CN112697663A - Liquid purity monitoring device and method - Google Patents
Liquid purity monitoring device and method Download PDFInfo
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- CN112697663A CN112697663A CN202011276753.7A CN202011276753A CN112697663A CN 112697663 A CN112697663 A CN 112697663A CN 202011276753 A CN202011276753 A CN 202011276753A CN 112697663 A CN112697663 A CN 112697663A
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- 239000007788 liquid Substances 0.000 title claims abstract description 110
- 238000012806 monitoring device Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims abstract description 159
- 238000012544 monitoring process Methods 0.000 claims abstract description 18
- 239000012535 impurity Substances 0.000 claims description 23
- 238000004891 communication Methods 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 11
- 239000012212 insulator Substances 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 2
- 239000010687 lubricating oil Substances 0.000 abstract description 15
- 239000002923 metal particle Substances 0.000 abstract description 12
- 239000003208 petroleum Substances 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 10
- 239000002184 metal Substances 0.000 description 9
- 230000005684 electric field Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 210000004907 gland Anatomy 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000011859 microparticle Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N2015/0687—Investigating concentration of particle suspensions in solutions, e.g. non volatile residue
Abstract
The invention discloses a liquid purity monitoring device and a method, and belongs to the technical field of measuring instruments in the petroleum industry. The liquid purity monitoring device comprises: a first capacitor terminal; a second capacitor end, the second capacitor end being relatively fixed with the first capacitor end; the insulating part is used for insulating the first capacitor end and the second capacitor end and comprises a first accommodating cavity, and the first accommodating cavity is positioned between the first capacitor end and the second capacitor end; and the capacitance measuring device is respectively and electrically connected with the first capacitance end and the second capacitance end. The liquid purity monitoring device can improve the monitoring efficiency of the content of the metal particles in the liquid to be detected, improve the monitoring accuracy of the content of the metal particles in the liquid to be detected, ensure that the lubricating oil of mechanical equipment can be replaced in time, and finally ensure the normal operation of the mechanical equipment.
Description
Technical Field
The invention belongs to the technical field of measuring instruments in the petroleum industry, and particularly relates to a liquid purity monitoring device and method.
Background
Petroleum is used as a main energy source in China and plays an important role in the development of national economy, but various mechanical equipment including oil pumping units, water injection pumps, oil transfer pumps, water supply pumps and the like cannot be used for oil field production. Each mechanical equipment is provided with a lubricating system, and the quality of lubricating oil directly determines the service life of each mechanical equipment. Generally, most of the mechanical failures are caused by the pollution of the lubricating oil by solid particles, so that the real-time monitoring of the lubricating oil is directly related to the reduction of the failure rate of mechanical equipment.
The traditional mode of staring at the eyes and replacing the lubricating liquid regularly has low monitoring efficiency and poor accuracy, and is difficult to ensure the timely replacement of the lubricating oil of various mechanical equipment.
Disclosure of Invention
The invention provides a device and a method for monitoring liquid purity, and aims to ensure the timely replacement of lubricating oil of various mechanical equipment.
In order to achieve the purpose, the invention adopts the technical scheme that:
a liquid purity monitoring device comprising:
a first capacitor terminal;
a second capacitor end, the second capacitor end being relatively fixed with the first capacitor end;
the insulating part is used for insulating the first capacitor end and the second capacitor end and comprises a first accommodating cavity, and the first accommodating cavity is positioned between the first capacitor end and the second capacitor end;
and the capacitance measuring device is respectively and electrically connected with the first capacitance end and the second capacitance end.
The insulating part further comprises an insulating member for insulating the first capacitor end from the second capacitor end.
The insulating piece is arranged on the outer surface of the first capacitor end and/or the second capacitor end.
The first capacitor end is a hollow sleeve, the second capacitor end is located in the hollow sleeve, and the first accommodating cavity is located between the insulating part and the inner wall of the hollow sleeve.
The hollow sleeve is provided with a vent hole.
The second capacitor end is internally provided with a second accommodating cavity.
