CN214039913U - Deformation self-detection and alarm system for highway guardrail - Google Patents
Deformation self-detection and alarm system for highway guardrail Download PDFInfo
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- CN214039913U CN214039913U CN202023285628.0U CN202023285628U CN214039913U CN 214039913 U CN214039913 U CN 214039913U CN 202023285628 U CN202023285628 U CN 202023285628U CN 214039913 U CN214039913 U CN 214039913U
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- 238000001514 detection method Methods 0.000 title claims description 13
- 239000013307 optical fiber Substances 0.000 claims abstract description 45
- 230000000007 visual effect Effects 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 claims abstract description 4
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 5
- 230000003595 spectral effect Effects 0.000 abstract description 2
- 239000000470 constituent Substances 0.000 description 14
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 206010010071 Coma Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a highway guardrail warp self-detecting and alarm system, include: the device comprises a modulation and demodulation instrument, a distributed optical fiber, an upper computer and an audible and visual alarm; the distributed optical fiber is attached to a roadside guardrail of the highway; the output end of the distributed optical fiber is connected to the modem, the output end of the modem is connected to an upper computer, and the upper computer is connected with the audible and visual alarm. The utility model discloses utilize the dress of subsides to detect optic fibre strain distribution at the distributed optical fiber of one side guardrail of highway through spectral change to detect out the deformation of guardrail, carry out automatic alarm according to setting for the threshold value and have simple structure, lay the cost relatively lower, do not receive advantages such as the influence of climatic conditions.
Description
Technical Field
The utility model relates to a collision detection area, concretely relates to highway guardrail warp self-detecting and alarm system.
Background
The accident that the vehicle collides with the roadside guardrail of the expressway can cause the guardrail to be damaged, if the accident site is not timely and effectively treated, the secondary accident is easily caused. At present, the highway management center acquires the accident information of the highway mainly by the drivers and passengers of accident vehicles or other people for alarming, and the automatic accident detection and alarm capability is lacked. If the drivers and passengers of the accident vehicles are in a coma, or the accident site is far away, and the accident time is in rare driving conditions such as at night, the highway management center cannot acquire the road accident information in time. If the current common video monitoring and automatic identification technology is adopted to carry out automatic accident detection and alarm, the system has the defects of large number of required devices, high system layout cost, large data transmission quantity, high possibility of being greatly influenced by weather and surrounding environment and the like.
When the roadside guardrail of the highway has problems due to other non-accident reasons such as road settlement, if the roadside guardrail is not maintained in time, hidden dangers are brought to the driving safety of the highway.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a highway guardrail warp self-detecting and alarm system realizes through following technical scheme:
a deformation self-detection and alarm system for a highway guardrail comprises: the device comprises a modulation and demodulation instrument, a distributed optical fiber, an upper computer and an audible and visual alarm;
the distributed optical fiber is attached to a roadside guardrail of the highway;
the output end of the distributed optical fiber is connected to the modem, the output end of the modem is connected to an upper computer, and the upper computer is connected with the audible and visual alarm.
The beneficial effects of the scheme are that the distributed optical fiber attached to the guardrail on one side of the highway is utilized to detect the strain distribution of the optical fiber through the spectral change, so that the deformation of the guardrail is detected, and automatic alarm is carried out according to the set threshold value.
Further, the modem comprises a laser generator, a pulse modulation amplifier, a fiber circulator, a coupler, a photoelectric detector and a mixer, wherein,
the laser generator outputs detection light which sequentially passes through the pulse modulation amplifier, the optical fiber circulator and the coupler and directly outputs reference light to the coupler;
and the output signal of the coupler is output to an upper computer through the photoelectric detector and the frequency mixer in sequence.
The further scheme has the advantages that when the optical fiber is stretched or compressed, the frequency drift of backward Brillouin scattering light can be caused by stress change, and strain measurement can be realized by demodulating the drift amount.
Furthermore, the input end of the frequency mixer is also connected with a frequency mixing electric signal.
The distributed optical fibers are distributed along the guardrail of the highway in sections, and the distributed optical fibers are connected end to form a distributed signal transmission line and are connected to the optical fiber loop.
The beneficial effect of the above further scheme is that the highway guardrail at the current section can be positioned by the multi-section distributed optical fiber, and a basis is provided for the upper computer to accurately warn accident points.
Furthermore, the distributed optical fibers are buried in the roadbed at the opening of the guardrail.
The beneficial effect of above-mentioned further scheme is, detect the possibility of collision accident through road bed deformation at the guardrail opening part.
Further, the light source of the laser generator adopts a narrow linewidth light source.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is the utility model discloses highway guardrail warp self-checking and alarm system schematic structure.
Reference numbers and corresponding part names in the drawings:
1. a laser generator; 2. a pulse-conditioning amplifier; 3. a fiber optic circulator; 4. a coupler; 5. a photodetector; 6. a mixer; 7. a distributed optical fiber; 8. a host computer; 9. an audible and visual alarm.
Detailed Description
Hereinafter, the terms "include" or "may include" used in various embodiments of the present invention indicate the existence of the functions, operations or elements of the present invention, and do not limit the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to refer only to the particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combination of the foregoing.
In various embodiments of the present invention, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
A highway barrier deformation self-detection and alarm system, as shown in fig. 1, comprising: the device comprises a modulation and demodulation instrument, a distributed optical fiber, an upper computer and an audible and visual alarm;
the distributed optical fiber is attached to a roadside guardrail of the highway;
the output end of the distributed optical fiber is connected to the modem, the output end of the modem is connected to an upper computer, and the upper computer is connected with the audible and visual alarm.
