CN101246637A - Sensor node used for railway frozen earth roadbed safety monitoring and its operation method - Google Patents
Sensor node used for railway frozen earth roadbed safety monitoring and its operation method Download PDFInfo
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Abstract
The present invention provides a sensor node for safety monitoring of rail way frost soil subgrade and its working method, including an inter electric connecting sensor module, a processing communication module and an energy supplying module. The printed board of the first sensor module is set with multiple digital temperature sensors, a humiture sensor, for the distributed measurement of the permafrost temperature and the measurement of the air humiture on the surface of the frost soil, the printed board of the second sensor module is set with a triaxial acceleration transducer for measuring the rail vibrating acceleration; when starting the sensor node to process monitor, the first sensor module, the second sensor module of the sensor module measure the frost soil parameter to transmit to the processing communication module through the energy supplying module, after being primarily treated by the processing communication modle, transmitting directly by the processing communication module or indirectly by the sensor node to the monitor center, for subsequent analysis and treatment. The invention provides a new resolving path for the rail way frost soil subgrade.
Description
Technical field
The invention belongs to frozen soil monitoring field, particularly be used for the sensor node and the method for work of railway frozen earth roadbed safety monitoring.
Background technology
At present, existing several railways have been built in the ever frost district in the world such as states such as Russia, the U.S., Canada.Frozen soil is a kind of special medium, frozen earth roadbedly all serious problem may occur at any time, and most of frozen soil railways in the world exist very high disease rate at present, shows that as the investigation to back Baikal railway in 1996 circuit disease rate reaches 40.5%.Therefore, how timely to railway frozen earth roadbed situation, reliable detection also is dealt into abnormal information fast and accurately Surveillance center and is just seeming extremely important on the train of high speed driving.
Railway frozen earth roadbed monitoring content comprises three aspects:
1. the meteorological element (temperature, air pressure, relative humidity, solar radiation etc.) that frozen soil living environment and roadbed diabatic process are had a direct impact;
2. frozen soil load key element (train by time pressure, vibration etc.);
3. frozen soil self parameter (temperature of frozen soil, deformation, thickness etc.).
In actual monitoring, often aspect three, respectively select one or two principal element to monitor the content, thereby under the not high situation of cost, also can more comprehensively reflect tested frozen earth roadbed safety case.
Frozen soil is a kind of special media responsive especially to temperature, and the various variations of frozen soil mostly have direct or indirect relation with temperature.Therefore, the temperature monitoring variable that is absolutely necessary.The method of frozen earth roadbed temperature monitoring is to put 36 temperature sensors at the dark 20 meters monitoring holes lining of monitoring section, comes the frozen soils temperature of sensing measured point to distribute.
The rate of heat exchange of the humiture of frozen earth roadbed surperficial air and frozen soil and surrounding space has much relations, usually also needs to monitor the humiture of the air on frozen earth roadbed surface.
The vibration strong or weak of rail has reflected the size of the suffered load of frozen soil, also monitors frozen earth roadbed vibration of going up rail usually.
Other key element also should add under the situation of needs.Just essential in the safety monitoring of the bridge of permafrost region etc. such as the monitoring of distortion.
At present, in the railway frozen earth roadbed monitoring of reality, the main monitoring system that is based on the wire transmission medium that adopts.Main monitoring variable is a temperature, and the temperature sensor of employing mainly is a thermistor, and transmission medium mainly is an optical fiber.This monitoring scheme adopts thermistor as temperature probe, and each thermistor all needs independently line and treatment circuit, and will arrange 36 temperature sensors in each monitoring holes, and this just makes very huge of whole data collection part.In addition, adopt optical fiber as transmission medium, communication is reliable, and data transmission rate is also high, but the required manpower and materials of laying optical fiber are all very big, and system maintenance is also relatively more difficult.
