CN101852870A - Multi-function highway ice and snow sensor - Google Patents
Multi-function highway ice and snow sensor Download PDFInfo
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- CN101852870A CN101852870A CN200910061367A CN200910061367A CN101852870A CN 101852870 A CN101852870 A CN 101852870A CN 200910061367 A CN200910061367 A CN 200910061367A CN 200910061367 A CN200910061367 A CN 200910061367A CN 101852870 A CN101852870 A CN 101852870A
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Abstract
The invention discloses a multi-function highway ice and snow sensor, and relates to a meteorological sensor. The multi-function highway ice and snow sensor comprises a metal tank body, a stainless steel bracket, an ice and snow sensing module composed of an ice and snow sensing plate and an ice and snow sensing signal conditioning circuit, a stainless steel water holding device, a first PTC (Positive Temperature Coefficient) heating element, a second PTC heating element, a water quantity measurement module composed of a water quantity measurement sensitive element and a water quantity measurement signal conditioning circuit, a water outlet trough, an environmental temperature measurement module, a microprocessor, a system circuit board, a time measurement circuit, an RS_232 communication interface module, a first relay circuit and a second relay circuit. The multi-function highway ice and snow sensor can be used for the comprehensive measurement of snow, rain and fog in multiple occasions, and has the advantages of wide measurement range, high accuracy, no abrasion of moving members, high reliability, long service life, low cost and high performance ratio.
Description
Technical field
The present invention relates to a kind of meteorological sensor, relate in particular to a kind of multi-function highway ice and snow sensor.
Background content
It is the most serious traffic hazard of highway that driving vehicle knocks into the back.The visibility reason that causes the meteorologic factor of rear-end collision not only frost mist to be arranged to be brought, sleety weather especially heavy rain severe snow also can significantly reduce visibility.In addition, road is wetting, freeze to make coefficient of road adhesion to reduce, and the pavement skid resistance ability descends significantly, also is the important meteorologic factor that causes rear-end collision.Set up the ice and snow monitoring at highway, the ice and snow weather information in real-time release monitoring highway section, and the monitoring highway section traffic safety parameter that generates by the ice and snow informix: comprise road, safe distance between vehicles and speed of a motor vehicle threshold information, to the prevention vehicle rear-end collision, guarantee that traffic safety has significance.Yet the ice and snow monitoring does not still have right sensors, still rests on the artificial observation stage basically.Therefore, quickening the research and development ice and snow sensor, in order to the accumulated snow of monitoring highway and the change of visibility, is traffic weather monitoring project and the facility that the prevention vehicle rear-end collision can not be ignored.
In addition, because the meteorological unevenness that distributes in each highway section of highway, if lay the weather monitoring point in highway multichannel section, can the infrastructure cost of ice and snow sensor be a bottleneck problem that put into practice, also is the key point of ice and snow sensor structural design certainly.
Summary of the invention
Purpose of the present invention just is to overcome the shortcoming and defect that prior art exists, and a kind of multi-function highway ice and snow sensor is provided.The present invention can not only the Quantitative Monitoring road snowfall, snowfall intensity and snowfall last etc., monitor all multi-functional in one but also have snow melt, rain, relative humidity and environment temperature, solved the problem of sensor construction cost preferably.
The object of the present invention is achieved like this:
Adopt the full electronic structure, no movement parts wearing and tearing, it is convenient that measuring accuracy height, installation are proofreaied and correct, and can be according to the variation of ice and snow parameter, automatically generate or adjust the safe distance between vehicles in the different highway sections of highway and the threshold value of warning of the speed of a motor vehicle, for the generation of accidents such as early warning is knocked into the back, hypervelocity with the rate that improves that the road is clear, scientific basis and safety assurance are provided, this sensor also can be conveniently used in communications and transportation occasions such as airport, railway.
