CN203825757U - Optical fiber anti-intrusion sensing device - Google Patents
Optical fiber anti-intrusion sensing device Download PDFInfo
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- CN203825757U CN203825757U CN201420098801.1U CN201420098801U CN203825757U CN 203825757 U CN203825757 U CN 203825757U CN 201420098801 U CN201420098801 U CN 201420098801U CN 203825757 U CN203825757 U CN 203825757U
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 77
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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Abstract
The utility model discloses an optical fiber anti-intrusion sensing device, which comprises a light source, a shunting unit, a photoelectric conversion unit, an analysis unit and an optical fiber, wherein the light source emits measurement light and the light is incident to the shunting unit; the shunting unit is used for transmitting the measurement light to the optical fiber and receives light returning along the optical fiber; the photoelectric conversion unit is used for receiving the light sent by the shunting unit and returning along the optical fiber and converting the light into electrical signals; the analysis unit is used for analyzing the electrical signals transmitted by the photoelectric conversion unit and judging whether the area where the optical fiber is laid is intruded, and an alarming signal is sent if the area is intruded; and the optical fiber is used for transmitting the measurement light and the light returning along the optical fiber. According to the optical fiber anti-intrusion sensing device, a passive device is provided outdoors, no power supply is needed for providing power, and problems of outdoor power supply, lightning and strong electromagnetic interference can be solved; installation of the optical fiber does not need to be precisely aligned, and an alarming signal can be generated as long as an object triggers the optical fiber or optical fiber vibration is generated by an object around the optical fiber; and the device is simple in structure and technical p[principle, convenient in use, low in cost, and is suitable for production and application.
Description
Technical field
The utility model relates to technical field of optical fiber sensing, particularly relates to the anti-intrusion sensing device of a kind of optical fiber.
Background technology
Be applied at present the anti-intrusion alarm sensing devices such as residential quarters, border, electric power, oil and mostly be infrared emission warning, its ultimate principle is infrared emission collector transmitting infrared light on one side, the infrared reception collector of another side receives infrared light, if there is object process centre, and infrared light is blocked completely, receiving end will produce alerting signal because receiving infrared light.The shortcoming of this warning device is that both sides collector all needs power supply, monitoring distance is determined by infrared emission tube power, transmitting and receiving collector needs accurate contraposition, produces false alarm otherwise easily do not cause because infrared light receives, and outdoor charged collector is subject to lightning impulse impact; Due to the limitation of above factor, cause this device can not be applied in long distance, the severe and outdoor place that power supply cannot be provided of electromagnetic environment, and vibrating intruding (as digging wall etc.) that can not surveyed area, outdoor also cause infrared light to depart from because expose to wind and rain or causes sensing device cisco unity malfunction etc. because of thunder and lightning.
Utility model content
Based on above-mentioned situation, the utility model proposes the anti-intrusion sensing device of a kind of optical fiber, Measurement sensibility is good, precision is high, simple in structure, and cost is low, is convenient to practical application.
To achieve these goals, the technical solution of the utility model is:
The anti-intrusion sensing device of a kind of optical fiber, comprising:
Light source, for sending measurement light, described measurement light incides branching unit;
Branching unit, for transmitting described measurement light to optical fiber, and receives the light returning along described optical fiber;
Photoelectric conversion unit, the light returning along described optical fiber sending for receiving described branching unit, and be converted to electric signal;
Analytic unit, the described electric signal sending for analyzing described photoelectric conversion unit, judges that whether described optical fiber laying work area is invaded, if invaded, sends alerting signal;
Optical fiber, for the light that transmits described measurement light, returns along described optical fiber.
Compared with prior art, the beneficial effects of the utility model are: the anti-intrusion sensing device of the utility model optical fiber, and open air is optical fiber and indivedual optical device, for passive device, without Power supply, solve outdoor power system problem, and be not subject to outdoor thunder and lightning and the impact of strong electromagnetic; The installation of optical fiber is without accurate contraposition, cause fiber-optic vibration as long as there is the object around object shake-up optical fiber or optical fiber, all can cause alerting signal, not only there is the warning effect that infrared mode produces, and solve the warning problem (as digging wall etc.) due to generation of vibration; Apparatus structure and know-why are simple, easy to use, with low cost, are applicable to batch production and application.
