CN106979962B - Rail-mounted rain and snow detecting device for switch snow melting - Google Patents
Rail-mounted rain and snow detecting device for switch snow melting Download PDFInfo
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- CN106979962B CN106979962B CN201710309570.2A CN201710309570A CN106979962B CN 106979962 B CN106979962 B CN 106979962B CN 201710309570 A CN201710309570 A CN 201710309570A CN 106979962 B CN106979962 B CN 106979962B
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- 238000002844 melting Methods 0.000 title claims abstract description 26
- 230000008018 melting Effects 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 55
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 21
- 229920001875 Ebonite Polymers 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000005260 corrosion Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000007664 blowing Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract description 2
- 239000003292 glue Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000008602 contraction Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
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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
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
A track type rain and snow detection device for railroad switch snow melting solves the technical defects that the existing rain and snow detection device can not detect frozen ice and snow on a train body or snow or ice blocks on the track can be blown by snow outside the track under a windy environment, thereby affecting railroad switch conversion functions and car operation efficiency or running safety, and comprises a mounting clamp and a rain and snow detection sensor; the mounting fixture include left clamp splice and right clamp splice, rain and snow detection sensor is fixed on left clamp splice or right clamp splice with the state installation that is inclined to the horizontal plane, rain and snow detection sensor including sensor master control circuit, sensor master control circuit periphery is irritated there is the soft gum, the embedment has the hard gum outward of soft gum, is provided with the inner shell outward of hard gum. The snow melting device can effectively detect the ice and snow falling onto the steel rail from the train body or snow formed on the rail due to wind blowing, so that the input condition of automatic snow melting is provided for the turnout snow melting device, the operation safety of the train is ensured, and the transportation efficiency is improved.
Description
Technical Field
The invention belongs to the field of railway equipment, and particularly relates to a track type rain and snow detection device for railroad switch snow melting.
Background
The current railway turnout equipment is an important component part in a railway transportation system, smooth switching of the turnout equipment is one of the necessary conditions for guaranteeing safe transportation of railways, and is a precondition for guaranteeing normal passing of railways. Therefore, maintenance of railway turnout is an important link for guaranteeing safe operation of railway.
In winter snowfall weather in cold areas, if railway turnout snow removal is not timely, snow or ice is accumulated in the turnout, so that the tip of a switch tongue and a stock rail cannot be reliably closely attached, the normal running of train receiving operation and shunting operation of a station can be directly influenced, and railway transportation can be interrupted in severe cases. The problem of snow melting of the turnout in winter in severe cold areas becomes a key for influencing the safe and normal operation of the high-speed train. The turnout snow melting device is important equipment for eliminating ice and snow which obstruct turnout switching in severe cold weather and guaranteeing safe switching of turnouts, and has very important significance for guaranteeing safe operation of railway systems and guaranteeing life and property safety of people.
The rain and snow detection device is one of key equipment for realizing automatic snow melting of the turnout snow melting device. The most advanced switch snow melting device at present adopts external temperature and rain and snow conditions as input conditions for starting or closing a snow melting function. When the external temperature is lower than the set steel rail temperature and under the condition of detecting rain and snow, the turnout snow melting device automatically starts a heating function to prevent snow from forming on a track to influence turnout conversion; when the temperature of the steel rail is higher than the set temperature of the steel rail, the heating function is automatically turned off, so that energy sources are saved.
At present, the installation position of a rain and snow sensor applied to the field of the turnout snow melting device is either above an upper control cabinet or above a mast, but no matter which installation mode is adopted, the rain and snow detection device is positioned above a rail surface and can only detect whether the snowfall is actually formed. However, snow and ice frozen on the train body or snow on the outside of the track may be blown onto the track in a windy environment, and such snow and ice cannot be detected by a general rain and snow detecting device. In this case, the switch snow-melting device cannot automatically start the heating function, so that the influence may occur to influence the switch switching function, and the train operation efficiency or the driving safety.
Disclosure of Invention
The invention aims to solve the technical defects that the existing rain and snow detection device cannot detect ice and snow frozen on a train body or snow or ice on the track can be blown by snow or ice on the track under the windy environment, and the switch conversion function and the running efficiency or the running safety of the train are affected.
In order to solve the technical problems, the invention adopts the following technical scheme:
the track type rain and snow detection device for the railroad switch snow melting is characterized by comprising an installation clamp and a rain and snow detection sensor; the mounting fixture comprises a left clamping block and a right clamping block which are clamped on the left side edge and the right side edge of the rail bottom of the steel rail in a matching way, and locking screws for locking and fixing the left clamping block and the right clamping block on the steel rail through the bottom of the rail bottom are arranged between the left clamping block and the right clamping block; the rain and snow detection sensor is arranged and fixed on the left clamping block or the right clamping block in a state of being inclined to the horizontal plane, and is provided with a power cable and a signal cable which are used for connecting the control cabinet; the rain and snow detection sensor comprises a sensor main control circuit, soft rubber is filled at the periphery of the sensor main control circuit, hard rubber is filled outside the soft rubber in a filling mode, and an inner shell is arranged outside the hard rubber.
A heating layer is arranged outside the inner shell, a heat conduction layer is arranged above the heating layer, and a rain and snow detection electrode layer is arranged above the heat conduction layer; the heating layer and the rain and snow detection electrode layer are respectively and electrically connected with the main control circuit.
An outer shell is arranged outside the inner shell; and a snow penetrating hole is formed in the top of the shell and corresponds to the rain and snow detection electrode layer, and a drain hole is formed in the side wall of the shell and corresponds to the rain and snow detection electrode layer.
And a heat insulation layer is arranged between the outer part of the inner shell and the heating layer.
The shell is an anti-corrosion metal shell.
The rain and snow detection sensor is fixedly arranged on the left clamping block or the right clamping block at an included angle of 15 degrees.
The beneficial effects of the invention are as follows: the rain and snow detection sensor is arranged on the steel rail, and can effectively detect ice and snow falling onto the steel rail from a train body or snow formed on a track due to wind blowing, so that an input condition for automatically melting snow is provided for a turnout snow melting device, the operation safety of a train is ensured, and the transportation efficiency is improved. The sensor is installed in an inclined state with the horizontal plane, so that misjudgment of the sensor caused by accumulation of water in the sensor after snow melting is prevented. Because the control circuit in the sensor is protected layer by adopting soft rubber, hard rubber, a composite material inner shell and a corrosion-preventing metal outer shell, the sensor can effectively adapt to the vibration environment generated on the steel rail when a train passes through.
The invention will be further described with reference to the drawings and detailed description.
Drawings
FIG. 1 is a schematic view of a track-type rain and snow detecting device according to the present invention
FIG. 2 is a schematic view of the sensor and the inclination of the horizontal plane
FIG. 3 is a schematic view of a sensor structure according to the present invention
Wherein 1 is a rain and snow detection sensor; 2 is an installation clamp; 3 is a power cable and a signal cable; 4 is a sensor main control circuit; 5 is soft rubber; 6 is hard gum; 7 is a composite material inner shell; 8 is a metal shell; 9 is a rain and snow detection electrode layer; 10 is a heat conducting layer; 11 is a heating layer, 12 is a heat insulating layer.
Detailed Description
The track type rain and snow detecting device for the railroad switch snow melting of the invention is further described in detail below with reference to the accompanying drawings and the specific embodiments. It should be noted that: the technical features or combinations of technical features described in the present embodiment should not be regarded as being isolated, and they may be combined with each other to achieve a better technical effect, and should be understood as being the scope of the present invention.
As shown in fig. 1 and 2, the present embodiment provides a track type rain and snow detecting device for railroad switch snow melting, which comprises a mounting fixture 2 and a rain and snow detecting sensor 1. The mounting fixture 2 comprises a left clamping block and a right clamping block which are clamped on the left side edge and the right side edge of the rail bottom of the steel rail in a matching way, and locking screws for locking and fixing the left clamping block and the right clamping block on the steel rail through the bottom of the rail are arranged between the left clamping block and the right clamping block. The rain and snow detection sensor 1 is installed and fixed on the left clamping block or the right clamping block in a state of being inclined to the horizontal plane, and the preferable scheme is as follows: the rain and snow detection sensor is arranged and fixed on the left clamping block or the right clamping block at an included angle of 15 degrees.
