CN1949290A - Method and system for testing working state of heat rod - Google Patents
Method and system for testing working state of heat rod Download PDFInfo
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- CN1949290A CN1949290A CN 200610144928 CN200610144928A CN1949290A CN 1949290 A CN1949290 A CN 1949290A CN 200610144928 CN200610144928 CN 200610144928 CN 200610144928 A CN200610144928 A CN 200610144928A CN 1949290 A CN1949290 A CN 1949290A
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Abstract
The invention relates to a hot pin state detecting method and the system. It samples the temperature of different height on the hot pin cooling plate. The temperature signal would be transformed to digital signal to restore, which would be transmitted to state determine unit. The determine unit would take restore, process and analysis to the digital signal. The method and system is suitable for detecting the working state of hot pin, and decreases the labor intensity of detecting worker and improves efficiency.
Description
Technical field
The present invention relates to test technique automatic, particularly a kind of frozen earth roadbed working state of heat rod detection method and system.
Background technology
Continuous enhancing along with fast development of national economy and national economic strength, and the building up and be open to traffic smoothly of Qinghai-Tibet Highway and Qinghai-Tibet Railway, China has accumulated certain experience in the road and rail construction construction of Permafrost Area, in ten years from now on, many provinces and regions highway constructions such as Qinghai, Tibet, Xinjiang, Heilungkiang will be fast-developing, wherein, numerous items all passes through the ever frost district.
But, because road network can inevitably have a negative impact to the original ecology of permafrost region, unstable depression, wave, longitudinal cracking will appear in roadbed in the road process, diseases such as side slope slump, thus cause the diseases such as lobe, transverse fissure, check crack of bituminous pavement to take place.
The hot pin technology is as a kind of effectively temperature adjusting technology on one's own initiative, and it normally imbeds the hot pin lower end below the face of land 8 meters, on its exposed face of land of 4 meters overcoat heating radiators in upper end.Fig. 1 buries synoptic diagram underground for on-the-spot hot pin.Xian Chang hot pin mainly is divided into three parts as can be seen: radiating segment 101 adheres to heat radiator 104 above on the face of land; Adiabatic section 102 and endotherm section 103 are all below the face of land.
In the process of utilizing the hot pin technology, when the temperature of underground soil layer goes up environment above Ground, the liquid refrigerant of hot pin inside is just vaporized, gaseous working medium carries underground heat and rises to the hot pin upper end along hot pin pipe inboard, at this moment because the environment temperature more than the face of land is lower, the working medium of vaporization is released to the atmosphere by the heat radiator outside the hot pin from underground entrained heat and goes, and working medium changes liquid state once more into and drops to the hot pin bottom.So move in circles and make underground temperature remain at below 0 ℃.When the temperature of underground soil layer was lower than the ground environment temperature, hot pin quit work, and that is to say that above process is irreversible.This shows, in the seasonal refrigeration processes of the environment temperature more than the face of land, utilize hot pin from ground, to make the frozen soil layer cooling and to store cold by draw heat, prevent that ever frost from melting.Can eliminate the roadbed freeze injury with this, promote the ever frost upper limit effectively, protect frozen earth roadbed stability.
Yet when utilizing the frozen earth roadbed stability of hot pin technical protection, in a single day hot pin imbeds the roadbed both sides, and it just can be year in year out along with the variation of environment temperature is regulated underground temperature.The working environment of hot pin but is very abominable, can reach-30 ℃～-40 ℃ during low temperature, and day and night temperature is very big; Rain, snow, frost, freeze, intensive ultraviolet or the like, all can exist and exert an influence; Under this bad working environment, As time goes on the duty of hot pin, work efficiency all can change, some in addition can produce inefficacy.Just need carry out regular detection and maintenance to this, grasp the firsthand information of working state of heat rod at any time the duty of hot pin.
The domestic and international at present detection method about working state of heat rod mainly contains: starting performance and isothermal performance detection method, contactless pulse laser excitation ultrasound ripple detection method, heat pipe sealing detect and the heat transfer performance detection method.But these detection methods all are the detection methods when being suitable for hot pin and dispatching from the factory, and the scene that is difficult to be applied to working state of heat rod is detected.
In addition, also there is a kind of detection method: the infrared imaging method of testing.The different ultimate principle of heat radiation that it mainly utilizes object to be produced when different temperatures is noted the temperature that also can demonstrate the chromatogram of different temperatures and write down difference with the duty of hot pin with imaging technique.Though this detection method can realize on-the-spot the detection, because the storage data are limited, generally can only write down low volume data, also be unwell to on-the-spot the detection.
This shows that present working state of heat rod detection method also is unwell to and frozen earth roadbed working state of heat rod is carried out the scene detects.
Summary of the invention
In view of this, first purpose of the present invention is to provide a kind of working state of heat rod detection system, and this system is suitable for that frozen earth roadbed working state of heat rod is carried out the scene and detects.
Second purpose of the present invention is to provide a kind of working state of heat rod detection method, and this method is suitable for that frozen earth roadbed working state of heat rod is carried out the scene and detects.
In order to realize above-mentioned first purpose, the invention provides, a kind of working state of heat rod detection system, this system is made up of hot pin data acquisition unit and working state of heat rod determining unit;
The hot pin data acquisition unit, the temperature signal of collection hot pin is converted to digital signal with the temperature signal that collects, and sends this digital signal to the working state of heat rod determining unit then;
The working state of heat rod determining unit is determined working state of heat rod according to the digital signal that receives.
Wherein, described hot pin data acquisition unit and working state of heat rod determining unit are arranged in two separate equipment, perhaps are integrated in the equipment.
Described hot pin data acquisition unit comprises:
Data acquisition module: after gathering the temperature signal of hot pin, temperature signal is converted to digital signal, and output;
Data memory module: the digital signal of data acquisition module output is stored;
Data transmission module: the digital data transmission that will be stored in the data memory module arrives the working state of heat rod determining unit.
Wherein, described data acquisition module comprises:
Temperature sensor: after gathering the temperature signal of hot pin, temperature signal is converted to electric signal sends signal conditioning circuit to;
Signal conditioning circuit: send A/D convertor circuit to after electric signal nursed one's health;
A/D convertor circuit: receive the electric signal after the conditioning, and the electrical signal conversion after will nurse one's health is digital signal, and exports.
More preferably, described hot pin data acquisition unit further comprises controller;
Controller, the control data acquisition module is gathered the temperature signal of hot pin and temperature signal is converted to digital signal, the control data memory module is stored digital signal, and the control data transmission module is given the working state of heat rod determining unit with digital data transmission.
More preferably, described hot pin data acquisition unit further comprises man-machine interactive system;
Man-machine interactive system, the instruction that operating personnel are assigned sends to described controller, and the temperature signal that receives is offered operating personnel;
Controller, receive finish after the instruction control and treatment and with data collecting module collected to temperature signal feed back to man-machine interactive system.
Preferably, described controller, data memory module and man-machine interactive system are integrated in the equipment.
In this system, described working state of heat rod determining unit comprises:
Data communication module: be used to receive the digital signal that the hot pin data acquisition unit transmits, and send digital signal to data processing module;
Data processing module: be used for that the digital signal that receives is carried out linear fit and handle, and send result to data analysis module;
Data analysis module: will analyze through the data processing module data processed, and determine the duty of hot pin.
More preferably, described working state of heat rod determining unit further comprises database;
Described database is used to store the digital signal that data communication module receives, and/or the data processing module data processed, and/or the result after the data analysis module analysis.
In order to realize above-mentioned second purpose, the invention provides a kind of working state of heat rod detection method, this method may further comprise the steps:
1) temperature signal of hot pin is gathered;
2) convert the temperature signal that collects to digital signal;
3) digital signal is carried out analyzing and processing, determine working state of heat rod.
Temperature signal on the described hot pin heat radiator is the temperature signal of differing heights on the hot pin heat radiator.
Step 3) comprises: described digital signal is carried out linear fit handle, intercept and slope after handling according to linear fit are determined working state of heat rod.
Described definite working state of heat rod is: the intercept of the hot pin of the operate as normal under resulting intercept and the equivalent environment temperature is compared, if resulting intercept, determines then that this hot pin work is undesired less than the intercept of the hot pin of operate as normal; If resulting intercept is not less than the intercept of the hot pin of operate as normal, determine that then this hot pin is working properly.
Further comprised before the intercept of described hot pin with the operate as normal under resulting intercept and the equivalent environment temperature compares: the slope of linear fit being handled the hot pin of the operate as normal under resulting slope and the equivalent environment temperature compares, if the absolute value of both differences does not exceed desirable scope, then proceed the step that the intercept with the hot pin of the intercept of this hot pin and the operate as normal under the equivalent environment temperature compares; If the absolute value of both differences exceeds desirable scope, then return step 1).
Comprise before the linear fit processing described digital signal is carried out: the integrality of judging digital signal; If digital signal is complete, then carry out the linear fit of digital signal is handled.
If judge that digital signal is imperfect, then abandon this digital signal, return step 1).
After judging that digital signal is imperfect, utilize the method for linear difference that digital signal is carried out completion, carry out then the linear fit of digital signal is handled.
As can be seen from the above technical solutions, working state of heat rod detection method provided by the present invention and system are based on hot pin and use on-the-spotly, are suitable for detecting in the hot pin environment for use duty of hot pin.Further, this method can not only be used for the hot pin applying unit, also can be used for simultaneously the detection of dispatching from the factory of hot pin manufacturer.More preferably, utilize the hot pin data acquisition unit that the hot pin temperature is gathered among the present invention, can once gather multi-group data, make and under rugged environment, carry out extensive hot pin data acquisition and become possibility, and reduced hot pin testing staff's labour intensity, improved efficient.
Description of drawings
Fig. 1 buries synoptic diagram underground for on-the-spot hot pin;
Fig. 2 is a working state of heat rod detection system structural drawing;
Fig. 3 is the structural drawing of hot pin data acquisition unit;
Fig. 4 is a working state of heat rod determining unit structural drawing;
Fig. 5 is the working state of heat rod detection system first embodiment synoptic diagram;
Fig. 6 is the second embodiment synoptic diagram of working state of heat rod detection system;
Fig. 7 is a working state of heat rod detection method process flow diagram;
Fig. 8 is the working state of heat rod detection method first embodiment synoptic diagram;
Fig. 9 is the working state of heat rod detection method second embodiment synoptic diagram.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawings and the specific embodiments the present invention is described in further detail.
For the ease of more being expressly understood the present invention, at first measuring object of the present invention is done simple declaration.For the hot pin that is embedded in frozen earth roadbed scene, unique what be easy to measure is data on the hot pin radiating segment.The present invention selects to reflect directly that the temperature of working state of heat rod is a measuring object.Adhere to heat radiator on the radiating segment of hot pin, the temperature on the heat radiator of on-the-spot hot pin is caused by multiple factor, mainly contains following factor:
1) environment temperature;
2) temperature of solar radiation hot pin heat radiator generation;
3) temperature that thermal source produces around the reflection of hot pin heat radiator;
4) hot pin when work, the temperature of bringing up from frozen soil layer that heat produced.
In above-mentioned 4 factors, factor 1) be leading at any time, no matter daytime or night, no matter whether hot pin work, also regardless of on-the-spot weather, environment temperature all can greatly influence the temperature on the heat radiator, so measured temperature has all reflected environment temperature at that time to a great extent on the hot pin heat radiator.Because the existence of temperature difference on the near surface SEQUENCING VERTICAL direction, there is tangible gradient in the temperature on the on-the-spot measured hot pin heat radiator, and promptly the temperature of heat radiator bottom is higher, and the temperature on heat radiator top is lower.But the working medium of hot pin inside can exert an influence to the gradient of temperature on the heat radiator.Factor 2) and 3) also influential to heat radiator, on fine daytime in the sky, because the irradiation of sunlight, the temperature of hot pin heat radiator can rise to some extent, and if there is thermal source in measure field, also can the temperature on the heat-radiating rod heat radiator be exerted an influence.For factor 4), if hot pin is under working condition, its internal working medium can ceaselessly pass to radiating segment to the heat of underground endotherm section, so just raised the temperature on the heat radiator, and raising of this temperature is present in whole section radiating segment, that is to say that the underground heat that comes of catching can not make the bottom heatsink temperature promote manyly and the top heatsink temperature promotes fewly, but the temperature of whole section heat radiator is all raised.Hot pin inside equates in the temperature of any high air working medium theoretically, but because the existence of the ambient atmosphere temperature difference, still there is the temperature difference in temperature on the measured hot pin heat radiator, but, however, under certain test condition, work hot pin endotherm section is caught the heat that comes and still can be showed in the temperature on heat radiator.
As seen through the above analysis: at first, working state of heat rod can reflect from the temperature on the hot pin heat radiator, when working state of heat rod is good, and the temperature increase on the heat radiator higher; Relatively poor or when not working fully when working state of heat rod, the temperature increase on the heat radiator less or do not promote fully.Secondly, the measurement of hot pin heatsink temperature should reduce factor 2 as far as possible) and 3) influence, otherwise serious interference can not get real analysis result.Frozen earth roadbed working state of heat rod detection method provided by the present invention and system are based on above conclusion, so, the hot pin data acquisition to as if the hot pin heat radiator on the temperature of differing heights; Working state of heat rod is to be drawn by near the height of relatively hot pin heatsink temperature and the size of thermograde.
Below the present invention is done detailed introduction, at first working state of heat rod detection system provided by the present invention is done detailed description.Its structure as shown in Figure 2, Fig. 2 is a working state of heat rod detection system structural drawing.This system is made up of two parts: hot pin data acquisition unit 201 and working state of heat rod determining unit 202.