Document " based on the long-range ground temperature of LPC2114 processor and the design of settlement monitoring system " (Xu Fei, Lei Bin. " electronic devices and components application ", 2007,9 (2), pp.53-56,60.) in, at Qinghai-Tibet Railway residing special altitude environment along the line, long-range ground temperature and the settlement monitoring system that can gather the gentle settling data in ground and upload have automatically been proposed.System adopts the ARM7 microprocessor as the CPU processing unit, adopts thermistor as temperature sensor, and the field monitoring data of collection report Surveillance center by the GSM-R network remote based on GPRS.This scheme exists sensor wiring and Acquisition Circuit complicated problems equally, although adopt the GSM-R wireless mode to carry out the manpower and materials consumption that communication can avoid using wired mode such as optical fiber to bring, needs the cost of use of payment great number.
Summary of the invention
The objective of the invention is: overcome the deficiencies in the prior art part, a kind of sensor node and method of work that is used for railway frozen earth roadbed safety monitoring is provided.The sensor node that is used for railway frozen earth roadbed safety monitoring that the present invention is designed, sensor line and treatment circuit are simple, data transfer mode is advanced, the frozen soil parameter of monitoring is many and representative, for railway frozen earth roadbed safety monitoring provides a kind of new solution route.
Technology contents of the present invention is: a kind of sensor node that is used for railway frozen earth roadbed safety monitoring, and comprise interconnective sensor assembly, handle communication module and energy supply module, particularly:
Sensor assembly comprises the first sensor module and second sensor assembly, wherein, the first sensor module, second sensor assembly and processing communication module directly are electrically connected with the energy supply module, and transmit information by the energy supply module, be equipped with a plurality of digital temperature sensors of mutual electrical connection on the printed circuit board of first sensor module, a Temperature Humidity Sensor, first interface circuit and second interface circuit, tripod interface J1 and the one 20 pin interface JP1, a plurality of digital temperature sensors are connected in parallel on three heart yearns, be electrically connected with the energy supply module by the tripod interface J1 on the printed circuit board and first interface circuit, the distributed measurement that is used for frozen soils temperature, Temperature Humidity Sensor directly is welded on the printed circuit board, the temperature and humidity measurement that is used for frozen soil surface air, the first sensor module is electrically connected with the first interface H1 of energy supply module by the one 20 pin interface JP1, transmits information by the energy supply module to handling communication module;
The 3-axis acceleration sensor U1, modulate circuit and the 2 20 pin interface JP2 that comprise mutual electrical connection on the printed circuit board of second sensor assembly, 3-axis acceleration sensor is an aanalogvoltage output type 3-axis acceleration sensor, it is electrically connected with the second interface H2 of energy supply module by modulate circuit and the 2 20 pin interface JP2 on the described printed circuit board, is used for the measurement of rail vibration acceleration;
VDD pin and the VSS pin of 3-axis acceleration sensor U1 are respectively power pins and grounding pin, behind the cross-over connection filter capacitor C0, directly are connected with the 2 20 pin interface JP2 between them; G-select1 and g-select2 are U1 measurement range selection pin, and they directly are connected with the 2 20 pin interface JP2;
Select pin for the mode of operation of 3-axis acceleration sensor U1, it directly is connected with the 2 20 pin JP2 interface; XOUT, YOUT and ZOUT are respectively X, the Y of 3-axis acceleration sensor U1, the voltage output pin of Z direction, and they are respectively through being connected with the 2 20 pin interface JP2 by behind R1 and C1, R2 and No. three low-pass filters that C2, R3 and C3 form; The end of resistance R 1, R2, R3 is connected with XOUT, YOUT, the ZOUT of 3-axis acceleration sensor U1 respectively, and the other end is connected with C1, C2, C3 respectively; The other end of C1, C2, C3 then all is connected with the VSS of 3-axis acceleration sensor U1, and the 2 20 pin interface JP2 is connected with the second interface H2 of energy supply module, realizes being electrically connected between second sensor assembly and energy supply module;
Handle communication module and comprise embedded microprocessor, antenna, radio circuit, peripheral circuit and the 3 20 pin interface JP3, the 4 20 pin interface JP4 that is electrically connected mutually on the printed circuit board, wherein, the 3 20 pin interface JP3 and the 4 20 pin interface JP4 are the double interface of 20 pin, the 3 20 pin interface JP3 is connected with the P1 mouth with the I/O port P0 mouth of embedded microprocessor, and the 4 20 pin interface JP4 is connected with P2 mouth, programming pin, reset pin and the power pins of embedded microprocessor; The inside of embedded microprocessor is integrated with the 2.4GHz radio transmitting and receiving chip, its radio frequency pin is connected with antenna by radio circuit, be used for the wireless receiving and dispatching data, the 3 20 pin interface JP3 and the 4 20 pin interface JP4 are connected the 3rd interface H3 and the 4th interface H4 of energy supply module respectively, realize the electrical connection of this processing communication module and energy supply module, the operation of control whole sensor node, storage and handle the first sensor module and the data of the second sensor assembly collection and the data that other sensor node is sent, and with other sensor node with the wireless communication mode exchange message;
The energy supply module comprises the battery that is equipped with on the printed circuit board, the battery case and the first interface H1, the second interface H2, the 3rd interface H3, the 4th interface H4, stick in the battery case on the printed circuit board battery is housed, and be electrically connected with printed circuit board by lead, the first interface H1 and the second interface H2 respectively with the first sensor module, the one 20 pin interface JP1 of second sensor assembly and the 2 20 pin interface JP2 are electrically connected, the 3rd interface H3 and the 4th interface H4 are electrically connected with the 3 20 pin interface JP3 and the 4 20 pin interface JP4 that handle communication module respectively, each module is connected into a sensor node integral body, be used for the energy supply module, the first sensor module, mutual transmission information between second sensor assembly and processing communication module.
As further improvement to relevant art, a plurality of digital temperature sensors are 36, model is DS18B20, Temperature Humidity Sensor is that a model is SHT71,3-axis acceleration sensor U1 model is MMA7260QT, they all can be worked between-40 ℃～+ 80 ℃, and can be under the low temperature environment of frozen soil operate as normal;
Modulate circuit comprises three road RC low-pass filters and the A/D transducer of being made up of resistance R 1, R2, R3 and capacitor C 1, C2, C3, and the A/D transducer is for A/D transducer independently or be integrated in A/D transducer on the embedded microprocessor;
The model of embedded microprocessor is cc2430, comprises P0 mouth, P1 mouth, P2 mouth, programming pin, power pins, reset pin, is integrated with the radio transmitting and receiving chip cc2420 and the radio frequency pin that work in the international ISM band of 2.4GHZ;
The one 20 pin interface JP3 and the 2 20 pin interface JP4 can also be as the sensor node programmings.
The method of work that is used for the sensor node of railway frozen earth roadbed safety monitoring, particularly:
Initialization and self check enter sleep pattern;
When task, wake sensor node up, enter mode of operation, each module enters ready state;
Judge task type, change corresponding processing over to according to task type:
Task is to detect, and start sensor module image data after embedded microprocessor is handled, judges whether and need send data to Surveillance center, if need, then changes the transmission task over to, otherwise enters sleep pattern;
Task is to send, and then starts wireless transmitter and sends data, is sent completely the laggard sleep pattern of going into;
Task is to receive, and then starts wireless transmitter and receives data, finishes receiving the laggard sleep pattern of going into.With respect to prior art, the invention has the beneficial effects as follows:
One, the sensor node that the present invention is designed, comprise mutual electrical connection and communication first sensor module, second sensor assembly, handle communication module and energy supply module;
Installation needs according to vibration measuring in the actual installation and thermometric hygrometric sensor, temperature sensor DS18B20 is set in the first sensor module, adopt unibus digital temperature sensor DS18B20 in a monitoring holes, to arrange 36, these 36 DS18B20 are electrically connected with handling communication module by unique one three heart yearn and shared simple interface circuit, measure the temperature of measured point frozen soil.Not only sensor line and treatment circuit complexity reduce greatly, and used temperature sensor is digital quantity output, and antijamming capability is strong, is easy to handle;
Be equipped with 3-axis acceleration sensor in second sensor assembly,, make the monitoring result of this sensor contact can reflect the frozen soil state of measuring point more all sidedly in order to detect the oscillation intensity of rail;
The first sensor module and second sensor assembly, be connected with sensor node by special purpose interface and winding displacement, for the installation of sensor when the actual measurement brings convenience, the encapsulation technology that each module of designed sensor node has adopted outside passive isolated and inner initiatively temperature, humidity control to combine, thus the described sensor node that is used for the Frozen Earth Railway Roadbed safety monitoring can be used at complex environments such as permafrost region high humility, the big temperature difference, frequent snowstorm, ultralow temperature.