Specifically, the present invention includes metal can, stainless steel stent, the ice and snow induction module of forming by ice and snow tablet and ice and snow induced signal modulate circuit, the stainless steel raingauge receiver, first and second PTC heater element, the measure of water module of forming by measure of water sensitive element and measure of water signal conditioning circuit, effluent trough, the ambient temperature measurement module, microprocessor, system circuit board, time measuring circuit, RS_232 communication interface modules and first and second relay circuit;
In metal can, from top to bottom, be disposed with tilted-putted ice and snow tablet, stainless steel raingauge receiver, measure of water sensitive element and effluent trough by stainless steel stent;
Be respectively arranged with a PTC heater element and the 2nd PTC heater element at the stainless steel raingauge receiver and the ice and snow tablet back side, the ice and snow of thawing or rainwater flow into the measure of water sensitive element, and flow out through effluent trough;
Outer wall at metal can is provided with the ambient temperature measurement module, is provided with system circuit board at the inwall of metal can; The ice and snow induced signal modulate circuit that system circuit board is provided with microprocessor and is connected with microprocessor respectively, measure of water signal conditioning circuit, time measuring circuit, RS_232 communication interface modules and first and second relay circuit NK, NJ;
The first relay circuit NK is connected with a PTC heater element PTC1, and the second relay circuit NJ is connected with the 2nd PTC heater element PTC2.
Principle of work of the present invention is:
The environment temperature of measuring when the ambient temperature measurement module is higher than zero centigrade, the sampling of ice and snow tablet is debated and is known when precipitation is arranged, raingauge receiver is introduced the measure of water sensitive element in order to measure parameters such as quantity of precipitation, precipitation intensity, precipitation duration with the rainwater of collecting, microprocessor generates Vehicle Speed, following distance threshold limit automatically according to the variation of this highway section, this moment precipitation parameter, and is sent to PC by the RS_232 communication interface modules and shows parameter such as precipitation or through the GSM/GPRS module this remote data is sent to control terminal again.
The environment temperature of measuring when the ambient temperature measurement module is higher than zero centigrade, the sampling of ice and snow tablet is debated and is known when frost mist is arranged, the ice and snow tablet is according to the variation of relative humidity, the size of quantitative measurment frost mist, and in the unit interval, start the PTC heater element at the ice and snow tablet back side, rapidly heat drying ice and snow tablet to be remeasuring relative humidity variations, and and is sent to PC by the RS_232 communication interface modules and shows relative humidity or through the GSM/GPRS module this remote data is sent to control terminal again.
The environment temperature of measuring when the ambient temperature measurement module less than, equal zero centigrade, the sampling of ice and snow tablet is debated and is known when ice and snow is arranged, microprocessor starts the PTC heater element at the ice and snow tablet back side in the unit interval, heat the ice and snow tablet rapidly, the ice and snow that melts is introduced the measure of water sensitive element in order to measure snowfall by raingauge receiver, snowfall intensity, parameters such as snowfall lasts, microprocessor is according to this highway section, the variation of this moment ice and snow parameter generates Vehicle Speed automatically, the following distance threshold limit, and be sent to PC or through the GSM/GPRS module remote data sent to control terminal again by the data of RS_232 communication interface modules after with computing.
The present invention has following advantage and good effect:
1, can be used for snow that multiple occasion rains,, the mist composite measurement, measurement range is wide, precision is high;
2, no movement parts wearing and tearing, reliability height, long service life;
3, cheap, the cost performance height.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a microprocessor control structure block scheme;
Fig. 3 A is ice and snow tablet structural representation (main looking);
Fig. 3 B is that the ice and snow tablet is installed in structural representation on the stainless steel stent (side-looking);
Fig. 4 is an ice and snow induced signal modulate circuit schematic diagram;
Fig. 5 is a measure of water signal conditioning circuit schematic diagram;
Fig. 6 is the microprocessor control circuit schematic diagram.
Wherein:
The 00-metal can;
The 10-stainless steel stent;
20-ice and snow induction module,
21-ice and snow tablet,
22-ice and snow induced signal modulate circuit;
30-stainless steel raingauge receiver;
50-measure of water module,
51-measure of water sensitive element,
52-measure of water signal conditioning circuit;
The 60-effluent trough;
70-ambient temperature measurement module;
The 80-microprocessor;
The 90-system circuit board;
The 100-time measuring circuit;
The 110-RS_232 communication interface modules;
PTC1-the one PTC heater element, PTC2-the 2nd PTC heater element;
NK-first relay circuit, NJ-second relay circuit.
Embodiment
Below in conjunction with accompanying drawing and embodiment, to the detailed description of the invention:
One, general structure
The present invention is arranged on each ice and snow monitoring point of highway relevant road segments.
