CN111560909A - Automatic temperature control carbon fiber heating deicing device for medium-low speed magnetic suspension traffic power supply rail - Google Patents
Automatic temperature control carbon fiber heating deicing device for medium-low speed magnetic suspension traffic power supply rail Download PDFInfo
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- CN111560909A CN111560909A CN202010272788.7A CN202010272788A CN111560909A CN 111560909 A CN111560909 A CN 111560909A CN 202010272788 A CN202010272788 A CN 202010272788A CN 111560909 A CN111560909 A CN 111560909A
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- temperature
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- heating
- supply rail
- carbon fiber
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 84
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 21
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 21
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 239000000725 suspension Substances 0.000 title claims abstract description 7
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 47
- 239000013307 optical fiber Substances 0.000 claims abstract description 46
- 238000004891 communication Methods 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 13
- 238000005339 levitation Methods 0.000 claims description 12
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000005856 abnormality Effects 0.000 claims 2
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H8/00—Removing undesirable matter from the permanent way of railways; Removing undesirable matter from tramway rails
- E01H8/02—Methods or apparatus for removing ice or snow from railway tracks, e.g. using snow-ploughs ; Devices for dislodging snow or ice which are carried or propelled by tramway vehicles ; Moving or removing ballast
- E01H8/08—Methods or apparatus for removing ice or snow from railway tracks, e.g. using snow-ploughs ; Devices for dislodging snow or ice which are carried or propelled by tramway vehicles ; Moving or removing ballast by application of heat, e.g. by means of heated clearing instruments, melting in situ; Clearing devices which melt the dislodged snow; Clearing exclusively by means of rays or streams or gas or stream, or by suction
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/30—Tracks for magnetic suspension or levitation vehicles
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention relates to an automatic temperature control carbon fiber heating deicing device for a medium-low speed magnetic suspension traffic power supply rail, which comprises: distributed optical fiber temperature measurement component: the temperature measurement system comprises a temperature measurement host and an optical fiber sensor, wherein the temperature measurement host is connected with the optical fiber sensor; a wireless communication component: the temperature measuring host and the control center are respectively connected for transmitting temperature information; heating the assembly: the heating wire and the heating controller with the relay are connected with the temperature measurement host, and the heating wire is connected with the heating controller. Compared with the prior art, the invention has the advantages of continuous, accurate and real-time measurement, suitability for high electromagnetic environment, remote monitoring, high sensitivity, long service life, low cost, high electric-heat conversion efficiency, convenient maintenance and the like.
Description
Technical Field
The invention relates to the technical field of rail transit vehicles, in particular to an automatic temperature control carbon fiber heating deicing device for a medium-low speed magnetic suspension traffic power supply rail.
Background
The medium-low speed maglev train is driven by a short stator induction motor, the induction motor stator installed on the train needs to be provided with electric energy by the ground, and at present, the power supply mode of the medium-low speed maglev train is as follows: and a power supply contact rail is arranged on the side surface of a track beam below the F-shaped suspension guide rail, and a lateral current collector is arranged at the bottom of the suspension frame of the maglev train. The lateral current collector sends ground electric energy to the vehicle through mechanical sliding contact with the power supply contact rail under the action of certain pressure. In the process of taking current by the lateral current collector, the influence of the installation precision of the power supply contact rail and the smoothness of the rail is large, and the icing phenomenon is easily generated on the surface of the power supply rail in winter due to rain, snow and low-temperature weather, so that the power supply performance is seriously reduced, and the driving safety is influenced.
Therefore, a need exists for researching an online temperature measurement deicing device for a power supply rail of a medium-low speed maglev train, so as to avoid the problem that the driving safety is affected due to unstable current collection caused by icing of the power supply rail, and further improve the reliability of the system.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the automatic temperature control carbon fiber heating deicing device for the medium-low speed magnetic levitation traffic power supply rail.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides an automatic temperature control carbon fiber heating defroster of well low-speed magnetic levitation traffic power supply rail, the device includes:
distributed optical fiber temperature measurement component: the temperature measurement system comprises a temperature measurement host and an optical fiber sensor, wherein the temperature measurement host is connected with the optical fiber sensor;
a wireless communication component: the temperature measuring host and the control center are respectively connected for transmitting temperature information;
heating the assembly: the heating wire and the heating controller with the relay are connected with the temperature measurement host, and the heating wire is connected with the heating controller.
The optical fiber sensor is a spiral steel pipe armored temperature measuring optical cable which is arranged in parallel with a power supply line in the power supply rail.
The power supply line, the optical fiber sensor and the heating wire are arranged side by side in a clamping groove mode.
The heater strip be equipped with one or many, when setting up many, many heater strips are installed side by side with power supply line and optical fiber sensor with the draw-in groove form respectively.
The temperature measurement host is provided with a display for displaying an operation interface, is used for displaying a real-time temperature distribution curve and a temperature change curve of the power supply rail, and automatically gives an alarm when the temperature is abnormal.
The temperature measurement host is provided with an AP Sensing external interface, and the AP Sensing external interface consists of a temperature measurement optical cable interface, a relay expansion interface, a network interface and an RS232/485 interface.
The laser pulse generator is arranged in the temperature measurement host, when the detected temperature is lower than a set value, the heating wire is started through the heating controller, and when the detected temperature is higher than the set value, the heating wire is closed through the heating controller.
The heating wires are carbon fiber heating wires.
The temperature measurement host is provided with optical fiber damage detection and device abnormity alarm functions, whether the device is abnormal or not is judged by setting upper and lower detection temperature limits, when the real-time temperature is detected to exceed the upper detection temperature limit or be lower than the lower detection temperature limit, device abnormity alarm is sent, and when no temperature is displayed, optical fiber damage alarm is sent.
Compared with the prior art, the invention has the following advantages:
firstly, the distributed optical fiber sensor adopted by the invention can continuously, accurately and real-timely measure the temperature of each part of the line, has high measurement precision, can accurately position abnormal points of the temperature, has obviously reduced missing report rate and false report rate, has high response speed and is safe and reliable in system operation.
The optical fiber sensor is made of quartz, has good electromagnetic interference resistance and complete electrical insulation, and can work in a high-electromagnetic environment.
The invention is suitable for remote monitoring, and has long measuring distance, large transmission data volume of the optical fiber and small loss.
The invention has high sensitivity and high measurement precision, and the sensitivity and the measurement precision of the adopted optical fiber sensor are superior to those of the common sensor.
The invention has long service life, low cost, simple and easy-to-use system, the optical fiber is made of quartz glass, has the characteristics of no corrosion, fire resistance, water resistance and long service life, can be used for 30 years generally, the cost of the sensor and the subsequent maintenance cost are comprehensively considered, and the final operation cost of the whole project can be greatly reduced by using the optical fiber sensor.
The carbon fiber heating wire adopted by the invention has the advantages of high electric heat conversion efficiency, quick temperature rise, high tensile strength, no electric arc generation when the wire is broken, stable chemical property and the like.
And seventhly, due to the existence of the heating assembly, the icing phenomenon on the surface of the power supply line can be effectively removed, and the safety and the reliability of the system are improved.
And eighthly, the heating wires are installed in a clamping groove mode, so that the maintenance is convenient, and the maintenance cost is reduced.
Drawings
FIG. 1 is a schematic diagram of the general structure of the power supply rail online temperature measurement deicing system.
FIG. 2 is a schematic view of a partial structure of the power supply rail online temperature measurement deicing system of the present invention.
FIG. 3 is a schematic view of the arrangement of the optical fiber and the heating wire of the present invention along the line.
FIG. 4 is a schematic side view of the optical fiber and heating wire arrangement of the present invention.
FIG. 5 is a schematic diagram of another type of lateral arrangement of optical fibers and heating wires under a power supply rail.
FIG. 6 is another schematic diagram of another type of arrangement of the optical fibers and the heating wires under the power supply rail along the line
FIG. 7 is a flow chart of the on-line temperature measurement deicing system for the power supply rail of the medium-low speed maglev train.
The notation in the figure is:
1. the temperature measurement host computer, 2, wireless communication subassembly, 3, heating controller, 4, display, 5, optical fiber sensor, 6, heater strip, 7, power supply line, 8, power supply rail, 9, the power supply contact surface of power supply rail of another form.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
The invention provides a carbon fiber electric heating deicing device for a medium-low speed magnetic levitation traffic power supply rail, which comprises a distributed optical fiber temperature measurement component, a wireless communication component and a heating component, wherein the distributed optical fiber temperature measurement component comprises a temperature measurement host 1 and an optical fiber sensor 5, the temperature measurement host 1 is connected with a control center through the wireless communication component, and temperature information is transmitted in real time; the optical fiber sensor 5 adopts a commonly used spiral steel tube armored temperature measurement optical cable in the market, the positioning precision is 1m, the temperature resolution is 0.1 ℃, the use temperature range is-20 ℃ to 85 ℃, and the output end of the optical fiber sensor 5 is directly connected with a temperature measurement host.
The temperature measurement main part 1 is provided with a display, is provided with a monitoring system and is matched with corresponding software and hardware, can acquire information in real time, has the functions of signal conditioning, analog-to-digital conversion, data preprocessing and the like, can receive temperature data and temperature change data in real time, and displays the data on the display in two forms of numbers and images.
The display 4 displays the temperature distribution curve and the temperature change distribution curve on the line in real time.
An external interface of the AP Sensing is arranged on the temperature measurement host 1 and consists of a temperature measurement optical cable interface, a relay expansion interface, a network interface and an RS232/485 interface.
A laser pulse generator is arranged in the temperature measurement host 1, and heating starting temperature and heating stopping temperature are arranged in monitoring system software in the temperature measurement host 1, namely when the temperature is lower than the heating starting temperature, the heating assembly is started, and when the temperature is higher than the heating stopping temperature, the heating assembly is stopped.
The temperature measurement host 1 has the functions of optical fiber damage detection and device abnormity alarm, and whether the device is abnormal or not is judged by setting a detection threshold value in the system. The threshold value is the upper limit and the lower limit of the detection temperature, namely when the real-time temperature is detected to exceed the upper limit of the detection temperature or be lower than the lower limit of the detection temperature, the abnormal alarm of the device is sent out; when the temperature is not displayed, an optical fiber damage alarm is sent out.
The heating assembly comprises a heating controller 3 and a heating wire 6, the heating controller 3 is provided with a relay unit, and the heating controller 3 is connected with the temperature measurement host 1 through the relay unit.
The heating controller 3 has the functions of overheat protection and electric leakage protection, and can output a control signal through a relay node in the relay unit to switch on a power supply of the heating wire and start the heating system.
The heating wire 6 is a carbon fiber heating wire.
The temperature measuring optical cable 7 and the heating wire 6 are both arranged on the power supply rail 8 in a clamping groove mode.
Example 1
As shown in fig. 1, the carbon fiber electric heating deicing device for the medium-low speed magnetic levitation traffic power supply rail comprises a distributed optical fiber temperature measurement component and a heating component, wherein the distributed optical fiber temperature measurement component comprises a temperature measurement host 1, an optical fiber sensor 5 and a wireless communication component 2, the temperature measurement host 1 is connected with a control center through the wireless communication component 2, and temperature information is transmitted in real time; the optical fiber sensor 5 adopts a commonly used spiral steel tube armored temperature measuring optical cable in the market. The output end of the optical fiber sensor 5 is directly connected with the temperature measurement host 1.
The temperature measurement host 1 is provided with a display 4, the temperature measurement host is matched with a windows operating system and is provided with monitoring software, a software operating interface is directly displayed in the display 4, the operating interface is a Chinese interface, a real-time temperature distribution curve and a temperature change curve are displayed in the interface, an alarm is automatically given when the temperature is abnormal, and data are transmitted back to the master control center in real time. The temperature measuring distance can reach dozens of kilometers according to the arrangement of the optical fibers, and when the real-time temperature is detected to be lower than the set heating starting temperature, a control command is sent to the heating controller 3 to start the heating assembly; when the detected temperature exceeds the set heating off temperature, a control command is sent to the heating controller 3 to turn off the heating assembly.
