CN104121981A - Remote wireless vibration monitoring device applied to offshore jacket ocean platform - Google Patents
Remote wireless vibration monitoring device applied to offshore jacket ocean platform Download PDFInfo
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- CN104121981A CN104121981A CN201410400581.8A CN201410400581A CN104121981A CN 104121981 A CN104121981 A CN 104121981A CN 201410400581 A CN201410400581 A CN 201410400581A CN 104121981 A CN104121981 A CN 104121981A
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- 210000000352 storage cell Anatomy 0.000 claims description 7
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
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Abstract
The invention discloses a remote wireless vibration monitoring device applied to an offshore jacket ocean platform. The remote wireless vibration monitoring device comprises a single chip, a single chip peripheral circuit, a system main control unit, a data transmission interface module, a data storage unit, an ADC conversion circuit, a signal conditioning circuit, a wireless reception unit, a wireless acquisition unit and acceleration sensors, wherein the wireless acquisition unit is connected with the plurality of acceleration sensors; the wireless acquisition unit is sequentially connected with the single chip after through the wireless reception unit, the signal conditioning circuit and the ADC conversion circuit sequentially; the single chip is connected with the single chip peripheral circuit, the system main control unit, the data transmission interface module and the data storage unit respectively. The remote wireless vibration monitoring device disclosed by the invention is low in power consumption, high in performance, modularized, high in data rate, low in bit error rate, high in robustness, and rapid to install.
Description
Technical field
The present invention relates to a kind of pick-up unit, particularly relate to a kind of long-distance wireless vibration monitoring device being applied in the offshore jacket platforms of shallow sea.
Background technology
Method for testing vibration is a kind of emerging in recent years engineering experiment method of large scale engineering structure being carried out to safety assessment and remaining life prediction, it has, and cost is low, simple and convenient is constructed in test, do not affect the advantages such as normal production, can be widely used in health degree Real-Time Monitoring and the nondestructive examination field of various engineering structures.Popular method for testing vibration is mainly divided into following three classes at present:
(1) environmental excitation method
Environmental excitation method is used the vibration source that various external environment masterpieces are vibration monitoring of engineering structure, and these external environments advocate to comprise: wind-force, seismic force, wave and tidal force, operating load, the acting force to bridge construction during as vehicle and train gap bridge.
Under the effect of above various external environment excitations, the output vibratory response of object construction is collected by a set of sensing system.Exciting source is being made under the prerequisite of certain common hypothesis (as stable state, white noise, unidirectional or known multidirectional vibration source etc.), carry out the mode identification of experimental data, thereby every modal characteristics of object construction can be extracted from measured data.The major advantage of ambient vibration motivational techniques be expense few, little to the normal work influence of structure, be applicable to carrying out long term monitoring.
(2) forced excitation method
Forced excitation method is used the vibrational excitation of the artificial exciting source of manufacturing as structural system, in the ordinary course of things, all uses vibration exciter as forced excitation source.Compared with environmental excitation method, forced excitation method has many-sided advantage.Because the parameters of exciting source can artificially accurately be set, the uncertainty in data acquisition and processing (DAP) process is greatly reduced, thereby given researchist larger degree of freedom.In addition, by adopting filtrator or heightening the amplitude of artificial vibration source, can be easy to structure to separate from the vibratory response to other environmental loads and noise the specific response of known vibration source, thereby reduce the difficulty of measured data processing.With respect to ambient vibration method, forced vibration method need to configure artificial excitation equipment, has therefore increased extra-pay.
(3) free vibration method
Free vibration side's ratio juris is to drag elastic construction away from after its rest position sudden outburst, makes system produce free damping campaign, analyzes by the measurement data to free vibration, can obtain every character of structure.
Up to the present, use method for testing vibration to carry out nondestructive examination to works and be also mainly used in the simply constructed engineering structures such as bridge, and can only obtain the approximate range of structural damage, and the pinpoint realization of structural damage is also only confined in the single environment in laboratory, simple structure thing be studied at present.
The research of the vibration test technology of monitoring for the structural failure such as bridge, railway in recent years launches at home, and application to some extent; Imaging technique, underwater ultrasound 3 Dimension Image Technique, shallow section Detection Techniques under muddy water, hole type scanning probe technology has had certain basis under water.Utilize prior art, the vibration-detecting instrument of exploitation Portable movable, is an important development direction of ocean platform safety guarantee technology.
Traditional industry member vibration monitoring method is mainly hand-held vibration logging, is artificially vibrated logging and monitored the vibration parameters of each point by hand-held.The shortcoming of this method is to need to drop into very large manpower, and for the more severe occasion of work on the spot environment, operating personnel's physical and mental health is greatly affected, and this mode can not be carried out the storage of data automatically, also cannot realize real-time remote monitoring; And operation easier is large, labour intensity is high, production efficiency is very low, can not meet the needs of market development.In addition, the detector of industry member is generally used for the fields such as the detection of environment of plant bearing, wind-force electrical machinery, motor-car, and without the synchronous requirement in collection point, native system is to be used in specially on ocean platform, needs overall Data of Mode.
Tradition vibration measurement instrument adopts measuring point to separate with main frame conventionally, centralized control mode of operation; System extension ability a little less than, and the index such as the methods of the measuring accuracy of measuring point, frequency response range, intelligent degree, system data collection, record, transmission, processing cannot meet the demand of accurate model analysis.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of long-distance wireless vibration monitoring device being applied in the offshore jacket platforms of shallow sea, its low-power consumption, high-performance, modularization, High Data Rate, low error rate, high robustness, and install rapidly.
The present invention solves above-mentioned technical matters by following technical proposals: a kind of long-distance wireless vibration monitoring device being applied in the offshore jacket platforms of shallow sea, it is characterized in that, it comprises single-chip microcomputer, SCM peripheral circuit, system master unit, number passes interface module, data storage cell, ADC change-over circuit, signal conditioning circuit, radio receiving unit, wireless collection unit, acceleration transducer, wireless collection unit is connected with multiple acceleration transducers, wireless collection unit passes through radio receiving unit successively, signal conditioning circuit, after ADC change-over circuit, be connected with single-chip microcomputer, single-chip microcomputer respectively with SCM peripheral circuit, system master unit, number passes interface module, data storage cell is connected.
Preferably, described single-chip microcomputer adopts STM32F208 single-chip microcomputer, single-chip microcomputer and SCM peripheral the electric circuit constitute central processing circuit.
Preferably, described radio receiving unit, wireless collection unit all use Zigbee wireless communication module or Wi-Fi wireless communication module, and are aided with high speed USB number biography interface.
Preferably, described acceleration transducer is selected the accelerometer Model 4803A being produced by Silicon Designs company of the U.S..
Positive progressive effect of the present invention is: low-power consumption of the present invention, high-performance, modularization, High Data Rate, low error rate, high robustness, and install rapidly.
Brief description of the drawings
Fig. 1 is the structural representation that the present invention is applied to the long-distance wireless vibration monitoring device in the offshore jacket platforms of shallow sea.
Fig. 2 is the circuit diagram of data storage cell in the present invention.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
As depicted in figs. 1 and 2, the long-distance wireless vibration monitoring device that the present invention is applied in the offshore jacket platforms of shallow sea comprises single-chip microcomputer, SCM peripheral circuit, system master unit, number passes interface module, data storage cell, ADC change-over circuit, signal conditioning circuit, radio receiving unit, wireless collection unit, acceleration transducer, wireless collection unit is connected with multiple acceleration transducers, wireless collection unit passes through radio receiving unit successively, signal conditioning circuit, after ADC change-over circuit, be connected with single-chip microcomputer, single-chip microcomputer respectively with SCM peripheral circuit, system master unit, number passes interface module, data storage cell is connected.Single-chip microcomputer adopts STM32F207VGT6 single-chip microcomputer, single-chip microcomputer and SCM peripheral the electric circuit constitute central processing circuit.Radio receiving unit, wireless collection unit all use Zigbee wireless communication module or Wi-Fi wireless communication module, and are aided with high speed USB number biography interface.Single-chip microcomputer is responsible for the overall work state of detection system, the mode of operation of the each assembly of coherent system, the back works such as recoding daily log.Wireless collection unit can adopt optimized algorithm according to the difference of noise circumstance, in the mode of software and hardware combining, the wideband input signal of sensor front end is carried out to frequency band screening, with filtering interfering noise, improves signal noise ratio; Rely on traditionally most observing and controlling functions such as signal condition, data acquisition and data recording that system host completes simultaneously.The mode of operation of this distributed capture processing simplified on the one hand system host complexity, improved system redundancy and reliability, greatly strengthen the bulk treatment ability of system simultaneously, for further expanding of systemic-function provides enough spaces.Wireless collection unit comprises storer, analog signal conditioning circuit, wireless data sending unit, and storer uses SD to stick into the storage of row data; Analog signal conditioning circuit mainly comprises ADC and integrated operational amplifier and filtering circuit; Wireless data sending unit uses Zigbee wireless communication module or Wi-Fi wireless communication module, and is aided with high speed USB number biography interface.
Acceleration transducer is selected the accelerometer Model4803A being produced by Silicon Designs company of the U.S..This is a kind of capacitor type micro-machine acceleration transducer, and it has the advantages such as low-power consumption, high sensitivity, low noise, broadband, cost performance are good, substantially can meet the requirement that Platform Vibration detects.Its main performance index is as shown in table 1:
Table 1
| Measurement range | ±10g |
| 3dB frequency response | 0～300Hz |
| Sensitivity | 2V/g |
| Output noise | 13ug/√Hz |
| Maximum antidetonation | 2000g |
| Power consumption | 30mW |
| Temperature drift | ≤300ppm/℃ |
As seen from the above table, the frequency response range of this novel sensor can be low to moderate direct current in theory, fully adapts to the measurement requirement to the ultralow frequency range vibration of the large scale shallow sea jacket platform vibration shape.Its noise average is about 100～200ug in 0～100Hz bandwidth range, considers be about ± 2g of its range ability, and the dynamic range of this sensor reaches 100dB, can meet the requirement of measuring faint Platform Vibration signal completely.The feature of its low-power consumption, resisting strong impact is also particularly suitable for the requirement of field construction in addition.
Main performance index of the present invention is as follows: acceleration transducer is realized orthogonal 3 components outputs, and range is optional: ± 2g～± 10g, Hz-KHz be DC to 300Hz, measuring accuracy is less than 0.1mg, dynamic range is greater than 100dB, weight 56g; Can realize 16 collection point centralized management, wireless transmission distance is greater than 100 meters, and radio management distance is greater than 2000 meters, data can be uploaded in real time, smallest dimension 1ms, can ensure continuous 1kHz sampling in 48 hours and can Fast Installation, and single collection point set-up time is less than 1min; Native system can be worked in the temperature range of-40 DEG C～70 DEG C, is applicable to being not less than under the condition of storm applying, and sensor life-time is greater than 5 years.
Compared with existing industry member product, native system data reliability is stronger, the form that adopts wired sensor and radio transmitting box to be used in combination, acceleration transducer adopts to be close to and closes design, and most of existing system be by sensor package in launch-box, launch-box is fixed, so just make between acceleration transducer and on-the-spot workpiece to exist a lot of bufferings, data reliability is poor, can not reflect true Vibration Condition; Data derive more convenient, and native system can be realized the peek of not unpacking at a high speed, adopt three kinds of means transmission, comprise the design of launch-box shell USB interface, Wi-Fi data transmission and SD card real-time storage, make data acquisition convenient reliable; Real-time monitored is more convenient, and the approach of realization has two, comprises that the wireless real time data of Wi-Fi is uploaded with Zigbee wireless command to issue.The present invention is applicable to marine severe working environment, comprise that sensor signal conditioning module, analog to digital conversion circuit, data recordin module, number pass the intelligent ocean platform vibration-testing unit of interface module, embedded microprocessor module etc., its basic function is that the vibration information of sensor output is undertaken, after filtering, amplification, completing digital collection by analog to digital conversion circuit by signal condition module.These information are stored in extended memory carry out data encapsulation processing together with the supplementary such as sampling time, sampling interval after, whole platform structure vibration detection instrument system adopts the topological structure of distributed sensor networks, formed by multiple remote measurement node units and a system master unit, jointly complete the long-time synchro measure of the platform multiple spot vibration shape.
Above-described specific embodiment; technical matters, technical scheme and beneficial effect to solution of the present invention further describe; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. the long-distance wireless vibration monitoring device being applied in the offshore jacket platforms of shallow sea, it is characterized in that, it comprises single-chip microcomputer, SCM peripheral circuit, system master unit, number passes interface module, data storage cell, ADC change-over circuit, signal conditioning circuit, radio receiving unit, wireless collection unit, acceleration transducer, wireless collection unit is connected with multiple acceleration transducers, wireless collection unit passes through radio receiving unit successively, signal conditioning circuit, after ADC change-over circuit, be connected with single-chip microcomputer, single-chip microcomputer respectively with SCM peripheral circuit, system master unit, number passes interface module, data storage cell is connected.
2. the long-distance wireless vibration monitoring device being applied in the offshore jacket platforms of shallow sea as claimed in claim 1, is characterized in that, described single-chip microcomputer adopts STM32F208 single-chip microcomputer, single-chip microcomputer and SCM peripheral the electric circuit constitute central processing circuit.
3. the long-distance wireless vibration monitoring device being applied in the offshore jacket platforms of shallow sea as claimed in claim 1, it is characterized in that, described radio receiving unit, wireless collection unit all use Zigbee wireless communication module or Wi-Fi wireless communication module, and are aided with high speed USB number biography interface.
4. the long-distance wireless vibration monitoring device being applied in the offshore jacket platforms of shallow sea as claimed in claim 1, is characterized in that, described acceleration transducer is selected the accelerometer Model 4803A being produced by Silicon Designs company of the U.S..
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105080821A (en) * | 2015-08-19 | 2015-11-25 | 杭州成功超声设备有限公司 | Ultrasonic transducer with quantitative amplitude feedback system |
| CN106908143A (en) * | 2017-03-01 | 2017-06-30 | 中国海洋大学 | Ocean platform monitoring system and method |
| CN107084678A (en) * | 2017-05-09 | 2017-08-22 | 上海交通大学 | A kind of novel ocean platform monitoring system |
| CN108915609A (en) * | 2018-07-20 | 2018-11-30 | 中国石油大学(华东) | A kind of intelligence Offshore Drilling Riser is single |
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| CN203376051U (en) * | 2013-07-03 | 2014-01-01 | 国家电网公司 | Power cable operation vibration monitoring system based on acceleration sensor |
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2014
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| CN102637349A (en) * | 2012-03-14 | 2012-08-15 | 中国海洋石油总公司 | Rapid vibration collection instrument for ocean platform structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105080821A (en) * | 2015-08-19 | 2015-11-25 | 杭州成功超声设备有限公司 | Ultrasonic transducer with quantitative amplitude feedback system |
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| CN108915609B (en) * | 2018-07-20 | 2020-11-10 | 中国石油大学(华东) | Intelligent marine drilling riser single joint |
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