Its two, the embedded microprocessor cc2430 that processing communication module of the present invention uses is integrated with radio transmitting and receiving chip cc2420, only needs to add antenna and a small amount of radio-frequency (RF) component and can work in the free frequency range of the international ISM of 2.4GHz, reduces cost of development.Employing works in the wireless communication mode transmission information that the free frequency range of the international ISM of 2.4GHz conforms to the IEEE802.15.4 agreement, and the manpower and materials consumption that brings of promptly having avoided laying circuits such as optical fiber need not be paid the communication usage charges again.
Its three, the sensor node that is used for railway frozen earth roadbed safety monitoring of the present invention design has adopted following low-power consumption measure: 1. selected low-power consumption, components and parts that integrated level is high for use; 2. adopted the power supply mode of single supply, low-voltage; 3. sensor and treatment circuit have partly been adopted subregion, time sharing power supply technology, had only when module is worked and just power, idle module is not powered; 4. sensor node is in sleep pattern usually, only just enters mode of operation when task is arranged, and after task is finished, enters sleep pattern immediately; 5. communication module adopts high as far as possible baud rate, sends to receive all to adopt interrupt mode, and sign off enters low power consumpting state at once.
Description of drawings
Fig. 1 is the composition frame chart that is used for the sensor node of railway frozen earth roadbed safety monitoring.
Fig. 2 is the principle schematic of first sensor module that is used for the sensor node of railway frozen earth roadbed safety monitoring.
Fig. 3 is the principle schematic of second sensor assembly that is used for the sensor node of railway frozen earth roadbed safety monitoring.
Fig. 4 is the synoptic diagram of processing communication module that is used for the sensor node of railway frozen earth roadbed safety monitoring.
Fig. 5 is the synoptic diagram of energy supply module that is used for the sensor node of railway frozen earth roadbed safety monitoring.
Fig. 6 is the workflow diagram that is used for the sensor node of railway frozen earth roadbed safety monitoring.
Embodiment
Below in conjunction with accompanying drawing embodiments of the present invention are further described
Fig. 1 is the composition frame chart that is used for the sensor node of railway frozen earth roadbed safety monitoring.Designed sensor node, comprise first sensor module, second sensor assembly, handle communication module and energy supply module, first sensor module, second sensor assembly, processing communication module directly are electrically connected with the energy supply module, and first sensor module, second sensor assembly intercom with the processing communication module mutually by the energy supply module.
Fig. 2 is the principle schematic of first sensor module that is used for the sensor node of railway frozen earth roadbed safety monitoring.In Fig. 2, digital temperature sensor S1～S36 that 36 models are DS18B20 is connected in parallel on one three heart yearn, and J1 is connected with printed circuit board by the tripod interface, and first interface circuit on printed circuit board is connected with the one 20 pin interface JP1 again; Model is that the SHT71 Temperature Humidity Sensor directly is welded on the printed circuit board, is connected with the one 20 pin interface JP1 by second interface circuit; The one 20 pin interface JP1 is electrically connected the first interface H1 of energy supply module, and realization first sensor module is electrically connected with the energy supply module.
Fig. 3 is the principle schematic of second sensor assembly that is used for the sensor node of railway frozen earth roadbed safety monitoring.In Fig. 3, the model of 3-axis acceleration sensor U1 is MMA7260QT, and it is an aanalogvoltage output type 3-axis acceleration sensor.VDD pin and the VSS pin of 3-axis acceleration sensor U1 are respectively power pins and grounding pin, behind the cross-over connection filter capacitor C0, directly are connected with the 2 20 pin interface JP2 between them; G-select1 and g-select2 are 3-axis acceleration sensor U1 measurement range selection pin, and they directly are connected with the 2 20 pin interface JP2;
Select pin for the mode of operation of U1, it directly is connected with the 2 20 pin JP2 interface; XOUT, YOUT and ZOUT are respectively X, the Y of 3-axis acceleration sensor U1, the voltage output pin of Z direction, and they are respectively through being connected with the 2 20 pin interface JP2 by behind R1 and C1, R2 and No. three low-pass filters that C2, R3 and C3 form.The end of resistance R 1, R2, R3 is connected with XOUT, YOUT, the ZOUT of 3-axis acceleration sensor U1 respectively, and the other end is connected with C1, C2, C3 respectively; The other end of C1, C2, C3 then all is connected with the VSS of 3-axis acceleration sensor U1.The 20th pin interface JP2 is connected with the second interface H2 of energy supply module, realizes being electrically connected between second sensor assembly and energy module.
