CN102161429B - On-line monitoring device and method of belt conveyor fault based on optical fiber technology - Google Patents
On-line monitoring device and method of belt conveyor fault based on optical fiber technology Download PDFInfo
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- CN102161429B CN102161429B CN2010106224099A CN201010622409A CN102161429B CN 102161429 B CN102161429 B CN 102161429B CN 2010106224099 A CN2010106224099 A CN 2010106224099A CN 201010622409 A CN201010622409 A CN 201010622409A CN 102161429 B CN102161429 B CN 102161429B
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Abstract
The invention relates to an on-line monitoring device and a method of belt conveyor fault based on optical fiber technology, which comprises a monitoring host, an optical cable and sensor units, wherein the optical cable is led out of the monitoring host and is laid along a belt, and the sensor units are arranged on the optical cable and are arranged at guide rollers; and sensing optical fibers are contained in the sensor units. The invention also provides a method for on-line monitoring of the belt conveyor fault according to the on-line monitoring device. The on-line monitoring device has the advantages of strong practicality, low omission rate, timely alarm, simple construction, long service life and the like.
Description
Technical field
The present invention relates to a kind of belt conveyer On-line Fault monitoring device and method, especially a kind of optical fiber technology that adopts is carried out the device and method of on-line monitoring to belt conveyer deflector roll fault.
Background technology
The modal fault of belt conveyer is that deflector roll is stuck, and deflector roll stuck after, be easy to cause large-scale fire accident.Its accident mechanism is often as described below:
Because the Leather Belt Conveyance distance is very long, its deflector roll One's name is legion, be difficult to ensure that whole deflector rolls all have good quality and life-span, and indivedual deflector rolls that are in operation are understood quick losses and caused bearing stuck;
Simultaneously, belt conveyer environment of living in is poor, is easy to enter dust in the deflector roll bearing, also can cause the deflector roll bearing stuck;
Once, after the deflector roll bearing damage is stuck, belt will continue friction in guide roller surface, make deflector roll accumulate a large amount of heats, the deflector roll temperature rises to very high, as temperature in half an hour can reach several Baidu; After parking, actionless belt and stuck high temperature deflector roll continuous contact and by roasting combustion, the goods on the beans-and bullets shooter combustion belt feeder of going forward side by side, such as coal dust, wood chip etc., the intensity of a fire enlarges rapidly.
The stuck deflector roll temperature that will cause of deflector roll bearing rises, and by monitoring deflector roll temperature, can judge that whether the mode of operation of deflector roll is normal, thereby judge whether to exist disaster hidden-trouble, and then realize the Belt Conveyor Fire early warning.Prior art generally adopts infrared temperature-measuring gun to be patrolled and examined the deflector roll temperature:
Patrol and examine the relevant device of work timed patrol belt conveyer, by the temperature of infrared temperature-measuring gun check implement, to the deflector roll of temperature anomaly, investigate its reason.Adopt the mode of infrared temperature-measuring gun manual inspection can find the disaster hidden-trouble that belt conveyer exists, but also have following problem:
1, human cost is high
The Leather Belt Conveyance distance is very long, and its deflector roll One's name is legion adopts the inspector to be patrolled and examined the belt conveying machine equipment, will expend a large amount of manpowers, and human cost is high;
2, real-time is poor
Artificial hand-held infrared temperature-measuring gun is patrolled and examined belt conveyer, and the inspector rule of thumb reaches the observed temperature of infrared temperature-measuring gun, judges whether the equipment operation of belt conveyer is normal;
The somewhere deflector roll of belt conveying machine equipment is examined state constantly by the inspector and can be detected by the inspector; But, after the inspector leaves, its state may change, once and its state changes, just likely have disaster hidden-trouble, but the inspector does not know this state variation, until again patrol and examine this place's deflector roll;
The stuck rear rate of rise in temperature of deflector roll is very fast, because the error state to this place not detects and take corresponding measure in time, may cause the situations such as fire; Manual inspection is poor to the real-time of equipment inspection;
Simultaneously, may there be undetected situation in manual inspection.
Summary of the invention
In order to solve deficiency of the prior art, the invention provides a kind of belt conveyer On-line Fault monitoring device and method based on optical fiber technology.
For achieving the above object, the present invention adopts following technical scheme:
A kind of belt conveyer On-line Fault monitoring device based on optical fiber technology, comprise monitoring main frame, optical cable and sensing unit;
Described optical cable is drawn from monitoring main frame, along the belt trend, lays;
On described optical cable, sensing unit is set; Described sensing unit is arranged on the deflector roll place;
Comprise sensing optical fiber in described sensing unit;
Described monitoring main frame is for the treatment of the point type temperature signal of the distributed temperature signal along optical cable transmission and sensing unit.
According to described on-Line Monitor Device, further, 30% or sensing optical fiber that the length l of described sensing optical fiber is not less than on-Line Monitor Device spatial resolution L comprise at least one Fiber Bragg Grating.
According to described on-Line Monitor Device, further, described optical cable and/or sensing unit are laid on guide roller support or guide roller axis.
According to described on-Line Monitor Device, as preferably, the contact surface of described sensing unit and guide roller support or guide roller axis is metallic material, and noncontact face is non-metallic material.
According to described on-Line Monitor Device, as preferably, described sensing unit has ferrimagnetism.
According to described on-Line Monitor Device, as preferably, the inner conduction material of filling of described sensing unit.
According to described on-Line Monitor Device, as preferably, in described sensing unit, be provided with boss, the sensing optical fiber of doubling is strutted.
The present invention also provides a kind of method of on-line monitoring of the belt conveyer fault being carried out according to described on-Line Monitor Device, comprises the following steps:
A, the sensing unit be connected with optical cable in the setting of deflector roll place, described optical cable is drawn from monitoring main frame, along the belt trend, lays;
B, process along the distributed temperature signal of optical cable transmission and the point type temperature signal of sensing unit, and generate alarm message according to result.
According to described on-line monitoring method, further, in step b, according to distributed and point type temperature information, draw temperature or heating rate measured value; Measured value and warning preset value are compared, if measured value reaches preset value, send early warning signal; If do not reach, the deflector roll temperature is continued to monitoring.
According to described on-line monitoring method, further, if ambient temperature is T
0, the measured temperature of sensing optical fiber is T
1, the actual temperature T that sensing optical fiber is corresponding is:
According to described on-line monitoring method, as preferably, described sensing optical fiber the inner doubling hub disk of sensing unit around, the sensing optical fiber fold position struts by the boss be arranged in sensing unit.
Sensing unit is arranged on guide roller axis, and the heat that sensing unit is experienced is via a plurality of links: i.e. guide roller surface, guide roller axis and sensing unit; If sensing unit is arranged on guide roller support, the heat of sensing unit impression via link be: guide roller surface, guide roller axis, guide roller support and sensing unit; A plurality of links have all been experienced in the temperature transmission, and there is certain thermal drop in each link, for this reason, have done the Experimental Study of Heat Transfer of deflector roll in laboratory.
Test is under room temperature environment, uses the heating by electric cooker guide roller surface, and the radiating condition that the simulation deflector roll is surrounded by coal dust, then measure respectively the guide roller surface temperature, the temperature at guide roller axis temperature (with the guide roller support temperature) and sensing unit place.Test result is as follows:
1) sensing unit is arranged on guide roller axis:
| The guide roller surface temperature | The temperature of guide roller axis | Sensing unit is experienced temperature |
| 290℃～300℃ | 200℃～210℃ | 70℃～80℃ |
290 ℃～300 ℃ of deflector roll temperature are smoldered between temperature and inflammation temperature between belt, should belong to dangerous temperature, and now to experience temperature be 70 ℃～80 ℃ to sensing unit, and therefore, we can set 60 ℃ for the alarm temperature of sensing unit; The single measurement result is compared with result of a measurement last time, and the alarm threshold value of its heating rate is: 2 ℃/min.
2) sensing unit is arranged on guide roller support
| The guide roller surface temperature | The temperature of guide roller axis | The guide roller support temperature | Sensing unit is experienced temperature |
| 290℃～300℃ | 200℃～210℃ | 100℃～110℃ | 60℃～70℃ |
According to the above results, set 50 ℃ for the alarm temperature of sensing unit, the alarm threshold value of its heating rate is: 1.7 ℃/min.
