CN201993476U - Lens pollution detection device and road condition detector - Google Patents
Lens pollution detection device and road condition detector Download PDFInfo
- Publication number
- CN201993476U CN201993476U CN2011200027580U CN201120002758U CN201993476U CN 201993476 U CN201993476 U CN 201993476U CN 2011200027580 U CN2011200027580 U CN 2011200027580U CN 201120002758 U CN201120002758 U CN 201120002758U CN 201993476 U CN201993476 U CN 201993476U
- Authority
- CN
- China
- Prior art keywords
- lens
- light signal
- unit
- light
- optical signal
- 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
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 11
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 9
- 239000011521 glass Substances 0.000 claims description 25
- 230000001681 protective effect Effects 0.000 claims description 25
- 238000011109 contamination Methods 0.000 claims description 18
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 239000011651 chromium Substances 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000005304 optical glass Substances 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 210000000003 hoof Anatomy 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The utility model relates to a lens pollution detection device. A light-transmitting surface at one side of a detected lens is provided with an optical signal transmitting unit in a contact mode. A light-transmitting surface at the other side of the lens is provided with an optical signal reflecting unit in a mode that the optical signal reflecting unit is in contact with the light-transmitting surface, wherein the light-transmitting surface corresponds to a light path of the lens, which emitted light of the optical signal transmitting unit passes through. An optical signal receiving unit of which an output end is connected to a signal processing unit is arranged at a position at which the lens is used as a photoconductor in a mode that the optical signal receiving unit is in contact with the light-transmitting surface at the position. The optical signal transmitting unit sends a detection optical signal. After being reflected between the light-transmitting surface at one side of the lens and the light-transmitting surface at the other side of the lens, the optical signal is received by the optical signal receiving unit. The utility model also discloses a road condition detector. When the lens, particularly the road condition detector which is used as the lens of safety spectacles, is polluted, the lens is detected by the lens pollution detection device and a parameter of the degree that the lens is polluted is calculated by the lens pollution detection device. The deviation of obtained data, which is caused by the polluted lens, can be corrected. The measuring accuracy and the working efficiency are greatly improved.
Description
Technical field
The utility model relates to a kind of pick-up unit of lens contamination degree and has the pavement behavior detector of this device.
Background technology
In fields such as engineer operation, meteorological researchs, often need road pavement humidity, have or not ponding, freeze or various situations such as accumulated snow detect.A kind of pavement behavior detector profile commonly used at present is the rectangular parallelepiped casing; in casing, be equipped with and extraneous Laser emission lens barrel and the corresponding reception lens barrel that communicates; in the Laser emission lens barrel to be provided with lens (hereinafter to be referred as protective glasses) as protective glasses with its coaxial manner; the medial extremity of Laser emission lens barrel is to be provided with generating laser with this lens barrel coaxial manner; between protective glasses and generating laser, be provided with the aspherics lens; protective glasses is used to protect the aspherics lens, avoids its influence of outer bound pair.During the work of pavement behavior detector it is installed on the other column in tested road surface, the Laser emission lens barrel of detector and corresponding reception lens barrel all point to tested road surface.Start working after the detector energized, the laser that generating laser is launched is penetrated to tested road surface by the Laser emission lens barrel through aspherics lens and protective glasses, receive lens barrel and receive the laser signal that returns by tested road reflection, and testing result carried out computing and processing, then by the wired or wireless assigned address that sends to.
In the real work of pavement behavior detector,, protective glasses in the Laser emission lens barrel is polluted and make the bigger deviation of the inaccurate appearance of measurement result because be subjected in the environment of living in as the influence of various factorss such as dust, humid air or greasy dirt.Present solution is after protective glasses is contaminated, and the artificially goes frequent cleans by dirty protective glasses, calibrates again to work on again.Obviously, this method can increase the unnecessary process of many repetitions and meaningless workload in the operate as normal that pavement behavior detects, make work efficiency very low.
The utility model content
The utility model provides a kind of lens contamination pick-up unit and has had the pavement behavior detector of this device, purpose be when in the lens especially pavement behavior detector as the lens of protective glasses contaminated after, the scioptics pollution detection device detects related data calculates the contaminated degree of lens after routine processes parameter, so that correct detecting the deviation that data occur because of lens are contaminated.
