CN2482088Y - Impedance miniature rotary impeller flow velocity sensor - Google Patents
Impedance miniature rotary impeller flow velocity sensor Download PDFInfo
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- CN2482088Y CN2482088Y CN 01212843 CN01212843U CN2482088Y CN 2482088 Y CN2482088 Y CN 2482088Y CN 01212843 CN01212843 CN 01212843 CN 01212843 U CN01212843 U CN 01212843U CN 2482088 Y CN2482088 Y CN 2482088Y
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- electrode
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Abstract
The utility model relates to a resistance type micro propeller flow velocity sensor, which comprises the electrode, the leading wire, and the instrument of an original sensor. The utility model is characterized in that more than one pair of reference electrodes are also fixed on a machine body, the position is symmetrical with an original measuring electrode, the surface status of the reference electrode and the connection with the surface of the machine body is fully identical with the original measuring electrode. Because the reference electrode is additionally arranged near an original propeller, the resistance change of the measuring electrode is only opposite to the rotation change of the reference electrode and the propeller, and the influence of the water body electrical conductivity change is reduced to the negligible degree, to cause the adaptation rang, the stability and the reliability of the utility model to the water quality to be improved greatly.
Description
The utility model belongs to the measurement flow rate sensor, is the miniature rotating plasma flow sensor of a kind of impedance type specifically.
The existing several different methods of oar rotating speed is revolved in measurement, wherein a kind of is the impedance type flow sensor, be applicable to measurement flow rate in conducting liquid, characteristics are near revolving near the oar, in the face of revolving oar pair of metal electrodes is set, will revolves oar and rotate the variation that becomes to inter-electrode impedance, so by measuring the rate of change of impedance, can obtain revolving the oar rotating speed, and then obtain flow velocity V.Because electrode can be made 1 millimeter of diameter at an easy rate, this impedance type rotating plasma flow sensor is that volume can reach minimum with respect to the rotating plasma flow sensor advantage of other kinds, to the interference minimum of current, therefore in the water conservancy scientific research field, used in a large number.But there be the shortcoming narrow to water quality accommodation in existing impedance type rotating plasma flow sensor always, because pure electrical conductivity of water may be less than 5 little west, high salinity water or highly doped electrical conductivity of water may be greater than 3000 little west, this moment, variation of temperature also may be brought 10-20 conductivity variations doubly, so big variation order adopts the apparatus measures scope of impedance type rotating plasma flow sensor all not cover under the situation that does not change design parameter, thereby also makes stability of instrument and reliability decrease.
The purpose of this utility model provides a kind of water body conductivity variations can the influence be reduced to the miniature rotating plasma flow sensor of the impedance type of ignoring degree, to overcome above-mentioned deficiency.To achieve these goals, the utility model comprises electrode, lead-in wire and the instrument of original sensor, and wherein electrode is fixed on and revolves on the oar body, is characterized in also having a pair of above reference electrode to be fixed on the body, and its position and former potential electrode are symmetrical; The diameter of reference electrode, material, surface appearance and all identical with former potential electrode with being connected of body surface; The front of reference electrode is not in the face of revolving oar.
The utility model is owing to adopt former and set up reference electrode near revolving oar, the impedance variation that makes potential electrode is only with respect to reference electrode with revolve oar and rotate and change, the influence of water body conductivity variations is reduced to the degree of ignoring, the utility model is improved greatly to water quality accommodation, stability and reliability.
Fig. 1 is the utility model structural representation.
Fig. 2 is former impedance type rotating plasma flow sensor structural representation.
Further specify the utility model below in conjunction with accompanying drawing.
Former impedance type rotating plasma flow sensor measures electrode 1 is fixed near the body 3 that revolves the oar 2 (Fig. 2), and the output of electrode 1 is connected with external instrument 5 by lead-in wire 4, and instrument 5 is used for the impedance between the potential electrode 1 is converted into flow velocity V.Because the difference of water quality, the conductivity of water body is also different, the resulting data of above-mentioned measuring method are also different in application, because in different water quality, impedance between the electrode 1 is different, and its solution is the many water quality parameters of design in instrument 5, converts with regard to using different parameters according to different water quality, but instrument 5 can not be imported all water quality parameters wherein, thereby makes the stability and the reliability decrease of instrument 5.The utility model adopt set up a pair of diameter, material, surface appearance and with being connected and former potential electrode 1 identical reference electrode 6 (Fig. 1) of body 3 surfaces, be used to measure in the almost impedance between the reference electrode 6 under the static state of water quality, reference electrode 6 fronts are not in order to reduce to revolve the influence of 2 pairs of reference electrodes 6 of oar in the face of revolving oar 2.The output of reference electrode 6 is connected with external instrument 5 by lead-in wire 4 ' equally, and then instrument 5 just can be by " deducting " impedance between the reference electrode 6 with the impedance between the former potential electrode 1, thereby converse flow velocity V.Adopt this structure of the present utility model just need in instrument 5, not design water quality parameter, and the influence of water body conductivity variations can be reduced to the degree of ignoring, the utility model is improved greatly to water quality accommodation, stability and reliability.
Claims (3)
1, the miniature rotating plasma flow sensor of a kind of impedance type, the electrode (1), lead-in wire (4) and the instrument (5) that comprise original sensor, wherein electrode (1) is fixed on and revolves on the oar body (3), it is characterized in that: also have a pair of above reference electrode (6) to be fixed on the body (3), its position and former potential electrode (1) are symmetrical.
2, according to the miniature rotating plasma flow sensor of the described impedance type of claim 1, it is characterized in that: the diameter of reference electrode (6), material, surface appearance and with body (3) surface be connected all identical with former potential electrode (1).
3, according to claim 1 or the miniature rotating plasma flow sensor of 2 described impedance types, it is characterized in that: the front of reference electrode (6) is not in the face of revolving oar (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01212843 CN2482088Y (en) | 2001-03-26 | 2001-03-26 | Impedance miniature rotary impeller flow velocity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01212843 CN2482088Y (en) | 2001-03-26 | 2001-03-26 | Impedance miniature rotary impeller flow velocity sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2482088Y true CN2482088Y (en) | 2002-03-13 |
Family
ID=33631948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01212843 Expired - Fee Related CN2482088Y (en) | 2001-03-26 | 2001-03-26 | Impedance miniature rotary impeller flow velocity sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2482088Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013056648A1 (en) * | 2011-10-18 | 2013-04-25 | Pan Zhaokeng | Axial-flow type impedance water flow sensor |
-
2001
- 2001-03-26 CN CN 01212843 patent/CN2482088Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013056648A1 (en) * | 2011-10-18 | 2013-04-25 | Pan Zhaokeng | Axial-flow type impedance water flow sensor |
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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 |