As shown in fig. 2, the optical fiber sensor 5 is arranged in parallel with the power supply line 7 in the present embodiment, so as to ensure that the temperature near the power supply line 7 can be detected more accurately, and whether the icing phenomenon exists can be judged; in the embodiment, the heating wire 6 is also arranged in parallel with the power supply wire 7, so that the power supply wire 7 can be heated more uniformly, the temperature of the power supply wire 7 is uniformly increased, and the ice on the surface is melted.
As shown in fig. 3, the optical fiber sensor 5 and the heating wire 6 are both installed in a clamping groove form, so that the optical fiber sensor 5 or the heating wire 6 can be maintained more easily when damaged, and the maintenance cost is saved.
Example 2
As shown in fig. 4 and 5, another power supply rail is characterized in that, on the basis of the existing power supply rail for the long-sand medium-low speed maglev train, a plurality of clamping grooves are formed in the lower part of the power supply rail as required, and a heating wire 6 and an optical fiber sensor 5 are installed, and the rest of the facility equipment is the same as that in embodiment 1.
The above embodiments are merely examples and do not limit the scope of the present invention. These embodiments may be implemented in other various manners, and various omissions, substitutions, and changes may be made without departing from the technical spirit of the present invention.
Claims (9)
1. The utility model provides an automatic temperature control carbon fiber heating defroster of well low-speed magnetic levitation traffic power supply rail which characterized in that, the device includes:
distributed optical fiber temperature measurement component: comprises a temperature measuring host (1) and an optical fiber sensor (5) which are connected with each other and are arranged in a power supply rail (8) for measuring the temperature near a power supply line (7);
wireless communication component (2): the temperature measuring device is respectively connected with the temperature measuring host (1) and the control center and used for transmitting temperature information;
heating the assembly: the temperature measuring device comprises a heating wire (6) arranged in parallel with a power supply line (7) and a heating controller (3) connected with a temperature measuring host (1) and provided with a relay, wherein the heating wire (6) is connected with the heating controller (3).
2. The automatic temperature control carbon fiber heating deicing device for the medium-low speed magnetic levitation traffic power supply rail according to claim 1, wherein the optical fiber sensor (5) is a spiral steel tube armored temperature measurement optical cable which is arranged in parallel with the power supply line (7) in the power supply rail (8).
3. The automatic temperature control carbon fiber heating deicing device for the medium-low speed magnetic levitation traffic power supply rail according to claim 1, wherein the power supply line (7), the optical fiber sensor (5) and the heating wire (6) are installed side by side in a clamping groove form.
4. The automatic temperature control carbon fiber heating deicing device for the medium-low speed magnetic levitation transportation power supply rail according to claim 3, wherein one or more heating wires (6) are arranged, and when the plurality of heating wires (6) are arranged, the plurality of heating wires (6) are respectively arranged side by side with the power supply line (7) and the optical fiber sensor (5) in a clamping groove mode.
5. The automatic temperature control carbon fiber heating deicing device for the medium-low speed magnetic levitation transportation power supply rail according to claim 1, wherein the temperature measurement host (1) is provided with a display (4) for displaying an operation interface, displaying a real-time temperature distribution curve and a temperature change curve of the power supply rail (8), and automatically alarming when the temperature is abnormal.
6. The automatic temperature control carbon fiber heating deicing device for the medium-low speed magnetic levitation transportation power supply rail according to claim 1, characterized in that an AP Sensing external interface is arranged on the temperature measurement host (1), and the AP Sensing external interface is composed of a temperature measurement optical cable interface, a relay expansion interface, a network interface and an RS232/485 interface.
7. The automatic temperature control carbon fiber heating deicing device for the medium-low speed magnetic levitation traffic power supply rail according to claim 1, characterized in that a laser pulse generator is arranged in the temperature measurement host (1), when the detected temperature is lower than a set value, the heating wire (6) is started through the heating controller (3), and when the detected temperature is higher than the set value, the heating wire (6) is closed through the heating controller (3).
8. The automatic temperature control carbon fiber heating deicing device for the medium-low speed magnetic suspension traffic power supply rail according to claim 1, wherein the heating wire (6) is a carbon fiber heating wire.