Fig. 4 is the principle schematic of second sensor assembly that is used for the sensor node of railway frozen earth roadbed safety monitoring.In Fig. 3, cc2430 is an embedded microprocessor, peripheral circuit be make that cc2430 can operate as normal primary element and interconnect the circuit of being formed; The 3 20 pin interface JP3 and the 4 20 pin interface JP4 are the double interface of 20 pin, the 3 20 pin interface JP3 is connected with P1 with the I/O port P0 of cc2430, and the 4 20 pin interface JP4 is connected with P2 mouth, power pins, reset pin and the programming pin of cc2430; The inside of cc2430 is integrated with 2.4GHz radio transmitting and receiving chip cc2420, and its radio frequency pin is connected with antenna by radio circuit, is used for the wireless receiving and dispatching data.The 3 20 pin interface JP3 and the 4 20 pin interface JP4 also receive the 3rd interface H3 and the 4th interface H4 of energy supply module respectively, realize the electrical connection of these two modules.
Fig. 5 is the synoptic diagram of energy supply module that is used for the sensor node of railway frozen earth roadbed safety monitoring.In Fig. 5, battery case is bonded on the printed circuit board, battery be contained in battery close interior and by lead with print the road plate and link to each other, be that sensor node is powered.Be welded among four interface H1, H2 on the printed circuit board, H3, the H4, interface H1 is connected with the interface JP1 of first sensor module, interface H2 is connected with the interface JP2 of second sensor assembly, and interface H3 links to each other with JP4 with the interface JP3 that handles communication module respectively with H4.Thereby each module is connected into a sensor node integral body.
Fig. 6 is the workflow diagram that is used for the sensor node of railway frozen earth roadbed safety monitoring.The flow process of its method of work is:
Sensor node powers on and begins back (step 100), each module initialization of sensor contact and self check (step 110), and then the sensor contact enters sleep pattern (step 120); Then, does the task that judged whether in step 130 want node to finish? if no, then continue to be in sleep state (returning step 120); If task is arranged, then sensor node enters mode of operation, and each module is in ready state (step 140), is the type of then judging task in step 150 to send? receive? still detect?
If task is to receive, then start radio receiving transmitting module and receive data, enter sleep state (step 170) then; If task is to send, then start radio receiving transmitting module and send data, enter sleep state (step 190) then; If task is to detect, start sensor module image data (step 160) then, and handle the data (step 180) collect by embedded microprocessor, and then in step 200, judge whether need to send data after the acquisition process, if need, then enter step 190, otherwise sensor node enters sleep pattern.
