CN213397008U - Automatic on-line monitoring device and system for cable clamp slippage - Google Patents
Automatic on-line monitoring device and system for cable clamp slippage Download PDFInfo
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- CN213397008U CN213397008U CN202022736614.XU CN202022736614U CN213397008U CN 213397008 U CN213397008 U CN 213397008U CN 202022736614 U CN202022736614 U CN 202022736614U CN 213397008 U CN213397008 U CN 213397008U
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- cable clamp
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- displacement meter
- cable
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Abstract
The utility model relates to a bridge building technical field especially relates to an automatic on-line monitoring device and system that cable clamp slides, including the main push-towing rope, fixed mounting is in the cable clamp of main push-towing rope below, and at least one sets up on the main push-towing rope of cable clamp top and is separated by the displacement meter of default distance with the cable clamp to the removal end of displacement meter is fixed on the cable clamp, and a plurality of evenly arrange around the cable and be close to the thermometer of cable clamp department. The automatic online cable clamp slippage monitoring device samples cable clamp slippage displacement data and structure temperature near a cable clamp through the displacement meter and the thermometer, can combine a thermometer measurement result and a displacement meter measurement result, and eliminates temperature influence through algorithm correction so as to obtain an accurate cable clamp slippage value.
Description
Technical Field
The utility model relates to a bridge building technical field especially relates to an automatic on-line monitoring device and system that slide of cable clamp.
Background
The cable clamp is an important component in a suspension bridge, a tool for connecting a suspension cable and a main cable and transferring a load on the suspension cable to an important part of the main cable, and is generally made of cast steel, and the common structure is a left-right half type or an upper-lower half type. The high-strength bolt is fixedly arranged at a specific position of the main cable, so that the inner wall of the cable clamp generates pressure on the main cable of the suspension bridge, and the cable clamp is prevented from sliding to a lower position along the main cable of the suspension bridge.
In order to ensure the safety of the suspension bridge, the cable clamp on the main cable of the suspension bridge is subjected to slippage inspection, the slippage inspection of the cable clamp usually adopts a manual inspection method, the time and labor are wasted, the detection precision is low, the detection frequency is low, the problem cannot be found in time, and the detection data cannot be traced. In addition, there is a problem that the risk of the technician working at high altitude is large.
In view of the above, it is necessary to provide an automatic online cable clamp slippage monitoring device and system to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides an automatic on-line monitoring device and system that slide of cable clamp to solve present cable clamp and slide the method that the inspection adopted artifical inspection usually, waste time and energy, detect that the precision is low, detect the frequency low and can not in time discover the problem, and detect data and can not trace back. In addition, there is a problem that the risk of the technician working at high altitude is large.
In order to achieve the above object, the utility model provides an automatic on-line monitoring device that cable clamp slided, include:
a main cable;
a cable clamp fixedly installed below the main cable;
at least one displacement meter which is arranged on the main cable above the cable clamp and is separated from the cable clamp by a preset distance, and the moving end of the displacement meter is fixed on the cable clamp;
a plurality of thermometers are uniformly disposed about the main cable and proximate the cable clamp.
Preferably, the preset distance is 5-15 cm.
Preferably, the number of the thermometers is not less than 4.
Preferably, the displacement meter is one or more of a fiber grating displacement meter, a resistance strain displacement meter, a pull rope type displacement meter and a magnetostriction type displacement meter.
Preferably, the measurement accuracy of the displacement meter is not less than 0.1 mm.
Preferably, the thermometer is one or more of a fiber grating type thermometer, a platinum resistance type thermometer and an infrared type thermometer.
Preferably, the thermometer has a measurement accuracy of not less than 0.5 ℃.
Preferably, the cable clamp is connected to the main cable by a high-strength bolt.
The utility model also provides an automatic online monitoring system that cable clamp slided, include as above-mentioned automatic online monitoring device that cable clamp slided, still include with the thermometer with displacement meter communication connection's data gateway and with data gateway is through limited or wireless connection's backend server.
Compared with the prior art, the utility model provides an automatic on-line monitoring device and system that slide of cable clamp have following beneficial effect:
the utility model provides an automatic on-line monitoring device and system of cable clamp slip, including the main push-towing rope, fixed mounting is in the cable clamp of main push-towing rope below, at least one sets up on the main push-towing rope of cable clamp top and with the cable clamp is separated by the displacement meter of default distance, and the removal end of displacement meter is fixed on the cable clamp, a plurality of evenly arrange around the main push-towing rope and be close to the thermometer of cable clamp department. The automatic on-line cable clamp slippage monitoring device collects and measures displacement data and temperature data of cable clamp slippage through the displacement meter and the thermometer according to a certain sampling frequency, combines a thermometer measurement result and a displacement meter measurement result, and eliminates temperature influence through algorithm correction so as to obtain an accurate cable clamp slippage value, and meanwhile, the automatic alarming module is also arranged, and automatic alarming can be realized if the cable clamp slippage value exceeds a preset threshold value. The device and the system have the advantages that the automatic measurement of the slippage of the cable clamp is realized, the test frequency is high, and the problems can be found in time; the measurement precision of the cable clamp slippage value corrected by temperature is high; when the monitoring value exceeds the limit value, the alarm can be automatically given. Thereby realizing the automatic on-line monitoring of the slippage of the cable clamp.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is an overall perspective view of an automatic on-line cable clamp slippage monitoring device according to an embodiment of the present invention;
fig. 2 is an overall front view of the automatic on-line cable clamp slippage monitoring device according to an embodiment of the present invention;
fig. 3 is an overall right side view of the automatic on-line cable clamp slippage monitoring device according to an embodiment of the present invention;
fig. 4 is an overall plan view of the automatic on-line cable clamp slippage monitoring device according to an embodiment of the present invention;
fig. 5 is a block diagram of the overall structure of the cable clamp slippage automatic online monitoring system according to an embodiment of the present invention.
The purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.
The reference numbers illustrate:
a main cable 100; a main cable high end 101; a main cable low end 102;
a cable clamp 110; the left half 111 of the cable clamp; a cable clamp right half 112; a high-strength bolt 113; the interior wall 114 of the cable clamp; a cable clamp end face 115;
a displacement meter 120; a displacement meter fixing end 121; displacement meter moving end 122;
a thermometer 130;
a data gateway 140;
a server 150;
a mobile terminal 160;
and a computer terminal 170.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides an automatic on-line cable clamp slippage monitoring device, which includes: a main cable 100; a cable clamp 110 fixedly installed under the main cable 100; at least one displacement gauge 120 disposed on the main cable 100 above the cable clamp 110 at a predetermined distance from the cable clamp 110, and having a moving end 122 fixed to the cable clamp 110; a plurality of thermometers 130 are uniformly arranged around the main cable 100 and near the cable clamp 110. The cable clamp 110 is generally of a left-right two-half type and an upper-lower two-half type, in this embodiment, the left-right two-half type cast steel cable clamp 110 is taken as an example, the left-right two-half type cast steel cable clamp 111 and the right-left two-half type cast steel cable clamp 112 are fixedly mounted at a specific position of the main cable 100 through a plurality of high-strength bolts 113, and after the left-right two-half type cast steel cable clamp is mounted, the inner wall 114 of the cable clamp can generate pressure on the main cable 100 through the fastening effect of the high-strength bolts 113, so that the cable clamp 110 can. The displacement gauge 120 is disposed near the lower end 102 of the main cable of the cable clamp 110, and it should be understood that the main cable 100 on both sides of the cable clamp 110 includes the upper end 101 and the lower end 102 of the main cable, and the slippage of the cable clamp 110 means the relative movement of the cable clamp 110 along the lower end 102 of the main cable.
Referring also to fig. 1, the displacement gauge 120 includes a displacement gauge fixing end 121 and a displacement gauge moving end 122, the displacement gauge fixing end 121 is installed on the main cable 100, and since the displacement gauge 120 is a contact sensor, the displacement gauge moving end 122 needs to be fixedly installed on the cable clamp 110, specifically, contact the cable clamp end surface 115. It should be noted here that, as the service life of the cable clamp 110 is prolonged, the material, the internal structure, the load bearing imbalance and the like all cause the cable clamp 110 to slide along the lower end 102 of the main cable, and at this time, the displacement value of the cable clamp 110 can be obtained in real time through the telescopic movement of the displacement meter moving end 122. In addition, the number of the displacement meters 120 may be one or more, and in the present embodiment, the number of the displacement meters 120 used is one. Meanwhile, a plurality of thermometers 130 are uniformly arranged on the periphery of the main cable 100 close to the cable clamp 110, and due to the fact that the change of the temperature can affect the change of the structure, such as the expansion coefficient of an object, algorithm correction needs to be carried out on displacement data monitored by the displacement meter 120, the influence of the temperature is eliminated, accurate cable clamp sliding numerical values are obtained, a cable clamp 110 sliding monitoring threshold value can be set, when the monitored value exceeds the monitoring threshold value, an automatic alarm device can be started in time, and technicians can conveniently deal with the sliding numerical values in time.
Specifically, the algorithm correction method and steps are as follows:
sampling displacement data of the cable clamp 110 relative to the main cable 100, which is acquired by the displacement meter 120, according to a preset sampling frequency;
sampling temperature data collected by the thermometer 130 according to a preset sampling frequency;
obtaining an average temperature vector T of the same section temperature of the main cable 100 according to the temperature data, and obtaining a displacement monitoring vector X of the cable clamp 110 relative to the main cable 100 according to the displacement data;
according to a linear correlation equation of the average temperature vector and the displacement monitoring vector: y is X- (KT-A), and the corrected slip value of the cable clamp is obtained; wherein Y is the corrected cable clamp slip vector, K, A is a correlation fitting constant of temperature and displacement, and the correlation coefficient is not less than 0.85.
Judging whether the cable clamp sliding value meets an automatic alarm triggering condition or not according to whether the cable clamp sliding value is continuously greater than a preset threshold value for 10 times and/or whether the average value in 10 minutes is greater than the preset threshold value or not;
when the cable clamp slippage value meets the condition that the slippage value is continuously greater than a preset limit value for 10 times and/or the average value in 10 minutes is greater than the preset limit value, judging that the slippage value meets an automatic alarm triggering condition, and executing a preset automatic alarm instruction;
and when the cable clamp slippage value does not meet the requirement that the slippage value of the cable clamp is continuously greater than the preset limit value for 10 times and/or the average value in 10 minutes is greater than the preset limit value, the automatic alarm triggering condition is not met, and the current state is maintained.
According to the automatic online cable clamp slippage monitoring device and system, displacement data of cable clamp slippage are collected through the displacement meter 120 according to a certain sampling frequency, the thermometer 130 collects the structural temperature near the cable clamp 110 according to a certain sampling frequency, the temperature measurement result and the displacement meter 120 measurement result are combined, and the temperature influence is eliminated through algorithm correction, so that an accurate cable clamp slippage value is obtained. The automatic measurement that can realize the cable clamp and slide, test frequency is high, can in time discover the problem, and the cable clamp value measurement accuracy of sliding through temperature correction is high simultaneously, and in addition, can automatic alarm when the monitoring value surpasses the limit value to realize the automatic on-line monitoring that the cable clamp slided.
As a specific embodiment of the present invention, the predetermined distance is 5-15 cm. Specifically, the preset distance refers to the minimum distance from the fixed end 121 of the displacement meter to the cable clamp end face 115, and of course, the preset distance may be set according to actual conditions, the main influence factor lies in the type of the selected sensor, the strokes of the moving ends 122 of different types of displacement meters are different, since the displacement meter 120 is a contact-type sensor, the moving end of the displacement meter 120 needs to be in contact with the measured object, the preset distance adopted in this embodiment is 10cm, thus, the moving end 122 of the displacement meter can be effectively in contact with the cable clamp end face 115, the monitoring of the relative displacement data of the cable clamp end face 115 with respect to the main cable 100 can be realized within the effective stroke of the displacement meter 120, and the displacement value of the cable clamp 110 sliding on the main cable 100 can be acquired according to the sampling frequency of one minute.
