CN1083210A - A kind of method for detecting liquid level and device thereof - Google Patents
A kind of method for detecting liquid level and device thereof Download PDFInfo
- Publication number
- CN1083210A CN1083210A CN 93103961 CN93103961A CN1083210A CN 1083210 A CN1083210 A CN 1083210A CN 93103961 CN93103961 CN 93103961 CN 93103961 A CN93103961 A CN 93103961A CN 1083210 A CN1083210 A CN 1083210A
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- liquid level
- vibrator
- sensor
- interior pipe
- pipe
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
What the present invention relates to is a kind of brand-new method for detecting liquid level and device thereof, especially determines the method and the device of liquid level with vibration frequency or cycle.Method of the present invention is to utilize the vibration frequency ω of the vibrator that does not contact with liquid level and the funtcional relationship of tested liquid level h to measure liquid level.The vibration liquid level gauge that proposes among the present invention is made up of interior pipe, outer tube and the vibrator and the sensor that are installed between the inner and outer pipe.This apparatus structure is simple, measuring accuracy is high, good reliability, work response is fast, and can be applied in many measurement instruments.
Description
What the present invention relates to is a kind of method for detecting liquid level and device thereof, especially determines the method and the device of liquid level with vibration frequency or cycle.
Existing liquid-level detecting method mainly contains following a few class:
1. utilize transparent glass tube Direct observation liquid level position;
2. utilize float to determine liquid level position indirectly;
3. calculate liquid level according to base pressure;
4. utilize ultrasonic technique, determine liquid level according to the sound wave stroke.
The restriction of these detection methods or receptor and mounting condition, accuracy of detection are not high, or sensor directly need be contacted with liquid level, can't adopt under many circumstances, or the instrument structure relative complex, poor reliability.And all these liquid-level detecting methods a common deficiency is arranged is all not to be suitable in the astable system that needs monitoring in real time.
The present invention is directed to above-mentioned deficiency, proposed a kind of method, and it is a kind of simple in structure to utilize the method to design, measuring accuracy height, and the liquid level gauge of the real-time monitoring that can use under any condition with vibration principle mensuration liquid level.
Technical solution of the present invention is to utilize the vibration frequency of the vibrator that does not contact with liquid level or period T to determine tested liquid level h, h and ω
1The pass be h=Kf(ω), wherein k, be conditional coefficient.
The invention provides a kind of vibration liquid level gauge according to above-mentioned principle, it is characterized in that liquid level gauge is made up of interior pipe (1), outer tube (2) and the vibrator (3) and the sensor (4) that are installed between the inner and outer pipe.The toroid winding (3 of vibrator (3) and sensor (4)
1), (4
1) partly connect firmly on the outer wall of interior pipe (1) annular magnetic steel (3 of vibrator (3) and sensor (4)
2), (4
2) be fixed on the inwall of outer tube (2).
The present invention compared with prior art its advantage and good effect is:
(1) vibration principle that utilizes that proposes among the present invention is measured the method for liquid level, is the pioneer invention in this field, and it provides a kind of brand-new method of thinking and technical solution for people.
(2) vibration liquid level meter provided by the invention is measured accurately, and its precision can reach more than 0.1%.
(3) sensor, the vibrator in the vibration liquid level meter do not contact with liquid, therefore can be used for detecting having high corrosion or the very big medium of toxicity, and the medium temperature scope can be between-20 ℃ to 100 ℃.
(4) there is not the device aging problem that takes place in the ultrasonic measurement instrument that resembles, therefore can works reliably and with long-term.
(5) the work response is fast, can accurately catch liquid level in less than 0.1 second time, and therefore can be used in reliably needs in the real-time monitoring system or very unsettled occasion.
(6) measurement mechanism of the present invention can use among other many measurement instruments.And as core component, as the blowdown flow meter.
Description of drawings:
Fig. 1 logic diagram of the present invention
The structural drawing of Fig. 2 pick-up unit of the present invention
Wherein: pipe in the 1-; The 2-outer tube; The 3-vibrator; 3
1-coil; 3
2-annular magnetic steel; The 4-sensor; 4
1-coil; 4
2-annular magnetic steel
Embodiment:
Interior pipe (1) is even thin-wall circular tube, looks concrete condition available metal also useable glass or plastic material making.Outer tube (2) is used to protect interior pipe (1).Vibrator and sensor are formed by annular magnetic steel, coil, are conventional element.Coil 3
1, 4
1Can use carriage, also can use welding, modes such as bolt connection are fixed on the interior pipe (1).During work, upright interior pipe (1) is made resonance with its minimum natural frequency.
Between liquid level h and the frequencies omega, following relation is arranged:
L is the length of interior pipe (1) in the formula, EJ and m
0, be the bendind rigidity and the line density of interior pipe (1), m
0Be the active line density that liquid occupies pipe in the part, M
0With M be respectively adorn on inner pipe vibrator and the quality of sensor element.
Claims (5)
1, a kind of method for detecting liquid level is characterized in that utilizing the vibration frequency ω of the vibrator that does not contact with liquid level or period T to determine tested liquid level h, and the pass of h and ω is h=KF (ω), wherein k, be conditional coefficient.
2, a kind of liquid level sensor of making according to the described method of claim 1 is characterized in that this device is made up of interior pipe (1), outer tube (2) and the vibrator (3) and the sensor (4) that are installed between the inner and outer pipe.
3, liquid level sensor as claimed in claim 2 is characterized in that the toroid winding (3 of vibrator (3) and sensor (4)
1), (4
1) partly connect firmly on the outer wall of interior pipe (1) annular magnetic steel (3 of vibrator (3) and sensor (4)
2), (4
2) be fixed on the inwall of outer tube (2).
4,, it is characterized in that upright interior pipe (1) is a pipe in the even thin-walled, makes resonance with its minimum natural frequency as claim 2 or 3 described liquid level sensors.
5, liquid level sensor as claimed in claim 4 is characterized in that tested liquid level h=KF(ω), wherein K is the length of interior pipe (1), rigidity, the line density of interior pipe (1), the relevant coefficient of quality of vibrator and sensor.Concrete funtcional relationship is:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93103961 CN1083210A (en) | 1993-04-01 | 1993-04-01 | A kind of method for detecting liquid level and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93103961 CN1083210A (en) | 1993-04-01 | 1993-04-01 | A kind of method for detecting liquid level and device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1083210A true CN1083210A (en) | 1994-03-02 |
Family
ID=4984933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93103961 Pending CN1083210A (en) | 1993-04-01 | 1993-04-01 | A kind of method for detecting liquid level and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1083210A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100549714C (en) * | 2004-03-24 | 2009-10-14 | Vega格里沙贝两合公司 | The method of operating tests of vibration level sensors sensor and corresponding vibration level |
| CN113093583A (en) * | 2021-03-01 | 2021-07-09 | 上海化工院检测有限公司 | A multi-functional reagent bottle label for laboratory management |
-
1993
- 1993-04-01 CN CN 93103961 patent/CN1083210A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100549714C (en) * | 2004-03-24 | 2009-10-14 | Vega格里沙贝两合公司 | The method of operating tests of vibration level sensors sensor and corresponding vibration level |
| CN113093583A (en) * | 2021-03-01 | 2021-07-09 | 上海化工院检测有限公司 | A multi-functional reagent bottle label for laboratory management |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |