CN102706406A - Water level measurement device - Google Patents
Water level measurement device Download PDFInfo
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- CN102706406A CN102706406A CN2012101673103A CN201210167310A CN102706406A CN 102706406 A CN102706406 A CN 102706406A CN 2012101673103 A CN2012101673103 A CN 2012101673103A CN 201210167310 A CN201210167310 A CN 201210167310A CN 102706406 A CN102706406 A CN 102706406A
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Abstract
A water level measurement device for measuring the water level of water bodies of rivers and lakes comprises a water level conductivity electrode (1), a conductivity meter (4), electronic switches (31, 32) and a singlechip system (5), wherein the water level conductivity electrode (1) is connected with the conductivity meter (4) through the electronic switch (31); the conductivity meter is used for measuring the conductivity value of the conductivity electrode; and the data signal of the conductivity meter is transmitted to the singlechip system (5). The water level measurement device is characterized in that the device also includes a reference conductivity electrode (2); the reference conductivity electrode is connected with the conductivity meter through the electronic switch (32); and the singlechip system controls the electronic switches (31, 32) to make the conductivity meter alternately measure the conductivity values of the water level conductivity electrode and the reference conductivity electrode, and calculates the ratio of the conductivity values of the water level conductivity electrode to the reference conductivity electrode. The device provided by the invention can eliminate the influences of the temperature change and the electrolyte content change of the water body on the water level so as to immediately and accurately measure the water level.
Description
Technical field
The present invention relates to a kind of measurement mechanism of measuring SEA LEVEL VARIATION, relate in particular to a kind of measurement mechanism that comprises the SCM system of conductance electrode and conductivity meter and data processing, belong to hydrogeological parameter automatic measuring device field.
Background technology
The situation of change of water level size and long-time interior water level is the important parameter of research seepage action of ground water, dam seepage safety, pipe stream and flood control, and therefore, the measurement of water level and monitoring have important significance for theories and practical significance.
In present research and using, the someone has proposed a kind of glassware for drinking water that utilizes has electric conductivity, and the power of water body electric conductivity to be measured can converse the measurement mechanism of corresponding water level through the reaction of water body electric conductivity value through the size of electric conductivity value.
Its know-why is: the size of water body electric conductivity value is relevant with the electrode coefficient of the conductivity of water body and conductance electrode, and the size of electrode coefficient and the spacing of electrode are inversely proportional to, and is directly proportional with interelectrode conductive area, that is:
G?=?X·?J=?X·?S/L（?1?)
G is that electricity is led in the formula; X is the conductivity of water body; J is the electrode coefficient; S is a conductive area; L is an electrode separation; S/L.
Its technical scheme is: in the long straight tube (measuring tube) of an insulativity material, along pipe range two equally spaced tinsels are set, tinsel is equivalent to two electrodes.Because two tinsel constant, promptly L is a constant.When in the measuring tube water being arranged, so the height of conductive area and water level is proportional, and according to formula (1), electric conductivity value and water level are with linear.During SEA LEVEL VARIATION, electric conductivity value also can change accordingly.
Under the situation that electrolyte content (conductivity) remains unchanged in the temperature of water body and water body, this technical scheme can reflect water level value in time, exactly.But also have weak point, promptly therefore the electric conductivity value of river, lake, river body can not accurately reflect the water level of said water body with the temperature of water body, electrolytical changes of contents and difference in the water body in actual use.
Summary of the invention
The present invention is directed to the deficiency of prior art, propose a kind of level measurement device, its technical matters that will solve is, eliminates the influence to the level measuring of this water body of the temperature, electrolyte content of water body, measures water level accurately.
The technical scheme of level measurement device of the present invention is: comprise water level conductance electrode 1, conductivity meter 4, electronic switch 31,32, SCM system 5; Described water level conductance electrode 1 is in the long straight tube of rigidity of an insulativity material, along pipe range two equally spaced structures wiry is set, as level sensor; The water level conductance electrode is connected with conductivity meter 4 through electronic switch 31; Described conductivity meter is used to measure the electric conductivity value on the conductance electrode; Electric conductivity value signal conveys to SCM system 5 is characterized in that: described level measurement device also comprises a reference conductance electrode electrode 2, and this reference conductance electrode is in an insulativity rigidity of material pipe; The structure of pair of conductive electrode is set; Described conductive electrode is drawn with the waterproof insulation cable, and this reference conductance electrode is connected with conductivity meter through electronic switch 32, and described SCM system control electronic switch 31,32 makes conductivity meter alternately measure the electric conductivity value on water level conductance electrode and the reference conductance electrode; And the electric conductivity value on water level conductance electrode and the reference conductance electrode carried out scale operation, calculate water level value; Described reference conductance electrode 2 all immerses in the water body when using.
The electrode coefficient of said reference conductance electrode equates with the conductive electrode coefficient of the lowest water level of water level conductance electrode.
The conductive electrode of described reference conductance electrode is tabular.
The conductive electrode of the tinsel of said water level conductance electrode and reference conductance electrode is a stainless steel material.
Level measurement device of the present invention is provided with the reference conductance electrode, the reference electric conductivity value that produces on this electrode, and the variation because of water level does not change; Only change with the temperature of water body and the variation of electrolyte content.Electric conductivity value on the water level conductance electrode is except that following SEA LEVEL VARIATION; Also change with the temperature of water body, the variation of electrolyte content; Through alternately measuring the electric conductivity value on water level conductance electrode and the reference conductance electrode; Both are carried out scale operation, and its operation result can be eliminated the variation of temperature and electrolyte content of water body to the influence of water level, thereby measures water level in time, exactly.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Contrast description of drawings embodiment of the present invention at present.
Level measurement device of the present invention comprises water level conductance electrode 1, reference conductance electrode electrode 2, electronic switch 31,22, conductivity meter 4, SCM system 5; Described water level conductance electrode 1 is in the long straight tube of an insulativity material, along pipe range two equally spaced structures wiry is set, and as level sensor, the pipe range of said long straight tube can satisfy the requirement of measuring peak level; The structure of described reference conductance electrode 2 is in an insulativity tubes of material, and the structure of pair of conductive electrode is set, and described conductive electrode is drawn with the waterproof insulation cable; Water level conductance electrode 1 is connected with conductivity meter 4 through electronic switch 31,32 respectively with reference conductance electrode 2; SCM system 5 control electronic switches 31,32 are alternately connected water level conductance electrode 1 and reference conductance electrode 2 with conductivity meter 4; Make conductivity meter alternately measure water level electric conductivity value and reference electric conductivity value, described conductivity meter is the existing product that has the output of electric conductivity value data-signal; The data-signal of conductivity meter is delivered to SCM system 5; Described SCM system carries out scale operation with the electric conductivity value of the water level conductance electrode of being accepted and the electric conductivity value data-signal of reference conductance electrode; Convert corresponding water level value data to, also show, store, be provided with communication interface 6 in the SCM system and can accept instruction and transmission data.
For reducing the length of reference conductance electrode, this electrode also can immerse in the water body when lowest water level, and its conductive electrode is tabular.
For preventing the corrosion of water body to conductive electrode, the conductive electrode of described reference conductance electrode and water level conductance electrode adopts stainless steel material to process.
Level measurement device of the present invention is provided with the reference conductance electrode can eliminate the influence to level measuring of the temperature of water body, electrolyte content, and its principle is:
Electric conductivity value on measuring process middle water level conductance electrode 1 is that the electricity of the water level temperature of leading variable and water body, the electricity of electrolyte content are led the function of variable, and expression formula is:
G=(G
25+ΔG
25)?×m
i（1+k·Δt）?（2）
In the formula (2):
G is the electric conductivity value on the water level conductance electrode;
G
25The electric conductivity value of lowest water level when being 25 ℃;
Δ G
25The electric conductivity value of water level increment when being 25 ℃;
m
iBe electrolyte concentration coefficient in the water body, different concentration has concentration factor separately;
K is that electrolytical concentration is relevant in temperature coefficient and the water body of water body;
Δ t is the temperature variation when departing from 25 ℃;
Can find out that from formula (2) if only be converted into water level value according to the electric conductivity value on the water level conductance electrode 1 be inaccurate.