Wherein, hot pin data acquisition unit 201 is used to gather the temperature signal of hot pin, and the temperature signal that collects is converted to digital signal, after digital signal is stored, sends working state of heat rod determining unit 202 to.
Working state of heat rod determining unit 202 after the digital signal of reception from the hot pin data acquisition unit, is carried out linear fit to it and is handled and analyze the duty of determining hot pin.
More preferably, hot pin data acquisition unit 201, the temperature signal of differing heights on the temperature signal, particularly hot pin heat radiator on the collection hot pin heat radiator.
Wherein, described hot pin data acquisition unit 201 and working state of heat rod determining unit 202 can lay respectively in two separate equipment, also can be integrated in the same equipment.
Respectively these two parts are done detailed description below, Fig. 3 is the structural drawing of hot pin data acquisition unit.As can be seen from Figure, hot pin data acquisition unit 201 mainly consists of the following components:
Data acquisition module 301: finish collection, and after the temperature signal that collects is converted to digital signal, send data transmission unit 303 to, perhaps send data memory module 302 to the hot pin temperature data.
Data memory module 302: the digital signal of data acquisition module 301 outputs is stored.
Data transmission module 303: receive the digital signal that data acquisition module 301 sends, perhaps read the digital signal that is stored in the data memory module 302 after, with digital data transmission to working state of heat rod determining unit 202.
Preferably, hot pin data acquisition unit 201 may further include human-computer interaction module, and operating personnel can observe and operate when image data by human-computer interaction module.
Preferably, hot pin data acquisition unit 201 may further include controller, receive the instruction of operating personnel by the human-computer interaction module input, the digital signal of data acquisition module output is write data memory module, and from data memory module, read digital signal and send the working state of heat rod determining unit to by data transmission module.
Preferably, the hot pin data acquisition unit 201 hot pin data collecting instrument that can be of portable form.
Fig. 4 is a working state of heat rod determining unit structural drawing, and working state of heat rod determining unit 202 is based on the computer application software systems.As can be seen from Figure, working state of heat rod determining unit 202 mainly consists of the following components:
Data communication module 401: be used for communicating by letter with hot pin data acquisition unit 201, receive the digital signal that hot pin data acquisition unit 201 transmits after, be transferred to data processing module 402.
Data processing module 402: receive the digital signal that data communication module 401 transmits, it is carried out after linear fit handles, the data after linear fit is handled send to data analysis module 403.
Above describedly digital signal is carried out process that linear fit handles give one example at this and describe: in the memory module of hot pin data acquisition unit, article one, record only writes down the temperature of a height, if a hot pin is surveyed the temperature of 10 height, ten are write down the partial data that could represent a hot pin so, data processing module 402 is found out ten records of this root hot pin after uploading, carry out linear fit and calculate the slope intercept according to these ten records.
In addition, in upload procedure, data processing module 402 will carry out the judgement of digital signal integrality, if digital signal is complete, then carries out above-mentioned linear fit treatment step; If digital signal is imperfect, when the data disappearance promptly occurring, data processing module 402 is abandoned this group digital signal, again temperature signal is gathered, perhaps data are carried out proceeding above-mentioned linear fit processing and subsequent process thereof again after the completion, make system have the function of self check, maintenance and correction with the method for linear difference.
Data analysis module 403: the duty that is used for the data analysis hot pin that sends according to data processing module 402.
The process of above-mentioned analysis working state of heat rod is: the intercept of the matched curve of the hot pin of operate as normal under resulting intercept and the equivalent environment temperature is compared, if resulting intercept, determines then that this hot pin work is undesired less than the intercept of the matched curve of the hot pin of operate as normal; If resulting intercept is not less than the intercept of matched curve of the hot pin of operate as normal, determine that then this hot pin is working properly.
More preferably, before the intercept of the matched curve of the hot pin of operate as normal compares under with resulting intercept and equivalent environment temperature, may further include: will compare according to the slope that linear fit is handled the matched curve of the hot pin of operate as normal under resulting slope and the equivalent environment temperature, if the absolute value of both differences exceeds desirable scope, institute's image data is invalid, carries out the collection of hot pin temperature data again; If the absolute value of both differences does not exceed desirable scope, then proceed the step that the intercept with the matched curve of the hot pin of operate as normal under resulting intercept and the equivalent environment temperature compares.