Lens contamination pick-up unit of the present utility model, side transparent surface at detected lens is provided with the light signal transmitter unit in the mode of contacting, at the emission light of light signal transmitter unit on the corresponding lens opposite side of the light-path of lens transparent surface, to be provided with the light signal reflector element with this transparent surface mode of contacting, at a position that with lens is optical conductor, to be provided with the light signal receiving element that output terminal is connected in signal processing unit with the transparent surface mode of contacting at this position, the light signal transmitter unit sends the light signal of detection, and light signal reflection back between side transparent surface of lens and opposite side transparent surface is received by the light signal receiving element.The light signal receiving element is located on the either side transparent surface of lens.The surface of contact of light signal reflector element and lens can be continuous or discrete annular, also can be beneficial to the geometric figure of realizing the light reflection for the shape of a hoof, rectangle, square or other.The reflecting surface of light signal reflector element can be arranged to the emission light input path of light signal transmitter unit in a certain angle so that incident light between can two transparent surfaces after the reflecting surface reflection at lens along transmitting with the light-path reflection of lens sagittal plane parallel direction.The light signal receiving element is provided with in the mode of contacting in a side of the light-path process lens transparent surface of lens, to receive the light emission signal through the lens light path.The light signal reflector element purpose that contacts with the lens transparent surface makes the light signal of detection obtain reflection at once on the lens transparent surface and does not penetrate lens and produces loss; Light signal transmitter unit and light signal receiving element and the contacted purpose of lens transparent surface are to avoid external uncertainty to detecting the influence of data.If light signal transmitter unit or light receiving unit and lens transparent surface are provided with at interval, detect the influence that light then can be received factors such as air between them, dust or humidity, make the light signal strength that finally receives become non-quantitative, and be difficult to realize accurately detecting the purpose of pollution parameters.During work, the light signal transmitter unit emission light that signal processing unit receives with the light signal receiving element reflects the light signal strength that obtains on clean lens transparent surface be benchmark, after the lens transparent surface is contaminated, the reflection of light on transparent surface will change, the luminous flux that the light signal receiving element receives can increase, the opto-electronic conversion amount that is produced thus also can increase, signal processing unit calculates this increment by program, thereby obtain the parameter of the contaminated degree of corresponding lens, the deviation of the gained data that occur because of lens are contaminated is corrected.
Further, the light signal transmitter unit is arranged on lens axis position in addition.For the emission light that can make the light signal transmitter unit can reflect the contaminated degree of lens transparent surface more fully, the light signal transmitter unit can be arranged on position beyond the axis of lens, and make the light-path reflections propagate of emission light along lens.
Further, the contacted reflecting surface of reflector element and lens is the metal construction face.Using the metal construction face to increase the reflection of light rate, strengthen reflection of light intensity is a kind of common mode.With the reflecting surface of the metal material that helps the light reflection commonly used as reflector element, for example copper, iron, aluminium, steel, stainless steel, chromium, nickel, nickel-chrome or other metal material that is beneficial to the light reflection commonly used.
Preferably, the reflecting surface of reflection part is the chromium plating structural plane.The characteristics of chromium are that matter is hard, anticorrosion, and are easy to coating, have characteristics such as good light signal reflectivity, enhancing light reflection strength.
Further, light signal transmitter unit and light signal receiving are arranged on the homonymy of said lens sagittal plane.With light signal transmitter unit and light signal receiving be arranged on the homonymy of said lens sagittal plane can simplified design be connected.
Preferably, the light signal transmitter unit is an infrared transmitter, and light signal receiving is an infrared remote receiver.Using infrared light is a kind of detection means of using always as sensed light signal, can adopt common various infrared transmitters and infrared remote receiver here, to reduce equipment cost.Be preferably SIR323-5 type infrared transmitter and PD204-6B type infrared remote receiver.
Further, light signal transmitter unit, light signal reflector element and light signal receiving element all are provided with along the periphery of said lens or near its periphery.This setup can make light signal transmitter unit and light signal receiving element be positioned at lens two opposite edges edge position, at utmost makes the diameter length that detects the light scioptics, and the whole transparent surface of lens is detected.
Preferably, the light signal reflector element is a ring texture.Ring texture can be continuous or discrete ring.Particularly at light signal on the lens opposite side transparent surface of the corresponding light signal receiving element of the light-path of lens, to establish ring-shaped light signal reflex unit with this transparent surface mode of contacting, can further add the high light reflection strength, improve the reception degree of light signal reflector element light signal.
