CN209606320U - All -fiber humidity sensing device - Google Patents
All -fiber humidity sensing device Download PDFInfo
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- CN209606320U CN209606320U CN201920183618.4U CN201920183618U CN209606320U CN 209606320 U CN209606320 U CN 209606320U CN 201920183618 U CN201920183618 U CN 201920183618U CN 209606320 U CN209606320 U CN 209606320U
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- humidity sensing
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Abstract
The utility model provides a kind of all -fiber humidity sensing device, including light source emitter part, detection fiber and light receiving element, light source emitter part and the input terminal of detection fiber connect, the output end of detection fiber is connect with light receiving element, and detection fiber receives the detection optical signal from light source emitter part and sends humidity light signal fed back to light receiving element；Detection fiber is provided with test section, and test section includes naked fibre and the wet sensitive photorefractive material being wrapped in outside naked fibre.Humidity Detection can be realized in forbidding power utilization environment using the utility model, and cost is relatively low.
Description
Technical field
The utility model relates to technical field of optical fiber sensing, specifically, being related to a kind of all -fiber humidity sensing device.
Background technique
In many high alternating electric fields, inflammable and explosive, chemical environment, some people require ambient humidity to be able to carry out in real time
Measurement, while being also required to low cost and solving the problems, such as this measuring moisture.
Generally for the moisture measurement of this kind of environment, a variety of methods can be used to realize.Some is using humistor
Method measures, but the signal of this humistor transmission is electric signal, in many high electric fields, inflammable and explosive, chemicals
It is highly susceptible to interfere in environment, and is easy conduction voltage, to generate security risk.Some uses optical fiber FBG (Fiber
Bragg Grating, fiber bragg grating) or distribution type fiber-optic hygrometric method, but this method higher cost.Therefore, it needs
Find can in such environment hygrometric and the method that cost can be reduced.
Summary of the invention
The purpose of the utility model is to provide one kind can be realized in high alternating electric field, inflammable and explosive, chemical environment it is wet
Degree detection, and lower-cost all -fiber humidity sensing device.
To achieve the goals above, all -fiber humidity sensing device of the utility model includes light source emitter part, detection
The input terminal of optical fiber and light receiving element, light source emitter part and detection fiber connects, and output end and the light of detection fiber connect
Device connection is received, detection fiber receives the detection optical signal from light source emitter part and sends humidity feedback to light receiving element
Optical signal；Detection fiber is provided with test section, and test section includes naked fibre and the wet sensitive photorefractive material being wrapped in outside naked fibre.
By above scheme as it can be seen that the utility model all -fiber humidity sensing device is by being arranged wet sensitive on one whole optical fiber
Photorefractive material, due to wet sensitive photorefractive material can with the variation of humidity the optical power that decays accordingly, pass through detection detection light
The attenuation degree of optical power can detect the humidity of environment between signal and humidity light signal fed back, so that the use of electric power is avoided,
Ensure the safety of detection environment.Use simple optical fiber as Humidity Detection component, the connection of component can be reduced, simplifies structure, drop
Low cost, while the loss of optical signal transmission is reduced, improve the accuracy of Humidity Detection.And it is passive that all -fiber advantage, which is optical fiber,
Device, no electrical insulator, electromagnetism interference, fiber optic materials are corrosion-resistant, acid-fast alkali-proof, can be applied to inflammable and explosive, high voltage, height
Alternating electric field environment.
In further embodiment, test section bending setting.
In further embodiment, the U-shaped setting of test section.
It can be seen that since optical fiber inherently relies on the total reflection of light to be propagated, when by bending setting structure,
Total reflection optical structure is easy to make light leak outside due to outer layer variations in refractive index, to reach raising measurement sensitivity.
In further embodiment, wet sensitive photorefractive material is polyvinyl alcohol material.
It can be seen that using polyvinyl alcohol material as wet sensitive photorefractive material, the accuracy of Humidity Detection can be improved.
In further embodiment, light source emitter part is laser or LED light.
It can be seen that the light source emitter part in the utility model can use various light sources, using convenient.
In further embodiment, light receiving element is photodiode or phototriode.
It can be seen that light receiving element uses photodiode or phototriode in the utility model, cost can be reduced.
In further embodiment, detection fiber is multimode fibre.
It can be seen that using multimode fibre as detection fiber, light loss can be reduced, while affected by environment smaller, and
Convenient for wiring.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of all -fiber humidity sensing device embodiment.
The following is a further explanation of the present invention with reference to the accompanying drawings and embodiments.
Specific embodiment
As shown in Figure 1, the utility model all -fiber humidity sensing device include light source emitter part 1, detection fiber 2 and
Light receiving element 3, light source emitter part 1 are connect with the input terminal of detection fiber 2, the output end and optical receiver of detection fiber 2
Part 3 connects, and detection fiber 2 receives the detection optical signal from light source emitter part 1 and sends humidity feedback to light receiving element 3
Optical signal.Detection fiber 2 is provided with test section 21, and test section 21 includes naked fibre 211 and the wet sensitive being wrapped in outside naked fibre 211
Photorefractive material 212.The bending setting of test section 21, it is preferred that the U-shaped setting of test section 21.Wherein, wet sensitive photorefractive material
212 be polyvinyl alcohol material, and light source emitter part 1 is laser or LED light, and detection fiber 2 is multimode fibre, light receiving element
3 be photodiode or phototriode.