As Fig. 1,2, the present invention includes metal can 00, stainless steel stent 10, the ice and snow induction module of forming by ice and snow tablet 21 and ice and snow induced signal modulate circuit 22 20, stainless steel raingauge receiver 30, first and second PTC heater element PTC1, PTC2, the measure of water module of forming by measure of water sensitive element 51 and measure of water signal conditioning circuit 52 50, effluent trough 60, ambient temperature measurement module 70, microprocessor 80, system circuit board 90, time measuring circuit 100, RS_232 communication interface modules 110 and first and second relay circuit NK, NJ;
In metal can 00, from top to bottom, be disposed with tilted-putted ice and snow tablet 21, stainless steel raingauge receiver 30, measure of water sensitive element 51 and effluent trough 60 by stainless steel stent 10;
Be respectively arranged with a PTC heater element PTC1 and the 2nd PTC heater element PTC2 at the stainless steel raingauge receiver 30 and ice and snow tablet 21 back sides, the ice and snow of thawing or rainwater flow into measure of water sensitive element 51, and flow out through effluent trough 60;
Outer wall at metal can 00 is provided with ambient temperature measurement module 70, is provided with system circuit board 90 at the inwall of metal can 00; The ice and snow induced signal modulate circuit 22 that system circuit board 90 is provided with microprocessor 80 and is connected with microprocessor 80 respectively, measure of water signal conditioning circuit 52, time measuring circuit 100, RS_232 communication interface modules 110 and first and second relay circuit NK, NJ;
The first relay circuit NK is connected with a PTC heater element PTC1, and the second relay circuit NJ is connected with the 2nd PTC heater element PTC2.
Two, functional block structure
1, the ice and snow induction module 20
As Fig. 2, ice and snow induction module 20 is made up of preceding latter linked ice and snow tablet 21 and ice and snow induced signal modulate circuit 22.
As Fig. 3 A, Fig. 3 B, ice and snow tablet 21 is made of two groups of chaff N1, the N2 being the circular ring type cross structure and metallizing chaff N1, the insulation on N2 surface, the water-proof coating that are embedded on the insulation material negative 211; Two groups of chaff N1, N2 link to each other with the input end of ice and snow induced signal modulate circuit 22 by two leads respectively.
As Fig. 4, ice and snow induced signal modulate circuit 22 is made up of metering circuit 226, analog switch 227, active low-pass filter 228 and the in-phase amplifier 229 of sine-wave generator 221, follower 222, inverting amplifier 223, sinusoidal wave phase shifter 224, sine wave/square wave converter 225, ice and snow tablet:
Sine-wave generator 221 output termination followers 222 input ends; The output terminal of follower 222 is divided into two-way: one tunnel metering circuit 226 through ice and snow tablet 21 access ice and snow tablets, and another road connects sinusoidal wave phase shifter 224 input ends through see-saw circuit 223; Sinusoidal wave phase shifter 224 exports sine wave/square wave converter 225 to and finishes the switch control end that exports analog switch 227 after the waveform transformation to, the input end of analog switch 227 links to each other with the output terminal of ice and snow tablet metering circuit 226, analog switch 227 exports active low-pass filter 228 input ends to, active low-pass filter 228 export in-phase amplifier 229 input ends to; The output terminal V1N of in-phase amplifier 229 links to each other with the AIN0 of microprocessor 80 end.
Can be through the ice and snow tablet 21 after waterproof and the high insulation processing easily with frost, mist, rain, snow changes to be converted to distinguishes tangible electric signal, become digital signal to offer microprocessor 80 by the simulating signal nursed one's health through 16 A/D circuit conversion of microprocessor 80 inside and debate computing and linear correction of knowing, microprocessor 80 changes according to the detected value of frost mist and ice and snow, adopt different timing heat time heating times respectively, automatically start a PTC heater element PTC1 at stainless steel raingauge receiver 30 back sides or the 2nd PTC heater element PTC2 at ice and snow tablet 21 back sides, rapid dry ice and snow tablet 21 changes to remeasure relative humidity and snowfall, and by RS_232 communication interface modules 110 data after the computing is sent to PC or through the GSM/GPRS module remote data is sent to control terminal again.
2, the measure of water module 50
As Fig. 2, measure of water module 50 is made up of preceding latter linked measure of water sensitive element 51 and measure of water signal conditioning circuit 52.