Because hot pin when operate as normal, can pass to the heat of its endotherm section radiating segment and distribute, so the hot pin that damages can't effectively be delivered to radiating segment with the heat of its endotherm section, so the temperature of this hot pin radiating segment just is less than other hot pins.After the temperature data on the hot pin heat radiator that will collect carried out curve fitting, rate of curve characterized the steady state (SS) of hot pin work.The intercept and the slope of the matched curve of operate as normal hot pin under different temperatures can be deposited in the database 404 in advance, the hot pin slope of operate as normal compares under slope that will obtain through data processing module 402 linear fits and the equivalent environment temperature, if both differences exceed desirable scope, illustrate that external interference is serious, institute's image data is invalid.If difference does not exceed desirable scope, the hot pin intercept that then continues operate as normal under the intercept that will obtain through data processing module 402 linear fits and the equivalent environment temperature compares, if intercept less than the hot pin intercept of operate as normal, illustrates that then hot pin work is undesired.
Described desirable scope can be set at 0.2, and this value is the empirical value in experiment and research work.
Preferably, this working state of heat rod determining unit can also comprise:
Database 404: be used to store the data that data communication module 401 receives, and preserve the data after data processing module 402 is handled, and the analysis result of data analysis module 403.
More preferably, this working state of heat rod determining unit can be convenient to raw data and result are carried out long preservation, and this is just for to have done good guarantee to the multianalysis and the long-run analysis of working state of heat rod.
Come working state of heat rod detection system provided by the present invention is done detailed description below by two embodiment.Fig. 5 is the working state of heat rod detection system first embodiment synoptic diagram.
Forward path 510, storer 502 and communication module 503 have been formed the hot pin data acquisition unit 201 among Fig. 2.
After the temperature of differing heights, temperature signal is converted to electric signal on the temperature sensor 511 collection site hot pin heat radiator, electric signal is delivered to A/D convertor circuit 513 and is realized the digital signal conversion behind the shaping filter of signal conditioning circuit 512.
Storer 502 is used to store the digital signal of exporting after forward path 510 image data corresponding to the data memory module among Fig. 3 302.
Storer 502 can be made up of special storage chip, also can be made up of small-sized movable storage device, also can directly utilize the storage space of controller.
Communication module 503 is used for the digital signal that the forward path 510 of storer 502 storages is exported is uploaded to host computer corresponding to the data transmission module among Fig. 3, carries out assay by the working state of heat rod determining unit in the host computer.
The hardware device that described communication module 503 needs can be buses such as RS-232, also can be that card reader can be connected the storer of storage card form with host computer.Its transmission can be finished by various data transfer protocols, for example RS-232, RS-485, CAN etc.
Working state of heat rod determining unit 202 in host computer 504 corresponding diagram 2.After host computer 504 receives the digital signal that transmits from communication module 503, after data communication module in the working state of heat rod determining unit obtains digital signal, data processing module carries out linear fit to data to be handled, finish the integrality of judgement image data and the match of data, and finish the importing and the preservation of database data, data analysis module is analyzed the duty of hot pin then, by intercept behind the linear fit and slope, analyzes and determines working state of heat rod.
Preferably, the hot pin data acquisition unit can further comprise human-computer interaction module 520.When image data, operating personnel can observe and operate by keyboard in the human-computer interaction module 520 521 and display 522.
Preferably, the hot pin data acquisition unit can also further comprise controller 501.Controller 501 receives the instruction of operating personnel by keyboard 521 inputs, digital signal write store 502 with forward path 510 conversion outputs, and from storer 502, read digital signal and send host computer 504 to by communication module 503, simultaneously the result is sent to display 522 and show.
Controller 501 can be single-chip microcomputer, DSP or other controllers.
Fig. 6 is the second embodiment synoptic diagram of working state of heat rod detection system.System shown in this embodiment mainly is made up of temperature acquisition probe 610 and notebook computer 620.
Operating personnel are by notebook computer 620 operations, control temperature sensor 611 carries out temperature acquisition, then temperature signal is converted to electric signal, electric signal is delivered to A/D convertor circuit 613 and is realized the digital signal conversion behind the shaping filter of signal conditioning circuit 612, to change good digital signal by communication module 614 and upload to notebook computer 620, directly the form with database is stored in the notebook computer 620.When analyzing data, the working state of heat rod determining unit can be set in notebook computer 620, directly, also database copy can be carried out in other computers in notebook computer 620 enterprising line number word Signal Processing and analyses.
Below working state of heat rod detection method provided by the invention is done description.This method key step as shown in Figure 7, Fig. 7 is a working state of heat rod detection method process flow diagram.Mainly comprise following step:
Step 701: the working state of heat rod detection system is gathered the temperature of differing heights on the hot pin heat radiator;
Step 702 working state of heat rod detection system converts the temperature signal that collects to digital signal;
Step 703: the working state of heat rod detection system is carried out the linear fit processing to digital signal, handles the duty that resulting intercept is determined hot pin according to linear fit.
The process of above-mentioned definite working state of heat rod is: the intercept of the matched curve of the hot pin of operate as normal under resulting intercept and the equivalent environment temperature is compared, if resulting intercept, determines then that this hot pin work is undesired less than the intercept of the matched curve of the hot pin of operate as normal; If resulting intercept is not less than the intercept of matched curve of the hot pin of operate as normal, determine that then this hot pin is working properly.
More preferably, before the intercept of the matched curve of the hot pin of operate as normal compares under with resulting intercept and equivalent environment temperature, may further include: will compare according to the slope that linear fit is handled the matched curve of the hot pin of operate as normal under resulting slope and the equivalent environment temperature, if the absolute value of both differences exceeds desirable scope, institute's image data is invalid, carries out the collection of hot pin temperature data again; If the absolute value of both differences does not exceed desirable scope, then proceed the step that the intercept with the matched curve of the hot pin of operate as normal under resulting intercept and the equivalent environment temperature compares.
Because hot pin when operate as normal, can pass to the heat of its endotherm section radiating segment and distribute, so the hot pin that damages can't effectively be delivered to radiating segment with the heat of its endotherm section, so the temperature of this hot pin radiating segment just is less than other hot pins.After the temperature data on the hot pin heat radiator that will collect carried out curve fitting, rate of curve characterized the steady state (SS) of hot pin work.The intercept and the slope of the matched curve of operate as normal hot pin under different temperatures can be deposited in the database 404 in advance, the hot pin slope of operate as normal compares under slope that will obtain through data processing module 402 linear fits and the equivalent environment temperature, if both differences exceed desirable scope, illustrate that external interference is serious, institute's image data is invalid.If difference does not exceed desirable scope, the hot pin intercept that then continues operate as normal under the intercept that will obtain through data processing module 402 linear fits and the equivalent environment temperature compares, if intercept less than the hot pin intercept of operate as normal, illustrates that then hot pin work is undesired.
Described desirable scope can be set at 0.2, and this value is the empirical value in experiment and research work.
More preferably, further comprise before handling digital signal being carried out linear fit: the integrality of judging digital signal; If digital signal is complete, then carry out the linear fit of digital signal is handled; If judge that digital signal is imperfect, then abandon this digital signal, return execution in step 701; Perhaps, if after judging that digital signal is imperfect, utilize the method for linear difference that digital signal is carried out completion, carry out then the linear fit of digital signal is handled and subsequent process.
Preferably, in step 702, convert the temperature signal that collects to digital signal after, digital signal is stored so that after finishing collection in worksite, the digital signal band is carried out determining of working state of heat rod from the hot pin working site.
In step 703, the working state of heat rod detection system is carried out the linear fit processing to digital signal, after result is stored, result is analyzed, and analysis result is also stored.
More than be exactly the key step of working state of heat rod detection method, on the basis of first embodiment of working state of heat rod detection system, its detection method enumerated embodiment describe in detail below.Fig. 8 is the working state of heat rod detection method first embodiment synoptic diagram.As can be seen from Figure, this method may further comprise the steps:
Step 801: the temperature sensor of forward path changes temperature signal into electric signal to after the differing heights temperature is gathered on the hot pin heat radiator.
Step 802: signal conditioning circuit carries out delivering to A/D convertor circuit behind the signal condition to electric signal.
Wherein, described signal is nursed one's health can be that electric signal is carried out shaping filter.
Step 803:AD change-over circuit is a digital signal with electrical signal conversion.
Step 804: the digital signal of forward path output deposits storer in.
Preferably, simultaneously write store also comprise data such as hot pin numbering and measuring height.
Step 805: the digital signal in the storer is uploaded to working state of heat rod determining unit in the host computer by communication module.
Can the data upload in the storer be arrived host computer by bus at this, also can make mobile memory directly be connected to host computer and realize data upload by card reader;
Step 806: the data communication module in the host computer receives the digital signal that the hot pin data acquisition unit transmits.
Step 807: the data processing module in the host computer is handled digital signal is carried out the linear fit processing.
Step 808: data analysis module is handled resulting intercept according to the data processing module linear fit, determines the duty of hot pin.
Wherein, the process of analyzing working state of heat rod is: the intercept of the matched curve of the hot pin of operate as normal under resulting intercept and the equivalent environment temperature is compared, if resulting intercept, determines then that this hot pin work is undesired less than the intercept of the matched curve of the hot pin of operate as normal; If resulting intercept is not less than the intercept of matched curve of the hot pin of operate as normal, determine that then this hot pin is working properly.
More preferably, before the intercept of the matched curve of the hot pin of operate as normal compares under with resulting intercept and equivalent environment temperature, may further include: will compare according to the slope that linear fit is handled the matched curve of the hot pin of operate as normal under resulting slope and the equivalent environment temperature, if the absolute value of both differences exceeds desirable scope, institute's image data is invalid, carries out the collection of hot pin temperature data again; If the absolute value of both differences does not exceed desirable scope, then proceed the step that the intercept with the matched curve of the hot pin of operate as normal under resulting intercept and the equivalent environment temperature compares.
Preferably, in the described step 806, the data communication module in the host computer can further be kept at digital signal in the database of host computer after receiving the digital signal of hot pin data acquisition unit transmission.
In the described step 807, result can be kept at after the data processing module processing digital signal in the host computer in the database in the host computer.
In the described step 808, after the duty of the intact hot pin of data analysis module analysis, analysis result can be kept in the database in the host computer.
On the basis of second embodiment of working state of heat rod detection system, its detection method is described in detail for an embodiment more below.Fig. 9 is the working state of heat rod detection method second embodiment synoptic diagram.As can be seen from Figure, this method may further comprise the steps:
Step 901: after the temperature sensor in the temperature acquisition probe is gathered the hot pin temperature, change temperature signal into electric signal.
Step 902: signal conditioning circuit carries out delivering to A/D convertor circuit behind the signal condition to electric signal.
It is wherein said that electric signal is carried out signal condition is that electric signal is carried out shaping filter.
Step 903:AD change-over circuit is a digital signal with electrical signal conversion.
Step 904: communication module directly passes in the notebook computer form storage with database with digital signal.
Equally also comprise data such as hot pin numbering and measuring height what this uploaded to database.
Step 905: the hot pin aggregation of data evaluation system in the notebook computer carries out linear fit to digital signal to be handled and analyzes, and determines working state of heat rod.
Be specially: data processing module carries out linear fit to digital signal to be handled, and finishes the integrality of judgement image data and the linear fit of data; The result that data analysis module is handled according to data processing module, the i.e. duty of analyzing hot pin by the intercept and the slope of straight line behind the linear fit.
Preferably, the result of the result that handles of data processing module and data analysis module analysis can deposit database in and preserves.
In addition, in step 905, also database copy can be provided with processing and the analysis of carrying out data in the computer of working state of heat rod determining unit to other, the step of handling and analyzing is with identical described in the step 905.
Therefore, system and method provided by the present invention, by the hot pin data acquisition unit scene temperature signal is gathered and conversion of signals, and the analysis of working state of heat rod determining unit, finish the scene of frozen earth roadbed working state of heat rod and detect, this testing result can reflect working state of heat rod truly and be suitable for the abominable scene detection of environment.And method and system provided by the present invention can not only be used for the hot pin applying unit, also can be used for simultaneously the detection of dispatching from the factory of hot pin manufacturer.
Claims (17)
1, a kind of working state of heat rod detection system is characterized in that, this system is made up of hot pin data acquisition unit and working state of heat rod determining unit;
The hot pin data acquisition unit, the temperature signal of collection hot pin is converted to digital signal with the temperature signal that collects, and sends this digital signal to the working state of heat rod determining unit then;
The working state of heat rod determining unit is determined working state of heat rod according to the digital signal that receives.
2, system according to claim 1 is characterized in that, described hot pin data acquisition unit and working state of heat rod determining unit are arranged in two separate equipment, perhaps are integrated in the equipment.
3, system according to claim 2 is characterized in that, described hot pin data acquisition unit comprises:
Data acquisition module: after gathering the temperature signal of hot pin, temperature signal is converted to digital signal, and output;
Data memory module: the digital signal of data acquisition module output is stored;
Data transmission module: the digital data transmission that will be stored in the data memory module arrives the working state of heat rod determining unit.
4, system according to claim 3 is characterized in that, described data acquisition module comprises:
Temperature sensor: after gathering the temperature signal of hot pin, temperature signal is converted to electric signal sends signal conditioning circuit to;
Signal conditioning circuit: send A/D convertor circuit to after electric signal nursed one's health;
A/D convertor circuit: receive the electric signal after the conditioning, and the electrical signal conversion after will nurse one's health is digital signal, and exports.
5, system according to claim 3 is characterized in that, described hot pin data acquisition unit further comprises controller;
Controller, the control data acquisition module is gathered the temperature signal of hot pin and temperature signal is converted to digital signal, the control data memory module is stored digital signal, and the control data transmission module is given the working state of heat rod determining unit with digital data transmission.
6, system according to claim 5 is characterized in that, described hot pin data acquisition unit further comprises man-machine interactive system;
Man-machine interactive system, the instruction that operating personnel are assigned sends to described controller, and the temperature signal that receives is offered operating personnel;
Controller, receive finish after the instruction control and treatment and with data collecting module collected to temperature signal feed back to man-machine interactive system.