The utility model all -fiber humidity sensing device at work, light source emitter part 1 exports continuous detection light
Signal, detection optical signal transmits in detection fiber 2, after testing when portion 21, since test section 21 uses wet sensitive Preset grating material
Material 212, when humidity variation, water function can cause optical signal in the naked fibre 211 for being coated with wet sensitive photorefractive material 212
Therefore loss obtains humidity light signal fed back after testing behind portion 21, humidity light signal fed back is delivered to light by detection fiber 2
Humidity light signal fed back can be transmitted to external circuit connected to it and handled by receiving device 3, light receiving element 3, thus
Obtain humidity data.External circuit, can be according to the type and wet sensitive photorefractive material of detection fiber 2 when obtaining humidity data
212 types are calculated.For example, detection fiber 2 is multimode fibre in the present embodiment, multimode fibre the external refractive index is 1.34
Left and right, wet sensitive photorefractive material 212 are polyvinyl alcohol material, and for humidity when 95% changes to 20%, photorefractive material is by initial
Refractive index changes to 1.49 for 1.39, since multimode fibre can generate stripping pattern situation, so that optical power also changes with humidity and declined
Subtract, the humidity of environment is measured from the attenuation of optical power.
When making all -fiber humidity sensing device, it will test a part removal clad of optical fiber 2, form naked fibre 211,
Then wet sensitive photorefractive material 212 is coated in naked fibre 211, naked fibre 211 is fully wrapped around, naked fibre 211 is bent to U-shaped, obtained
Test section 21 after the production for completing detection fiber 2, will test the input terminal access light source emitter part 1 of optical fiber 2 and will test light
The output end of fibre 2 is connect with light receiving element 3, to complete the production of all -fiber humidity sensing device.By intelligent acess light source
Ballistic device 1 and light receiving element 3 are the well-known technique of those skilled in the art, and details are not described herein.
From the foregoing, it will be observed that the utility model all -fiber humidity sensing device on one whole optical fiber by being arranged wet sensitive Preset grating
Material, due to wet sensitive photorefractive material can with the variation of humidity the optical power that decays accordingly, by detection detection optical signal and
The attenuation degree of optical power can detect the humidity of environment between humidity light signal fed back, to avoid the use of electric power, ensure inspection
Survey the safety of environment.Use simple optical fiber as moisture detection probe, the connection of component can be reduced, simplifies structure, reduce simultaneously
The loss of optical signal transmission improves the accuracy of Humidity Detection.
It should be noted that the above is only the preferred embodiment of the utility model, but the design concept invented is not limited to
It is all to conceive the insubstantial modifications made to the utility model using this in this, also each fall within the protection scope of the utility model
Within.
Claims (7)
1. a kind of all -fiber humidity sensing device, it is characterised in that: including light source emitter part, detection fiber and optical receiver
Part, the light source emitter part are connect with the input terminal of the detection fiber, and the output end of the detection fiber connects with the light
Device connection is received, the detection fiber receives the detection optical signal from the light source emitter part and sends to light receiving element
Humidity light signal fed back；
The detection fiber is provided with test section, and the test section includes naked fibre and the wet sensitive light being wrapped in outside the naked fibre
Sell off material.
2. all -fiber humidity sensing device according to claim 1, it is characterised in that:
The test section bending setting.
3. all -fiber humidity sensing device according to claim 2, it is characterised in that:
The U-shaped setting of test section.
4. all -fiber humidity sensing device according to any one of claims 1 to 3, it is characterised in that:
The wet sensitive photorefractive material is polyvinyl alcohol material.
5. all -fiber humidity sensing device according to any one of claims 1 to 3, it is characterised in that:
The light source emitter part is laser or LED light.
6. all -fiber humidity sensing device according to any one of claims 1 to 3, it is characterised in that:
The light receiving element is photodiode or phototriode.
7. all -fiber humidity sensing device according to any one of claims 1 to 3, it is characterised in that:
The detection fiber is multimode fibre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920183618.4U CN209606320U (en) | 2019-01-31 | 2019-01-31 | All -fiber humidity sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920183618.4U CN209606320U (en) | 2019-01-31 | 2019-01-31 | All -fiber humidity sensing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460746A (en) * | 2020-11-14 | 2021-03-09 | 上海卓腾展览展示有限公司 | Temperature and humidity control method, system and device and storage medium |
| CN113437809A (en) * | 2021-07-27 | 2021-09-24 | 武汉大学 | Self-outage flexible wireless power supply receiving device and power supply method based on environment perception |
| WO2024087689A1 (en) * | 2022-10-28 | 2024-05-02 | 华为技术有限公司 | Detection method and related device |
-
2019
- 2019-01-31 CN CN201920183618.4U patent/CN209606320U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460746A (en) * | 2020-11-14 | 2021-03-09 | 上海卓腾展览展示有限公司 | Temperature and humidity control method, system and device and storage medium |
| CN113437809A (en) * | 2021-07-27 | 2021-09-24 | 武汉大学 | Self-outage flexible wireless power supply receiving device and power supply method based on environment perception |
| CN113437809B (en) * | 2021-07-27 | 2022-05-13 | 武汉大学 | Self-outage flexible wireless power supply receiving device and power supply method based on environment perception |
| WO2024087689A1 (en) * | 2022-10-28 | 2024-05-02 | 华为技术有限公司 | Detection method and related device |
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