CN202083422U - Capacitive electromagnetic flow meter - Google Patents
Capacitive electromagnetic flow meter Download PDFInfo
- Publication number
- CN202083422U CN202083422U CN201120168899XU CN201120168899U CN202083422U CN 202083422 U CN202083422 U CN 202083422U CN 201120168899X U CN201120168899X U CN 201120168899XU CN 201120168899 U CN201120168899 U CN 201120168899U CN 202083422 U CN202083422 U CN 202083422U
- Authority
- CN
- China
- Prior art keywords
- fluid
- fluid measurement
- detecting electrode
- flow meter
- electromagnetic flow
- 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.)
- Expired - Fee Related
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Abstract
The utility model provides a capacitive electromagnetic flow meter comprising a fluid measurement opening, a magnet exciting circuit, a magnet exciting coil set, a signal processing circuit and a detecting electrode connected with the signal processing circuit, wherein the magnet exciting coil set is disposed at two sides of the fluid measurement opening, the fluid of the fluid measurement opening passes through an external side which is partially to be the fluid measurement opening, the detecting electrode is disposed between the internal side of the fluid measurement opening and the magnet exciting coil set, and the side wall of the fluid measurement opening is formed by a cylindrical sealed liner. The capacitive electromagnetic flow meter has the advantages of being anticorrosive, high in measurement precision, wide in usable range, and long in service life.
Description
Technical field
The utility model relates to a kind of electromagnetic flowmeter, particularly discloses a kind of capacitive electromagnetic flow meter.
Background technology
Electromagnetic flowmeter has obtained using widely at industrial circle owing to have characteristics such as crushing simple in structure, no, measuring accuracy height, broad quantum.Older generation's electromagnetic flowmeter becomes the electrode electromagnetic flowmeter, and its application is extensive equally.But its shortcoming is the pollution of detecting electrode burn into, leak of liquid and the problems such as flow that can't measure the low liquid of conductivity.Simultaneously, the electrode electromagnetic flowmeter because the conductivity of liquid is low, makes that its impedance is higher when detecting the lower fluid of conductivity, thus the electric current that electrode is sensed and faint, even the electrode impression is less than the generation of electric current.
Summary of the invention
The purpose of this utility model is to overcome the defective that exists in the prior art, and a kind of anticorrosion, measuring accuracy height, capacitive electromagnetic flow meter that usable range is wide are provided.
The utility model is achieved in that a kind of capacitive electromagnetic flow meter, comprise the fluid measurement mouth, field circuit, field coil group, signal processing circuit, the detecting electrode that links to each other with signal processing circuit, described field coil group is positioned at the both sides of fluid measurement mouth, the fluid of described fluid measurement mouth is the outside of fluid measurement mouth by part, it is characterized in that: described detecting electrode is between the inboard of fluid measurement mouth, field coil group, and the sidewall of described fluid measurement mouth is made of the tubular sealed liner.
Be connected with prime amplifier between described detecting electrode and the signal processing circuit.
Described sealed liner is made of soft rubber, rubberite or teflon.
Detecting electrode of the present utility model and the sealed lining of detected fluid are isolated.In the use, when the detected fluid process was measured mouth, detected fluid cutting field coil also produced magnetic field, thereby produces induction current.According to the right-hand rule as can be known, induced electricity fails to be convened for lack of a quorum vertical current to sealed liner, will form electric capacity between sealed liner and detecting electrode, is signal according to the size of storing electricity in the electric capacity, amplifies by prime amplifier, is transferred to signal processing circuit.Thereby realize the non-cpntact measurement of flow signal.
The utility model capacitive electromagnetic flow meter is applicable to the low electric conductivity fluid, and it is owing to utilize electrostatic capacitance to detect electromotive force, and signal source has high impedance.Be provided with the prime amplifier with high input impedance, for this reason, signal attenuation has been controlled to Min..Consequently, the timely low electric conductivity fluid high, but also stably measured to impedance.Electric pole type electromagnetic flowmeter detected fluid conductance lower limit is at 3 ~ 5us/cm, and the I of electrodeless formula electromagnetic flowmeter is measured the fluid of 0.01us/cm.
The utility model capacitive electromagnetic flow meter also is suitable for the tack fluid, when measuring the tack fluid, the easy attachment material of the electrode surface of existing electric pole type electromagnetic flowmeter makes deviation to occur and instability, the precision that exhausted attachment material brightness influence is measured; In addition, when the conductance of the tack material of electric pole type electromagnetic flowmeter is very high, can produce the electromotive force short circuit phenomenon, output current is reduced, influence measuring accuracy.And the capacitive electromagnetic flowmeter insulativity of the utility model attachment does not influence electrostatic capacitance between fluid and the signal electrode, can stablize accurate measurement.
The utility model contacting with fluid part reliability height, the sealed lining strict seal of detecting electrode, form the state that detecting electrode and fluid to be measured are isolated,, also fundamentally solved the problem that the electrode electromagnetic flowmeter is revealed in the prior art so do not exist detecting electrode to be corroded and frictional dissipation.In process of production; electrode " is buried " in sealed liner; play promptly that the seal protection detecting electrode is not corroded and frictional dissipation outside; also can make between the detecting electrode of sealed liner and the inside and produce electric capacity; effect with accumulate; current signal in the electric capacity carries out processing and amplifying by prime amplifier with it again, is transferred to signal processing circuit again and carries out signal Processing.
The beneficial effects of the utility model are: because detecting electrode is positioned at the sealed liner inboard, therefore detecting electrode does not contact with detected fluid, make the utility model energy measurement mud sneak into the fluid of type, attached type, severe corrosive and low conductivity, and between detecting electrode and signal processing circuit, prime amplifier is set, guarantee the accuracy of measuring-signal, have more wide prospect in industrial application.
Description of drawings
Fig. 1 is the utility model syndeton synoptic diagram.
Among the figure: 1, fluid measurement mouth; 2, field circuit; 3, field coil group; 4, signal processing circuit; 5, detecting electrode; 6, prime amplifier; 7, sealed liner.
Embodiment
According to Fig. 1, the utility model comprises fluid measurement mouth 1, field circuit 2, field coil group 3, signal processing circuit 4, detecting electrode 5, prime amplifier 6.Described field coil group 3 is positioned at the both sides of fluid measurement mouth 1, the fluid of described fluid measurement mouth 1 is the outside of fluid measurement mouth 1 by part, described detecting electrode 5 is between the inboard of fluid measurement mouth 1, field coil group 3, and the sidewall of described fluid measurement mouth 1 is made of tubular sealed liner 7.Be connected with prime amplifier 6 between described detecting electrode 5 and the signal processing circuit 4.Described sealed liner 7 is made of soft rubber, rubberite or teflon.
The utility model " buries " detecting electrode 5 in sealed liner 7 the insides, makes it not contact with detected fluid, and makes sealed liner 7 being kept perfectly property.The leakage problem that can avoid detected fluid in the flowmeter use, may take place like this.Allow the security of equipment be further improved, allow the safe operation time of equipment promote greatly.
Claims (3)
1. capacitive electromagnetic flow meter, comprise the fluid measurement mouth, field circuit, field coil group, signal processing circuit, the detecting electrode that links to each other with signal processing circuit, described field coil group is positioned at the both sides of fluid measurement mouth, the fluid of described fluid measurement mouth is the outside of fluid measurement mouth by part, it is characterized in that: described detecting electrode is between the inboard of fluid measurement mouth, field coil group, and the sidewall of described fluid measurement mouth is made of the tubular sealed liner.
2. according to the described capacitive electromagnetic flow meter of claim 1, it is characterized in that: be connected with prime amplifier between described detecting electrode and the signal processing circuit.
3. according to the described capacitive electromagnetic flow meter of claim 1, it is characterized in that: described sealed liner is made of soft rubber, rubberite or teflon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120168899XU CN202083422U (en) | 2011-05-25 | 2011-05-25 | Capacitive electromagnetic flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120168899XU CN202083422U (en) | 2011-05-25 | 2011-05-25 | Capacitive electromagnetic flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202083422U true CN202083422U (en) | 2011-12-21 |
Family
ID=45344048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120168899XU Expired - Fee Related CN202083422U (en) | 2011-05-25 | 2011-05-25 | Capacitive electromagnetic flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202083422U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274639A (en) * | 2018-03-13 | 2019-09-24 | 阿自倍尔株式会社 | Capacitive electromagnetic flow meter |
-
2011
- 2011-05-25 CN CN201120168899XU patent/CN202083422U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274639A (en) * | 2018-03-13 | 2019-09-24 | 阿自倍尔株式会社 | Capacitive electromagnetic flow meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20120525 |