The present invention compared with prior art has following beneficial effect:
1, wiring is convenient
Because scene has thousands of deflector rolls, corresponding guide roller support or guide roller axis also have thousands of, guide roller support and guide roller axis are metal material, be generally corrosion-resistant steel, the present invention's employing has ferromagnetic sensing unit belt conveyer deflector roll temperature is monitored, wiring is convenient, can guarantee the sensing unit Fast Installation;
2, cost is low, safety factor is high
Because the sensor fibre of sensing unit by certain-length forms, wiring cost is lower; Therefore, Contents for Monitoring can be the lower guide roll near the tail place, can be also all lower guide rolls, or all deflector rolls, because cost is lower, can not expend more resource yet, thereby making Contents for Monitoring is not only the part lower guide roll near the tail place, and the belt conveyer deflector roll is had to more fully monitoring, and greatly having improved the dynamics of fire preventing, safety factor is high.
The accompanying drawing explanation
Fig. 1 is belt conveyer On-line Fault monitoring device structural representation in embodiment 1;
The structural representation that Fig. 2 is sensing unit in embodiment 1;
Fig. 3 is syllogic grooved deflector roll fire disaster alarming device horizontal section schematic diagram in embodiment 4;
Fig. 4 is the interior sensor fibre canoe schematic diagram of sensing unit in embodiment 4;
Fig. 5 is sensing unit inner structure block diagram in embodiment 4.
The specific embodiment
Embodiment 1
Refer to Fig. 1, Fig. 2, a kind of belt conveyer On-line Fault monitoring device based on optical fiber technology, comprise monitoring main frame, optical cable 110 and sensing unit 161, is provided with sensing unit 161 on optical cable 110; Wherein, the deflector roll of belt conveyer is the flat pattern deflector roll, and deflector roll is arranged on guide roller support 151;
Described optical cable 110 is drawn from monitoring main frame, along the belt trend, lay, belt is driven and is moved by the deflector roll be arranged on guide roller support 151, in order to monitor the temperature of deflector roll, optical cable is arranged on guide roller support 151, the belt conveyer deflector roll is carried out to the distributed temperature monitoring;
Described sensing unit 161 comprises optical cable 111, optical cable 121, can 131 and sensing optical fiber 141;
Sensing optical fiber 141 adopts the mode of coiling to be installed in can 131; Optical cable 111 and optical cable 121 sensing optical fiber 141 interior with being coiled in can 131 through the outer wall of can 131 is connected in the mode of welding; Optical cable 111 and optical cable 121 expose the partial fixing of can 131 on the outer wall of can 131;
Between the optical cable 110 on optical cable 111 and optical cable 121 and sensing unit 161 both sides, adopt the mode of welding to be connected;
Can 131 adopts the good metallic material of permeability of heat to make, and as corrosion-resistant steel, aluminium, titanium alloy etc., so long as this metal has certain rigidity, and can make can have certain compressive property to get final product; The present embodiment can material selection corrosion-resistant steel;
Make because can 131 adopts the corrosion-resistant steel that permeability of heats are good, the temperature information of guide roller support 151 can be reached fast to inner sensing optical fiber 141, make system respond in time the variation of deflector roll temperature, shortened the temperature-responsive time of fiber temperature sensing system; When extraneous impulse force or pressure-acting are arranged at sensing unit 161, because stainless steel material has certain rigidity, can protect in time inner sensing optical fiber 141 simultaneously, avoid damaging;
Because optical cable 111 and optical cable 121 are fixed on the outer wall of can 131, and with the sensing optical fiber 141 that is coiled in can 131 inside, be connected simultaneously, when having external tensile force to act on optical cable 110, there is tension force between optical cable 110 and can 131, can not have influence on the sensing optical fiber 141 that is coiled in can 131 inside; So just guarantee between optical cable 110 and sensing optical fiber 141 not fracture easily, thereby can guarantee the continuous gauging to deflector roll temperature to be monitored;
The distributed temperature monitoring is generally based on fiber raman scattering, Brillouin scattering or Fiber Bragg Grating principle; Spatial resolution is the minimum of the accurately temperature-sensitive fiber lengths that is heated; During based on fiber raman scattering or Brillouin scattering principle, the length of sensing optical fiber is not less than 30% of spatial resolution in sensing unit, variation that can response temperature, and then reach the purpose of reliable warning; During based on the Fiber Bragg Grating principle, the sensing optical fiber in sensing unit comprises at least one Fiber Bragg Grating, can realize the monitoring to temperature;