Described measure of water sensitive element 51 is made up of the metal polar plate of multi-disc after insulation is handled.
As Fig. 5, measure of water signal conditioning circuit 52 is made up of sine-wave generator 521, follower 522, inverting amplifier 523, sinusoidal wave phase shifter 524, measure of water circuit 525, de-noising amplifier 526 and in-phase amplifier 527:
The output terminal of sine-wave generator 521 links to each other with the input end of follower 522; The output terminal of follower 522 is divided into two-way: the one tunnel links to each other with reference input 10 pin of de-noising amplifier 526; The input end of inverting amplifier 523 is inserted on another road; The output terminal of inverting amplifier 523 links to each other with the input end of measure of water circuit 225 behind measure of water sensitive element 51; The output terminal of measure of water circuit 225 links to each other with in-phase input end 1 pin of de-noising amplifier 526; De-noising amplifier 526 output termination homophase in-phase amplifiers 527; The output terminal of in-phase amplifier 527 links to each other with the AIN1 end of microprocessor 80.
Rainwater and melt after ice and snow after measure of water sensitive element 51 and measure of water signal conditioning circuit 52 are converted to analog electrical signal, 16 A/D circuit conversion by microprocessor 80 inside become digital signal to offer that microprocessor 80 carries out rain (snow) type, rain (snow) amount is debated and known computing and linearity correction.
3, first and second PTC heater element PTC1, PTC2
First and second PTC heater element PTC1, PTC2 are common component.
4, the ambient temperature measurement module 70
Ambient temperature measurement module 70 is selected the DS1820 digital temperature sensor for use.
5, time measuring circuit 100
6, the RS_232 communication interface modules 110
RS_232 communication interface modules 110 is a common circuit.
7, first and second relay circuit NK, NJ
First and second relay circuit NK, NJ are common circuit.
8, microprocessor 80
Microprocessor 80 is selected C8051F060 type high-speed mixing signal ISP FLASH microcontroller for use.
As Fig. 2,6, the course of work of microprocessor 80 is as follows:
Microprocessor 80 is connected with the DS1820 digital temperature sensor by P10, P11 mouth, in order to direct measurement and real-time monitoring of environmental temperature variation.
Microprocessor 80 links to each other with the time measuring circuit that is made of DS1302 by P12, P13, P14 mouth, to guarantee the timestamp information record of image data.
Microprocessor 80 links to each other with RS_232 communication interface modules 110 by P00, P01 pin.
Microprocessor 80 links to each other with the coil-end of first and second relay circuit NK, NJ by the collector of transistor 3DG4 respectively by P15, P16 again, and the normally opened contact of two relays is controlled the unlatching of first and second PTC heater element PTC1, PTC2 respectively.
Microprocessor 80 passes through AIN0, the AIN1 bipod is connected to the analog signal output of ice and snow induced signal modulate circuit 22 and measure of water signal conditioning circuit 52 respectively, and finish analog to digital conversion by 16 A/D converters of two-way of microprocessor 80 inside, microprocessor 80 is according to rain (snow) type, computing and linear correction value are known in debating of rain (snow) amount, after tabling look-up and moving interpolation formula, automatically generate Vehicle Speed, the following distance threshold limit, and by the RS_232 interface circuit related data is sent to PC or through the GSM/GPRS module remote data is sent to control terminal again.
9, metal can 00
Metal can 00 is a kind of canister.
10, stainless steel stent 10
11, the stainless steel raingauge receiver 30
Stainless steel raingauge receiver 30 is a kind of basin-like bodies.
12, effluent trough 60
Three, the course of work is described
The temperature value that microprocessor is gathered with fixed cycle monitor temperature sensor DS1820 behind the system initialization.
