CN2350737Y - Optical fibre liquid level alarm device - Google Patents
Optical fibre liquid level alarm device Download PDFInfo
- Publication number
- CN2350737Y CN2350737Y CN 98234871 CN98234871U CN2350737Y CN 2350737 Y CN2350737 Y CN 2350737Y CN 98234871 CN98234871 CN 98234871 CN 98234871 U CN98234871 U CN 98234871U CN 2350737 Y CN2350737 Y CN 2350737Y
- Authority
- CN
- China
- Prior art keywords
- light
- piquid
- liquid level
- answer
- sensitive 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.)
- Expired - Fee Related
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model relates to an optical fibre liquid level alarm device. A light sending optical fibre and a light returning optical fibre are welded on a triple prism; whether a liquid surface reaches the triple prism can be known through measuring the returned quantity of light according to that difference media have different refractivity of light which passes through the prism, and the intensity of light from the light sending optical fibre is different from the intensity of light which returns to the light returning optical fibre. The device has no electricity on site, and the body of the device is safe; the utility model is especially suitable for measuring the liquid levels of inflammable and explosive liquid.
Description
The utility model relates to the photovoltaic applications technical field, is a kind of liquid level locating device.
Existing liquid level alarm device has mechanical type and electronic sensor to measure formula.Mechanical type employing ball float is surveyed liquid level, drives mechanical driving device generation by ball float and reports to the police, thereby realize the liquid level position warning, and it is poor that this warning device has reliable transmission, shortcomings such as on-the-spot installation difficulty.Electronic sensing type has again near forms such as switch detection and pressure sensing type detections, the electric signal that is produced by sensor is transferred to warning device by lead, the realization liquid level is reported to the police, owing to adopt the electrical measurement mode, there is unsafe factor for some inflammable and explosive liquid such as gasoline, kerosene, ethane, liquefied petroleum gas etc., and signal is subject to disturb, and influences accuracy of measurement.
The purpose of this utility model be design a kind of can accurately measure the liquid levels position and also be easy to install, safe and reliable liquid level alarm device.
The utility model is the improvement of electronic alarm, sensor changes piquid-sensitive head into, piquid-sensitive head is a miniature prism, wherein a seamed edge normal direction and two optical fiber weldings mutually, wherein an optical fiber send light to use, and another optical fiber is made light echo usefulness, when light arrives prism by sending light optical fiber, will pass seamed edge perpendicular to the light vector component of prism hypotenuse and enter prism and project on another seamed edge limit.If this moment, prism was in the gaseous medium, because the radiance of gaseous medium and the radiance of prism material differ greatly, total reflection takes place in the light that enters prism on seamed edge, this time is returned along answer the smooth optic fibre, and this moment, the tail end at answer the smooth optic fibre had very strong light penetration to come out.If prism is in the fluid media, because the refractive index of fluid media and the refractive index of prism material differ very little, the light that enters prism will pass prism and enter liquid and seldom be folded back in the answer the smooth optic fibre, and this moment, the tail end of answer the smooth optic fibre had only very weak light penetration to come out.We know just that by the power of measuring answer the smooth optic fibre tail end light whether prism (piquid-sensitive head) is in the liquid, knows liquid level position thereby declare.
The utility model utilizes light signal to survey liquid level position, and electric signal is on-the-spot away from surveying, and is specially adapted to inflammable and explosive liquid level and measures.Because optical fiber has superior functions such as anticorrosive, anti-electromagnetic interference (EMI), resisting temperature interference, thus the utility model strong interference immunity, essential safety, working stability is reliable, and is simple in structure, the on-the-spot installation easily.
With regard to accompanying drawing the utility model is further described below
Accompanying drawing 1 the utility model synoptic diagram
Accompanying drawing 2 single liquid level indication warning examples
Accompanying drawing 3 biliquid positions indication warning example
1--light emitting devices in the accompanying drawing, 2--send light optical fiber, the piquid-sensitive head of 3--, 4--answer the smooth optic fibre, 5--photoelectric conversion device, the 6--indicating alarm device, 7--liquid, 8--sleeve pipe, 9--cabinet, 10--power switch, 11--oil tank, 12--send light optical fiber B, piquid-sensitive B of 13--, 14--answer the smooth optic fibre B.