In the present embodiment, on-line monitoring system is based on the fiber raman scattering principle; Comprise one section sensing optical fiber 141 in sensing unit 161, the length of sensing optical fiber 141 is not less than 30% of spatial resolution, in the time of can after sensing unit 161 is experienced the external temperature response, transferring heat to inner sensing optical fiber 141, sensing optical fiber 141 can sense temperature change, and then can realize the temperature monitoring to short heat affected zone;
Optical cable 110 outside sensing unit 161 itself is also sensor, can realize distributed temperature monitoring, and leak source not improves the reliability of fire disaster alarming device;
Described monitoring main frame is for the treatment of the point type temperature signal of the distributed temperature signal along optical cable transmission and sensing unit;
The present embodiment increases the physical length of optical fiber in the mode of winding optical fiber, to improve the precision of temperature point measurement; If the spatial resolution of system is 1m, the length of getting sensing optical fiber is not less than 0.5m;
Described belt conveyer On-line Fault monitoring device comprises a plurality of sensing units, and the length of the inner sensing optical fiber of each sensing unit can be identical, also can be different, but the length of sensing optical fiber all is at least 0.5m;
If the length l of sensing optical fiber is 0.5m, and the spatial resolution L of system is 1m; If ambient temperature is T
0, the measured temperature of sensing optical fiber is T
1, the actual temperature T that sensing optical fiber is corresponding is:
The present embodiment also provides a kind of belt conveyer On-line Fault monitoring method based on optical fiber technology, comprises the following steps:
A, provide the described belt conveyer On-line Fault of the present embodiment monitoring device;
Optical cable 110 is drawn from monitoring main frame, lay on belt conveyer guide roller support 151 along the belt trend, the belt conveyer deflector roll is carried out to the distributed temperature monitoring;
Monitor on the guide roller support 151 that deflector roll is corresponding sensing unit 161 is set at emphasis; The present embodiment emphasis monitoring deflector roll is along 100 groups of lower guide rolls near the tail place, makes to be subject to the point type temperature monitoring near 100 groups of lower guide rolls at tail place;
B, the signal along optical cable 110 transmission is processed, and carried out early warning according to analysis result, specific as follows:
Measure main frame the distributed temperature signal of the optical cable along optical cable 110 transmission is processed, obtain along the temperature that in the fiber cable laying district, optical cable 110 is experienced, as distributed temperature measured value T '
1;
Measure main frame and draw according to the point type temperature signal of sensing optical fiber 141 transmission in sensing unit 161 temperature that corresponding sensing unit 161 is experienced, as point type measured temperature T
1; The actual point type temperature measured value T that sensing optical fiber is corresponding is:
In the present embodiment, the length l of sensing optical fiber is 0.5m, and the spatial resolution L of system is 1m; Ambient temperature T
0it is 25 ℃;
Measure main frame by distributed temperature measured value T '
190 ℃ of distributed temperature preset values while being arranged on guide roller support with optical cable compare; 50 ℃ of temperature preset values when corresponding actual point type temperature measured value T and sensing unit are arranged on guide roller support by sensing optical fiber compare and generate alarm message;
If the temperature measured value reaches the temperature preset value, send early warning signal, the temperature at the prompting corresponding deflector roll of staff place has reached threshold value of warning, and the deflector roll at this place may be stuck, needs the staff to observe conditions and processed;
If the temperature measured value does not reach the temperature preset value, do not send early warning signal, the belt conveyer deflector roll is continued to monitoring.
The temp measuring system of employing based on optical fiber technology carries out on-line monitoring to the belt conveyer fault, not only can carry out the distributed temperature monitoring to all deflector rolls, so that whole belt conveyer is carried out to comprehensive temperature monitoring; The mode of sensing unit can also be set by the deflector roll place needing the emphasis monitoring, emphasis monitoring deflector roll is carried out to the accurate thermometric of point type;
Sensing unit is comprised of the sensor fibre of certain-length, and wiring cost is lower; Therefore, the emphasis Contents for Monitoring can be the lower guide roll near the tail place, can be also all lower guide rolls, or all deflector rolls, because cost is lower, can not expend more resource yet, thereby making the emphasis Contents for Monitoring is not only the part lower guide roll near the tail place, and the belt conveyer deflector roll is had to more fully monitoring, and greatly having improved the dynamics of fire preventing, safety factor is high.