Obviously, those skilled in the art can carry out various changes and modification to the sensor node that is used for railway frozen earth roadbed safety monitoring of the present invention and method of work and not break away from design philosophy of the present invention and scope.So, if these are changed and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (6)
1, a kind of sensor node that is used for railway frozen earth roadbed safety monitoring comprises interconnective sensor assembly, handles communication module and energy supply module, it is characterized in that:
Described sensor assembly comprises the first sensor module and second sensor assembly, wherein, described first sensor module, second sensor assembly and described processing communication module directly are electrically connected with described energy supply module, and transmit information by described energy supply module, be equipped with a plurality of digital temperature sensors of mutual electrical connection on the printed circuit board of described first sensor module, a Temperature Humidity Sensor, first interface circuit and second interface circuit, tripod interface J1 and the one 20 pin interface JP1, described a plurality of digital temperature sensor is connected in parallel on three heart yearns, be electrically connected with described energy supply module by the tripod interface J1 on the printed circuit board and first interface circuit, the distributed measurement that is used for frozen soils temperature, a described Temperature Humidity Sensor directly is welded on the described printed circuit board, the temperature and humidity measurement that is used for frozen soil surface air, the first sensor module is electrically connected with the first interface H1 of described energy supply module by described the one 20 pin interface JP1, transmits information through the energy supply module to described processing communication module;
The 3-axis acceleration sensor, modulate circuit and the 2 20 pin interface JP2 that comprise mutual electrical connection on the printed circuit board of described second sensor assembly, described 3-axis acceleration sensor is an aanalogvoltage output type 3-axis acceleration sensor, it is electrically connected with the second interface H2 of described energy supply module by modulate circuit and the 2 20 pin interface JP2 on the described printed circuit board, is used for the measurement of rail vibration acceleration;
VDD pin and the VSS pin of described 3-axis acceleration sensor U1 are respectively power pins and grounding pin, behind the cross-over connection filter capacitor C0, directly are connected with the 2 20 pin interface JP2 between them; G-select1 and g-select2 are 3-axis acceleration sensor U1 measurement range selection pin, and they directly are connected with the 2 20 pin interface JP2;
Select pin for the mode of operation of 3-axis acceleration sensor U1, it directly is connected with the 2 20 pin JP2 interface; XOUT, YOUT and ZOUT are respectively X, the Y of 3-axis acceleration sensor U1, the voltage output pin of Z direction, and they are respectively through being connected with the 2 20 pin interface JP2 by behind R1 and C1, R2 and No. three low-pass filters that C2, R3 and C3 form; The end of resistance R 1, R2, R3 is connected with XOUT, YOUT, the ZOUT of 3-axis acceleration sensor U1 respectively, and the other end is connected with C1, C2, C3 respectively; The other end of C1, C2, C3 then all is connected with the VSS of 3-axis acceleration sensor U1, and the 2 20 pin interface JP2 is connected with the second interface H2 of energy supply module, realizes being electrically connected between second sensor assembly and energy supply module;
Described processing communication module comprises embedded microprocessor, antenna, radio circuit, peripheral circuit and the 3 20 pin interface JP3, the 4 20 pin interface JP4 that is electrically connected mutually on the printed circuit board, wherein, the 3 20 pin interface JP3 and the 4 20 pin JP4 are the double interface of 20 pin, the 3 20 pin interface JP3 is connected with the P1 mouth with the I/O port P0 mouth of embedded microprocessor, and the 4 20 pin interface JP4 is connected with P2 mouth, power pins, reset pin and the programming pin of embedded microprocessor; The inside of embedded microprocessor is integrated with the 2.4GHz radio transmitting and receiving chip, its radio frequency pin is connected with antenna by radio circuit, be used for the wireless receiving and dispatching data, the 3 20 pin interface JP3 and the 4 20 pin interface JP4 are connected the 3rd interface H3 and the 4th interface H4 of energy supply module respectively, realize the electrical connection of these two modules, the operation of control whole sensor node, storage and handle the first sensor module and the data of the second sensor assembly collection and the data that other sensor node is sent, and with other sensor node with the wireless communication mode exchange message;
Described energy supply module comprises the battery that is equipped with on the printed circuit board, the battery case and the first interface H1, the second interface H2, the 3rd interface H3, the 4th interface H4, stick in the battery case on the printed circuit board battery is housed, and be electrically connected with printed circuit board by lead, the described first interface H1 and the second interface H2 respectively with described first sensor module, the one 20 pin interface JP1 of second sensor assembly and the 2 20 pin interface JP2 are electrically connected, described the 3rd interface H3 and the 4th interface H4 are electrically connected with the 3 20 pin interface JP3 and the 4 20 pin interface JP4 of described processing communication module respectively, each module is connected into a sensor node integral body, be used for described energy supply module, the first sensor module, mutual transmission information between second sensor assembly and processing communication module.
2, the sensor node that is used for railway frozen earth roadbed safety monitoring according to claim 1, it is characterized in that: described a plurality of digital temperature sensors are 36, model is DS18B20, described Temperature Humidity Sensor model is SHT71, described 3-axis acceleration sensor model is MMA7260QT, they all can be worked between-40 ℃～+ 80 ℃, and can be under the low temperature environment of frozen soil operate as normal.