Explanation to accompanying drawing 1, piquid-sensitive head (3) is designed to a miniature prism, welding and is sent light optical fiber (2) and answer the smooth optic fibre (4) on one seamed edge of piquid-sensitive head (3), send another termination light emitting devices (1) of light optical fiber (2), another termination photoelectric conversion device (5) of answer the smooth optic fibre (4).During work, light sends from light emitting devices (1), when sending light optical fiber (2) to piquid-sensitive head (3), will pass seamed edge perpendicular to the light vector component of piquid-sensitive head (3) seamed edge and enter piquid-sensitive head (3) and project on another seamed edge of piquid-sensitive head (3).If piquid-sensitive head this moment (3) is in the gaseous medium, because the refractive index of gaseous medium and the refractive index of piquid-sensitive head material differ greatly, total reflection takes place in the light that enters piquid-sensitive head (3) on two seamed edges, this time is returned along answer the smooth optic fibre (4), and the tail end of answer the smooth optic fibre (4) has very strong light to penetrate out.If piquid-sensitive head (3) is in the fluid media, because the refractive index of fluid media and the refractive index of piquid-sensitive head material differ very little, the light that enters piquid-sensitive head (3) will pass seamed edge and enter liquid and seldom be folded back in the answer the smooth optic fibre (4), and the tail end of answer the smooth optic fibre this moment (4) has only very faint light to penetrate out.We know just with the power that photoelectric conversion device (5) is measured answer the smooth optic fibre (4) back light whether piquid-sensitive head (3) is in the liquid, know liquid level position thereby declare, indicating alarm device (6) shows the strong and weak signals of photoelectric conversion device (5) by pilot lamp or sound.
The single liquid level indicating alarm device of example one (accompanying drawing 2)
In the practical application, to send light optical fiber (2) and answer the smooth optic fibre (4) also will insert with an end of piquid-sensitive head (3) in the oil tank (11) with a plastic casing (8) wrapping together, insertion depth is decided on requiring the liquid level position, sleeve pipe (8) is fixed on the oil tank (11), light emitting devices (1), photoelectric conversion device (5) and indicating alarm device (6) an available cabinet (9) usually put together, and also visual operating position is installed respectively.During use, power switch (10) is opened energized.
Light sends from light emitting devices (1), through sending light optical fiber (2) to piquid-sensitive head (3), the piquid-sensitive head of liquid level no show (3) in oil tank this moment (11), piquid-sensitive head (3) is in the gaseous medium, because the refractive index of gaseous medium and the refractive index of piquid-sensitive head material differ greatly, the wide part that enters piquid-sensitive head (3) is reflected in the answer the smooth optic fibre (4), and the light that returns passes to photoelectric conversion device (5) by answer the smooth optic fibre (4), and indicating alarm device (6) indicating liquid does not put in place.
In oil tank (11), add liquid (7), liquid level rises gradually, when liquid level arrives piquid-sensitive head (3), because the liquid refractive index and the refractive index of piquid-sensitive head material differ very little, the wide part that enters piquid-sensitive head (3) is passed entering liquid (7) and seldom being folded back in the answer the smooth optic fibre (4) of piquid-sensitive head (3), what at this moment photoelectric conversion device (5) was received is weak one, and indicating alarm device (6) indication liquid level puts in place and starts warning device.
Example two (accompanying drawing 3) biliquid position indicating alarm device
To send light optical fiber (2), send light optical fiber B (12), answer the smooth optic fibre (4) and answer the smooth optic fibre B (14) be with a plastic casing (8) wrapping together and in will the end insertion oil tank (11) with piquid-sensitive head (3) and piquid-sensitive B (13), last liquid level is by the insertion depth decision of piquid-sensitive head (3), following liquid level is by the insertion depth decision of piquid-sensitive B (13), sleeve pipe (8) is fixed on the oil tank (11), and light emitting devices (1), photoelectric conversion device (5) and warning device (6) are two-pass design and adorn with a cabinet (9) collection.