Brief description of the drawings
Fig. 1 is the structural representation of the anti-intrusion sensing device of optical fiber in an embodiment;
Fig. 2 is the light path schematic diagram of the anti-intrusion sensing device of optical fiber in an embodiment;
Fig. 3 is the circuit diagram of the anti-intrusion sensing device of optical fiber in an embodiment;
Fig. 4 is amplifying circuit and filtering circuit schematic diagram in the anti-intrusion sensing device of optical fiber in an embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is described in further detail.Should be appreciated that embodiment described herein, only in order to explain the utility model, does not limit protection domain of the present utility model.
The anti-intrusion sensing device of optical fiber in an embodiment, as shown in Figure 1, comprising:
Light source, for sending measurement light, described measurement light incides branching unit;
Branching unit, for transmitting described measurement light to optical fiber, and receives the light returning along described optical fiber;
Photoelectric conversion unit, the light returning along described optical fiber sending for receiving described branching unit, and be converted to electric signal;
Analytic unit, the described electric signal sending for analyzing described photoelectric conversion unit, judges that whether described optical fiber laying work area is invaded, if invaded, sends alerting signal;
Optical fiber, for the light that transmits described measurement light, returns along described optical fiber.
As shown in Figure 1, this preferred embodiment of installing each module annexation is: light source output terminal connects branching unit input end, branching unit output terminal connects photoelectric conversion unit input end, and branching unit connects optical fiber, photoelectric conversion unit output terminal linking parsing unit input end.
If optical fiber is not touched (not invading signal), the electric signal that photoelectric conversion unit is converted to is constant direct current signal, once optical fiber is touched, can there is deformation in optical fiber, these deformation meetings cause the refraction feature of optical fiber to change, cause refraction and the reflection of light that of short duration variation occurs, thereby cause the light intensity that enters photoelectric conversion unit that of short duration variation occurs, this variation is after photoelectric conversion unit is converted to electric signal, determine whether as effective alerting signal by analytic unit again, if so, send alerting signal.
Known from the above description, the utility model is simple in structure, and stable performance is cheap, is applicable to application.
As an embodiment preferably, described branching unit comprises 1X2 optical branching device, and 1/2 of the described measurement light that described 1X2 optical branching device sends described light source sends described optical fiber to, and receive the light that returns along described optical fiber, 1X2 optical branching device is simple in structure, and low price is applicable to practical application.
As an embodiment preferably, described analytic unit comprises the AD sampling unit, CPU processing unit and the alarm unit that connect successively, the described electric signal that described AD sampling unit sends described photoelectric conversion unit is converted to digital signal, described CPU processing unit judges according to described digital signal whether described optical fiber laying work area is invaded, if invaded, starts alarm unit, send alerting signal, computing method are simple, and result is accurate, and stability is high.
As an embodiment preferably, described analytic unit also comprises amplifying unit, described amplifying unit is connected between described photoelectric conversion unit and AD sampling unit, the described electric signal that described photoelectric conversion unit is sent amplifies, faint electric signal is amplified to the decay in compensating signal transmittance process.
As an embodiment preferably, described analytic unit also comprises filter unit, described filter unit is connected between described amplifying unit and AD sampling unit, the electric signal of the amplification that described amplifying unit is sent filters, frequency beyond frequency to characteristic frequency or this frequency is carried out effective filtering as required, obtains a specific frequency or eliminates a specific frequency.
As an embodiment preferably, described optical fiber is single-mode fiber, and the versatility that uses single-mode fiber to increase system also greatly reduces the cost of product.
In order to understand better this device, below elaborate the application example of several devices:
As Fig. 2, shown in Fig. 3, in an embodiment, the anti-intrusion sensing device of optical fiber is made up of light path and circuit two parts, the light that the light source P of light path sends through 1X2 optical branching device laggard enter optical fiber L, after catoptron F reflection, return along optical fiber L, be divided into two bundles through shunt again, wherein a branch of photodiode PD that enters, as alarm detection signal, if optical fiber is not touched (not invading signal), light signal is converted to constant direct current signal through photodiode PD, once optical fiber is touched, can there is deformation in optical fiber, these deformation meetings cause the refraction feature of optical fiber to change, cause refraction and the reflection of light that of short duration variation occurs, thereby cause the light intensity that enters photodiode PD that of short duration variation occurs, this variation is converted into after electric signal, amplified by amplifying circuit, filtering circuit filters, AD sample circuit is transformed into digital signal, process and determine whether as effective alerting signal by CPU, if, start warning circuit, send alerting signal.