The rain and snow detection sensor 1 is provided with a power cable and a signal cable 3 which are used for being connected with a control cabinet. In the application process, the control cabinet is generally arranged near the steel rail, the rain and snow signals detected by the rain and snow detection sensors 1 are sent to the control cabinet through the signal cable 3, and the control cabinet can process the signals sent by one or more rain and snow detection sensors 1 and judge the rain and snow information. Only necessary signal processing components are arranged in each rain and snow detection sensor 1, and processing information is sent into a control cabinet as far as possible for processing, so that the sensors are small and are suitable for being installed on steel rails. The power cable and the signal cable 3 between the rain and snow detection sensor 1 and the peripheral control cabinet are preferably the same cable, the connecting wires of the control cabinet and the rain and snow detection sensor 1 are reduced, the size of the sensor is further reduced, the power cable and the signal cable 3 are shielding cables, one end of each shielding layer is connected with the ground, and external interference invasion is prevented. A control cabinet can receive and process signals of a plurality of rain and snow detection sensors 1, so that power cables and signal cables can be distributed and installed at a plurality of different positions of a turnout. The rain and snow detection sensor 1 is installed in an inclined state with the horizontal plane, and water formed after snow or ice is melted can flow away in time to be discharged, so that the phenomenon that rainwater is accumulated at the detection part of the sensor to cause misjudgment of the sensor is prevented.
As shown in fig. 3, the rain and snow detecting sensor 1 includes a sensor main control circuit 4, and soft glue 5 is filled around the sensor main control circuit 4, where the soft glue 5 can prevent expansion with heat and contraction with cold of the glue from stretching or extruding electronic elements of the sensor main control circuit 4 when the temperature on the track changes, and damage or poor contact is caused to the electronic elements, thereby affecting the reliable operation of the rain and snow sensor.
The hard glue 6 is filled and sealed outside the soft glue 5, and the inner shell 7 is arranged outside the hard glue 6; the hard glue 6 is filled and sealed between the inner shell 7 and the soft glue 5, so that the damage of peripheral equipment to the sensor main control circuit 4 can be prevented, and the circuit board of the whole sensor main control circuit 4 can be protected.
The outer part of the inner shell 7 is provided with an outer shell 8; in order to prevent the difference of thermal expansion coefficient and cold contraction coefficient between different substances from being too large, so that the inner shell 7 is made of a composite material in the process of thermal expansion and cold contraction. In order to prevent damage to the invention by external hard objects during operation on the rails, an anti-corrosion metal outer shell 8 is used outside the inner shell 7.
The outside of inner shell 7 be equipped with zone of heating 11, be equipped with insulating layer 12 between the outside of inner shell 7 and zone of heating 11 preferably, insulating layer 12 is made for thermal insulation material, prevents heat conduction to sensor main control circuit 4, insulating layer 12 still prevents that zone of heating 11 from influencing the life-span of combined material inner shell. A heat conduction layer 10 is arranged above the heating layer 11, and a rain and snow detection electrode layer 9 is arranged above the heat conduction layer 10; the heating layer 11 and the rain and snow detection electrode layer 9 are respectively and electrically connected with the sensor main control circuit 4.
And a snow penetrating hole is formed in the top of the shell 8 and corresponds to the rain and snow detection electrode layer 9, and a drain hole is formed in the side wall of the shell and corresponds to the rain and snow detection electrode layer. When snowfall or snowfall occurs, the sensor can fall on the surface of the rain and snow detection electrode layer 9 through the snow penetrating holes, and signals with different potentials are input at the CPU input end of the sensor main control circuit 4; when rainfall falls on the surface of the rain and snow detection electrode layer 9, the CPU input end of the sensor main control circuit 4 directly presents signals with different potentials; when the snow falls on the surface of the rain and snow detection electrode layer 9, the heating layer 11 heats the rain and snow detection electrode layer 9 by the heating layer 11 and the heat conduction layer 10 under the control of the rain and snow detection electrode layer 9, so that the snow is melted into water, and then signals with different potentials are directly displayed at the CPU input end of the rain and snow detection electrode layer 9.
The sensor main control circuit 4 receives the signals of the rain and snow detection electrode layer 9, simply processes the signals, sends the signals to the control cabinet, and the control cabinet analyzes and processes the received signals to judge whether snow or ice exists.
The heat conducting layer 10 can have a sealing protection effect on the heating layer 11, isolate rainwater and prevent the rainwater from reaching the heating layer 11 to be damaged.
The rain and snow detection sensor 1 is arranged on a steel rail, and when a train passes through, the train can vibrate very strongly, soft rubber 5 is poured on the periphery of the sensor main control circuit 4, so that the sensor main control circuit 4 is slowed down and prevented from being damaged by vibration. After the soft rubber 5 is filled with the hard rubber 6 to strengthen the protection effect on the sensor main control circuit 4, the absorption is resisted through the hard rubber 6 firstly and then the soft rubber 5 is absorbed after the train vibration is generated, so that the control circuit 4 is more effectively protected. The composite inner shell also has a damping effect on train vibration. By the aid of the layer-by-layer train vibration reduction, influence of vibration on the sensor main control circuit 4 can be effectively avoided, and the rain and snow detection sensor 1 can be suitable for being installed in a steel rail environment. The periphery of the composite material inner shell is also provided with an anti-corrosion metal outer shell 8, and the metal outer shell 8 is made of stainless steel materials, has a protective effect on corrosion of the sensor under external climatic conditions and environmental conditions, and also has a train vibration resistance effect.
The scope of the preferred embodiments of the present invention includes additional implementations in which functions may be performed out of the order described, including in a substantially simultaneous manner or in an order that is reverse, depending on the functionality involved, as would be understood by one of skill in the art of embodiments of the present invention. The description of the embodiments is intended to be illustrative only and not to be taken as a limitation, and it is within the scope of the invention for those skilled in the art to understand the technical aspects of the embodiments.
Claims (4)
1. The track type rain and snow detection device for the railroad switch snow melting is characterized by comprising an installation clamp and a rain and snow detection sensor; the mounting fixture comprises a left clamping block and a right clamping block which are clamped on the left side edge and the right side edge of the rail bottom of the steel rail in a matching way, and locking screws for locking and fixing the left clamping block and the right clamping block on the steel rail through the bottom of the rail bottom are arranged between the left clamping block and the right clamping block; the rain and snow detection sensor is arranged and fixed on the left clamping block or the right clamping block in a state of being inclined to the horizontal plane, and is provided with a power cable and a signal cable which are used for connecting the control cabinet; the rain and snow detection sensor comprises a sensor main control circuit, wherein soft rubber is filled at the periphery of the sensor main control circuit, hard rubber is filled outside the soft rubber in a filling manner, and an inner shell is arranged outside the hard rubber; a heating layer is arranged outside the inner shell, a heat conduction layer is arranged above the heating layer, and a rain and snow detection electrode layer is arranged above the heat conduction layer; the rain and snow detection electrode layer generates signals with different potentials after being heated and melted into water; the heating layer and the rain and snow detection electrode layer are respectively and electrically connected with the main control circuit;
an outer shell is arranged outside the inner shell; the top of the shell is provided with a snow penetrating hole corresponding to the rain and snow detection electrode layer, and the side wall of the shell is provided with a drain hole corresponding to the rain and snow detection electrode layer.
2. The track type rain and snow detecting device for railroad switch snow melting according to claim 1, wherein: and a heat insulation layer is arranged between the outer part of the inner shell and the heating layer.
3. The track type rain and snow detecting device for railroad switch snow melting according to claim 1, wherein: the shell is an anti-corrosion metal shell.
4. The track type rain and snow detecting device for railroad switch snow melting according to claim 1, wherein: the rain and snow detection sensor is fixedly arranged on the left clamping block or the right clamping block at an included angle of 15 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710309570.2A CN106979962B (en) | 2017-05-04 | 2017-05-04 | Rail-mounted rain and snow detecting device for switch snow melting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710309570.2A CN106979962B (en) | 2017-05-04 | 2017-05-04 | Rail-mounted rain and snow detecting device for switch snow melting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106979962A CN106979962A (en) | 2017-07-25 |
| CN106979962B true CN106979962B (en) | 2023-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710309570.2A Active CN106979962B (en) | 2017-05-04 | 2017-05-04 | Rail-mounted rain and snow detecting device for switch snow melting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108592995B (en) * | 2018-04-23 | 2020-09-29 | 黄河科技学院 | Chemical industry park environmental monitoring device protector based on loRa wide area network |
| CN111638567A (en) * | 2020-06-04 | 2020-09-08 | 水利部南京水利水文自动化研究所 | Support single-point and multi-point induction's multilayer timing weighing type sleet gauge |
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|---|---|---|---|---|
| US3974993A (en) * | 1974-06-10 | 1976-08-17 | Eltra Kg Leicht & Trambauer | Railway track switch heating arrangement |
| US4051466A (en) * | 1974-07-12 | 1977-09-27 | Eltra Kg Leicht & Trambauer | Arrangement for detecting the presence of snow, ice and other freezing precipitation, particularly on railway track structures, and the like |
| US4656333A (en) * | 1984-12-28 | 1987-04-07 | Murphy John P | Thin profile snow, sleet and moisture sensing detector |
| JPH075135A (en) * | 1991-08-26 | 1995-01-10 | Densei:Kk | Method for discriminating between rain and snow |
| JP3037559U (en) * | 1996-11-08 | 1997-05-20 | 北海バネ株式会社 | Snowfall sensor output signal processing circuit |
| JP2003114283A (en) * | 2001-10-03 | 2003-04-18 | Sparkling Foton:Kk | Snow accumulation monitoring device, and ice and snow melting system |
| JP3112271U (en) * | 2004-12-16 | 2005-08-11 | 北海バネ株式会社 | Snowfall sensor |
| CN201262649Y (en) * | 2008-09-03 | 2009-06-24 | 西安铁路信号工厂 | Device for monitoring rain and snow |
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| CN103603244A (en) * | 2013-12-04 | 2014-02-26 | 大连理工大学 | Special clamp for measuring unit of steel rail wireless sensor network |
| CN104330115A (en) * | 2014-11-21 | 2015-02-04 | 天津泰特热控科技有限公司 | Ice and snow sensor |
| CN105067147A (en) * | 2015-07-14 | 2015-11-18 | 深圳科安达电子科技股份有限公司 | Track temperature monitoring system |
| CN206906308U (en) * | 2017-05-04 | 2018-01-19 | 深圳科安达电子科技股份有限公司 | A kind of melting snow on turnout junction rail mounted sleet detection device |
-
2017
- 2017-05-04 CN CN201710309570.2A patent/CN106979962B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3974993A (en) * | 1974-06-10 | 1976-08-17 | Eltra Kg Leicht & Trambauer | Railway track switch heating arrangement |
| US4051466A (en) * | 1974-07-12 | 1977-09-27 | Eltra Kg Leicht & Trambauer | Arrangement for detecting the presence of snow, ice and other freezing precipitation, particularly on railway track structures, and the like |
| US4656333A (en) * | 1984-12-28 | 1987-04-07 | Murphy John P | Thin profile snow, sleet and moisture sensing detector |
| JPH075135A (en) * | 1991-08-26 | 1995-01-10 | Densei:Kk | Method for discriminating between rain and snow |
| JP3037559U (en) * | 1996-11-08 | 1997-05-20 | 北海バネ株式会社 | Snowfall sensor output signal processing circuit |
| JP2003114283A (en) * | 2001-10-03 | 2003-04-18 | Sparkling Foton:Kk | Snow accumulation monitoring device, and ice and snow melting system |
| JP3112271U (en) * | 2004-12-16 | 2005-08-11 | 北海バネ株式会社 | Snowfall sensor |
| CN201262649Y (en) * | 2008-09-03 | 2009-06-24 | 西安铁路信号工厂 | Device for monitoring rain and snow |
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| CN103603244A (en) * | 2013-12-04 | 2014-02-26 | 大连理工大学 | Special clamp for measuring unit of steel rail wireless sensor network |
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| CN206906308U (en) * | 2017-05-04 | 2018-01-19 | 深圳科安达电子科技股份有限公司 | A kind of melting snow on turnout junction rail mounted sleet detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106979962A (en) | 2017-07-25 |
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