As a preferred embodiment of the present invention, the number of the thermometers 130 is not less than 4. The temperature gauge 130 is arranged to eliminate the influence of temperature on the sliding value, and since different temperatures have a significant influence on the structure of the object, such as the expansion coefficient, the temperature correction is required to be performed on the displacement data measured by the displacement gauge 120, and the temperature value of the main cable 100 near the cable clamp 110 is not uniform, such as a larger static friction force is generated at a place with a larger load, and a corresponding increase in temperature is generated by the generated internal energy, so that a plurality of temperature gauges 130 need to be uniformly arranged around the main cable 100 near the periphery of the cable clamp 110, and the final temperature is an average temperature value of the same section where the plurality of temperature gauges 130 are located. Thereby improving the accuracy of the finally monitored slip value. Based on this, the arrangement of the number of the thermometers 130 needs to be reasonable, and if the number of the thermometers is too small, the error is large, and the accuracy of the finally obtained slip value of the monitoring cable clamp 110 is low. Referring to fig. 1 again, in the present embodiment, the number of the thermometers 130 is 8, and the thermometers are uniformly arranged around the main cable 100.
Further, the displacement meter 120 is one or more of a fiber grating displacement meter, a resistance strain displacement meter, a pull-cord type displacement meter, and a magnetostrictive displacement meter. Specifically, the displacement meter is a contact sensor, and the displacement meter 120 used in this embodiment is one or more of a fiber grating displacement meter, a resistance strain displacement meter, a pull-cord displacement meter, and a magnetostrictive displacement meter, which are commonly available in the market. Any displacement meter 120 of the present embodiment may be used as long as the displacement meter can perform a sliding displacement value of the cable clamp 110 along the direction of the lower end 102 of the main cable within an effective stroke.
As a preferred embodiment of the present invention, the measurement accuracy of the displacement meter 120 is not lower than 0.1 mm. It should be noted that, the cable clamp slippage automatic online monitoring device has a high requirement on the measurement accuracy of data, the final result error after algorithm correction is easily caused by too low accuracy, meanwhile, slippage of the cable clamp 110 has a great influence on the safety of the suspension bridge, the high accuracy can lead us to issue small slippage change in advance to adopt a corresponding treatment method, and the displacement meter 120 is sampled according to a certain sampling frequency, if the accuracy is too low, the cable clamp slippage value collected between adjacent sampling frequencies is not obviously distinguished, so that effective comprehensive analysis cannot be performed. Therefore, the measurement accuracy of the displacement gauge 120 is not less than 0.1 mm.
Further, the thermometer 130 is one or more of a fiber grating type, a platinum resistance type, and an infrared type thermometer 130. Specifically, the thermometer 130 used in the present embodiment is one or more of the commercially available fiber grating type, platinum resistance type, and infrared type thermometers 130. Any of these thermometers 130 may be used as the thermometer 130 of the present embodiment as long as the structural temperature in the vicinity of the cable clamp 110 can be measured.
As a preferred embodiment of the present invention, the measurement accuracy of the thermometer 130 is not lower than 0.5 ℃. It is clear that, the cable clamp slip automatic online monitoring device has high requirements for the measurement accuracy of data, the accuracy is too low, which easily causes the final result error after algorithm correction to be larger, meanwhile, the slip of the cable clamp 110 has a great influence on the safety of the suspension bridge, the high accuracy can lead us to issue small slip change in advance to adopt a corresponding treatment method, and the thermometer 130 is sampled according to a certain sampling frequency, if the accuracy is too low, the cable clamp slip values collected between adjacent sampling frequencies are not obviously distinguished, so that effective comprehensive analysis cannot be performed. Therefore, the thermometer 130 is selected to have a measurement accuracy of not less than 0.1 mm.