The invention also discloses a kind of pavement behavior detector, in detector, comprise and be installed in the lens barrel that is used for Laser emission that communicates with the external world in the detector casing, in lens barrel to be provided with lens as protective glasses with its coaxial manner, the medial extremity of lens barrel is to be provided with generating laser with the lens barrel coaxial manner, described as protective glasses lens and generating laser between be provided with the aspherics lens, wherein the lens as protective glasses are the lens with said lens pollution detection device.Protective glasses is to be made of plane optical glass, transmittance 〉=99.5%, and the inboard roughness of two transparent surface is at least 0.005mm, helps the reflection of light signal.
Further, be provided with in the contacted mode of the inwall of its periphery and lens barrel as the lens of protective glasses, the light signal reflector element is fixed by securing member.Securing member can be threaded fastener structures such as screw or nut.
Test shows, after lens especially pavement behavior detector are contaminated as the lens of protective glasses, lens are detected and calculate the parameter of the contaminated degree of lens by lens contamination pick-up unit of the present utility model, can correct the deviation of the gained data that occur because of lens are contaminated.After particularly in the pavement behavior detector, being provided with this pick-up unit, make detector no longer constantly manually go cleaning and calibration more at work, greatly improved accuracy and the work efficiency measured because protective glasses is contaminated.
Below in conjunction with embodiment, foregoing of the present utility model is described in further detail again by the accompanying drawing illustrated embodiment.But this should be interpreted as that the scope of the above-mentioned theme of the utility model only limits to following example.Do not breaking away under the above-mentioned technological thought situation of the utility model, various replacements or change according to ordinary skill knowledge and customary means are made all should be included in the scope of the present utility model.
Description of drawings
Fig. 1 is the diagrammatic cross-section of the utility model lens contamination pick-up unit user mode.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the sectional view of Laser emission lens barrel with pavement behavior detector of Fig. 1 pick-up unit.
Embodiment
Embodiment 1:
As shown in Figure 1, lens contamination pick-up unit of the present utility model, be provided with the light signal transmitter unit 1 of infrared transmitter form at the extraneous dorsad side transparent surface 7 of detected lens 3 in the mode of contacting near peripheral region, the emission light of light signal transmitter unit 1 through the corresponding lens 3 of the light-path of lens on an extraneous side transparent surface 6, to be provided with and light signal reflector element 5 with these transparent surface 6 peripheral region modes of contacting.As shown in Figure 2, light signal reflector element 5 is continuous annular with the surface of contact of lens 3, and its outer shroud periphery overlaps with the periphery of lens 3 or approximate the coincidence.Among Fig. 1, with lens be optical conductor and light signal transmitter unit 1 homonymy another near lens 3 peripheral regions, to be provided with the light signal receiving element 2 that output terminal is connected in the infrared remote receiver form of signal processing unit (not shown) with transparent surface 6 modes of contacting at this position.On the reflecting surface 4 of light signal reflector element 5, be provided with the chromium plating reflection horizon.The reflecting surface 4 of light signal reflector element 5 is arranged to the emission light input path of light signal transmitter unit 1 in a certain angle, so that the reflected light path on the reflecting surface 4 do not overlap with input path from light signal transmitter unit 1, and can make incident light through reflecting surface 4 reflection backs between transparent surface 6 and transparent surface 7 along with the light-path reflection transmission of lens 3 sagittal plane parallel directions.During work, the signal processing unit (not shown) is a benchmark with the emission light infrared signal intensity that reflection obtains on clean transparent surface 6 and transparent surface 7 of light signal receiving element 2 receiving optical signals transmitter units 1, after the transparent surface 6 of lens 3 and/or transparent surface 7 are contaminated, the reflection of infrared light on transparent surface 6 and transparent surface 7 will change, the luminous flux that infrared remote receiver 2 receives can increase, the opto-electronic conversion amount that is produced thus also can increase, the signal processing unit (not shown) calculates this increment by program, thereby obtain corresponding lens 3 contaminated extent index, to correcting because of the deviation of the lens 3 contaminated gained data that occur.
