CN111024797A - Film-covered sensor - Google Patents
Film-covered sensor Download PDFInfo
- Publication number
- CN111024797A CN111024797A CN201911196558.0A CN201911196558A CN111024797A CN 111024797 A CN111024797 A CN 111024797A CN 201911196558 A CN201911196558 A CN 201911196558A CN 111024797 A CN111024797 A CN 111024797A
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- CN
- China
- Prior art keywords
- sensor
- film
- cap
- wall
- head
- Prior art date
- 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.)
- Pending
Links
- 239000003792 electrolyte Substances 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 239000012528 membrane Substances 0.000 claims abstract 2
- 230000001747 exhibiting effect Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 239000010408 film Substances 0.000 description 19
- 238000005259 measurement Methods 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010364 biochemical engineering Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- 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
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/4166—Systems measuring a particular property of an electrolyte
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Pathology (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Molecular Biology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
A film sensor, comprising: the sensor comprises a convex body and a sensor cap fastened on the body, wherein the head of the convex body is sealed in the cap, so that a cavity is formed between the head of the convex body and the inner side of the cap wall of the sensor cap, and the sensor cap is provided with a through hole on the cap wall close to one side of a base of the convex body; the covering film covers the end face of the sensor cap; one end of the elastic sealing sheet is arranged on the outer wall of the head of the convex body and is positioned between the through hole and the covering film, and the other end of the elastic sealing sheet is contacted with the inner wall of the sensor cap; electrolyte is wrapped in a cavity formed by the elastic sealing sheet, the inner wall of the sensor cap, the coating film and the outer wall of the head of the convex body; a sensing element disposed within the male body head end face and in contact with the cover membrane; and after being connected with the sensitive element, the lead is led out of the film-covered sensor through the inside of the body.
Description
Technical Field
The invention belongs to the technical field of analytical instruments, and particularly relates to a film-covered sensor.
Background
In the fields of marine economy, biochemical engineering, environmental protection and the like, chemical components such as dissolved oxygen, hydrogen, ammonia nitrogen content, sulfur dioxide and the like in a water body need to be detected and analyzed, and a film-covered sensor is very common in detection. In order to ensure the accuracy of such an analysis, it is necessary to ensure that the pressure between the coating and the sensor element remains constant. Since the coating film is a thin film having a certain strength, the pressure applied to the coating film cannot be too large. If the electrolyte pressure in the film-covered sensor is too large, the electrolyte can push the film open, so that the film is deformed to be separated from the sensor element, and the measurement of the film-covered sensor is influenced. If the electrolyte pressure in the film-covered sensor continues to increase, the electrolyte can burst the film, and the film-covered sensor is damaged.
Disclosure of Invention
The invention provides a film-covered sensor with a self-balancing water pressure function, which consists of a sensor body, an elastic floating sheet (or an elastic sealing sheet), electrolyte and a sensor cap. The elastic floating sheet is embedded on the sensor body. The end face of the sensor cap is provided with a film, electrolyte is filled in the sensor cap, and the other end of the sensor cap is provided with an external thread screwed on the internal thread of the sensor body. The elastic floating piece is made of soft rubber and used for isolating electrolyte and water solution, and when the water pressure of the water outside the sensor changes, the elastic floating piece can slide on the inner wall of the sensor cap, so that the water pressure of the electrolyte in the sensor cap is balanced with the water pressure of the external water.
The pressure balance sensor with the water pressure is not influenced by the change of the external water pressure, so that the pressure of the film attached to the sensor element is not changed. The film-coated sensor is ensured to have good measurement stability and reliability.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:
FIG. 1 is a schematic cross-sectional view of a film-covered sensor according to one embodiment of the invention.
1-water body, 2-film, 3-sensitive element, 4-electrolyte, 5-sensor cap, 6-elastic sealing piece, 7-through hole, 8-sensor body, 9-wire and 10-container.
Detailed Description
According to one or more embodiments, the film-coated sensor capable of balancing water pressure comprises a sensor body, an elastic floating sheet (elastic sealing sheet), electrolyte and a sensor cap. The sensor cap is provided with a film and electrolyte. The sensor body and the sensor cap are screwed together by threads, and the covering film has certain pressure on a sensitive element on the sensor body after being screwed. The elastic floating sheet on the sensor main body is made of soft (much softer than the coating film) rubber and is used for isolating electrolyte from external water solution. When the water pressure of the water outside the film-coated sensor changes, the elastic floating sheet can slide up and down on the inner wall of the sensor cap to balance the pressure of electrolyte and the external water, so that the film-coated sensor has certain constant pressure on the sensitive element on the sensor body, and the film-coated sensor has good measurement stability and reliability. The sensing elements can be selected differently according to different detection parameters.
As shown in fig. 1, a film 2 of the film-covered sensor assembly is fixed on a sensor cap 5, an electrolyte 4 is contained in the sensor cap 5, and a through hole 7 is formed in the sensor cap 5. The sensing element 3 is fixed on the sensor body 8 and connected with the lead 9. The elastic sealing sheet 6 is fixed on the sensor body 8 in a sealing way. The sensor cap 5 is screwed and fixedly connected to the sensor body 8, so that the covering film 2 is tightly attached to the end face of the sensitive element 3. When the film-covered sensor assembly is placed in a river channel or a container 10, water in the water body 1 flows in or out due to pressure changes at the inner end and the outer end of a through hole 7 in the sensor cap 5, and the elastic sealing sheet 6 can slide up and down on the inner wall of the sensor cap 5 to balance the pressure of the electrolyte 4 and the pressure of the external water body 1, so that the pressure of the film 2 on the sensitive element 3 cannot change along with the change of the depth of the film-covered sensor in the water body 1.
