CN114526847B - Health monitoring system suitable for large-scale space network frame - Google Patents
Health monitoring system suitable for large-scale space network frame Download PDFInfo
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- CN114526847B CN114526847B CN202111646258.5A CN202111646258A CN114526847B CN 114526847 B CN114526847 B CN 114526847B CN 202111646258 A CN202111646258 A CN 202111646258A CN 114526847 B CN114526847 B CN 114526847B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 23
- 230000036541 health Effects 0.000 title claims abstract description 9
- 238000012545 processing Methods 0.000 claims abstract description 12
- 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 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000004044 response Effects 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
- 230000009471 action Effects 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
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
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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
-
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses a health monitoring system suitable for a large space grid, which 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 space grid structure, and the monitored data are sent to the data processing module; 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-scale space grid.
Background
In the years, along with the rapid development of national economy in China, the requirements on new building systems and structures are gradually increased, and particularly, large-scale public facilities such as high-speed railways, military and civil airports and the like are put into large quantities in China, and the large-span structure with the advantages of good integrity, strong stability, large space rigidity, convenience in construction and the like is vigorously developed. But because the large-scale public facilities span is big, the security requirement is higher, and monitoring in the construction and the use process is especially important. In the past, a manual monitoring and field 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 dangerous areas and the like in the monitoring process of the working state of the structure, and meanwhile, a large amount of monitoring personnel are invested, so that the operation and maintenance cost of engineering can be greatly increased.
Disclosure of Invention
The invention aims to provide a health monitoring system suitable for a large space grid, which can realize real-time monitoring of the working state of the grid system in the service space and damage positioning of key areas of key parts on the basis of greatly reducing monitoring personnel, improve the accuracy and sensitivity of monitoring a large-span structure, effectively reduce the engineering operation and maintenance cost, more comprehensively reflect the deformation, damage and other states of a monitoring structure and solve the problems in the prior art.
In order to achieve the above object, the present invention adopts the following technical scheme:
a health monitoring system suitable for a large 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 space grid structure, and the monitored data are sent to the data processing module;
the data processing module processes and analyzes the data and then sends the data to the data presentation module for data presentation.
As a preferable technical scheme, the sensor comprises two mounting blocks and a coil housing, wherein the two mounting blocks are communicated with the coil housing through a protection tube, two ends of a string are respectively positioned in the two mounting blocks, a coil which is opposite to the string is arranged in the coil housing, a coil connecting cable is arranged in the coil housing,
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 placing mechanism in the other mounting block; the string placing mechanism comprises a reel, and the other end of the string is wound on the reel along the axis of the reel; the wire wheel is rotatably arranged in the mounting block through the wire wheel shaft, and can move linearly relative to the wire wheel shaft; the string discharging mechanism further comprises a driving structure, wherein the driving structure is connected with the wire wheel and drives the wire wheel to rotate and simultaneously push the wire wheel to linearly move, so that the wire wheel rotates and linearly moves synchronously.
As a preferable technical scheme, the driving structure comprises a gear transmission assembly and a linear motion assembly, and the rotary handle is connected with the wire wheel through the gear transmission assembly to drive the wire wheel to rotate; the rotary handle is connected with the wire wheel through the linear motion assembly to drive the wire wheel to linearly move.
As a preferable 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 rotary handle, and the driven gear is connected with the wire wheel.
As a preferable technical scheme, the linear motion assembly comprises a screw rod and a nut with threads arranged outside, wherein the nut is fixedly connected with the wire wheel, and the nut is meshed with the screw rod.
As a preferable technical scheme, the protecting tube is provided with scales.
As a preferable 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 the chord discharging amount corresponding to the degree of the rotary handle, and the rotary handle is provided with an indication arrow.
As a preferable technical scheme, a guide strip is arranged on the reel shaft, and a guide groove matched with the guide strip is arranged on the inner wall of the reel.
As a preferable technical scheme, the rotary handle is detachably connected with the driving gear.
Drawings
FIG. 1 is a block diagram of the present invention.
FIG. 2 is a schematic diagram of a vibrating wire sensor.
Fig. 3 is an enlarged schematic view at a in fig. 2.
Wherein reference numerals are as follows:
1-mounting block, 2-protection tube, 3-coil shell, 4-string, 5-wire wheel axle, 6-guide strip, 7-wire wheel, 8-driving gear, 9-driven gear, 10-nut, 11-screw rod.
Detailed Description
The present invention will be further described with reference to specific embodiments, but the present invention can be described with reference to other embodiments without departing from the technical characteristics of the present invention, and thus all changes that come within the scope of the invention or equivalents thereof are encompassed by the present invention.
Examples
A health monitoring system suitable for a large 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 is used for analyzing various working conditions according to finite elements by adopting an exhaustion method and determining equipment arrangement schemes under various characteristic loads (wind, rain, earthquake and the like). And drawing a response envelope curve of each monitoring point, determining a limit response value, and formulating alarm rules (primary alarm, secondary early warning and tertiary early warning) according to three grades of 80%,50% and 30%. Each time the acquisition end acquires one data, the data is compared with an alarm system value, and the data exceeds the alarm system value to give an alarm; otherwise, the alarm is not given.
The data presentation module presents the data, so that a worker can provide corresponding measures (reinforcing, replacing or abandoning) for the alarm point according to the related load form and combining the current standard, regulations, manual and other data.
In this embodiment, the sensor system is a vibrating wire sensor which is used in the building field more, but since 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 sensor. Besides the detection points which are positioned on the plane, a large-scale public facility inevitably has a plurality of detection points which are positioned on non-plane, such as spherical surfaces, wavy surfaces and other irregular planes. This makes it necessary to use several types of vibrating wire sensors to match different detection 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 change of the natural vibration frequency of the string can be used for representing the tension of the string, and an electric signal which has a certain relation with the tension can be obtained through a corresponding measuring circuit. The relation between the natural vibration frequency f of the vibrating wire and the tension sigma is that L is the length of the vibrating wire, and ρ is the mass of the unit chord length.
In the prior art, the length of the string is determined and the length of the entire vibrating wire sensor is fixed. And a large number of detection points on the large space net rack need vibrating wire sensors for detection. Besides the detection points on the plane, a large space net frame inevitably has a plurality of detection points on non-plane, such as spherical surfaces, wavy surfaces and other irregular planes. Therefore, vibrating wire sensors with various sizes are required to be matched with different detection points, if the matched vibrating wire sensors cannot be found in the market, customization is required, the customization is troublesome, and flexible adjustment cannot be performed 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 housing 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 housing 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, both the protection pipes 2 are telescopic structures. So that the overall size of the sensor is adjustable. And, necessarily, the dimensions of the strings 4 are also variable.
In this embodiment, the dimensions of the strings 4 change, but the tension force of the strings 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 factory tension and the formula, so that the calculation of the data acquired later can be realized. The idea of the present embodiment for ensuring the constant tension of the strings 4 is that, on the basis that the two ends of the strings 4 are fixed, the extension of the protection tube 2 is equal to the extension of the strings 4, so that the tension of the strings 4 is the same. In order to solve this technical problem, the present embodiment also has the following design.
The scale is arranged on the protective tube 2, namely, constructors can clearly know that the protective tube 2 has the elongation. 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 string wheel shaft 5, a string wheel 7, a driving gear 8 and a driven gear 9, wherein the string wheel shaft 5 is rotatably arranged in the mounting block 1, and the string wheel 7 is sleeved on the string wheel shaft 5 and rotates along with the string wheel shaft 5.
The wire wheel shaft 5 is also provided with a driven gear 9, the driven gear 9 is in meshed connection with a driving gear 8, the driving gear 8 is rotatably arranged in the mounting block 1 through a rotating shaft, the rotating shaft of the driving gear 8 is detachably connected with a rotating handle, and the rotating handle is arranged outside the mounting block 1. An indication arrow is arranged on a rotating shaft of the rotating handle, an annular scale is coaxially arranged on the outer wall of the mounting block 1 and the rotating shaft, and the annular scale is marked with the degree of the rotating handle and the corresponding string discharging amount. The string-setting amount is also clearly known, and when the rotation of the rotary handle is stopped due to the adoption of the gear transmission structure, the end of the string 4 is fixed by locking the gear.
Then the tension is the same as in the initial state as long as the amount of payout is the same as the extension of the protective tube 2 each time.
Further, since the wire reel 7 is used for putting the strings, if the strings 4 on the wire reel 7 are wound on the same plane or the wire outlet position of the wire reel 7 is changed, errors are caused in the amount of putting the strings marked on the outer wall of the installation block 1, and thus the tension is inaccurate, and errors are caused in the tension, therefore, the following design is adopted in the embodiment.