The liquid purity monitoring device further comprises a base, a protective cover and a meter head, wherein the meter head is fixedly connected with the base through the protective cover, the meter head is provided with a third accommodating cavity, the protective cover is provided with a fourth accommodating cavity, and the third accommodating cavity is communicated with the fourth accommodating cavity;
one end of the first capacitor end penetrates through the base to be communicated with the fourth accommodating cavity, and one end of the second capacitor end penetrates through the base to be communicated with the fourth accommodating cavity;
the capacitance measuring device is electrically connected with the first capacitance end and the second capacitance end through wires respectively.
The capacitance measuring device comprises a capacitance measuring module, a processor, a storage module, a display module, a key module, a communication module and a power module, wherein the power module is respectively electrically connected with the capacitance measuring module, the processor, the storage module, the communication module and the display module, and the power module is respectively in communication connection with the capacitance measuring module, the processor, the storage module, the communication module, the key module and the display module.
The insulating piece is arranged on the outer surface of the first capacitor end or the second capacitor end;
the first capacitor end and the second capacitor end are made of metal materials.
Compared with the prior art, the invention has the following beneficial effects: the invention discloses a liquid purity monitoring device which comprises a first capacitor end, a second capacitor end and an insulating part, wherein the first capacitor end, the second capacitor end and the insulating part form a capacitor structure. And a gap is generated between the first capacitor end and the second capacitor end through the first accommodating cavity inside the insulating part, and the gap can allow liquid to be measured to enter. When the liquid to be measured enters the gap, the capacitance of the capacitor structure is changed due to the change of the metal particles in the liquid to be measured, and finally the change of the content of the metal particles in the liquid to be measured is reflected by the change of the capacitance. The liquid purity monitoring device can improve the monitoring efficiency of the content of the metal particles in the liquid to be detected, improve the monitoring accuracy of the content of the metal particles in the liquid to be detected, ensure that the lubricating oil of mechanical equipment can be replaced in time, and finally ensure the normal operation of the mechanical equipment.
The invention also discloses a liquid purity monitoring method, which comprises the following steps:
placing a plurality of sample liquids containing different impurity contents between a first capacitor end and a second capacitor end of any one of the liquid purity monitoring devices, and measuring capacitance values corresponding to the sample liquids containing different impurity contents of the liquid purity monitoring devices under the influence of the sample liquids containing different impurity contents;
placing the liquid to be measured between a first capacitor end and a second capacitor end of the liquid purity monitoring device, and measuring the capacitance of the liquid purity monitoring device;
and comparing the capacitance value with the capacitance value to obtain the impurity content of the liquid to be detected.
Compared with the prior art, the beneficial effects of the liquid purity monitoring method provided by the invention are the same as those of the liquid purity monitoring device in the technical scheme, and the detailed description is omitted here.
Drawings
FIG. 1 is a schematic diagram showing the overall structure of a liquid purity monitoring device according to the present invention;
FIG. 2 shows a detailed block diagram at A in FIG. 1;
FIG. 3 is a block diagram of a capacitance measuring device of a liquid purity monitoring device according to the present invention;
FIG. 4 is a schematic diagram illustrating the change in capacitance in a liquid purity monitoring device according to the present invention;
fig. 5 shows a schematic diagram of the capacitor composition of fig. 4.
The labels in the figure are: 1. a base; 2. a first capacitor terminal; 3. a second capacitor terminal; 4. an insulating section; 5. a capacitance measuring device; 6. a screw; 7. a metal gland; 8. a shield; 9. a gauge head; 10. a vent hole; 11. a second accommodating chamber; 12. a first accommodating chamber; 13. a fourth accommodating chamber; 14. and a third accommodating cavity.
Detailed Description
Hereinafter, a liquid purity monitoring scheme provided by the embodiments of the present invention will be described in detail through several specific embodiments.
Example 1
Referring to fig. 1, a schematic diagram of an overall structure of a liquid purity monitoring device according to an embodiment of the present invention is shown, the liquid purity monitoring device includes:
a first capacitor terminal 2;
a second capacitor end 3, wherein the second capacitor end 3 is fixed relative to the first capacitor end 2;
an insulating part 4, wherein the insulating part 4 is used for insulating the first capacitor end 2 from the second capacitor end 3, the insulating part 4 comprises a first accommodating cavity 12, and the first accommodating cavity 12 is positioned between the first capacitor end 2 and the second capacitor end 3;
and the capacitance measuring device 5 is electrically connected with the first capacitance end 2 and the second capacitance end 3 respectively.
In the above embodiment, the liquid purity monitoring device of the present invention mainly comprises the first capacitor end 2, the second capacitor end 3, and the insulating part 4. The insulation part 4 isolates and insulates the first capacitor end 2 and the second capacitor end 3 from each other, so that the most basic capacitor structure is formed. The first capacitor end 2 and the second capacitor end 3 carry positive and negative electrons respectively after being electrified, and stable electric potential is formed. For example, the material of the first capacitor terminal 2 and the second capacitor terminal 3 may be selected from metal, porous carbon material, or other known materials capable of carrying electrons. Specifically, in an example, when the first capacitor end 2 and the second capacitor end 3 are made of metal, the first capacitor end 2 may be cylindrical, and the second capacitor end 3 may be cylindrical, as shown in fig. 2. In another example, the first capacitor end 2 is a metal plate, and the second capacitor is a metal plate.
Insulating part 4 includes first chamber 12 that holds, and first chamber 12 that holds is used for holding the liquid that awaits measuring to the liquid that awaits measuring that holds need be in the electric field that first electric capacity end 2 and second electric capacity end 3 formed, and the impurity content of the liquid that awaits measuring is different, produces different influences to the electric field that first electric capacity end 2 and second electric capacity end 3 formed. For example, when the amount of impurities in the liquid to be measured increases, the electric field formed by the first capacitor end 2 and the second capacitor end 3 is increased or decreased by the amount of impurities in the liquid to be measured, for example, when the impurities are metal, the capacitance formed by the first capacitor end 2, the second capacitor end 3 and the insulating portion 4 is increased. By way of example, the following:
typically, the fluid to be tested is a lubricating oil, in which particles smaller than 4 microns are due to normal wear and particles larger than 4 microns are due to abnormal wear. These wear-induced particles become suspended in the lubricating oil, and the capacitance of the lubricating oil increases as the number of suspended particles increases.
Referring to fig. 4 and 5, a theoretical model diagram of a liquid purity monitoring device according to the present invention includes the following specific analysis and calculation processes:
assuming one particle, one can obtain:
(1) before the microparticles are placed:
(2) after the microparticles are placed:
(3) and (3) solving the capacitance difference:
in the formula: ε - -dielectric constant of the lubricating oil;
Δ s- -particle surface area;
Δ d- -particle height;
d-the distance between the two plates;
d1- -distance between the upper surface of the particle and the upper plate;
d2- -distance between the lower surface of the particle and the upper plate.
Therefore, when metal particles appear in the pure lubricating oil, the capacitance value is increased, so that the concentration of the metal particles can be reflected by monitoring the capacitance change of the cylinder capacitor structure, the pollution degree of the lubricating oil is further confirmed, and the quality of the current lubricating oil is judged.
When the liquid purity monitoring device is used, the first accommodating cavity 12 is immersed into liquid to be measured at the time A, then the first capacitor end 2 and the second capacitor end 3 are charged, and the capacitance between the first capacitor end 2 and the second capacitor end 3 is measured after the charging is finished. And when the time B is not equal to the time A, measuring the liquid to be measured, and checking the capacitance between the first capacitor end 2 and the second capacitor end 3 when the time B is set. And comparing the capacitance of the first capacitor end 2 and the capacitance of the second capacitor end 3 in the time A with the capacitance in the time B to measure and calculate the impurity content of the liquid to be measured.
In summary, the liquid purity monitoring device of the present invention can read the capacitance of the capacitor structure formed by the first capacitor end 2, the second capacitor end 3 and the insulating part 4 through the capacitance measuring device, then measure the impurity content in the liquid to be measured, and finally indirectly measure the impurity content in the liquid to be measured through the variation of the capacitance. The capacitance of the capacitor structure is changed due to the change of the metal particles in the liquid to be detected, and finally the change of the content of the metal particles in the liquid to be detected is reflected by the change of the capacitance. The liquid purity monitoring device can improve the monitoring efficiency of the content of the metal particles in the liquid to be detected, improve the monitoring accuracy of the content of the metal particles in the liquid to be detected, ensure that the lubricating oil of mechanical equipment can be replaced in time, and finally ensure the normal operation of the mechanical equipment.
Example 2
Further, referring to fig. 1, which shows another embodiment of the liquid purity monitoring device of the present invention, the insulating portion 4 further includes an insulating member for insulating the first capacitor end 2 from the second capacitor end 3.
In the above embodiment, in order to enhance the breakdown strength between the first capacitor end 2 and the second capacitor end 3, the insulator is disposed to isolate the first capacitor end 2 from the second capacitor end 3, so that the capacitance of the first capacitor end 2 and the second capacitor end 3 is increased. The increase of the capacitance can make the liquid purity monitoring device more accurate in measurement.
Example 3
Further, referring to fig. 1, there is shown another embodiment of the liquid purity monitoring device of the present invention, wherein the insulating member is disposed on the outer surface of the first capacitor end 2 and/or the second capacitor end 3.
In the above embodiment, since the first accommodating cavity 12 is formed between the first capacitor end 2 and the second capacitor end 3, the insulating member needs to be attached to the surface of the first capacitor end 2 and/or the second capacitor end 3, and the first accommodating cavity 12 is formed.
Example 4
Further, referring to fig. 1 and fig. 2, it shows another embodiment of the liquid purity monitoring device of the present invention, the first capacitor end 2 is a hollow sleeve, the second capacitor end 3 is located in the hollow sleeve, and the first accommodating cavity 12 is located between the insulating member and the inner wall of the hollow sleeve.
In the above embodiment, the first capacitor terminal 2 is a hollow sleeve, and the side surface of the hollow sleeve is closed-loop cylindrical, and the second capacitor terminal 3 is disposed inside the hollow sleeve. The first capacitor end 2 and the second capacitor end 3 form a closed loop-shaped electric field. The closed-loop electric field is stable, and when the annular electric field is used for monitoring the liquid to be measured, the closed-loop electric field can enable the liquid to be measured to be more accurate.
Example 5
Further, referring to fig. 2, it shows another embodiment of the liquid purity monitoring device of the present invention, the hollow sleeve is provided with a vent 10.
In the above embodiment, in order to make the liquid purity monitoring device convenient to use, the hollow sleeve is provided with the vent hole 10, so that the liquid to be measured can conveniently enter the first accommodating cavity 12 in the hollow sleeve.
Example 6
Further, referring to fig. 1, it shows another embodiment of the liquid purity monitoring device of the present invention, the second capacitor end 3 has a second accommodating cavity 11 inside.
In the above embodiment, the second accommodating cavity 11 is disposed inside the second capacitor end 3, which can reduce the weight of the second capacitor end 3 and save material.
On the other hand, after the second capacitor terminal 3 is charged, since the second capacitor terminal 3 is hollow inside, if the shape of the hollow part is irregular, the outermost integrated electrons of the second capacitor terminal 3 will also be irregular. When the liquid to be measured affects the electric field between the first capacitor end 2 and the second capacitor end 3, the capacitance variation of the first capacitor end 2 and the second capacitor end 3 is more sensitive. The provision of the second containing chamber 11 can increase the measurement sensitivity of the liquid purity monitoring device.