This device light path simple in structure, adopts again general optical device, has greatly reduced buying and production cost, and wherein optical fiber adopts general single mode fiber, and the versatility that increases system also greatly reduces the cost of product; System except optical branching device, optical fiber and end reflector out of doors, light source and circuit part all can be arranged on indoor, because optical fiber is passive device, therefore be not subject to the impact of outdoor thunder and lightning and electromagnetic interference (EMI), reliability improve.
As shown in Figure 4, amplifying circuit and filtering circuit schematic diagram in the anti-intrusion sensing device of optical fiber in an embodiment, wherein D1 is photodiode, the elementary amplifying circuit of one of them amplifier of comparer U1 and resistance R A1 composition photosignal, another amplifier and the resistance R 2 that enter U2 through the follower of one of them amplifier composition of comparer U2, the prime amplifier of R3 composition, after cutting off direct current, electric capacity E1 is coupled to the 2nd pin of resistance R 4, by by resistance R 4, R5, R6 and capacitor C 3, after the low-pass filter filtering of C4 composition, enter another amplifier by comparer U1, after the post-amplifier of resistance R 1 and R8 composition amplifies, enter AD sample circuit and carry out analog to digital conversion, structure and know-why are simple, device is general-purpose device, with low cost.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (6)
1. the anti-intrusion sensing device of optical fiber, is characterized in that, comprising:
Light source, for sending measurement light, described measurement light incides branching unit;
Branching unit, for transmitting described measurement light to optical fiber, and receives the light returning along described optical fiber;
Photoelectric conversion unit, the light returning along described optical fiber sending for receiving described branching unit, and be converted to electric signal;
Analytic unit, the described electric signal sending for analyzing described photoelectric conversion unit, judges that whether described optical fiber laying work area is invaded, if invaded, sends alerting signal;
Optical fiber, for the light that transmits described measurement light, returns along described optical fiber.
2. the anti-intrusion sensing device of optical fiber according to claim 1, it is characterized in that, described branching unit comprises 1X2 optical branching device, and 1/2 of the described measurement light that described 1X2 optical branching device sends described light source sends described optical fiber to, and receives the light returning along described optical fiber.
3. the anti-intrusion sensing device of optical fiber according to claim 1, it is characterized in that, described analytic unit comprises the AD sampling unit, CPU processing unit and the alarm unit that connect successively, the described electric signal that described AD sampling unit sends described photoelectric conversion unit is converted to digital signal, described CPU processing unit judges according to described digital signal whether described optical fiber laying work area is invaded, if invaded, start alarm unit, send alerting signal.
4. the anti-intrusion sensing device of optical fiber according to claim 3, it is characterized in that, described analytic unit also comprises amplifying unit, and described amplifying unit is connected between described photoelectric conversion unit and AD sampling unit, and the described electric signal that described photoelectric conversion unit is sent amplifies.
5. the anti-intrusion sensing device of optical fiber according to claim 4, it is characterized in that, described analytic unit also comprises filter unit, and described filter unit is connected between described amplifying unit and AD sampling unit, and the electric signal of the amplification that described amplifying unit is sent filters.
6. the anti-intrusion sensing device of optical fiber according to claim 1, is characterized in that, described optical fiber is single-mode fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420098801.1U CN203825757U (en) | 2014-03-05 | 2014-03-05 | Optical fiber anti-intrusion sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420098801.1U CN203825757U (en) | 2014-03-05 | 2014-03-05 | Optical fiber anti-intrusion sensing device |
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| CN203825757U true CN203825757U (en) | 2014-09-10 |
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| CN201420098801.1U Expired - Fee Related CN203825757U (en) | 2014-03-05 | 2014-03-05 | Optical fiber anti-intrusion sensing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727124A (en) * | 2017-08-31 | 2018-02-23 | 电子科技大学 | The circumference invasion detection method perceived based on optical fiber |
| CN108230595A (en) * | 2018-01-05 | 2018-06-29 | 佛山市新东方电子技术工程有限公司 | A kind of anti-intrusion warning device and system |
-
2014
- 2014-03-05 CN CN201420098801.1U patent/CN203825757U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727124A (en) * | 2017-08-31 | 2018-02-23 | 电子科技大学 | The circumference invasion detection method perceived based on optical fiber |
| CN108230595A (en) * | 2018-01-05 | 2018-06-29 | 佛山市新东方电子技术工程有限公司 | A kind of anti-intrusion warning device and system |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 |