The strings 4 are wound on the wire reel 7 in the same plane, the string placing mechanism further comprises a screw 11, and two guide strips 6 which are oppositely arranged are arranged on the wire reel shaft 5. The inner wall of the wire wheel 7 is provided with a guide groove matched with the guide strip 6, so that the wire wheel 7 rotates along with the wire wheel shaft 5 and can linearly move relative to the axis of the wire wheel shaft 5.
The installation block 1 is also internally and fixedly provided with a screw rod 11 parallel to the wire wheel shaft 5, the wire wheel shaft 5 is sleeved with a nut 10 with threads on the outer wall, and the nut 10 is fixedly connected with the wire wheel 7. The inner wall of the nut 10 is also provided with a guide groove, or the inner diameter of the guide groove can avoid the guide strip 6.
The nut 10 is engaged with the screw 11. When the rotary handle rotates, the driven gear 9 drives the spool shaft 5 to rotate, the spool 7 is used for putting strings at the moment, meanwhile, the nut 10 rotates relative to the screw 11, and the screw 11 applies pushing force to the nut 10, so that the spool 7 moves on a straight line, and the string putting ports at each time are located at the same position.
Further, a string outlet 4 pipe is fixedly arranged in the mounting block 1, the string outlet 4 pipe corresponds to a string discharging port, the string outlet 4 pipe is arranged between the protection pipe 2 and the wire wheel 7, and the string 4 passes through the string outlet 4 pipe when the string is discharged.
Through the structure, the telescopic change of the string 4 and the telescopic 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, the rotary handle is detachably connected with the rotation shaft of the driving gear 8, so that the rotary handle is removed when the two mounting blocks 1 are welded on the net rack after the size adjustment is completed. The detachable connection mode can be that the rotating shaft part of the driving gear 8 slightly protrudes out of the installation 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, even if some insubstantial modifications or color-rendering are made on the present invention, the essence of the adopted technical solution is still the same as the present invention, so it should be within the protection scope of the present invention.
Claims (3)
1. A health monitoring system suitable for a large space net rack 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 space grid structure, and the monitored data are sent to the data processing module; the data processing module processes and analyzes the data and then sends the data to the data presentation module for data presentation; the sensor comprises two mounting blocks and a coil housing, wherein the two mounting blocks are communicated with the coil housing through a protection tube, a coil which is arranged opposite to a string is arranged in the coil housing, a coil connecting cable is arranged, and two ends of the string are respectively positioned in the two mounting blocks; the string discharging mechanism comprises a string wheel and a driving structure, wherein the driving structure is connected with the string wheel and drives the string wheel to rotate and simultaneously push the string wheel to linearly move, so that the string wheel rotates and linearly moves synchronously;
the other end of the string is wound on the reel along the reel axis; the wire wheel is rotatably arranged in the mounting block through the wire wheel shaft, and can move linearly relative to the wire wheel shaft;
the driving structure comprises a gear transmission assembly and a linear motion assembly, and the rotary handle is connected with the wire wheel through the gear transmission assembly to drive the wire wheel to rotate; the rotary handle is connected with the wire wheel through the linear motion assembly to drive the wire wheel to move linearly; the outer wall of the mounting block corresponding to the rotary handle is provided with an annular scale, the annular scale is marked with a string-releasing amount corresponding to the degree of the rotary handle, and the rotary handle is provided with an indication arrow;
the linear motion assembly 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; the gear transmission assembly comprises a driving gear and a driven gear meshed with the driving gear, the driving gear is connected with the rotary handle, and the driven gear is connected with the wire wheel.
2. The health monitoring system for large space network frame according to claim 1, wherein the wire wheel shaft is provided with a guide bar, and the inner wall of the wire wheel is provided with a guide groove matched with the guide bar.
3. The system of claim 2, wherein the rotatable handle is removably coupled to the drive gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111646258.5A CN114526847B (en) | 2021-12-30 | 2021-12-30 | Health monitoring system suitable for large-scale space network frame |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111646258.5A CN114526847B (en) | 2021-12-30 | 2021-12-30 | Health monitoring system suitable for large-scale space network frame |
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| CN114526847A CN114526847A (en) | 2022-05-24 |
| CN114526847B true CN114526847B (en) | 2024-03-08 |
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| CN202111646258.5A Active CN114526847B (en) | 2021-12-30 | 2021-12-30 | Health monitoring system suitable for large-scale space network frame |
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