CN219799308U - Water solution salinity measuring device - Google Patents
Water solution salinity measuring device Download PDFInfo
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- CN219799308U CN219799308U CN202320379515.1U CN202320379515U CN219799308U CN 219799308 U CN219799308 U CN 219799308U CN 202320379515 U CN202320379515 U CN 202320379515U CN 219799308 U CN219799308 U CN 219799308U
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- mcu module
- salinity
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 239000000523 sample Substances 0.000 claims abstract description 102
- 238000001514 detection method Methods 0.000 claims abstract description 29
- 239000000243 solution Substances 0.000 claims description 16
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 230000010287 polarization Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 11
- 238000005259 measurement Methods 0.000 description 10
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 238000011160 research Methods 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000009364 mariculture Methods 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model discloses a water solution salinity measuring device, which comprises an MCU module, a conductivity detection module and a power supply module, wherein the conductivity detection module comprises a first switch unit, a second switch unit and a first probe, a second probe, a third probe and a fourth probe which are respectively connected with the MCU module, wherein the first probe, the second probe, the third probe and the fourth probe are respectively arranged on the first switch unit and the second switch unit of the MCU module, and the conductivity detection module comprises a first probe, a second probe, a third probe and a fourth probe, wherein the first probe and the second probe are respectively arranged on the first switch unit and the second probe: the first switch unit is also connected with the power supply module and the first probe; the second switch unit is connected with the third switch unit and the second probe, and two resistors are arranged between the second switch unit and the second probe; the third switch unit is also connected to the power module. According to the utility model, bipolar driving of the first probe and the second probe is realized through selection and switching of different channels controlled by the MCU module, so that the polarization effect of the probes is greatly reduced. Based on the utility model, the four-electrode driving circuit is realized by a simple device, and the volume and the production cost of the detection device can be effectively reduced while the detection precision is maintained.
Description
Technical Field
The utility model relates to the technical field of detection, in particular to a water solution salinity measuring device.
Background
It is often necessary to measure the salinity of an aqueous solution during production and life. Salinity measurement in mariculture and a seawater fish tank; and measuring the salt content (TDS, hardness) of the purified domestic drinking water in a kitchen, measuring the salinity of the soup and the brine in the dish making process, and the like. The common salinity measuring method is as follows:
1. morse method/silver nitrate titration method, measuring chlorine content (Cl in NaCl)
2. The ion electrode method measures the amount of sodium (Na in NaCl) to determine the salt concentration.
3. In the refractometer method, since the refractive index increases with the increase of solubility in an aqueous solution, the salt concentration can be measured by measuring the refractive index.
4. Conductivity methods determine salt concentration by measuring the conductivity of a solution, since salt (NaCl) conductivity is higher than other substances.
Wherein the conductivity method has the following advantages over other methods: the operation is simple and convenient, and the measurement time is short (second level); no reagent is needed, and the method is suitable for field measurement; detection tools such as a titrator and a pipettor are not needed; the automatic measurement can be realized, so that the difference between testers does not exist, the experience of operators is not needed, and any person can easily perform the measurement; easy to clean and store, and can be cleaned by wiping the electrode with water or alcohol; in addition, the measuring electrode only needs gold plating or platinum plating, so that the cost of the equipment is greatly reduced.
In detection systems for conductivity methods, it is most common to use two electrode measurements, one for energizing and the other for receiving a voltage. When the number of the electrodes is increased, the detection accuracy can be improved, and multi-electrode probes such as four electrodes, six electrodes and the like are commonly used abroad. At present, the importance of the research work of four-electrode measurement conductivity is strengthened in China, and many scientific research institutions and universities develop researches on the multi-electrode parameter detection technology and achieve certain results. To improve the measurement accuracy, increasing the number of electrodes is necessary for future development of conductivity sensors.
However, four-electrode or multi-electrode conductivity measurement devices often require complex and precise measurement circuitry, thus increasing the cost of the system, and thus the electrodes currently used in common household salinity meter products are still two-electrode probes. In the field of ordinary consumption, how to improve the detection precision or the service life of electrodes by adopting a multi-electrode method without increasing the production cost is a technical problem which needs to be researched and overcome.
Disclosure of Invention
In view of the technical problems, the utility model provides a water solution salinity measuring device, which solves the problems of complex structure, large volume and high cost of a multi-electrode conductivity sensor core body through circuit design.
Other features and advantages of the utility model will be apparent from the following detailed description, or may be learned by the practice of the utility model.