Further, the cable clamp 110 is connected to the main cable 100 by a high-strength bolt 113. The common cable clamp 110 is of a left-right two-half type and an upper-lower two-half type, the embodiment adopts the left-right two-half type, the cable clamp left half 111 and the cable clamp right half 112 are fixedly installed at specific positions of the main cable 100 through high-strength bolts 113, so that the inner wall 114 of the cable clamp generates pressure on the main cable 100 of the suspension bridge, and the cable clamp 110 is prevented from sliding along the direction of the lower end 102 of the main cable of the suspension bridge. The type, model and number of the bolts can be used according to actual needs, but it is necessary to ensure that the pressure applied by the cable clamp 110 to the main cable 100 after installation meets the requirements of the industry standard. In the present embodiment, the number of high-strength bolts 113 is 10.
Referring to fig. 5, the present invention provides an automatic on-line cable clamp slippage monitoring system, which includes the above-mentioned automatic on-line cable clamp slippage monitoring device, and further includes a data gateway 140 in communication connection with the thermometer 130 and the displacement meter 120, and a background server 150 in limited or wireless connection with the data gateway 140. The background server 150 processes and stores the monitored data correspondingly, and sends the result to the internet, so that the user can view the result through the mobile terminal 160 or the computer terminal 170 and perform corresponding treatment. If the monitoring data exceeds the preset threshold value, the background server 150 can automatically alarm in a sound-light or information sending mode, so that automatic online monitoring of cable clamp slippage is realized.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (9)
1. The utility model provides a cable clamp automatic on-line monitoring device that slides which characterized in that includes:
a main cable;
a cable clamp fixedly installed below the main cable;
at least one displacement meter which is arranged on the main cable above the cable clamp and is separated from the cable clamp by a preset distance, and the moving end of the displacement meter is fixed on the cable clamp;
a plurality of thermometers are uniformly disposed about the main cable and proximate the cable clamp.
2. The automatic on-line cable clamp slippage monitoring device according to claim 1, wherein the preset distance is 5-15 cm.
3. The automatic on-line cable clamp slippage monitoring device according to claim 1, wherein the number of the thermometers is not less than 4.
4. The automatic on-line cable clamp slippage monitoring device according to claim 1, wherein the displacement meter is one or more of a fiber grating displacement meter, a resistance strain displacement meter, a pull rope type displacement meter and a magnetostrictive type displacement meter.
5. The automatic on-line cable clamp slippage monitoring device according to claim 4, wherein the measuring accuracy of the displacement meter is not lower than 0.1 mm.
6. The automatic on-line cable clamp slippage monitoring device according to claim 1, wherein the thermometers are one or more of fiber grating type thermometers, platinum resistance type thermometers and infrared type thermometers.
7. The automatic on-line cable clamp slippage monitoring device according to claim 6, wherein the measurement accuracy of the thermometer is not lower than 0.5 ℃.
8. The automatic on-line cable clamp slippage monitoring device of claim 1,
the cable clamp is connected to the main cable through a high-strength bolt.
9. An automatic online cable clamp slippage monitoring system, which is characterized by comprising the automatic online cable clamp slippage monitoring device as claimed in any one of claims 1 to 8, a data gateway in communication connection with the thermometer and the displacement meter, and a background server in wired or wireless connection with the data gateway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022736614.XU CN213397008U (en) | 2020-11-24 | 2020-11-24 | Automatic on-line monitoring device and system for cable clamp slippage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022736614.XU CN213397008U (en) | 2020-11-24 | 2020-11-24 | Automatic on-line monitoring device and system for cable clamp slippage |
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| Publication Number | Publication Date |
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| CN213397008U true CN213397008U (en) | 2021-06-08 |
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| CN202022736614.XU Active CN213397008U (en) | 2020-11-24 | 2020-11-24 | Automatic on-line monitoring device and system for cable clamp slippage |
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- 2020-11-24 CN CN202022736614.XU patent/CN213397008U/en active Active
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