CN204330037U - A kind of concussion of the jet based on electromagnet water flow sensor - Google Patents
A kind of concussion of the jet based on electromagnet water flow sensor Download PDFInfo
- Publication number
- CN204330037U CN204330037U CN201420832020.0U CN201420832020U CN204330037U CN 204330037 U CN204330037 U CN 204330037U CN 201420832020 U CN201420832020 U CN 201420832020U CN 204330037 U CN204330037 U CN 204330037U
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- China
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- electromagnet
- magnetic field
- detecting electrode
- jet
- flow sensor
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Abstract
The utility model discloses a kind of jet based on electromagnet concussion water flow sensor, comprises housing; In the jet chamber that enclosure interior is offered, magnetic field generator, magnetic field generator is by power supply, the current control circuit be connected with power supply and the first electromagnet and the second electromagnet form, first detecting electrode and the second detecting electrode, be arranged in main channel, and lay respectively at the central axis place of the first electromagnet and the second electromagnet length direction.The utility model solves and is adopting permanent magnetism excitation to use in the scheme of permanent-magnet steel excitation, along with the growth of service time, magnetic field can be weakened, and presetting parameter and magnetic field center can change along with the change of magnetic field intensity, to such an extent as to the technical matters that accuracy of detection reduces greatly.
Description
Technical field
The utility model relates to field of flow detection, particularly a kind of concussion of the jet based on electromagnet water flow sensor.
Background technology
Day by day in short supply along with global freshwater resources, seems particularly important to the accurate-metering of water consumption and management.Water meter is as the important measurement instrument of water consumption, its metering accuracy, measurement range, dependability, life-span and function and manufacturing cost etc. are all related to the metering of water and the clearing of water rate, and control the use value of the aspects such as use water, using water wisely and management of the use of water.And flow sensor is as the core component in water meter, the effect in water meter is very outstanding.
Jet stream water meter is one of main species in electronic water meter, its principle of work is as follows: when the current in closed conduct enter jet measurement chamber, due to the wall attachment effect (also known as " Koln is special " effect-" Coanda effect ") of jet and the principle of control jet feedback, aqueous fluid is vibrated in measurement chamber, this oscillation frequency is directly proportional to the flow velocity or volumetric flow rate flowing through pipeline, and not by the impact of the physical property of fluid.As long as therefore detect the oscillation frequency of fluid, the parameters such as the flow velocity of tested aqueous fluid, flow and water consumption just can be known.
In order to the oscillation frequency of test fluid in jet chamber, current is more: the piezoelectric signal detection method of pressure type and electromagnetic signal detection method etc. are several.Piezoelectric signal detection method is more difficult owing to installing, and input sensitivity is not very high, and simultaneously piezoelectric sensing element is afraid of tide very much again, therefore seldom uses in the detection of discharge; The more of electromagnetic signal detection method is the scheme adopting permanent magnetism excitation (using permanent-magnet steel excitation).
In the scheme adopting permanent magnetism excitation (using permanent-magnet steel excitation), usually permanent magnet is utilized to generate magnetic field, but, along with the growth of service time, magnetic field can be weakened, presetting parameter and magnetic field center can change along with the change of magnetic field intensity, to such an extent as to accuracy of detection reduces greatly.On the other hand, the irregular jet chamber that current enter also can produce considerable influence to accuracy of detection.
Utility model content
The utility model object is to provide a kind of jet based on electromagnet concussion water flow sensor, solve and adopting permanent magnetism excitation to use in the scheme of permanent-magnet steel excitation, along with the growth of service time, magnetic field can be weakened, presetting parameter and magnetic field center can change along with the change of magnetic field intensity, to such an extent as to the technical matters that accuracy of detection reduces greatly.
The technical solution adopted in the utility model is: a kind of concussion of the jet based on electromagnet water flow sensor, comprising:
Housing;
In the jet chamber that enclosure interior is offered, jet chamber is symmetrical gradually along water yield approach axis space amplifies;
Magnetic field generator, magnetic field generator is by power supply, the current control circuit be connected with power supply and the first electromagnet and the second electromagnet form, power supply is powered to the first electromagnet and the second electromagnet by current control circuit, when current control circuit to detect in the first electromagnet and the second electromagnet that current value is unequal or exceed presetting scope, the distribution of adjustment electric current or electric current;
First electromagnet and the second electromagnet, be symmetricly set in inside center place, jet chamber, and in degree angle, the passage between the first electromagnet and the second electromagnet is main channel, and two passages of the equal diameters that inwall corresponding with jet chamber is respectively formed are feedback channel; Two electromagnet are for generating the uniform magnetic field of intensity between 600GS-800GS;
First detecting electrode and the second detecting electrode, be arranged in main channel, and lay respectively at the central axis place of the first electromagnet and the second electromagnet length direction.
Further, before the first detecting electrode and the second detecting electrode use, to be immersed in application water ~ hour.
Further, the first detecting electrode and the second detecting electrode adopt model to be that the stainless steel of L is made.
Further, the volume of the first electromagnet and the second electromagnet is: long 20mm, wide 15mm, thick 5mm.
The utility model provides a kind of jet based on electromagnet to shake water flow sensor, by replacing permanent magnet with electromagnet and making the technical scheme that feedback channel diameter is consistent, improve the stability of jet chamber internal magnetic field, thus add the precision of detection and the service time of sensor.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of concussion of the jet based on electromagnet water flow sensor in the utility model;
Fig. 2 is the first electromagnet and the second work of electromagnet schematic diagram in the utility model.
Embodiment
Embodiment 1:
As shown in Figure 1, 2, a kind of concussion of the jet based on electromagnet water flow sensor, comprising:
Housing 1;
In the jet chamber 2 that enclosure interior is offered, jet chamber 2 is symmetrical gradually along water yield approach axis space amplifies;
Magnetic field generator, magnetic field generator is by power supply, the current control circuit be connected with power supply and the first electromagnet 5 and the second electromagnet 6 form, power supply is powered to the first electromagnet 5 and the second electromagnet 6 by current control circuit, when current control circuit to detect in the first electromagnet 5 and the second electromagnet 6 that current value is unequal or exceed presetting scope, the distribution of adjustment electric current or electric current;
First electromagnet 5 and the second electromagnet 6, be symmetricly set in inside center place, jet chamber, in 45 degree of angles, the passage between the first electromagnet 5 and the second electromagnet 6 is main channel 3, and two passages of the equal diameters that inwall corresponding with jet chamber 2 is respectively formed are feedback channel 4; Two electromagnet are for generating the uniform magnetic field of intensity between 600GS-800GS;
First detecting electrode 7 and the second detecting electrode 8, is arranged in main channel 3, and lays respectively at the central axis place of the first electromagnet 5 and the second electromagnet 6 length direction;
The surface roughness Ra parameter value of the first detecting electrode 7 and the second detecting electrode 8 is less than or equal to 0.04 μm, and the processing technology of the first detecting electrode 7 and the second detecting electrode 7 comprises the following steps: 1 chooses stainless steel material as the first detecting electrode and the second detecting electrode; First detecting electrode and the rough turn roughness that is machined to of the second detecting electrode are reached Ra 0.7 μm-Ra 0.9 μm by 2; First detecting electrode and the second detecting electrode finish turning are machined to roughness by 3 reaches Ra 0.2 μm-Ra 0.4 μm; Polishing is carried out on 4 pairs of the first detecting electrodes and the second detecting electrode surface, makes its surface roughness Ra parameter value be less than or equal to 0.05 μm.
Should soak 24 ~ 48 hours in application water before first detecting electrode 7 and the second detecting electrode 8 use, and the stainless steel material adopted is the trade mark is the stainless steel of 316L.The volume of the first electromagnet 5 and the second electromagnet 6 is: long 20mm, wide 15mm, thick 5mm.
Because magnetic field intensity B is directly proportional to measured signal amplitude E, i.e. E=(kW) Bv, in formula: k is regulation coefficient; W is weighting function, and v is the flow velocity of measured medium.Usually, after detecting electrode position is determined, its weighting function value also just determines.Obtain higher measuring-signal amplitude, except weighting function, also directly relevant with the intensity in magnetic field, therefore signal amplitude to be increased and magnetic field intensity B value must be improved, but magnetic induction density can cause again the iron rust in tested pipeline to be drawn onto on the Measurement channel of sensor too greatly, affects the normal work of sensor.
For this reason, the magnetic field intensity produced in magnetic field generator should be greater than 600GS and be less than 800GS, and experiment proves, intensity level maintains 700GS and is advisable.Adopt after electromagnet, can easily by the strength control in magnetic field within this scope, and keep enough stability.On the other hand, feedback channel 4 is identical due to diameter, strengthens concussion, makes detection become more easy.
The utility model provides a kind of jet based on electromagnet to shake water flow sensor, by replacing permanent magnet with electromagnet and making the technical scheme that feedback channel diameter is consistent, improve the stability of jet chamber internal magnetic field, thus add the precision of detection and the service time of sensor.
Above; be only embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (4)
1., based on a jet concussion water flow sensor for electromagnet, it is characterized in that, comprising:
Housing (1);
In the jet chamber (2) that described enclosure interior is offered, described jet chamber (2) is symmetrical gradually along water yield approach axis space amplifies;
Magnetic field generator, described magnetic field generator is by power supply, the current control circuit be connected with power supply and the first electromagnet (5) and the second electromagnet (6) form, power supply is powered to described first electromagnet (5) and the second electromagnet (6) by current control circuit, when current value during current control circuit detects described first electromagnet (5) and the second electromagnet (6) is unequal or when exceeding presetting scope, the distribution of adjustment electric current or electric current;
Described first electromagnet (5) and the second electromagnet (6), be symmetricly set in inside center place, described jet chamber, in 45 degree of angles, passage between described first electromagnet (5) and the second electromagnet (6) is main channel (3), and two passages of the equal diameters that inwall corresponding with jet chamber (2) is respectively formed are feedback channel (4); Two described electromagnet are for generating the uniform magnetic field of intensity between 600GS-800GS;
First detecting electrode (7) and the second detecting electrode (8), be arranged in described main channel (3), and lay respectively at the central axis place of described first electromagnet (5) and the second electromagnet (6) length direction.
2. a kind of jet based on electromagnet concussion water flow sensor according to claim 1, is characterized in that: before described first detecting electrode (7) and the second detecting electrode (8) use, and is immersed in and applies in water 24 ~ 48 hours.
3. a kind of concussion of the jet based on electromagnet water flow sensor according to claim 2, is characterized in that, described first detecting electrode (7) and the second detecting electrode (8) employing model are that the stainless steel of 316L is made.
4., according to any jet based on electromagnet concussion water flow sensor in claim 1-3, it is characterized in that, the volume of described first electromagnet (5) and the second electromagnet (6) is: long 20mm, wide 15mm, thick 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420832020.0U CN204330037U (en) | 2014-12-24 | 2014-12-24 | A kind of concussion of the jet based on electromagnet water flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420832020.0U CN204330037U (en) | 2014-12-24 | 2014-12-24 | A kind of concussion of the jet based on electromagnet water flow sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204330037U true CN204330037U (en) | 2015-05-13 |
Family
ID=53166387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420832020.0U Expired - Fee Related CN204330037U (en) | 2014-12-24 | 2014-12-24 | A kind of concussion of the jet based on electromagnet water flow sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204330037U (en) |
-
2014
- 2014-12-24 CN CN201420832020.0U patent/CN204330037U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20171224 |
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| CF01 | Termination of patent right due to non-payment of annual fee |