CN201110899Y - Optical fiber type icing sensor - Google Patents
Optical fiber type icing sensor Download PDFInfo
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- CN201110899Y CN201110899Y CNU2007200884027U CN200720088402U CN201110899Y CN 201110899 Y CN201110899 Y CN 201110899Y CN U2007200884027 U CNU2007200884027 U CN U2007200884027U CN 200720088402 U CN200720088402 U CN 200720088402U CN 201110899 Y CN201110899 Y CN 201110899Y
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- optical fiber
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Abstract
A fiber ice sensor belongs to a photoelectric sensor, which is used for detecting the icing condition on the surface of an object and aims at providing a sensor with small size, light weight, good sensitivity, smallest of better detection limit bound, no sensitive materials, low production cost and simple signal processing. The end parts of the emitting optical fiber beam and the receiving optical fiber beam of the utility model are combined as a focused optical fiber beam whose end face composes the end face of a probe head; an emitting circuit is arranged on the other end of the emitting optical fiber beam; a signal detecting circuit is arranged on the other end of the receiving optical fiber beam; the signal detecting circuit is composed of a photodiode and a pre-amplifier which are connected in series. The photoelectric sensor of the utility model has the advantages of small size, light weight, multi-point distribution, good electromagnetic compatibility, no movable accessories, high reliability and simple signal processing, which is applied to the detection of icing conditions on the surface of the object.
Description
Technical field
The utility model belongs to photoelectric sensor, is specifically related to a kind of fibre-optical freezing sensor, is used for the body surface situation of freezing is detected.
Background technology
Be used for the icing freezing sensor of surveying of aircraft at present many deficiencies are arranged: the radioactive ray formula is healthy harmful to human body; Conductivity formula reliability is relatively poor; The differential pressure type volume is big, complex structure.And these several freezing sensors all can not provide the quantitative information about the order of severity of freezing.Nearest magnetostrictive vibration movable barrel type and the piezoelectric resonant diaphragm type freezing sensor that occurs, can provide the quantitative information of the order of severity of freezing in certain ice thickness scope, but magnetostrictive vibration movable barrel type freezing sensor volume and weight is bigger, complex structure, the production cost height can only be installed on the fuselage part, can not flush conformal and be installed on some position of aircraft, as the leading edge of a wing, and minimum detection limit also unsatisfactory (external 0.254mm, the domestic 0.300mm that is about).Though piezoelectric resonant diaphragm type freezing sensor volume, weight are less, can flush conformal and be installed on machine top-surface camber position, minimum detection limit performance reaches about 0.10mm, better than magnetostrictive vibration movable barrel type, but tighter to the sensitive material requirement, production cost is higher, the signal Processing more complicated.
Summary of the invention
The utility model provides a kind of fibre-optical freezing sensor, and purpose is can be more microminiaturized, and weight is lighter, and it is better that sensitivity and minimum detect the lower limit performance, does not need sensitive material simultaneously, and production cost is lower, and signal Processing is fairly simple.
A kind of fibre-optical freezing sensor of the present utility model comprises the launching fiber bundle and receives fibre bundle, it is characterized in that: described launching fiber bundle is with the reception optical fiber bundle end portion and become to concentrate fibre bundle, concentrates the end face of fibre bundle to constitute the detecting head end face; The launching fiber bundle other end is equipped with radiating circuit, receives the fibre bundle other end signal deteching circuit is housed, and signal deteching circuit is composed in series by photodiode and pre-amplification circuit.
Described fibre-optical freezing sensor is characterized in that: launching fiber bundle and reception fibre bundle distribute for evenly distribution at random, concentric circles distribution or semicircle at the end face distribution form of concentrating fibre bundle.
Described fibre-optical freezing sensor is characterized in that: the profile of described detecting head end face is a helicitic texture; Described launching fiber bundle and reception optical fiber bundle end portion are equipped with the connector of threaded structure, are used for connecting respectively radiating circuit and signal deteching circuit.
Launching fiber bundle and reception optical fiber bundle end portion merge formation Y type conduction fibre bundle, constitute basic structure of the present utility model, concentrate the end face formation detecting head end face of fibre bundle, screw in the testee surface.Do not have when testee surface and to freeze when taking place, the emission light of luminescent device along the launching fiber bundle, concentrate the fibre bundle transmission and inject air by the detecting head end face, photodiode is surveyed less than any emission light.When the testee surface has ice to form, emission light produces phenomenons such as reflected light, scattered light and radiative transmission, absorption in ice sheet, the reflected light of ice sheet-air interface wherein and the part scattered light in ice sheet enter the reception fibre bundle through the detecting head end face, photodiode will receive the luminous energy that fibre bundle obtains and convert electric current in the signal deteching circuit, and be enlarged into voltage signal through the pre-amplification circuit conversion.In certain ice thickness scope, the size of this voltage signal is for being good single-valued function relation with ice thickness, just can realize detection to ice layer thickness so obtained voltage signal.
The utility model size is little, and is in light weight, but the multiple spot distribution, Electro Magnetic Compatibility is better, does not have movable annex, the reliability height, and signal Processing is simple; Be applicable to the body surface situation of freezing is detected.
Description of drawings
Fig. 1 is a schematic diagram of the present utility model;
Fig. 2 is a circuit part schematic diagram of the present utility model;
Fig. 3 is the structural map of the utility model embodiment;
Fig. 4 is the end face structure vertical view of the utility model embodiment, and launching fiber bundle and reception fibre bundle distribute at the end face concentric circles of concentrating fibre bundle;
Fig. 5 is the launching fiber bundle and receives fibre bundle at the equally distributed at random enforcement state of end face of concentrating fibre bundle;
Fig. 6 is the launching fiber bundle and receives the enforcement state that fibre bundle distributes at the end face semicircle of concentrating fibre bundle.
Embodiment
Now the utility model is specified in conjunction with Fig. 1 to Fig. 4.
In Fig. 1, launching fiber bundle 7 with receive fibre bundle 4 ends and become to concentrate fibre bundle 8, its end face formation detecting head end face 3, its contour structures are one metal threaded, are convenient to screw in testee surface 2 and reach and flush the installation purpose.Luminescent device 6 operation wavelengths are near infrared in the radiating circuit, with the interference of the visible light in the elimination bias light to testing circuit.Do not have when testee surface 2 and to freeze when taking place, the emission light of luminescent device 6 along launching fiber bundle 7, concentrate fibre bundle 8 transmission and inject air by detecting head end face 3, photodiode 5 is surveyed less than any emission light.When testee surface 2 has ice to form, emission light produces the reflected light shown in RL among the figure in ice sheet 1, with the scattered light shown in SL among the figure, and phenomenon such as radiative transmission, absorption, the reflected light of ice sheet-air interface wherein and the part scattered light in ice sheet enter through detecting head end face 3 and receive fibre bundle 4, photodiode 5 will receive the luminous energy that fibre bundle 4 obtained and convert electric current in the signal deteching circuit, and be enlarged into voltage signal through the pre-amplification circuit conversion.
In Fig. 2, comprise the photoelectric detective circuit of photodiode 5, be actually one and convert light to transducer that electric current converts voltage again to.Photodiode 5 will receive the luminous energy that fibre bundle 4 obtained and convert electric current to, and be enlarged into voltage signal Vo through the pre-amplification circuit conversion.
Fig. 3 and Fig. 4 are embodiment of the present utility model, among Fig. 3, and launching fiber bundle jacket 9, the screw thread nominal diameter of connector 10 is 4mm; These embodiment detecting head end face 3 fibre bundles distribute, and employing launching fiber bundle 7 in end face sheath 11 is positioned at the axle center, reception fibre bundle 4 becomes coaxial concentric circles to arrange with it, and the screw thread nominal diameter of end face sheath 11 is 10mm.Utilize the scarp slope of its modulation characteristics curve to measure and can realize higher sensitivity and be convenient to signal Processing, in addition, arranged in co-axial alignment is easy to make, and structural symmetry, and grain direction and tested surface tilt less to its influence.
Launching fiber bundle 7 and reception fibre bundle 4 can also distribute for even at random distribution or semicircle as shown in Figure 6 as shown in Figure 5 at the distribution form of probe end face 3.Concrete distribution form will be taken all factors into consideration the factors such as size restrictions of measuring of ice thickness range, transducer sensitivity and combination of fiber-optic bundle and determine.Among Fig. 4,5,6, the expression launching fiber bundle 7 that oblique line is tilted to the left on the cross section; The expression that oblique line is tilted to the right on the cross section receives fibre bundle 4.
Claims (3)
1. a fibre-optical freezing sensor comprises the launching fiber bundle and receives fibre bundle, it is characterized in that: described launching fiber bundle is with the reception optical fiber bundle end portion and become to concentrate fibre bundle, concentrates the end face of fibre bundle to constitute the detecting head end face; The launching fiber bundle other end is equipped with radiating circuit, receives the fibre bundle other end signal deteching circuit is housed, and signal deteching circuit is composed in series by photodiode and pre-amplification circuit.
2. fibre-optical freezing sensor as claimed in claim 1 is characterized in that: launching fiber bundle and reception fibre bundle distribute for evenly distribution at random, concentric circles distribution or semicircle at the end face distribution form of concentrating fibre bundle.
3. fibre-optical freezing sensor as claimed in claim 1 or 2 is characterized in that: the profile of described detecting head end face is a helicitic texture; Described launching fiber bundle and reception optical fiber bundle end portion are equipped with the connector of threaded structure, are used for connecting respectively radiating circuit and signal deteching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200884027U CN201110899Y (en) | 2007-11-23 | 2007-11-23 | Optical fiber type icing sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200884027U CN201110899Y (en) | 2007-11-23 | 2007-11-23 | Optical fiber type icing sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201110899Y true CN201110899Y (en) | 2008-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200884027U Expired - Fee Related CN201110899Y (en) | 2007-11-23 | 2007-11-23 | Optical fiber type icing sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201110899Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621280A (en) * | 2017-09-25 | 2018-01-23 | 深圳怡化电脑股份有限公司 | A kind of sensor detector |
| CN110335439A (en) * | 2019-07-18 | 2019-10-15 | 东南大学 | A kind of bituminous pavement high temperature disease and low temperature icing comprehensive pre-warning device and the method for early warning implemented according to comprehensive pre-warning device |
-
2007
- 2007-11-23 CN CNU2007200884027U patent/CN201110899Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621280A (en) * | 2017-09-25 | 2018-01-23 | 深圳怡化电脑股份有限公司 | A kind of sensor detector |
| CN107621280B (en) * | 2017-09-25 | 2024-03-29 | 深圳怡化电脑股份有限公司 | Sensor testing device |
| CN110335439A (en) * | 2019-07-18 | 2019-10-15 | 东南大学 | A kind of bituminous pavement high temperature disease and low temperature icing comprehensive pre-warning device and the method for early warning implemented according to comprehensive pre-warning device |
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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: 20080903 Termination date: 20161123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |