CN2596356Y - Laboratory salinometer - Google Patents
Laboratory salinometer Download PDFInfo
- Publication number
- CN2596356Y CN2596356Y CN 03204211 CN03204211U CN2596356Y CN 2596356 Y CN2596356 Y CN 2596356Y CN 03204211 CN03204211 CN 03204211 CN 03204211 U CN03204211 U CN 03204211U CN 2596356 Y CN2596356 Y CN 2596356Y
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- CN
- China
- Prior art keywords
- sea water
- conductivity cell
- conductance cell
- water conductivity
- measuring
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model relates to a high-precision automation laboratory instrument for measuring the salinity of a sea water sample. The utility model is composed of a measured sea water conductivity cell, a standard sea water conductivity cell, a measuring circuit, a single chip machine, a water groove, a stirrer, a water pump, etc., wherein, the measured sea water conductivity cell and the standard sea water conductivity cell are electrode type conductivity cells and are made of glass with a good quality. A platinum electrode coated with platinum black is arranged in the measured sea water conductivity cell and the standard sea water conductivity cell. The conductivity cells are connected to the interior of the measuring circuit through the electrodes. The excitation signal source of the measuring circuit is a square wave generator which is connected with the measured sea water conductivity cell and a precise resistor wound with wires through converting switches. The measured sea water conductivity cell and the precise resistor wound with wires are also connected with the standard sea water conductivity cell and an amplifier which are connected with a public amplifying converter and the single chip machine. The utility model relates to a laboratory salinometer, which has the advantages of accurate measurement, high stability, convenient operation and high automatization. Any adjustment and meter check are not required in a whole process from calibration to measurement. As long as a measuring key is pressed, measuring and digital counting can be started and the temperature and salinity measuring value of the sea water sample can be displayed, recorded or stored. The laboratory salinometer can be widely used for salinity measurement for sea stations, research vessels, offshore platforms and all laboratories and has broad development and application prospects.
Description
Technical field
The utility model is a kind of Marine Sciences surveying instrument, specifically is meant to be used for the instrument that the seawater sample salinity is measured in the laboratory.
Background technology
Seawater salinity is basic oceanographic hydrological element, has vital role in scientific research of seas, ocean development and marine environmental protection, is the important measurement project of oceanographic survey, oceanographic observation and marine pollution monitoring.
Current experiments chamber salinometer mainly contains two kinds of induction type and electric pole types.These two kinds of salinometers all adopt measuring bridge, and the final ratio arms numerical value behind the bridge balance is the conductivity ratio, look into thalassography table commonly used according to conductivity ratio and TWS value again and try to achieve the salinity value.In addition, also need adjust measuring bridge and look into thalassography table commonly used during instrument calibration.In a word, the calibration of salinometer and measuring process are to adjust the process of bridge balance, make salimity measurement pretty troublesome, simultaneously, temperature survey need be provided with temperature-sensing element and temperature measurement circuit, makes apparatus structure more complicated, and this just gives calibration, the reinspection of salinometer instrument and keeps stability to increase unfavorable factor.Therefore, realizing the measurement robotization of laboratory salinometer, improve accuracy and stability, is marine technology personnel's striving direction.
Summary of the invention
The utility model is released a kind of new automated laboratory salinometer, two conductance cells that fill seawater sample to be measured and urnormal are respectively inserted in the metering circuit as " resistive element ", utilize computing machine to calculating, obtain water sample salinity value as the circuit transmission coefficient of salinity function.
The structure of laboratory salinometer described in the utility model includes metering circuit, tested seawater conductance cell, urnormal conductance cell, single-chip microcomputer, tank, stirrer, water pump etc.
Tested seawater conductance cell and urnormal conductance cell are the electric pole type conductance cells, make with high-quality glass, and interior dress is coated with the platinum electrode of platinum black.Tested seawater conductance cell and urnormal conductance cell fill tested seawater sample and urnormal sample respectively, and are connected in the metering circuit by electrode.
Metering circuit is made up of exciting signal source, switch, tested seawater conductance cell, urnormal conductance cell, amplifier, public magnification changer, stake resistance.
Exciting signal source is a square-wave generator, be connected with accurate wire-wound resistor with tested seawater conductance cell by switch, tested seawater conductance cell is connected with amplifier with the urnormal conductance cell again with accurate wire-wound resistor, the urnormal conductance cell is connected with public magnification changer with amplifier again, public magnification changer is connected with single-chip microcomputer, the signal that is calculated metering circuit by single-chip microcomputer draws salinity, temperature value, and sends into demonstration, printing and PC.
The urnormal conductance cell makes metering circuit insert fixing accurate wire-wound resistor by switch and gets final product thermometric also as temperature-sensing element.This design can be provided with temperature-sensing element separately, and make temperature survey and the shared same circuit of salimity measurement, metering circuit structure and thermometric running program have been simplified greatly, and make and monitor that at any time the tank temperature becomes possibility, thereby can realize that calibration temperature is avoided in the salimity measurement accuracy and the influence of temperature difference when measuring.
Salimity measurement or temperature survey are controlled by switch.When switch is connected exciting signal source and tested seawater conductance cell, carry out salimity measurement, the transmission coefficient of metering circuit is the function of salinity, calculates water sample salinity value by single-chip microcomputer, and demonstrates measured value by display.When switch is connected exciting signal source and accurate wire-wound resistor, carry out temperature survey, the transmission coefficient of metering circuit is the function of temperature, draws the TWS value by single-chip microcomputer, and demonstrates measured value by display.
The related laboratory salinometer of the utility model is measured accurately, and good stability is easy and simple to handle, the automaticity height.From the whole process that is scaled to measurement, neither need any adjustment also not need to table look-up, just measurement, digital computation be can enter as long as press the measurement key, and temperature, the salimity measurement value of seawater sample shown, write down or store.This laboratory salinometer can be widely used in the salimity measurement in ocean observation station, research ship, offshore platform and all laboratories, has the wide development application prospect.
Description of drawings
Fig. 1 is the laboratory salinometer circuit structure diagram.Among the figure, 1-exciting signal source, 2-switch, the tested seawater conductance cell of 3-, the accurate wire-wound resistor of 4-, 5-urnormal conductance cell, 6-amplifier, 7-stake resistance, the public magnification changer of 8-, 9-single-chip microcomputer, 10-display, 11-printer, 12-PC machine.
Fig. 2 is a laboratory salinometer profile front elevation.Among the figure, 13-urnormal water inlet switch, 14-detected water sample water inlet switch, the speed governing of 15-stirrer, 16-freeing port, the 17-drainage switch, 18-tank pore, 19-air pump switch, 20-switch button, the 21-whip switch, 22-keyboard, 23-display screen, 24-conductance cell tank.
Embodiment
Now in conjunction with the accompanying drawings embodiment of the present utility model is described.As shown in Figure 1, exciting signal source 1 links to each other with an electrode of tested seawater conductance cell 3 and an end of accurate wire-wound resistor 4 by switch 2.The electrode of another electrode of tested seawater conductance cell 3, the other end of accurate wire-wound resistor 3 and urnormal conductance cell 5 and the input end of amplifier 6 connect altogether, another electrode of urnormal conductance cell 5, the output terminal of amplifier 6 are connected with the input end of public magnification changer 8, the output terminal of public magnification changer 8 connects single-chip microcomputer 9, and single-chip microcomputer 9 connects display 10, printer 11 and PC 12 again.
Claims (3)
1, a kind of laboratory salinometer, include tested seawater conductance cell, the urnormal conductance cell, metering circuit, single-chip microcomputer, tank, stirrer, water pump etc., it is characterized in that tested seawater conductance cell 3 and urnormal conductance cell 5 electrode by separately is connected metering circuit, exciting signal source 1 is connected with accurate wire-wound resistor 4 with tested seawater conductance cell 3 by switch 2, tested seawater conductance cell 3 is connected with amplifier 6 with urnormal conductance cell 5 again with accurate wire-wound resistor 4, urnormal conductance cell 3 is connected with public magnification changer 8 with amplifier 6 again, and public magnification changer 8 is connected with single-chip microcomputer 9.
2, according to the described laboratory salinometer of claim 1, it is characterized in that exciting signal source 1 links to each other with an electrode of tested seawater conductance cell 3 and an end of accurate wire-wound resistor 4 by switch 2, the electrode of another electrode of tested seawater conductance cell 3, the other end of accurate wire-wound resistor 4 and urnormal conductance cell 5 and the input end of amplifier 6 connect altogether.
3, according to the described laboratory salinometer of claim 1, it is characterized in that another electrode of urnormal conductance cell 5, the output terminal of amplifier 6 are connected with the input end of public magnification changer 8, the output terminal of public magnification changer 8 connects single-chip microcomputer 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03204211 CN2596356Y (en) | 2003-02-17 | 2003-02-17 | Laboratory salinometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03204211 CN2596356Y (en) | 2003-02-17 | 2003-02-17 | Laboratory salinometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2596356Y true CN2596356Y (en) | 2003-12-31 |
Family
ID=33753969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03204211 Expired - Fee Related CN2596356Y (en) | 2003-02-17 | 2003-02-17 | Laboratory salinometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2596356Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735713A (en) * | 2012-07-16 | 2012-10-17 | 国家海洋技术中心 | High-precision seawater salinity gauge |
| CN105021663A (en) * | 2015-07-30 | 2015-11-04 | 东南大学 | Salinity measurement method |
| CN107576690A (en) * | 2017-10-24 | 2018-01-12 | 哈尔滨工程大学 | One kind detection seawater salinity and temperature integrated sensor chip and its manufacture method |
| CN110320244A (en) * | 2019-07-29 | 2019-10-11 | 山东省科学院海洋仪器仪表研究所 | A kind of seawater salinity measuring system and method based on orthogonal lock-in-amplifier technology |
-
2003
- 2003-02-17 CN CN 03204211 patent/CN2596356Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735713A (en) * | 2012-07-16 | 2012-10-17 | 国家海洋技术中心 | High-precision seawater salinity gauge |
| CN105021663A (en) * | 2015-07-30 | 2015-11-04 | 东南大学 | Salinity measurement method |
| CN105021663B (en) * | 2015-07-30 | 2017-07-28 | 东南大学 | A kind of salimity measurement method |
| CN107576690A (en) * | 2017-10-24 | 2018-01-12 | 哈尔滨工程大学 | One kind detection seawater salinity and temperature integrated sensor chip and its manufacture method |
| CN110320244A (en) * | 2019-07-29 | 2019-10-11 | 山东省科学院海洋仪器仪表研究所 | A kind of seawater salinity measuring system and method based on orthogonal lock-in-amplifier technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |