CN114526847A - Health monitoring system suitable for large-size space net rack - Google Patents
Health monitoring system suitable for large-size space net rack Download PDFInfo
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- CN114526847A CN114526847A CN202111646258.5A CN202111646258A CN114526847A CN 114526847 A CN114526847 A CN 114526847A CN 202111646258 A CN202111646258 A CN 202111646258A CN 114526847 A CN114526847 A CN 114526847A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 30
- 230000036541 health Effects 0.000 title claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 10
- 230000033001 locomotion Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/10—Measuring force or stress, in general by measuring variations of frequency of stressed vibrating elements, e.g. of stressed strings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/10—Measuring force or stress, in general by measuring variations of frequency of stressed vibrating elements, e.g. of stressed strings
- G01L1/106—Constructional details
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
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Abstract
The invention discloses a health monitoring system suitable for a large-size space network frame. The data acquisition module comprises a plurality of sensors for monitoring the large-scale space grid structure, and the monitored data are sent to the data processing module; and the data processing module processes and analyzes the data and then sends the data to the data presentation module for data presentation.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a health monitoring system suitable for a large-size space grid.
Background
In the years, with the rapid development of national economy of China, the requirements of new building systems and structures are gradually increased, and particularly, large investment in large-scale public facilities such as high-speed railways, military and civil airports and the like in China is greatly increased, so that a large-span structure with the advantages of good integrity, strong stability, large space rigidity, convenience in construction and the like is developed vigorously. However, large-scale public facilities have large span and higher safety requirements, and the monitoring of the large-scale public facilities in the construction and use processes is particularly important. In the prior art, a manual monitoring and on-site investigation method is generally adopted for monitoring a large-span structure, and the method has the defects of low efficiency, slow response, difficult positioning of a dangerous area and the like in the monitoring process of the working state of the structure, and meanwhile, the operation and maintenance cost of a project can be greatly increased due to the investment of a large number of monitoring personnel.
Disclosure of Invention
The invention aims to provide a health monitoring system suitable for a large-size space grid structure, which can realize real-time monitoring of the working state of an in-service space grid structure system and damage positioning of key areas of key parts on the basis of ensuring that monitoring personnel are greatly reduced, improve the accuracy and sensitivity of monitoring of a large-span structure, effectively reduce the engineering operation and maintenance cost, more comprehensively reflect the states of deformation, damage and the like of a monitoring structure and solve the problems in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a health monitoring system suitable for a large-size space network frame comprises a data acquisition module, a data processing module and a data presentation module.
The data acquisition module comprises a plurality of sensors for monitoring the large-scale space grid structure, and the monitored data are sent to the data processing module;
and the data processing module processes and analyzes the data and then sends the data to the data presentation module for data presentation.
As a preferred technical scheme, the sensor comprises two mounting blocks and a coil shell, the two mounting blocks are communicated with the coil shell through protective pipes, two ends of a string are respectively positioned in the two mounting blocks, a coil which is arranged opposite to the string is arranged in the coil shell, the coil is connected with a cable, the sensor is characterized in that,
the protection tube is a telescopic tube, one end of the string is arranged in one mounting block, and the other end of the string is arranged on the string releasing mechanism in the other mounting block; the pay-off mechanism comprises a wire wheel, and the other end of the string is wound on the wire wheel along a single strand of the wire wheel axis; the wire wheel is rotatably arranged in the mounting block through a wire wheel shaft and can linearly move relative to the wire wheel shaft; the pay-off mechanism further comprises a driving structure, the driving structure is connected with the wire wheel, the wire wheel is driven to rotate, and meanwhile, the wire wheel is pushed to move linearly, so that the rotation of the wire wheel is synchronous with the linear movement of the wire wheel.
As a preferred technical scheme, the driving structure comprises a gear transmission component and a linear motion component, and the rotating handle is connected with the wire wheel through the gear transmission component to drive the wire wheel to rotate; the rotating handle is connected with the wire wheel through the linear motion assembly to drive the wire wheel to move linearly.
As a preferred technical scheme, the gear transmission assembly comprises a driving gear and a driven gear meshed with the driving gear, the driving gear is connected with the rotating handle, and the driven gear is connected with the wire wheel.
As a preferred technical scheme, the linear motion component comprises a screw rod and a nut with threads arranged outside, the nut is fixedly connected with the wire wheel, and the nut is meshed with the screw rod.
As a preferred technical scheme, the protective tube is provided with scales.
As a preferred technical scheme, the outer wall of the mounting block corresponding to the rotary handle is provided with annular scales, the annular scales are marked with string releasing amount corresponding to the degree of the rotary handle, and the rotary handle is provided with an indicating arrow.
As a preferred technical scheme, the reel shaft is provided with a guide strip, and the inner wall of the reel is provided with a guide groove matched with the guide strip.
As a preferred technical scheme, the rotating handle is detachably connected with the driving gear.
Drawings
FIG. 1 is a block diagram of the present invention.
Fig. 2 is a schematic structural diagram of the vibrating wire sensor.
Fig. 3 is an enlarged schematic view of a point a in fig. 2.
Wherein the reference numerals are as follows:
1-mounting block, 2-protection tube, 3-coil shell, 4-string, 5-reel shaft, 6-guide strip, 7-reel, 8-driving gear, 9-driven gear, 10-nut and 11-screw.
Detailed Description
The present invention is further described below by way of specific embodiments, but the present invention may be described by other embodiments without departing from the technical features of the invention, and therefore all changes within the scope of the present invention or the equivalent scope of the present invention are encompassed by the present invention.
Examples
A health monitoring system suitable for a large-size space network frame comprises a data acquisition module, a data processing module and a data presentation module.
The data acquisition module is a sensor system, and comprises a plurality of sensors for monitoring the large-scale space grid structure, and the monitored data are sent to the data processing module.
The data processing module analyzes various working conditions by adopting an exhaustion method according to finite elements to determine an equipment arrangement scheme under various characteristic loads (wind, rain, earthquake and the like). And moreover, calculating a result, drawing a response envelope curve of each monitoring point, determining a limit response value of the response envelope curve, and formulating alarm rules (primary alarm, secondary early warning and tertiary early warning) according to three levels of 80%, 50% and 30%. When the acquisition end acquires one data, the data is compared with the alarm system value, and if the data exceeds the alarm system value, an alarm is given; otherwise, no alarm is given.
The data presentation module presents the data, so that the working personnel can provide corresponding measures (reinforcement, replacement or abandonment) for the alarm point location according to the relevant load form and by combining the existing data such as the standard, the regulation, the manual and the like.
In this embodiment, the sensors used in the sensor system are vibrating wire sensors that are used more in the building field, but because the system is applied to a large-scale public facility, a large number of detection points on the large-scale public facility need to be detected by the vibrating wire sensors. Besides the detection points on the plane, the large public facilities inevitably have many detection points on non-planes, such as spherical surfaces, wavy surfaces and other irregular planes. This makes it necessary to have multiple types of vibrating wire sensors to match different sensing points.
The action mechanism of the vibrating wire sensor is a resonant sensor which takes a tensioned metal wire as a sensitive element. After the length of the string is determined, the variation of the natural vibration frequency can represent the magnitude of the tensile force applied to the string, and an electric signal in a certain relation with the tensile force can be obtained through a corresponding measuring circuit. The relation between the natural frequency f of the vibrating wire and the tension sigma is that L is the length of the vibrating wire and rho is the mass of unit chord length.
In the prior art, the length of the string is determined, and the length of the whole vibrating wire sensor is fixed. And a large number of detection points on the large-size space net rack need to be detected by a vibrating wire sensor. Besides the detection points on the plane, the large space net rack inevitably has a plurality of detection points on the non-plane, such as a spherical surface, a wavy surface and other irregular planes. Therefore, vibrating wire sensors with various sizes are needed to be matched with different detection points, and if the matched vibrating wire sensors cannot be found in the market, the vibrating wire sensors need to be customized, so that the vibrating wire sensors are troublesome and cannot be flexibly adjusted according to actual field conditions.
Therefore, in the present embodiment, the structure of the vibrating wire sensor is designed.
The vibrating wire sensor comprises two mounting blocks 1 and a coil shell 3. The two mounting blocks 1 are communicated with the coil housing 3 through a protection tube 2. The two ends of the string 4 are respectively positioned in the two mounting blocks 1. The coil case 3 is provided with a coil disposed opposite to the string 4, and the coil is connected to a cable to output vibration data of the string 4.
In this embodiment, the two protection tubes 2 are both telescopic tube structures. So that the overall size of the sensor is adjustable. And necessarily, the size of the string 4 is also variable.
In this embodiment, the size of the string 4 changes, but the tension applied to the string 4 is constant, so that the length change can be ensured, and the natural vibration frequency of the vibrating string 4 sensor can be obtained according to the initial factory tension and a formula, so that the calculation of the subsequently acquired data can be realized. The idea of ensuring that the tension applied to the string 4 is constant is that, on the basis that the two ends of the string 4 are fixed, the elongation of the protection tube 2 is equal to the elongation of the string 4, and then the tension applied to the string 4 is the same. To solve this technical problem, the present embodiment has the following design.
The protection pipe 2 is provided with scales, so that constructors can clearly know the extension amount of the protection pipe 2. Further, one end of the string 4 is fixed in one mounting block 1, and the other end of the string 4 is arranged on a string releasing mechanism in the other mounting block 1.
The string releasing mechanism comprises a line shaft 5, a line wheel 7, a driving gear 8 and a driven gear 9, the line shaft 5 is rotatably arranged in the mounting block 1, and the line wheel 7 is sleeved on the line shaft 5 and rotates along with the line shaft 5.
Still be equipped with driven gear 9 on the line shaft 5, driven gear 9 meshing connection driving gear 8, driving gear 8 is through the rotatable setting of pivot in installation piece 1, and driving gear 8's pivot can be dismantled and be connected with rotatory handle, and rotatory handle setting is outside installation piece 1. An indicating arrow is arranged on a rotating shaft of the rotating handle, annular scales are coaxially arranged on the outer wall of the mounting block 1 and the rotating shaft, and the degree of the rotating handle and the corresponding string releasing amount are marked on the annular scales. Thus, the string releasing amount is also known clearly, and due to the adoption of the gear transmission structure, when the rotary handle stops rotating, the end of the string 4 is fixed through the gear locking.
The tension applied in the initial state is the same as the tension applied in the protective tube 2 as long as the amount of each unwinding is the same as the amount of elongation of the protective tube.
Furthermore, due to the adoption of the string releasing of the wire wheel 7, if the winding of the strings 4 on the wire wheel 7 is not on the same plane or the line outgoing position of the wire wheel 7 changes, the string releasing amount marked on the outer wall of the mounting block 1 has errors, so that the stressed tension is inaccurate, and the tension has errors, therefore, the embodiment has the following design.
The single-strand uniplanar winding of string 4 is on line wheel 7, and the mechanism of putting the string still includes screw rod 11, is equipped with two gibs 6 that set up relatively on the line wheel axle 5. The inner wall of the reel 7 is provided with a guide groove matched with the guide strip 6, so that the reel 7 rotates along with the reel shaft 5 and can move linearly relative to the axis of the reel shaft 5.
Still fixed screw rod 11 that is equipped with the parallel of line shaft 5 in the installation piece 1, the cover is equipped with the nut 10 that the outer wall was equipped with the screw thread on the line shaft 5, nut 10 and line wheel 7 fixed connection. The inner wall of the nut 10 is also provided with a guide groove or the inner diameter of the nut can avoid the guide strip 6.
The nut 10 engages with the screw 11. When the rotary handle rotates, the driven gear 9 drives the line wheel shaft 5 to rotate, at the moment, the line wheel 7 releases the string, meanwhile, the nut 10 rotates relative to the screw rod 11, the screw rod 11 exerts driving force on the nut 10, and therefore the line wheel 7 moves on a straight line, and the string releasing port at each time is located at the same position.
Furthermore, a string outlet 4 pipe is fixedly arranged in the mounting block 1, the string outlet 4 pipe corresponds to the string releasing port, the string outlet 4 pipe is arranged between the protective pipe 2 and the wire wheel 7, and the string 4 passes through the string outlet 4 pipe during string releasing.
Through the structure, the stretching change of the string 4 and the stretching change of the protection tube 2 are realized, and the tension of the string 4 can be ensured to be constant on the premise of reading by constructors.
In this embodiment, rotatory handle can be dismantled with the pivot of driving gear 8 and be connected for size adjustment finishes, and when two installation pieces 1 welded on the rack, demolish rotatory handle. The detachable connection mode can be that the rotating shaft part of the driving gear 8 slightly protrudes out of the mounting block 1, a square slot is arranged on the rotating shaft, and a square inserting end is arranged on the rotating handle, so that detachable connection is realized.
It should be noted that, based on the above structural design, in order to solve the same technical problems, even if some insubstantial modifications or colorings are made on the present invention, the adopted technical solution is still the same as the present invention, and therefore, the technical solution should be within the protection scope of the present invention.
Claims (9)
1. A health monitoring system suitable for large-size space net racks is characterized by comprising a data acquisition module, a data processing module and a data presentation module;
the data acquisition module comprises a plurality of sensors for monitoring the large-scale space grid structure, and the monitored data are sent to the data processing module;
and the data processing module processes and analyzes the data and then sends the data to the data presentation module for data presentation.
2. The health monitoring system suitable for the large-size space network frame according to claim 1, wherein the sensor comprises two mounting blocks and a coil housing, the two mounting blocks are communicated with the coil housing through a protection tube, two ends of the string are respectively positioned in the two mounting blocks, the coil housing is provided with a coil opposite to the string, the coil is connected with a cable, and the health monitoring system is characterized in that,
the protection tube is a telescopic tube, one end of the string is arranged in one mounting block, and the other end of the string is arranged on the string releasing mechanism in the other mounting block; the pay-off mechanism comprises a wire wheel, and the other end of the string is wound on the wire wheel along a single strand of the wire wheel axis; the wire wheel is rotatably arranged in the mounting block through a wire wheel shaft and can linearly move relative to the wire wheel shaft; the pay-off mechanism further comprises a driving structure, the driving structure is connected with the wire wheel, the wire wheel is driven to rotate, and meanwhile, the wire wheel is pushed to move linearly, so that the rotation of the wire wheel is synchronous with the linear movement of the wire wheel.
3. The health monitoring system suitable for the large-size spatial net rack according to claim 2, wherein the driving structure comprises a gear transmission component and a linear motion component, and the rotating handle is connected with the wire wheel through the gear transmission component to drive the wire wheel to rotate; the rotating handle is connected with the wire wheel through the linear motion assembly to drive the wire wheel to move linearly.
4. The health monitoring system for the large-space net rack according to claim 3, wherein the gear transmission assembly comprises a driving gear and a driven gear engaged with the driving gear, the driving gear is connected with the rotating handle, and the driven gear is connected with the wire wheel.
5. The health monitoring system for the space network frame in large size as claimed in claim 4, wherein the linear motion assembly comprises a screw rod and a nut with threads on the outside, the nut is fixedly connected with the wire wheel, and the nut is meshed with the screw rod.
6. The health monitoring system suitable for the large-size spatial net rack according to claim 2, wherein the protection tube is provided with scales.
7. The health monitoring system suitable for the large-size space net rack according to claim 3, wherein the outer wall of the mounting block corresponding to the rotating handle is provided with an annular scale, the annular scale is marked with string releasing amount corresponding to the degree of the rotating handle, and the rotating handle is provided with an indicating arrow.
8. The health monitoring system for the large-size spatial net rack according to claim 2, wherein the reel shaft is provided with a guide strip, and the inner wall of the reel is provided with a guide groove matched with the guide strip.
9. The system as claimed in claim 5, wherein the rotary handle is detachably connected to the driving gear.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111646258.5A CN114526847B (en) | 2021-12-30 | 2021-12-30 | Health monitoring system suitable for large-scale space network frame |
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| CN202111646258.5A CN114526847B (en) | 2021-12-30 | 2021-12-30 | Health monitoring system suitable for large-scale space network frame |
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