Embodiment 2:
As shown in Figure 3, a kind of Laser emission lens barrel of pavement behavior detector, be provided with in the casing 10 in detector and the extraneous Laser emission lens barrel 11 that communicates, in lens barrel 11 to be provided with lens 3 as protective glasses with its coaxial manner, the medial extremity of lens barrel 11 is to be provided with generating laser 9 with lens barrel 11 coaxial manners, said as protective glasses lens 3 and generating laser 9 between be provided with aspherics lens 12, wherein as the lens 3 of protective glasses for having the lens 3 of embodiment 1 described lens contamination pick-up unit.Wherein the lens 3 as protective glasses are to be made of plane optical glass, transmittance 〉=99.5%, and the inboard roughness of its transparent surface 6 and transparent surface 7 is at least 0.005mm, to help the reflection of light signal.The light signal transmitter unit 1 of infrared transmitter form and the light signal receiving element of infrared remote receiver form 2 are further fixing by fixed cell 13.To be provided with as the lens 3 of protective glasses the contacted mode of inwall with its periphery and lens barrel 11, the lens contamination pick-up unit is with after doing relative set described in the embodiment 1, and the nut fastener 8 by lens barrel 11 outer ends will be fastenedly connected between the light signal reflector element 5 of pick-up unit and the lens 3.
Claims (10)
1. lens contamination pick-up unit, a side transparent surface (7) that it is characterized by at detected lens (3) is provided with light signal transmitter unit (1) in the mode of contacting, at the emission light of light signal transmitter unit (1) on the corresponding lens of light-path (3) the opposite side transparent surfaces (6) of lens (3), to be provided with light signal reflector element (5) with this transparent surface (6) mode of contacting, it with lens (3) position of optical conductor, to be provided with the light signal receiving element (2) that output terminal is connected in signal processing unit with transparent surface (6) mode of contacting at this position, light signal transmitter unit (1) sends the light signal of detection, and light signal reflection back between side transparent surface (7) of lens (3) and opposite side transparent surface (6) is received by light signal receiving element (2).
2. lens contamination pick-up unit as claimed in claim 1 is characterized by said light signal transmitter unit (1) and is arranged on lens (3) axis position in addition.
3. lens contamination pick-up unit as claimed in claim 1, it is characterized by reflector element (5) is the metal construction face with the contacted reflectings surface of lens (3) (4).
4. lens contamination pick-up unit as claimed in claim 3, the reflecting surface (4) that it is characterized by described reflection part (5) is the chromium plating structural plane.
5. lens contamination pick-up unit as claimed in claim 1 is characterized by the homonymy that light signal transmitter unit (1) and light signal receiving (2) are arranged on said lens (3) sagittal plane.
6. lens contamination pick-up unit as claimed in claim 1, it is characterized by light signal transmitter unit (1) is infrared transmitter, light signal receiving (2) is an infrared remote receiver.
7. as the described lens contamination pick-up unit of one of claim 1 to 6, it is characterized by said light signal transmitter unit (1), light signal reflector element (5) and light signal receiving element (2) and all be provided with along the periphery of said lens (3) or near its periphery.
8. lens contamination pick-up unit as claimed in claim 7 is characterized by said light signal reflector element (5) and is ring texture.
9. pavement behavior detector, comprise and be installed in the lens barrel that is used for Laser emission (11) that communicates with the external world in the detector casing (10), in lens barrel (11) to be provided with lens (3) as protective glasses with its coaxial manner, the medial extremity of lens barrel (11) is to be provided with generating laser (9) with lens barrel (11) coaxial manner, between described lens (3) and generating laser, be provided with aspherics lens (12), it is characterized by described lens (3) for having the lens of the described lens contamination pick-up unit of one of claim 1 to 8 as protective glasses as protective glasses.