(1) when this is worth greater than zero degrees celsius, can reliably frost mist, rain variation be converted to the tangible electric signal of difference through the ice and snow tablet after waterproof and the high insulation processing, converted to by A/D by the simulating signal nursed one's health and to offer microprocessor after the digital signal and debate computing and linear correction of knowing, if the ice and snow tablet is when detecting frost mist; Microprocessor changes according to the detected value of frost mist, starts the PTC heater element at the ice and snow tablet back side automatically, and rapid dry ice and snow tablet is to remeasure relative humidity variations.And be sent to PC or again through the long-range control terminal that sends to of GSM/GPRS module by the frost mist data of RS_232 interface circuit after with computing.If the ice and snow tablet is when detecting rainfall; Pass through raingauge receiver, rainwater is guided to after the measure of water circuit module is converted to analog electrical signal, 16 A/D circuit conversion by microprocessor internal become digital signal to offer microprocessor CPU to carry out rainfall pattern, rainfall is debated computing and linear correction of knowing, microprocessor is according to computing and linear correction value, through tabling look-up and moving interpolation formula, automatically generate Vehicle Speed, the following distance threshold value, and pass through the RS_232 communication interface circuit with rainfall amount, rainfall intensity, rainfall beginning and ending time and car speed, related datas such as following distance threshold value are sent to PC or send to control terminal by GSM/GPRS module wireless remote again.
(2) be equal to or less than zero degrees celsius when this value, if the ice and snow tablet is when detecting ice and snow; Microprocessor changes according to the detected value of ice and snow, adopt different timing heat time heating times respectively, automatically start the PTC heater element at the ice and snow tablet and the raingauge receiver back side, ice and snow after the heating and melting is converted to analog electrical signal through measure of water sensitive element and signal conditioning circuit, and supplies with by 16 A/D change-over circuits of microprocessor internal that CPU carry out the snow type, snowfall is debated computing and linear correction of knowing.Microprocessor is according to computing and linear correction value, after tabling look-up and moving interpolation formula, generate Vehicle Speed, following distance threshold value automatically, and by the RS_232 communication interface circuit related datas such as snowfall, snowfall intensity, snowfall beginning and ending time and car speed, following distance threshold value are sent to PC or send to control terminal by GSM/GPRS module wireless remote again, thereby provide each highway section real-time weather information for the safe speed of a motor vehicle threshold value and the following distance threshold value of the ice and snow weather of highway.
Claims (3)
1. multi-function highway ice and snow sensor is characterized in that:
Comprise metal can (00), stainless steel stent (10), the ice and snow induction module of forming by ice and snow tablet (21) and ice and snow induced signal modulate circuit (22) (20), stainless steel raingauge receiver (30), first, two PTC heater element (PTC1, PTC2), the measure of water module of forming by measure of water sensitive element (51) and measure of water signal conditioning circuit (52) (50), effluent trough (60), ambient temperature measurement module (70), microprocessor (80), system circuit board (90), time measuring circuit (100), RS_232 communication interface modules (110) and first, two relay circuit (NK, NJ);
In metal can (00), from top to bottom, be disposed with tilted-putted ice and snow tablet (21), stainless steel raingauge receiver (30), measure of water sensitive element (51) and effluent trough (60) by stainless steel stent (10);
Be respectively arranged with a PTC heater element (PTC1) and the 2nd PTC heater element (PTC2) at the stainless steel raingauge receiver (30) and ice and snow tablet (21) back side, ice and snow that melts or rainwater flow into measure of water sensitive element (51), and flow out through effluent trough (60);
Outer wall at metal can (00) is provided with ambient temperature measurement module (70), is provided with system circuit board (90) at the inwall of metal can (00); The ice and snow induced signal modulate circuit (22) that system circuit board (90) is provided with microprocessor (80) and is connected with microprocessor (80) respectively, measure of water signal conditioning circuit (52), time measuring circuit (100), RS 232 communication interface moduless (110) and first and second relay circuit (NK, NJ);
First relay circuit (NK) is connected with a PTC heater element (PTC1), and second relay circuit (NJ) is connected with the 2nd PTC heater element (PTC2).