9. The automatic temperature control carbon fiber heating deicing device for the medium-low speed magnetic levitation traffic power supply rail according to claim 1, characterized in that the temperature measurement host (1) is provided with functions of optical fiber damage detection and device abnormality alarm, whether the device is abnormal is judged by setting upper and lower detection temperature limits, when the real-time temperature is detected to exceed the upper detection temperature limit or be lower than the lower detection temperature limit, a device abnormality alarm is given, and when no temperature is displayed, an optical fiber damage alarm is given.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010272788.7A CN111560909A (en) | 2020-04-09 | 2020-04-09 | Automatic temperature control carbon fiber heating deicing device for medium-low speed magnetic suspension traffic power supply rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010272788.7A CN111560909A (en) | 2020-04-09 | 2020-04-09 | Automatic temperature control carbon fiber heating deicing device for medium-low speed magnetic suspension traffic power supply rail |
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| Publication Number | Publication Date |
|---|---|
| CN111560909A true CN111560909A (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010272788.7A Pending CN111560909A (en) | 2020-04-09 | 2020-04-09 | Automatic temperature control carbon fiber heating deicing device for medium-low speed magnetic suspension traffic power supply rail |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104183334A (en) * | 2013-05-28 | 2014-12-03 | 苏州南智传感科技有限公司 | Novel composite sensing optical cable |
| JP2015089999A (en) * | 2013-11-05 | 2015-05-11 | 東日本旅客鉄道株式会社 | Snow-melting and antifreezing device for flangeway part within railroad crossing |
| CN204882987U (en) * | 2015-07-24 | 2015-12-16 | 成都亨通光通信有限公司 | Novel spiral steel pipe armor temperature measurement optical cable |
| CN108454464A (en) * | 2018-04-26 | 2018-08-28 | 湖南华品轨道交通有限公司 | A kind of conductor rail deicing system |
| CN109269650A (en) * | 2018-11-19 | 2019-01-25 | 无锡新润源信息科技有限公司 | Distributed optical fiber temperature measurement equipment and its system |
| CN208559041U (en) * | 2018-06-25 | 2019-03-01 | 中车青岛四方机车车辆股份有限公司 | Train |
| CN109910621A (en) * | 2019-03-19 | 2019-06-21 | 湖南根轨迹智能科技有限公司 | A kind of magnetic-levitation train is by trajectory obstacle deflector and its magnetic-levitation train |
| KR20190077720A (en) * | 2017-12-26 | 2019-07-04 | 한국철도기술연구원 | an anti-icing device for a collecting shoe of a third-rail power collector |
| CN110049582A (en) * | 2019-05-27 | 2019-07-23 | 扬州阳光风暴新材料有限公司 | Carbon fiber electrical heating snow melt item and its processing method |
| CN209640711U (en) * | 2019-06-05 | 2019-11-15 | 中铁电气化局集团有限公司 | A kind of control system for rail traffic deicing snow-melting system |
-
2020
- 2020-04-09 CN CN202010272788.7A patent/CN111560909A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104183334A (en) * | 2013-05-28 | 2014-12-03 | 苏州南智传感科技有限公司 | Novel composite sensing optical cable |
| JP2015089999A (en) * | 2013-11-05 | 2015-05-11 | 東日本旅客鉄道株式会社 | Snow-melting and antifreezing device for flangeway part within railroad crossing |
| CN204882987U (en) * | 2015-07-24 | 2015-12-16 | 成都亨通光通信有限公司 | Novel spiral steel pipe armor temperature measurement optical cable |
| KR20190077720A (en) * | 2017-12-26 | 2019-07-04 | 한국철도기술연구원 | an anti-icing device for a collecting shoe of a third-rail power collector |
| CN108454464A (en) * | 2018-04-26 | 2018-08-28 | 湖南华品轨道交通有限公司 | A kind of conductor rail deicing system |
| CN208559041U (en) * | 2018-06-25 | 2019-03-01 | 中车青岛四方机车车辆股份有限公司 | Train |
| CN109269650A (en) * | 2018-11-19 | 2019-01-25 | 无锡新润源信息科技有限公司 | Distributed optical fiber temperature measurement equipment and its system |
| CN109910621A (en) * | 2019-03-19 | 2019-06-21 | 湖南根轨迹智能科技有限公司 | A kind of magnetic-levitation train is by trajectory obstacle deflector and its magnetic-levitation train |
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Application publication date: 20200821 |