10. pavement behavior detector as claimed in claim 9 is characterized by said lens as protective glasses (3) and is provided with in the contacted mode of inwall of its periphery and lens barrel (11), and light signal reflector element (5) is fixing by securing member (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200027580U CN201993476U (en) | 2011-01-06 | 2011-01-06 | Lens pollution detection device and road condition detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200027580U CN201993476U (en) | 2011-01-06 | 2011-01-06 | Lens pollution detection device and road condition detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201993476U true CN201993476U (en) | 2011-09-28 |
Family
ID=44669962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200027580U Expired - Fee Related CN201993476U (en) | 2011-01-06 | 2011-01-06 | Lens pollution detection device and road condition detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201993476U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675502A (en) * | 2016-03-30 | 2016-06-15 | 广东美的厨房电器制造有限公司 | Sensor for detecting attachment quantity value and household appliance |
| CN105806809A (en) * | 2016-03-30 | 2016-07-27 | 广东美的厨房电器制造有限公司 | Sensor for detecting attachment magnitude and domestic electrical instrument |
| CN105891158A (en) * | 2016-03-30 | 2016-08-24 | 广东美的厨房电器制造有限公司 | Circuit and sensor for detecting quantity value of attachments and range hood |
| CN112739488A (en) * | 2018-08-22 | 2021-04-30 | 奥托立夫开发公司 | Device and method for detecting laser welding protective glass |
-
2011
- 2011-01-06 CN CN2011200027580U patent/CN201993476U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675502A (en) * | 2016-03-30 | 2016-06-15 | 广东美的厨房电器制造有限公司 | Sensor for detecting attachment quantity value and household appliance |
| CN105806809A (en) * | 2016-03-30 | 2016-07-27 | 广东美的厨房电器制造有限公司 | Sensor for detecting attachment magnitude and domestic electrical instrument |
| CN105891158A (en) * | 2016-03-30 | 2016-08-24 | 广东美的厨房电器制造有限公司 | Circuit and sensor for detecting quantity value of attachments and range hood |
| CN105675502B (en) * | 2016-03-30 | 2018-10-02 | 广东美的厨房电器制造有限公司 | Sensor and household electrical appliance for detecting attachment magnitude |
| CN105806809B (en) * | 2016-03-30 | 2019-06-04 | 广东美的厨房电器制造有限公司 | For detecting the sensor and household electrical appliance of attachment magnitude |
| CN105891158B (en) * | 2016-03-30 | 2020-03-06 | 广东美的厨房电器制造有限公司 | Circuit for detecting attachment magnitude, sensor and range hood |
| CN112739488A (en) * | 2018-08-22 | 2021-04-30 | 奥托立夫开发公司 | Device and method for detecting laser welding protective glass |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203100688U (en) | Optical fiber sensor for measuring tip clearance of rotating blades | |
| CN104390987B (en) | A kind of novel optical fiber sensor detecting steel ball surface defect and detection method | |
| CN201993476U (en) | Lens pollution detection device and road condition detector | |
| CN101718571B (en) | Tilt fiber bragg grating (TFBG) liquid level change measuring instrument | |
| CN201892569U (en) | High-sensitivity and low-frequency vibrating sensor based on MMF-TFBG optical fiber structure | |
| CN102661855A (en) | Method and system for progressive additional lens detection based on optical coherence tomography | |
| WO2014114226A1 (en) | Apparatus for monitoring deformation of large building and monitoring method thereby | |
| WO2006042012A3 (en) | Pressure sensor | |
| CN102004079B (en) | On-line oil particle pollution degree detection sensor based on optical sensing | |
| CN102156112A (en) | Flue gas flow velocity measuring device and method | |
| CN103644990A (en) | Compact glass surface stress measuring instrument | |
| CN106017519A (en) | Optical fiber Fabry-Perot sensor demodulation system and method | |
| CN102393220A (en) | SMS (single mode-multimode-single mode) optical fiber structural duplexing sensor | |
| CN104833314B (en) | A kind of fiber optic high-resolution strain transducer and measuring method | |
| CN203587256U (en) | Compact glass surface stress measuring instrument | |
| CN107490563A (en) | A kind of measurement apparatus and method of monitoring instrument diaphragm laying dust | |
| CN204188317U (en) | A kind of distribution type fiber-optic pressure transducer based on OTDR | |
| CN102980682B (en) | Self-correcting full distribution optical fiber raman temperature sensor | |
| WO2014155136A2 (en) | Tyre assessment | |
| CN108512593A (en) | A kind of optical cable diagnostic device and method based on FBG (FBG) demodulators | |
| CN208802044U (en) | Vehicle steering angle measuring device | |
| CN108317971B (en) | An angle detection device | |
| CN102494665B (en) | Method of Measuring Torsion Angle of Theodolite Equipment Based on Laser Communication | |
| CN202267590U (en) | Detecting device of free surface lens | |
| CN105444839B (en) | Plastic optical fiber liquid level sensor and measurement method based on optical time domain reflectometry |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20120106 |