2. a kind of multi-function highway ice and snow sensor according to claim 1 is characterized in that:
Ice and snow induction module (20) is made up of preceding latter linked ice and snow tablet (21) and ice and snow induced signal modulate circuit (22);
Described ice and snow tablet (21) is by being embedded in the two groups of chaffs (N1, N2) that are the circular ring type cross structure on the insulation material negative (211) and applying the surperficial insulation of two groups of chaffs (N1, N2), water-proof coating formation; Two groups of chaffs (N1, N2) link to each other with the input end of ice and snow induced signal modulate circuit (22) by two leads respectively;
Described ice and snow induced signal modulate circuit (22) is made up of metering circuit (226), analog switch (227), active low-pass filter (228) and the in-phase amplifier (229) of sine-wave generator (221), follower (222), inverting amplifier (223), sinusoidal wave phase shifter (224), sine wave/square wave converter (225), ice and snow tablet:
Sine-wave generator (221) output termination follower (222) input end; The output terminal of follower (222) is divided into two-way: one tunnel metering circuit (226) through ice and snow tablet (21) access ice and snow tablet, and another road connects sinusoidal wave phase shifter (224) input end through see-saw circuit (223); Sinusoidal wave phase shifter (224) exports sine wave/square wave converter (225) to and finishes the switch control end that exports analog switch (227) after the waveform transformation to, the input end of analog switch (227) links to each other with the output terminal of ice and snow tablet metering circuit (226), analog switch (227) exports active low-pass filter (228) input end to, active low-pass filter (228) export in-phase amplifier (229) input end to; The output terminal V1N of in-phase amplifier (229) links to each other with the AIN0 end of microprocessor (80).
3. a kind of multi-function highway ice and snow sensor according to claim 1 is characterized in that:
Measure of water module (50) is made up of preceding latter linked measure of water sensitive element (51) and measure of water signal conditioning circuit (52);
Described measure of water sensitive element (51) is made up of the metal polar plate of multi-disc after insulation is handled;
Described measure of water signal conditioning circuit (52) is made up of sine-wave generator (521), follower (522), inverting amplifier (523), sinusoidal wave phase shifter (524), measure of water circuit (525), de-noising amplifier (526) and in-phase amplifier (527);
The output terminal of sine-wave generator (521) links to each other with the input end of follower (522); The output terminal of follower (522) is divided into two-way: the one tunnel links to each other with reference input 10 pin of de-noising amplifier (526); The input end of inverting amplifier (523) is inserted on another road; The output terminal of inverting amplifier (523) links to each other with the input end of measure of water circuit (225) behind measure of water sensitive element (51); The output terminal of measure of water circuit (225) links to each other with in-phase input end 1 pin of de-noising amplifier (526); De-noising amplifier (526) output termination homophase in-phase amplifier (527); The output terminal of in-phase amplifier (527) links to each other with the AIN1 end of microprocessor (80).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100613673A CN101852870B (en) | 2009-04-01 | 2009-04-01 | Multi-function highway ice and snow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100613673A CN101852870B (en) | 2009-04-01 | 2009-04-01 | Multi-function highway ice and snow sensor |
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| Publication Number | Publication Date |
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| CN101852870A true CN101852870A (en) | 2010-10-06 |
| CN101852870B CN101852870B (en) | 2012-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100613673A Expired - Fee Related CN101852870B (en) | 2009-04-01 | 2009-04-01 | Multi-function highway ice and snow sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296517A (en) * | 2011-06-10 | 2011-12-28 | 无锡睿思凯科技有限公司 | Device for automatically removing ice and snow on ramp by using solar cell as power supply |
| CN104330115A (en) * | 2014-11-21 | 2015-02-04 | 天津泰特热控科技有限公司 | Ice and snow sensor |
| CN109683210A (en) * | 2017-10-19 | 2019-04-26 | 西安铁路信号有限责任公司 | A kind of intelligent weather station for turnout snow melting system |
-
2009
- 2009-04-01 CN CN2009100613673A patent/CN101852870B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296517A (en) * | 2011-06-10 | 2011-12-28 | 无锡睿思凯科技有限公司 | Device for automatically removing ice and snow on ramp by using solar cell as power supply |
| CN104330115A (en) * | 2014-11-21 | 2015-02-04 | 天津泰特热控科技有限公司 | Ice and snow sensor |
| CN104330115B (en) * | 2014-11-21 | 2016-06-08 | 天津泰特热控科技有限公司 | Ice and snow sensor |
| CN109683210A (en) * | 2017-10-19 | 2019-04-26 | 西安铁路信号有限责任公司 | A kind of intelligent weather station for turnout snow melting system |
| CN109683210B (en) * | 2017-10-19 | 2024-06-11 | 西安铁路信号有限责任公司 | Intelligent weather station for turnout snow melting system |
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| Publication number | Publication date |
|---|---|
| CN101852870B (en) | 2012-02-08 |
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