 2007-04-09 | 2008-03-12 | 中国水利水电科学研究院 | Geothermometry system for detecting dam leakage circulation path |
| CN101324456A (en) * | 2007-06-14 | 2008-12-17 | 西北工业大学 | Cold-hot type flowmeters and measurement method thereof |
| CN202018371U (en) * | 2011-03-10 | 2011-10-26 | 中国农业科学院农田灌溉研究所 | Earthy dam leakage monitoring device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112233269A (en) * | 2020-09-23 | 2021-01-15 | 天津晨天自动化设备工程有限公司 | Automatic inspection system of water supply equipment |
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| CN102175289B (en) | 2012-07-25 |
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