7, system according to claim 6 is characterized in that, described controller, data memory module and man-machine interactive system are integrated in the equipment.
8, system according to claim 1 is characterized in that, described working state of heat rod determining unit comprises:
Data communication module: be used to receive the digital signal that the hot pin data acquisition unit transmits, and send digital signal to data processing module;
Data processing module: be used for that the digital signal that receives is carried out linear fit and handle, and send result to data analysis module;
Data analysis module: will analyze through the data processing module data processed, and determine the duty of hot pin.
9, system according to claim 8 is characterized in that, described working state of heat rod determining unit further comprises database;
Described database is used to store the digital signal that data communication module receives, and/or the data processing module data processed, and/or the result after the data analysis module analysis.
10, a kind of working state of heat rod detection method is characterized in that, this method may further comprise the steps:
1) temperature signal of hot pin is gathered;
2) convert the temperature signal that collects to digital signal;
3) digital signal is carried out analyzing and processing, determine working state of heat rod.
11, method according to claim 10 is characterized in that, the temperature signal on the described hot pin heat radiator is the temperature signal of differing heights on the hot pin heat radiator.
12, according to claim 10 or 11 described methods, it is characterized in that step 3) comprises: described digital signal is carried out linear fit handle, handle resulting intercept, determine working state of heat rod according to linear fit.
13, method according to claim 12, it is characterized in that, described definite working state of heat rod is: the intercept of the hot pin of the operate as normal under resulting intercept and the equivalent environment temperature is compared, if resulting intercept, determines then that this hot pin work is undesired less than the intercept of the hot pin of operate as normal; If resulting intercept is not less than the intercept of the hot pin of operate as normal, determine that then this hot pin is working properly.
14, method according to claim 13, it is characterized in that, further comprised before the intercept of described hot pin with the operate as normal under resulting intercept and the equivalent environment temperature compares: the slope of linear fit being handled the hot pin of the operate as normal under resulting slope and the equivalent environment temperature compares, if the absolute value of both differences does not exceed desirable scope, then proceed the step that the intercept with the hot pin of the intercept of this hot pin and the operate as normal under the equivalent environment temperature compares; If the absolute value of both differences exceeds desirable scope, then return step 1).
15, method according to claim 12 is characterized in that, comprises before the linear fit processing described digital signal is carried out: the integrality of judging digital signal; If digital signal is complete, then carry out the linear fit of digital signal is handled.
16, method according to claim 15 is characterized in that, if judge that digital signal is imperfect, then abandons this digital signal, returns step 1).
17, method according to claim 16 is characterized in that, after judging that digital signal is imperfect, utilizes the method for linear difference that digital signal is carried out completion, carries out then the linear fit of digital signal is handled.
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| CN103114600A (en) * | 2013-03-04 | 2013-05-22 | 中铁西北科学研究院有限公司 | Method for conducting active thermal protection on tunnel shallow buried section in permafrost region using hot bar cluster |
| CN103782193A (en) * | 2011-09-05 | 2014-05-07 | 奥迪克激光应用技术股份有限公司 | Device and method for determination of a position of an object by means of ultrasonic waves |
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| CN2679247Y (en) * | 2004-01-08 | 2005-02-16 | 中国科学院寒区旱区环境与工程研究所 | Heat isolating and temp lowering appts. for protecting for frozen earth |
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| CN1793526A (en) * | 2005-12-20 | 2006-06-28 | 中国科学院寒区旱区环境与工程研究所 | High efficient undirectional thermal conducting apparatus for reducing rodabed frozen soil earth temp. field |
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| CN102419248A (en) * | 2011-08-19 | 2012-04-18 | 北京林业大学 | Device and method for measuring soil wind erosion rate |
| CN103782193A (en) * | 2011-09-05 | 2014-05-07 | 奥迪克激光应用技术股份有限公司 | Device and method for determination of a position of an object by means of ultrasonic waves |
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| CN108507939A (en) * | 2018-03-27 | 2018-09-07 | 河海大学 | A kind of real-time measurement apparatus and its measurement method of the variation of temperature and humidity control cement-based material length |
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| CN100446048C (en) | 2008-12-24 |
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Assignee: Xi'an Jinlu Traffic Engineering Technology Development Co., Ltd. Assignor: China first highway investigation and Design Institute|Northwestern Polytechnical University Contract record no.: 2011610000092 Denomination of invention: Method and system for testing working state of heat rod Granted publication date: 20081224 License type: Exclusive License Open date: 20070418 Record date: 20110711 |
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