Example 7
Further, referring to fig. 1, another embodiment of the liquid purity monitoring device of the present invention is shown, where the liquid purity monitoring device further includes a base 1, a cover 8, and a meter head 9, the meter head 9 is fixedly connected to the base 1 through the cover 8, the meter head 9 has a third accommodating cavity 14, the cover 8 has a fourth accommodating cavity 13, and the third accommodating cavity 14 is communicated with the fourth accommodating cavity 13;
one end of the first capacitor end 2 passes through the base 1 to be communicated with the fourth accommodating cavity 13, and one end of the second capacitor end 3 passes through the base 1 to be communicated with the fourth accommodating cavity 13;
the capacitance measuring device 5 is electrically connected with the first capacitance end 2 and the second capacitance end 3 through conducting wires respectively.
In the above embodiment, the first capacitor end 2 is connected to the base 1 by welding, and the third accommodating cavity 14 in the meter head 9 and the fourth accommodating cavity 13 in the cover 8 can be used for accommodating the capacitance measuring device 5 and electrically connecting the capacitance measuring device 5 with the first capacitor end 2 and the second capacitor end 3 respectively.
When the second capacitor terminal 3 is connected, the second capacitor terminal is installed at the center of the base 1, and the base 1 and the cover 8 can be fixedly connected through screw threads. The metal gland 7 is adopted to control the depth of the second capacitor end 3 extending into the shield 8. The metal gland 7 is fixed on the base 1 by screws 6. The middle part of the metal gland 7 is provided with a threaded hole, and one end of the second capacitor end 3 is in threaded connection with the threaded hole.
Example 8
Further, referring to fig. 3, it shows another embodiment of the liquid purity monitoring device according to the present invention, the capacitance measuring device 5 includes a capacitance measuring module 101, a processor 106, a storage module 102, a display module 103, a key module 104, a communication module 105 and a power module 107, the power module 107 is electrically connected to the capacitance measuring module 101, the processor 106, the storage module 102, the communication module 105 and the display module 103, respectively, and the power module 107 is communicatively connected to the capacitance measuring module 101, the processor 106, the storage module 102, the communication module 105, the key module 104 and the display module 103, respectively.
In the above embodiments, the capacitance measuring module 101, the processor 106, the storage module 102, the display module 103, the key module 104, the communication module 105 and the power module 107 are connected to form a capacitance measuring device 5 integrating display, storage, input and capacitance measurement, the capacitance measuring device 5 is directly integrated in the liquid purity monitoring device of the present invention, wherein the communication module is used to facilitate a user to obtain measurement data from a remote location.
The capacitance measuring device 5 is powered by a wide voltage range (12-36V); the signals of the capacitance measuring device 5 need to be acquired, the capacitance measuring device 5 supports an MODBUS _ RS485 protocol, RS485+ and RS 485-are connected into an RTU/PLC data acquisition control system, test result data can be uploaded to an SCADA system, and real-time online monitoring and analysis of oil quality of a lubricating system are achieved.
Example 9
Further, referring to fig. 2, it shows another embodiment of the liquid purity monitoring device according to the present invention, wherein the insulating member is disposed on the outer surface of the first capacitor end 2 or the second capacitor end 3.
In the above embodiments, when the insulating member is attached to the outer surface of the first capacitor end 2 or the second capacitor end 3, the processing difficulty can be reduced when the first capacitor end 2 or the second capacitor end 3 is insulated. And the corrosion resistance of the first capacitor end 2 or the second capacitor end 3 is improved.
Example 10
In another aspect of a method for monitoring liquid purity provided in an embodiment of the present invention, the method for monitoring liquid purity includes:
placing a plurality of sample liquids containing different impurity contents between a first capacitor end and a second capacitor end of the liquid purity monitoring device, and measuring capacitance values corresponding to the sample liquids containing different impurity contents of the liquid purity monitoring device under the influence of the sample liquids containing different impurity contents;
placing the liquid to be measured between a first capacitor end and a second capacitor end of the liquid purity monitoring device, and measuring the capacitance of the liquid purity monitoring device;
and comparing the capacitance value with the capacitance value to obtain the impurity content of the liquid to be detected.
In the above embodiment, when it is required to determine that the sample liquid has different contents of impurities during measurement, the liquid purity monitoring device measures the capacitance value of the sample liquid, so that the content of the impurities corresponds to the capacitance value. The content of impurities in the liquid to be detected can be determined conveniently when a subsequent user reads out the capacitance value.
