CN2824028Y - PH sensor for ocean scene - Google Patents
PH sensor for ocean scene Download PDFInfo
- Publication number
- CN2824028Y CN2824028Y CN 200520027788 CN200520027788U CN2824028Y CN 2824028 Y CN2824028 Y CN 2824028Y CN 200520027788 CN200520027788 CN 200520027788 CN 200520027788 U CN200520027788 U CN 200520027788U CN 2824028 Y CN2824028 Y CN 2824028Y
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- sensor
- impedance conversion
- circuit module
- sea
- electrode
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Abstract
The utility model relates to a pH sensor for sea fields. An impedance conversion measuring circuit module of the pH sensor is arranged in a sensor casing, the lead-out terminal point of an electrode couple is directly connected with the input terminal of a change-over circuit of the impedance conversion measuring circuit module in a bridge mode, and the electrode couple and the impedance conversion measuring circuit module are integrated into a whole. Direct current signals with high internal resistance from the electrode couple are converted into direct current signals with low internal resistance in the change-over circuit of the impedance conversion measuring circuit module arranged in the cylindrical casing and are amplified, and then through a cable which is arranged at the upper end of the sensor cylindrical casing and is led out from a cable interface, the direct current signals with low internal resistance are transferred to a display of an end instrument on water to display the pH value of measured sea water. The pH sensor for sea fields of the utility model omits a leading wire from the electrode couple to the end instrument and prolongs the length of a signal transmission conducting wire between the measurement sensor and the end instrument. The utility model can satisfy the measurement requirements of depths deeper than ten meters of sea ships, shore stations and deep sea cross sections and is suitable for sea field measurement.
Description
Technical field
The utility model relates to surveying instrument, particularly relates to the surveying instrument of in-site measurement seawater pH value.
Background technology
The pH value of seawater is the important factor of marine ecology physicochemical environment, has influence on the variation of the halobiontic existence and the marine eco-environment.The pH value of seawater is all significant for the research and the application of thalassochemistry, marine biology and marine environmental protection, sea-farming etc., is one of the most basic observation project of marine environment investigation, marine pollution monitoring.
At present, the pH value in the aqueous medium mostly adopts potential method to measure, and utilizes the pair of electrodes of survey sensor to produce different potential difference (PD) in different pH value and finishes the measurement of pH value.The pH potential electrode is divided into two kinds of fundamental types on version, a kind of is discrete type electrode, and another kind is compound electrode.They are formed by contrast electrode and potential electrode, and potential electrode adopts the pH glass electrode.Compound electrode with contrast electrode and potential electrode in conjunction with forming one.Electrode sensitive partly places detected solution, and signal is transferred to end instrument through high insulated conductor, finishes measurement.
Fig. 1 shows existing pH survey sensor structure.As shown in Figure 1, pH survey sensor 1a and end instrument 2a form the pH measuring instrument.PH survey sensor 1 is connected by cable 3 with end instrument 2a.
PH survey sensor 1a is cylindrical shape, and the lower end of the cylindrical shell 5 that stainless steel material is made is provided with compound pH electrode, and the bottom end cover 6 of compound pH electrode and short cylindrical shape is fixed together.Cylindrical shell 5 upper ends are provided with cable interface 4.
Compound pH electrode is made up of pH glass electrode 7 and silver/silver chloride contrast electrode 8, in fill electrolytic solution.The electrode pair of pH glass electrode 7 and silver/silver chloride contrast electrode 8 lead-in wire is connected with cable, and is connected with impedance conversion metering circuit module 9a in the end instrument 2a by cable.Impedance conversion metering circuit module 9a comprises change-over circuit, and the direct current signal of the right high internal resistance of self-electrode in the future is converted to the direct current signal of low internal resistance and amplifies, and is last, is demonstrated the pH value of tested seawater by display.
Existing pH survey sensor belongs to the DC potential surveying instrument of high input impedance, and the high insulated conductor length of transmission measurement signal has certain limitation between potential electrode pair and the end instrument.Because the pH glass electrode that the pH potential electrode is right has high impedance, impedance is up to 10
13Ω needs the input impedance of end instrument to be higher than electrode pair output impedance, if potential electrode is long to the lead-in wire of incoming terminal instrument, can reduce the input impedance of end instrument, causes the complete machine impedance not match, and the data instability can't be measured.High insulated conductor length between existing pH survey sensor potential electrode and the end instrument utilizes it to measure seawater pH value in 1 meter, has to gather seawater sample and aboard ship or on the bank carries out.Therefore, the pH survey sensor of prior art can not satisfy ocean goer usefulness, bank station, the following requirement that fathoms of the tens of rice of the deep-sea section depth of water, is unsuitable for the ocean in-site measurement.
Summary of the invention
The conductor length of transmission measurement signal has certain limitation, is unsuitable for the problem of ocean in-site measurement between potential electrode that exists at existing pH survey sensor and the end instrument, the related scene, ocean of the utility model directly places impedance conversion metering circuit module in the sensor casing with the pH sensor, cancelled the lead-in wire of electrode pair to impedance conversion metering circuit module, prolong the length of signal transmission wire between survey sensor and the end instrument, be suitable for the pH in-site measurement of different depth seawater in the marine environment.