The utility model aims to provide a water solution salinity measuring device, which comprises an MCU module, a conductivity detection module and a power supply module, wherein the conductivity detection module comprises a first switch unit, a second switch unit and a third switch unit which are respectively connected with the MCU module, and a first probe, a second probe, a third probe and a fourth probe which are arranged side by side in physical space, wherein the first probe, the second probe, the third probe and the fourth probe are arranged in parallel, and the second probe is arranged on the first switch unit and the third switch unit:
the first switch unit is also connected with the power supply module and the first probe and is used for transmitting different voltages to the first probe under the triggering of the MCU module;
the second switch unit is connected with the third switch unit and the second probe, two resistors are arranged between the second switch unit and the second probe, and the second switch unit is used for enabling different resistors to be conducted with the third switch unit under the triggering of the MCU module;
the third switch unit is also connected with the power supply module and is used for transmitting different voltages to the second probe after passing through the second switch unit and the resistor under the triggering of the MCU module;
the MCU module is also connected with the third probe and the fourth probe through an analog-to-digital converter and is used for receiving signals of the third probe and the fourth probe so as to convert the signals into water solution salinity.
Further, the MCU module, the power module and the conductivity detection module are arranged in a shell, a display screen is arranged on the surface of the shell, and the display screen is used for displaying signals which are converted by the MCU module and are related to the salinity of the water solution.
Further, a key is further arranged on the surface of the shell and used for triggering the MCU module to control the first switch unit, the second switch unit and the third switch unit.
Further, the first switch unit, the second switch unit and the third switch unit are single pole double throw switches.
Further, the voltage output by the power supply module to the first probe and the second probe is 0V or 3.3V.
The technical scheme of the utility model has the following beneficial effects:
the bipolar driving of the first probe and the second probe is realized through the selection and the switching of different channels controlled by the MCU module, so that the polarization effect of the probes is greatly reduced. The third probe and the fourth probe are signal acquisition electrodes, and the current flowing through the surfaces of the electrodes can be extremely small, so that errors caused by probe polarization are not needed to be considered, and the detection accuracy is improved.
Based on the utility model, the four-electrode driving circuit is realized by a simple device, and the volume and the production cost of the detection device can be effectively reduced while the detection precision is maintained.
Drawings
FIG. 1 is a block diagram showing the structure of a measuring apparatus according to an embodiment of the present specification;
FIG. 2 is a schematic diagram of the structure of the measuring device in the embodiment of the present specification;
fig. 3 is a schematic view of the structure of fig. 2 without the housing.
Reference numerals:
1. an MCU module; 21. a first switching unit; 22. a second switching unit; 23. a third switching unit; 24. a first probe; 25. a second probe; 26. a third probe; 27. a fourth probe; 28. a resistor; 3. a power module; 4. an analog-to-digital converter; 5. a display screen; 6. a key; 7. and a main board.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, the embodiment of the present specification provides an aqueous solution salinity measuring apparatus, including an MCU module 1, a conductivity detection module, and a power module 3, wherein the conductivity detection module includes a first switch unit 21, a second switch unit 22, a third switch unit 23, and a first probe 24, a second probe 25, a third probe 26, and a fourth probe 27, which are respectively connected to the MCU module 1, and are disposed side by side in physical space, wherein: the first switch unit 21 is further connected to the power module 3 and the first probe 24, and is configured to transmit different voltages to the first probe 24 under the triggering of the MCU module 1; the second switch unit 22 is connected to the third switch unit 23 and the second probe 25, two resistors 28 are arranged between the second switch unit 22 and the second probe 25, and the second switch unit 22 is used for conducting different resistors 28 and the third switch unit 23 under the triggering of the MCU module 1; the third switch unit 23 is further connected to the power module 3, and is configured to transmit different voltages to the second probe 25 after passing through the second switch unit 22 and the resistor 28 under the triggering of the MCU module 1; the MCU module 1 is also connected to the third and fourth probes 26 and 27 through the analog-to-digital converter 4 for receiving signals of the third and fourth probes 26 and 27 to be converted into aqueous salinity.
In one embodiment, as shown in fig. 2-3, the MCU module 1, the power module 3 and the conductivity detection module are disposed in a housing, and a display 5 is disposed on the surface of the housing, where the display 5 is configured to display signals from the salinity of the associated aqueous solution converted by the MCU module 1. The surface of the shell is also provided with a key 6, and the key 6 is used for triggering the MCU module 1 to control the first switch unit 21, the second switch unit 22 and the third switch unit 23. In addition, the MCU module 1, the first switch unit 21, the second switch unit 22, the third switch unit 23, the resistor 28, and the control circuit, the management circuit, and the like for connecting the power supply module 3 in the above-described embodiments may be integrated on the main board 7.
The voltage output from the power module 3 to the first probe 24 and the second probe 25 is 0V or 3.3V.
Description of principle: the MCU module 1 may be a single-chip microcomputer, and has a plurality of IO ports, where different IO ports control different first switch units 21, second switch units 22, third switch units 23, and analog-to-digital converters 4. The first switch unit 21, the second switch unit 22 and the third switch unit 23 may be specifically single-pole double-throw switches, and then the IO pin of the MCU module 1 controls the first switch unit 21 to switch between 0V and 3.3V constant voltages, and the common end of the first switch unit 21 is connected to the first probe 24; the third probe 26 and the fourth probe 27 are respectively connected with two input channels of the analog-to-digital converter 4; the fourth probe 27 is connected with two resistors 28 at the same time, and the two resistors 28 are respectively connected into two input channels of the second switch unit 22; the IO pin of the MCU module 1 controls the second switch unit 22 to realize the switching of the two resistors 28; the common terminal of the second switch unit 22 is connected with the common terminal of the third switch unit 23; the IO pin of the MCU module 1 controls the third switch unit 23 to realize the switching of the constant voltage of 0V and 3.3V. Bipolar driving of the first probe 24 and the second probe 25 is achieved by different channel selections and switching controlled by the MCU module 1, thereby greatly reducing the polarization effect of the probes. The analog-digital converter 4 outputs signals of the third probe 26 and the fourth probe 27, and differential and common-film signal deviation elimination are performed, so that the detection accuracy can be improved. Among them, the third probe 26 and the fourth probe 27 serve as signal acquisition electrodes, and the current flowing through the electrode surface is generally extremely small, so that there is no need to consider errors caused by probe polarization, which can improve the detection accuracy.
In addition, exemplary, the detection principle of the specific solution salinity obtained by the measuring device is provided: conductivity is the ability of a solution to conduct electricity in a digital representation. The conductivity of water has a certain relation with the amount of inorganic acid, alkali and salt contained in the water, when the concentration of the water is low, the conductivity increases along with the increase of the concentration, so that when the first probe 24 and the second probe 25 are electrified, the electric signals received by the third probe 26 and the fourth probe 27 are positively correlated with the solubility, and the conductivity of the current solution and the salinity of the solution can be known through the collection and analysis of the electric signals.
The technical scheme of the utility model has the following beneficial effects:
bipolar driving of the first probe 24 and the second probe 25 is achieved by different channel selections and switching controlled by the MCU module 1, thereby greatly reducing the polarization effect of the probes. The third probe 26 and the fourth probe 27 are signal collecting electrodes, and the current flowing through the surfaces of the electrodes can be extremely small, so that errors caused by probe polarization are not needed to be considered, and the detection accuracy is improved.
Based on the utility model, the four-electrode driving circuit is realized by a simple device, and the volume and the production cost of the detection device can be effectively reduced while the detection precision is maintained.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model. Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the utility model and form different embodiments. For example, in the claims below, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (5)
1. The utility model provides a water solution salinity measuring device, its characterized in that includes MCU module, conductivity detection module, power module, conductivity detection module including connect in respectively first switch unit, second switch unit, third switch unit of MCU module and including first probe, second probe, third probe, the fourth probe that set up side by side in physical space, wherein:
the first switch unit is also connected with the power supply module and the first probe and is used for transmitting different voltages to the first probe under the triggering of the MCU module;
the second switch unit is connected with the third switch unit and the second probe, two resistors are arranged between the second switch unit and the second probe, and the second switch unit is used for enabling different resistors to be conducted with the third switch unit under the triggering of the MCU module;
the third switch unit is also connected with the power supply module and is used for transmitting different voltages to the second probe after passing through the second switch unit and the resistor under the triggering of the MCU module;
the MCU module is also connected with the third probe and the fourth probe through an analog-to-digital converter and is used for receiving signals of the third probe and the fourth probe so as to convert the signals into water solution salinity.
2. The device for measuring the salinity of the aqueous solution according to claim 1, wherein the MCU module, the power module and the conductivity detection module are arranged in a shell, and a display screen is arranged on the surface of the shell and is used for displaying signals which are converted by the MCU module and are related to the salinity of the aqueous solution.
3. The water solution salinity measuring device according to claim 2, wherein the housing surface is further provided with a key for triggering the control of the first, second and third switching units by the MCU module.
4. The water solution salinity measuring device according to claim 1, wherein the first switch unit, the second switch unit, and the third switch unit are single pole double throw switches.
5. The apparatus of claim 4, wherein the voltage output by the power module to the first and second probes is either 0V or 3.3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320379515.1U CN219799308U (en) | 2023-03-03 | 2023-03-03 | Water solution salinity measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320379515.1U CN219799308U (en) | 2023-03-03 | 2023-03-03 | Water solution salinity measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219799308U true CN219799308U (en) | 2023-10-03 |
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ID=88186328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320379515.1U Active CN219799308U (en) | 2023-03-03 | 2023-03-03 | Water solution salinity measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219799308U (en) |
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2023
- 2023-03-03 CN CN202320379515.1U patent/CN219799308U/en active Active
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