Then, measuring the capacitance of the liquid purity monitoring device when the liquid to be measured is placed between the first capacitor end and the second capacitor end of the liquid purity monitoring device;
and comparing the capacitance value with the capacitance value to obtain the impurity content of the liquid to be detected.
Furthermore, in order to ensure the measurement accuracy of the system, the capacitance detection circuit of the liquid purity monitoring device must be calibrated, and the specific calibration method is as follows, by accessing 10 types of high-accuracy capacitors (10 pf, 20pf, 30pf, 40pf, 50pf, 60pf, 70pf, 80pf, 90pf and 100 pf) with 1% accuracy, comparing the measurement values of the capacitance detection circuit, determining the correction coefficient related to the system, so that the measured capacitance is consistent with the standard capacitance.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the present embodiment are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, descriptions related to "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Technical solutions between various embodiments may be combined with each other, but must be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Claims (10)
1. A liquid purity monitoring device, comprising:
a first capacitor terminal;
a second capacitor end, the second capacitor end being relatively fixed with the first capacitor end;
the insulating part is used for insulating the first capacitor end and the second capacitor end and comprises a first accommodating cavity, and the first accommodating cavity is positioned between the first capacitor end and the second capacitor end;
and the capacitance measuring device is respectively and electrically connected with the first capacitance end and the second capacitance end.
2. The liquid purity monitoring device of claim 1, wherein the insulating portion further comprises an insulator for insulating the first capacitor end from the second capacitor end.
3. The liquid purity monitoring device of claim 2, wherein the insulator is disposed on an outer surface of the first capacitor end and/or the second capacitor end.
4. The liquid purity monitoring device of claim 1 wherein the first capacitive end is a hollow sleeve, the second capacitive end is located within the hollow sleeve, and the first receiving chamber is located between the insulator and an inner wall of the hollow sleeve.
5. The apparatus according to claim 4, wherein the hollow sleeve is provided with a vent.
6. The liquid purity monitoring device of claim 4 wherein the second capacitor end has a second receiving cavity therein.
7. The liquid purity monitoring device of claim 6, further comprising a base, a shield, and a meter head, wherein the meter head is fixedly connected to the base through the shield, the meter head has a third accommodating cavity, the shield has a fourth accommodating cavity, and the third accommodating cavity is communicated with the fourth accommodating cavity;
one end of the first capacitor end penetrates through the base to be communicated with the fourth accommodating cavity, and one end of the second capacitor end penetrates through the base to be communicated with the fourth accommodating cavity;
the capacitance measuring device is electrically connected with the first capacitance end and the second capacitance end through wires respectively.
8. The apparatus according to claim 1, wherein the capacitance measuring device comprises a capacitance measuring module, a processor, a storage module, a display module, a button module, a communication module, and a power module, the power module is electrically connected to the capacitance measuring module, the processor, the storage module, the communication module, and the display module, respectively, and the power module is communicatively connected to the capacitance measuring module, the processor, the storage module, the communication module, the button module, and the display module, respectively.
9. The liquid purity monitoring device of claim 1 wherein said insulator is disposed on an outer surface of said first capacitor end or said second capacitor end;
the first capacitor end and the second capacitor end are made of metal materials.
10. A method of monitoring liquid purity, comprising:
placing a plurality of sample liquids with different impurity contents between a first capacitance end and a second capacitance end of the liquid purity monitoring device of any one of claims 1-9, and measuring the capacitance values corresponding to the sample liquids with different impurity contents under the influence of the sample liquids with different impurity contents;
placing the liquid to be measured between a first capacitor end and a second capacitor end of the liquid purity monitoring device, and measuring the capacitance of the liquid purity monitoring device;
and comparing the capacitance value with the capacitance value to obtain the impurity content of the liquid to be detected.
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| CN105784570A (en) * | 2016-04-21 | 2016-07-20 | 大连海事大学 | Online particle detection device and method based on microfluidic chip |
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Application publication date: 20210423 |