The related on-the-spot impedance conversion metering circuit module with the pH sensor in ocean of the utility model is arranged in the sensor housing, electrode pair draw the change-over circuit input end that end points directly is connected across impedance conversion metering circuit module, electrode pair and impedance conversion metering circuit module collection are one.The output terminal of impedance conversion metering circuit is connected with the lead of cable, and the cable that the cable interface that is provided with from sensor cylindrical shell upper end is drawn is connected with end instrument.Be converted to the direct current signal of low internal resistance in the change-over circuit of the impedance conversion metering circuit module that in cylindrical shell, is provided with from the direct current signal of the high internal resistance of electrode pair and amplify, then, the direct current signal that the cable that the cable interface that is provided with by sensor cylindrical shell upper end is drawn will hang down internal resistance passes to end instrument waterborne, is demonstrated the pH value of tested seawater by the display of end instrument.
The related scene, ocean of the utility model directly places impedance conversion metering circuit module in the sensor casing with the pH sensor, cancelled the lead-in wire of electrode pair to end instrument, prolong the length of signal transmission wire between survey sensor and the end instrument, can satisfy the measurement requirement of the following degree of depth of the tens of rice of ocean goer usefulness, bank station and the deep-sea section depth of water, be suitable for the ocean in-site measurement.
Description of drawings
Fig. 1 is existing pH survey sensor structural representation.
Fig. 2 is that the ocean is on-the-spot with pH sensor construction synoptic diagram.
1a, pH sensor 1b, the on-the-spot pH sensor of using in ocean
2a, end instrument 2b, end instrument
3, cable 4, cable interface
5, sensor cylindrical shell 6, bottom end cover
7, glass electrode 8, contrast electrode
9a, impedance conversion metering circuit module 9b, impedance conversion metering circuit module
10, display
Embodiment
Now in conjunction with the accompanying drawings embodiment of the present utility model is described.As shown in Figure 2, the ocean is on-the-spot to be cylindrical shape with pH sensor 1b, and the compound pH electrode that the lower end of cylindrical shell 5 is provided with and the bottom end cover 6 of short cylindrical shape are fixed together.Compound pH electrode is made up of pH glass electrode 7 and silver/silver chloride contrast electrode 8, in fill electrolytic solution.Cylindrical shell 5 upper ends are provided with cable interface 4.The cable 3 of drawing from cable interface 4 is connected pH sensor 1b with end instrument 2b waterborne.
Impedance conversion metering circuit module 9b is set in the cylindrical shell 5, and the exit of electrode pair directly is connected across the change-over circuit input end of metering circuit module 9b, and electrode pair and impedance conversion metering circuit module 9b collection are one.Be converted to the direct current signal of low internal resistance in the change-over circuit of the impedance conversion metering circuit module 9b that in cylindrical shell 5, is provided with from the direct current signal of the high internal resistance of electrode pair and amplify, at last, demonstrate the pH value of tested seawater by the display 10 of end instrument 2b waterborne.
Claims (2)
1, the on-the-spot pH sensor of using in a kind of ocean, the housing that comprises cylindrical shape, the lower end of cylindrical shell is provided with compound pH electrode, the cylindrical shell upper end is provided with cable interface, the cable of drawing from cable interface is connected the pH sensor with end instrument, it is characterized in that, impedance conversion metering circuit module is set in the cylindrical shell, the exit of electrode pair directly is connected across the change-over circuit input end of impedance conversion metering circuit module, and electrode pair and impedance conversion metering circuit module collection are one.
2, ocean according to claim 1 is on-the-spot uses the pH sensor, it is characterized in that the output terminal of impedance conversion metering circuit is connected with the lead of cable, and the cable that the cable interface that is provided with from sensor cylindrical shell upper end is drawn is connected with end instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520027788 CN2824028Y (en) | 2005-10-12 | 2005-10-12 | PH sensor for ocean scene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520027788 CN2824028Y (en) | 2005-10-12 | 2005-10-12 | PH sensor for ocean scene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2824028Y true CN2824028Y (en) | 2006-10-04 |
Family
ID=37033143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520027788 Expired - Fee Related CN2824028Y (en) | 2005-10-12 | 2005-10-12 | PH sensor for ocean scene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2824028Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011085525A1 (en) * | 2010-01-13 | 2011-07-21 | Zhao Ping | Split type buoy device for warning of oil spill |
| CN106383144A (en) * | 2015-07-26 | 2017-02-08 | 江苏中农物联网科技有限公司 | Intelligent ph sensor |
| CN106979963A (en) * | 2017-06-06 | 2017-07-25 | 大连华城电子有限公司 | A kind of device for measuring water quality pH value |
| CN107684412A (en) * | 2017-09-30 | 2018-02-13 | 常州凯南迪克医疗科技有限公司 | One kind miniaturization upper digestive tract dynamic ph Impedance monitoring device |
-
2005
- 2005-10-12 CN CN 200520027788 patent/CN2824028Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011085525A1 (en) * | 2010-01-13 | 2011-07-21 | Zhao Ping | Split type buoy device for warning of oil spill |
| CN106383144A (en) * | 2015-07-26 | 2017-02-08 | 江苏中农物联网科技有限公司 | Intelligent ph sensor |
| CN106979963A (en) * | 2017-06-06 | 2017-07-25 | 大连华城电子有限公司 | A kind of device for measuring water quality pH value |
| CN107684412A (en) * | 2017-09-30 | 2018-02-13 | 常州凯南迪克医疗科技有限公司 | One kind miniaturization upper digestive tract dynamic ph Impedance monitoring device |
| CN107684412B (en) * | 2017-09-30 | 2023-10-31 | 常州凯南迪克医疗科技有限公司 | Miniaturized upper gastrointestinal dynamic pH impedance monitoring device |
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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 |