It should be noted that while the foregoing has described the spirit and principles of the invention with reference to several specific embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, nor is the division of aspects, which is for convenience only as the features in these aspects cannot be combined. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (3)
1. A film sensor, comprising:
a body exhibiting a convex shape;
a sensor cap fastened to the body and sealing the head of the male body within the cap such that the head of the male body forms a cavity with the inside of the cap wall of the sensor cap, the sensor cap having a through hole opened in the cap wall on a side close to the base of the male body;
the covering film is covered on the end face of the sensor cap;
one end of the elastic sealing sheet is arranged on the outer wall of the head of the convex body and is positioned between the through hole and the covering film, and the other end of the elastic sealing sheet is contacted with the inner wall of the sensor cap;
the electrolyte is wrapped in a cavity formed by the elastic sealing sheet, the inner wall of the sensor cap, the coating film and the outer wall of the head of the convex body;
a sensing element disposed within the male body head end face and in contact with the cover membrane;
and the lead is connected with the sensitive element and then is led out of the film-covered sensor through the inside of the body.
2. The film-covered sensor according to claim 1, wherein the sensor cap is fastened to the body by a screw thread.
3. The film-covered sensor according to claim 1, wherein the sealing elastic film is made of soft rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911196558.0A CN111024797A (en) | 2019-11-29 | 2019-11-29 | Film-covered sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911196558.0A CN111024797A (en) | 2019-11-29 | 2019-11-29 | Film-covered sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111024797A true CN111024797A (en) | 2020-04-17 |
Family
ID=70207017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911196558.0A Pending CN111024797A (en) | 2019-11-29 | 2019-11-29 | Film-covered sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111024797A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2100732U (en) * | 1991-09-28 | 1992-04-08 | 王禾 | Alarm for lack of oxygen in fish pond |
| DE4232909A1 (en) * | 1992-10-01 | 1994-04-07 | Conducta Endress & Hauser | Electrochemical sensor filling and servicing process - ensures secure fastening of parts and maintenance of hermetic electrolyte space vol. |
| CN103852506A (en) * | 2012-11-30 | 2014-06-11 | 上海仪电科学仪器股份有限公司 | Gas sensing electrode with constant pressure film structure |
| CN104634837A (en) * | 2015-02-03 | 2015-05-20 | 北京华科仪科技股份有限公司 | Electrochemical sensor and manufacturing method thereof |
| CN204679198U (en) * | 2015-06-26 | 2015-09-30 | 中国工程物理研究院总体工程研究所 | Easy assembling type sputtered thin film pressure transducer |
| RU2574423C1 (en) * | 2014-12-15 | 2016-02-10 | Открытое Акционерное Общество "Акмэ-Инжиниринг" | Hydrogen sensor in liquid and gas media |
| US20160238477A1 (en) * | 2015-02-18 | 2016-08-18 | L'essor Français Electronique | Unknown |
| CN110297031A (en) * | 2019-07-22 | 2019-10-01 | 苏州益品德环境科技有限公司 | A kind of dissolved oxygen and the two-in-one sensor of temperature |
| CN211402237U (en) * | 2019-11-29 | 2020-09-01 | 上海仪电科学仪器股份有限公司 | Film-covered sensor |
-
2019
- 2019-11-29 CN CN201911196558.0A patent/CN111024797A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2100732U (en) * | 1991-09-28 | 1992-04-08 | 王禾 | Alarm for lack of oxygen in fish pond |
| DE4232909A1 (en) * | 1992-10-01 | 1994-04-07 | Conducta Endress & Hauser | Electrochemical sensor filling and servicing process - ensures secure fastening of parts and maintenance of hermetic electrolyte space vol. |
| CN103852506A (en) * | 2012-11-30 | 2014-06-11 | 上海仪电科学仪器股份有限公司 | Gas sensing electrode with constant pressure film structure |
| RU2574423C1 (en) * | 2014-12-15 | 2016-02-10 | Открытое Акционерное Общество "Акмэ-Инжиниринг" | Hydrogen sensor in liquid and gas media |
| CN104634837A (en) * | 2015-02-03 | 2015-05-20 | 北京华科仪科技股份有限公司 | Electrochemical sensor and manufacturing method thereof |
| US20160238477A1 (en) * | 2015-02-18 | 2016-08-18 | L'essor Français Electronique | Unknown |
| CN204679198U (en) * | 2015-06-26 | 2015-09-30 | 中国工程物理研究院总体工程研究所 | Easy assembling type sputtered thin film pressure transducer |
| CN110297031A (en) * | 2019-07-22 | 2019-10-01 | 苏州益品德环境科技有限公司 | A kind of dissolved oxygen and the two-in-one sensor of temperature |
| CN211402237U (en) * | 2019-11-29 | 2020-09-01 | 上海仪电科学仪器股份有限公司 | Film-covered sensor |
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