Embodiment 2
A kind of belt conveyer On-line Fault monitoring device based on optical fiber technology, different from the described belt conveyer On-line Fault of embodiment 1 monitoring device:
The on-line monitoring system of the present embodiment is based on the Brillouin scattering principle;
Heat-conducting medium is filled in inside at the sensing unit can; Heat-conducting medium can for silicone grease or silicone oil etc. can heat by conduction material get final product; The present embodiment is selected silicone grease;
The external temperature of sensing unit can perception is passed to the sensing optical fiber that is coiled in can inside fast by silicone grease, further improve the thermal response efficiency of sensing optical fiber;
Described optical cable is drawn from monitoring main frame, along the belt trend, lays, and belt is driven by deflector roll and moves, and in order to monitor the temperature of deflector roll, optical cable is arranged on the end face of guide roller axis;
Sensing unit is arranged on the end face of emphasis monitoring guide roller axis; In the present embodiment, emphasis monitoring deflector roll is all lower guide rolls;
Sensing unit is arranged on the end face of guide roller axis, the transmission of temperature is directly passed to guide roller axis through guide roller surface, and then it is more direct to the monitoring of deflector roll temperature to pass to sensing unit;
Sensing unit has ferrimagnetism, is adsorbed on guide roller axis; The length of the inner sensing optical fiber of sensing unit is not less than 1m;
Sensing unit has ferrimagnetism, has thousands of the deflector rolls that need the emphasis monitoring if on-the-spot, and employing has ferromagnetic sensing unit is monitored belt conveyer deflector roll temperature, and wiring is convenient, can guarantee the sensing unit Fast Installation;
Simultaneously, many groups deflector roll is carried out to the emphasis monitoring, can not expend too many resource, be not only the part lower guide roll near the tail place thereby make the emphasis Contents for Monitoring, and the belt deflector roll is had to more fully monitoring, greatly improve the dynamics of fire preventing, safety factor is high.
The present embodiment also provides a kind of belt conveyer On-line Fault monitoring method based on optical fiber technology, different from the described belt conveyer On-line Fault of embodiment 1 monitoring method:
In step a, provide the described belt conveyer On-line Fault of the present embodiment monitoring device;
Optical cable is drawn from monitoring main frame, lay on the end face of belt conveyer guide roller axis along the belt trend, the belt conveyer deflector roll is carried out to the distributed temperature monitoring; Sensing unit is adsorbed on respectively on each lower guide roll axle, makes all lower guide roll axles all be subject to the point type temperature monitoring;
In step b, the signal along optical cable transmission is processed, and judged whether to report to the police according to analysis result, specific as follows:
Distributed temperature signal to the optical cable along optical cable transmission is processed, and obtains along the temperature that in the fiber cable laying district, optical cable is experienced, as the temperature measured value;
Point type temperature signal according to the transmission of the sensing optical fiber in sensing unit, draw the temperature that all sensing units are experienced, also as the temperature measured value;
The single measurement time that distributed temperature is measured is 30s, and every 30s carries out one-shot measurement; Each measure complete, by result of a measurement with close on most formerly result of a measurement and compare, draw heating rate; As for a certain group of guide roller axis, this measures the temperature measured value is T
1, the most contiguous corresponding temperature of formerly measuring is T '
1, heating rate is
wherein, Δ t is twice interval time of measurement, and in the present embodiment, twice interval time of measurement is identical with the single measurement time, is 30s;
Heating rate measured value while obtaining single measurement according to the method described above;
When in the present embodiment, optical cable and sensing unit all are arranged on the deflector roll axle head, the heating rate preset value is 2 ℃/min, and all heating rate measured values and heating rate preset value are compared and generate alarm message; If the heating rate measured value reaches the heating rate preset value, send early warning signal, the temperature of the corresponding deflector roll of prompting staff has reached threshold value of warning, needs the staff to observe conditions and is processed;
If the heating rate measured value does not reach the heating rate preset value, do not send early warning signal, the belt conveyer deflector roll is continued to monitoring.
Embodiment 3
A kind of belt conveyer On-line Fault monitoring device based on optical fiber technology, different from the described belt conveyer On-line Fault of embodiment 2 monitoring device:
On-line monitoring system is based on the Fiber Bragg Grating principle, and the optical fibre packages in sensing unit is containing at least one Fiber Bragg Grating; In the present embodiment, near lower guide roll on 200 groups of tail, carrying out the emphasis monitoring, be about on end face that sensing unit is arranged on the guide roller axis of lower guide roll on 200 groups near tail;
Described belt conveyer On-line Fault monitoring device comprises a plurality of sensing units, and the length of each sensing unit internal optical fiber can be identical, also can be different, but the length of optical fiber all comprises at least one Fiber Bragg Grating;
In order to guarantee that the heat that deflector roll that sensing unit is experienced transmits is difficult for distributing, the face do not contacted with guide roller axis at the can of sensing unit arranges non-metallic material, the contact surface that makes described sensing unit and guide roller axis is metallic material, and the contact surface of sensing unit and surrounding air is non-metallic material.
The present embodiment also provides a kind of belt conveyer On-line Fault monitoring method based on optical fiber technology, different from the described belt conveyer On-line Fault of embodiment 2 monitoring method:
In step a, provide the described belt conveyer On-line Fault of the present embodiment monitoring device;
Optical cable is drawn from monitoring main frame, lay on the end face of belt conveyer guide roller axis along the belt trend, the belt conveyer deflector roll is carried out to the distributed temperature monitoring; Sensing unit is adsorbed on respectively on the end face near 200 groups of upper and lower guide roller axis of tail, makes all to be subject to the point type temperature monitoring near 200 groups of upper and lower guide roller axis of tail;
In step b, according to the signal along optical cable transmission, draw the temperature measured value that optical cable that all deflector roll axle heads are corresponding or sensing unit are experienced; Temperature measured value and temperature preset value are compared and generate alarm message; Judge whether to send early warning signal according to alarm message; In the present embodiment, temperature preset value when optical cable is arranged on the deflector roll axle head is 190 ℃, and temperature preset value when sensing unit is arranged on the deflector roll axle head is 60 ℃.
Embodiment 4
Refer to Fig. 3, Fig. 4, Fig. 5, a kind of belt conveyer On-line Fault monitoring device based on optical fiber technology, different from the described belt conveyer On-line Fault of embodiment 2 monitoring device: described guide roller structure is syllogic grooved deflector roll; On optical cable 210 is laid in the support 251 of deflector roll 200 along belt trend; Having ferromagnetic sensing unit 201 is adsorbed on syllogic grooved guide roller support 251; Because all there is support deflector roll 200 both sides, position that can be corresponding with deflector roll on all supports all arranges sensing unit, also can just on two side stands of middle deflector roll, sensing unit be set; In the present embodiment, on two side stands of middle deflector roll 200, sensing unit 231 is set;
Sensing optical fiber 241 the inner doubling hub disk of sensing unit around, sensing optical fiber 241 fold positions strut by the boss 211 that are arranged in sensing unit 201;
Sensing optical fiber 241 canoes can have multiple, sensing optical fiber 241 is enclosed within on a boss 211 on can 231, be 8 words windings along two boss 211 outers or be the O word along two boss 211 outers and be wound around, as long as sensing optical fiber stably can be wrapped on boss 211, get final product in order to avoid sensing optical fiber 241 scatters; The length of the present embodiment sensing optical fiber is 1.5m, and the spatial resolution of on-line monitoring system is 1m;
The inner conduction material of filling of sensing unit 201 can 231; The present embodiment is selected silicone oil;
The external temperature of sensing unit can perception is passed to the sensing optical fiber that is coiled in can inside fast by silicone oil, further improve the thermal response efficiency of sensing optical fiber;
In the present embodiment, in order to guarantee the heat that deflector roll that sensing unit is experienced transmits, be difficult for distributing, the face do not contacted with guide roller support at the can of sensing unit arranges non-metallic material.
The present embodiment also provides a kind of belt conveyer On-line Fault monitoring method based on optical fiber technology, different from the described belt conveyer On-line Fault of embodiment 2 monitoring method:
In step a, provide the described belt conveyer On-line Fault of the present embodiment monitoring device;
Optical cable 210 is drawn from monitoring main frame, along laying on the guide roller support 251 of belt trend deflector roll 200 both sides in the middle of belt conveyer, in the middle of sensing unit 201 is adsorbed on respectively, on deflector roll two side stands 251, make all deflector rolls 200 all be subject to the point type temperature monitoring;
In step b, according to the point type temperature signal of 241 transmission of sensing optical fiber in sensing unit, draw the temperature of all guide roller supports 251 that sensing unit 201 is experienced, as the temperature measured value;
Temperature measured value and the most contiguous formerly result of a measurement are compared, draw the heating rate measured value, then heating rate measured value and heating rate preset value are compared and generate alarm message, and judge whether to send early warning signal according to alarm message; In the present embodiment, heating rate preset value when sensing unit is arranged on guide roller support is 1.7 ℃/min;
Or temperature measured value and temperature preset value are compared and generate alarm message, and judge whether to send early warning signal according to alarm message; In the present embodiment, temperature preset value when sensing unit is arranged on guide roller support is 50 ℃.
Above-mentioned embodiment should not be construed as limiting the scope of the invention.Key of the present invention is: utilize optical fiber technology to carry out on-line monitoring to the belt conveyer fault; To temperature monitoring the time, adopt the sensing optical fiber formation sensing unit of certain-length to carry out the point type accurate temperature measurement to part or all of deflector roll, thereby make the temperature monitoring of deflector roll is more put in place.In the situation that do not break away from spirit of the present invention, within any type of change that the present invention is made all should fall into protection scope of the present invention.
Claims (10)
1. the belt conveyer On-line Fault monitoring device based on optical fiber technology, comprise monitoring main frame, optical cable and sensing unit;
Described optical cable is drawn from monitoring main frame, along the belt trend, lays;
On described optical cable, sensing unit is set; Described sensing unit is arranged on the deflector roll place;
Comprise sensing optical fiber, can in described sensing unit, described sensing optical fiber is arranged in described can, and described optical cable and/or sensing unit are laid on guide roller support or guide roller axis;
Described monitoring main frame is for the treatment of the point type temperature signal of the distributed temperature signal along optical cable transmission and sensing unit.
2. on-Line Monitor Device according to claim 1, it is characterized in that: 30% or sensing optical fiber that the length 1 of described sensing optical fiber is not less than on-Line Monitor Device spatial resolution L comprise at least one Fiber Bragg Grating.
3. on-Line Monitor Device according to claim 1, it is characterized in that: the contact surface of described sensing unit and guide roller support or guide roller axis is metallic material, and noncontact face is non-metallic material.
4. on-Line Monitor Device according to claim 1, it is characterized in that: described sensing unit has ferrimagnetism.
5. on-Line Monitor Device according to claim 1, is characterized in that: the inner conduction material of filling of described sensing unit.
6. on-Line Monitor Device according to claim 1, is characterized in that: be provided with boss in described sensing unit, the sensing optical fiber of doubling is strutted.
7. one kind is carried out the method for on-line monitoring according to the arbitrary described on-Line Monitor Device of claim 1～6 to the belt conveyer fault, comprises the following steps:
A, optical cable is drawn from monitoring main frame, lay along the belt trend, at deflector roll, place arranges sensing unit;
B, process along the distributed temperature signal of optical cable transmission and the point type temperature signal of sensing unit, and generate alarm message according to result.
8. on-line monitoring method according to claim 7, is characterized in that: in step b, according to distributed and point type temperature measurement information, draw temperature or heating rate measured value; Measured value and warning preset value are compared, if measured value reaches preset value, send early warning signal; If do not reach, the deflector roll temperature is continued to monitoring.
9. on-line monitoring method according to claim 7, is characterized in that: if ambient temperature is T
0, the measured temperature of sensing optical fiber is T
1, the actual temperature T that sensing optical fiber is corresponding is:
10. on-line monitoring method according to claim 7 is characterized in that: described sensing optical fiber the inner doubling hub disk of sensing unit around, the sensing optical fiber fold position struts by the boss be arranged in sensing unit.
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| CN110388949B (en) * | 2019-08-19 | 2021-08-03 | 深圳市矽赫科技有限公司 | Optical fiber sensor |
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|---|---|---|---|---|
| KR101450353B1 (en) * | 2006-08-24 | 2014-10-15 | 프로스트 링크스 인크. | Chain wear monitoring device |
| CN100498254C (en) * | 2007-09-04 | 2009-06-10 | 中国西电电气股份有限公司 | High pressure cable and its accessory conductor temperature measuring method |
| CN201266419Y (en) * | 2008-07-25 | 2009-07-01 | 中国计量学院 | Distributed fibre-optical Laman photon temperature-sensing fire disaster detector |
| CN201538576U (en) * | 2009-12-01 | 2010-08-04 | 原平盛大实业有限公司 | Temperature sensing device of belt conveyor |
| CN201914691U (en) * | 2010-12-31 | 2011-08-03 | 聚光科技(杭州)股份有限公司 | Belt conveyor fault online monitoring device based on optical fiber technology |
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2010
- 2010-12-31 CN CN2010106224099A patent/CN102161429B/en active Active
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