Level measurement device of the present invention is provided with the reference conductance electrode, the reference electric conductivity value that produces on this electrode, and the variation because of water level does not change; But change with the temperature of water body and the variation of electrolyte content.Expression formula is:
G’=?G
25’?m
i?(1+?k·Δt） （3）
G ' is the electric conductivity value of reference conductance electrode in the formula (3), G
25' electric conductivity value when being 25 ℃;
The electrode coefficient during at lowest water level equates that G is arranged with the water level conductance electrode when design reference conductance electrode, to make the electrode coefficient
25'=G
25, in SCM system, carrying out the scale operation of formula (2) and formula (3), operation result is:
G/G’=(G
25+ΔG
25)?×m
i（1+k·Δt）/?G
25’?m
i?(1+?k·Δt）
=1+ΔG
25/?G
25 （4）
After can finding out that from formula (4) electric conductivity value of electric conductivity value and the reference conductance electrode of water level conductance electrode carries out scale operation, the influence of temperature and electrolyte concentration is eliminated, and its operation result only water level value with corresponding is relevant.
Claims (4)
1. a level measurement device comprises water level conductance electrode (1), conductivity meter (4), electronic switch (31,32), SCM system (5); Described water level conductance electrode (1) is in the long straight tube of rigidity of an insulativity material, along pipe range two equally spaced structures wiry is set, as level sensor; The water level conductance electrode is connected with conductivity meter (4) through electronic switch (31); Described conductivity meter is used to measure the electric conductivity value on the conductance electrode; Electric conductivity value signal conveys to SCM system (5) is characterized in that: described level measurement device also comprises a reference conductance electrode electrode (2), and this reference conductance electrode is in an insulativity rigidity of material pipe; The structure of pair of conductive electrode is set; Described conductive electrode is drawn with the waterproof insulation cable, and this reference conductance electrode is connected with conductivity meter through electronic switch (32), and described SCM system control electronic switch (31,32) makes conductivity meter alternately measure the electric conductivity value on water level conductance electrode and the reference conductance electrode; And the electric conductivity value on water level conductance electrode and the reference conductance electrode carried out scale operation, calculate water level value; When using, described reference conductance electrode (2) all immerses in the water body.
2. level measurement device according to claim 1 is characterized in that: the electrode coefficient of said reference conductance electrode (2) equates with the electrode coefficient of the lowest water level of water level conductance electrode (1).
3. level measurement device according to claim 1 is characterized in that: the conductive electrode of described reference conductance electrode is tabular.
4. level measurement device according to claim 1 is characterized in that: the conductive electrode of the tinsel of said water level conductance electrode and reference conductance electrode is a stainless steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101673103A CN102706406A (en) | 2012-05-28 | 2012-05-28 | Water level measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101673103A CN102706406A (en) | 2012-05-28 | 2012-05-28 | Water level measurement device |
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| Publication Number | Publication Date |
|---|---|
| CN102706406A true CN102706406A (en) | 2012-10-03 |
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ID=46899357
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101673103A Pending CN102706406A (en) | 2012-05-28 | 2012-05-28 | Water level measurement device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632023A (en) * | 2019-01-25 | 2019-04-16 | 浙江大学 | A kind of flowmeter and its method based on electrical principles |
| CN110608786A (en) * | 2019-10-31 | 2019-12-24 | 上海雷奎流体科技有限公司 | A Conductivity Liquid Level Gauge |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401024C (en) * | 2001-07-13 | 2008-07-09 | 三星电子株式会社 | Water level sensor |
| CN201716069U (en) * | 2010-02-01 | 2011-01-19 | 河海大学 | Device for measuring water-level fluctuation automatically |
| CN202562561U (en) * | 2012-05-28 | 2012-11-28 | 丁婕 | Water level measuring device |
-
2012
- 2012-05-28 CN CN2012101673103A patent/CN102706406A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401024C (en) * | 2001-07-13 | 2008-07-09 | 三星电子株式会社 | Water level sensor |
| CN201716069U (en) * | 2010-02-01 | 2011-01-19 | 河海大学 | Device for measuring water-level fluctuation automatically |
| CN202562561U (en) * | 2012-05-28 | 2012-11-28 | 丁婕 | Water level measuring device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632023A (en) * | 2019-01-25 | 2019-04-16 | 浙江大学 | A kind of flowmeter and its method based on electrical principles |
| CN110608786A (en) * | 2019-10-31 | 2019-12-24 | 上海雷奎流体科技有限公司 | A Conductivity Liquid Level Gauge |
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| PB01 | Publication | ||
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Application publication date: 20121003 |