3, the sensor node that is used for railway frozen earth roadbed safety monitoring according to claim 1, it is characterized in that: described modulate circuit comprises three road RC low-pass filters and the A/D transducer of being made up of resistance R 1, R2, R3 and capacitor C 1, C2, C3, and described A/D transducer is for A/D transducer independently or be integrated in A/D transducer on the described embedded microprocessor.
4, the sensor node that is used for railway frozen earth roadbed safety monitoring according to claim 1, it is characterized in that: the model of described embedded microprocessor is cc2430, is integrated with the radio transmitting and receiving chip cc2420 and the radio frequency pin that work in the international ISM band of 2.4GHZ.
5, the sensor node that is used for railway frozen earth roadbed safety monitoring according to claim 1 is characterized in that: described the one 20 pin interface JP3 and the 2 20 pin interface JP4, and can also be as the sensor node programming.
6, a kind of method of work that is used for the sensor node of railway frozen earth roadbed safety monitoring is characterized in that:
Initialization and self check enter sleep pattern;
When task, wake sensor node up, enter mode of operation, each module enters ready state;
Judge task type, change corresponding processing over to according to task type:
Task is to detect, and start sensor module image data after embedded microprocessor is handled, judges whether and need send data to Surveillance center, if need, then changes the transmission task over to, otherwise enters sleep pattern;
Task is to send, and then starts wireless transmitter and sends data, is sent completely the laggard sleep pattern of going into;
Task is to receive, and then starts wireless transmitter and receives data, finishes receiving the laggard sleep pattern of going into.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102338634A (en) * | 2010-07-23 | 2012-02-01 | 鸿富锦精密工业（深圳）有限公司 | Mobile electronic device having vibration compensation function and vibration compensation method thereof |
| CN102607498A (en) * | 2012-03-02 | 2012-07-25 | 河南省气象科学研究所 | Frozen soil and dry soil layer measuring transducer |
| CN102852129A (en) * | 2012-09-17 | 2013-01-02 | 中交第一公路勘察设计研究院有限公司 | Automatic long-term monitoring system and monitoring method for severe roadbed deformation |
| CN104614011A (en) * | 2013-11-05 | 2015-05-13 | 中国科学院寒区旱区环境与工程研究所 | Frozen soil test data acquiring and processing system |
| CN111254904A (en) * | 2020-01-30 | 2020-06-09 | 华东交通大学 | Railway permafrost region roadbed deformation detection and prediction system |
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| AU6094301A (en) * | 2000-05-25 | 2001-12-03 | Daimlerchrysler Rail Systems Gmbh | Monitoring system for railway vehicles |
| CN2814543Y (en) * | 2005-01-25 | 2006-09-06 | 上海地铁运营科技发展有限公司 | Automatic measuring system for rail temperature displacement |
| CN1645430A (en) * | 2005-01-25 | 2005-07-27 | 上海地铁运营科技发展有限公司 | Track temperature displacement detecting system |
| CN1873713A (en) * | 2006-05-19 | 2006-12-06 | 天津市农业科学院信息研究所 | Remote control type collector for data of temperature and humidity of soil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102338634A (en) * | 2010-07-23 | 2012-02-01 | 鸿富锦精密工业（深圳）有限公司 | Mobile electronic device having vibration compensation function and vibration compensation method thereof |
| CN102607498A (en) * | 2012-03-02 | 2012-07-25 | 河南省气象科学研究所 | Frozen soil and dry soil layer measuring transducer |
| CN102852129A (en) * | 2012-09-17 | 2013-01-02 | 中交第一公路勘察设计研究院有限公司 | Automatic long-term monitoring system and monitoring method for severe roadbed deformation |
| CN104614011A (en) * | 2013-11-05 | 2015-05-13 | 中国科学院寒区旱区环境与工程研究所 | Frozen soil test data acquiring and processing system |
| CN111254904A (en) * | 2020-01-30 | 2020-06-09 | 华东交通大学 | Railway permafrost region roadbed deformation detection and prediction system |
| CN111254904B (en) * | 2020-01-30 | 2021-05-18 | 华东交通大学 | Railway permafrost region roadbed deformation detection and prediction system |
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