In particular, the method of manufacturing a semiconductor device,
the modulation and demodulation instrument comprises a laser generator, a pulse modulation amplifier, an optical fiber circulator, a coupler, a photoelectric detector and a mixer, wherein,
the laser generator outputs detection light which sequentially passes through the pulse modulation amplifier, the optical fiber circulator and the coupler and directly outputs reference light to the coupler;
the output signal of the coupler is output to an upper computer through a photoelectric detector and a frequency mixer in sequence, and the input end of the frequency mixer is also connected with a frequency mixing electric signal.
The detection light generated by the laser is modulated by the pulse modulator and then injected from one end of the optical fiber by the optical fiber circulator, and the rotary Brillouin backscattered light is coupled by the optical fiber circulator and the reference light generated by the laser through the coupler, is output by the photoelectric detector, is mixed with the mixing electric signal, outputs the related signal, converts the related signal and sends the signal to the host computer.
For the embodiment, the distributed optical fibers are distributed along the highway guardrail in sections, and a plurality of sections of distributed optical fibers are connected end to form a distributed signal transmission line and are connected to the optical fiber loop device, and are buried in the roadbed at the opening of the guardrail. Laser is injected from one end of the optical fiber, when the optical fiber is stretched or compressed, the frequency drift of backward Brillouin scattering light can be caused by stress change, and strain measurement can be realized by demodulating the drift amount. According to known raw data such as Brillouin frequency shift, gain spectrum and the like, a distributed result of strain can be calculated, incident light in the optical fiber distributed sensing is a rectangular light pulse, and the Brillouin spectrum is expressed as follows:
in the formula: g01 and g02 are lorentz and gaussian model brillouin gain peaks respectively, and g0 ═ g01+ g02 are peak gains; Δ vB and vB are the line width and brillouin frequency shift, respectively; gB is the gain; v is the frequency.
The frequency corresponding to the spectrum peak is called Brillouin frequency shift, and the temperature and the strain of the optical fiber and the Brillouin frequency shift are in a linear relation, and the formula is as follows:
vB＝CvTΔT+CvεΔε+vBO
in the formula: CvT and Cv epsilon are temperature and strain sensitive coefficients respectively; Δ T and Δ ∈ are the amount of change in temperature and strain, respectively; vBO is the Brillouin frequency shift at the base temperature and strain. Therefore, the temperature or strain in the optical fiber can be analyzed based on the temperature and strain sensitive coefficient, the brillouin frequency shift under the reference condition, and the measured brillouin frequency shift. In this application, the strain of the optical fiber is mainly analyzed.
The testing distance of a single optical cable can reach more than 100 kilometers, and the positioning accuracy of the strain point position is between 1 and 20 meters.
The light source of the laser generator adopts a narrow linewidth light source.
For the embodiment, a Mapinfo system is built in the host computer, a highway route map and kilometers posts are corresponding to the positions of the installed distributed optical fibers in the system, and when deformation occurs, the sound-generating deformation positions are displayed through the computer and correspond to accident sites in a road network.
The strain alarm threshold value of the distributed optical fiber is 6cm, measured optical fiber strain data are input into an upper computer, alarm points are mapped to a Mapinfo system according to the strain alarm threshold value, flashing marks appear at accident points, kilometer signs and hundred-meter pile numbers closest to the accident points are displayed, meanwhile, alarm signals are output, and an audible and visual alarm gives out an alarm.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The utility model provides a highway guardrail warp self-detecting and alarm system which characterized in that includes: the device comprises a modulation and demodulation instrument, a distributed optical fiber, an upper computer and an audible and visual alarm;
the distributed optical fiber is attached to a roadside guardrail of the highway;
the output end of the distributed optical fiber is connected to the modem, the output end of the modem is connected to an upper computer, and the upper computer is connected with the audible and visual alarm.
2. The deformation self-detecting and alarming system for the highway guardrail of claim 1, wherein the modem comprises a laser generator, a pulse modulation amplifier, a fiber optic circulator, a coupler, a photoelectric detector and a mixer, wherein,
the laser generator outputs detection light which sequentially passes through the pulse modulation amplifier, the optical fiber circulator and the coupler and directly outputs reference light to the coupler;
and the output signal of the coupler is output to an upper computer through the photoelectric detector and the frequency mixer in sequence.
3. The system of claim 2, wherein the input end of the mixer is further connected to a mixing electric signal.
4. The highway guardrail deformation self-detection and alarm system of claim 3, wherein the distributed optical fibers are arranged along the highway guardrail in sections, and a plurality of sections of the distributed optical fibers are connected end to form a distributed signal transmission line and are connected to the optical fiber loop.
5. The system of claim 4, wherein the distributed optical fiber is embedded in a roadbed at the opening of the guardrail.
6. The deformation self-detection and alarm system for highway guardrails according to claim 2, wherein the light source of the laser generator is a narrow line width light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202023285628.0U CN214039913U (en) | 2020-12-30 | 2020-12-30 | Deformation self-detection and alarm system for highway guardrail |
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| CN202023285628.0U CN214039913U (en) | 2020-12-30 | 2020-12-30 | Deformation self-detection and alarm system for highway guardrail |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113870578A (en) * | 2021-11-02 | 2021-12-31 | 陆航安防工程(上海)股份有限公司 | Road guardrail intelligent detection system and detection method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113870578A (en) * | 2021-11-02 | 2021-12-31 | 陆航安防工程(上海)股份有限公司 | Road guardrail intelligent detection system and detection method thereof |
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