During use, power switch (10) is opened, energized, light emitting devices (1) is simultaneously to sending light optical fiber (2) and sending light optical fiber B (12) to send light, light arrives piquid-sensitive head (3) and piquid-sensitive B (13) respectively, piquid-sensitive B of liquid level no show (13) in oil tank this moment (11), piquid-sensitive head (3) and piquid-sensitive B (13) all are in the gaseous medium, the wide part that enters piquid-sensitive head (3) turns back to photoelectric conversion device (5) along answer the smooth optic fibre (4), enter piquid-sensitive B (13)) wide part turn back to photoelectric conversion device (5) along answer the smooth optic fibre B (14), indicating alarm device (6) indication liquid level does not up and down all put in place.
In oil tank (11), add liquid (7), liquid level rises gradually, when liquid level arrives piquid-sensitive B (13), the wide part that enters piquid-sensitive B (13) is passed piquid-sensitive B (13) and is entered in the liquid (7) and seldom be folded back answer the smooth optic fibre B (14), at this moment photoelectric conversion device (5) the following liquid level loop of receiving is a weak one, indicating alarm device (6) indication liquid level down puts in place, and last liquid level path at this moment still is in the previous state that do not put in place.
In oil tank (11), add liquid (7) again, liquid level continues to rise, when liquid level arrives piquid-sensitive head (3), the wide part that enters piquid-sensitive head (3) pass piquid-sensitive head (3) enter in the liquid (7) and seldom be folded back answer the smooth optic fibre (4), at this moment photoelectric conversion device (5) the last liquid level loop of receiving is a weak one, liquid level puts in place in indicating alarm device (6) indication, and sends warning.
Above-mentioned liquid level indication warning example increases automatic control section, can realize automatic liquid level control.
Claims (1)
1, fibre optic liquid level alarm, by light emitting devices (1), send light optical fiber (2), piquid-sensitive head (3), answer the smooth optic fibre (4), photoelectric conversion device (5) and indicating alarm device (6) to be constituted, it is characterized in that: piquid-sensitive head (3) is a miniature prism, light optical fiber (2) and answer the smooth optic fibre (4) are sent in one seamed edge welding of piquid-sensitive head (3), send the other end of light optical fiber (2) to receive light emitting devices (1), another termination photoelectric conversion device (5) of answer the smooth optic fibre (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98234871 CN2350737Y (en) | 1998-08-14 | 1998-08-14 | Optical fibre liquid level alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98234871 CN2350737Y (en) | 1998-08-14 | 1998-08-14 | Optical fibre liquid level alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2350737Y true CN2350737Y (en) | 1999-11-24 |
Family
ID=33983296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98234871 Expired - Fee Related CN2350737Y (en) | 1998-08-14 | 1998-08-14 | Optical fibre liquid level alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2350737Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1997312B (en) * | 2004-06-24 | 2011-04-13 | 瑞德森斯医药马耳他有限公司 | Means and method for detection of blood leakage from wounds |
| CN102530446A (en) * | 2011-12-08 | 2012-07-04 | 飞秒光电科技(西安)有限公司 | Oil leakage detecting device for oil tank |
| CN102564529A (en) * | 2011-12-08 | 2012-07-11 | 飞秒光电科技(西安)有限公司 | Automatic water inlet detection device of outdoor cabinet |
| CN106510628A (en) * | 2016-11-22 | 2017-03-22 | 李汶汶 | Blood exosmosis monitoring instrument |
-
1998
- 1998-08-14 CN CN 98234871 patent/CN2350737Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1997312B (en) * | 2004-06-24 | 2011-04-13 | 瑞德森斯医药马耳他有限公司 | Means and method for detection of blood leakage from wounds |
| CN102530446A (en) * | 2011-12-08 | 2012-07-04 | 飞秒光电科技(西安)有限公司 | Oil leakage detecting device for oil tank |
| CN102564529A (en) * | 2011-12-08 | 2012-07-11 | 飞秒光电科技(西安)有限公司 | Automatic water inlet detection device of outdoor cabinet |
| CN106510628A (en) * | 2016-11-22 | 2017-03-22 | 李汶汶 | Blood exosmosis monitoring instrument |
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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 |